20GR105268B / PHILIPS [TV 51 (47/48) cm picture]

• Error messages indicated by front display flashing. (part of circuit diagram displayed)
• Replacement of TDA7052 with a TDA7052A.
• Low frequency noise on sound.
• Protection device (thyristor THY6641) is triggered at switch on. (part of circuit diagram displayed)
• Searches for channels continuously. (with circuit diagram extract) (20GR105268B tip from PHILIPS)
• Vertical vibration in cold condition of set.
• No +9V, line output stage is OK. (+ extract of circuit diagram)
• Sound varies with picture content.
• The TV cannot hold the picture.
• Search jumps on UHF.
• Height excessive. Defective linearity. Field blanking. (+ extract of circuit diagram)
• No picture, sound ok but on turning up A1 control, frame collapse. (picture attached)
• Line down middle of screen. (with circuit diagram extract)
• Horizontal white line.
• Defective IC7103 SV-production. (+ extract of circuit diagram)
• Interference in audio. Interference in picture. (+ extract of circuit diagram) (PHILIPS - 20GR105268B information)
• Initial volume level is higher than maximum Hotel mode setting.
• No line start up; +95 available; +9V is about 4.5V. (with circuit diagram extract)
• Line output stage TS7528 is defective. (picture attached)
• Reluctant to start up from cold.
• Vertical oscillator adjustment procedure.
• Excessive HV. after a while. (service info for PHILIPS -20GR105268B)
• No audio.
• Horizontal hold adjustment procedure.
• Search jumps on UHF.
• No tuning or on screen tuning display.
• No audio. No picture. OSD OK . (PHILIPS - 20GR105268B information)
• Sound increases intermittently or "pops", especially during bright scenes. (picture attached)
• No picture. No sound. Purring sound in loudspeaker. (with circuit diagram extract) (20GR105268B PHILIPS repair tip)
• Poor synchronisation. when cold. (with circuit diagram extract)
• Intermittent audio and picture. (part of circuit diagram displayed)
• Blue picture. Coloured lines.
• LED flashes once, then gurgles. (with circuit diagram extract)
• Processor numbers (changed).
• Vertical size varies. intermittently.
• Quick hiccup. (+ extract of circuit diagram)
• Change of C2523.
• Blank raster. No audio. after a while. (part of circuit diagram displayed)
• CRT types.
• Memory loss. (part of circuit diagram displayed) (20GR105268B tips)
• No start-up. (part of circuit diagram displayed)
• Dead due to action of over voltage protection circuit. (20GR105268B PHILIPS repair tip)
• Blown chopper. (part of circuit diagram displayed)
• Frame has shifted sideways. Appliance whistles and does not oscillate correctly. (+ extract of circuit diagram)
• How to de-activate Hotel-Mode:
• Doesn't tune stations correctly. When cold, crossed lines on low UHF channels. (extract of circuit diagram attached) (20GR105268B tips)
• Buzz in audio (intermittently). (with circuit diagram extract)
• Humming, motor noise and other unusual noises. Normal picture.
• Skips channels during tuning. (extract of circuit diagram attached)
• Vertical collapse. (extract of circuit diagram attached)
• No or intermittent start-up. (part of circuit diagram displayed)
• Reluctant to start from cold (picture attached)
• No functions. after start-up (intermittently).
• Poor sound, cannot be adjusted louder. When adjusting, sound cuts out. (picture attached)
• Switches to standby. (with circuit diagram extract)
• Buzzing from PSU. when cold. (extract of circuit diagram attached)
• Dead. Power LED is OFF (ON in standby). Hissing from PSU.
• Dark picture. Audio OK .
• Green screen with flyback line. No picture. OSD OK.
• Does not shut down (when cold).
• Change of C2523.
• 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. (+ extract of circuit diagram)
• No vertical deflection. (extract of circuit diagram attached)
• New IR receiver.
• No functions. Sound buzzes in loudspeaker. (with circuit diagram extract)
• Production change to line drive. (with circuit diagram extract)
• Line tearing and rope effect.
• Poor synchronisation. (with circuit diagram extract)
• Blank raster. Flyback lines. (extract of circuit diagram attached)
• No audio.
• No transmitters to adjust and the sound is not controllable.
• Green raster. Faint picture. Flyback lines.
• Green picture. after warm-up. Lines in picture. after warm-up. Does not change channels.
• Programming unoperational. Limited sound adjustment possible.
• No audio.
• Tuning drifts. only on certain channels (after a while).
• Programs and PP-settings cannot be changed.
• Picture appears slowly.
• Intermittent channel drift in UHF. Channel search OK. VHF OK.
• Control panel cover. (20GR105268B tip from PHILIPS)
• Random breakdown of line output transistor. (part of circuit diagram displayed)
• Spurious nonsense OSG. Goes to standby after 0.5-2hrs. Loss of tuning.
• Turns on automatically. No RC or front panel controls. (service info for PHILIPS -20GR105268B)
• Volume goes to max. No volume control. (service info for PHILIPS -20GR105268B)
• Power supply does not oscillate. (with circuit diagram extract)
• Low audio. (part of circuit diagram displayed)
• Will not tune, drifts, colour disappears or interference on a certain channel. (e.g. channel 5 and 59) (20GR105268B tips)
• No colour and vertical black bar across screen.
• How to de-activate Hotel mode.
• PSU switches off with load at U95V. (picture attached)
• Unable to retune set or set analogue levels. Store-lock option may be on "Hotel mode".
• No regulation. (extract of circuit diagram attached)
• Line output stage does not start up. (+ extract of circuit diagram)
• Dead set. Tries to start.
• Colours flicker and disappears.
• Set does not retune or program etc
• Doesn't store stations correctly.
• No functions. Slow start-up. (part of circuit diagram displayed)
• Appliance does not function with standby light flashing.
• Set goes accidentally into hotel mode.
• Chopper inoperative. (part of circuit diagram displayed)
• Dim picture with Hanover bars.
• Defective purity.
• Error codes.
• +9V supply modification. (with circuit diagram extract)
• Intermittently dead. after start-up. (20GR105268B tips)
• Red picture. Flyback lines.
• Dead with whistling noise coming from power supply. (extract of circuit diagram attached) (service info for PHILIPS -20GR105268B)
• No sound or picture. Low hum from speaker. (extract of circuit diagram attached)
• Comes on for a short time. (service info for PHILIPS -20GR105268B)
• 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.
• Line chirps intermittently. Appliance does not start. Only hum from loudspeakers.
• Intermittently dead. (+ extract of circuit diagram)
• Difficult to tune programmes, stations shifted on tuning bar.
• Sound varies with picture content.
• Green screen with flyback lines. Green oscillations. Noise as if HV leaky on picture tube base. (extract of circuit diagram attached)
• Adjustment of +95V. (+ extract of circuit diagram)
• Volume change with great fluctuations in brightness. (+ extract of circuit diagram) (20GR105268B tips)
• Enable Hotel mode.
• No tuning.
• Right side of picture discoloured.
• No picture. TXT OK . (picture attached)
• No picture. No sound. Switching on and off from Standby OK.
• No functions, hum in loudspeakers. (extract of circuit diagram attached)
• No start-up. when cold. (picture attached)
• The removal of leaded diodes. (with circuit diagram extract)
• No channel search. No OSD. (+ extract of circuit diagram)
• Settings do not stay in position.
• Very slight vertical foldover with interferences similar to EHT arcing, especially on very white scenes.
• Line tearing. on lower half screen. (part of circuit diagram displayed) (20GR105268B tips)
• No tuning. No channel lock. (+ extract of circuit diagram)
• 95V available. 9V is only 5.2V. Slight buzzing from loudspeakers.
• Appliance hums slightly (no speaker) horizontal end stage and power supply transistor are ok. Unfortunately no service instructions available. (20GR105268B PHILIPS repair tip)
• Stored channels are partially lost.
• Sound goes to max. intermittently and HT varies. (extract of circuit diagram attached)
• Excessive green.
• Excessive horizontal size.
• Unstable tuning.
• Picture shifted to the left. intermittently. Line tearing. intermittently. (extract of circuit diagram attached)
• Tuning drifts. (part of circuit diagram displayed)
• No audio.
• Difficult startup. Rattling sound from line output trafo.
• "Store" key does not work. (extract of circuit diagram attached)
• Hums softly. (picture attached)
• Slow start up of power supply. (extract of circuit diagram attached)
• No tuning. Impossible to change analog control adjustments (brightness, sound, etc.). (picture attached)
• Line tearing, especially with bright scences. (picture attached)
• Hazy flickering picture at top. (extract of circuit diagram attached)
• No tuning possible, F2 appears on bottom of picture and S1 on top.
• High voltage transistor defective after a while. (PHILIPS - 20GR105268B information)
• Rolling or jittering picture. (with circuit diagram extract)
• Memory cannot be opened via "rhombus". Stored channels cannot be changed.
• No sound or raster. The 95V HT supply is present at the line output stage but there is no line drive. (part of circuit diagram displayed)
• Focus adjustment.
• No picture. Audio OK .
• Service manual correction. (+ extract of circuit diagram)
• Picture shifted horizontally. (picture attached)
• Dead. At switch on the stand by LED flashes.
• Intermittent colour.
• No switch on. Weak whistling noise from PSU. LED is OFF. (20GR105268B tip from PHILIPS)
• No line output stage. (+ extract of circuit diagram)
• White unmodulated raster. Picture missing. (picture attached)
• Cannot be programmed and search does not function. Only limited volume adjustable.
• No colour. (20GR105268B tip from PHILIPS)
• No colour in OSD.
• The fuse and the bridge diodes in the power supply blow.
• Picture is mostly green with flyback lines after 10 secs from switch on.
• Green picture with retrace lines. After a few restarts picture OK.
• To remove store/lock.
• No function. Motorboating from PSU. TV starts up randomly. Intermittent fault.
• PAL colour amplitude adjustment procedure.
• Modification introduced to +9V supply.
• Modification at line transformer position 5530. (extract of circuit diagram attached)
• Change of C2523.
• Becomes defective immediately after switch on.
• PSU peeps +95 is ca 0,8v
• Occasionally appliance does not switch on from standby. No further functions are possible.
• Stored channels drift off tune briefly after switch on. Crackle in sound.
• No functions. Hum in loudspeaker. No LED lit.
• No voltage from PSU. (+ extract of circuit diagram)
• Stuck in hotel mode.
• No audio.
• Does not stop on stations.
• Only some programs with snowy picture can be tuned and on band 1 missing some programs. (picture attached)
• No function. Standby-LED lights up. Appliance switches on but no picture or sound.
• Difficultly in tuning to correct position.
• White balance adjustment.
• Two lines going around. (with circuit diagram extract)
• Reduced vertical size. at top.
• Right hand side of screen has a line.
• Loosing colour during play-back of a video tape. (+ extract of circuit diagram)
• No audio.
• Whistle.
• Power supply fault finding. (with circuit diagram extract)
• Replacement of surface mounted diode 6637. (with circuit diagram extract)
• Stations won't change. Picture and sound OK. Other functions OK.
• Whistling.
• No picture (when cold).
• Squealing from PSU.
• SOPS defective. (extract of circuit diagram attached)
• Picture passes out in the centre. (service info for PHILIPS -20GR105268B)
• Unstable tuning.
• Green picture after few hours, intermittently fault disappears for short while when switching from a station to another. Strange characters in OSD.
• Stops at start up. (part of circuit diagram displayed)
• Slow start-up.
• SIF DET adjustment procedure. (20GR105268B tips)
• No start-up. intermittently (when cold). (part of circuit diagram displayed)
• No picture or sound but RCU works correctly. LED flashes when the handset is tried. (with circuit diagram extract)
• New infra red receiver.
• Set dead with just 5V on the 95V line. Standby LED is on but set won't start. (extract of circuit diagram attached)
• No switch on after activating mains switch. Whistling noise. (picture attached)
• No HV.
• Memory content dropout at positions 4 and 5.
• Picture displays lines and strange foldover effect at centre.
• No operation.
• No start-up. intermittently.
• Dead. Only standby-LED works. Responds to TURN ON command, but no image and no sound.
• Dead. Low hum.
• Does not start. Slight buzzing in loudspeaker.
• +B very high. (with circuit diagram extract)
• Standby just pulsing. (20GR105268B tips)
• No freeze frame or intermittent freeze frame; no sound. (picture attached)
• Correction to service manual LOT winding.
• No OSD. Picture OK .
• Line output transistor TR7528 fails at switch on. (20GR105268B tip from PHILIPS)
• Trips. at start-up (intermittently). (with circuit diagram extract)
• Intermittently narrow picture, but corrects itself shortly after.
• Blank raster. OSD OK .
• 6613 type change. (extract of circuit diagram attached) (20GR105268B PHILIPS repair tip)
• Lines across top of picture about 8" in first 100 lines. (with circuit diagram extract)
• LED switches on then off immediately.
• Low 5V to micro chip. (with circuit diagram extract)
• Line output transistor replacement.
• No function. When switching on with RC, standby LED lights up. (part of circuit diagram displayed)
• Initial volume level is higher than maximum Hotel mode setting.
• No sound. Picture OK. After a short time TV stops. High frequency noise from PSU. (+ extract of circuit diagram)
• Picture is faint with hanover bars. (extract of circuit diagram attached)
• Green picture.
• Dead. Low frequency noise on sound.
• Standby LED lights up and switches off at power on. Appliance will not start up.
• Does not switch on, standby LED OK. (20GR105268B tip from PHILIPS)
• No start-up. Standby LED flashes .
• The following production changes were introduced to prevent the set coming on in the store lock mode when switched on from standby. (part of circuit diagram displayed)
• Horizontal oscillator adjustment procedure.
• White screen with flyback lines. Excessive brightness which increases until PSU switches to protection mode. (with circuit diagram extract)
• No HT from chopper circuit. (part of circuit diagram displayed)
• Blank or green raster. Flyback lines. Faint picture or normal picture. (part of circuit diagram displayed)
• Colours flickers and disappears.
• Sound varies with picture content.
• Unstable tuning.
• Sometimes when turned on, green screen only with flyback lines, at other times no tuning and channel will not change. (part of circuit diagram displayed)
• Change of C2523.
• Tuning drifts. only on certain channels.
• Appliance can not be programmed. Search does not function. Only limited volume control.
• Does not start up. Light buzz from loudspeaker. Standby LED produces one brief blink.
• Tuning menu can not be called. All other functions OK. (20GR105268B tip from PHILIPS)
• How to switch OFF Hotel-Mode.
• Picture separating line appears. Whistling. (20GR105268B tips)
• Bright picture. Flyback lines.
• Print with linearity coil pos. 5800.
• Won't tune a new channel. Won't activate store function. Picture OK. Sound OK.
• Picture shifts. (part of circuit diagram displayed)
• Excessive brightness. (service info for PHILIPS -20GR105268B)
• Set comes on in store lock mode. (+ extract of circuit diagram) (20GR105268B tip from PHILIPS)
• Field collapse normally with blank picture. (extract of circuit diagram attached)
• How to de-activate volume limiter.
• Comes on in standby. When program button pressed standby lamp blinks then goes off. (20GR105268B tips)
• No functions. Standby LED flashes. Relay switches to ON.
• No audio.
• Fizzling sound from speakers at start-up and intermittently picture jagged.
• No line output. (20GR105268B tips)
• Poor reproduction of copy protected tapes. (+ extract of circuit diagram)
• Poor sync. AGC fault.
• No picture, only squeaks for a short time at switch on then no more functions.
• Microcomputers and screening plate. (20GR105268B PHILIPS repair tip)
• U743 tuner replacement. (with circuit diagram extract)
• Wavy picture. on the right.
• Colour disappears with VCR-scan (picture search). (part of circuit diagram displayed)
• Does not switch on. LED is lit in standby. If appliance is switched on with RC, LED switches off. (20GR105268B tips)
• Set won't tune to high frequency channels and lower frequency channels appear to be higher. (+ extract of circuit diagram)
• No tuning - no channels.
• Sound motorboating when cold. (+ extract of circuit diagram)
• Vertical line. on the right half screen. (picture attached)
• Enable Hotel mode. Disable hotel mode.
• 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.
• Field foldover at switch on from cold. Effect disappears when appliance warms up. (extract of circuit diagram attached)
• Colour flickers. No colour. after a while. (part of circuit diagram displayed)
• To release hotel mode (child lock).
• Bell filter adjustment procedure.
• Intermittent colour.
• Tripping. (with circuit diagram extract)
• Using a lamp as a load.
• Noise in sound. Mute does not function.
• Slight foldover at upper part of picture if appliance is switched on when cold. Fault disappears after few minutes. (part of circuit diagram displayed)
• Green picture.
• 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)
• How to switch off Hotel-Mode:
• Distorted audio.
• Picture shifted to the right. (extract of circuit diagram attached)
• Tuning procedure. (20GR105268B tip from PHILIPS)
• Line output stage only starts up for a short time. (extract of circuit diagram attached)
• Sound varies with picture content.
• After switching on the CTV "EXT...1.2.3..." appears on the screen.
• Green picture. (+ extract of circuit diagram)
• Buzzing.
• Streaks in picture. Picture pulls and rolls intermittently.
• Enter service mode.
• Loud chriping after switch on. It becomes lower after a short time.
• Programme tuning difficulty, stations shifted on tuning bar. (picture attached)
• Description of SMPS. (picture attached)
• Line output transistor running hot. (picture attached)
• Connection of a loop system to the TV.
• No connection for headphone.
• Reduced horizontal size. (extract of circuit diagram attached)
• Buzzing sound then switches off.
• Stuck in standby. (+ extract of circuit diagram)
• To put into hotel mode.
• After replacement of the line output transistor BUT12, picture with trapezoid effect, BUT12 overheats and goes defective again. (with circuit diagram extract)
• Vertical amplitude cannot be fully adjusted, TXT lines can be seen. (+ extract of circuit diagram)
• Whistling from PSU. (with circuit diagram extract)
• Automatic fine tuning (AFT) field alignment procedure.
• Intermittent colour and intermittent dark vertical bar on picture.
• Low audio.
• Colours flickers and disappears.
• Trips. (with circuit diagram extract)
• Appliance will not switch on at times, but hums in the power supply section.
• Delay RF AGC adjustment procedure.
• No sound. No picture. Faint motorboating noise.
• How to de-activate Hotel-Mode.
• Smeary, washed out picture with bent verticals. (part of circuit diagram displayed)
• No picture. OSD OK .
• Volume varies. depending on picture content. (+ extract of circuit diagram)
• Dim picture with Hanover bars visible. (extract of circuit diagram attached)
• Cannot change tuning or stored settings. (part of circuit diagram displayed)
• No colour. (with circuit diagram extract)
• No tuning bar when install button pressed and set not in hotel mode. (with circuit diagram extract)
• Sound returns gradually after channel change. (picture attached)
• Initial volume level is higher than maximum hotel mode setting.
• Dead. Only hum from speakers. (part of circuit diagram displayed)
• Slow hiccup (extract of circuit diagram attached)
• Picture fails for a short time. (+ extract of circuit diagram)
• No function. Standby LED flashes briefly. (part of circuit diagram displayed)
• Crackling and popping in sound after a short time.
• Picture only in two bars in upper screen section, the rest is dark. (+ extract of circuit diagram)
• Colour amplitude and phase adjustment procedure.
• Intermittent colour.
• The tone (sound) tunes well, but the volume cannot be raised.
• Hotel Mode activates by itself. (picture attached)
• Switches off by itself. after a while. (part of circuit diagram displayed)
• No power with abnormal sound. (picture attached)
• Dead. Strange noises from PSU/ line output transformer. (with circuit diagram extract)
• Programme tuning difficulty. Stations has shifted on tuning bar.
• Microprocessor screening plate. (extract of circuit diagram attached)
• Strongly distorted sound by low volume.
• Intermittent destruction of line o/p transistor. (with circuit diagram extract)
• Search jumps on UHF.
• During picture changes sometimes a volume increase (plop) is heard. (part of circuit diagram displayed)
• No switch on. Low noise on sound. (picture attached) (PHILIPS - 20GR105268B information)
• The switched-mode power supply cannot be loaded.
• Vertical roll. (+ extract of circuit diagram)
• No function at switch on from standby. Switches to LOCK (hotel) mode. (with circuit diagram extract)
• Dark picture. (PHILIPS - 20GR105268B information)
• No function, starts up from standby, then goes out.
• No standby, humming and standby LED blinks.
• Local controls inoperative.
• Excessive vertical size.
• No picture. (extract of circuit diagram attached)
• Line transistor 7528 blows within 1 sec. (part of circuit diagram displayed)
• Buzz in audio. No picture.
• Unstable tuning. (20GR105268B PHILIPS repair tip)
• No start up from cold and humming.
• No start-up. Buzzing from speakers and working noise of PSU.
• Dead. Low level buzz from loudspeaker. (part of circuit diagram displayed)
• How to reset microprocessor.
• No SOP supply. (picture attached)
• No start up. No standby. Attempts to start up, but fails.
• Does not regulate +95V.
• Dead. (part of circuit diagram displayed) (20GR105268B tip from PHILIPS)
• Control micro processors.
• No frame or short frame. (extract of circuit diagram attached) (service info for PHILIPS -20GR105268B)
• LED does not flash. Slight buzz in appliance. (extract of circuit diagram attached)
• Volume can't be tuned down. No tuning with RC. (extract of circuit diagram attached)
• Does not start up at once from cold.
• To improve performance with prerecorded cassettes. (+ extract of circuit diagram)
• Replacing the EAROM. (picture attached)
• Initial volume level is higher than maximum Hotel mode setting.
• No power supply start up in loaded condition (eg. with lamp).
• Colour sync adjustment procedure.
• Intermittent green picture, channels cannot be programmed. (part of circuit diagram displayed)
• 10V on 95V line. (extract of circuit diagram attached)
• The picture is slightly yellow, flyback lines. Slightly noisy, no own recording possible.
• Unregulated power supply. Pulsating picture and surging sound. (extract of circuit diagram attached)
• How to enter/exit HOTEL mode.
• No colour.
• Limited volume. No channel search.
• R-Y and B-Y discriminator adjustment procedure. (part of circuit diagram displayed)
• No start up, just a buzzing noise in speakers. (+ extract of circuit diagram)
• No tuning. only on certain channels. (service info for PHILIPS -20GR105268B)
• After working normally for a while the TV blocks in any position. The functions do not work.
• Noise in audio. (20GR105268B PHILIPS repair tip)
• Programme channel search cannot be called up.
• Line out of phase. Black band in centre of screen. No colour.
• No horizontal synchronisation. (+ extract of circuit diagram)
• PSU does not start up, if appliance was switched off for a day. Appliance functions after short switch on/off. (with circuit diagram extract)
• Bright flash on screen and no picture or sound after a few minutes. (extract of circuit diagram attached)
• Menu rolling. (picture attached)
• Green screen and at other times no tuning. (with circuit diagram extract)
• Picture is poor with rippling on verticals. (+ extract of circuit diagram)
• Hotel mode.
• Unable to tune or set volume in Prefix mode.
• Identification coil adjustment.
• No colour.
• No tuning. (with circuit diagram extract)
• Picture centering has shifted horizontally. No OSD.
• Skips channels during tuning. only on certain channels.
• Intermittently no picture and sound at switch on. Buzz from speaker. (picture attached)
• Secondary main power supply OK except +9V at 5.8V
• Bright flash on screen. No picture or sound. (with circuit diagram extract)
• No tuning, no remote volume control. (with circuit diagram extract)
• Line output transistor becomes warm and in the course of time it becomes defective. (with circuit diagram extract)
• No picture. No audio. (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. (service info for PHILIPS -20GR105268B)
• Initial volume level is higher than maximum Hotel mode setting.
• Tuning drift, when it is hot the tuning is lost on channel change.
• How to switch off Hotel-Mode.
• Failures in the power supply. (extract of circuit diagram attached) (service info for PHILIPS -20GR105268B)
• Appliance is dead with standby LED flashing after a few seconds. (picture attached)
• Line output stage does not function.
• No voltage from PSU, computer does not work. (picture attached) (service info for PHILIPS -20GR105268B)
• No functions. when cold.
• Store lock on the appliance.
• Stops working every 2 or 3 hrs. Only starts again after switching off and on again.
• Only half a picture. (extract of circuit diagram attached)
• Dead, very slight whistle from PSU.
• Drive for high voltage missing. (picture attached)
• No picture and sound. Low hum intermittently, no function.
• Lines on picture after approx one hour. It consists of a band of bright white lines about two inches wide. (picture attached)
• The TV does not stop during the tuning phase. (20GR105268B tip from PHILIPS)
• Change of C2523.
• Display goes to F1 a few seconds after switching the set on.
• V-centre adjustment procedure.
• Line output transistor fails repeatedly. (with circuit diagram extract)
• PSU check.