63KV5617 GOYAVT / SIERRA [TV 63 (59) cm picture]

• No start-up from standby with RC.
• No light lit. (picture attached)
• Blank raster. No tuning.
• Does not stop at stations. Station search OK. (+ extract of circuit diagram)
• Picture linearity error. Picture has shifted towards top. Picture folds over at the bottom.
• Chopper transistor (BUT18AF), rectifier diodes and mains fuse become defective instantly. (part of circuit diagram displayed)
• Intermittent colour.
• CTV switches on but nothing happens. No sound or picture on the traditional aerial. On the contrary in scart with a dish the CTV has a picture but no sound. No automatic search possible. (extract of circuit diagram attached)
• TV starts, has raster but no image and no sound. Display shows "FO". (extract of circuit diagram attached) (63KV5617 tip from SIERRA)
• PSU blocking. (extract of circuit diagram attached)
• Retrace lines. intermittently. (SIERRA - 63KV5617 information)
• As the set warms up the picture flashes cyan every few seconds. (picture attached)
• No picture. TXT OK . (extract of circuit diagram attached) (63KV5617 tips)
• No teletext and OSD is hardly visible. The regular picture vibrates if appliance is switched to teletext. (extract of circuit diagram attached)
• Power supply falls to approx 40V AC on the variac. (+ extract of circuit diagram)
• Appliance starts intermittently with no standby. (with circuit diagram extract) (63KV5617 tips)
• Set does not start-up after implementing SOPS kit. (+ extract of circuit diagram) (SIERRA - 63KV5617 information)
• Blank screen. Audio OK .
• Search stops with good tuning. (63KV5617 tips)
• TV locked by and keys.
• Grey screen. (picture attached)
• Dark screen. via tuner. Audio and OSD OK . (+ extract of circuit diagram)
• Colour flickering during video editing.
• Lower picture third is dark. Upper picture is dispersed. (+ extract of circuit diagram)
• BU508, Q7593 and Q7594 are defective. (+ extract of circuit diagram)
• Unstable AFC. Noisy picture. (part of circuit diagram displayed)
• To give improved protection to the BUT11AF chopper transistor TR7665. (63KV5617 SIERRA repair tip)
• Picture is too wide or too small when adjusting horizontal size.
• Dead. Humming noise from transformer. (+ extract of circuit diagram)
• Reduced horizontal size. Vertical foldover. in the centre. (+ extract of circuit diagram)
• Picture flickers intermittently, sound disappears. Picture reappears by itself, sound doesn't but can be activated with the RC.
• Blows chopper transistor when switching on with remote. (picture attached)
• Goes into safety mode if it is left in standby then switched on via the switch. Starts normally if speaker or HT O/C. (part of circuit diagram displayed)
• Page 811 appears spontaneously. (extract of circuit diagram attached) (63KV5617 tip from SIERRA)
• Reduced horizontal size. intermittently.
• CTV functions one day. (extract of circuit diagram attached)
• TV blocked in F3.
• Cramped at bottom with slight foldover.
• No HV. (picture attached)
• Lacks contrast. No reaction on the plus or minus key of the contrast button. Other commands are ok.
• No synchronisation. intermittently. (picture attached)
• No quick start pulse. (part of circuit diagram displayed)
• Horizontal white line. (with circuit diagram extract)
• Power supply failure. (+ extract of circuit diagram)
• Intermittently dead. (picture attached)
• Black screen. intermittently. (picture attached)
• Appliance does not start up. Crackling. (picture attached)
• Pulsating, no start up. (picture attached)
• Transformation in K' (only for stereo versions). (part of circuit diagram displayed)
• White area visible on right side of screen in EXT1 mode of BL sets. (picture attached)
• No picture. Grey screen. Brightness control works normally. (part of circuit diagram displayed) (63KV5617 tip from SIERRA)
• BUT18 fails repeatedly. (part of circuit diagram displayed)
• Trips. (picture attached)
• Appliance only functions until the 120V is reached with the variac. When the mains voltage is increased the appliance fails. (extract of circuit diagram attached)
• Sound was OK but there was no vision for the first 10 mins after switch on. (+ extract of circuit diagram)
• Poor picture. via tuner. (extract of circuit diagram attached)
• Vertical foldover at top and bottom. (extract of circuit diagram attached)
• At start up picture appears normally then darkens gradually in PAL. Normal in SECAM. Sound ok. Picture reappears by reducing the contrast, OSD normal. All other functions normal. (with circuit diagram extract)
• BUT18 blows at 100V on the variac.
• No functions. Red LED blinks. (picture attached)
• S/C in 148V line. (+ extract of circuit diagram)
• Interference in picture. when cold. (+ extract of circuit diagram)
• Works correctly but power supply BUT11 blows after 3 weeks. (with circuit diagram extract)
• No sound at some stations or audio failure. Via scart OK.
• Sound only at program switch-over. (extract of circuit diagram attached)
• PSU blown.
• No switch on. Noise from loud-speakers and smell of burning. (+ extract of circuit diagram)
• Narrowing of line and frame then flashing of the picture. Screen turns dark after 10 mins. Picture ok when cold. (with circuit diagram extract)
• Dark screen and bright bar at the top. Clock is strange. Sound present. (+ extract of circuit diagram)
• Line BU508blows after 3 days. (with circuit diagram extract)
• Too high power supply. (extract of circuit diagram attached)
• Does not switch to standby. Horizontal line. LED blinks . (picture attached) (63KV5617 tips)
• Low contrast. in TXT. (with circuit diagram extract)
• Undefined Stereo Mono switchover.
• No signal on the BUT11AF collector. (extract of circuit diagram attached)
• Light green picture despite adjusting. Impossible to get red. (picture attached)
• Flashing picture. (with circuit diagram extract)
• After a few secs in standby, 7625 and fuse destroyed. (+ extract of circuit diagram)
• Slight E/W distortion. (extract of circuit diagram attached)
• Defective standby thyristor (SFOR5D43). (with circuit diagram extract)
• No vertical deflection. Horizontal line. (picture attached)
• Black horizontal lines. (extract of circuit diagram attached) (SIERRA - 63KV5617 information)
• Line BU keeps failing. (extract of circuit diagram attached)
• No sound or picture. Snowy screen (picture with test signal). Vertical interference bars. (picture attached)
• Poor OSD. Unusual colour of some characters. (+ extract of circuit diagram)
• Poor regulation of the power supply. (with circuit diagram extract) (service info for SIERRA -63KV5617)
• At start up goes immediately into standby. 12C BUS blocks at 5V. (extract of circuit diagram attached)
• Set dead, power supply refuses to start. Also intermittent start and no standby (picture attached)
• Picture shifted vertically.
• Line output transistor fails repeatedly. after a while. (with circuit diagram extract)
• Does not switch on from standby. LED blinks and goes off or changes to red and then no more functions.
• No E/W. (63KV5617 tip from SIERRA)
• Vertical foldover. (picture attached)
• No picture or narrow streak after warm-up. (extract of circuit diagram attached)
• No horizontal deflection. (extract of circuit diagram attached)
• +148V drops to 100V occasionally according to the tube output. (+ extract of circuit diagram)
• Power supply is low when warm. (picture attached)
• No functions. Power LED lit . (extract of circuit diagram attached) (63KV5617 SIERRA repair tip)
• PSU varies according to picture content when warm. (extract of circuit diagram attached)
• No regulation. (picture attached)
• Voltage too low. (picture attached)
• Primary PSU switches off. No standby LED.
• PSU becomes defective after switch on via mains switch.
• Appliance starts up with the variac until it reaches 100V and then the appliance fails. (part of circuit diagram displayed)
• In Standby BUT18AF (T7625) becomes defective.
• No synchronisation. when cold. (extract of circuit diagram attached)
• Standby LED flashes at switch on, then switches off after a few secs, if no action is taken. If RC is pressed LED remains on, but no picture and audio. (extract of circuit diagram attached)
• Erratic functions. (picture attached)
• Appliance works for 4 hours and then cuts out completely.
• No MONO audio. STEREO OK . (part of circuit diagram displayed)
• Does not switch to standby. Picture remains on screen. (part of circuit diagram displayed)
• When warm, picture foldover and the line BU blows. (with circuit diagram extract)
• Local dooming / PP-settings. (with circuit diagram extract)
• Character error.
• Vertical stripes at left picture edge via channel 2 and 4. (extract of circuit diagram attached)
• No function. Buzzing noise. (part of circuit diagram displayed)
• Picture is affected by frizzy lines occasionally with crackling noise in the speakers and perhaps with a burnt smell. (+ extract of circuit diagram)
• Crackle a few seconds after Power On. (+ extract of circuit diagram)
• Hum in audio. (extract of circuit diagram attached)
• Phase fault. (picture attached)
• Regulation does not function without a load. (with circuit diagram extract)
• Diode D6653 installation sops kit.
• Line output transistor fails repeatedly. intermittently. (picture attached)
• No colours. After approx an hour colours appear with fluctuations. (with circuit diagram extract)
• Impossible to adjust horizontal shift of picture using R3595. (part of circuit diagram displayed)
• Switches off intermittently. Standby LED (red-green) flashes. Picture drops out. (with circuit diagram extract)
• Green LED does not light up. Power supply oscillates. (extract of circuit diagram attached)
• Line pairing at top half of the picture (extract of circuit diagram attached)
• Frame shrinks horizontally when changing brightness. (+ extract of circuit diagram)
• Stuck on channel 1. (service info for SIERRA -63KV5617)
• BUT11AF S/C. (with circuit diagram extract)
• Change in picture width depending on beam current. (picture attached)
• F5 displayed on a screen corner. Occasionally channels switch over to channel 1 or TV switches off.
• No start-up. Standby LED does not light. (extract of circuit diagram attached)
• No tuning. intermittently. (part of circuit diagram displayed) (SIERRA - 63KV5617 information)
• Switching transistor T7625 has failed. (+ extract of circuit diagram)
• Luminance takes a long time to appear. Distorted picture, focus pot does not react sufficiently. (part of circuit diagram displayed)
• PSU has no function.
• Power supply fuse (18A) defective after 1 hr or less. (with circuit diagram extract)
• No picture. when cold. (picture attached) (63KV5617 SIERRA repair tip)
• Adjustment black line matrix. (63KV5617 tip from SIERRA)
• Humming noise from transformer. Line output transistor fails repeatedly. (with circuit diagram extract) (63KV5617 tip from SIERRA)
• Low sound on channel A. (part of circuit diagram displayed)
• BUT18 is defective. (with circuit diagram extract)
• No start-up with mains switch after switched off from standby.
• Dead. Error code F1 displayed.
• How to check the power supply without blowing BUT18AF.
• Shuts down. LED is green. (with circuit diagram extract)
• Picture fault in tuner and scart.
• No reset.
• Only pulsates once. Resistor R3661 in the 5V rail is burnt.
• Power supply goes into safety mode and crackles. (picture attached)
• Red standby light then dead at switch on. TV starts up on the variac. (extract of circuit diagram attached)
• No functions. LED lit. . (part of circuit diagram displayed)
• When switched to standby U1 becomes 60V. PSU goes to limiting. (picture attached)
• Line BU blows after a moment. (+ extract of circuit diagram)
• Excessive horizontal size. Picture size varies with picture content. (+ extract of circuit diagram)
• Slow start-up. (part of circuit diagram displayed)
• With high volume the appliance switches spontaneously to standby. (with circuit diagram extract) (63KV5617 tips)
• Picture collapses. Pincushion distortion. (with circuit diagram extract)
• After start up, PSU fails. (picture attached)
• Appliance hums in Standby.
• Connection of the loop system to the TV.
• Distorted vertical lines at top and bottom of monoscope. E/W correction is faulty. (+ extract of circuit diagram)
• Line transistor 7545 fails after approx. 3 secs. (picture attached)
• Does not store settings. (part of circuit diagram displayed)
• Distorted TXT. at top. (service info for SIERRA -63KV5617)
• Picture stretched at top, compressed at bottom with black bar. Picture improves when warm. (part of circuit diagram displayed) (service info for SIERRA -63KV5617)
• Switches off during operation. When it is switched on again crackling is heard from HT. (picture attached)
• Humming noise from transformer. in standby. (+ extract of circuit diagram)
• Blocked. (+ extract of circuit diagram)
• Switches to protection mode. intermittently. (picture attached)
• No contrast control. (with circuit diagram extract)
• Trapezoid picture. No E/W correction.
• No power supply, protection circuit triggered. (picture attached)
• Replacement of TDA8451 (IC7305). (extract of circuit diagram attached)
• Colour bar at right of screen. (extract of circuit diagram attached)
• No sound, even with in or out scart.
• Set functions with the variac but BUT11AF blows when appliance is plugged in. (+ extract of circuit diagram)
• Red light flashes for approximately 3 seconds then zero.
• Secondary voltage cannot be adjusted lower than 160V. PSU however can be regulated with this voltage.
• No start up. No front panel LED. Quiet noise from loud-speakers.
• No LED lit. (part of circuit diagram displayed)
• Shuts down. after a while. (extract of circuit diagram attached)
• After switch on the picture is sometimes shifted and a black horizontal bar appears in the centre of the picture. (+ extract of circuit diagram) (63KV5617 SIERRA repair tip)
• Horizontal stripe. intermittently. (picture attached)
• U system only 5V instead 148V. (+ extract of circuit diagram)
• Set can be turned off with RC, but not turned on. S.B. LED blinks. (with circuit diagram extract) (service info for SIERRA -63KV5617)
• No picture. Audio and OSD OK . (SIERRA - 63KV5617 information)
• Faulty TXT. No TXT. intermittently.
• Starts, but only raster. Display shows "F3". (extract of circuit diagram attached)
• No control signal to IC7470 (TDA) and no line scanning. (extract of circuit diagram attached)
• Vertical deflection is defective. A piece is missing at the bottom and at the top the lines are pulled apart. (picture attached) (63KV5617 tip from SIERRA)
• Does not switch to standby, picture remains, sound mutes. (extract of circuit diagram attached)
• Difficult to set up east/west and width controls. (part of circuit diagram displayed)
• PSU defective. (extract of circuit diagram attached)
• Vertical shift incorrect, after replacing a 28" BL-CRT. (part of circuit diagram displayed)
• The output transistor of the power supply is defective. BUT11AF or 2SC3973B.
• Intermittently green "F5" on screen, thereby very dark picture or TXT appears. (+ extract of circuit diagram)
• Switches to protection mode. (picture attached)
• Vertical foldover at top.
• Horizontal stripe. (with circuit diagram extract)
• BUT18AF (T7625) becomes defective in standby. (extract of circuit diagram attached) (63KV5617 tips)
• Goes to blank screen with unlocked TXT lines when TXT selected.
• Poor audio. only on certain channels. Crackling audio.
• Horizontal size varies. (with circuit diagram extract)
• Switching transistor of the SOPS power supply is defective. (extract of circuit diagram attached)
• When cold, picture takes approx 2.5 mins to appear instead of 15 secs. When warm it takes 20 secs. (with circuit diagram extract)
• Does not switch to standby. LED turns pink. Picture remains. Sound mutes. (part of circuit diagram displayed)
• Interference in picture. No picture. No audio. (extract of circuit diagram attached)
• Vertical bars on channels 2 and 4 (+ extract of circuit diagram)
• BUT11 becomes defective after 3 days of use. (+ extract of circuit diagram)
• Very low secondary voltages. (with circuit diagram extract)
• Occasionally picture seems to be coded on all the channels especially when cold. (+ extract of circuit diagram)
• Defective line transistor. (+ extract of circuit diagram)
• Blows components. after a few minutes. (with circuit diagram extract) (63KV5617 tips)
• Local dooming - spots in the picture.
• No red. (extract of circuit diagram attached)
• End stage transistor BU508 fails repeatedly at switch on. (extract of circuit diagram attached)
• In standby tries to operate spontaneously. (with circuit diagram extract)
• Hum in audio. in standby. (extract of circuit diagram attached)
• Line transformer noise. (picture attached)
• R3653 burns. (picture attached)
• No picture, only audio via SCART. "Off air" picture displayed.. (+ extract of circuit diagram)
• Mono/Stereo-indication switches. (with circuit diagram extract) (63KV5617 tip from SIERRA)
• Picture varies with beam current. (picture attached)
• Chopper and line output transistors S/C. (extract of circuit diagram attached)
• Over-voltage circuit active. (with circuit diagram extract)
• Picture width changes according to its content. Linear distortion on right and left sides over 5cm (no ondulation).
• Intermittent line and raster synchro. (with circuit diagram extract)
• Buzz in audio. (with circuit diagram extract)
• No horizontal synchronisation. when cold. (picture attached)
• Excessive brightness. (with circuit diagram extract)
• +16V flashover. (extract of circuit diagram attached)
• Poor vertical linearity. Horizontal size varies. (with circuit diagram extract)
• Picture is not linear. Black bar at bottom of picture. (+ extract of circuit diagram)
• 148V measures 60V. (+ extract of circuit diagram)
• Dead. Red LED blinks. (picture attached) (63KV5617 tips)
• The power supply BUT18AF shorts after operating for 5 hours. (extract of circuit diagram attached)
• Capacitor 2545 in PSU burns. (part of circuit diagram displayed)
• Switch on during standby only functions when RC is very close to the appliance. (63KV5617 SIERRA repair tip)
• BU508 blows one min after HT transistor (BU508AF) has been replaced. Picture OK during this one min.
• In VCR there are only chroma lines. (picture attached)
• Tuning drifts. after a while.
• Set will go off after a period that varied from ten minutes to five hours. It will then stay off,coming back on again after a similarly indeterminate period.
• Poor NICAM sound from left hand speaker.
• Green spot after viewing a white object on the screen.
• Dead. Soft ticking sound. (service info for SIERRA -63KV5617)
• Oval picture.
• Line output transistor fails repeatedly. (with circuit diagram extract)
• Frayed vertical lines. (extract of circuit diagram attached)
• Tuning unstable. (+ extract of circuit diagram)
• Intermittent picture size.
• Discharging noise. via speakers.
• The bottom half of the raster is missing, with the top cramped.
• Poor vertical linearity. Reduced vertical deflection. (+ extract of circuit diagram)
• 185V instead of 148V. When taking a measurement on collector of TZ 7652, bulb goes off. (picture attached)
• One single line in the middle of the screen. (picture attached)
• Power supply too low (20V). (extract of circuit diagram attached)
• Unadjustable horizontal centering. (part of circuit diagram displayed)
• Intermittent power supply shut down, the picture goes off for a split second, the display flickering in sympathy.
• Flyback lines. intermittently.
• Switches to safety mode at approx. 110 V mains voltage. (picture attached)
• Picture size varies with picture content. (+ extract of circuit diagram)
• Line output transistor fails repeatedly. after start-up.
• No picture. intermittently. (+ extract of circuit diagram)
• Volume uncontrollable. No brightness control.
• Buzzing from PSU. Motorboating noise from speakers. in standby. (extract of circuit diagram attached)
• Local dooming, especially with high contrast. (+ extract of circuit diagram)
• Poor linearity. (picture attached) (SIERRA - 63KV5617 information)
• Jagged picture. (+ extract of circuit diagram)
• BUT11 in power supply defective after few days, or when in standby. (picture attached)
• Noise in audio.
• Snow on screen and no reception. F4 displayed on screen. Green LED lit. (extract of circuit diagram attached) (service info for SIERRA -63KV5617)
• Reduced raster size. (part of circuit diagram displayed)
• Picture jitters. when cold. (picture attached)
• Displays error code F4. When you switch to standby again, F4 appears again. LED flashes. Only noise. (picture attached)
• Vertical roll. (picture attached)
• No TXT, just lines on screen. (service info for SIERRA -63KV5617)
• Picture flickers for approx 5 mins after switch on when cold, then everything normal as soon as appliance reaches room temperature.
• Tripping. intermittently.
• Beam current dependent picture width fault. (+ extract of circuit diagram)
• No luminance. (with circuit diagram extract)
• Defective BUT.
• Slow start-up. Switches to standby. (+ extract of circuit diagram) (SIERRA - 63KV5617 information)
• Vertical size varies. Vertical jitter.
• Picture and sound drop out. Appliance jumps to channel 1.
• Egg-shaped picture, picture is pushed upwards. Underneath 5cm black bar. (+ extract of circuit diagram) (63KV5617 tip from SIERRA)
• Ghosts and poor colours. (part of circuit diagram displayed)
• Chopper transistor failure. (with circuit diagram extract) (63KV5617 SIERRA repair tip)
• Bright picture. Pulsating power. Incorrect picture edge on top and bottom. (picture attached)
• Horizontal output stage fails again after some time. (with circuit diagram extract) (SIERRA - 63KV5617 information)
• At switch on with the mains switch, pulsates and after a while begins to function regularly (not always). Does not switch off completely if switched off with RC. (+ extract of circuit diagram)
• No synchronisation.
• No horizontal synchronisation. intermittently. (+ extract of circuit diagram)
• Picture shifted to the right. Poor synchronisation. (part of circuit diagram displayed)
• No vertical synchronisation. (with circuit diagram extract)
• Shuts down. after a while. LED blinks .
• Set not regulating after SOPS re-build of secondary side of PSU. (+ extract of circuit diagram)
• Videotext has turbulent text content in upper section.
• No channels.
• Flickering text and apparent tuning drift. (service info for SIERRA -63KV5617)
• Buzzing from PSU. in standby. (with circuit diagram extract) (63KV5617 SIERRA repair tip)
• White picture and no amplitude when cold. Picture pumping. (+ extract of circuit diagram)
• Appliance runs ok, but if remote used to switch to standby, appliance goes dead. (with circuit diagram extract)
• Shuts down. after a few minutes. (+ extract of circuit diagram)
• When switched off with RC, does not switch on again and LED remains off. (part of circuit diagram displayed) (SIERRA - 63KV5617 information)
• Vertical foldover at bottom. (with circuit diagram extract)
• Fuse 2A and BUT18 immediately defective at switch on with RC. Fault does not occur when switching on with on/off switch or by connecting mains plug. (extract of circuit diagram attached)
• Appliance works fine for hours, but after switching off with the remote control the BUT18 and mains fuse go defective. (with circuit diagram extract)
• 148V at approx 30V. (part of circuit diagram displayed)
• Thyristor fails in PSU in standby. Otherwise appliance OK. (part of circuit diagram displayed)
• Pincushion distortion at each side. Adjustment potentiometer does not correct fault. (part of circuit diagram displayed)
• LED lights up for a moment. TV is dead. Light on the power supply sometimes functions. (picture attached)
• 5.1V incorrect. (with circuit diagram extract)
• Appliance fails and later comes back unprompted. (part of circuit diagram displayed)
• Lines on picture and sections blanked out. No TXT. (with circuit diagram extract) (63KV5617 tips)
• Quick diagnosis (part of circuit diagram displayed)
• R3368 and R3369 burn up at switch on. (picture attached)
• Chroma fault in SECAM. (with circuit diagram extract)
• When put into standby tube remains lit. Picture cuts out normally. (part of circuit diagram displayed)
• 100V power supply is approx 35V. (picture attached)
• TV blocks on 600MHZ. If you do a frequency search, it goes through all frequencies but does not find any channels. (picture attached)
• Horizontal-BU 508AF has a s/c. After replacing this fails again after a few seconds. (extract of circuit diagram attached)
• Intermittent black picture with TXT. Intermittent TXT in picture.
• Dark picture. No picture. via SCART. No audio. via SCART. No RC functions. (picture attached)
• Switches on for a few secs with extreme brightness. No picture. Sound OK. Goes into safety mode immediately after.
• With Blackline picture tubes occasional or random OSD insertion.
• BUT18AF is defective and is destroyed when appliance is switched on. (+ extract of circuit diagram)
• Red picture. after a while. (picture attached)
• Extra protection for chopper transistor TR7625 (BUT18AF). (with circuit diagram extract) (63KV5617 SIERRA repair tip)
• Weak contrast. No contrast control. (63KV5617 tips)
• Does not go into standby. LED becomes orange but picture remains. (picture attached)
• Negative picture when cold and sometimes intermittently. (part of circuit diagram displayed)
• Poor chroma identification in Pal/Secam. On channels 5, 6 or with VCR, blue or red bands. (with circuit diagram extract)
• Poor frame linearity when cold. Picture is distorted vertically. (+ extract of circuit diagram)
• When switching on, HV part hums. No control function is possible. (part of circuit diagram displayed)
• No tuner reception. Search display functions well but appliance does not pick up any channel. (picture attached)
• Faded picture. No contrast. (part of circuit diagram displayed)
• No picture, teletext and sound are fine. (part of circuit diagram displayed) (63KV5617 SIERRA repair tip)
• Black screen. No brightness. Audio OK . (with circuit diagram extract)
• PSU fails after a short time (S/C of BUT18AF). (+ extract of circuit diagram)
• Does not decode Canal Plus no the sound. Green LED flashes. (with circuit diagram extract)
• No picture. No display. Erratic functions. (picture attached)
• Only grey picture after being struck by lightning. TXT also runs. (with circuit diagram extract) (63KV5617 SIERRA repair tip)
• PSU no function.
• Line transistor S/C.
• Occasionally standby thyristor 6670 S/C. (+ extract of circuit diagram)
• Faulty TXT. (part of circuit diagram displayed)
• White screen.
• Defective BUT and fuse in the PSU. After replacing the appliance runs for several days until the fault occurs again. (part of circuit diagram displayed)
• No functions. No button operation. (picture attached)
• No picture. on lower half screen. (extract of circuit diagram attached)
• Fails in standby. (picture attached) (63KV5617 SIERRA repair tip)
• Ragged verticals.
• Poor horizontal centering. (extract of circuit diagram attached)
• Destruction of the power supply BU. (part of circuit diagram displayed)
• Horizontal, bright line.
• BUT18, R3570 and F1534 blow. (+ extract of circuit diagram)
• HV capacitor burns. (part of circuit diagram displayed)
• Insufficient picture height which can be adjusted. Poor E/W.
• Protection of T7625 (BUT18AF). (extract of circuit diagram attached) (service info for SIERRA -63KV5617)
• Poor width regulation with brightness. (extract of circuit diagram attached)
• No start-up. (extract of circuit diagram attached)
• Vertical linearity is upwards a little sharp. Picture has shifted upwards. (extract of circuit diagram attached)
• No raster. (+ extract of circuit diagram)
• No colour. when cold. Poor colour. after warm-up. (extract of circuit diagram attached)
• PSU transistor (BUT18A) becomes defective right after start-up.
• Dark screen. LED is green. (with circuit diagram extract) (63KV5617 tips)
• Tuning search does not stop when appliance has found a station. (part of circuit diagram displayed)
• Flash over on picture tube print.
• Defective T7545. (extract of circuit diagram attached)
• Picture leans too much to one side, Black line visible in the picture. (picture attached)
• Memory loss. (part of circuit diagram displayed)
• Contrast adjustment inoperative, colour streaks. (with circuit diagram extract)
• Contrast variations with subtitling in sets with BL-CRT. (+ extract of circuit diagram) (63KV5617 tip from SIERRA)
• Line output transformer overheats. (part of circuit diagram displayed)
• White picture with flyback lines. (part of circuit diagram displayed)
• Picture is stretched - begins 5cms from bottom of the screen and is missing approx 1cm East/West. Appliance functions. (part of circuit diagram displayed)
• Local dooming. (extract of circuit diagram attached) (63KV5617 tips)
• No tuning. when cold. (part of circuit diagram displayed)
• Green picture. after a while. (part of circuit diagram displayed)
• Intermittently screen blanks out. Random characters on screen.
• Starts up again then clicks after a few mins. PSU faled again. (extract of circuit diagram attached) (service info for SIERRA -63KV5617)
• Dark screen. No OSD. (picture attached)
• Darker bar on left of screen. (with circuit diagram extract)
• No colour. (with circuit diagram extract)
• Intermittent failure thyristor 6670 in STANDBY mode. (with circuit diagram extract)
• No picture. No brightness. No sound. Picture tube filament on.
• Intermittently BUT18 defective after switching on. (+ extract of circuit diagram)
• BUT transistor becomes S/C either at switch on or after a certain period of time. (with circuit diagram extract)
• Sometimes the BUT18AF goes defective. (with circuit diagram extract)
• Power supply crackles when power supply is low. (with circuit diagram extract)
• No picture. in E-E. Audio OK .
• Snow on screen and no tuner reception. F3 displayed on screen. Green LED on.
• Line output stage periodically fails. (part of circuit diagram displayed)
• No operation. (with circuit diagram extract)
• Microprocessor/eprom screening plate. (extract of circuit diagram attached)
• BU508 defective after switching channel (when appliance is warm). (extract of circuit diagram attached)
• No adjustment from PSU possible. (part of circuit diagram displayed)
• Picture green and purple in the E/W direction.
• Crackling from FBT and black vertical bars on screen for a few secs after start up. (with circuit diagram extract)
• Blows fuse. after a few hours. (+ extract of circuit diagram)
• No OSD. intermittently. (+ extract of circuit diagram) (63KV5617 tip from SIERRA)
• If mains switched off when in standby, it does not start up again. Light off. (+ extract of circuit diagram)
• Picture rolls. (+ extract of circuit diagram) (service info for SIERRA -63KV5617)
• Top of text is ringing. Intermittent text.
• No colour. Coloured bars in picture. OK after a few minutes. (part of circuit diagram displayed) (63KV5617 tip from SIERRA)
• No switching into CCIR standard. Display ok in SECAM and PAL/SECAM. (+ extract of circuit diagram)
• E-W output stage fails as soon as the appliance is switched on. Fuse 1534 (315mA) also fails. (extract of circuit diagram attached)
• The horizontal centering cannot be adjusted correctly. It may have shifted after the appliance has warmed up.
• Wavy picture. via AV.
• Horizontal line. in the centre. (extract of circuit diagram attached)
• Colour flickering during video editing. (63KV5617 tip from SIERRA)
• Red flashing when changing channels with VCR playback in the still, search modes or edit points in own recordings. (extract of circuit diagram attached)
• Dark screen. No picture. No RC functions. (picture attached)
• Excessive red. (63KV5617 tip from SIERRA)
• Line end stage U/syst collapses to approx. 48V. (picture attached)
• Does not switch to standby. No functions. at switch-off. (part of circuit diagram displayed)
• Picture shakes.
• Picture becomes smaller and smaller after a certain time. No sound. Finally appliance switches off definitely. Burnt smell when trying to switch on again, then no switch on at all. Standby LED is OFF.
• No audio. after a while. (extract of circuit diagram attached)
• Can not be switched off in Standby position. When starting, LED becomes orange and blows. (+ extract of circuit diagram)
• Nasal sound on channels 5 and 6. (picture attached) (service info for SIERRA -63KV5617)
• Strange noise in loudspeakers. (+ extract of circuit diagram)
• No start-up. intermittently. (extract of circuit diagram attached)
• One colour missing.
• PSU chirps. (part of circuit diagram displayed)
• No horizontal synchronisation. (picture attached)
• Power supply too low (70V). (extract of circuit diagram attached)
• Colour blobs in the picture.
• Chopper transistor (BUT18AF) fails if appliance is switched on from standby. (part of circuit diagram displayed)
• No functions. intermittently.
• Loss of red, green or blue or excessive red, green or blue pictures.
• Supply transistor BUT18A becomes defective immediately after switching on the appliance. (picture attached)
• No picture, no sound. TV starts up and tube lights up. (part of circuit diagram displayed)
• No sound. No response to commands from both RC and front panel. Error message F2 on screen. Picture ok. (with circuit diagram extract)
• Distorted picture. at top. (with circuit diagram extract)
• No picture, only horizontal stripe on top. Picture appears only after a long while. Then picture collapses to a horizontal stripe in the centre.
• BU508AF fails repeatedly. (part of circuit diagram displayed)
• When switching on the appliance when it's cold, it takes about 35 seconds before the picture appears. (with circuit diagram extract)
• Picture pulsates on white background.
• F4 displayed. LED flashes green then orange for slightly less than a sec. (picture attached)
• Reduced vertical size at bottom.
• Fails occasionally.
• Severe crossover distortion in left channel. (63KV5617 tips)
• Blows chopper transistor at switch on.
• BUT18AF fails repeatedly. (part of circuit diagram displayed)
• Dark picture. at bottom. Stretched picture. at top. (with circuit diagram extract)
• White square in a corner of the screen. (part of circuit diagram displayed)
• Distorted picture. (+ extract of circuit diagram)
• The resistors 3661 and 3662 burn in standby, TS7625 is also defective sometimes. (picture attached)
• After approx 20 mins operating time appliance switches off. Then no Led. When you switch off completely with the mains switch and wait a time appliance starts again when you switch on.
• Horizontal end stage BU508AF short circuits after different playing times. (picture attached)
• No chopper power supply. (+ extract of circuit diagram)
• Sound and picture pulsating (2 times a sec) only via tuner.
• BUT18 and rectifier bridge blow every two days even after modifications.
• No brightness. No audio. Raster OK . (extract of circuit diagram attached)
• Switches off after operation time. LED goes off. Dead. Can be turned on via mains switch, then switches off again after operation time.
• T7637 blown. (extract of circuit diagram attached) (63KV5617 tips)
• Fuse, bridge rectifier and BUT11 in PSU blow when in standby for 10 mins. (picture attached)
• Mains fuse O/C and BUT S/C. (+ extract of circuit diagram)
• Ballooning and incorrect picture linearity.
• TXT has no function. TXT is activated but only dark screen.
• Switching transistor in power supply goes short circuit (BUT18).
• Dark picture.
• EHT problems. (picture attached)
• No picture. No audio. OK via SCART . (with circuit diagram extract)
• No picture. F4 lights up in the display. (with circuit diagram extract)
• Reduced vertical deflection. intermittently. (extract of circuit diagram attached)
• Problems with flof TXT. Cannot find p.811 in spite of it being sent out. TXT header remains with subtitling. (picture attached)
• No PAL chroma.
• No HT output voltage of 148V. Voltage is present (approx. 158V) when disconnecting HT coils connector. (with circuit diagram extract)
• Cannot be switched to standby. After the first attempt appliance is blocked. (part of circuit diagram displayed)
• Squealing from PSU. after start-up. (+ extract of circuit diagram)
• 148V does not go pass 20V. (part of circuit diagram displayed) (63KV5617 SIERRA repair tip)
• 148=68V. (part of circuit diagram displayed)
• Stretched picture. at top. Reduced raster size. at bottom. (picture attached)
• Channels run through. (picture attached)
• E/W fault. No E/W correction. (+ extract of circuit diagram)
• Transistor T7545 (BU508AF) becomes intermittently defective at program switch-over via "+" and "-" on user control.
• Picture looks as if it were encoded (like on C+ channel). Sound is OK.
• PSU fuse blown. (+ extract of circuit diagram)
• Usys voltage of line output stage collapses to approx 48V. (with circuit diagram extract)
• No 9V. (+ extract of circuit diagram) (SIERRA - 63KV5617 information)
• Dead. intermittently.
• Start with interfering voltage. (+ extract of circuit diagram)
• PSU repeatedly blows up. (picture attached)
• On the test picture, distorted, vertical lines at top and bottom of the screen. (picture attached)
• Horizontal deflection BU fails after a few hours.
• Raster signal problem.
• Replacing the EEPROM. (extract of circuit diagram attached)
• S/C from point 18 at line transformer to the ground. (extract of circuit diagram attached)
• Slow start-up. Audio OK . (+ extract of circuit diagram)
• Ticking sound. (+ extract of circuit diagram)
• Fuse and PSU BU (BUT18AF) defective.
• S/C in line output stage (7645). (extract of circuit diagram attached) (63KV5617 tip from SIERRA)
• No function. On start-up easy chirp is audible. (part of circuit diagram displayed)
• Replacing TDA2579. (with circuit diagram extract)
• Power supply breaks down. (part of circuit diagram displayed)
• No picture. when cold. Audio OK . (part of circuit diagram displayed)
• BUT11A fails after operating for long time. (picture attached)
• Power supply BU and fuse are defective when TV started up from standby. Occurs every week or fortnight and is very variable. (extract of circuit diagram attached)
• No E/W correction. Pincushion distortion. (with circuit diagram extract)
• Blue picture. after a while. (picture attached)
• Line end-stage has no function.
• Line BU blows after operating for 3-5 mins. (+ extract of circuit diagram)
• Excessive vertical size. (+ extract of circuit diagram)
• High voltage unit is smouldered. (+ extract of circuit diagram)
• Intermittently blown Wickman fuse 1534.
• Vertical collapse. after a few minutes. Audio OK .
• Picture takes a long time to appear (several mins). (+ extract of circuit diagram)
• Power supply is often destroyed when left in standby. (extract of circuit diagram attached)
• Line tearing and picture twitching at the sides of the picture.
• Vertical bar. on the left. (picture attached)
• Vertical sync does not stop. (with circuit diagram extract)
• Purity fault. (picture attached)
• Takes approx 1 minute to come on, will not switch to standby, sound mutes but pulsating picture remains. (with circuit diagram extract)
• Causes for appliance going into safety mode.
• No TXT. Intermittent green dots or lines through picture. Black screen.
• Protection mode activated.
• Width of picture pumps according to picture content and narrows with a strong white. (+ extract of circuit diagram)
• The appliance functions correctly in standard B,G but the sound hums in F standard. (part of circuit diagram displayed)
• After about 3 to 4 weeks of regular play, the BUT18 and the main fuse automatically blow. (picture attached)
• No switch on. Red LED flickers for 3 seconds.
• No colour in SECAM and PAL. Colour may appear slightly in SECAM when warm. (part of circuit diagram displayed)
• Vertical collapse. intermittently. (+ extract of circuit diagram)
• When warm, there is a raster fault on the left. (with circuit diagram extract)
• TXT problem. Some characters do not display.
• Line output transformer does not start up. (with circuit diagram extract)
• EXT1 switchover is defective, terrestrial program remains. (service info for SIERRA -63KV5617)
• Dark picture. Audio OK . (part of circuit diagram displayed)
• Picture takes some time to appear. Dark screen then TV stops. Round colour spot which slowly disappears. (part of circuit diagram displayed)
• TS7625 (BUT 18AF) fails again. (part of circuit diagram displayed)
• Thyristor goes S/C when switched to standby. (extract of circuit diagram attached)
• 17V instead of 140V. (with circuit diagram extract)
• Thyristor TR7670 breaks down after two days (loose contacts). (with circuit diagram extract)
• S/C in EHT stage. (picture attached)
• Intermittent fault all over the screen or over an irregular width band leading to line foldover, similar to coded Canal Plus picture. (picture attached)
• Channel change impossible after a moment. Channel remains displayed and front LED becomes orange. (with circuit diagram extract)
• Black screen. Audio OK . (extract of circuit diagram attached)
• Operating voltage stabilises at 50V. (+ extract of circuit diagram)
• Dark picture. Picture rolls. Picture shifted to the left. Flickering picture. (+ extract of circuit diagram)
• Low brightness (even after turning up the preset in the U200 module).
• No TXT. (picture attached)
• Snow in picture. (picture attached)
• The standby thyristor blows. (extract of circuit diagram attached) (63KV5617 tips)
• Power supply blows when put into standby. (+ extract of circuit diagram)
• OSD partly disappeared from the screen in BL sets. (part of circuit diagram displayed)
• No audio. intermittently. (part of circuit diagram displayed)
• No function, only hums. (extract of circuit diagram attached)
• Poor regulation. (part of circuit diagram displayed) (63KV5617 SIERRA repair tip)
• Error message F7 appears in the first 2 mins. No operation possible. (with circuit diagram extract)
• No colours at start up 50% of the time on satellite channels. OK in HF and VCR. (picture attached)
• No audio. Picture OK . (with circuit diagram extract)
• Dark streak on screen.
• Intermittently line tearing in picture at the edges.
• Protective circuit starts up. (picture attached)
• Intermittent memory problem.
• No or poor synchronisation.
• Line output transformer failure.
• No colour in French standard. (+ extract of circuit diagram)
• Power supply BU blows after a few days.
• Error codes. (with circuit diagram extract)
• Horizontal line. Audio OK . (extract of circuit diagram attached)
• Doesn't switch into standby. Green LED goes orange and flashes after pressing standby key .
• No colour. intermittently. (extract of circuit diagram attached)
• U148V measures 20V.
• No picture and sound. Buzz from power supply transformer.
• Vertical lines. on the left. Excessive brightness. (picture attached)
• After a power supply fault caused by a storm video is defective. CTV in AV retains the picture of the TV programme which is being watched. Sound cuts out but OSD EX1 appears and the channel no. remains. (with circuit diagram extract)
• On channels 2 and 4 vertical lines on the left hand side of the picture.
• Ragged picture.
• 6cm black bar at bottom of picture.
• Line output transistor defective. (+ extract of circuit diagram)
• Coloured spots in picture (local dooming). (part of circuit diagram displayed) (SIERRA - 63KV5617 information)
• Vertical deflection is defective. Picture present, after a short time a line appears then picture disappears. (with circuit diagram extract)
• +120V instead of +148V. (with circuit diagram extract) (service info for SIERRA -63KV5617)
• Smoke from +12V resistor. (extract of circuit diagram attached)
• No linearity. (with circuit diagram extract)
• Reduced format, flyback line slightly visible. (+ extract of circuit diagram)
• Poor RC sensitivity.
• Searches for channels continuously. (picture attached)
• White screen. Flyback lines. Shuts down. after a few seconds. (extract of circuit diagram attached)
• Switches immediately to protection mode. Functions OK when protection mode is switched off. (+ extract of circuit diagram)
• Control micro processors.
• With Blackline picture tubes in the EXT1-Mode a white field is visible on the right side.
• No vertical deflection. intermittently. (part of circuit diagram displayed)
• SOPS power supply repeatedly becomes defective. (part of circuit diagram displayed)
• Starts without picture and audio then switches off after a few seconds. (63KV5617 SIERRA repair tip)
• Loud noise. (+ extract of circuit diagram)
• No audio. when cold. No OSD. when cold. (with circuit diagram extract)
• Stop via RC, no red dot. No start up by pressing simultaneously on the switch and programme of the RC. On the contrary, stop and switch on via the switch functions. (part of circuit diagram displayed)
• Low contrast. (part of circuit diagram displayed)
• Repeated failure of CRT. (service info for SIERRA -63KV5617)
• Poor field linearity.
• Functions with an automatic transformer up to 110, 120V. (extract of circuit diagram attached)
• S/C on deflection circuit. (extract of circuit diagram attached)
• BUT18AF blows in standby on the collector. (picture attached)
• Vertical defective, too large line space in upper picture third. Linearity fault. (part of circuit diagram displayed)
• Frizzy lines on the picture. (63KV5617 tip from SIERRA)
• No E/W correction. (+ extract of circuit diagram)
• After approx 10 minutes startup picture randomly disappears then reappears. No TEXT, only a mass of lines.
• East/west raster distortion: width and shaping control do not function.
• Tuning does not function, drifts, raster doubles up. Vertical sychronisation fault. (+ extract of circuit diagram)
• Dark picture with thin vertical stripe in upper picture. (+ extract of circuit diagram)
• Brightness differences in picture. (part of circuit diagram displayed)
• Horizontal shift no function.
• Vertical synchronisation fault when hot and presence of white line, then picture disappears (extract of circuit diagram attached)
• Dark background and a band of colour on the right. (extract of circuit diagram attached) (SIERRA - 63KV5617 information)
• Vertical roll. when cold. (part of circuit diagram displayed)
• No sound or vision, display going to F1.
• No picture. Bright raster. Flyback lines. Audio OK . (with circuit diagram extract)
• The sound fails: after changing over to a different channel, the sound is back. (extract of circuit diagram attached)
• Picture is too big or too small during horizontal amplitude adjustment.
• Wavy picture. at top.
• Hum bar.
• No functions. intermittently. LED blinks . Shuts down. (with circuit diagram extract)
• Dark screen. in TXT.
• BU508 blows after 1 or 2 days. (with circuit diagram extract)
• The line transistor blows after 5 minutes. (part of circuit diagram displayed)
• Orange spots on the right of the screen.
• No sound when input connection made via 2 S-VHS phono sockets.
• Top of TXT waves from side to side. (+ extract of circuit diagram)
• Picture jitters and vertical bars distorted on cross-hatched pattern. Blue horizontal bars. (picture attached)
• The picture is indented (horizontally).
• Blows components. at start-up. (extract of circuit diagram attached)
• Arcing. Picture tearing. Does not synchronise. (+ extract of circuit diagram)
• PCD8582 and X2402 memory. (with circuit diagram extract)
• Reduced vertical size. (picture attached)
• Mono/stereo display error. (extract of circuit diagram attached)
• Dead set caused by lightning damage. (picture attached)
• Over oscillations below collector BUT18. (part of circuit diagram displayed)
• White picture on the right side in EXT1 mode.
• Vertical collapse. (extract of circuit diagram attached)
• Reduced horizontal size. after a while. (picture attached)
• Blows chopper transistor. (extract of circuit diagram attached)
• No sound or picture. Appliance appears to be in AV. (+ extract of circuit diagram)
• Service mode
• Black stripe on left edge of screen. Horizontal linearity is not correct. (+ extract of circuit diagram)
• Coloured flash on channel change and VCR features. (+ extract of circuit diagram)
• Goes dead when switched to standby by RC. No standby LED. Switching on and off at mains, restores normal functions (part of circuit diagram displayed)
• Distorted audio.
• Low picture amplitude. Barrell-shaped picture. (with circuit diagram extract)
• Poor picture synchronisation during station switch-over. Vertical picture jitter, runs through, poor picture via RF or EXT. (picture attached)
• Vertical shaking. (+ extract of circuit diagram)
• The front control panel changes channels upwards but not downwards. All other functions OK.
• Poor E/W adjustment. Picture is narrow in the middle. (with circuit diagram extract)
• Occasionally BUT18 blows in standby. (part of circuit diagram displayed)
• No picture. after a while. White screen. (part of circuit diagram displayed)
• Picture flickers the first 5 minutes. Gradually becomes less but very visible in the dark portions of the screen.
• HT varies intermittently. (63KV5617 tips)
• No picture. Audio OK . (+ extract of circuit diagram)
• Power supply problem. (with circuit diagram extract) (service info for SIERRA -63KV5617)
• Noise in picture. (extract of circuit diagram attached)
• Secondary voltages fall when loaded. (with circuit diagram extract)
• No blue. (extract of circuit diagram attached)
• Red LED blinking for 3 secs.
• Defective SOPS. (extract of circuit diagram attached)
• Difficult horizontal and vertical adjustment and sawtooth at the side. (part of circuit diagram displayed)
• PSU repair. (picture attached)
• Lines in picture. on the left.
• No output voltage. (63KV5617 tip from SIERRA)
• Functions but heat sink gets very hot after 10 mins. When put into standby, noise in the PSU. (+ extract of circuit diagram)
• No picture at switch on but after a few minutes picture appears with weak contrast. Picture improves gradually and after approx 30 mins is normal. (part of circuit diagram displayed)
• Transistor 7545 (BU508AF) is blown. (with circuit diagram extract)
• Undefined STEREO mono switch over. OSD mono STEREO display present. (part of circuit diagram displayed)
• Doesn't function with dummy load. (extract of circuit diagram attached)
• Line tearing and picture quiver at the edges.
• Single dark lines in picture centre.
• Blurry picture.
• Dark picture. intermittently. (with circuit diagram extract)
• No button operation. intermittently. (+ extract of circuit diagram)
• POR signal too low. (+ extract of circuit diagram)
• Thyristor pos. 6670 fails. (part of circuit diagram displayed)