20GR105068R / PHILIPS [TV]

• After operating for one hour it is no longer possible to switch over programmes not even from the front panel. Appliance must be switched on and off then it is possible to change channels.
• Sound varies with picture content.
• Initial volume level is higher than maximum Hotel mode setting.
• Skips channels during tuning. (part of circuit diagram displayed)
• Intermittent colour. (service info for PHILIPS -20GR105068R)
• Memory loss. (picture attached)
• Dead when switched on via mains switch. Though appliance is on, red LED flashes. Can be switched over to standby. If left in standby for 1 hour and then switched on via RC, functions.
• No start-up. (picture attached) (20GR105068R tip from PHILIPS)
• Focus adjustment.
• To put into hotel mode.
• Comes on in standby. When program button pressed standby lamp blinks then goes off.
• Wavy picture. on the right.
• Squealing from PSU.
• No tuning. No channel lock. (+ extract of circuit diagram)
• Right side of picture discoloured.
• No voltage from PSU. (picture attached) (service info for PHILIPS -20GR105068R)
• Sound varies with picture content.
• "Store" key does not work. (extract of circuit diagram attached)
• Whistling from PSU. (picture attached)
• No or intermittent start-up. (extract of circuit diagram attached)
• PSU peeps +95 is ca 0,8v
• Search jumps on UHF.
• No start up, just a buzzing noise in speakers. (+ extract of circuit diagram)
• Initial volume level is higher than maximum Hotel mode setting.
• Slow hiccup (picture attached)
• No picture. TXT OK . (extract of circuit diagram attached)
• No function. Standby-LED lights up. Appliance switches on but no picture or sound.
• No sound or raster. The 95V HT supply is present at the line output stage but there is no line drive. (extract of circuit diagram attached)
• Stops working every 2 or 3 hrs. Only starts again after switching off and on again.
• Green picture. after warm-up. Lines in picture. after warm-up. Does not change channels. (20GR105068R PHILIPS repair tip)
• Connection of a loop system to the TV.
• No start-up. when cold. (extract of circuit diagram attached)
• +9V supply modification. (extract of circuit diagram attached)
• Line transistor 7528 blows within 1 sec. (picture attached)
• CRT types.
• Only half a picture. (picture attached)
• No tuning bar when install button pressed and set not in hotel mode. (+ extract of circuit diagram)
• Green screen with flyback line. No picture. OSD OK.
• Settings do not stay in position.
• How to reset microprocessor.
• Low audio.
• Initial volume level is higher than maximum hotel mode setting.
• No functions. when cold.
• Error messages indicated by front display flashing. (+ extract of circuit diagram)
• Green screen with flyback lines. Green oscillations. Noise as if HV leaky on picture tube base. (extract of circuit diagram attached)
• Horizontal hold adjustment procedure.
• Line tearing, especially with bright scences. (picture attached)
• No colour.
• The remote control only controls the volume and sound-stop. No function with On-Off and channel change-over, although the display for the operation flickers.
• SOPS defective. (with circuit diagram extract)
• Green picture with retrace lines. After a few restarts picture OK.
• Intermittent colour and intermittent dark vertical bar on picture.
• Buzzing.
• No line output stage. (with circuit diagram extract)
• Slow start-up.
• Reluctant to start up from cold. (20GR105068R tip from PHILIPS)
• No start-up. intermittently. (20GR105068R tip from PHILIPS)
• Green raster. Faint picture. Flyback lines.
• No picture (when cold).
• Set goes accidentally into hotel mode. (PHILIPS - 20GR105068R information)
• Picture displays lines and strange foldover effect at centre.
• No tuning. (with circuit diagram extract) (20GR105068R tips)
• Intermittently narrow picture, but corrects itself shortly after.
• No channel search. No OSD. (picture attached)
• Dim picture with Hanover bars. (20GR105068R tips)
• Difficult to tune programmes, stations shifted on tuning bar.
• New IR receiver.
• Crackling and popping in sound after a short time. (PHILIPS - 20GR105068R information)
• No +9V, line output stage is OK. (extract of circuit diagram attached)
• The TV cannot hold the picture.
• Occasionally appliance does not switch on from standby. No further functions are possible.
• Right hand side of screen has a line.
• Adjustment of +95V. (+ extract of circuit diagram)
• Intermittent colour. (PHILIPS - 20GR105068R information)
• No OSD. Picture OK .
• No sound. Picture OK. After a short time TV stops. High frequency noise from PSU. (+ extract of circuit diagram)
• Picture centering has shifted horizontally. No OSD.
• No tuning. Impossible to change analog control adjustments (brightness, sound, etc.). (picture attached)
• Set won't tune to high frequency channels and lower frequency channels appear to be higher. (part of circuit diagram displayed)
• No audio.
• The fuse and the bridge diodes in the power supply blow.
• Picture is mostly green with flyback lines after 10 secs from switch on.
• Processor numbers (changed).
• Volume varies. depending on picture content. (+ extract of circuit diagram)
• Picture fails for a short time. (with circuit diagram extract)
• How to enter/exit HOTEL mode.
• Quick hiccup. (extract of circuit diagram attached)
• Bright picture. Flyback lines.
• Picture shifted to the left. intermittently. Line tearing. intermittently. (with circuit diagram extract)
• Description of SMPS. (picture attached)
• Horizontal white line.
• Display goes to F1 a few seconds after switching the set on.
• To release hotel mode (child lock).
• Smeary, washed out picture with bent verticals. (+ extract of circuit diagram)
• Change of C2523.
• No voltage from PSU, computer does not work. (picture attached) (PHILIPS - 20GR105068R information)
• Green screen and at other times no tuning. (picture attached)
• Rolling or jittering picture. (+ extract of circuit diagram) (service info for PHILIPS -20GR105068R)
• No function, starts up from standby, then goes out. (service info for PHILIPS -20GR105068R)
• How to switch off Hotel-Mode:
• Vertical collapse. (with circuit diagram extract)
• Vertical roll. (+ extract of circuit diagram)
• Picture passes out in the centre.
• Identification coil adjustment.
• Low 5V to micro chip. (part of circuit diagram displayed)
• Excessive vertical size.
• Microprocessor screening plate. (extract of circuit diagram attached)
• After working normally for a while the TV blocks in any position. The functions do not work.
• White balance adjustment. (20GR105068R tips)
• How to switch off Hotel-Mode.
• Dead. Power LED is OFF (ON in standby). Hissing from PSU.
• Control panel cover.
• Set does not retune or program etc
• Difficultly in tuning to correct position. (service info for PHILIPS -20GR105068R)
• No colour and vertical black bar across screen.
• Sound motorboating when cold. (with circuit diagram extract)
• No colour.
• Becomes defective immediately after switch on.
• Spurious nonsense OSG. Goes to standby after 0.5-2hrs. Loss of tuning. (service info for PHILIPS -20GR105068R)
• No functions. after start-up (intermittently).
• Using a lamp as a load.
• Standby just pulsing.
• Intermittent destruction of line o/p transistor. (+ extract of circuit diagram)
• Search jumps on UHF.
• Random breakdown of line output transistor. (with circuit diagram extract)
• No SOP supply. (extract of circuit diagram attached)
• No functions. Hum in loudspeaker. No LED lit.
• No function. Motorboating from PSU. TV starts up randomly. Intermittent fault. (PHILIPS - 20GR105068R information)
• Tuning drifts. only on certain channels.
• Dead. Low hum.
• Won't tune a new channel. Won't activate store function. Picture OK. Sound OK.
• Whistling.
• Control micro processors.
• No audio. (20GR105068R tips)
• Dead. At switch on the stand by LED flashes.
• Picture is faint with hanover bars. (extract of circuit diagram attached) (PHILIPS - 20GR105068R information)
• Poor sync. AGC fault.
• No picture, sound ok but on turning up A1 control, frame collapse. (picture attached)
• No tuning or on screen tuning display.
• Appliance does not function with standby light flashing. (20GR105068R tips)
• PSU does not start up, if appliance was switched off for a day. Appliance functions after short switch on/off. (+ extract of circuit diagram) (20GR105068R PHILIPS repair tip)
• No colour in OSD.
• Bell filter adjustment procedure.
• No start-up. Standby LED flashes .
• Memory content dropout at positions 4 and 5.
• No horizontal synchronisation. (+ extract of circuit diagram)
• Does not start up. Light buzz from loudspeaker. Standby LED produces one brief blink.
• Does not shut down (when cold).
• No line output.
• Vertical vibration in cold condition of set.
• PSU check. (service info for PHILIPS -20GR105068R)
• Two lines going around. (picture attached)
• U743 tuner replacement. (part of circuit diagram displayed)
• Buzz in audio. No picture. (20GR105068R PHILIPS repair tip)
• Colour sync adjustment procedure.
• No tuning - no channels.
• Does not start. Slight buzzing in loudspeaker.
• Volume can't be tuned down. No tuning with RC. (with circuit diagram extract)
• Error codes.
• Power supply fault finding. (picture attached)
• Enter service mode.
• Cannot be programmed and search does not function. Only limited volume adjustable.
• Picture appears slowly.
• Tuning drifts. only on certain channels (after a while).
• Very slight vertical foldover with interferences similar to EHT arcing, especially on very white scenes.
• Store lock on the appliance.
• 10V on 95V line. (picture attached) (service info for PHILIPS -20GR105068R)
• Trips. (picture attached)
• Unstable tuning.
• Defective IC7103 SV-production. (with circuit diagram extract)
• Noise in audio.
• Does not start up at once from cold.
• After replacement of the line output transistor BUT12, picture with trapezoid effect, BUT12 overheats and goes defective again. (part of circuit diagram displayed) (20GR105068R PHILIPS repair tip)
• No picture and sound. Low hum intermittently, no function.
• 6613 type change. (+ extract of circuit diagram)
• Intermittent audio and picture. (part of circuit diagram displayed)
• Line output transistor replacement.
• Local controls inoperative.
• No tuning possible, F2 appears on bottom of picture and S1 on top.
• No start-up. Buzzing from speakers and working noise of PSU.
• Volume goes to max. No volume control.
• Stations won't change. Picture and sound OK. Other functions OK.
• After switching on the CTV "EXT...1.2.3..." appears on the screen.
• Unstable tuning.
• Green picture.
• Programs and PP-settings cannot be changed. (PHILIPS - 20GR105068R information)
• Programme tuning difficulty, stations shifted on tuning bar. (extract of circuit diagram attached)
• Line out of phase. Black band in centre of screen. No colour. (20GR105068R tip from PHILIPS)
• Picture is poor with rippling on verticals. (picture attached)
• No picture. No audio. (+ extract of circuit diagram)
• No power with abnormal sound. (+ extract of circuit diagram)
• 95V available. 9V is only 5.2V. Slight buzzing from loudspeakers. (service info for PHILIPS -20GR105068R)
• No audio.
• Excessive HV. after a while. (service info for PHILIPS -20GR105068R)
• No frame or short frame. (+ extract of circuit diagram)
• Humming, motor noise and other unusual noises. Normal picture.
• No tuning.
• Change of C2523.
• No picture or sound but RCU works correctly. LED flashes when the handset is tried. (extract of circuit diagram attached)
• Intermittently dead. after start-up.
• Colours flicker and disappears.
• Dead with whistling noise coming from power supply. (part of circuit diagram displayed)
• No operation.
• Secondary main power supply OK except +9V at 5.8V
• Line down middle of screen. (picture attached)
• Programme channel search cannot be called up.
• Tuning drifts. (+ extract of circuit diagram)
• Production change to line drive. (picture attached)
• Hotel mode.
• No sound or picture. Low hum from speaker. (picture attached)
• No output from the chopper power supply which uses a junction FET, whose gate and source are at 12V while 300V is present at the drain. (extract of circuit diagram attached)
• Line output stage does not function.
• Blank raster. OSD OK .
• Will not tune, drifts, colour disappears or interference on a certain channel. (e.g. channel 5 and 59) (PHILIPS - 20GR105068R information)
• Change of C2523.
• Field foldover at switch on from cold. Effect disappears when appliance warms up. (with circuit diagram extract)
• How to de-activate Hotel-Mode:
• Picture shifts. (with circuit diagram extract)
• Dim picture with Hanover bars visible. (part of circuit diagram displayed)
• Buzzing sound then switches off.
• Colour disappears with VCR-scan (picture search). (with circuit diagram extract)
• Power supply does not oscillate. (picture attached)
• Modification introduced to +9V supply.
• No functions. Standby LED flashes. Relay switches to ON.
• Picture separating line appears. Whistling.
• Delay RF AGC adjustment procedure. (20GR105068R tips)
• Tuning procedure.
• Dead. (picture attached)
• Blank or green raster. Flyback lines. Faint picture or normal picture. (part of circuit diagram displayed)
• Intermittently dead. (part of circuit diagram displayed)
• Blank raster. Flyback lines. (+ extract of circuit diagram)
• No switch on. Low noise on sound. (part of circuit diagram displayed) (20GR105068R tip from PHILIPS)
• Dead. Strange noises from PSU/ line output transformer. (with circuit diagram extract) (20GR105068R PHILIPS repair tip)
• No functions, hum in loudspeakers. (extract of circuit diagram attached)
• Enable Hotel mode. Disable hotel mode.
• Poor sound, cannot be adjusted louder. When adjusting, sound cuts out. (extract of circuit diagram attached)
• No HV.
• Height excessive. Defective linearity. Field blanking. (part of circuit diagram displayed)
• Colours flickers and disappears.
• Comes on for a short time.
• Red picture. Flyback lines.
• No freeze frame or intermittent freeze frame; no sound. (extract of circuit diagram attached)
• No function. Standby LED flashes briefly. (extract of circuit diagram attached)
• Green picture. (+ extract of circuit diagram)
• Does not stop on stations.
• Bright flash on screen. No picture or sound. (part of circuit diagram displayed)
• When switching on, only a 10cm stripe on top of screen, the rest of screen is black with flyback lines. After a while, stripe becomes wider. (picture attached) (20GR105068R tip from PHILIPS)
• No switch on. Weak whistling noise from PSU. LED is OFF. (20GR105068R tip from PHILIPS)
• Line tearing and rope effect. (20GR105068R tips)
• Colour flickers. No colour. after a while. (with circuit diagram extract)
• Picture only in two bars in upper screen section, the rest is dark. (+ extract of circuit diagram)
• Frame has shifted sideways. Appliance whistles and does not oscillate correctly. (part of circuit diagram displayed) (20GR105068R tips)
• Standby LED lights up and switches off at power on. Appliance will not start up.
• New infra red receiver.
• Limited volume. No channel search.
• Set dead with just 5V on the 95V line. Standby LED is on but set won't start. (part of circuit diagram displayed)
• Replacement of TDA7052 with a TDA7052A. (20GR105068R PHILIPS repair tip)
• Turns on automatically. No RC or front panel controls.
• Lines across top of picture about 8" in first 100 lines. (picture attached)
• Line output transistor fails repeatedly. (part of circuit diagram displayed)
• Dead. Low level buzz from loudspeaker. (part of circuit diagram displayed) (PHILIPS - 20GR105068R information)
• Switches to standby. (with circuit diagram extract)
• Picture shifted to the right. (with circuit diagram extract)
• Correction to service manual LOT winding.
• PSU switches off with load at U95V. (part of circuit diagram displayed) (20GR105068R tip from PHILIPS)
• No regulation. (picture attached)
• Blown chopper. (picture attached)
• Initial volume level is higher than maximum Hotel mode setting.
• No start up from cold and humming.
• No picture. OSD OK .
• Poor synchronisation. (part of circuit diagram displayed)
• Dead. Only hum from speakers. (picture attached)
• Line output stage TS7528 is defective. (extract of circuit diagram attached)
• Does not regulate +95V.
• The switched-mode power supply cannot be loaded. (service info for PHILIPS -20GR105068R)
• Enable Hotel mode. (20GR105068R tip from PHILIPS)
• Replacement of surface mounted diode 6637. (extract of circuit diagram attached)
• Volume change with great fluctuations in brightness. (part of circuit diagram displayed)
• Sound varies with picture content.
• Dead. Only standby-LED works. Responds to TURN ON command, but no image and no sound.
• Stored channels drift off tune briefly after switch on. Crackle in sound.
• Intermittently no picture and sound at switch on. Buzz from speaker. (part of circuit diagram displayed)
• Programming unoperational. Limited sound adjustment possible. (20GR105068R tips)
• Search jumps on UHF.
• Vertical amplitude cannot be fully adjusted, TXT lines can be seen. (extract of circuit diagram attached)
• Loosing colour during play-back of a video tape. (+ extract of circuit diagram)
• Stuck in hotel mode.
• Dead due to action of over voltage protection circuit.
• Appliance is dead with standby LED flashing after a few seconds. (part of circuit diagram displayed)
• Excessive horizontal size.
• To remove store/lock.
• Only some programs with snowy picture can be tuned and on band 1 missing some programs. (part of circuit diagram displayed)
• Low audio. (picture attached) (20GR105068R tip from PHILIPS)
• Blue picture. Coloured lines.
• Poor synchronisation. when cold. (extract of circuit diagram attached)
• Line output transistor running hot. (part of circuit diagram displayed)
• Fizzling sound from speakers at start-up and intermittently picture jagged.
• Microcomputers and screening plate.
• Failures in the power supply. (extract of circuit diagram attached)
• Service manual correction. (part of circuit diagram displayed)
• The tone (sound) tunes well, but the volume cannot be raised.
• No picture. No sound. Purring sound in loudspeaker. (part of circuit diagram displayed)
• Doesn't store stations correctly.
• Dead, very slight whistle from PSU.
• Lines on picture after approx one hour. It consists of a band of bright white lines about two inches wide. (+ extract of circuit diagram)
• LED does not flash. Slight buzz in appliance. (picture attached)
• Excessive brightness.
• No audio.
• Drive for high voltage missing. (+ extract of circuit diagram)
• Noise in sound. Mute does not function.
• No start up. No standby. Attempts to start up, but fails.
• No picture. Audio OK .
• How to switch OFF Hotel-Mode.
• Reluctant to start from cold (with circuit diagram extract)
• No sound. No picture. Faint motorboating noise.
• Appliance can not be programmed. Search does not function. Only limited volume control.
• Green picture.
• Bright flash on screen and no picture or sound after a few minutes. (part of circuit diagram displayed)
• Dead. Low frequency noise on sound.
• Vertical size varies. intermittently.
• Reduced horizontal size. (extract of circuit diagram attached)
• Searches for channels continuously. (part of circuit diagram displayed)
• High voltage transistor defective after a while.
• Memory cannot be opened via "rhombus". Stored channels cannot be changed. (service info for PHILIPS -20GR105068R)
• Sound returns gradually after channel change. (picture attached)
• Colours flickers and disappears.
• No vertical deflection. (with circuit diagram extract)
• Line output transistor TR7528 fails at switch on.
• No tuning, no remote volume control. (picture attached)
• Strongly distorted sound by low volume.
• Tripping. (picture attached)
• Intermittent green picture, channels cannot be programmed. (picture attached)
• Buzzing from PSU. when cold. (+ extract of circuit diagram)
• Skips channels during tuning. only on certain channels.
• White screen with flyback lines. Excessive brightness which increases until PSU switches to protection mode. (+ extract of circuit diagram)
• No functions. Slow start-up. (extract of circuit diagram attached)
• LED switches on then off immediately.
• Unstable tuning.
• Tuning menu can not be called. All other functions OK. (service info for PHILIPS -20GR105068R)
• Unable to tune or set volume in Prefix mode.
• Loud chriping after switch on. It becomes lower after a short time.
• Trips. at start-up (intermittently). (extract of circuit diagram attached)
• Interference in audio. Interference in picture. (picture attached)
• Distorted audio.
• Picture shifted horizontally. (extract of circuit diagram attached)
• The following production changes were introduced to prevent the set coming on in the store lock mode when switched on from standby. (with circuit diagram extract)
• Sound varies with picture content.
• No function at switch on from standby. Switches to LOCK (hotel) mode. (with circuit diagram extract)
• Doesn't tune stations correctly. When cold, crossed lines on low UHF channels. (picture attached)
• Buzz in audio (intermittently). (+ extract of circuit diagram)
• Unable to retune set or set analogue levels. Store-lock option may be on "Hotel mode".
• Reduced vertical size. at top.
• White unmodulated raster. Picture missing. (picture attached)
• Sometimes when turned on, green screen only with flyback lines, at other times no tuning and channel will not change. (with circuit diagram extract)
• Slow start up of power supply. (with circuit diagram extract) (PHILIPS - 20GR105068R information)
• Programme tuning difficulty. Stations has shifted on tuning bar.
• Does not switch on. LED is lit in standby. If appliance is switched on with RC, LED switches off.
• No standby, humming and standby LED blinks.
• No transmitters to adjust and the sound is not controllable.
• No start-up. intermittently (when cold). (with circuit diagram extract)
• Defective purity.
• Change of C2523.
• No audio.
• Hotel Mode activates by itself. (part of circuit diagram displayed)
• Chopper inoperative. (picture attached)
• The removal of leaded diodes. (+ extract of circuit diagram)
• Whistle. (20GR105068R tip from PHILIPS)
• Change of C2523.
• No line start up; +95 available; +9V is about 4.5V. (with circuit diagram extract)
• Dark picture.
• Excessive green.
• Tuning drift, when it is hot the tuning is lost on channel change.
• To improve performance with prerecorded cassettes. (part of circuit diagram displayed)
• Poor reproduction of copy protected tapes. (+ extract of circuit diagram)
• Vertical oscillator adjustment procedure.
• Vertical line. on the right half screen. (extract of circuit diagram attached)
• Menu rolling. (with circuit diagram extract)
• Dead set. Tries to start.
• How to de-activate volume limiter.
• Line output stage does not start up. (with circuit diagram extract)
• Cannot change tuning or stored settings. (+ extract of circuit diagram) (PHILIPS - 20GR105068R information)
• Unregulated power supply. Pulsating picture and surging sound. (picture attached)
• Horizontal oscillator adjustment procedure.
• Line output stage only starts up for a short time. (picture attached)
• Appliance hums slightly (no speaker) horizontal end stage and power supply transistor are ok. Unfortunately no service instructions available.
• Blank raster. No audio. after a while. (with circuit diagram extract)
• No switch on after activating mains switch. Whistling noise. (+ extract of circuit diagram)
• SIF DET adjustment procedure.
• The TV does not stop during the tuning phase.
• No connection for headphone.
• Set comes on in store lock mode. (extract of circuit diagram attached)
• No audio.
• LED flashes once, then gurgles. (extract of circuit diagram attached) (service info for PHILIPS -20GR105068R)
• V-centre adjustment procedure.
• How to de-activate Hotel mode.
• No picture. No sound. Switching on and off from Standby OK.
• No power supply start up in loaded condition (eg. with lamp). (20GR105068R tip from PHILIPS)
• +B very high. (picture attached)
• Switches off by itself. after a while. (with circuit diagram extract)
• Difficult startup. Rattling sound from line output trafo.
• Line chirps intermittently. Appliance does not start. Only hum from loudspeakers.
• Automatic fine tuning (AFT) field alignment procedure.
• No tuning. only on certain channels.
• Modification at line transformer position 5530. (part of circuit diagram displayed)
• Unstable tuning. (service info for PHILIPS -20GR105068R)
• Replacing the EAROM. (picture attached)
• No picture. (extract of circuit diagram attached)
• No colour. (part of circuit diagram displayed)
• Appliance will not switch on at times, but hums in the power supply section.
• Line tearing. on lower half screen. (extract of circuit diagram attached)
• Streaks in picture. Picture pulls and rolls intermittently.
• During picture changes sometimes a volume increase (plop) is heard. (with circuit diagram extract)
• Intermittent colour.
• Hums softly. (+ extract of circuit diagram)
• How to de-activate Hotel-Mode.
• Slight foldover at upper part of picture if appliance is switched on when cold. Fault disappears after few minutes. (part of circuit diagram displayed)
• PAL colour amplitude adjustment procedure.
• Initial volume level is higher than maximum Hotel mode setting.
• R-Y and B-Y discriminator adjustment procedure. (part of circuit diagram displayed)
• Does not switch on, standby LED OK.
• Sound increases intermittently or "pops", especially during bright scenes. (picture attached)
• No HT from chopper circuit. (extract of circuit diagram attached)
• Sound goes to max. intermittently and HT varies. (part of circuit diagram displayed)
• No function. When switching on with RC, standby LED lights up. (extract of circuit diagram attached)
• Low frequency noise on sound.
• Stored channels are partially lost.
• No audio. (service info for PHILIPS -20GR105068R)
• Stops at start up. (part of circuit diagram displayed)
• Hazy flickering picture at top. (with circuit diagram extract)
• Print with linearity coil pos. 5800.
• Protection device (thyristor THY6641) is triggered at switch on. (part of circuit diagram displayed)
• Stuck in standby. (extract of circuit diagram attached)
• Dark picture. Audio OK .
• No functions. Sound buzzes in loudspeaker. (picture attached)
• Line output transistor becomes warm and in the course of time it becomes defective. (+ extract of circuit diagram)
• Colour amplitude and phase adjustment procedure.
• Intermittent channel drift in UHF. Channel search OK. VHF OK.
• Green picture after few hours, intermittently fault disappears for short while when switching from a station to another. Strange characters in OSD.
• No colour.
• Field collapse normally with blank picture. (part of circuit diagram displayed)