TS4451 / SCOTT [TV]

• Safety mode comes into play.
• Secondary voltages are low.
• Vertical line approx 1/3 from left of picture. Hardly visible, but annoying.
• No start up. PSU does not oscillate.
• No colour, only on French channel "La 3".
• Line transformer blows a few secs later after appliance is started up, line transformer has been changed but fault persists. Output voltage 8.2V instead of 15V on the power supply secondary with the line transformer removed.
• Vertical foldover at top. Dark picture. (part of circuit diagram displayed)
• White picture, flyback line and too bright.
• Switches to standby. after a few minutes. Switches on by itself. after a while. (+ extract of circuit diagram)
• Does not stay on AV, switches sporadically back to HF programme site.
• Picture runs through, impossible to stabilise.
• North/South correction cannot be adjusted correctly. (extract of circuit diagram attached)
• Siren noise in the speaker. (TS4451 SCOTT repair tip)
• Occasionally wide interference lines (similar to a defective HF-cable) appear on the screen. Picture is ok via Scart. (TS4451 tip from SCOTT)
• No start up of line transformer.
• Switches on, line transformer comes on then goes into standby immediately.
• Plastic effect. Does not decode Channel +.
• Switches off after approx 3 secs. PSU switches on with brief chirping noise and then switches off. (service info for SCOTT -TS4451)
• Vertical stage is stuck.
• The appliance stops after a few minutes then starts up again. (part of circuit diagram displayed)
• Power supply crackles once then dead. (TS4451 tips)
• No HF reception. Snow on picture. (SCOTT - TS4451 information)
• Weak contrast.
• Picture pulling on bright scenes.
• Fuse blows at switch on. (part of circuit diagram displayed)
• No red (intermittently).
• Shuts down after 10 mins. Power LED remains lit. (extract of circuit diagram attached)
• No audio (via SCART).
• Sound and picture cut out for a second then return to normal. (picture attached) (SCOTT - TS4451 information)
• No memory during programming.
• When warm picture foldover towards the bottom and horizontal flyback lines. Noise from the line transformer. (extract of circuit diagram attached)
• Tripping sound from flyback transformer, sometimes no picture, another time it switches itself OFF.
• TL19 becomes hot and fails after approx 15 secs.
• HT fails immediately after starting up. PSU switches to standby. (TS4451 tips)
• Collector of the line line output transistor disconnects when soldered. (picture attached)
• No colour. via SCART.
• Power supply starts up for a few secs then collapses while pumping on standby light.
• EHT starts. Line pulse then Stop. (with circuit diagram extract)
• OSD appears on its own. Switches from stereo to mono a number of times. (service info for SCOTT -TS4451)
• Horizontal transistor fails every few days.
• Vertical bars. on the left.
• Difficulty switching on at a high temperature (40°C). You can no longer switch on the appliance with the RC. (extract of circuit diagram attached)
• Distorted picture. Lines in picture.
• Low contrast.
• After being used for 2 to 3 weeks, the 1.6 fuse burns out when the appliance starts up.
• Blackish bar after whites.
• Grey picture with 6 flyback lines without picture content.
• No start-up from standby with RC. (+ extract of circuit diagram)
• FP01 blows at switch on.
• Slight reduction of raster amplitude.
• Flag effect when playing back with a VPH6400 Thomson VCR. Ok via scart.
• No frame sync in PB of recent rented cassettes.
• Streaky luminance and flyback lines. (TS4451 SCOTT repair tip)
• No sound or picture. Standby light switches on and goes off in a regular rhythm. (with circuit diagram extract)
• HV and U-sys too low.
• No RC. No sound, no channel change after changing IR receiver, with or without RC. Manual controls ok.
• No picture at switch on. Picture appears when changing channel. (service info for SCOTT -TS4451)
• No picture (intermittently). AV OK .
• Volume of basic adjustment is too loud.
• Intermittent switches to standby during programme or scene change. (extract of circuit diagram attached)
• When cold picture is very white with flyback lines and hum in sound.
• Volume varies (intermittently).
• Functions very well via the scart socket. No UHF VHF reception. Display on the screen is correct, white screen. (part of circuit diagram displayed)
• No line output funtion. OK at switch on.
• Distorted picture (line amplitude, linearity).
• Does not start up from standby, cracking is audible and appliance switches OFF, standby LED switches off.
• Line frequency drifts slightly.
• Bottom of raster is missing. Deflection incomplete.
• Standby light lights up for 2 seconds then goes off. Appliance does not start up.
• Picture jumps then stabilises in black and white always on the same channel out of all the channels available. (SCOTT - TS4451 information)
• Vertical lines are distorted horizontally. E/W equalisation can not be adjusted correctly.
• Raster weakened after a few mins and is reduced to a horizontal lines then TV goes into standby.
• No functions. IR01 does not accept reset.
• Primary power supply fails under load.
• No horizontal deflection. Audio OK .
• Occasionally no scanning is possible.
• Poor start up performance of the power supply.
• Picture is slightly displaced towards bottom of screen.
• Starts up then cuts out, starts up again every 10 secs and so on.
• Poor audio.
• TP29 and TL19 fail after operating for 1 hr. (picture attached)
• No horizontal deflection. Protective circuit trips. Standby light flashes. (with circuit diagram extract)
• Distorted audio. intermittently.
• Adjusting the bell filter: chassis.
• Occasionally sound and video drift on channel 64. Operation is good on the other channels.
• White dotted lines appear on left of picture in VHF/Band I reception.
• Does not start from Standby or switches off.
• Power supply transistor S2000AF blows after operating for one hour. (part of circuit diagram displayed)
• No colour (after a while).
• No voltage on LP36 in secondary side.
• One colour missing.
• Amplitude and/or alignment vary intermittently.
• Chroma fault. Intermittent coloured interference lines.
• Normal sound, white screen, no picture, flyback lines. Impossible to reduce the brightness.
• Power supply S2000 blows approx every 10 hours. (service info for SCOTT -TS4451)
• At switch on slight line crackling and no start up. Red LED ok. (+ extract of circuit diagram)
• TV does not start up or stops.
• Instructions for repairing the PSU. (with circuit diagram extract)
• At switch on everything seems to be starting up well, EHT is established then 3 secs after the line oscillation is interrupted. 7V is now 13V and stays there. TV is apparently in stand by. (+ extract of circuit diagram) (SCOTT - TS4451 information)
• The PSU runs continuously.
• Commands performed with a delay.
• Tripping (intermittently).
• No EHT. Black screen.
• No picture. Excessive brightness. Retrace lines.
• Teletext clock stops. Each 5cm high part of the picture is missing.
• White screen. Audio OK .
• TV switches off when changing channel and with great variations in the beam current.
• Occasionally TV does not start up and remains in standby.
• No function from RC, ok from front panel. RC receiver ok. (+ extract of circuit diagram)
• Black, horizontal lines in picture. (with circuit diagram extract) (TS4451 tips)
• The appliance goes to secondary safety mode. (with circuit diagram extract)
• TP29 is destroyed after 30 minutes.
• No reception. (with circuit diagram extract)
• At the start of production of the new IKC2 chassis, in TVs not fitted in series with teletext, the following components have not been fitted.
• Too much EHT.
• Switches to standby. in PB.
• Poor start up of PSU. Occasionally starts up but sometimes does not, especially when warming up. (part of circuit diagram displayed) (SCOTT - TS4451 information)
• Horizontal bars on picture during operation. This is accompanied by an audible signal distorting the sound.
• Audible start up when cold. Switches off after 1 sec. After switching on again, only standby LED is lit. No other functions. Raster is defective (with circuit diagram extract)
• Short line pulses on the line output collector and then dead. (+ extract of circuit diagram)
• Intermittent fault especially when cold. No vertical stability. No luminance for a few seconds then everything OK.
• Intermittently increases and decreases in size both width and height. (TS4451 tips)
• Line scan transistor is in S/C.
• No vertical and horizontal amplitude. Picture shifted downwards. (picture attached)
• Dim picture.
• E/W correction cannot be changed. (TS4451 tip from SCOTT)
• Buzzing and chirping, then switches to standby.
• No picture. Audio OK . (service info for SCOTT -TS4451)
• Modification to improve AGC adjustment. (TS4451 tips)
• Contrast average value is too high. (extract of circuit diagram attached) (SCOTT - TS4451 information)
• Grey screen. No audio. OK via SCART .
• Switches to standby (after start-up). No RC functions. (extract of circuit diagram attached)
• Vertical foldover.
• Slow start-up.
• Starts up at switch on with the red light lit. Impossible to go into standby via the control panel or RC. (+ extract of circuit diagram)
• Curtain effect.
• There is little light.
• No synchronisation. in TXT.
• Tripping. Standby LED flashes .
• Crackling in the speaker at start up and at switch off including standby. Slight noise in the speaker in standby. Occasionally trips at start up.
• Intermittently switches off and on when changing channels or when picture has high beam current content.
• The display is incorrect. (TS4451 SCOTT repair tip)
• Small flyback line at top of screen on left side.
• Noise bar. after a few minutes.
• Little or no light.
• Humming on sound and the screen is dark. The appliance goes to stand-by after 2-5 minutes.
• No function. Reset does not react.
• No voltages at the secondary of LP36. Standby light on.
• Only a palm high picture at bottom of screen.
• Us is too high at 121Vpp instead of 52Vpp.
• Ignition on the EHT (flame). (part of circuit diagram displayed)
• Line transistor blown after a few hrs.
• Vertical lines run over the top part of the screen. (TS4451 tips)
• After a short time the US voltage increases so that the TV cuts out. (TS4451 tips)
• Occasionally static discharge. (TS4451 SCOTT repair tip)
• Incorrect speed of power supply. (extract of circuit diagram attached)
• No horizontal deflection. (+ extract of circuit diagram)
• The power supply starts up jerkily but occasionally does not start up at all. (with circuit diagram extract)
• White line. in the centre.
• 10cm frizzy lines in top part of the picture. (extract of circuit diagram attached)
• Power supply transistor TP20 blows and so does the mains fuse FP01 after operating for a few mins.
• TL19 (S2000AF) fails repeatedly.
• Can not be switched on from standby via RC.
• Impossible to change standard, remains in SECAM. Picture inverted in PAL.
• No audio. via tuner. No picture. via tuner. OK via SCART .
• No -1V at base of TP29.
• The screen insertions are unsynchronised, if no aerial signal is present.
• TV01 and TV02 are in safety mode.
• Switches to protection mode (after start-up). (+ extract of circuit diagram)
• Amplitude varies with the voltages.
• In breakdown mode with 2.2K, pin 20 and 32 have been removed, EHT but 300V pulsates instead of 600 or 700V. 100V at the start of video but everything collapses if you refit DL13. (TS4451 tips)
• TV01 blows after operating for 30 mins.
• Power supply pumps when cold, red light flashes.
• Pale grey screen with fine horizontal line and hum at start up of the line transformer. (extract of circuit diagram attached)
• Faint picture because CRT was defective.
• Adjusting the R-Y demodulator: chassis.
• Switches off immediately without becoming bright. (part of circuit diagram displayed)
• Occasional crackling effect on the video signal.
• HT oscillates and appliance stops.
• At start up functions normally for 20 to 50 secs then goes into standby prematurely. (picture attached)
• Switches off and on again at random.
• Dark picture. after a while.
• Memory loss with Canal Plus decoder.
• Blurred picture which occasionally becomes normal again.
• Excessive green.
• Fluctuations of the picture according to the video content.
• Switching off fault of the spot.
• Switches off when changing picture and channel and then starts again. (with circuit diagram extract)
• Vertical fault. Black screen.
• Vertical lines run over the whole screen.
• At switch on starts up with severe noise in loudspeaker then stops and remains in standby.
• No start up. No standby. (with circuit diagram extract)
• Only a horizontal line in middle of picture.
• Dark picture. Audio OK .
• PSU chirps if appliance is switched on via power switch. After approx 5 secs everything is off.
• When playing back a cassette previously recorded by the same VCR, colours may be lost or blue flash interference due to the PAL pulse of the TV being triggered. (service info for SCOTT -TS4451)
• PSU fails immediately after start-up.
• TV only starts up very rarely, when it does start up, RL26 smokes, the deflectors heat up and smoke, distorted picture and the colours fade.
• Fuse FP2 (630mA) blows.
• Power supply pulsates intermittently when cold or warm.
• Power supply fault. Remains in standby. (picture attached) (service info for SCOTT -TS4451)
• Appliance switches off and switches on again, changes channel and there are great variations in the beam current.
• Pulsates if TV is started up after being put into standby.
• Incorrect oscillations on line BU (S2055).
• Slight raster distortion at top or bottom of screen, depending on defective diode. (TS4451 tips)
• White horizontal line at top of screen. Rest of screen is black.
• Standby light remains on at switch on. No picture, no sound, no function from RC or control panel. Slight noise from PSU as if TV trying to switch on.
• Switches on but no user controls from front control panel nor from RC. Does not even switch to FF.
• Does not find channels or finds one channel tuned incorrectly.
• Bright picture. Flyback lines.
• No picture, only three lines two thirds of the way down the screen. Goes into SAFETY mode after 1 min. (extract of circuit diagram attached)
• Position of RA13 and RA15.
• Shuts down. at start-up.
• No start up except at a certain temperature. Standby ok. (+ extract of circuit diagram)
• Vertical foldover at bottom.
• White picture with stripes. Switches off after a short while. (service info for SCOTT -TS4451)
• TP29 has a short circuit and FP01 blows after a short time.
• Vertical amplitude is too low.
• After changing FBT which sparks, the very high tension is ok. No light on the screen even when forcing G2 44469905.
• Comes on for a short time.
• White stripe at the top of the screen. It is 1cm high and not as wide as the screen. No picture.
• Vertical lines. (picture attached)
• No sound or picture. Slow beat of the power supply each second. The light flashes. (extract of circuit diagram attached)
• When warm picture and sound increase then switches into standby. (picture attached)
• No start-up. Front LED lights up then goes off.
• After a few mins switches to standby. After some time can be switched on again from RC. (with circuit diagram extract)
• No 30V on pin 5 of tuner in PAL SECAM. (with circuit diagram extract)
• To improve operation of mute circuit.
• Picture with red as the predominant colour and flyback line apparent on the screen.
• Defective picture, poor colour and white dot at switch off.
• No sawtooth signal on raster. Horizontal bar appears at bottom of picture.
• Hyperband re-fitting.
• Picture and sound hang up.
• At start up there is a power supply fault. TP29 must be replaced. After this the picture lacks vertical and horizontal amplitude. Reduced picture which has shifted to the bottom of the screen. (extract of circuit diagram attached)
• The appliance has a dark picture.
• Black screen. via RF output. OK via SCART .
• Poor audio (via SCART).
• Attempts to start then smoke appears.
• HT whistles for a short time. Standby LED remains lit. Raster is defective. (extract of circuit diagram attached)
• PSU does not strat.
• No audio. when cold.
• No red.
• At switch on colour is delayed. (SCOTT - TS4451 information)
• No start-up. LED is red .
• Does not start up. Standby lit. Slight motor noise in speaker.
• Occasional memory fault when appliance is stopped by the general switch. When switched on again, appliance is deprogrammed. (part of circuit diagram displayed)
• Collapses at switch on. Functions normally when first switched on
• Occasionally changes channel by itself, channels run through or the function band appears. Occasionally when in standby, the TV switches on all by itself. (+ extract of circuit diagram)
• White screen with flyback line or no brightness.
• Programmed on channels but still only snow. Selector does not react on channel inputs.
• In VHF range (channel 5-12) white flecks and grey haze in the picture.
• High voltage transistor fails repeatedly.
• At start up, starts up then stops. Standby light remains lit.
• Picture shows green, red and blue lines and the raster rattles audibly. (TS4451 SCOTT repair tip)
• No voltage at secondary.
• Black and white picture. No RGB on 41, 42, 43 of IV01. 200V on DL11 is correct.
• No start-up (intermittently). (part of circuit diagram displayed)
• White field with flyback lines.
• Random loss of station memory when CTV starts up. (service info for SCOTT -TS4451)
• No audio (intermittently).
• CTV blown, if connector BF01 remains connected. Vertical scanning line is at bottom of screen.
• Tube tries to switch on then switches off. (with circuit diagram extract)
• No function either from control panel nor RC. No OSD.
• Arcing with sparks and cracking sounds.
• Occasionally loss of station memory. When warm stations run through from 1 to 39 without loss of station memory.
• No signal.
• Switches to standby (after start-up). (extract of circuit diagram attached)
• Arcing of line transformer and focus G2. Picture now has a large horizontal foldover from top to bottom of screen.
• S2055 AF in the line blows after operating for a few hours. (with circuit diagram extract)
• No start up of PSU. Low ticking. (with circuit diagram extract) (TS4451 tips)
• Vertical compression and very dark picture, more on the right than on the left.
• Intermittently PSU doesn't start up via RC and mains.
• TL19 in the line output stage is defective. (picture attached) (SCOTT - TS4451 information)
• Picture width and height twitches intermittently, thereby noise or chirping can be heard in SM transformer. (TS4451 SCOTT repair tip)
• Faint sound although correct. (service info for SCOTT -TS4451)
• After appliance has been moved, strange colours. Red has become blue and screen is affected by a mauve halo.
• No raster deflection. No picture, only vague light in background. Looks like coloured spot at bottom of picture. (TS4451 tips)
• DL13 is S/C. (TS4451 SCOTT repair tip)
• Saving new basic adjustments such as brightness.
• Picture with predominant yellow/green.
• After an extended operating time TP01 (BUT12A) fails. (extract of circuit diagram attached) (service info for SCOTT -TS4451)
• Twinning lines at top. Vertical distorted. Becomes better after warmed up.
• East/West amplitude changes with the beam current.
• Horizontal line. at bottom.
• Screen blank. Dark picture.
• TDA8178 heats up too much and blows.
• Trips. after a few minutes. (service info for SCOTT -TS4451)
• Shuts down. intermittently. (extract of circuit diagram attached)
• Switches to protection mode (after a few seconds).
• Dark screen. Stretched vertical lines.
• Slight raster scanning in the middle of the screen.
• After a few minutes the screen goes black and motor boating occurs.
• Four vertical bands on top of screen.
• No synchronisation. (with circuit diagram extract)
• Switches off by itself. after a few minutes.
• PSU does not always start up (start up difficulties). (extract of circuit diagram attached)
• Power supply does not go beyond 100V.
• Blows intermittently.
• No NS correction.
• Dark picture. (picture attached) (service info for SCOTT -TS4451)
• S2000AF blows each time appliance is plugged in. (part of circuit diagram displayed)
• The TV starts up. A white line appears at the top of the screen. System tension: voltage is approximately 58V, and the other voltages are low.
• Standby LED flashes up at second intervals. Only functions at a reduced mains voltage. (extract of circuit diagram attached)
• No colour (intermittently). (picture attached)
• The channel nos run through, no sound or picture but it works in video. (TS4451 SCOTT repair tip)
• Switches to standby (after a few seconds). (extract of circuit diagram attached)
• Dark screen.
• Chroma fault occurs although the tuning discriminators and the grey scale function correctly.
• At switch on, front LED flashes irregularly or remains fixed. (part of circuit diagram displayed)
• Poor E/W correction. Adjustment of the amplitude is ok. (part of circuit diagram displayed)
• Intermittently blows chopper transistor.
• Unstable vertical scanning with foldover in the picture. (part of circuit diagram displayed)
• Blue tinge in picture in SECAM, ok in PAL. Black and white picture ok. (service info for SCOTT -TS4451)
• Crackling in picture and sound, even in VHF.
• No start-up. (picture attached)
• Blows fuses immediately after switching on.
• Vertical stability fault. (+ extract of circuit diagram)
• Dead. (picture attached)
• At switch on, standby light flashes once and cuts out.
• Starts up then switches off. Remains in standby when cold.
• S2000 blown.
• After 5 mins a noise like rapid crackling occurs at the scanning level. Noise disappears if picture is misframed upwards. (extract of circuit diagram attached)
• Functions for a few secs then goes into standby. Channel change does not occur. (extract of circuit diagram attached)
• Blows at switch on. (extract of circuit diagram attached)
• Line transformer is often defective. (picture attached)
• PSU attempts to start up at intervalls. LED lights.
• Arcing in picture. at top.
• Switches to protection mode. when cold.
• Faulty OSD.
• No OSD display. Sound cuts out at channel switch-over. Sound OK at start up. When channels are changed using TV front control keys, channels roll over even when key released.
• Random coloured flash.
• Memory loss or random deprogramming of uP.
• Dead (intermittently). (SCOTT - TS4451 information)
• EHT collapses.
• Rainbow effect on top of screen.
• Switches to protection mode. after a few seconds. (service info for SCOTT -TS4451)
• Remains in "burst" mode with a hum noise in LF. (TS4451 tip from SCOTT)
• No start up of PSU, sometimes intermittently.
• Picture is green, red and blue with flyback lines.
• At switch on there is a noise and light goes out. (extract of circuit diagram attached)
• At switch on, the appliance goes to stand by. After trying to start several times the TP19 and TP29 are damaged.
• Starts nomally but if appliance stops after heating up for some time, TV flashes and may take a long time to start up again. (with circuit diagram extract)
• Under certain conditions (static discharge etc.) may revert to factory set up mode.
• The lamp is weak. (TS4451 SCOTT repair tip)
• Blue flash in Secam.
• S2055 blows. (TS4451 tips)
• Crackling effect on video and echo.
• One start-up attempt with HV,then switches to standby.
• Replacing the TL19.
• No voltages on the secondaries and no light.
• Sound distorted, especially by stereo.
• S2000 fails.
• Line-BU TL19 (S2000AF) fails immmediately after start-up.
• Switches off by itself. when changing channels. (extract of circuit diagram attached)
• Interference bands at the bottom of the screen.
• Wavy picture.
• Grey adjustment: picture tube board.
• Picture has increased at the top and reduced at the bottom of screen.
• White screen. Sparks between pins 6/7.
• No brightness and incorrect OSD. OSD background is bright red. (part of circuit diagram displayed)
• Occasionally horizontal tearing and horizontal stripes. Same faults via aerial and in scart.
• Three white lines at the top of the picture, nothing else. (part of circuit diagram displayed)
• Only a horizontal line at bottom of picture.
• No reception. OK via SCART .
• Thermal R349 O/C every 3 or 4 months. (picture attached) (service info for SCOTT -TS4451)
• Occasionally fails for a short time (Occasionally does not function for days). (+ extract of circuit diagram)
• PSU does not always start after switch on via front control or RC.
• No start up. Faint whistling on loudspeaker.
• No vertical deflection. (part of circuit diagram displayed)
• Line transformer starts up then stops.
• S2055 defective after switch-on.
• No power supply regulation. Standby LED flashes red every single second.
• Vertical jitter. (service info for SCOTT -TS4451)
• Dark screen with short bright flashes.
• No picture. Loss of one or more colours. (SCOTT - TS4451 information)
• Does not change channels.
• Dark screen except for a 3cm high white streak towards the top of the screen. (+ extract of circuit diagram)
• Intermittently blue picture with traces of blue flyback lines.
• E/W correction IC (TDA4950) blown each time.
• Picture and sound distorted. Hum in PSU.
• Zigzag pattern across whole screen.
• FP01 and TP29 blow at Power On. (extract of circuit diagram attached)
• No TV picture and humming from loud-speaker.
• S2000AF in power supply is defective. Functions OK for a week, then S2000AF and primary fuse defective. (with circuit diagram extract)
• At switch-on, vertical centering of picture offset by 2 cm towards the top of screen.
• Horizontal white line. at bottom.
• Vertical line wavering at left hand side. (with circuit diagram extract)
• Switches on. Red LED lights, but turns darker after start-up. No start-up via RC. (with circuit diagram extract)
• Snow on the screen.
• Passes all channels without stopping.
• Picture with flyback line on one colour.
• Loses programmes from memory at irregular intervals.
• No raster signal on pin 31 of IV01.
• Only snow. Appliance can be controlled with RC. (TS4451 tips)
• Modification of connector on TXT IKC2-VT4P.
• The tinge varies.
• Switches to protection mode. intermittently.
• Appliance switches off, when screen changes and starts up right away.
• PSU only works in Burst mode, the red LED does not light up. (with circuit diagram extract)
• Power supply is dead, stand-by mode does not function. (SCOTT - TS4451 information)
• Impossible to display the PAL SECAM standards. (part of circuit diagram displayed)
• To improve IF response.
• Power supply pulsates every single second. Standby LED flashes.
• The grey scale is incorrect.
• Remains blocked on CH15 and PR8 at start up. Occasionally CTV functions normally.
• Snowy picture. No reception in channel search.
• Compressed vertical. Extremely dark picture, more on the right than on the left. (TS4451 tips)
• Distorted picture. Strong streaking.
• Repeated failure of chopper transistor TP29 (BUH515). (picture attached)
• PSU does not always start after switch on with the control panel or the RCU. (extract of circuit diagram attached)
• Fuse cuts out without apparent reason.
• Red picture. Flyback lines.
• Excessive vertical size.
• Hiss in audio. in UHF.
• No horizontal synchronisation. (service info for SCOTT -TS4451)
• Power supply hiccups. (part of circuit diagram displayed)
• Channel programming and saving in SECAM mode.
• No OSD. (picture attached)
• Picture starts off very bright and after few secs goes dark.
• Blue tint in picture intermittently.
• Starts up one time out of ten then functions ok with a nominal voltage. The rest of the time it collapses. Start up and operation ok with the variac.
• Vertical line. (extract of circuit diagram attached)
• Very white lines at the top of the screen.
• Standby LED flashes bright and dark.
• Dark screen and the RL11 is open circuit.
• No start up. No display. No standby LED light. (with circuit diagram extract)
• No function, standby point is not visible.
• PSU pulsates every second and the standby light flashes.
• Maximum luminance.
• No scanning.
• No colour during Canal Plus.
• Picture modulation in power function.
• Starts for one sec and goes into standby with a hum in the loudspeaker.
• Hum on sound and dark screen. Goes into standby.
• Only noise on screen, screen menu cannot be superimposed. Appliance does not react to the RCU or to control panel commands.
• No or intermittent start-up. when cold.
• How to remove protection.
• Use of the lithium battery.
• No tuning, maximum tuning voltage.
• Noise in the HP power supply. The appliance goes to stand-by and starts up again. Dark screen and after 3 minutes the appliance returns to stand-by.
• Excessive horizontal size. (+ extract of circuit diagram)
• Line BU clicks.
• Sound ok in slow motion. A hum can be heard if you increase the power.
• Dark picture. No audio. OSD OK .
• Channels run through, sound whistles and there are lines if picture present. (service info for SCOTT -TS4451)
• Black lines on the picture. Poor sync.
• No picture. OSD OK .
• Goes into standby after a few secs. Appliance and EHT start up well at switch on.
• Intermittently stripe in lower picture part.
• Vertical lines are jagged.
• Picture has vertically shifted with approx. 2cm towards top after start-up. Picture ok after approx. 10 mins.
• Stuck in standby. Red LED dim. Possibly intermittent. (part of circuit diagram displayed)
• Dark screen. Blue 1cm band at the top of the screen. No access to functions of: volume, channel, standby (no sound or picture). (extract of circuit diagram attached)
• Flickering at switch on. (with circuit diagram extract)
• When pressing the switch the standby light comes on a little then goes off. (with circuit diagram extract)
• When switched on, the standby light lights up but the power supply is tripping. (+ extract of circuit diagram)
• TV functions, thermal tube noise on the screen but no picture. RCU does not work. Dark display, a channel is displayed, programme nos run through and stops on AV. No sound.
• No contrast control.
• Dark picture. after warm-up. No picture. after a while.
• Very dark and unstable picture at start-up but becomes normal again after quarter of an hour.
• Goes into protective switching. (picture attached)
• PSU starts for a few secs then collapses while pumping on the standby point.
• Regulator fault. (+ extract of circuit diagram)
• No TXT. (+ extract of circuit diagram)
• PSU switches off after start-up.
• FBT is started up by a signal but appliance does not start. In standby mode.
• Menu display is in a wrong language.
• Trapezoid picture.
• Control board CDI 2000.
• No luminance, white is black.
• No start-up from PSU.
• Power supply goes to standby and standby light is lit up.
• Occasionally the TV pulsates at start up.
• PSU function description. (SCOTT - TS4451 information)
• Line transistor blows after 10 mins. DL11 98V instead of 200V.
• White screen in scart and no sound. Picture ok via tuner. Displays programmes and sound level etc.
• Replacement kit of thyristor ESM740/G1/G2.
• Picture position shifts vertically by approx 2cm towards the top of the screen intermittently. Position returns to normal after approx 10 mins.
• Functions for a few secs then goes into safety mode. Functions without the raster deflector. (TS4451 tip from SCOTT)
• Distorted picture. No adjustment possible .
• White screen, no picture. Sound ok on all channels. Same via scart.
• No line oscillation. (with circuit diagram extract)
• Switches on but switches off after a few mins. Intermittently switches off immediately.
• No contrast.
• The appliance switches on at random when the remote control is used.
• New transformer, TV starts up and the US voltage increases to 122V instead of 140.
• No start-up from standby. after warm-up. (picture attached)
• Tripping. Power LED lit . (picture attached)
• TV starts up for a few seconds with a jerky noise then stops and so on.
• Luminance streaks and flyback lines.
• Distortion, white flags on the left side of the picture. Sometimes negative picture. (with circuit diagram extract)
• HV starts up for 3-5 secs then shuts down. (part of circuit diagram displayed)
• Fuse and TP29 fail repeatedly. (TS4451 tip from SCOTT)
• TP29 fails after switch on. (TS4451 tip from SCOTT)
• Shuts down (at start-up). (part of circuit diagram displayed)
• Dull picture. No contrast control.
• Production mode.
• Trips erratically.
• Poor sound via loudspeaker, even when adjusting volume at maximum.
• No start up. No U1 47V, U2 5V voltages.
• No sound with a Nintendo game. Game functions on another TV. (part of circuit diagram displayed)
• Occasionally loud crackling from the housing.
• Intermittently trips off for approx 1 sec.
• Appliance switches off if slightly shaking chassis and then starts up immediately. Occasionally drifts off tune (only snow on screen).
• The appliance fails, no picture, no sound, base raster or horizontal lines.
• Shut down protective circuit.
• Channels scroll. Functions if control panel plate on front panel is disconnected.
• Distorted picture.
• No audio. No picture. Squealing from PSU. (+ extract of circuit diagram)
• Starts up but stops 2 secs later.
• No OSD via RC or front controls. Screen is lit, snow present. No sound or picture. (with circuit diagram extract)
• Occasionally small horizontal black line at the top of the screen and line transformer whistles slightly.
• Channels run through and do not stop.
• Mono sound is OK. Stereo sound scratches .
• Transistor TP 29 short circuits after working for some time.
• Transistor TP29 (S2000AF) fails repeatedly. (+ extract of circuit diagram)
• Stuck in standby. (+ extract of circuit diagram)
• No picture, only snow. in PIP.
• Snow in picture.
• No stations found in search. Seems to have poor power supply filtering.
• Field centering off-set by 2cm toward top of screen when first switched on. (extract of circuit diagram attached)
• Standby LED switched on, becomes green for an instant. No start up. Power supply sends pulses. (TS4451 tips)
• Picture goes into PAL occasionally but the sound remains normal. Picture returns to normal after a few secs.
• Vertical scanning line is at bottom of screen and CTV blows.
• At start up standby point lights up and hum. (picture attached) (SCOTT - TS4451 information)
• Distorted audio. Distorted picture.
• No channels.
• Regular ondulations on the vertical lines of a test picture. (with circuit diagram extract)
• Occasionally after switch on vertical centering is shifted up approx 2cm. Goes into normal position after approx 10 mins. (with circuit diagram extract)
• Blue fails - occasionally blue flyback lines visible.
• 1 flyback transformer pulse then standby. If the picture appears, one time out of five there is crackling in the transformer then standby. (service info for SCOTT -TS4451)
• Picture vibrates in the rythme of sound. (service info for SCOTT -TS4451)
• No PAL colour, either via aerial or via scart.
• Picture slowly darkens. The cathode voltages are ok.
• B/W picture in PAL. (TS4451 tip from SCOTT)
• All secondary power supply voltages are doubled.
• Tripping. after a few hours. (part of circuit diagram displayed)
• With high contrast PSU trips then starts again. Occurs randomly. (part of circuit diagram displayed)
• Horizontal black bars appear on screen. Parts of TXT picture are missing.
• Standby LED flickers and PSU does not start up correctly.
• Power supply pumps every single second.
• Horizontal size varies. depending on picture content.
• Switches to standby.
• Grey scale incorrect. Yellow-green picture. High voltage on the blue cathode (170V). Voltage on the red cathode, as well as on the green, is normal (135V).
• White screen with a line in diagonal. Audio OK.
• No picture, only snow. (+ extract of circuit diagram)
• Cuts out and then starts up from time to time after working for several hours.
• No power supply on the uP.
• Excessive brightness. Flyback lines. (extract of circuit diagram attached)
• Vertical line. in the centre.
• Blurred picture, focus pot does not work.
• Fuse (1.6A) blows intermittently. (part of circuit diagram displayed)
• Intermittently black band in the middle of the screen then increases in size to fill the whole of the screen. (with circuit diagram extract)
• No HV. (with circuit diagram extract)
• Unstable frame linearity.
• No colour from aerial or scart. IC TA8559CN has been replaced. Wave peaks at MP output are correct.
• No functions. via tuner. OK via SCART .
• Appliance in burst mode. No standby light.
• PSU doesn't start up intermittently.
• No start-up. intermittently. PSU pulsates.
• Poor picture after 15 mins from start-up. Audio OK. (with circuit diagram extract)
• Line BU blows when switching on CTV.
• No picture. via tuner. OK via SCART .
• With S2000 when warm, PSU cuts out, starts again, cuts out etc. (+ extract of circuit diagram)
• Switches to standby (after a while). (+ extract of circuit diagram)
• Secondary protective circuit TV01 and TV02 disconnects intermittently.
• Picture shifted vertically.
• Tripping. after a few minutes (intermittently).
• At start up standby light comes on then goes off straight away. (picture attached)
• No channel reception after changing tuner and IF.
• No switch on. Crackles faintly, no LED lit.
• Incorrect picture height. Black 5cm bar at bottom, black 2cm bar at top of picture.
• In playback, especially with prerecorded cassettes the picture oscillates horizontally or is distorted like a flag in the top part of the screen.
• No videotext mode.
• FBT is s/c twice a year. On collector TL19. 1200V instead of 1000V. CL21, CL22, CL24, CL23 replaced but fault persists. US adjusted to 143V. FBT 470034-81 CTV TA6326.
• Sometimes switches off by itself or does not switch on.
• Power supply fuse blows at switch on. Everything seems ok.
• Snow in picture. in UHF.
• White screen with no snow. Normal sound. OSD functions. Same fault via scart. OK in RGB.
• Dead. LED briefly flickers twice.
• No functions. (with circuit diagram extract)
• Dead. Power LED lit . (with circuit diagram extract) (TS4451 SCOTT repair tip)
• Picture with black bands and sound whistling/tuner drift. (extract of circuit diagram attached)
• No direct time insertion. (extract of circuit diagram attached)
• Cuts out intermittently. Light becoming white before turning red. No start up with RC. (part of circuit diagram displayed)
• Colour fault.
• Picture only in top part of screen. (with circuit diagram extract)
• Wavy lines.
• PSU does not start up correctly. Standby LED flickers
• Siren noise in speaker.
• After operating for some time the channels begin to run through. Nothing occurs when the circuits are cooled down.
• Starts up then stops immediately afterwards when ON/OFF switch pressed. (picture attached)
• Switches to protection mode (after a while). (extract of circuit diagram attached)
• Switches to standby. intermittently. (+ extract of circuit diagram)
• Horizontal collapse. (with circuit diagram extract) (TS4451 tip from SCOTT)
• White picture and flyback line. New FBT. S2055AF replaced by S2000AF which heats up and blows after a min.
• No start-up. Red LED blinks. (+ extract of circuit diagram)
• No volume control via RC.
• Sound but no picture. White screen with flyback line.
• Chroma decoding.
• EHT S20000AF blows every three days.
• Adjusting the NTSC(3,58MHz) colour carrier trap: chassis. (TS4451 tips)
• Coil LG08 (situated in the corner near the EHT) burns. (extract of circuit diagram attached)
• TT switches on automatically.
• Low brightness.
• US voltage is 57V. If you unplug pin 3 from the line stage transformer the voltage returns to 113V. Line stage transformer has been changed. (TS4451 tips)
• Loud noise when switching on TV via mains. Can be intermittent. (TS4451 tip from SCOTT)
• Starts up three times then goes into safety mode. (picture attached)
• Horizontal output transistor fails after start-up.
• No picture. at bottom.
• Dead. Intermittently OK from cold.
• No switch on at start up. Standby light is off. At stop light comes on weakly then goes off.
• Line transistor S2000AF heats up then fails. E-W geometry ok.
• Resistor RT04 on the picture tube base blows repeatedly. (part of circuit diagram displayed)
• Picture flickers with coloured OSD (eg from a VCR).
• Setting the main voltage (Usyst. 110V): Chassis. (extract of circuit diagram attached)
• Starts up with difficulty. Line transformer only starts up after several attempts.
• No start up. LED flashes irregularly, switches intermittently to standby. (TS4451 SCOTT repair tip)
• No TXT (intermittently).
• No voltage.
• Line transformer starts up three times then nothing. LED stays red.
• White stripe on the left side of screen.
• Pumps.
• No start-up (after warm-up).
• TV starts up for a few secs and leaves a motor noise in the speaker. By disconnecting DL13, the appliance starts up again.
• Power supply voltage: 15V: 8V; 140: 80V. The same with the line transformer disconnected. (TS4451 tip from SCOTT)
• Picture instability depending on sound.
• Stops for 10 secs after 10 mins. (extract of circuit diagram attached)
• No bottom of raster. Incomplete deflection.
• No start up of line transformer and LED pulsates slightly.
• On the CRT board TT33 is S/C for the second time in a month.
• OSD fades on all the colours.
• Small screen, only inner side lights up.
• Poor scan. (service info for SCOTT -TS4451)
• When switching off the appliance in standby and with the mains switch there is a loud crackling in the speaker. (+ extract of circuit diagram)
• No functions. Standby LED is not visible.
• Tripping. Red standby LED dimming on and off. (with circuit diagram extract)
• 3cm white line at top of picture. No sound and no video, not even in scart. Green LED on.
• Volume becomes louder after few mins, cannot be adjusted.
• Picture jitters. in TXT. (+ extract of circuit diagram)
• No picture. via SCART. Audio and HV OK .
• No start-up. LED blinks .
• No line drive.
• Poor sound quality (mono appliances).
• Noise bar. at bottom.
• Starts up then goes into protection mode. Standby light on. Sound OK but no picture. Bluish screen with shadows.
• No colour (when switching).
• No start up. Standby LED lights up. Cannot be started with the RC. (+ extract of circuit diagram)
• Reduced horizontal deflection. (TS4451 SCOTT repair tip)
• Weak colour.
• Stops intermittently. LED remains red. TV does not start up again with the channel button. Necessary to press the standby button then the channel button. (part of circuit diagram displayed)
• Power supply starts up 3 times at switch on then switches off. No picture or sound. Red LED is lit.
• At start up snowy screen with no reception. When pressing the programme keys the numbers run through continuously. No sound.
• Blows intermittently and switches on again. (with circuit diagram extract)
• Power supply stops.
• Power supply pulsates after a frame fault.
• Starts up in standby, perhaps when cold. Standby display ok.
• Goes into safety mode for no apparent reason, after operating for 30 mins. Starts up again from the switch.
• No picture. No sound. Insufficient width. Picture has a 5cm band at top of screen.
• No picture scanning. (SCOTT - TS4451 information)
• No start-up from standby. (part of circuit diagram displayed)
• Sporadically loses station memory. Analog values available, all program sites are on CH02.
• Only noise. (service info for SCOTT -TS4451)
• Lines appear at top of screen or interference then goes into safety mode. At present it goes into safety mode each time after 2-3 secs. (+ extract of circuit diagram)
• The picture blows.
• When 120V at variac, UL1 reaches 280V.
• Remains in standby or goes to standby intermittently.
• Power supply chopper blows.
• All the secondary voltages are low.
• Line BU blows at once. (+ extract of circuit diagram)
• Attempts to start, then suddenly stops.
• Remains in standby. Occasionally starts then goes into standby after 5 mins.
• Dark stripes in picture by bright picture content. Volume display jumps. Beam spot at switch off.
• Set is dead but not tripping.
• Works for 10 secs then goes into standby. TV ok after switching off then on again.
• Screen is dark. Slight noise from the line output transformer.
• Picture at the bottom. No contrast.
• Goes into SAFETY mode and very slight hum in LF.
• Horizontal line on a third of the picture towards the top. (extract of circuit diagram attached)
• Colour saturation. (TS4451 SCOTT repair tip)
• Picture is OK although raster has moved up. (+ extract of circuit diagram)
• By pressing the buttons PROG + and - on the front panel the channel nos run through continuously. When disconnecting the control panel, difficulties in programming a channel. (picture attached)
• PSU starts up. Whistling from speakers.
• Chopper goes short circuit; after replacement appliance functions correctly for approx 1 minute.
• Line transformer does not start up. (+ extract of circuit diagram)
• No functions. after warm-up. (TS4451 tips)
• No start up. Standby light comes on.
• Signals reduced to quarter of their size and are distorted on TL19 after 3 secs from start-up. TL19 burns if left under load. (with circuit diagram extract)
• Scanning at bottom of screen.
• Green picture. No contrast. (part of circuit diagram displayed)
• Switches to standby. after a few seconds. (part of circuit diagram displayed) (service info for SCOTT -TS4451)
• No picture, light line under the picture tube. (+ extract of circuit diagram)
• Impossible to go into standby via the front panel or the RC. Starts up at switch on with the red light lit. (+ extract of circuit diagram)
• No 15V.
• Noise in speaker power supply. Goes to standby, starts up again and after 3 minutes goes to standby.
• Standby LED is still lit up. Horizontal white stripe. (part of circuit diagram displayed)
• The picture is smaller and at the bottom of the screen.
• Tuned to channels but only snow. Selector does not respond to channel input. (picture attached)
• Adjusting the PAL amplitude: chassis.
• Value of capacitor position CP11 (power supply). (extract of circuit diagram attached) (TS4451 tip from SCOTT)
• Intermittent goes into standby when changing channel, also sound goes up and down intermittently. (with circuit diagram extract)
• Reduced horizontal size.
• Shuts down.
• BU transistor TP29 blows again.
• US (110V 90º - 143V 110º) goes high after a few mins and TV trips.
• Vertical picture has shifted to top by approx 2cm at switch on. Picture OK after approx 10 mins.
• No picture. No sound. Switches off after 3 secs, remains in standby and has an afterglow fleck. (part of circuit diagram displayed)
• TV starts up well but with a lot of noise.
• No function. Initially LED indication OK.
• No start-up. Poor red LED.
• Picture breaks up and crackles on sound.
• Appliance works only in Burst mode. Red LED flashes.
• Switches to protection mode. at start-up. (TS4451 tips)
• Only a horizontal line at top of picture. (part of circuit diagram displayed)
• Channel memory loss approx every fortnight.
• Does not come on from standby, red standby light comes on. TV01 and TV02 in the protective circuit respond.
• Following a fault on the line there is no colour. Composite video is ok on 53 of IV01 but there is no RGB on 41, 42 and 43.
• BU 508A in the power supply gets too hot and goes defective after approx 5 minutes. (+ extract of circuit diagram)
• Trapezium distortion on top in picture, no functions. (service info for SCOTT -TS4451)
• EHT arcing noise.
• Vertical lines shake. In top third of the screen picture tearing is greater.
• Humming in speaker in standby.
• Starts up in standby. Standby display ok.
• Dead, no high voltage
• Picture is just at the top edge of the CRT if the vertical picture centering regulator is at the end position. The topmost lines are somewhat bent to the right.
• Blows on a white picture. Power supply as new.
• No light. Poor picture. Occasional horizontal tearing. If G2 is pushed in as far as it will go picture is better. Varies from 100 to 950V, 90 degree model, 114V on DP50.
• Does not switch on immediately when pressing switch, only after loudspeakers click 3 times and standby LED reduces brightness 3 times.
• Switches to standby (intermittently). (+ extract of circuit diagram)
• TL19 in line output stage is defective.
• Does not switch to standby.
• Sound has increased to maximum, after a moment, neither RC nor manual commands work. (SCOTT - TS4451 information)
• IR01 loses memory without any apparent reason.
• White line. at bottom.
• Goes into safety mode. Then switches on again for 4 seconds.
• No power supply secondary and no standby.
• After switch on, vertical centering is shifted intermittently upwards approx. 2 cm; it goes to normal position after approx. 10 minutes.
• Intermittently picture has no contrast and has a blue tinge. Sound ok.
• No sound and no video not even in scart. 3cm white line at top of picture. Green LED on.
• Programme number/AV symbol is permanently displayed.
• Line does not oscillate.
• Picture is displaced slightly towards top of screen.
• When switched on, line transformer attempts to start up then goes to standby. (with circuit diagram extract)
• Line in centre of picture.
• U/Syst voltage is 106V. (part of circuit diagram displayed)
• Appliance shuts down, then restarts. (with circuit diagram extract)
• Reduced vertical size. (part of circuit diagram displayed)
• CTV in standby one hour. After CTV does not start up from remote control or front panel. TV stops with the switch. Waits 30 mins. Starts to work again with switch. Functions ok with the remote control and front panel. (+ extract of circuit diagram)
• After switch on, PSU fails immediately. (+ extract of circuit diagram)
• Switches to standby. after start-up.
• White line. at top.
• Coloured tinge in picture. (TS4451 tips)
• Starts up when in standby, sometimes when cold. Standby display normal.
• No reception. in UHF.
• Line on the screen at the start. (part of circuit diagram displayed)
• At switch on, the tube flashes on the loudspeaker and stops. Negative picture.
• Chroma lacks green.
• CTV remains in standby. HT at 127V, 15V at 9V, 28 at 20.
• PSU only works in standby; no switch on. (+ extract of circuit diagram)
• Remains in standby. Hum in loudspeakers. (+ extract of circuit diagram)
• Goes into safety mode after operating for a few mins or hours. Necessary to wait 2 mins to start again with the RC. (+ extract of circuit diagram)
• Poor framing.
• Power supply BU blown at switch on.
• EHT whistles.
• Oblique lines towards the top of the screen and there may be a demagnetization fault and the demagnetization coil is ok. The PTC has already been changed. (service info for SCOTT -TS4451)
• Picture is displaced from frame towards top part of screen (approx 4cm). (service info for SCOTT -TS4451)
• White setting: picture tube board.
• In stand-by the light does not light up and the TV does not come on again.
• Standby light on, no start up of power supply.
• Does not switch on because the protection intervenes. Regular stand-by.
• When set to standard adjustments the contrast value is too high.
• No brightness, only colours. Only one colour in TXT (mostly green). Loss of certain colours.
• Goes into safety mode when first switch on.
• Mini raster scanning.
• White line, slightly tilted at the bottom of the screen. (TS4451 tip from SCOTT)
• Intermittently shuts down briefly (sometimes after two hours).
• The power supply pulsates at start-up.
• PSU fails immediately after switch on.
• Red LED is lit. Slight hum from the speaker. (part of circuit diagram displayed)
• Dark picture. Can only be slightly adjusted.
• Picture rolls. (extract of circuit diagram attached) (service info for SCOTT -TS4451)
• Black screen, alarm noise and orange LED.
• Does not start up. Ok if power supply is 110V. Normal scanning.
• No more line scanning possible. RL25 cuts out. (SCOTT - TS4451 information)
• Blank raster.
• At switch on, control panel LED remains red and flickers faintly.
• Fuse fails.
• Bright part approx 5cm high in the bottom quarter of the screen. The rest of the screen is dark. (picture attached)
• Switches to protection mode. after start-up.
• Vertical picture position shifts intermittently upwards approx 2 cm after switch on. It is OK after approx 10 mins.
• Picture is narrower. When making adjustments, the picture is wavy at the sides.
• Line power transistor S2055AF blows immediately after being replaced. (picture attached)
• Switches off immediately if vertical plug is pulled out. (with circuit diagram extract)
• The picture disappears, drifts then reappears for a few fractions of a second and then drifts again. A whistling noise can be heard when the picture reappears.
• No colour. (+ extract of circuit diagram)
• Line output S2000 fails after a while.
• Burst of EHT. (picture attached)
• At start up line transformer powers up then appliance goes into standby.
• Noise on loud speaker and the screen is black. The appliance goes to stand by after a few minutes.
• Starts up, works for 30 secs then goes into standby. Starts up again by itself after 2 mins.
• Switches off intermittently (often at programme switch).
• Intermittently switches off. Tapping effects.
• Crackling noise from power supply then dead.
• Power supply pumps. Standby LED flashes. (TS4451 tips)
• Protection mode activated.
• Does not pick up in UHF or in VHF.
• Smearing in high channels.
• Stuck in standby. Hum in audio. (with circuit diagram extract) (SCOTT - TS4451 information)
• Over-accentuated fizzling sounds.
• Slow start-up (when cold). (+ extract of circuit diagram)
• Line at the bottom of the screen then goes into standby.
• Horizontal output stage does not start up. (picture attached)
• Protective circuit starts up. Pulsates.
• Blows fuses.
• After some time, picture cuts out then returns immediately, standby light weakens but stays on, then CTV has a frizzy picture.
• TV stops and starts up again immediately. Standby light is on.
• Low supply voltages.
• PSU goes into safety mode.
• TV does not start up. TV01 not in safety mode.
• At switch on PSU goes defective.
• RL27 burnt.
• Occasionally there is no light at all.
• Unstable picture.
• Fails. (picture attached) (SCOTT - TS4451 information)
• TV starts up for a few secs with a jerky noise then stops and continues like this.
• Trips. (part of circuit diagram displayed)
• Only spot, no OSD and no channels.
• Stuck in standby. LED lit. .
• Picture for 30 secs then white screen.
• Switches off by itself. at start-up (when cold).
• Picture is at the lower picture edge and in time becomes a line. (with circuit diagram extract)
• Adjusting the UG2 screen grid voltage: chassis.
• Blank screen.
• Standby LED lights up and TV switches on, then 2 or 3 lines across screen and appliance switches to standby.
• Picture shrinks and a white band appears at bottom of screen after a short period of time. (service info for SCOTT -TS4451)
• Shuts down (intermittently).
• TP29 blows occasionally at start up or after operating for some time.
• Does not start up. Remains in AV. When in standby, whistling from speaker. (extract of circuit diagram attached)
• Switches to protection mode. (picture attached)
• Picture is somewhat noisy.
• Vertical rainbow zones over the picture right over the width of the screen. Intermittent fault.
• After clicking and tripping a few times, power supply remains blocked in standby at switch on.
• No picture or OSD information. RC and front panel do not function.
• After switch on power supply pulsates three times.
• Line stage does not start up. (picture attached)
• Grey screen, no sound, no video in scart output. OSD ok.
• No functions. Standby LED lit .
• When the focus pot is varied the brightness varies after a few minutes, the picture turns dark.
• Adjusting the audio trap: chassis.
• HT starts up for 2 secs then TV goes into standby.
• Vertical sync bar in the middle of the screen. (picture attached)
• Switches off by itself. intermittently. Standby LED lit .
• Vertical collapse. (+ extract of circuit diagram)
• Line output transistor overheats. (with circuit diagram extract)
• At switch on the light comes on. CTV starts up then cuts out,no light, crackling noise at the level of the power supply transformer. (with circuit diagram extract)
• Regulation fault of the PSU. Standby LED flashes red every sec.
• The power supply blows.
• Goes into standby after reducing the frame to a horizontal line after a few mins. (TS4451 tips)
• No channel storing.
• E/W correction can only be poorly adjusted. (picture attached)
• No power supply regulation.
• No start-up (when cold). (with circuit diagram extract) (TS4451 SCOTT repair tip)
• Shuts down. after start-up. (+ extract of circuit diagram)
• High contrast. Strong colours.
• Vertical lines are distorted horizontally. E/W equalizer can not be adjusted correctly.
• No picture content. Picture becomes increasingly bright with flyback lines. Switches to safety mode.
• No picture. via SCART. Audio OK .
• No sound and no picture. Appliance remains in stand by. (TS4451 SCOTT repair tip)
• No reception. EHT flashovers.
• No picture, no sound, standby display dot and horizontal bars over the screen light up in display. Can only be switched on with RC.
• Adjusting the SECAM (4,25MHz) colour carrier trap: chassis.
• Red raster. Horizontal lines.
• Appliance hums and does not start up. (extract of circuit diagram attached)
• At bottom of picture superimposition of a band similar to that of the sound level and to a yellow rectangle.
• Cut off lines visible after some time.
• Adjusting the SECAM identification: chassis.
• No colour (via SCART).
• TL19 fails in line output stage. (TS4451 SCOTT repair tip)
• Goes to standby at switch-on. Trips slowly if programme button held on. (picture attached) (TS4451 tips)
• Blue picture. Blue streaking.
• To improve alignment.
• White band on top of screen. Only a buzzing noise coming from loudspeaker.
• Synchronisation during PB of the VCR.
• No startup. Alarm noise from loudspeakers.
• Diode goes green and then switches off. CTV does not start. (+ extract of circuit diagram)
• Black stripes on upper and lower picture edge.
• Ticking, then PSU switches off.
• Fault at top of picture about 4cm after 30 mins.
• Black picture like in AV at switch on. OSD and channel display function. In AV picture ok but no reception via the aerial. No snow.
• Line output transformer arcing.
• Dead. No voltage on the secondary. 300V on collector TP29. All the transistors and diodes are ok. Even no standby light.
• After changing FBT twice, light varies when you turn focus pot; FBT ok, after a few moments light decreases at switch on, light picture with G2 set to minimum then darkens.
• PSU pulsates. (+ extract of circuit diagram)
• FP01 blows.
• Vertical deflection has collapsed to a bright line in the middle of the screen.
• PSU pulsates. Standby LED flashes . (extract of circuit diagram attached)
• Tripping. (part of circuit diagram displayed)
• Stuck in PAL.
• Erratic start-up. No or intermittent start-up. (with circuit diagram extract)
• Switches to standby. when changing channels.
• Picture is displaced towards bottom of screen (approx. 5cm to 15cm).
• High contrast.
• Dark screen, sound OK. Nothing in scart nor in RGB.
• Pincushion distortion.
• Picture and sound disappear after a few days or even after 5-6 hours operation. Standby stays on. Switching off and on help for a while.
• Starts up, but after 10 minutes picture is snowy and tuner sensibility decreases.
• LED is dim or OFF. (TS4451 tip from SCOTT)
• Repeated failure of BU508DF in power supply.
• 4cm vertical scanning for a few secs.
• Functions for 5 mins then all the channel numbers begin to run through constantly while each time the picture comes up again and RCU does not function.
• TL19 (S2000 AF) is S/C after switch on.
• Adjusting the peak white: chassis. (TS4451 tip from SCOTT)
• The light comes on. Power supply starts up for 1-4secs then cuts out.
• At switch on the vertical centering is off by 2cm at the top.
• Tuning drifts after 20 mins.
• Switches on, HV appears, then switches to standby. (TS4451 tips)
• Line output stage immediately defective after switch on. (part of circuit diagram displayed)
• Picture is dark, screen menu ok.
• Standby light switches off. (picture attached)
• Only the LL' display functions in the Multistandard version.
• No picture. (+ extract of circuit diagram)
• Poor switch off of picture tube.
• Switches to standby (at start-up). (with circuit diagram extract)
• US voltage increases, CTV stops.
• Low contrast on TXT and OSGs.
• Screen lit up. No sound or picture. Thermal noise in the sound and snow. No function via RC or control panel (+ extract of circuit diagram)
• Goes to SAFETY mode and no scanning possible.
• Switches off when switching channels. Only switches on again after RC switches to standby. Occasionally functions OK all evening but sometimes switches off when channel is initially changed. (+ extract of circuit diagram)
• Picture bright, dark or faint with flyback lines.
• Picture twitches intermittently in width and height, chriping or noise can be heard in SM transformer.
• Tuning drifts.
• Varying light intensity of standby LED. No start up but intermittent low hum.
• Stuck in standby. LED is red . (extract of circuit diagram attached)
• At start up crackling in the sound and arcing on the picture for a few mins then ok. (service info for SCOTT -TS4451)
• AV switching threshold for camcorders.
• Repeated failure of HOT.
• Excessive horizontal size. at top. Reduced horizontal size. at bottom.
• White screen. Flyback lines. (SCOTT - TS4451 information)
• Beat at startup.
• Switchover to another program site is not carried out.
• No start up of power supply. No standby light. No noise.
• The picture is displaced towards the top of the screen (approx. 4cm to 10cm). (TS4451 tip from SCOTT)
• Power supply starts up and switches to stand-by after a couple of seconds. (part of circuit diagram displayed)
• Dark picture (after a while).
• No manual or RCU command. Blocked on one channel, OSD apparent, sound present. (picture attached)
• Moire effect picture according to sound frequencies, on some frequencies the picture is ok for a fraction of a second. Melf RP54 is not present on the CTV chassis.
• No sound. No line transformer and standby LED is on.
• No power supply. No standby on front panel. (picture attached)
• Black screen. Channel 0 display on video.