20GR105267B / PHILIPS [TV 51 (47/48) cm picture]

• Bright flash on screen. No picture or sound. (part of circuit diagram displayed) (PHILIPS - 20GR105267B information)
• Line transistor 7528 blows within 1 sec. (+ extract of circuit diagram)
• Adjustment of +95V. (with circuit diagram extract)
• Does not start up. Light buzz from loudspeaker. Standby LED produces one brief blink.
• Picture shifted to the left. intermittently. Line tearing. intermittently. (+ extract of circuit diagram)
• Search jumps on UHF. (20GR105267B PHILIPS repair tip)
• Initial volume level is higher than maximum Hotel mode setting.
• No functions. Standby LED flashes. Relay switches to ON.
• Right hand side of screen has a line.
• Change of C2523.
• Slow hiccup (part of circuit diagram displayed)
• Failures in the power supply. (picture attached)
• Green picture. after warm-up. Lines in picture. after warm-up. Does not change channels.
• Line output stage only starts up for a short time. (part of circuit diagram displayed)
• Unstable tuning.
• Intermittent green picture, channels cannot be programmed. (with circuit diagram extract)
• Green picture with retrace lines. After a few restarts picture OK.
• V-centre adjustment procedure.
• Line output stage does not function.
• Intermittent channel drift in UHF. Channel search OK. VHF OK.
• Very slight vertical foldover with interferences similar to EHT arcing, especially on very white scenes.
• Initial volume level is higher than maximum Hotel mode setting.
• Line tearing and rope effect.
• Two lines going around. (with circuit diagram extract) (20GR105267B PHILIPS repair tip)
• Line output transistor becomes warm and in the course of time it becomes defective. (with circuit diagram extract)
• After working normally for a while the TV blocks in any position. The functions do not work.
• No frame or short frame. (picture attached)
• Blank raster. OSD OK .
• No colour and vertical black bar across screen.
• No switch on. Low noise on sound. (picture attached)
• Rolling or jittering picture. (with circuit diagram extract)
• Strongly distorted sound by low volume.
• No tuning, no remote volume control. (extract of circuit diagram attached)
• Comes on for a short time.
• Line chirps intermittently. Appliance does not start. Only hum from loudspeakers. (service info for PHILIPS -20GR105267B)
• Picture shifts. (+ extract of circuit diagram) (20GR105267B tip from PHILIPS)
• No switch on. Weak whistling noise from PSU. LED is OFF.
• No colour.
• Processor numbers (changed).
• +B very high. (+ extract of circuit diagram)
• Line output transistor running hot. (with circuit diagram extract)
• Set won't tune to high frequency channels and lower frequency channels appear to be higher. (picture attached)
• Volume change with great fluctuations in brightness. (+ extract of circuit diagram)
• Change of C2523.
• Picture fails for a short time. (+ extract of circuit diagram)
• Standby just pulsing.
• Green picture.
• Poor synchronisation. when cold. (part of circuit diagram displayed)
• Does not stop on stations.
• Tuning drifts. only on certain channels.
• Modification at line transformer position 5530. (+ extract of circuit diagram)
• Doesn't tune stations correctly. When cold, crossed lines on low UHF channels. (picture attached)
• Excessive vertical size.
• Hotel mode.
• Set does not retune or program etc
• Trips. (extract of circuit diagram attached)
• Replacement of surface mounted diode 6637. (picture attached)
• No functions. Sound buzzes in loudspeaker. (part of circuit diagram displayed) (PHILIPS - 20GR105267B information)
• Excessive HV. after a while.
• Frame has shifted sideways. Appliance whistles and does not oscillate correctly. (part of circuit diagram displayed)
• Defective purity.
• Noise in audio.
• No or intermittent start-up. (with circuit diagram extract)
• Horizontal oscillator adjustment procedure.
• No sound or picture. Low hum from speaker. (picture attached)
• Excessive green.
• Dark picture.
• Colours flickers and disappears.
• No functions, hum in loudspeakers. (picture attached)
• Intermittent colour and intermittent dark vertical bar on picture.
• White balance adjustment.
• No picture. No audio. (with circuit diagram extract)
• Stops at start up. (picture attached)
• 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.
• No picture and sound. Low hum intermittently, no function.
• Does not start. Slight buzzing in loudspeaker.
• Low audio.
• No start up. No standby. Attempts to start up, but fails.
• No audio.
• Skips channels during tuning. only on certain channels. (20GR105267B PHILIPS repair tip)
• Excessive brightness.
• No tuning. only on certain channels.
• Line down middle of screen. (part of circuit diagram displayed)
• Set dead with just 5V on the 95V line. Standby LED is on but set won't start. (+ extract of circuit diagram)
• No audio.
• Sound varies with picture content.
• Line tearing. on lower half screen. (part of circuit diagram displayed)
• Local controls inoperative. (20GR105267B PHILIPS repair tip)
• PSU does not start up, if appliance was switched off for a day. Appliance functions after short switch on/off. (extract of circuit diagram attached) (20GR105267B PHILIPS repair tip)
• No vertical deflection. (part of circuit diagram displayed)
• Service manual correction. (extract of circuit diagram attached)
• 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)
• Line output transistor TR7528 fails at switch on.
• Colours flickers and disappears.
• Dim picture with Hanover bars.
• Dead. Only hum from speakers. (picture attached)
• Delay RF AGC adjustment procedure. (PHILIPS - 20GR105267B information)
• Standby LED lights up and switches off at power on. Appliance will not start up.
• Poor sync. AGC fault.
• No freeze frame or intermittent freeze frame; no sound. (+ extract of circuit diagram)
• Searches for channels continuously. (+ extract of circuit diagram)
• Poor synchronisation. (extract of circuit diagram attached)
• No power supply start up in loaded condition (eg. with lamp). (20GR105267B PHILIPS repair tip)
• Volume can't be tuned down. No tuning with RC. (part of circuit diagram displayed)
• No functions. when cold.
• To improve performance with prerecorded cassettes. (part of circuit diagram displayed)
• No audio.
• New infra red receiver.
• No audio.
• No function. Standby LED flashes briefly. (picture attached)
• To release hotel mode (child lock).
• Difficultly in tuning to correct position.
• No operation.
• Reluctant to start up from cold.
• Set comes on in store lock mode. (picture attached)
• Dead. Only standby-LED works. Responds to TURN ON command, but no image and no sound.
• Green picture.
• Store lock on the appliance.
• No start-up. Standby LED flashes .
• Picture centering has shifted horizontally. No OSD.
• Buzz in audio. No picture.
• Line output transistor fails repeatedly. (with circuit diagram extract)
• U743 tuner replacement. (picture attached)
• No SOP supply. (with circuit diagram extract) (20GR105267B tip from PHILIPS)
• Dead. Low frequency noise on sound. (service info for PHILIPS -20GR105267B)
• Programming unoperational. Limited sound adjustment possible.
• Quick hiccup. (picture attached)
• Blown chopper. (part of circuit diagram displayed)
• How to enter/exit HOTEL mode. (20GR105267B tip from PHILIPS)
• 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)
• Intermittent colour.
• Vertical collapse. (with circuit diagram extract)
• Control panel cover.
• Dead due to action of over voltage protection circuit.
• 10V on 95V line. (picture attached)
• Loosing colour during play-back of a video tape. (part of circuit diagram displayed)
• Power supply does not oscillate. (with circuit diagram extract)
• Hotel Mode activates by itself. (picture attached)
• No function. When switching on with RC, standby LED lights up. (picture attached) (20GR105267B tip from PHILIPS)
• No audio.
• Vertical amplitude cannot be fully adjusted, TXT lines can be seen. (part of circuit diagram displayed)
• No picture. OSD OK .
• No audio.
• Tuning drift, when it is hot the tuning is lost on channel change.
• Tripping. (picture attached)
• Does not switch on, standby LED OK.
• The TV does not stop during the tuning phase.
• 95V available. 9V is only 5.2V. Slight buzzing from loudspeakers.
• Switches off by itself. after a while. (extract of circuit diagram attached)
• Replacement of TDA7052 with a TDA7052A.
• Random breakdown of line output transistor. (extract of circuit diagram attached)
• Control micro processors.
• Loud chriping after switch on. It becomes lower after a short time.
• Initial volume level is higher than maximum Hotel mode setting.
• No start-up. (extract of circuit diagram attached)
• Doesn't store stations correctly.
• Appliance is dead with standby LED flashing after a few seconds. (picture attached)
• R-Y and B-Y discriminator adjustment procedure. (with circuit diagram extract)
• No power with abnormal sound. (picture attached)
• No transmitters to adjust and the sound is not controllable. (PHILIPS - 20GR105267B information)
• PAL colour amplitude adjustment procedure.
• Secondary main power supply OK except +9V at 5.8V
• Picture shifted to the right. (+ extract of circuit diagram)
• No colour.
• Dead. Low level buzz from loudspeaker. (part of circuit diagram displayed)
• Dead. Power LED is OFF (ON in standby). Hissing from PSU.
• Smeary, washed out picture with bent verticals. (extract of circuit diagram attached) (20GR105267B tip from PHILIPS)
• No line output stage. (part of circuit diagram displayed) (service info for PHILIPS -20GR105267B)
• Defective IC7103 SV-production. (+ extract of circuit diagram)
• No start-up. intermittently (when cold). (+ extract of circuit diagram)
• Green picture after few hours, intermittently fault disappears for short while when switching from a station to another. Strange characters in OSD.
• Programme tuning difficulty. Stations has shifted on tuning bar.
• After replacement of the line output transistor BUT12, picture with trapezoid effect, BUT12 overheats and goes defective again. (part of circuit diagram displayed)
• Becomes defective immediately after switch on.
• Print with linearity coil pos. 5800.
• Appliance will not switch on at times, but hums in the power supply section.
• Memory content dropout at positions 4 and 5.
• Picture separating line appears. Whistling.
• Humming, motor noise and other unusual noises. Normal picture. (20GR105267B tip from PHILIPS)
• Change of C2523.
• No functions. Hum in loudspeaker. No LED lit.
• Dead. Low hum.
• Does not switch on. LED is lit in standby. If appliance is switched on with RC, LED switches off.
• No function. Motorboating from PSU. TV starts up randomly. Intermittent fault.
• Enter service mode.
• Height excessive. Defective linearity. Field blanking. (part of circuit diagram displayed)
• Vertical size varies. intermittently.
• Production change to line drive. (extract of circuit diagram attached)
• No picture. TXT OK . (picture attached)
• LED switches on then off immediately.
• Comes on in standby. When program button pressed standby lamp blinks then goes off.
• PSU switches off with load at U95V. (part of circuit diagram displayed)
• Intermittent destruction of line o/p transistor. (+ extract of circuit diagram)
• Slight foldover at upper part of picture if appliance is switched on when cold. Fault disappears after few minutes. (extract of circuit diagram attached) (20GR105267B tips)
• No start-up. intermittently.
• Intermittent colour.
• Occasionally appliance does not switch on from standby. No further functions are possible.
• Field foldover at switch on from cold. Effect disappears when appliance warms up. (with circuit diagram extract)
• Tuning drifts. only on certain channels (after a while).
• Modification introduced to +9V supply. (20GR105267B PHILIPS repair tip)
• Difficult startup. Rattling sound from line output trafo. (20GR105267B PHILIPS repair tip)
• No tuning.
• Dark picture. Audio OK . (service info for PHILIPS -20GR105267B)
• Won't tune a new channel. Won't activate store function. Picture OK. Sound OK.
• No colour in OSD.
• No voltage from PSU, computer does not work. (with circuit diagram extract)
• Noise in sound. Mute does not function.
• Streaks in picture. Picture pulls and rolls intermittently.
• Blank raster. Flyback lines. (part of circuit diagram displayed)
• No functions. Slow start-up. (extract of circuit diagram attached)
• Intermittent colour.
• Appliance hums slightly (no speaker) horizontal end stage and power supply transistor are ok. Unfortunately no service instructions available.
• 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)
• No function at switch on from standby. Switches to LOCK (hotel) mode. (picture attached)
• No picture. No sound. Purring sound in loudspeaker. (picture attached)
• Enable Hotel mode.
• Switches to standby. (with circuit diagram extract)
• Focus adjustment.
• Picture shifted horizontally. (picture attached)
• Volume goes to max. No volume control.
• Buzzing. (PHILIPS - 20GR105267B information)
• Dead, very slight whistle from PSU.
• PSU peeps +95 is ca 0,8v
• No function, starts up from standby, then goes out.
• Dead. (part of circuit diagram displayed)
• 6613 type change. (extract of circuit diagram attached)
• During picture changes sometimes a volume increase (plop) is heard. (part of circuit diagram displayed)
• After switching on the CTV "EXT...1.2.3..." appears on the screen.
• Wavy picture. on the right.
• The tone (sound) tunes well, but the volume cannot be raised. (20GR105267B PHILIPS repair tip)
• Volume varies. depending on picture content. (picture attached)
• Intermittently narrow picture, but corrects itself shortly after.
• Green screen with flyback lines. Green oscillations. Noise as if HV leaky on picture tube base. (with circuit diagram extract)
• How to switch OFF Hotel-Mode.
• Hazy flickering picture at top. (part of circuit diagram displayed)
• Using a lamp as a load.
• Protection device (thyristor THY6641) is triggered at switch on. (+ extract of circuit diagram)
• The removal of leaded diodes. (extract of circuit diagram attached)
• Line output transistor replacement.
• Stops working every 2 or 3 hrs. Only starts again after switching off and on again.
• Lines on picture after approx one hour. It consists of a band of bright white lines about two inches wide. (with circuit diagram extract)
• Excessive horizontal size.
• Right side of picture discoloured.
• Memory loss. (picture attached)
• No start up, just a buzzing noise in speakers. (extract of circuit diagram attached)
• No OSD. Picture OK .
• Dead. Strange noises from PSU/ line output transformer. (with circuit diagram extract)
• Picture appears slowly.
• Search jumps on UHF.
• Unstable tuning.
• No channel search. No OSD. (picture attached)
• Spurious nonsense OSG. Goes to standby after 0.5-2hrs. Loss of tuning.
• No standby, humming and standby LED blinks.
• Only some programs with snowy picture can be tuned and on band 1 missing some programs. (part of circuit diagram displayed)
• Bright picture. Flyback lines.
• Microprocessor screening plate. (part of circuit diagram displayed)
• Skips channels during tuning. (extract of circuit diagram attached)
• Picture passes out in the centre.
• Dead set. Tries to start.
• No sound. No picture. Faint motorboating noise.
• Stations won't change. Picture and sound OK. Other functions OK.
• Picture is faint with hanover bars. (extract of circuit diagram attached)
• Fizzling sound from speakers at start-up and intermittently picture jagged.
• Microcomputers and screening plate.
• Search jumps on UHF.
• No functions. after start-up (intermittently).
• Unstable tuning.
• Turns on automatically. No RC or front panel controls.
• Settings do not stay in position.
• Appliance does not function with standby light flashing.
• Interference in audio. Interference in picture. (+ extract of circuit diagram)
• No picture, sound ok but on turning up A1 control, frame collapse. (picture attached)
• Unable to retune set or set analogue levels. Store-lock option may be on "Hotel mode".
• SIF DET adjustment procedure.
• Does not regulate +95V.
• Dead. At switch on the stand by LED flashes. (PHILIPS - 20GR105267B information)
• Whistling from PSU. (picture attached)
• Stored channels are partially lost.
• Programme channel search cannot be called up.
• SOPS defective. (extract of circuit diagram attached)
• Buzzing from PSU. when cold. (extract of circuit diagram attached)
• Sound varies with picture content. (20GR105267B tips)
• The switched-mode power supply cannot be loaded. (20GR105267B tip from PHILIPS)
• How to de-activate Hotel mode.
• Trips. at start-up (intermittently). (picture attached)
• Bell filter adjustment procedure.
• Vertical line. on the right half screen. (extract of circuit diagram attached)
• Error codes.
• Cannot change tuning or stored settings. (extract of circuit diagram attached)
• Sound varies with picture content. (service info for PHILIPS -20GR105267B)
• White unmodulated raster. Picture missing. (with circuit diagram extract)
• No sound. Picture OK. After a short time TV stops. High frequency noise from PSU. (+ extract of circuit diagram)
• New IR receiver.
• Replacing the EAROM. (picture attached)
• Blank raster. No audio. after a while. (with circuit diagram extract)
• Unstable tuning. (20GR105267B PHILIPS repair tip)
• Correction to service manual LOT winding.
• No line start up; +95 available; +9V is about 4.5V. (picture attached)
• The TV cannot hold the picture.
• No tuning. No channel lock. (+ extract of circuit diagram)
• Line output stage does not start up. (extract of circuit diagram attached)
• Green screen with flyback line. No picture. OSD OK.
• Horizontal hold adjustment procedure.
• Vertical vibration in cold condition of set.
• "Store" key does not work. (extract of circuit diagram attached)
• Sound goes to max. intermittently and HT varies. (with circuit diagram extract) (PHILIPS - 20GR105267B information)
• Set goes accidentally into hotel mode.
• Automatic fine tuning (AFT) field alignment procedure.
• Menu rolling. (part of circuit diagram displayed)
• Tuning procedure.
• Vertical roll. (+ extract of circuit diagram)
• 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.
• No tuning. Impossible to change analog control adjustments (brightness, sound, etc.). (picture attached)
• Colour sync adjustment procedure. (service info for PHILIPS -20GR105267B)
• Dim picture with Hanover bars visible. (with circuit diagram extract)
• Does not start up at once from cold.
• No line output.
• Distorted audio.
• Buzz in audio (intermittently). (extract of circuit diagram attached)
• Limited volume. No channel search.
• No +9V, line output stage is OK. (with circuit diagram extract)
• 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 attached)
• Display goes to F1 a few seconds after switching the set on.
• No start-up. Buzzing from speakers and working noise of PSU.
• Unable to tune or set volume in Prefix mode.
• Programme tuning difficulty, stations shifted on tuning bar. (+ extract of circuit diagram)
• Green screen and at other times no tuning. (+ extract of circuit diagram)
• How to de-activate Hotel-Mode:
• Sound varies with picture content.
• The following production changes were introduced to prevent the set coming on in the store lock mode when switched on from standby. (extract of circuit diagram attached)
• Difficult to tune programmes, stations shifted on tuning bar.
• Picture only in two bars in upper screen section, the rest is dark. (picture attached)
• The fuse and the bridge diodes in the power supply blow.
• Whistle.
• Lines across top of picture about 8" in first 100 lines. (+ extract of circuit diagram)
• How to switch off Hotel-Mode:
• No picture. Audio OK .
• Sound returns gradually after channel change. (picture attached)
• No voltage from PSU. (picture attached)
• Crackling and popping in sound after a short time.
• Slow start-up.
• Colour disappears with VCR-scan (picture search). (+ extract of circuit diagram)
• +9V supply modification. (with circuit diagram extract)
• No picture (when cold).
• Low 5V to micro chip. (extract of circuit diagram attached)
• Whistling.
• PSU check.
• No horizontal synchronisation. (with circuit diagram extract)
• Field collapse normally with blank picture. (picture attached)
• Programs and PP-settings cannot be changed.
• No regulation. (picture attached)
• Stuck in hotel mode.
• Appliance can not be programmed. Search does not function. Only limited volume control.
• Error messages indicated by front display flashing. (+ extract of circuit diagram)
• Low audio. (picture attached)
• Picture displays lines and strange foldover effect at centre.
• Description of SMPS. (extract of circuit diagram attached)
• Enable Hotel mode. Disable hotel mode.
• Horizontal white line.
• No HV.
• Identification coil adjustment.
• Line tearing, especially with bright scences. (extract of circuit diagram attached)
• Line output stage TS7528 is defective. (+ extract of circuit diagram)
• No start up from cold and humming.
• Initial volume level is higher than maximum Hotel mode setting.
• Does not shut down (when cold).
• No audio.
• Poor reproduction of copy protected tapes. (+ extract of circuit diagram)
• Unregulated power supply. Pulsating picture and surging sound. (part of circuit diagram displayed) (20GR105267B PHILIPS repair tip)
• Initial volume level is higher than maximum hotel mode setting. (PHILIPS - 20GR105267B information)
• To put into hotel mode.
• LED flashes once, then gurgles. (with circuit diagram extract)
• To remove store/lock.
• No connection for headphone.
• Slow start up of power supply. (part of circuit diagram displayed)
• No tuning. (picture attached)
• Stored channels drift off tune briefly after switch on. Crackle in sound.
• Colours flicker and disappears.
• No picture. No sound. Switching on and off from Standby OK. (PHILIPS - 20GR105267B information)
• Buzzing sound then switches off.
• Chopper inoperative. (part of circuit diagram displayed)
• No start-up. when cold. (with circuit diagram extract)
• Reduced vertical size. at top.
• 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.
• Will not tune, drifts, colour disappears or interference on a certain channel. (e.g. channel 5 and 59)
• Colour flickers. No colour. after a while. (part of circuit diagram displayed)
• Picture is poor with rippling on verticals. (part of circuit diagram displayed)
• Hums softly. (+ extract of circuit diagram)
• No tuning bar when install button pressed and set not in hotel mode. (part of circuit diagram displayed)
• Intermittently dead. (extract of circuit diagram attached)
• Cannot be programmed and search does not function. Only limited volume adjustable.
• Tuning drifts. (+ extract of circuit diagram)
• Blank or green raster. Flyback lines. Faint picture or normal picture. (with circuit diagram extract)
• CRT types.
• No tuning possible, F2 appears on bottom of picture and S1 on top.
• High voltage transistor defective after a while.
• Green picture. (picture attached)
• How to de-activate Hotel-Mode.
• No tuning - no channels.
• How to switch off Hotel-Mode.
• No switch on after activating mains switch. Whistling noise. (+ extract of circuit diagram)
• Drive for high voltage missing. (extract of circuit diagram attached) (20GR105267B PHILIPS repair tip)
• Intermittently no picture and sound at switch on. Buzz from speaker. (+ extract of circuit diagram)
• No picture or sound but RCU works correctly. LED flashes when the handset is tried. (with circuit diagram extract)
• Picture is mostly green with flyback lines after 10 secs from switch on.
• Reduced horizontal size. (part of circuit diagram displayed)
• No function. Standby-LED lights up. Appliance switches on but no picture or sound. (20GR105267B tips)
• Connection of a loop system to the TV. (20GR105267B tips)
• Only half a picture. (picture attached)
• Green raster. Faint picture. Flyback lines.
• Sound increases intermittently or "pops", especially during bright scenes. (picture attached)
• No colour.
• Change of C2523.
• Low frequency noise on sound.
• No picture. (picture attached) (PHILIPS - 20GR105267B information)
• Vertical oscillator adjustment procedure.
• White screen with flyback lines. Excessive brightness which increases until PSU switches to protection mode. (with circuit diagram extract)
• Intermittent audio and picture. (+ extract of circuit diagram)
• Intermittently dead. after start-up.
• Power supply fault finding. (+ extract of circuit diagram)
• Change of C2523.
• Tuning menu can not be called. All other functions OK.
• Bright flash on screen and no picture or sound after a few minutes. (with circuit diagram extract)
• Line out of phase. Black band in centre of screen. No colour.
• Poor sound, cannot be adjusted louder. When adjusting, sound cuts out. (with circuit diagram extract)
• Dead with whistling noise coming from power supply. (+ extract of circuit diagram)
• Stuck in standby. (+ extract of circuit diagram)
• Squealing from PSU.
• Red picture. Flyback lines.
• Colour amplitude and phase adjustment procedure.
• Memory cannot be opened via "rhombus". Stored channels cannot be changed.
• Reluctant to start from cold (picture attached)
• Sound motorboating when cold. (+ extract of circuit diagram)
• No colour. (part of circuit diagram displayed)
• No tuning or on screen tuning display.
• LED does not flash. Slight buzz in appliance. (extract of circuit diagram attached)
• Blue picture. Coloured lines.
• How to reset microprocessor.
• No HT from chopper circuit. (picture attached)
• How to de-activate volume limiter.