774270 / OTTOVERSAND [TV]

• In standby tries to operate spontaneously. (extract of circuit diagram attached)
• When put into standby tube remains lit. Picture cuts out normally. (with circuit diagram extract)
• 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. (with circuit diagram extract)
• Distorted picture. (with circuit diagram extract)
• F4 displayed. LED flashes green then orange for slightly less than a sec. (+ extract of circuit diagram)
• Finds emitters during channel search but does not stop. (with circuit diagram extract)
• Impossible to adjust horizontal shift of picture using R3595. (with circuit diagram extract)
• Poor audio. only on certain channels. Crackling audio.
• Sound was OK but there was no vision for the first 10 mins after switch on. (picture attached)
• PSU chirps. (with circuit diagram extract)
• BUT18AF blows in standby on the collector. (part of circuit diagram displayed)
• Distorted vertical lines at top and bottom of monoscope. E/W correction is faulty. (picture attached)
• Intermittent colour.
• Picture varies with beam current. (+ extract of circuit diagram)
• Chroma fault in SECAM. (extract of circuit diagram attached)
• Horizontal output stage fails again after some time. (picture attached)
• To give improved protection to the BUT11AF chopper transistor TR7665.
• Noise in picture. (part of circuit diagram displayed)
• After switch on the picture is sometimes shifted and a black horizontal bar appears in the centre of the picture. (+ extract of circuit diagram)
• Power supply is often destroyed when left in standby. (+ extract of circuit diagram)
• Quick diagnosis (extract of circuit diagram attached)
• Excessive blue.
• Horizontal deflection BU fails after a few hours.
• Crackling from FBT and black vertical bars on screen for a few secs after start up. (part of circuit diagram displayed)
• When switching on, HV part hums. No control function is possible. (with circuit diagram extract)
• Dead. Soft ticking sound.
• BUT18 is defective. (with circuit diagram extract)
• Line end-stage has no function.
• Replacing TDA2579. (picture attached)
• Power supply crackles when power supply is low. (with circuit diagram extract) (service info for OTTOVERSAND -774270)
• Shuts down. after a while. (part of circuit diagram displayed)
• Black stripe on left edge of screen. Horizontal linearity is not correct. (part of circuit diagram displayed)
• White picture with flyback lines. (part of circuit diagram displayed)
• Line end stage U/syst collapses to approx. 48V. (picture attached)
• White screen.
• Takes approx 1 minute to come on, will not switch to standby, sound mutes but pulsating picture remains. (extract of circuit diagram attached)
• Dark picture. Picture rolls. Picture shifted to the left. Flickering picture. (part of circuit diagram displayed)
• No switch on. Red LED flickers for 3 seconds.
• Doesn't function with dummy load. (with circuit diagram extract)
• Hum bar.
• No sound when input connection made via 2 S-VHS phono sockets.
• Replacement of TDA8451 (IC7305). (extract of circuit diagram attached)
• Slight E/W distortion. (with circuit diagram extract)
• Starts, but only raster. Display shows "F3". (with circuit diagram extract) (774270 OTTOVERSAND repair tip)
• Switches to protection mode. (with circuit diagram extract) (774270 OTTOVERSAND repair tip)
• Reduced horizontal size. after a while. (picture attached)
• Switches on for a few secs with extreme brightness. No picture. Sound OK. Goes into safety mode immediately after. (774270 tips)
• TV blocked in F3.
• OSD partly disappeared from the screen in BL sets. (picture attached)
• Lower picture third is dark. Upper picture is dispersed. (picture attached)
• At start up goes immediately into standby. 12C BUS blocks at 5V. (+ extract of circuit diagram)
• No E/W correction. Pincushion distortion. (picture attached) (OTTOVERSAND - 774270 information)
• 6cm black bar at bottom of picture.
• Poor frame linearity when cold. Picture is distorted vertically. (picture attached)
• Thyristor fails in PSU in standby. Otherwise appliance OK. (extract of circuit diagram attached)
• Poor vertical linearity. Horizontal size varies. (with circuit diagram extract)
• The bottom half of the raster is missing, with the top cramped.
• Transistor T7545 (BU508AF) becomes intermittently defective at program switch-over via "+" and "-" on user control.
• No start up. No front panel LED. Quiet noise from loud-speakers.
• Secondary voltages fall when loaded. (extract of circuit diagram attached)
• TS7625 (BUT 18AF) fails again. (extract of circuit diagram attached)
• No picture and sound. Buzz from power supply transformer.
• No TXT. Intermittent green dots or lines through picture. Black screen.
• Picture rolls. (+ extract of circuit diagram)
• Stuck on channel 1. (774270 tip from OTTOVERSAND)
• The standby thyristor blows. (picture attached)
• No power supply, protection circuit triggered. (part of circuit diagram displayed)
• No picture or narrow streak after warm-up. (+ extract of circuit diagram)
• 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. (+ extract of circuit diagram) (774270 OTTOVERSAND repair tip)
• With Blackline picture tubes occasional or random OSD insertion.
• Red standby light then dead at switch on. TV starts up on the variac. (part of circuit diagram displayed)
• No functions. No button operation. (picture attached)
• Line BU blows after a moment. (+ extract of circuit diagram)
• S/C in EHT stage. (picture attached)
• Trapezoid picture. No E/W correction.
• BU508 blows after 1 or 2 days. (extract of circuit diagram attached)
• References for transistors 7615 and 7612.
• No picture. when cold. (part of circuit diagram displayed)
• Green picture. after a while. (+ extract of circuit diagram)
• Dead. Error code F1 displayed. (774270 OTTOVERSAND repair tip)
• Squealing from PSU. after start-up. (part of circuit diagram displayed)
• Severe crossover distortion in left channel.
• Oval picture.
• The output transistor of the power supply is defective. BUT11AF or 2SC3973B.
• Vertical bars on channels 2 and 4 (picture attached)
• Line output transistor fails repeatedly. after start-up.
• Coloured spots in picture (local dooming). (picture attached)
• Beam current dependent picture width fault. (extract of circuit diagram attached)
• PSU no function.
• 148V does not go pass 20V. (part of circuit diagram displayed)
• The appliance functions correctly in standard B,G but the sound hums in F standard. (with circuit diagram extract)
• Intermittently blown Wickman fuse 1534. (service info for OTTOVERSAND -774270)
• R3368 and R3369 burn up at switch on. (picture attached) (service info for OTTOVERSAND -774270)
• No HT output voltage of 148V. Voltage is present (approx. 158V) when disconnecting HT coils connector. (extract of circuit diagram attached)
• Picture linearity error. Picture has shifted towards top. Picture folds over at the bottom.
• Line output transformer does not start up. (+ extract of circuit diagram) (774270 OTTOVERSAND repair tip)
• No synchronisation.
• Dark screen. LED is green. (+ extract of circuit diagram)
• Line output transistor defective. (picture attached)
• No start-up. intermittently. (with circuit diagram extract)
• BUT18AF fails repeatedly. (extract of circuit diagram attached) (774270 OTTOVERSAND repair tip)
• White picture and no amplitude when cold. Picture pumping. (with circuit diagram extract)
• Character error.
• Connection of a loop system to the TV.
• Line BU keeps failing. (extract of circuit diagram attached)
• No deflection. Horizontal line. (774270 tips)
• 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)
• Appliance starts up with the variac until it reaches 100V and then the appliance fails. (+ extract of circuit diagram)
• Dark screen. via tuner. Audio and OSD OK . (extract of circuit diagram attached)
• Line tearing and picture quiver at the edges.
• Picture is too big or too small during horizontal amplitude adjustment.
• Picture is too wide or too small when adjusting horizontal size.
• No start-up. Standby LED does not light. (+ extract of circuit diagram)
• White area visible on right side of screen in EXT1 mode of BL sets. (part of circuit diagram displayed)
• No start-up with mains switch after switched off from standby.
• Humming noise from transformer. in standby. (+ extract of circuit diagram)
• Reduced format, flyback line slightly visible. (with circuit diagram extract)
• No synchronisation. when cold. (picture attached)
• BU508 blows one min after HT transistor (BU508AF) has been replaced. Picture OK during this one min.
• Frizzy lines on the picture.
• Picture stretched at top, compressed at bottom with black bar. Picture improves when warm. (with circuit diagram extract)
• Red light flashes for approximately 3 seconds then zero.
• No picture. F4 lights up in the display. (picture attached)
• Mono/stereo display error. (part of circuit diagram displayed)
• Destruction of the power supply BU. (extract of circuit diagram attached) (OTTOVERSAND - 774270 information)
• Picture width changes according to its content. Linear distortion on right and left sides over 5cm (no ondulation).
• BUT11 becomes defective after 3 days of use. (picture attached)
• TXT problem. Some characters do not display.
• Vertical foldover. (picture attached)
• No sound at some stations or audio failure. Via scart OK.
• Line output transistor fails repeatedly. intermittently. (+ extract of circuit diagram) (OTTOVERSAND - 774270 information)
• No colour. intermittently. (picture attached) (774270 OTTOVERSAND repair tip)
• Intermittent line and raster synchro. (picture attached)
• Dark screen. No OSD. (+ extract of circuit diagram)
• Intermittent picture size.
• Excessive horizontal size. Picture size varies with picture content. (part of circuit diagram displayed)
• Protection for BUT18AF in PSU.
• Lines in picture. on the left.
• HV capacitor burns. (+ extract of circuit diagram)
• Snow on screen and no reception. F4 displayed on screen. Green LED lit. (+ extract of circuit diagram)
• Goes into safety mode if it is left in standby then switched on via the switch. Starts normally if speaker or HT O/C. (with circuit diagram extract)
• Appliance starts intermittently with no standby. (with circuit diagram extract)
• Intermittently green "F5" on screen, thereby very dark picture or TXT appears. (extract of circuit diagram attached)
• Replacing the EEPROM. (picture attached)
• Difficult horizontal and vertical adjustment and sawtooth at the side. (picture attached)
• Buzzing from PSU. Motorboating noise from speakers. in standby. (part of circuit diagram displayed)
• Picture jitters and vertical bars distorted on cross-hatched pattern. Blue horizontal bars. (extract of circuit diagram attached)
• Audio drop out or mute.
• Vertical linearity is upwards a little sharp. Picture has shifted upwards. (extract of circuit diagram attached)
• No picture. No audio. OK via SCART . (with circuit diagram extract)
• No raster. (extract of circuit diagram attached)
• Set can be turned off with RC, but not turned on. S.B. LED blinks. (with circuit diagram extract)
• After start up, PSU fails. (with circuit diagram extract) (774270 tips)
• TV locked by and keys. (774270 OTTOVERSAND repair tip)
• Functions with an automatic transformer up to 110, 120V. (picture attached)
• Picture collapses. Pincushion distortion. (+ extract of circuit diagram)
• Vertical roll. (picture attached)
• Low brightness (even after turning up the preset in the U200 module).
• Vertical deflection is defective. A piece is missing at the bottom and at the top the lines are pulled apart. (+ extract of circuit diagram)
• BUT11 in power supply defective after few days, or when in standby. (with circuit diagram extract)
• Flash over on picture tube print. (OTTOVERSAND - 774270 information)
• Dark picture. intermittently. (with circuit diagram extract)
• Functions but heat sink gets very hot after 10 mins. When put into standby, noise in the PSU. (picture attached)
• 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. (part of circuit diagram displayed)
• EHT problems. (part of circuit diagram displayed)
• Dark picture.
• Power supply problem. (extract of circuit diagram attached)
• No or poor synchronisation.
• Does not stop at stations. Station search OK. (part of circuit diagram displayed)
• After about 3 to 4 weeks of regular play, the BUT18 and the main fuse automatically blow. (part of circuit diagram displayed)
• Sometimes the BUT18AF goes defective. (with circuit diagram extract)
• Dead. Red LED blinks. (with circuit diagram extract)
• Protection of T7625 (BUT18AF). (+ extract of circuit diagram)
• Picture flickers for approx 5 mins after switch on when cold, then everything normal as soon as appliance reaches room temperature.
• Undefined STEREO mono switch over. OSD mono STEREO display present. (part of circuit diagram displayed)
• No start-up. (with circuit diagram extract) (774270 OTTOVERSAND repair tip)
• Blows components. at start-up. (with circuit diagram extract)
• Local dooming - spots in the picture.
• Reduced vertical size at bottom.
• Pincushion distortion at each side. Adjustment potentiometer does not correct fault. (picture attached)
• Vertical bar. on the left. (with circuit diagram extract)
• Humming noise from transformer. Line output transistor fails repeatedly. (part of circuit diagram displayed)
• Very loud sound at switch but normal at previous switch off. Adjustment OK.
• East/west raster distortion: width and shaping control do not function.
• Vertical synchronisation fault when hot and presence of white line, then picture disappears (+ extract of circuit diagram)
• One single line in the middle of the screen. (+ extract of circuit diagram)
• Appliance runs ok, but if remote used to switch to standby, appliance goes dead. (extract of circuit diagram attached) (774270 tip from OTTOVERSAND)
• No sound in scart. Sound and picture via the tuner. The appliance does not pick up anything. (with circuit diagram extract)
• No 9V. (extract of circuit diagram attached)
• Poor OSD. Unusual colour of some characters. (part of circuit diagram displayed)
• Picture and sound drop out. Appliance jumps to channel 1.
• Switches to protection mode. intermittently. (+ extract of circuit diagram)
• Poor field linearity.
• BUT11AF S/C. (picture attached)
• Displays error code F4. When you switch to standby again, F4 appears again. LED flashes. Only noise. (+ extract of circuit diagram)
• TV blocks on 600MHZ. If you do a frequency search, it goes through all frequencies but does not find any channels. (part of circuit diagram displayed)
• No MONO audio. STEREO OK . (extract of circuit diagram attached)
• Channel change impossible after a moment. Channel remains displayed and front LED becomes orange. (with circuit diagram extract)
• Red flashing when changing channels with VCR playback in the still, search modes or edit points in own recordings. (picture attached)
• Connection of a loop system to the TV.
• Excessive brightness. (+ extract of circuit diagram)
• Thyristor pos. 6670 fails. (picture attached)
• Search stops with good tuning.
• Cannot be switched to standby. After the first attempt appliance is blocked. (picture attached)
• The sound fails: after changing over to a different channel, the sound is back. (+ extract of circuit diagram)
• Error codes. (picture attached)
• Switching transistor in power supply goes short circuit (BUT18).
• No tuner reception. Search display functions well but appliance does not pick up any channel. (with circuit diagram extract) (774270 tip from OTTOVERSAND)
• 148V measures 60V. (extract of circuit diagram attached) (OTTOVERSAND - 774270 information)
• With high volume the appliance switches spontaneously to standby. (picture attached)
• The front control panel changes channels upwards but not downwards. All other functions OK.
• SOPS power supply repeatedly becomes defective. (with circuit diagram extract)
• No sound or vision, display going to F1.
• Does not switch to standby. Picture remains on screen. (extract of circuit diagram attached)
• No picture. Audio and OSD OK .
• Buzzing from PSU. in standby. (part of circuit diagram displayed) (774270 tips)
• The screen is white and there is no sound. The line transistor blows after 5 minutes. (picture attached)
• Dark picture with thin vertical stripe in upper picture. (picture attached)
• Weak contrast. No contrast control.
• Sound only at program switch-over. (picture attached)
• 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. (part of circuit diagram displayed)
• Red LED blinking for 3 secs. (service info for OTTOVERSAND -774270)
• Tuning does not function, drifts, raster doubles up. Vertical sychronisation fault. (+ extract of circuit diagram) (774270 tip from OTTOVERSAND)
• Orange spots on the right of the screen.
• Blows chopper transistor. (extract of circuit diagram attached) (OTTOVERSAND - 774270 information)
• Switching transistor T7625 has failed. (+ extract of circuit diagram)
• Defective T7545. (picture attached)
• No TXT, just lines on screen.
• Poor width regulation with brightness. (part of circuit diagram displayed)
• No luminance. (part of circuit diagram displayed)
• Poor linearity. (part of circuit diagram displayed) (774270 tip from OTTOVERSAND)
• Adjustment black line matrix.
• Horizontal line in the middle of screen.
• Power supply BU blows after a few days.
• POR signal too low. (+ extract of circuit diagram)
• Only grey picture after being struck by lightning. TXT also runs. (extract of circuit diagram attached)
• On channels 2 and 4 vertical lines on the left hand side of the picture. (774270 tips)
• One colour missing.
• Intermittent fault all over the screen or over an irregular width band leading to line foldover, similar to coded Canal Plus picture. (picture attached)
• High voltage unit is smouldered. (extract of circuit diagram attached)
• Repeated failure of CRT. (774270 tips)
• Low contrast. (+ extract of circuit diagram) (OTTOVERSAND - 774270 information)
• TXT has no function. TXT is activated but only dark screen.
• White screen. Flyback lines. Shuts down. after a few seconds. (part of circuit diagram displayed)
• Blocked. (extract of circuit diagram attached)
• Connection of the loop system to the TV. (774270 tip from OTTOVERSAND)
• No tuning. intermittently. (part of circuit diagram displayed)
• Picture looks as if it were encoded (like on C+ channel). Sound is OK.
• No functions. Power LED lit . (extract of circuit diagram attached)
• No audio. Picture OK . (part of circuit diagram displayed)
• No signal on the BUT11AF collector. (extract of circuit diagram attached)
• Green LED does not light up. Power supply oscillates. (+ extract of circuit diagram)
• Line transformer noise. (+ extract of circuit diagram)
• The resistors 3661 and 3662 burn in standby, TS7625 is also defective sometimes. (with circuit diagram extract)
• BUT11A fails after operating for long time. (with circuit diagram extract)
• Sound and picture pulsating (2 times a sec) only via tuner.
• Horizontal end stage BU508AF short circuits after different playing times. (extract of circuit diagram attached)
• Set not regulating after SOPS re-build of secondary side of PSU. (+ extract of circuit diagram)
• No picture, only horizontal stripe on top. Picture appears only after a long while. Then picture collapses to a horizontal stripe in the centre. (service info for OTTOVERSAND -774270)
• No colour. Coloured bars in picture. OK after a few minutes. (with circuit diagram extract)
• PSU repair. (+ extract of circuit diagram)
• Line transistor 7545 fails after approx. 3 secs. (with circuit diagram extract)
• Colour flickering during video editing.
• PSU defective. (picture attached)
• Shuts down. after a while. LED blinks . (774270 OTTOVERSAND repair tip)
• Line BU blows after operating for 3-5 mins. (part of circuit diagram displayed)
• Switches immediately to protection mode. Functions OK when protection mode is switched off. (+ extract of circuit diagram)
• Colour bar at right of screen. (picture attached)
• Top of TXT waves from side to side. (+ extract of circuit diagram)
• Type of transistor 7594 and value of resistor R3596.
• U system only 5V instead 148V. (with circuit diagram extract)
• Goes to blank screen with unlocked TXT lines when TXT selected.
• Vertical roll. when cold. (extract of circuit diagram attached)
• No picture, no sound. TV starts up and tube lights up. (with circuit diagram extract)
• Poor regulation. (picture attached)
• Horizontal, bright line.
• No audio. after a while. (+ extract of circuit diagram)
• Vertical defective, too large line space in upper picture third. Linearity fault. (with circuit diagram extract) (OTTOVERSAND - 774270 information)
• No red, green and blue go through correctly. TEA5101A and TDA8390 have been changed. (with circuit diagram extract)
• Local dooming / PP-settings. (picture attached)
• Over-voltage circuit active. (part of circuit diagram displayed)
• Black screen. intermittently. (part of circuit diagram displayed)
• No colour. when cold. Poor colour. after warm-up. (+ extract of circuit diagram)
• Picture flickers intermittently, sound disappears. Picture reappears by itself, sound doesn't but can be activated with the RC.
• Ticking sound. (with circuit diagram extract)
• PSU becomes defective after switch on via mains switch.
• Causes for appliance going into safety mode.
• No LED lit. (+ extract of circuit diagram)
• When switching on the appliance when it's cold, it takes about 35 seconds before the picture appears. (with circuit diagram extract)
• Vertical foldover at top and bottom. (part of circuit diagram displayed)
• Local dooming, especially with high contrast. (part of circuit diagram displayed)
• Line output stage periodically fails. (picture attached)
• No audio. (extract of circuit diagram attached)
• Tuning search does not stop when appliance has found a station. (extract of circuit diagram attached)
• Picture jitters. when cold. (extract of circuit diagram attached)
• Does not go into standby. LED becomes orange but picture remains. (+ extract of circuit diagram) (774270 OTTOVERSAND repair tip)
• After a few secs in standby, 7625 and fuse destroyed. (extract of circuit diagram attached)
• Smoke from +12V resistor. (part of circuit diagram displayed)
• No function. Buzzing noise. (extract of circuit diagram attached)
• PSU fails after a short time (S/C of BUT18AF). (with circuit diagram extract)
• Brightness differences in picture. (picture attached)
• R3653 burns. (with circuit diagram extract)
• No sound, even with in or out scart.
• Value of 3525 in the vertical amplifier situated in front of the line transformer towards tube 4 beside cushion 3521.
• Reduced vertical size. (picture attached)
• Contrast adjustment inoperative, colour streaks. (part of circuit diagram displayed) (774270 tips)
• Voltage too low. (picture attached) (OTTOVERSAND - 774270 information)
• Line pairing at top half of the picture (picture attached)
• Power supply goes into safety mode and crackles. (+ extract of circuit diagram) (774270 tip from OTTOVERSAND)
• U148V measures 20V. (774270 tip from OTTOVERSAND)
• Low contrast. in TXT. (picture attached)
• Wavy picture. at top.
• PSU has no function.
• Excessive vertical size. (+ extract of circuit diagram) (OTTOVERSAND - 774270 information)
• Tuning unstable. (picture attached)
• No sound or picture. Appliance appears to be in AV. (extract of circuit diagram attached)
• Power supply fuse (18A) defective after 1 hr or less. (extract of circuit diagram attached)
• No E/W.
• Intermittently BUT18 defective after switching on. (picture attached)
• Switching transistor of the SOPS power supply is defective. (picture attached)
• No teletext and OSD is hardly visible. The regular picture vibrates if appliance is switched to teletext. (with circuit diagram extract)
• 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)
• Capacitor 2545 in PSU burns. (extract of circuit diagram attached)
• With Blackline picture tubes in the EXT1-Mode a white field is visible on the right side.
• No vertical deflection. intermittently. (with circuit diagram extract)
• Thyristor goes S/C when switched to standby. (picture attached)
• Undefined Stereo-Mono switch over.
• Horizontal size varies. (with circuit diagram extract)
• Occasionally picture seems to be coded on all the channels especially when cold. (+ extract of circuit diagram)
• Chopper transistor failure. (+ extract of circuit diagram)
• No switch on. Noise from loud-speakers and smell of burning. (part of circuit diagram displayed)
• Stretched picture. at top. Reduced raster size. at bottom. (+ extract of circuit diagram)
• Secondary voltage cannot be adjusted lower than 160V. PSU however can be regulated with this voltage.
• Starts up again then clicks after a few mins. PSU faled again. (+ extract of circuit diagram)
• Contrast variations with subtitling in sets with BL-CRT. (with circuit diagram extract)
• No brightness. No audio. Raster OK . (+ extract of circuit diagram)
• No sound. No response to commands from both RC and front panel. Error message F2 on screen. Picture ok. (part of circuit diagram displayed)
• Power supply failure. (picture attached)
• Blows chopper transistor at switch on.
• Vertical shaking. (picture attached)
• Black screen. Audio OK . (part of circuit diagram displayed)
• Vertical collapse. intermittently. (with circuit diagram extract)
• Horizontal line. Audio OK . (part of circuit diagram displayed)
• Poor E/W adjustment. Picture is narrow in the middle. (+ extract of circuit diagram)
• Poor regulation of the power supply. (part of circuit diagram displayed)
• Picture pulsates on white background.
• No picture, no sound, no display, 148V is reduced to approx 50V.
• Black horizontal lines. (picture attached)
• Retrace lines. intermittently.
• Difficult to set up east/west and width controls. (picture attached)
• Arcing. Picture tearing. Does not synchronise. (with circuit diagram extract)
• No colour. (extract of circuit diagram attached)
• No linearity. (with circuit diagram extract)
• White square in a corner of the screen. (part of circuit diagram displayed) (service info for OTTOVERSAND -774270)
• White picture on the right side in EXT1 mode.
• No quick start pulse. (+ extract of circuit diagram)
• PSU varies according to picture content when warm. (picture attached)
• No picture. Audio OK . (with circuit diagram extract)
• S/C from point 18 at line transformer to the ground. (extract of circuit diagram attached)
• Discharging noise. via speakers.
• No adjustment from PSU possible. (+ extract of circuit diagram)
• 148=68V. (+ extract of circuit diagram)
• Jagged picture. (part of circuit diagram displayed)
• No start-up from standby with RC.
• Vertical size varies. Vertical jitter.
• Does not switch to standby. Horizontal line. LED blinks . (with circuit diagram extract)
• Too high power supply. (picture attached)
• No colour in SECAM and PAL. Colour may appear slightly in SECAM when warm. (part of circuit diagram displayed)
• Picture shifted vertically.
• Faulty TXT. No TXT. intermittently.
• Hum in audio. in standby. (extract of circuit diagram attached)
• No sound or picture. Snowy screen (picture with test signal). Vertical interference bars. (with circuit diagram extract)
• Horizontal stripe. (extract of circuit diagram attached)
• Local dooming. (+ extract of circuit diagram)
• Undefined Stereo Mono switchover.
• S/C in line output stage (7645). (with circuit diagram extract)
• Luminance takes a long time to appear. Distorted picture, focus pot does not react sufficiently. (part of circuit diagram displayed) (OTTOVERSAND - 774270 information)
• No colours. After approx an hour colours appear with fluctuations. (picture attached)
• Vertical sync does not stop. (extract of circuit diagram attached)
• Switches off intermittently. Standby LED (red-green) flashes. Picture drops out. (+ extract of circuit diagram)
• Picture leans too much to one side, Black line visible in the picture. (picture attached)
• Black screen. No brightness. Audio OK . (part of circuit diagram displayed) (774270 OTTOVERSAND repair tip)
• EXT1 switchover is defective, terrestrial program remains.
• Lacks contrast. No reaction on the plus or minus key of the contrast button. Other commands are ok. (774270 OTTOVERSAND repair tip)
• Frame shrinks horizontally when changing brightness. (picture attached) (OTTOVERSAND - 774270 information)
• Egg-shaped picture, picture is pushed upwards. Underneath 5cm black bar. (with circuit diagram extract)
• 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. (part of circuit diagram displayed)
• Shuts down. after a few minutes. (part of circuit diagram displayed)
• Line transistor S/C.
• BUT18 blows at 100V on the variac.
• No audio. F2 error.
• Dark screen. No picture. No RC functions. (picture attached)
• Ragged verticals.
• No chopper power supply. (+ extract of circuit diagram)
• Very low secondary voltages. (part of circuit diagram displayed)
• Videotext has turbulent text content in upper section.
• Line output transistor fails repeatedly. (picture attached)
• How to check the power supply without blowing BUT18AF.
• 5.1V incorrect. (with circuit diagram extract)
• No picture. intermittently. (extract of circuit diagram attached)
• Vertical collapse. (+ extract of circuit diagram)
• Line BU508blows after 3 days. (+ extract of circuit diagram)
• Colour blobs in the picture.
• No vertical deflection. Horizontal line. (picture attached)
• No control signal to IC7470 (TDA) and no line scanning. (+ extract of circuit diagram)
• When switched off with RC, does not switch on again and LED remains off. (extract of circuit diagram attached)
• Appliance fails and later comes back unprompted. (with circuit diagram extract)
• Loud noise. (+ extract of circuit diagram)
• Interference in picture. No picture. No audio. (extract of circuit diagram attached)
• Power supply too low (70V). (picture attached) (774270 tip from OTTOVERSAND)
• No switching into CCIR standard. Display ok in SECAM and PAL/SECAM. (extract of circuit diagram attached) (774270 OTTOVERSAND repair tip)
• Picture fault in tuner and scart.
• Switch on during standby only functions when RC is very close to the appliance.
• Vertical lines. on the left. Excessive brightness. (with circuit diagram extract)
• No picture. TXT OK . (part of circuit diagram displayed)
• PSU blocking. (extract of circuit diagram attached)
• Service mode (774270 OTTOVERSAND repair tip)
• +148V drops to 100V occasionally according to the tube output. (part of circuit diagram displayed)
• BU508 defective after switching channel (when appliance is warm). (with circuit diagram extract)
• Change in picture width depending on beam current. (extract of circuit diagram attached)
• Strange noise in loudspeakers. (with circuit diagram extract) (774270 tips)
• Reduced vertical deflection. intermittently. (picture attached)
• Extra protection for chopper transistor TR7625 (BUT18AF). (picture attached) (774270 tips)
• Reduced horizontal size. Vertical foldover. in the centre. (extract of circuit diagram attached)
• Faded picture. No contrast. (picture attached)
• Narrowing of line and frame then flashing of the picture. Screen turns dark after 10 mins. Picture ok when cold. (+ extract of circuit diagram)
• Unadjustable horizontal centering. (+ extract of circuit diagram)
• Thyristor TR7670 breaks down after two days (loose contacts). (extract of circuit diagram attached)
• Can not be switched off in Standby position. When starting, LED becomes orange and blows. (part of circuit diagram displayed)
• Low sound on channel A. (picture attached)
• Blows chopper transistor when switching on with remote. (+ extract of circuit diagram)
• Operating voltage stabilises at 50V. (part of circuit diagram displayed)
• No synchronisation. intermittently. (with circuit diagram extract)
• Mains fuse O/C and BUT S/C. (with circuit diagram extract)
• No blue. (with circuit diagram extract)
• Insufficient picture height which can be adjusted. Poor E/W.
• Modification: Colour decoder chip IC7260.
• Erratic functions. (extract of circuit diagram attached)
• Line output transformer overheats. (with circuit diagram extract)
• Poor vertical linearity. Reduced vertical deflection. (+ extract of circuit diagram) (service info for OTTOVERSAND -774270)
• In VCR there are only chroma lines. (+ extract of circuit diagram)
• Start with interfering voltage. (+ extract of circuit diagram) (774270 OTTOVERSAND repair tip)
• No button operation. intermittently. (part of circuit diagram displayed) (774270 tips)
• No red. (part of circuit diagram displayed)
• BUT transistor becomes S/C either at switch on or after a certain period of time. (picture attached)
• Chopper and line output transistors S/C. (part of circuit diagram displayed) (OTTOVERSAND - 774270 information)
• Chopper transistor (BUT18AF) fails if appliance is switched on from standby. (with circuit diagram extract)
• HT varies intermittently.
• End stage transistor BU508 fails repeatedly at switch on. (part of circuit diagram displayed)
• No regulation. (part of circuit diagram displayed)
• No picture, teletext and sound are fine. (part of circuit diagram displayed)
• Dark background and a band of colour on the right. (extract of circuit diagram attached)
• No output voltage. (774270 tips)
• Line output transistor fails repeatedly. after a while. (+ extract of circuit diagram) (774270 OTTOVERSAND repair tip)
• Excessive red.
• Intermittently screen blanks out. Random characters on screen.
• BUT18 and rectifier bridge blow every two days even after modifications.
• Reduced raster size. (with circuit diagram extract)
• Sound drops out.
• No sound or vision with F1 showing in the display.
• No TXT. (part of circuit diagram displayed)
• Blows components. after a few minutes. (picture attached)
• Horizontal white line. (picture attached)
• When switched to standby U1 becomes 60V. PSU goes to limiting. (with circuit diagram extract)
• Dark picture. at bottom. Stretched picture. at top. (with circuit diagram extract)
• S/C on deflection circuit. (part of circuit diagram displayed)
• No channels. (774270 tip from OTTOVERSAND)
• 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.
• Problems with flof TXT. Cannot find p.811 in spite of it being sent out. TXT header remains with subtitling. (picture attached)
• Single dark lines in picture centre.
• Loss of red, green or blue or excessive red, green or blue pictures.
• Blank screen. Audio OK .
• The power supply BUT18AF shorts after operating for 5 hours. (+ extract of circuit diagram)
• Control micro processors. (774270 tips)
• Horizontal stripe. intermittently. (extract of circuit diagram attached)
• Intermittently line tearing in picture at the edges.
• Poor NICAM sound from left hand speaker.
• No functions. intermittently. LED blinks . Shuts down. (with circuit diagram extract) (774270 tip from OTTOVERSAND)
• The picture is indented (horizontally).
• Intermittent failure thyristor 6670 in STANDBY mode. (part of circuit diagram displayed) (OTTOVERSAND - 774270 information)
• Raster signal problem. (OTTOVERSAND - 774270 information)
• Defective line transistor. (part of circuit diagram displayed) (774270 tips)
• Appliance hums in Standby.
• Blurry picture.
• Power supply is low when warm. (extract of circuit diagram attached) (service info for OTTOVERSAND -774270)
• Dark screen. in TXT.
• Line tearing and picture twitching at the sides of the picture.
• Does not switch on from standby. LED blinks and goes off or changes to red and then no more functions.
• Faulty TXT. (with circuit diagram extract)
• Loud noises from speaker. Picture OK .
• Picture green and purple in the E/W direction.
• Shuts down. LED is green. (+ extract of circuit diagram)
• Dead. intermittently.
• Supply transistor BUT18A becomes defective immediately after switching on the appliance. (+ extract of circuit diagram)
• Green spot after viewing a white object on the screen.
• No picture. after a while. White screen. (extract of circuit diagram attached)
• Pulsating, no start up. (picture attached)
• No horizontal synchronisation. when cold. (extract of circuit diagram attached)
• 100V power supply is approx 35V. (with circuit diagram extract)
• No colour in French standard. (+ extract of circuit diagram)
• Ragged picture.
• 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) (OTTOVERSAND - 774270 information)
• Low picture amplitude. Barrell-shaped picture. (with circuit diagram extract)
• No contrast control. (picture attached)
• Does not switch to standby. LED turns pink. Picture remains. Sound mutes. (picture attached)
• Distorted picture. at top. (with circuit diagram extract)
• BUT18 fails repeatedly. (part of circuit diagram displayed)
• Tuning search does not stop.
• Horizontal-BU 508AF has a s/c. After replacing this fails again after a few seconds. (+ extract of circuit diagram)
• Interference in picture. when cold. (+ extract of circuit diagram)
• T7637 blown. (extract of circuit diagram attached)
• Noise in audio.
• Appliance does not start up. Crackling. (part of circuit diagram displayed)
• Defective standby thyristor (SFOR5D43). (extract of circuit diagram attached)
• Intermittent memory problem.
• Picture flickers intermittently, sound disappears. Picture reappears of itself, sound doesn't but can be activated with the RC.
• Set functions with the variac but BUT11AF blows when appliance is plugged in. (extract of circuit diagram attached)
• Spare part info: values of C2546, C2547 and C2545, located on collector of T7545. (with circuit diagram extract)
• BUT18, R3570 and F1534 blow. (+ extract of circuit diagram)
• No function, only hums. (part of circuit diagram displayed)
• Set dead, power supply refuses to start. Also intermittent start and no standby (picture attached)
• Regulation does not function without a load. (with circuit diagram extract)
• No functions. intermittently.
• Dark picture. Audio OK . (picture attached)
• Defective BUT.
• Fails in standby. (picture attached) (774270 tip from OTTOVERSAND)
• Vertical collapse. after a few minutes. Audio OK .
• Memory loss. (with circuit diagram extract) (774270 tip from OTTOVERSAND)
• Flyback lines. intermittently.
• 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. (+ extract of circuit diagram)
• Line output transformer failure.
• Fails occasionally. (774270 tips)
• Usys voltage of line output stage collapses to approx 48V. (extract of circuit diagram attached)
• No audio. when cold. No OSD. when cold. (picture attached)
• When warm, there is a raster fault on the left. (picture attached)
• Vertical deflection is defective. Picture present, after a short time a line appears then picture disappears. (part of circuit diagram displayed)
• Primary PSU switches off. No standby LED.
• Mono/Stereo-indication switches. (+ extract of circuit diagram)
• Snow in picture. (with circuit diagram extract)
• No horizontal synchronisation. intermittently. (with circuit diagram extract)
• Appliance works fine for hours, but after switching off with the remote control the BUT18 and mains fuse go defective. (picture attached) (OTTOVERSAND - 774270 information)
• No E/W correction. (with circuit diagram extract)
• Sound is noisy.
• Blank raster. No tuning.
• Incorrect reception. 33V ok. Picture ok in scart. (service info for OTTOVERSAND -774270)
• No picture, only audio via SCART. "Off air" picture displayed.. (extract of circuit diagram attached)
• Poor horizontal centering. (picture attached)
• No functions. Red LED blinks. (extract of circuit diagram attached)
• Searches for channels continuously. (part of circuit diagram displayed)
• Transistor 7545 (BU508AF) is blown. (+ extract of circuit diagram)
• No vertical synchronisation. (part of circuit diagram displayed)
• Does not decode Canal Plus no the sound. Green LED flashes. (part of circuit diagram displayed)
• No tuning. when cold. (+ extract of circuit diagram)
• Cramped at bottom with slight foldover.
• Picture shakes.
• Red picture. after a while. (with circuit diagram extract)
• No picture. in E-E. Audio OK .
• No picture. Grey screen. Brightness control works normally. (picture attached)
• Intermittently dead. (extract of circuit diagram attached)
• No function. On start-up easy chirp is audible. (extract of circuit diagram attached)
• LED lights up for a moment. TV is dead. Light on the power supply sometimes functions. (part of circuit diagram displayed)
• Diode D6653 installation sops kit.
• The horizontal centering cannot be adjusted correctly. It may have shifted after the appliance has warmed up.
• Picture is stretched - begins 5cms from bottom of the screen and is missing approx 1cm East/West. Appliance functions. (extract of circuit diagram attached)
• Works correctly but power supply BUT11 blows after 3 weeks. (picture attached)
• Protection mode activated.
• Picture is not linear. Black bar at bottom of picture. (part of circuit diagram displayed)
• E-W output stage fails as soon as the appliance is switched on. Fuse 1534 (315mA) also fails. (+ extract of circuit diagram)
• Blue picture. after a while. (+ extract of circuit diagram)
• PSU fuse blown. (with circuit diagram extract)
• No PAL chroma.
• Buzz in audio. (part of circuit diagram displayed)
• Vertical shift incorrect, after replacing a 28" BL-CRT. (part of circuit diagram displayed)
• No colours at start up 50% of the time on satellite channels. OK in HF and VCR. (+ extract of circuit diagram)
• No picture. No display. Erratic functions. (picture attached)
• Poor picture. via tuner. (picture attached)
• PCD8582 and X2402 memory. (extract of circuit diagram attached)
• BUT18AF (T7625) becomes defective in standby. (extract of circuit diagram attached)
• Error message F7 appears in the first 2 mins. No operation possible. (extract of circuit diagram attached) (OTTOVERSAND - 774270 information)
• PSU voltage low at 20V. (picture attached)
• Does not switch to standby. No functions. at switch-off. (with circuit diagram extract)
• Slow start-up. Switches to standby. (extract of circuit diagram attached)
• Horizontal line. in the centre. (extract of circuit diagram attached)
• Transformation in K' (only for stereo versions). (with circuit diagram extract)
• 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)
• Defective SOPS. (extract of circuit diagram attached)
• Appliance works for 4 hours and then cuts out completely.
• Picture takes a long time to appear (several mins). (extract of circuit diagram attached)
• Slow start-up. (+ extract of circuit diagram)
• BU508AF fails repeatedly. (+ extract of circuit diagram)
• After approx 10 minutes startup picture randomly disappears then reappears. No TEXT, only a mass of lines.
• 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.
• 17V instead of 140V. (with circuit diagram extract)
• Ghosts and poor colours. (part of circuit diagram displayed)
• Vertical stripes at left picture edge via channel 2 and 4. (part of circuit diagram displayed)
• BU508, Q7593 and Q7594 are defective. (+ extract of circuit diagram)
• No picture and no sound. (extract of circuit diagram attached)
• Flickering text and apparent tuning drift. (OTTOVERSAND - 774270 information)
• Distorted audio.
• No picture. Bright raster. Flyback lines. Audio OK . (+ extract of circuit diagram)
• PSU transistor (BUT18A) becomes defective right after start-up.
• Trips. (part of circuit diagram displayed)
• PSU repeatedly blows up. (part of circuit diagram displayed)
• No light lit. (picture attached)
• Microprocessor/eprom screening plate. (with circuit diagram extract) (774270 tips)
• Starts without picture and audio then switches off after a few seconds.
• No HV. (picture attached)
• Nasal sound on channels 5 and 6. (+ extract of circuit diagram)
• Goes dead when switched to standby by RC. No standby LED. Switching on and off at mains, restores normal functions (+ extract of circuit diagram)
• Picture shifted to the right. Poor synchronisation. (extract of circuit diagram attached)
• Dark picture. No picture. via SCART. No audio. via SCART. No RC functions. (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.
• No functions. LED lit. . (part of circuit diagram displayed)
• No picture. on lower half screen. (+ extract of circuit diagram)
• 185V instead of 148V. When taking a measurement on collector of TZ 7652, bulb goes off. (extract of circuit diagram attached)
• +120V instead of +148V. (part of circuit diagram displayed) (774270 OTTOVERSAND repair tip)
• Dead. Humming noise from transformer. (+ extract of circuit diagram)
• Power supply blows when put into standby. (part of circuit diagram displayed)
• Occasionally standby thyristor 6670 S/C. (with circuit diagram extract)
• Width of picture pumps according to picture content and narrows with a strong white. (picture attached)
• Vertical foldover at top.
• Spare part info: Value of C2546 and C2545 near line output transformer.
• Distorted TXT. at top.
• Flashing picture. (+ extract of circuit diagram) (774270 tips)
• Lines on picture and sections blanked out. No TXT. (+ extract of circuit diagram)
• No picture. when cold. Audio OK . (extract of circuit diagram attached)
• Does not store settings. (+ extract of circuit diagram)
• CTV functions one day. (picture attached)
• Tuning drifts. after a while.
• Poor RC sensitivity.
• Set does not start-up after implementing SOPS kit. (with circuit diagram extract)
• Blows fuse. after a few hours. (with circuit diagram extract)
• No reset.
• Snow on screen and no tuner reception. F3 displayed on screen. Green LED on. (service info for OTTOVERSAND -774270)
• Negative picture when cold and sometimes intermittently. (with circuit diagram extract)
• As the set warms up the picture flashes cyan every few seconds. (part of circuit diagram displayed)
• On the test picture, distorted, vertical lines at top and bottom of the screen. (part of circuit diagram displayed)
• Dark streak on screen.
• 148V at approx 30V. (+ extract of circuit diagram)
• Light green picture despite adjusting. Impossible to get red. (+ extract of circuit diagram)
• Ballooning and incorrect picture linearity.
• Crackle a few seconds after Power On. (part of circuit diagram displayed) (774270 tip from OTTOVERSAND)
• Unstable AFC. Noisy picture. (+ extract of circuit diagram)
• S/C in 148V line. (picture attached)
• Volume uncontrollable. No brightness control.
• E/W fault. No E/W correction. (picture attached)
• Darker bar on left of screen. (part of circuit diagram displayed)
• Fuse and PSU BU (BUT18AF) defective.
• TV starts, has raster but no image and no sound. Display shows "FO". (part of circuit diagram displayed)
• No operation. (extract of circuit diagram attached)
• Picture size varies with picture content. (picture attached)
• Colour flickering during video editing.
• Doesn't switch into standby. Green LED goes orange and flashes after pressing standby key .
• Occasionally BUT18 blows in standby. (extract of circuit diagram attached)
• Wavy picture. via AV.
• Dead set caused by lightning damage. (extract of circuit diagram attached)
• Loss of colour or no colour. (774270 OTTOVERSAND repair tip)
• Intermittent power supply shut down, the picture goes off for a split second, the display flickering in sympathy.
• Picture takes some time to appear. Dark screen then TV stops. Round colour spot which slowly disappears. (picture attached)
• Picture is affected by frizzy lines occasionally with crackling noise in the speakers and perhaps with a burnt smell. (+ extract of circuit diagram)
• When cold, picture takes approx 2.5 mins to appear instead of 15 secs. When warm it takes 20 secs. (picture attached)
• Slow start-up. Audio OK . (picture attached)
• The line transistor blows after 5 minutes. (+ extract of circuit diagram)
• PSU blown.
• Switches to safety mode at approx. 110 V mains voltage. (part of circuit diagram displayed)
• Protective circuit starts up. (extract of circuit diagram attached) (774270 tip from OTTOVERSAND)
• If mains switched off when in standby, it does not start up again. Light off. (picture attached)
• Intermittent black picture with TXT. Intermittent TXT in picture.
• Page 811 appears spontaneously. (extract of circuit diagram attached)
• Over oscillations below collector BUT18. (+ extract of circuit diagram) (774270 tip from OTTOVERSAND)
• No horizontal synchronisation. (extract of circuit diagram attached)
• When warm, picture foldover and the line BU blows. (part of circuit diagram displayed)
• F5 displayed on a screen corner. Occasionally channels switch over to channel 1 or TV switches off.
• No picture. No brightness. No sound. Picture tube filament on.
• No tuning.
• Power supply falls to approx 40V AC on the variac. (extract of circuit diagram attached)
• Purity fault. (picture attached)
• Switches off during operation. When it is switched on again crackling is heard from HT. (with circuit diagram extract)
• Reduced horizontal size. intermittently.
• Horizontal shift no function.
• Frayed vertical lines. (with circuit diagram extract)
• Tripping. intermittently.
• No audio. intermittently. (with circuit diagram extract)
• Power supply breaks down. (picture attached)
• Vertical foldover at bottom. (picture attached)
• Coloured flash on channel change and VCR features. (picture attached)
• Channels run through. (with circuit diagram extract)
• 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)
• Poor chroma identification in Pal/Secam. On channels 5, 6 or with VCR, blue or red bands. (picture attached)
• Top of text is ringing. Intermittent text.
• Picture flickers the first 5 minutes. Gradually becomes less but very visible in the dark portions of the screen. (774270 OTTOVERSAND repair tip)
• Grey screen. (extract of circuit diagram attached)
• Poor picture synchronisation during station switch-over. Vertical picture jitter, runs through, poor picture via RF or EXT. (with circuit diagram extract)
• In Standby BUT18AF (T7625) becomes defective.
• Phase fault. (+ extract of circuit diagram)
• Hum in audio. (picture attached)
• Dark screen and bright bar at the top. Clock is strange. Sound present. (with circuit diagram extract)
• Fuse, bridge rectifier and BUT11 in PSU blow when in standby for 10 mins. (part of circuit diagram displayed)
• Chopper transistor (BUT18AF), rectifier diodes and mains fuse become defective instantly. (picture attached)
• +16V flashover. (extract of circuit diagram attached)
• No OSD. intermittently. (with circuit diagram extract)
• Only pulsates once. Resistor R3661 in the 5V rail is burnt.
• BUT18AF is defective and is destroyed when appliance is switched on. (part of circuit diagram displayed)
• No horizontal deflection. (picture attached)