EURO12 / MITSUBISHI [TV (Standard) (chassis)]

• NICAM comes in or goes out and sound becomes distorted.
• Switches to standby. Slow start-up. (part of circuit diagram displayed)
• No line drive. intermittently. (+ extract of circuit diagram)
• Bars, shadows and waves in PB, tuner picture OK.
• Crackling or NICAM dropout.
• Streaks in picture.
• Focus adjustment.
• Snow in picture. (extract of circuit diagram attached)
• Weak contrast. (extract of circuit diagram attached)
• Sound buzz in standby, LH speaker.
• No picture in the lower third.
• To improve the Y/C timing.
• Afterglow. after warm-up. (+ extract of circuit diagram)
• Red LED lights up, then green one, then both go out. (+ extract of circuit diagram)
• Sound buzz in standby, LH speaker. (picture attached)
• No picture.
• Frame output IC no longer available.
• To improve the Y/C timing.
• Modification kit to be used in the event of Q901 replacement.
• Sound buzz in standby, LH speaker. (extract of circuit diagram attached)
• No raster. No HV. (+ extract of circuit diagram)
• NICAM drops in/out. Sound becomes distorted.
• Dark picture. in TXT. (part of circuit diagram displayed)
• Contnuously colour(s) are missing. (part of circuit diagram displayed)
• No text, no sound. (extract of circuit diagram attached)
• Smearing in picture. No degaussing. (EURO12 MITSUBISHI repair tip)
• No colour.
• Grey scale error. (picture attached)
• Frame cramp at centre of screen. Long picture. Insufficient width.
• Red flares only when Thomson tube CT29" is fitted. (with circuit diagram extract)
• No vertical synchronisation.
• Red flares only when Thomson tube CT29" is fitted. (picture attached)
• Picture pumping vertically when changing from bright to dark scenes. Fault disappears when appliance is warm.
• No colour present in cold conditions. (extract of circuit diagram attached) (EURO12 tips)
• Dropout of all signals (both picture and sound signals). (EURO12 tips)
• Loss of signals after some period.
• No luminance. intermittently. (picture attached)
• Hum from one speaker in standby only. (part of circuit diagram displayed)
• Red flares only when Thomson tube CT29" is fitted. (part of circuit diagram displayed)
• Whine on Nicam reception only.
• Severe humm sound via speaker in first half hour, also via AV and via HF operation.
• PSU repeatedly blown.
• Vertical foldover. (with circuit diagram extract)
• Appliance is dead, for a while LEDs light up.
• Sound buzz in standby, LH speaker. (with circuit diagram extract)
• Enter service mode.
• Noisy T901 in standby. (+ extract of circuit diagram)
• Grey scale error. (+ extract of circuit diagram) (EURO12 tips)
• PSU is in overload trip mode. (extract of circuit diagram attached) (EURO12 MITSUBISHI repair tip)
• Spare part info: HF tuner.
• Loses brightness once every two weeks.
• No TXT. (picture attached)
• At switch on a burst of EHT then switches off. (EURO12 tip from MITSUBISHI)
• Horizontal disturbances, moving stripes on the picture.
• Half a picture.
• Grey scale error. (+ extract of circuit diagram)
• Dead. after start-up. Squealing noise.
• Moire pattern.
• Reduced sync width and linearity fault towards the top. High intensity in the central part. Occasionally correct start up raster.
• Grey scale variations.
• No audio. (part of circuit diagram displayed)
• Green line down left hand side of screen. (picture attached)
• Grey scale error. (extract of circuit diagram attached)
• HT rises momentarily.
• Intermittently blows Q552.
• Linearity and geometry are continuously not perfect. (with circuit diagram extract)
• Frame linearity, stretched at top and compressed at bottom.
• 1kHz whistle on sound.
• Low HV. (picture attached)
• No signal. after a few minutes.
• After warming up no picture and no sound, only current.
• Modification of vertical output stage when using TDA817 instead of TDA8178/S.
• PSU voltage too high for line output stage.
• Intermittently NICAM crackles usually when warm, tuning drifts and teletext becomes corrupted.
• Intermittently no Y signal.
• Excessive horizontal size.
• No text, no sound.
• No tuning.
• Bright raster.
• Intermittent crackling audio. Worse on NICAM.
• No audio. (part of circuit diagram displayed)
• Frame output IC fails when set switched on from standby. (EURO12 tip from MITSUBISHI)
• No signal. after a while.
• Picture has shifted approx. 12cm to the top. Linearity starts from the bottom with a narrow grid which becomes increasinly wider and cannot be adjusted via V-POS in the service menu.
• Green line down left hand side of screen. (+ extract of circuit diagram)
• Frame output IC (TDA8178S) failed. (part of circuit diagram displayed) (EURO12 tip from MITSUBISHI)
• Slow start-up.
• 1kHz whistle on sound.
• Continuously colour(s) are missing.
• HT settings at TP91.
• Pincushion distortion. at top and bottom.
• To improve dynamic regulation.
• Vertical line.
• Continuous streaking/smearing visible in the picture. (+ extract of circuit diagram)
• Frame output IC no longer available.
• Poor colour. (with circuit diagram extract)
• No audio (intermittently).
• Keeps blowing switch mode transistor SD1887.
• No audio (intermittently).
• Continuously no current when connecting to the mains.
• After few mins, rows of vertical dots 3ins apart, then picture may go blank. (extract of circuit diagram attached)
• Distorted NICAM affecting one or more channels.
• Grey scale variations.
• Screen display is occasionally defective. (with circuit diagram extract)
• To improve dynamic regulation.
• Excessive width when switching on in cold conditions. After approx 1 min, error corrects by itself.
• Green line down left hand side of screen. (part of circuit diagram displayed)
• Green line down left hand side of screen. (part of circuit diagram displayed)
• Poor Stereo and Multi Sound functions.
• No picture. intermittently. (part of circuit diagram displayed)
• No audio.
• Continuously no complete picture present. (picture attached)
• Loss of signals after some period.
• Red flares only when Thomson tube CT29" is fitted. (with circuit diagram extract) (MITSUBISHI - EURO12 information)
• HT settings at TP91.
• Continuously no sound present.
• Option codes. (EURO12 MITSUBISHI repair tip)
• Display position adjustment - micro computer circuit.
• Distorted NICAM affecting one or more channels.
• Distorted NICAM affecting one or more channels. (EURO12 MITSUBISHI repair tip)
• Grey scale variations.
• Hum bar apparent in chroma content of picture.
• Replacement for TDA8178S.
• Does not power up, occasionally trips. Red and green lights both on.
• Continuous defective functions of the memory. (with circuit diagram extract)
• Poor focus.
• Colour output adjustment. (part of circuit diagram displayed)
• Switching off into standby at bright scenes. (extract of circuit diagram attached)
• Occasionally sound is distorted.
• White balance is continuously defective.
• Occasionally the sound is too loud/low.
• 1kHz whistle on sound.
• Frame output IC no longer available.
• To improve dynamic regulation.
• Intermittent audio.
• 1kHz whistle on sound.
• Appliance switches on for a short while, and then switches off again. Relay switches on but picture doesn't appear. (EURO12 MITSUBISHI repair tip)
• Failure of line output transistor Q552.
• Vertical IC fails again after several weeks.
• Insufficient height, OK after approx 2 minutes.
• Continuously no raster present.
• Clear picture takes approx 1 min to come on, though just visible in background. When channel changed process is repeated, but also with low brightness. (with circuit diagram extract)
• Frame output IC no longer available. (MITSUBISHI - EURO12 information)
• Reduced vertical and horizontal size. when cold. (picture attached)
• White adjustment is continuously defective. (picture attached)
• PAL horizontal centre adjustment..
• Distorted audio. intermittently.
• Buzz from loud speakers when standby selected. (with circuit diagram extract)
• Red flares only when Thomson tube CT29" is fitted. (extract of circuit diagram attached)
• No signal.
• Green line down left hand side of screen. (+ extract of circuit diagram)
• Replacement for TDA8178S.
• Poor power supply operation.
• Random dot pattern, no OSG, grey scale problems. (extract of circuit diagram attached) (service info for MITSUBISHI -EURO12)
• NICAM beacon on screen intermittently, and/or audio buzz/ hiss.
• Line output transistor D1878 keeps failing. (picture attached)
• Distorted NICAM affecting one or more channels.
• To improve the Y/C timing.
• Degauss operates intermittently at random. (+ extract of circuit diagram)
• To improve dynamic regulation.
• Loss of signals after some period.
• Blank raster. No OSD.
• Excessive width, bowed verticals, picture shifted to one side, no on-screen menus. (picture attached)
• Red bleeding on white backgrounds. (+ extract of circuit diagram)
• To improve the Y/C timing.
• Automatic white balance is continuously defective. (picture attached)
• Distorted NICAM affecting one or more channels. (EURO12 tip from MITSUBISHI)
• Replacement for TDA8178S.
• Distorted NICAM affecting one or more channels.
• With certain standards defective functions in the memory. (picture attached)
• Vertical collapse (intermittently).
• No audio playback from mono VCR or sat Rx.
• Poor picture. Distorted picture. OK via SCART .
• Frame output IC no longer available.
• Frame output IC no longer available. (EURO12 MITSUBISHI repair tip)
• Continuously no picture and no sound, only current. (+ extract of circuit diagram) (MITSUBISHI - EURO12 information)
• Resistor R901 (4.7nF/10W) and diode D908 (3.0V) fails.
• Colour sub-carrier off speed. (+ extract of circuit diagram)
• After warming up no picture and no sound, only current.
• Distorted picture. Knock sensitive. (EURO12 tips)
• Trips (intermittently). (picture attached)
• B4 voltage adjustment. (EURO12 tips)
• TDA8178 fails. (service info for MITSUBISHI -EURO12)
• Loss of signals after some period.
• Grey scale error. (extract of circuit diagram attached)
• Dead. (picture attached) (EURO12 tips)
• HT settings at TP91.
• To improve the Y/C timing. (with circuit diagram extract)
• HT settings at TP91.
• No menu on screen except in text mode. (picture attached)
• No OSD.
• Intermittent loss of sound and occasionally loss of picture.
• Loss of signals after some period. (MITSUBISHI - EURO12 information)
• 2SD1887 in the HV part is defective.
• PAL height and linearity adjustment.
• Red flares only when Thomson tube CT29" is fitted. (+ extract of circuit diagram)
• Intermittent wavy dot pattern superimposed on the picture. TXT OK.
• To improve the Y/C timing.
• No sound - no TXT. (with circuit diagram extract)
• To improve dynamic regulation.
• Grey scale error. (with circuit diagram extract)
• Sound buzz in standby, LH speaker. (part of circuit diagram displayed)
• Buzz in audio. via speakers (on the left).
• Pincushion distortion. on sides. Excessive horizontal size. (picture attached)
• Continuously no sound present. (extract of circuit diagram attached) (MITSUBISHI - EURO12 information)
• Reduced horizontal size. (EURO12 MITSUBISHI repair tip)
• N/S fault, picture is pinched at the bottom and top, cannot be adjusted.
• Continuously missing colour(s). (with circuit diagram extract)
• Continuous beats/oscillations visible in the picture. (with circuit diagram extract)
• No reception possible from the cable channels.
• No TXT. No audio.
• The linearity/geometry is continually not perfect.
• Black/white picture. No or poor sound.
• Loss of signals after some period.
• LOPTR S/C. (MITSUBISHI - EURO12 information)
• Afterglow. (extract of circuit diagram attached)
• No picture (after a while). (part of circuit diagram displayed)
• Unstable HT.
• To improve dynamic regulation. (+ extract of circuit diagram)
• At the top part of the picture, bright horizontal stripes visible. No OSD display. Horizontal spikes run over the whole screen. (extract of circuit diagram attached)
• TXT free-running frequency adjustment.
• No picture. No audio. (picture attached)
• Grey scale incorrect. Picture blue. (picture attached)
• When switching on, black frame on picture. Intermittently it has graphic symbols or is empty. Occasionally, erratic or intermittent TXT.
• Brightness varies. (picture attached)
• No text, no sound, no Nicam, picture geometry errors. (extract of circuit diagram attached)
• HT varies. (part of circuit diagram displayed)
• Dark picture. (with circuit diagram extract)
• Frame linearity problem. (extract of circuit diagram attached)
• 1kHz whistle on sound.
• No picture. after warm-up. Raster OK .
• No audio (intermittently).
• Picture blanks out into a small square.
• Poor audio (when cold).
• Chirps three times then powers down. (MITSUBISHI - EURO12 information)
• Poor IF operation.
• After warming up only the raster is visible, picture content is missing.
• Grey scale variations. (EURO12 tips)
• HT increases and causes Q552 (line output transistor) to fail. (part of circuit diagram displayed)
• Stereo- and multi-sound functions are continuously O/C. (+ extract of circuit diagram) (EURO12 tips)
• Low contrast. Flyback lines.
• HT settings at TP91.
• Strong buzzing via loudspeaker for approx. 30 mins after start-up, either via AV and RF.
• Loss of signals after some period.
• Vertical collapse. (extract of circuit diagram attached)
• Loss of signals after some period.
• After warming up no picture and no sound, only current.
• No audio (intermittently).
• After warming up picture blooming, no limiter.
• Continuously no sound present.
• Goes dead 5 secs after switch on. Stays on if on/off switch continually pressed. (+ extract of circuit diagram) (EURO12 tips)
• Faulty TXT. No TXT. intermittently.
• Sound buzz in standby, LH speaker. (+ extract of circuit diagram)
• Grey scale error. (part of circuit diagram displayed)
• Distorted NICAM affecting one or more channels.
• Field output.
• Distorted NICAM affecting one or more channels. (MITSUBISHI - EURO12 information)
• Whistling during NICAM transmissions.
• Incorrect grey scale.
• HT settings at TP91.
• Lines in picture. Whistling. (EURO12 MITSUBISHI repair tip)
• Behaves like if it's out of norm on some channels.
• Sound buzz in standby, LH speaker. (part of circuit diagram displayed)
• After warming up no picture and no sound, only current. (MITSUBISHI - EURO12 information)
• Sometimes appliance starts up, switches off again after 3-5 secs. Then picture is still not bright. Horizontal deflection is a bit too large, vertical deflection is somewhat unstable.
• Intermittently does not start up. When it starts, then picture width and height are unstable. (EURO12 tips)
• With certain standards defective functions in the memory.
• Occasionally no picture and no sound, only current. (picture attached)
• Wavy dot pattern superimposed on picture, sometimes the picture blanks out completely, teletext ok.
• Frame output IC no longer available.
• Green line down left hand side of screen. (+ extract of circuit diagram)
• Green line down left hand side of screen. (part of circuit diagram displayed)
• Red flares only when Thomson tube CT29" is fitted. (with circuit diagram extract)
• No text, no sound. (part of circuit diagram displayed)
• No channel lock. Previously saved channels are OK.
• Flickering picture. intermittently. (extract of circuit diagram attached)
• No audio (intermittently). (EURO12 MITSUBISHI repair tip)
• Frame output IC no longer available.
• No North/South correction
• Dead. Goes off with bang. (MITSUBISHI - EURO12 information)
• PSU fails in range Q901, R901 and D908. (with circuit diagram extract)
• No text. No NICAM. Extremely wide picture.
• No functions. (extract of circuit diagram attached)
• Red flares only when Thomson tube CT29" is fitted. (extract of circuit diagram attached)
• No text, no sound.
• Grey scale variations.
• To improve the Y/C timing.
• All voltages die after approx 10 secs. (MITSUBISHI - EURO12 information)
• Several white lines in the top part of the picture, a few coloured lines at the bottom from the right to the middle of the picture.
• PAL vertical centre position adjustment.
• Only functions in PAL - no longer goes to SECAM. The correct system is displayed on the screen. (with circuit diagram extract)
• Green line down left hand side of screen. (with circuit diagram extract)
• To improve dynamic regulation.
• Tripping. after start-up. (+ extract of circuit diagram)
• To improve dynamic regulation.
• Grey scale error. (+ extract of circuit diagram)
• No vertical deflection.
• Colour fault. White screen. intermittently. (service info for MITSUBISHI -EURO12)
• No power (no picture, no sound). Continuously present. (part of circuit diagram displayed)
• White adjustment.
• Coloured spots when switching on. Hum in standby.
• No text, no sound. (+ extract of circuit diagram)
• Intermittently dead. (part of circuit diagram displayed)
• 1kHz whistle on sound.
• No functions.
• Vertical deflection is defective.
• To improve the Y/C timing.
• HT settings at TP91.
• 1kHz whistle on sound.
• Grey scale error. (part of circuit diagram displayed)
• Failure of vertical output IC451.
• The colour is missing in cold condition. (part of circuit diagram displayed)
• No stations received. Tuning works OK. Scart operation OK.
• No TXT. Black screen.
• Line tearing in the lower third of the picture.
• Relay clicks two times, then switches off. Standby LEDs go out.
• No start-up. (with circuit diagram extract)
• Call up and adjustment of service mode.
• Continuously no current when connecting to the mains. (with circuit diagram extract)
• To improve dynamic regulation. (EURO12 MITSUBISHI repair tip)
• Slow start up for a period of days, then dies.
• The colour is missing continually. (extract of circuit diagram attached) (EURO12 tips)
• Grey scale variations.
• Distorted NICAM affecting one or more channels.
• No text, no sound. (extract of circuit diagram attached)
• HT value.
• NICAM crackling when warm and drifts off tune.
• Does not tune VCR if VCR is connected to aerial socket.
• Continuously missing colour(s). (with circuit diagram extract)
• Trips (after a few seconds). (with circuit diagram extract) (EURO12 tips)
• Faulty luminance response with picture blanking intermittently. TXT OK.
• Vertical roll.
• No picture. Raster OK . (with circuit diagram extract)
• No sound, TXT or NICAM. (with circuit diagram extract)
• AV on screen (when using scart) should go after a few seconds once AV signal detected. (+ extract of circuit diagram)
• Frame output IC no longer available. (extract of circuit diagram attached)
• Vertical foldover. Reduced vertical size. (picture attached)
• Vertical collapse. Audio OK . (MITSUBISHI - EURO12 information)
• No sound via RF and Scart.
• Continuously only raster still visible, picture contents missing.
• Pulsates once or several times and then switches off.
• HT settings at TP91.
• Red flares only when Thomson tube CT29" is fitted. (part of circuit diagram displayed) (EURO12 tips)
• Height and linearity problems.
• One colour missing.
• Continually no sound. (with circuit diagram extract)
• Excessive HV.
• 1kHz whistle on sound.
• U1 is too high.
• Continuously no picture and no sound, only power. (part of circuit diagram displayed) (service info for MITSUBISHI -EURO12)
• No tuning via RC.
• Continuously no picture and no sound, only current.
• Occasionally weak reception level. (+ extract of circuit diagram)
• Transistor Q901 is S/C.
• Shuts down. (service info for MITSUBISHI -EURO12)
• Green line down left hand side of screen. (+ extract of circuit diagram)
• Trips. (picture attached)
• Sound buzz in standby, LH speaker. (part of circuit diagram displayed)
• No horizontal deflection.
• Dark raster. Bright line in the centre.
• If Q901 fails. (+ extract of circuit diagram)
• Black screen or low luminance.
• Takes a long time to come on, slow warm up.
• 1kHz whistle on sound.
• Sound buzz in standby, LH speaker. (extract of circuit diagram attached)
• Grey scale variations.
• Picture appears slowly. (with circuit diagram extract)
• Buzz in audio. on the left.
• Grey scale variations.
• To improve the Y/C timing.
• Grey scale variations.
• Noise in the PSU in standby.
• Vertical IC fails repeatedly.
• Standby.
• No luminance. (part of circuit diagram displayed)
• Screen display is continuously defective.
• HT settings at TP91. (service info for MITSUBISHI -EURO12)
• Modification kit to be used in the event of Q901 replacement.
• No picture, only snow. after a few minutes.
• Switches to standby (intermittently). (with circuit diagram extract)
• HV 145V.