TXC84 / OTTOVERSAND [TV]

• Colour flickers.
• Distorted audio. (picture attached) (TXC84 tips)
• No channel storing. (part of circuit diagram displayed) (TXC84 OTTOVERSAND repair tip)
• Picture folds over at sides. Then a vertical bar remains in the picture. (TXC84 tips)
• Poor picture, contrast being very low irrespective of the customer control setting. (part of circuit diagram displayed)
• Power supply running, but no HT on line output transistor.
• Power supply does not start up. Standby LED does not light up.
• No picture. No sound. Standby LED lights up. If switched on with the RC, channel display appears and can be switched over.
• 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.
• Erratic colour. (with circuit diagram extract)
• Comes on for a short time. (extract of circuit diagram attached)
• No bar graphs. No TXT. TXT OK in mix. (part of circuit diagram displayed)
• Repeated failure of field output chip IC451 (AN5521).
• No sound for the first half hour after switch on. (part of circuit diagram displayed)
• Blue background on teletext and OSG but picture OK. (extract of circuit diagram attached)
• Noisy NICAM.
• Elusive Parts.
• Low colour amplitude. (extract of circuit diagram attached)
• Resistor R802 always blows. (picture attached) (TXC84 OTTOVERSAND repair tip)
• Excessive brightness. No colour. (extract of circuit diagram attached)
• Dark screen.
• One colour missing.
• After 3-4 hours a faint line appears at the top of the screen. (+ extract of circuit diagram)
• Intermittent line output stage operation. (picture attached) (TXC84 tip from OTTOVERSAND)
• Line output transistor S/C, R567 O/C and D854 S/C. (+ extract of circuit diagram)
• Black screen. Display OK .
• Loss of text sync after 1 hour. (+ extract of circuit diagram)
• No functions.
• No audio from right hand side loud speaker. Crackling scart socket.
• Horizontal lines. Unstable picture.
• Dead, channel number lit; may come on for short time then turns off but neon display remains. (with circuit diagram extract)
• Whistle from speakers. Changes when adjusting contrast and/or brightness. Also fine horizontal lines in picture. (extract of circuit diagram attached)
• Picture vibrates. Black lines in picture, especially in top half. (with circuit diagram extract) (service info for OTTOVERSAND -TXC84)
• No sound. No picture. Whistle when pressing mains switch.
• No TXT. (part of circuit diagram displayed)
• Only program display. No standby display
• No TXT, unstable channel number. (+ extract of circuit diagram)
• Intermittently picture impairment with noise.
• One colour high.
• No or intermittent loss of video signal. (picture attached)
• Picture width quivers. Intermittently picture drops out.
• Shuts down (intermittently). (part of circuit diagram displayed)
• No control possible after 10 secs.
• If left on teletext, white beating bars appear over text.
• Unlocked colour. (+ extract of circuit diagram) (TXC84 tip from OTTOVERSAND)
• No picture. Flyback lines. No audio. Raster OK .
• Controls go faulty after a while. (+ extract of circuit diagram)
• Squeal from PSU. Channel LED OK.
• Picture right area is darker (shadowed) than rest of screen.
• Blank raster. OSD OK .
• Intermittent colour after a few hours, flickers off then on again. On maximum colour setting line paired more so on reds. (extract of circuit diagram attached) (OTTOVERSAND - TXC84 information)
• Line output stage is defective. Line BU is defective. After replacement the same fault reoccurs. (picture attached)
• Poor picture. Low contrast. (+ extract of circuit diagram)
• Line output stage transistor fails after a while.
• Lines in picture. at bottom. (picture attached)
• Reduced vertical size.
• Picture bows in from the sides intermittently or permanent. (picture attached)
• Intermittently picture disappears leaving dark grey raster. (part of circuit diagram displayed)
• No NICAM sound.
• Red picture with flyback lines.
• Set only works after several attempts to switch on. Switch is ok. (+ extract of circuit diagram)
• Noisy NICAM.
• From standby will not switch on, LED display comes on. Standby LED stays on. (with circuit diagram extract)
• No picture. Squealing from PSU. Audio OK . (picture attached) (TXC84 tips)
• Dark picture with test lines when cold. (OTTOVERSAND - TXC84 information)
• No function. Loud cracking from the main PSU.
• Screen doesn't light up. Sound OK. (TXC84 tips)
• Cuts out when warm. Works well without the cabinet.
• No colour sync.
• Pincushion distortion.
• Intermittently whistles. (picture attached)
• Hissing noises after switch on
• Line tearing. Pincushion distortion. on the right. (+ extract of circuit diagram)
• No functions. Display OK . (picture attached)
• Nicam Crackle. (TXC84 tip from OTTOVERSAND)
• Switches off. No control possible. Program display OK.
• No TXT; picture unlocked until TXT button pressed or set to AV position. (part of circuit diagram displayed)
• Poor sync and colour. Picture becomes better after a while but with horizontal coloured bars. Hum in audio.
• Frame distortion, line doubling. (extract of circuit diagram attached)
• Intermittent audio. (+ extract of circuit diagram)
• Sound muting and no function of the controls after an hour approx. (part of circuit diagram displayed)
• Distorted picture and poor synchronization via SCART. No colour via tuner.
• 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)
• Excessive horizontal size. E/W fault. (+ extract of circuit diagram)
• Fuzzy picture. (+ extract of circuit diagram)
• Channels 1 and 4 intermittently not tuneable - frequency not lockable.
• No luminance but chrominance in the display.
• Stations cannot be tuned in properly. (extract of circuit diagram attached)
• Line output transistor fails repeatedly. after start-up.
• Shuts down (after a few seconds). Squealing from PSU.
• No audio.
• Distorted speaker on right hand side.
• Extreme field distortion. (part of circuit diagram displayed)
• No sound, blank raster and unlocked channel numbers.
• Shuts down. after a few minutes. (part of circuit diagram displayed)
• Power supply starts up, pulsates 3-4 times and then goes into standby
• No blue.
• Video seems off tune. (extract of circuit diagram attached)
• Exits standby and stops. Channel no. remains lit.
• Looks like text line at top 3" of picture.
• Intermittent colour. (part of circuit diagram displayed)
• Blank raster. Audio OK .
• Tries to switch on for 1 sec and then stops. LED and channel no. remain lit. (part of circuit diagram displayed)
• No start-up. Squealing from PSU. (picture attached)
• Vibrating picture and horizontal lines. (extract of circuit diagram attached) (TXC84 tips)
• Set operated perfectly for an hour, then the sound would mute and controls wouldn't work. (+ extract of circuit diagram)
• White lines on top of screen.
• Reduced horizontal size. (+ extract of circuit diagram)
• Picture full with stripes, when adjusting the horizontal size the fault disappears.
• Line doubling/distortion/striations. (with circuit diagram extract) (TXC84 tips)
• Flyback lines. at top (intermittently). (with circuit diagram extract)
• Coloured bars across screen. (+ extract of circuit diagram)
• E/W fault (intermittently). (part of circuit diagram displayed)
• No picture. (with circuit diagram extract) (TXC84 tips)
• No text although the channels flags are normal. (+ extract of circuit diagram)
• Chirping. (+ extract of circuit diagram)
• After a few hours edges bow. (part of circuit diagram displayed)
• Mainly dark screen with zigzag lines. Some signs of chroma flash up intermittently and the sound is muted. (extract of circuit diagram attached) (TXC84 tip from OTTOVERSAND)
• Saturated picture in red, green or blue. (extract of circuit diagram attached)
• Dent in right side of picture after a prolonged operating time (after 1.5hrs). After cooling down picture OK again. (part of circuit diagram displayed)
• After turning on the set goes to standby but the LED will not light. (picture attached)
• 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. (part of circuit diagram displayed)
• No channel tuning after channel 36. A horizontal bar runs through on the picture then search continues. Tunes the channels below channel 36. (TXC84 tips)
• Red, green or blue picture. (part of circuit diagram displayed) (TXC84 tip from OTTOVERSAND)
• Poor frame scan. (picture attached)
• Tuning is slightly off. Dark screen with zigzag lines. Intermittent flashes of chroma and sound mutes.
• No blue after 30 mins. (picture attached)
• Stripes, double lines and distorted picture. (part of circuit diagram displayed)
• At switch on the sound mutes. The effect lasts for only about ten minutes and will not return until the next day. (with circuit diagram extract)
• Distorted audio. on the left. (with circuit diagram extract)
• Q551 fails again after a short time.
• No synchronisation. (extract of circuit diagram attached)
• Picture pulls to right hand side. (extract of circuit diagram attached)
• Appliance hisses. No high voltage. Standby voltage is present. (part of circuit diagram displayed)
• No vertical synchronisation.
• Vertical distortion. Horizontal deflection with vertical stripes and pairing effect.
• No picture. No sound. Squeals. Channel numbers lit. (+ extract of circuit diagram)
• Picture turns red after a short while in operation.
• 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. (picture attached)
• Intermittent or no colour. (picture attached)
• Unstable OSG.
• Dead. (with circuit diagram extract)
• Power supply squeaks, speaker hums and twitters. (with circuit diagram extract)
• No start-up. LED blinks .
• No synchronisation. in TXT. (extract of circuit diagram attached) (TXC84 tip from OTTOVERSAND)
• No colour, or colour flashes on and off. (+ extract of circuit diagram) (service info for OTTOVERSAND -TXC84)
• Smearing in picture.
• Picture sync goes then picture disappears. (part of circuit diagram displayed)
• Power supply hissing for approx 3 secs at start up and goes to safety mode. Programme display visible all the time.
• Whistling in the power supply, depending on the load. (service info for OTTOVERSAND -TXC84)
• Faulty TXT. (picture attached)
• PSU pulsates.
• Picture width quivers.
• Switches to standby (after start-up). (picture attached)
• Snow on picture and low gain. (picture attached)
• Severe noises form PSU for approx. 5 sec, then switches off . Program display remains
• Picture goes red. (TXC84 tip from OTTOVERSAND)
• No picture. No sound. Raster OK. CRT-filament lights, blocked on channel 0.
• East to West bowing. (+ extract of circuit diagram)
• TV starts up, EHT starts up then cuts out. Channel display remains.
• Dark picture.
• Reduced horizontal size. intermittently. (part of circuit diagram displayed) (TXC84 tip from OTTOVERSAND)
• No raster. (+ extract of circuit diagram)
• Lines in picture. at top. (picture attached)
• Sound is slightly distorted. (with circuit diagram extract)
• No display. No functions. No audio, only a dark blank raster. (picture attached)
• Horizontal lines at the top part of the picture. OSD insertions slowly run vertically through the picture.
• Intermittently goes dead with loud whistling. (picture attached)
• Sound is distorted from either left or right hand channel. (with circuit diagram extract)
• Dark picture via S-VHS input. (TXC84 OTTOVERSAND repair tip)
• Line transistor BU508D fails again straight away immediately after switch on. (+ extract of circuit diagram)
• Power supply overloaded and squealing.
• Starts up, then no function from remote or main controls.
• No audio. No picture. Channel indicator OK.
• No brightness. Audio OK .
• Stuck in standby. (with circuit diagram extract)
• Intermittent whistle. (picture attached)
• Tuning problems, would drift off tune after some time. (picture attached) (TXC84 tip from OTTOVERSAND)
• No picture (intermittently). Audio OK . (picture attached)
• Powers up momentarily. (picture attached) (TXC84 tips)
• Set dead apart from a whine from the power supply. (+ extract of circuit diagram)
• Intermittently flickers and powers down. (with circuit diagram extract)
• Poor colour. (with circuit diagram extract)
• IC801 intermittently blown. (picture attached)
• Intermittent colour, sometimes flashes orange, green then blue then disappears altogether. (picture attached)
• No blue. after a while. (with circuit diagram extract)
• Sound and picture are missing, channel change ok. (picture attached) (TXC84 OTTOVERSAND repair tip)
• Blank raster. No RC functions. (part of circuit diagram displayed)
• No synchronisation via SCART and TV. (TXC84 OTTOVERSAND repair tip)
• Intermittent colour and insufficient colour at max setting of colour control. (part of circuit diagram displayed)
• Chirping. Line tearing. after a while.
• Intermittently dead. (with circuit diagram extract)
• Poor vertical line across right side of picture. (TXC84 OTTOVERSAND repair tip)
• PSU whistling. Channel indicator OK.
• Intermittently no line hold. (+ extract of circuit diagram)
• 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.
• Intermittent loss of tuning memory.
• Switches to protection mode (after start-up). (+ extract of circuit diagram)
• Intermittent black lines on right hand side of picture. (part of circuit diagram displayed)
• Line BU fails at irregular intervals.
• RC problems. (picture attached)
• Vertical stripes like strings of pearls in picture.
• Unstable picture. Hum in audio. Colour flickers.
• Appliance fizzes then width comes in. (with circuit diagram extract) (TXC84 OTTOVERSAND repair tip)
• Intermittent audio. (with circuit diagram extract)
• Buzzing from PSU.
• Intermittent whistling noise when set first switched on.
• Failure of line output transistor Q551 (2SD1441RL). (+ extract of circuit diagram)
• Starts up, line transformer starts up then cuts out. Channel display remains. (service info for OTTOVERSAND -TXC84)
• 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.
• Switches to protection mode (after a few seconds). (picture attached)
• Foldover at top and picture vibrates.
• No convergence.
• Occasionally picture and sound disappear. (+ extract of circuit diagram) (service info for OTTOVERSAND -TXC84)
• No sync on OSD or text. Usually no text at all, just moving blank screen. (with circuit diagram extract)
• Chirping. Display OK .
• No horizontal oscillation signal. Whistle from PSU often.
• EHT fails within 2 secs after switch on.
• Flashover voltage in PSU.
• Distorted audio from left hand channel.
• Extremely weak contrast, controls have no effect. (with circuit diagram extract)
• Appliance squeaks very loud. No picture. No sound.
• White flashes in picture and/or intermittent operation and/or horizontal sync dropout intermittently.
• No audio. No picture. (extract of circuit diagram attached)
• Ragged raster. Picture lines run through each other.
• Picture is shifted inwards at the right side. Fault occurs after approx 15 mins.
• Poor colour. intermittently. (with circuit diagram extract)
• Strong chirping after switch on. No channel appears.
• PSU whistles.
• Intermittently no or low audio and crackling from right speaker. Sound OK on SCART socket. (TXC84 tip from OTTOVERSAND)
• TXT flashes on screen after 1 hour. Loss of sync on TXT. (picture attached)
• Whistling at start-up. Programme number display functions.
• Doesn't switch completely off from standby. Program display disappears. Standby LED lights.
• Switches off by itself. after warm-up. (with circuit diagram extract) (service info for OTTOVERSAND -TXC84)
• Loss of sound.
• Colour varies. (extract of circuit diagram attached)
• LED briefly lit after switch on, then progr. 1 or 2 starts. No other entries possible. No picture and no sound.
• No or poor contrast. (picture attached)
• TV goes into safety mode at switch-on.
• Colour not right. (extract of circuit diagram attached)
• No luminance signal. Chroma is present.
• Dead. Whining. Channel numbers OK. (extract of circuit diagram attached)
• Poor synchronisation. (picture attached)
• Cannot be switched properly to standby, sound muted after pressing standby key on RC, programme display disappears and standby LED lit, picture still present.
• Fizzle noise after turning on.
• No start-up (intermittently). (+ extract of circuit diagram)
• Erratic colours. (part of circuit diagram displayed)
• No audio for 10 mins. (extract of circuit diagram attached)
• Muted audio. (with circuit diagram extract)
• Memory IC defective.
• No tuning.
• No STEREO sound.
• No picture, no high voltage, power supply squeaks, sound present. (extract of circuit diagram attached)
• Q551 running very hot and blowing R567 after approx. 4hrs. (extract of circuit diagram attached)
• No E/W correction.
• Bright lines on screen. (with circuit diagram extract)
• No light (Y signal) in reception via tuner nor via SCART input. TXT and OSD OK.
• Picture twists horizontally causing E/W distortion when warm.
• Defective or erratic oscillating colours.
• Blue screen only. No sound but channel indicator is working & will change channels when selected.
• Horizontal tearing.
• White bar (approx. 10cm) on top of the picture.
• Squealing from PSU (intermittently).
• Comes on then switches to standby leaving three blobs of colour in the centre of screen. (+ extract of circuit diagram)
• When appliance is warm tuning problems occur. (with circuit diagram extract)
• Dead after a burst of EHT.
• Raster is blank, video, sound and display are missing and no remote control response. (part of circuit diagram displayed)
• No colour (intermittently).
• Lines in picture.
• No text, channel flag drifting. (extract of circuit diagram attached)
• Switches off by itself. after a few minutes.
• Bad distortion, line doubling and horizontal striations were all present at once. (extract of circuit diagram attached)
• Line output transistor fails repeatedly. (with circuit diagram extract)
• Whistling from PSU. intermittently. (+ extract of circuit diagram)
• No picture or sound intermittently. Program display is present.
• E/W fault. (+ extract of circuit diagram)
• Horizontal green and magenta bars running through picture. (picture attached)
• Poor picture and colour halo at sides of screen.
• No voltages from PSU.
• Flyback lines. at top.
• 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)
• 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)
• Elusive Parts.
• No synchronisation. No picture. Shuts down. (+ extract of circuit diagram)
• No line drive. (extract of circuit diagram attached)
• Black screen.
• Fine lines on top of picture.
• Vertical collapse. (+ extract of circuit diagram)
• Faint line down right hand side of screen. (picture attached)
• No sound and picture. Channel switch over OK.
• Squeals at switch on then dies except for channel number indicator. (picture attached)
• No Nicam sound, neither Nicam nor mono symbol seen on display. (part of circuit diagram displayed) (service info for OTTOVERSAND -TXC84)
• Hum, crackling, and other secondary noises via headphones and loudspeaker with high volume and volume "0".
• Line BU is S/C.
• Intermittent colour and saturation is low. (+ extract of circuit diagram)
• Reduced vertical deflection.
• No picture (intermittently). (picture attached)
• No picture. Audio OK . (extract of circuit diagram attached)
• Red picture. Flyback lines.
• Horizontal dark bars across the picture. (part of circuit diagram displayed)
• Dead. Channel display on . (extract of circuit diagram attached)
• Picture and sound are missing, channel change ok.
• Tuning goes off with ticking. (part of circuit diagram displayed)
• Bright red raster.
• Tuning drifts (intermittently).
• Bright red screen.
• Defective or erratically oscilating colours.
• No vertical deflection. (part of circuit diagram displayed)
• Squealing from PSU. (extract of circuit diagram attached)
• Horizontal lines in top half of picture when cold. Entire picture trembles.
• Q552 (2SD1441) S/C. (extract of circuit diagram attached)
• Switches to standby.
• At switch on picture is snowy, flashes, then OK. (extract of circuit diagram attached)
• No HV.
• No sound for the first half an hour. (+ extract of circuit diagram)
• Loss of text sync/no channel identification lock. (extract of circuit diagram attached)
• After working for a couple of minutes, picture sync is lost then the screen goes black. Power supply shuts down and squeals. (with circuit diagram extract)
• Low audio from right hand side loud speaker. Crackling scart socket.
• After approx 1 hour the picture becomes approx 3cm too small at the right edge.
• How to check main PSU.
• 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)
• When warm picture shift to the right then line oscillation is defective.