TXC81 / OTTOVERSAND [TV]

• Vertical collapse. (with circuit diagram extract)
• Intermittent loss of tuning memory.
• Tuning goes off with ticking. (extract of circuit diagram attached) (TXC81 tips)
• Power supply running, but no HT on line output transistor.
• Shuts down. after a few minutes. (+ extract of circuit diagram)
• Horizontal lines in top half of picture when cold. Entire picture trembles.
• Intermittently picture impairment with noise.
• Stripes, double lines and distorted picture. (extract of circuit diagram attached)
• Intermittent colour. (part of circuit diagram displayed)
• No picture. Squealing from PSU. Audio OK . (+ extract of circuit diagram)
• The sound is normal but only a poor washed out picture, i.e. no contrast. The picture can sometimes hardly be seen, consisting of just a slight movement of shaded greys on the raster. Or the screen might be completely blanked out. (+ extract of circuit diagram)
• Frame distortion, line doubling. (extract of circuit diagram attached)
• No synchronisation. (part of circuit diagram displayed)
• No sound. No picture. Whistle when pressing mains switch.
• White flashes in picture and/or intermittent operation and/or horizontal sync dropout intermittently.
• E/W fault (intermittently). (with circuit diagram extract)
• Dead. Channel display on . (with circuit diagram extract)
• Bad distortion, line doubling and horizontal striations were all present at once. (+ extract of circuit diagram) (TXC81 OTTOVERSAND repair tip)
• Intermittent black lines on right hand side of picture. (picture attached)
• Poor frame scan. (picture attached)
• Noisy NICAM. (OTTOVERSAND - TXC81 information)
• Intermittently flickers and powers down. (picture attached)
• Dead, channel number lit; may come on for short time then turns off but neon display remains. (extract of circuit diagram attached)
• One colour missing.
• One colour high.
• Horizontal lines. Unstable picture.
• Q551 running very hot and blowing R567 after approx. 4hrs. (extract of circuit diagram attached)
• Chirping. Display OK .
• Cuts out when warm. Works well without the cabinet.
• Unlocked colour. (extract of circuit diagram attached)
• Defective or erratic oscillating colours.
• Raster is blank, video, sound and display are missing and no remote control response. (with circuit diagram extract)
• Distorted picture and poor synchronization via SCART. No colour via tuner.
• Cannot be switched properly to standby, sound muted after pressing standby key on RC, programme display disappears and standby LED lit, picture still present.
• Reduced horizontal size. (picture attached)
• No channel storing. (+ extract of circuit diagram)
• No sound, blank raster and unlocked channel numbers.
• Intermittent colour and insufficient colour at max setting of colour control. (extract of circuit diagram attached)
• Line output stage is defective. Line BU is defective. After replacement the same fault reoccurs. (part of circuit diagram displayed)
• Erratic colours. (+ extract of circuit diagram) (TXC81 OTTOVERSAND repair tip)
• Tuning drifts (intermittently).
• Colour not right. (+ extract of circuit diagram)
• No blue after 30 mins. (extract of circuit diagram attached)
• Defective or erratically oscilating colours.
• Intermittently dead. (with circuit diagram extract)
• Vertical distortion. Horizontal deflection with vertical stripes and pairing effect.
• After 3-4 hours a faint line appears at the top of the screen. (with circuit diagram extract)
• Picture twists horizontally causing E/W distortion when warm.
• Sound is slightly distorted. (with circuit diagram extract) (TXC81 tip from OTTOVERSAND)
• Intermittently no line hold. (picture attached)
• Low audio from right hand side loud speaker. Crackling scart socket.
• No light (Y signal) in reception via tuner nor via SCART input. TXT and OSD OK.
• No STEREO sound.
• No sound and picture. Channel switch over OK.
• Hum, crackling, and other secondary noises via headphones and loudspeaker with high volume and volume "0".
• No horizontal oscillation signal. Whistle from PSU often.
• Chirping. (with circuit diagram extract)
• Set operated perfectly for an hour, then the sound would mute and controls wouldn't work. (picture attached)
• No colour sync. (TXC81 tips)
• No NICAM sound. (TXC81 tip from OTTOVERSAND)
• Power supply hissing for approx 3 secs at start up and goes to safety mode. Programme display visible all the time.
• No picture (intermittently). Audio OK . (+ extract of circuit diagram)
• No E/W correction. (TXC81 tips)
• Faulty TXT. (part of circuit diagram displayed)
• Line transistor BU508D fails again straight away immediately after switch on. (part of circuit diagram displayed)
• Coloured bars across screen. (picture attached)
• Power supply overloaded and squealing.
• Red picture with flyback lines.
• White lines on top of screen.
• Vertical stripes like strings of pearls in picture.
• Resistor R802 always blows. (picture attached)
• LED briefly lit after switch on, then progr. 1 or 2 starts. No other entries possible. No picture and no sound.
• No picture. Flyback lines. No audio. Raster OK .
• Tries to switch on for 1 sec and then stops. LED and channel no. remain lit. (+ extract of circuit diagram) (TXC81 tips)
• Poor picture. Low contrast. (part of circuit diagram displayed)
• After approx 1 hour the picture becomes approx 3cm too small at the right edge.
• Faint line down right hand side of screen. (extract of circuit diagram attached)
• Power supply starts up, pulsates 3-4 times and then goes into standby
• Line output stage transistor fails after a while.
• Picture full with stripes, when adjusting the horizontal size the fault disappears.
• No vertical synchronisation.
• No audio. No picture. Channel indicator OK. (service info for OTTOVERSAND -TXC81)
• After a few hours edges bow. (extract of circuit diagram attached)
• After turning on the set goes to standby but the LED will not light. (+ extract of circuit diagram)
• No channel tuning after channel 36. A horizontal bar runs through on the picture then search continues. Tunes the channels below channel 36.
• Intermittent colour and saturation is low. (picture attached)
• Comes on for a short time. (extract of circuit diagram attached)
• Text fault. Channel flag is present and stable, but there are no bar graphs for colour, sound etc. When the set is switched to the teletext mix mode, a perfect text display is produced. (part of circuit diagram displayed)
• Nicam Crackle. (TXC81 OTTOVERSAND repair tip)
• No picture. No sound. Standby LED lights up. If switched on with the RC, channel display appears and can be switched over.
• Erratic colour. (extract of circuit diagram attached)
• Shuts down (intermittently). (part of circuit diagram displayed)
• After working for a couple of minutes, picture sync is lost then the screen goes black. Power supply shuts down and squeals. (picture attached)
• No bar graphs. No TXT. TXT OK in mix. (part of circuit diagram displayed)
• E/W fault. (with circuit diagram extract)
• Lines in picture. at bottom. (+ extract of circuit diagram)
• Distorted audio. (with circuit diagram extract)
• Blank raster. No RC functions. (+ extract of circuit diagram)
• IC801 intermittently blown. (with circuit diagram extract)
• Bright red raster.
• Unstable picture. Hum in audio. Colour flickers. (service info for OTTOVERSAND -TXC81)
• Picture sync goes then picture disappears. (part of circuit diagram displayed)
• RC problems. (with circuit diagram extract)
• Picture not locked and/or no text, will lock if the text button is pressed or set is put into AV then back to TV.
• Starts up, line transformer starts up then cuts out. Channel display remains. (OTTOVERSAND - TXC81 information)
• Distorted audio from left hand channel.
• TV starts up, EHT starts up then cuts out. Channel display remains.
• No function. Loud cracking from the main PSU. (TXC81 OTTOVERSAND repair tip)
• Foldover at top and picture vibrates.
• Line BU fails at irregular intervals.
• No start-up. LED blinks .
• No blue.
• Extreme field distortion. (extract of circuit diagram attached)
• No TXT; picture unlocked until TXT button pressed or set to AV position. (with circuit diagram extract)
• Sound and picture are missing, channel change ok. (+ extract of circuit diagram)
• Extremely weak contrast, controls have no effect. (part of circuit diagram displayed)
• Horizontal dark bars across the picture. (+ extract of circuit diagram)
• Picture is shifted inwards at the right side. Fault occurs after approx 15 mins.
• Poor sync and colour. Picture becomes better after a while but with horizontal coloured bars. Hum in audio.
• Flashover voltage in PSU.
• Q551 fails again after a short time.
• Faulty teletext. Channel flag and bar graphics drift aimlessly across the screen while the text is erratic with flashing white lines on the background. (extract of circuit diagram attached)
• Ragged raster. Picture lines run through each other.
• Set only works after several attempts to switch on. Switch is ok. (picture attached)
• Colour varies. (with circuit diagram extract)
• Squealing from PSU. (+ extract of circuit diagram)
• No picture. No sound. Squeals. Channel numbers lit. (picture attached)
• Picture width quivers. Intermittently picture drops out. (TXC81 tip from OTTOVERSAND)
• No vertical deflection. (with circuit diagram extract) (TXC81 tip from OTTOVERSAND)
• TV goes into safety mode at switch-on.
• Dent in right side of picture after a prolonged operating time (after 1.5hrs). After cooling down picture OK again. (extract of circuit diagram attached)
• If left on teletext, white beating bars appear over text.
• Switches to standby (after start-up). (extract of circuit diagram attached)
• No picture, no high voltage, power supply squeaks, sound present. (extract of circuit diagram attached)
• Fine lines on top of picture.
• Picture bows in from the sides intermittently or permanent. (extract of circuit diagram attached)
• Dead after a burst of EHT.
• Excessive horizontal size. E/W fault. (picture attached)
• When warm picture shift to the right then line oscillation is defective.
• Bright red screen.
• Intermittent or no colour. (extract of circuit diagram attached)
• Starts up, then no function from remote or main controls.
• When appliance is warm tuning problems occur. (part of circuit diagram displayed)
• Snow on picture and low gain. (extract of circuit diagram attached)
• Repeated failure of field output chip IC451 (AN5521).
• Sound is distorted from either left or right hand channel. (+ extract of circuit diagram)
• Appliance squeaks very loud. No picture. No sound.
• Intermittently picture disappears leaving dark grey raster. (+ extract of circuit diagram)
• Intermittent audio. (extract of circuit diagram attached)
• No Nicam sound, neither Nicam nor mono symbol seen on display. (with circuit diagram extract)
• No HV.
• Switches off by itself. after warm-up. (part of circuit diagram displayed)
• Blue screen only. No sound but channel indicator is working & will change channels when selected.
• PSU whistles.
• Intermittent line output stage operation. (extract of circuit diagram attached)
• Memory IC defective.
• Saturated picture in red, green or blue. (part of circuit diagram displayed)
• EHT fails within 2 secs after switch on.
• No picture. Audio OK . (part of circuit diagram displayed)
• Red, green or blue picture. (+ extract of circuit diagram)
• Pincushion distortion.
• Failure of line output transistor Q551 (2SD1441RL). (+ extract of circuit diagram) (TXC81 tip from OTTOVERSAND)
• How to check main PSU.
• Strong chirping after switch on. No channel appears.
• Picture and sound are missing, channel change ok. (TXC81 OTTOVERSAND repair tip)
• Blue background on teletext and OSG but picture OK. (part of circuit diagram displayed)
• No synchronisation. No picture. Shuts down. (part of circuit diagram displayed)
• Appliance blocks occasionally, all basic values are set to minimum, all additional displays (stereo, three-dimensional sound etc.) light up. If the main switch is switched off then on again then everything is ok. (OTTOVERSAND - TXC81 information)
• Hissing noises after switch on
• Video seems off tune. (picture attached)
• Line doubling/distortion/striations. (+ extract of circuit diagram) (TXC81 tips)
• Flyback lines. at top.
• No synchronisation. in TXT. (with circuit diagram extract)
• Horizontal green and magenta bars running through picture. (extract of circuit diagram attached)
• Sound muting and no function of the controls after an hour approx. (extract of circuit diagram attached)
• Intermittent whistle. (extract of circuit diagram attached)
• Poor synchronisation. (picture attached)
• Intermittently goes dead with loud whistling. (picture attached)
• Doesn't switch completely off from standby. Program display disappears. Standby LED lights.
• Intermittently whistles. (with circuit diagram extract)
• Occasionally picture and sound disappear. (picture attached)
• Squeals at switch on then dies except for channel number indicator. (+ extract of circuit diagram)
• Switches to standby.
• Tuning is slightly off. Dark screen with zigzag lines. Intermittent flashes of chroma and sound mutes.
• Dead. (+ extract of circuit diagram)
• Lines in picture. at top. (+ extract of circuit diagram)
• No luminance but chrominance in the display.
• Loss of text sync/no channel identification lock. (with circuit diagram extract)
• Set dead apart from a whine from the power supply. (extract of circuit diagram attached)
• Lines in picture.
• Tuning problems, would drift off tune after some time. (extract of circuit diagram attached)
• Poor colour. intermittently. (extract of circuit diagram attached)
• Reduced horizontal size. intermittently. (picture attached)
• Poor colour. (with circuit diagram extract)
• Appliance hisses. No high voltage. Standby voltage is present. (picture attached)
• Bright lines on screen. (picture attached) (TXC81 tips)
• Red picture. Flyback lines.
• No start-up. Squealing from PSU. (picture attached)
• Powers up momentarily. (picture attached) (TXC81 OTTOVERSAND repair tip)
• East to West bowing. (with circuit diagram extract)
• Poor picture, contrast being very low irrespective of the customer control setting. (with circuit diagram extract)
• Squeal from PSU. Channel LED OK.
• Excessive brightness. No colour. (+ extract of circuit diagram)
• No or poor contrast. (picture attached)
• Picture pulls to right hand side. (picture attached)
• At switch on picture is snowy, flashes, then OK. (with circuit diagram extract)
• Poor picture and colour halo at sides of screen.
• Whistling from PSU. intermittently. (with circuit diagram extract)
• Approx. 5 horizontal bars from top of picture spaced about 8mm apart gradually fading out. note; If height reduced fault worsens and picture jitters with even more bars. (extract of circuit diagram attached)
• No functions.
• No display. No functions. No audio, only a dark blank raster. (with circuit diagram extract)
• Whistling in the power supply, depending on the load.
• No picture. No sound. Standby LED lights up. If switched on with RC, program display appears and it cannot be switched over. Runs ok for 4 hours acc to customer.
• Switches to protection mode (after start-up). (+ extract of circuit diagram) (TXC81 tip from OTTOVERSAND)
• No functions. Display OK . (+ extract of circuit diagram)
• No colour (intermittently).
• Mainly dark screen with zigzag lines. Some signs of chroma flash up intermittently and the sound is muted. (extract of circuit diagram attached)
• Picture folds over at sides. Then a vertical bar remains in the picture.
• Picture vibrates. Black lines in picture, especially in top half. (part of circuit diagram displayed)
• Smearing in picture.
• Only program display. No standby display
• Intermittent colour after a few hours, flickers off then on again. On maximum colour setting line paired more so on reds. (with circuit diagram extract)
• At switch on the sound mutes. The effect lasts for only about ten minutes and will not return until the next day. (extract of circuit diagram attached)
• Squealing from PSU (intermittently).
• No TXT. (extract of circuit diagram attached)
• Severe noises form PSU for approx. 5 sec, then switches off . Program display remains
• Power supply squeaks, speaker hums and twitters. (picture attached) (TXC81 tips)
• Dark picture via S-VHS input.
• Elusive Parts.
• Unstable OSG.
• No text, channel flag drifting. (+ extract of circuit diagram)
• PSU whistling. Channel indicator OK.
• Colour flickers.
• Whistle from speakers. Changes when adjusting contrast and/or brightness. Also fine horizontal lines in picture. (with circuit diagram extract)
• White bar (approx. 10cm) on top of the picture. (TXC81 tip from OTTOVERSAND)
• Vibrating picture and horizontal lines. (part of circuit diagram displayed)
• Distorted audio. on the left. (part of circuit diagram displayed)
• Picture right area is darker (shadowed) than rest of screen. (TXC81 tips)
• Line tearing. Pincushion distortion. on the right. (extract of circuit diagram attached)
• No audio. No picture. (+ extract of circuit diagram)
• Controls go faulty after a while. (part of circuit diagram displayed) (OTTOVERSAND - TXC81 information)
• TXT flashes on screen after 1 hour. Loss of sync on TXT. (with circuit diagram extract)
• Flyback lines. at top (intermittently). (extract of circuit diagram attached) (OTTOVERSAND - TXC81 information)
• Stations cannot be tuned in properly. (picture attached)
• No voltages from PSU.
• Intermittently no or low audio and crackling from right speaker. Sound OK on SCART socket. (OTTOVERSAND - TXC81 information)
• Intermittent audio. (part of circuit diagram displayed)
• Line output transistor S/C, R567 O/C and D854 S/C. (with circuit diagram extract)
• Switches to protection mode (after a few seconds). (part of circuit diagram displayed)
• Whistling at start-up. Programme number display functions. (TXC81 tips)
• Dead. Whining. Channel numbers OK. (+ extract of circuit diagram)
• Horizontal lines at the top part of the picture. OSD insertions slowly run vertically through the picture.
• No picture. No sound. Raster OK. CRT-filament lights, blocked on channel 0. (service info for OTTOVERSAND -TXC81)
• Picture goes red.
• Comes on then switches to standby leaving three blobs of colour in the centre of screen. (part of circuit diagram displayed)
• Noisy NICAM. (TXC81 tip from OTTOVERSAND)
• Poor vertical line across right side of picture.
• Reduced vertical deflection. (TXC81 tip from OTTOVERSAND)
• No picture. (part of circuit diagram displayed)
• No raster. (picture attached)
• Horizontal tearing.
• Switches off by itself. after a few minutes.
• Reduced vertical size.
• No luminance signal. Chroma is present.
• Muted audio. (part of circuit diagram displayed)
• Blank raster. OSD OK . (TXC81 tips)
• No TXT, unstable channel number. (with circuit diagram extract) (TXC81 tips)
• Intermittent whistling noise when set first switched on.
• Distorted speaker on right hand side.
• Dark screen.
• Power supply does not start up. Standby LED does not light up.
• PSU pulsates. (TXC81 tip from OTTOVERSAND)
• Fuzzy picture. (+ extract of circuit diagram)
• Dark picture with test lines when cold.
• No text although the channels flags are normal. (+ extract of circuit diagram)
• Appliance fizzes then width comes in. (part of circuit diagram displayed)
• Picture width quivers.
• No colour, or colour flashes on and off. (picture attached)
• Line output transistor fails repeatedly. (with circuit diagram extract)
• No or intermittent loss of video signal. (with circuit diagram extract)
• Dark picture.
• Picture turns red after a short while in operation.
• Shuts down (after a few seconds). Squealing from PSU. (TXC81 tips)
• From standby will not switch on, LED display comes on. Standby LED stays on. (picture attached)
• Exits standby and stops. Channel no. remains lit.
• Blank raster. Audio OK .
• Black screen. Display OK .
• No sound for the first half hour after switch on. (with circuit diagram extract)
• Loss of sound.
• Channels 1 and 4 intermittently not tuneable - frequency not lockable.
• After about half an hour's use and when a different channel is selected, the channel information derived from the text flashes unlocked across the screen. There is also loss of teletext synchronisation. (part of circuit diagram displayed) (TXC81 tip from OTTOVERSAND)
• No start-up (intermittently). (with circuit diagram extract)
• No tuning.
• After about four hours operation the safety resistor R567 in the HT feed to the line output stage blows. This is accompanied by various shrieks and whistles. (part of circuit diagram displayed)
• Chirping. Line tearing. after a while.
• Stuck in standby. (+ extract of circuit diagram)
• Buzzing from PSU.
• Black screen.
• No audio.
• Fizzle noise after turning on. (TXC81 tips)
• No picture or sound intermittently. Program display is present.
• Elusive Parts.
• No picture (intermittently). (part of circuit diagram displayed)
• No sound for the first half an hour. (with circuit diagram extract)
• No audio from right hand side loud speaker. Crackling scart socket.
• Low colour amplitude. (+ extract of circuit diagram)
• No convergence. (TXC81 tips)
• No audio for 10 mins. (with circuit diagram extract)
• No synchronisation via SCART and TV.
• No line drive. (part of circuit diagram displayed)
• No blue. after a while. (+ extract of circuit diagram)
• Line BU is S/C.
• Q552 (2SD1441) S/C. (part of circuit diagram displayed)
• No control possible after 10 secs.
• Looks like text line at top 3" of picture.
• No brightness. Audio OK .
• Switches off. No control possible. Program display OK.
• Loss of text sync after 1 hour. (extract of circuit diagram attached)
• No sync on OSD or text. Usually no text at all, just moving blank screen. (with circuit diagram extract)
• Line output transistor fails repeatedly. after start-up.
• Screen doesn't light up. Sound OK.
• Intermittent colour, sometimes flashes orange, green then blue then disappears altogether. (with circuit diagram extract)