20GR105059R / PHILIPS [TV]

• No function, starts up from standby, then goes out.
• Colour sync adjustment procedure.
• No line start up; +95 available; +9V is about 4.5V. (picture attached) (PHILIPS - 20GR105059R information)
• No tuning. (with circuit diagram extract) (PHILIPS - 20GR105059R information)
• No functions. when cold.
• Standby just pulsing.
• How to de-activate volume limiter.
• Intermittent colour and intermittent dark vertical bar on 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. (with circuit diagram extract)
• Tripping. (part of circuit diagram displayed)
• Change of C2523.
• Volume goes to max. No volume control.
• Picture shifted horizontally. (+ extract of circuit diagram)
• Identification coil adjustment.
• No SOP supply. (with circuit diagram extract) (service info for PHILIPS -20GR105059R)
• Change of C2523.
• LED switches on then off immediately.
• Unstable tuning.
• No operation.
• Vertical amplitude cannot be fully adjusted, TXT lines can be seen. (picture attached)
• Intermittent channel drift in UHF. Channel search OK. VHF OK.
• Picture is poor with rippling on verticals. (extract of circuit diagram attached)
• Skips channels during tuning. only on certain channels.
• Delay RF AGC adjustment procedure. (PHILIPS - 20GR105059R information)
• No start up. No standby. Attempts to start up, but fails.
• Dead due to action of over voltage protection circuit.
• Slight foldover at upper part of picture if appliance is switched on when cold. Fault disappears after few minutes. (with circuit diagram extract)
• Unable to retune set or set analogue levels. Store-lock option may be on "Hotel mode".
• Will not tune, drifts, colour disappears or interference on a certain channel. (e.g. channel 5 and 59)
• Processor numbers (changed).
• No vertical deflection. (picture attached)
• Appliance does not function with standby light flashing.
• New IR receiver.
• No sound or picture. Low hum from speaker. (+ extract of circuit diagram)
• No audio.
• Buzzing sound then switches off.
• 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. (20GR105059R PHILIPS repair tip)
• Intermittently dead. after start-up.
• Sometimes when turned on, green screen only with flyback lines, at other times no tuning and channel will not change. (picture attached)
• Switches to standby. (picture attached)
• No connection for headphone.
• Line output transistor becomes warm and in the course of time it becomes defective. (with circuit diagram extract)
• New infra red receiver.
• SOPS defective. (with circuit diagram extract)
• White unmodulated raster. Picture missing. (+ extract of circuit diagram)
• Initial volume level is higher than maximum Hotel mode setting.
• No function. Motorboating from PSU. TV starts up randomly. Intermittent fault. (20GR105059R tips)
• Sound returns gradually after channel change. (part of circuit diagram displayed)
• Green screen and at other times no tuning. (part of circuit diagram displayed)
• Dead. Only standby-LED works. Responds to TURN ON command, but no image and no sound.
• Slow start-up.
• No picture. No sound. Switching on and off from Standby OK.
• Right side of picture discoloured.
• During picture changes sometimes a volume increase (plop) is heard. (+ extract of circuit diagram) (20GR105059R tip from PHILIPS)
• No switch on. Weak whistling noise from PSU. LED is OFF.
• Tuning drift, when it is hot the tuning is lost on channel change.
• Quick hiccup. (+ extract of circuit diagram)
• Line tearing. on lower half screen. (picture attached)
• No line output stage. (extract of circuit diagram attached)
• Occasionally appliance does not switch on from standby. No further functions are possible.
• Bright flash on screen. No picture or sound. (part of circuit diagram displayed)
• No functions. Slow start-up. (picture attached)
• Sound varies with picture content.
• Appliance hums slightly (no speaker) horizontal end stage and power supply transistor are ok. Unfortunately no service instructions available.
• The TV does not stop during the tuning phase.
• Tuning menu can not be called. All other functions OK.
• Colour flickers. No colour. after a while. (+ extract of circuit diagram)
• No OSD. Picture OK .
• Buzzing from PSU. when cold. (picture attached)
• Blank raster. OSD OK .
• Colour amplitude and phase adjustment procedure.
• Lines across top of picture about 8" in first 100 lines. (picture attached)
• Horizontal hold adjustment procedure.
• Sound motorboating when cold. (part of circuit diagram displayed) (20GR105059R tip from PHILIPS)
• Dead. Strange noises from PSU/ line output transformer. (extract of circuit diagram attached)
• Memory loss. (part of circuit diagram displayed)
• Dead set. Tries to start.
• Unable to tune or set volume in Prefix mode. (20GR105059R PHILIPS repair tip)
• Strongly distorted sound by low volume.
• Print with linearity coil pos. 5800.
• No or intermittent start-up. (with circuit diagram extract)
• Picture separating line appears. Whistling.
• Intermittent colour.
• Line output transistor TR7528 fails at switch on.
• How to switch off Hotel-Mode:
• Horizontal oscillator adjustment procedure.
• Intermittent audio and picture. (+ extract of circuit diagram)
• Colours flickers and disappears.
• No function. Standby-LED lights up. Appliance switches on but no picture or sound.
• No tuning. Impossible to change analog control adjustments (brightness, sound, etc.). (with circuit diagram extract)
• No picture or sound but RCU works correctly. LED flashes when the handset is tried. (with circuit diagram extract)
• V-centre adjustment procedure.
• Service manual correction. (extract of circuit diagram attached)
• Vertical roll. (+ extract of circuit diagram)
• "Store" key does not work. (part of circuit diagram displayed)
• The removal of leaded diodes. (extract of circuit diagram attached)
• Programming unoperational. Limited sound adjustment possible. (20GR105059R tips)
• How to de-activate Hotel-Mode: (20GR105059R tip from PHILIPS)
• CRT types.
• Line tearing, especially with bright scences. (picture attached)
• Dead. Low level buzz from loudspeaker. (picture attached) (service info for PHILIPS -20GR105059R)
• No frame or short frame. (with circuit diagram extract)
• Line output stage TS7528 is defective. (with circuit diagram extract)
• Dead. Low frequency noise on sound.
• Whistle.
• How to enter/exit HOTEL mode.
• Hazy flickering picture at top. (+ extract of circuit diagram)
• How to de-activate Hotel mode.
• Hotel mode.
• No colour in OSD.
• Does not shut down (when cold).
• Green picture.
• Excessive vertical size.
• Set won't tune to high frequency channels and lower frequency channels appear to be higher. (with circuit diagram extract)
• No audio.
• Vertical size varies. intermittently.
• Squealing from PSU.
• Turns on automatically. No RC or front panel controls.
• No freeze frame or intermittent freeze frame; no sound. (+ extract of circuit diagram)
• Modification introduced to +9V supply.
• No +9V, line output stage is OK. (+ extract of circuit diagram)
• After working normally for a while the TV blocks in any position. The functions do not work.
• Colour disappears with VCR-scan (picture search). (picture attached)
• Low audio.
• Standby LED lights up and switches off at power on. Appliance will not start up.
• No picture. No sound. Purring sound in loudspeaker. (part of circuit diagram displayed)
• To release hotel mode (child lock).
• Picture shifted to the left. intermittently. Line tearing. intermittently. (with circuit diagram extract)
• PSU switches off with load at U95V. (+ extract of circuit diagram)
• No function at switch on from standby. Switches to LOCK (hotel) mode. (with circuit diagram extract)
• Intermittently no picture and sound at switch on. Buzz from speaker. (picture attached)
• Microcomputers and screening plate.
• Blank or green raster. Flyback lines. Faint picture or normal picture. (picture attached)
• 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)
• No switch on after activating mains switch. Whistling noise. (+ extract of circuit diagram) (20GR105059R tips)
• PAL colour amplitude adjustment procedure.
• Green raster. Faint picture. Flyback lines.
• Poor synchronisation. (part of circuit diagram displayed)
• Switches off by itself. after a while. (with circuit diagram extract)
• Set comes on in store lock mode. (picture attached)
• Dead. (+ extract of circuit diagram)
• Bright flash on screen and no picture or sound after a few minutes. (with circuit diagram extract)
• No tuning bar when install button pressed and set not in hotel mode. (picture attached)
• Dim picture with Hanover bars visible. (with circuit diagram extract)
• No functions. after start-up (intermittently).
• Does not switch on. LED is lit in standby. If appliance is switched on with RC, LED switches off.
• Intermittently narrow picture, but corrects itself shortly after.
• Hotel Mode activates by itself. (picture attached)
• To improve performance with prerecorded cassettes. (part of circuit diagram displayed) (PHILIPS - 20GR105059R information)
• Drive for high voltage missing. (part of circuit diagram displayed)
• Poor reproduction of copy protected tapes. (part of circuit diagram displayed) (service info for PHILIPS -20GR105059R)
• Search jumps on UHF.
• Red picture. Flyback lines.
• Becomes defective immediately after switch on.
• No HT from chopper circuit. (picture attached)
• Only some programs with snowy picture can be tuned and on band 1 missing some programs. (with circuit diagram extract)
• Spurious nonsense OSG. Goes to standby after 0.5-2hrs. Loss of tuning.
• Loosing colour during play-back of a video tape. (with circuit diagram extract)
• Dark picture.
• Whistling from PSU. (extract of circuit diagram attached) (20GR105059R tips)
• Line chirps intermittently. Appliance does not start. Only hum from loudspeakers.
• Intermittent destruction of line o/p transistor. (+ extract of circuit diagram)
• Dead. Only hum from speakers. (+ extract of circuit diagram) (PHILIPS - 20GR105059R information)
• Stops working every 2 or 3 hrs. Only starts again after switching off and on again. (service info for PHILIPS -20GR105059R)
• Reduced horizontal size. (extract of circuit diagram attached)
• Does not stop on stations.
• Sound varies with picture content. (20GR105059R PHILIPS repair tip)
• Buzzing.
• Sound increases intermittently or "pops", especially during bright scenes. (extract of circuit diagram attached)
• No sound. No picture. Faint motorboating noise.
• Local controls inoperative.
• No power supply start up in loaded condition (eg. with lamp).
• How to switch off Hotel-Mode.
• PSU does not start up, if appliance was switched off for a day. Appliance functions after short switch on/off. (part of circuit diagram displayed)
• White screen with flyback lines. Excessive brightness which increases until PSU switches to protection mode. (extract of circuit diagram attached) (20GR105059R tip from PHILIPS)
• No colour.
• 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.
• Menu rolling. (extract of circuit diagram attached)
• No power with abnormal sound. (with circuit diagram extract)
• 6613 type change. (+ extract of circuit diagram)
• Initial volume level is higher than maximum Hotel mode setting.
• No transmitters to adjust and the sound is not controllable.
• No start-up. Buzzing from speakers and working noise of PSU.
• Horizontal white line.
• No switch on. Low noise on sound. (extract of circuit diagram attached)
• Distorted audio.
• Picture only in two bars in upper screen section, the rest is dark. (extract of circuit diagram attached)
• Difficult to tune programmes, stations shifted on tuning bar.
• Unstable tuning.
• Connection of a loop system to the TV.
• White balance adjustment.
• Lines on picture after approx one hour. It consists of a band of bright white lines about two inches wide. (picture attached) (20GR105059R tips)
• Green screen with flyback line. No picture. OSD OK.
• Volume varies. depending on picture content. (picture attached)
• No voltage from PSU, computer does not work. (extract of circuit diagram attached)
• Volume can't be tuned down. No tuning with RC. (picture attached)
• +B very high. (+ extract of circuit diagram)
• Store lock on the appliance.
• To remove store/lock.
• Sound varies with picture content.
• No audio.
• Bell filter adjustment procedure.
• Initial volume level is higher than maximum Hotel mode setting.
• Blank raster. Flyback lines. (picture attached)
• Frame has shifted sideways. Appliance whistles and does not oscillate correctly. (extract of circuit diagram attached)
• Doesn't store stations correctly.
• Green picture. (with circuit diagram extract)
• Set does not retune or program etc (20GR105059R PHILIPS repair tip)
• No start-up. Standby LED flashes .
• No standby, humming and standby LED blinks.
• LED does not flash. Slight buzz in appliance. (part of circuit diagram displayed)
• No picture. Audio OK .
• Line output stage only starts up for a short time. (extract of circuit diagram attached)
• Control panel cover.
• Enable Hotel mode.
• Sound varies with picture content.
• Does not regulate +95V. (service info for PHILIPS -20GR105059R)
• Line output transistor replacement.
• Random breakdown of line output transistor. (extract of circuit diagram attached)
• Adjustment of +95V. (with circuit diagram extract)
• Defective IC7103 SV-production. (extract of circuit diagram attached) (service info for PHILIPS -20GR105059R)
• PSU peeps +95 is ca 0,8v
• No function. Standby LED flashes briefly. (part of circuit diagram displayed)
• Line transistor 7528 blows within 1 sec. (part of circuit diagram displayed)
• No start-up. when cold. (extract of circuit diagram attached)
• Buzz in audio (intermittently). (extract of circuit diagram attached) (20GR105059R tip from PHILIPS)
• Protection device (thyristor THY6641) is triggered at switch on. (part of circuit diagram displayed)
• Volume change with great fluctuations in brightness. (part of circuit diagram displayed)
• Smeary, washed out picture with bent verticals. (extract of circuit diagram attached)
• Whistling.
• Only half a picture. (with circuit diagram extract)
• The fuse and the bridge diodes in the power supply blow.
• Tuning drifts. only on certain channels (after a while).
• Line output transistor running hot. (picture attached)
• Dead, very slight whistle from PSU.
• Unstable tuning.
• Intermittent green picture, channels cannot be programmed. (+ extract of circuit diagram)
• Trips. (part of circuit diagram displayed)
• No tuning. only on certain channels.
• Picture is mostly green with flyback lines after 10 secs from switch on.
• Initial volume level is higher than maximum hotel mode setting.
• Won't tune a new channel. Won't activate store function. Picture OK. Sound OK.
• Blue picture. Coloured lines.
• Bright picture. Flyback lines.
• Noise in audio. (PHILIPS - 20GR105059R information)
• Green picture with retrace lines. After a few restarts picture OK.
• How to de-activate Hotel-Mode.
• No functions. Hum in loudspeaker. No LED lit.
• Green picture after few hours, intermittently fault disappears for short while when switching from a station to another. Strange characters in OSD.
• 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 picture and sound. Low hum intermittently, no function.
• Hums softly. (picture attached)
• Unstable tuning.
• Stuck in hotel mode.
• Error messages indicated by front display flashing. (picture attached)
• Appliance will not switch on at times, but hums in the power supply section.
• Intermittent colour.
• No picture. No audio. (part of circuit diagram displayed)
• Stored channels are partially lost. (PHILIPS - 20GR105059R information)
• Limited volume. No channel search.
• No picture (when cold).
• Comes on in standby. When program button pressed standby lamp blinks then goes off.
• Skips channels during tuning. (with circuit diagram extract)
• Microprocessor screening plate. (extract of circuit diagram attached)
• Unregulated power supply. Pulsating picture and surging sound. (+ extract of circuit diagram)
• Change of C2523.
• No tuning possible, F2 appears on bottom of picture and S1 on top.
• To put into hotel mode.
• Blank raster. No audio. after a while. (with circuit diagram extract)
• Very slight vertical foldover with interferences similar to EHT arcing, especially on very white scenes.
• Replacing the EAROM. (part of circuit diagram displayed)
• No functions. Sound buzzes in loudspeaker. (part of circuit diagram displayed)
• SIF DET adjustment procedure.
• PSU check. (service info for PHILIPS -20GR105059R)
• Change of C2523.
• Power supply does not oscillate. (picture attached)
• Excessive horizontal size.
• Intermittent colour.
• No channel search. No OSD. (extract of circuit diagram attached)
• Vertical oscillator adjustment procedure.
• Sound goes to max. intermittently and HT varies. (extract of circuit diagram attached)
• Settings do not stay in position.
• Streaks in picture. Picture pulls and rolls intermittently.
• How to switch OFF Hotel-Mode.
• No colour and vertical black bar across screen.
• No picture. TXT OK . (with circuit diagram extract)
• Loud chriping after switch on. It becomes lower after a short time.
• The switched-mode power supply cannot be loaded.
• No tuning. No channel lock. (extract of circuit diagram attached)
• Memory cannot be opened via "rhombus". Stored channels cannot be changed.
• Stuck in standby. (picture attached)
• Display goes to F1 a few seconds after switching the set on.
• Field foldover at switch on from cold. Effect disappears when appliance warms up. (extract of circuit diagram attached)
• No audio.
• Reluctant to start up from cold.
• Right hand side of screen has a line.
• No sound. Picture OK. After a short time TV stops. High frequency noise from PSU. (picture attached)
• Modification at line transformer position 5530. (with circuit diagram extract)
• Difficultly in tuning to correct position.
• Searches for channels continuously. (picture attached)
• Vertical vibration in cold condition of set.
• Automatic fine tuning (AFT) field alignment procedure.
• Line output transistor fails repeatedly. (with circuit diagram extract)
• No HV.
• No line output.
• Appliance is dead with standby LED flashing after a few seconds. (+ extract of circuit diagram)
• Appliance can not be programmed. Search does not function. Only limited volume control.
• Excessive brightness.
• Production change to line drive. (with circuit diagram extract)
• Wavy picture. on the right. (service info for PHILIPS -20GR105059R)
• LED flashes once, then gurgles. (with circuit diagram extract)
• Poor synchronisation. when cold. (+ extract of circuit diagram)
• Dim picture with Hanover bars.
• Change of C2523.
• Programs and PP-settings cannot be changed.
• Green picture. after warm-up. Lines in picture. after warm-up. Does not change channels.
• Does not start up at once from cold.
• Difficult startup. Rattling sound from line output trafo.
• No sound or raster. The 95V HT supply is present at the line output stage but there is no line drive. (picture attached) (20GR105059R tips)
• Reduced vertical size. at top.
• Reluctant to start from cold (+ extract of circuit diagram)
• Search jumps on UHF.
• No audio.
• Focus adjustment.
• Picture fails for a short time. (with circuit diagram extract)
• Poor sound, cannot be adjusted louder. When adjusting, sound cuts out. (extract of circuit diagram attached)
• Two lines going around. (part of circuit diagram displayed)
• No horizontal synchronisation. (part of circuit diagram displayed)
• Stored channels drift off tune briefly after switch on. Crackle in sound.
• Using a lamp as a load.
• Cannot be programmed and search does not function. Only limited volume adjustable.
• Low audio. (+ extract of circuit diagram)
• Low 5V to micro chip. (picture attached)
• No start up, just a buzzing noise in speakers. (part of circuit diagram displayed)
• No picture. (part of circuit diagram displayed)
• Intermittently dead. (picture attached)
• No colour. (with circuit diagram extract) (PHILIPS - 20GR105059R information)
• Stations won't change. Picture and sound OK. Other functions OK.
• Enable Hotel mode. Disable hotel mode.
• Colours flickers and disappears.
• Fizzling sound from speakers at start-up and intermittently picture jagged.
• Line down middle of screen. (part of circuit diagram displayed)
• Picture is faint with hanover bars. (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. (part of circuit diagram displayed)
• Excessive HV. after a while.
• Does not start up. Light buzz from loudspeaker. Standby LED produces one brief blink.
• 95V available. 9V is only 5.2V. Slight buzzing from loudspeakers.
• After switching on the CTV "EXT...1.2.3..." appears on the screen.
• Set dead with just 5V on the 95V line. Standby LED is on but set won't start. (picture attached)
• Picture passes out in the centre.
• Poor sync. AGC fault.
• Slow hiccup (+ extract of circuit diagram)
• No audio.
• No start-up. intermittently.
• Secondary main power supply OK except +9V at 5.8V
• No colour.
• +9V supply modification. (+ extract of circuit diagram)
• Trips. at start-up (intermittently). (picture attached)
• No function. When switching on with RC, standby LED lights up. (picture attached)
• Dead with whistling noise coming from power supply. (with circuit diagram extract)
• No audio.
• Humming, motor noise and other unusual noises. Normal picture.
• Crackling and popping in sound after a short time.
• Power supply fault finding. (+ extract of circuit diagram)
• Excessive green.
• Enter service mode.
• Set goes accidentally into hotel mode.
• Interference in audio. Interference in picture. (picture attached) (service info for PHILIPS -20GR105059R)
• Failures in the power supply. (part of circuit diagram displayed)
• Chopper inoperative. (extract of circuit diagram attached)
• Does not start. Slight buzzing in loudspeaker.
• The TV cannot hold the picture.
• Height excessive. Defective linearity. Field blanking. (with circuit diagram extract)
• Colours flicker and disappears.
• Dead. Power LED is OFF (ON in standby). Hissing from PSU.
• High voltage transistor defective after a while.
• No picture, sound ok but on turning up A1 control, frame collapse. (+ extract of circuit diagram)
• Picture appears slowly.
• Correction to service manual LOT winding.
• Doesn't tune stations correctly. When cold, crossed lines on low UHF channels. (picture attached)
• Error codes.
• Picture shifts. (part of circuit diagram displayed)
• Dead. Low hum.
• No start-up. (extract of circuit diagram attached)
• R-Y and B-Y discriminator adjustment procedure. (+ extract of circuit diagram)
• Stops at start up. (picture attached)
• Memory content dropout at positions 4 and 5.
• Description of SMPS. (part of circuit diagram displayed)
• Green picture.
• Picture centering has shifted horizontally. No OSD.
• Defective purity.
• No tuning.
• No start-up. intermittently (when cold). (part of circuit diagram displayed)
• Cannot change tuning or stored settings. (part of circuit diagram displayed)
• How to reset microprocessor.
• Initial volume level is higher than maximum Hotel mode setting. (service info for PHILIPS -20GR105059R)
• Tuning procedure.
• Picture displays lines and strange foldover effect at centre.
• No tuning or on screen tuning display.
• Dark picture. Audio OK .
• Control micro processors.
• Search jumps on UHF.
• Tuning drifts. only on certain channels.
• Green screen with flyback lines. Green oscillations. Noise as if HV leaky on picture tube base. (with circuit diagram extract)
• Blown chopper. (picture attached)
• Line output stage does not start up. (part of circuit diagram displayed)
• Low frequency noise on sound.
• Buzz in audio. No picture.
• Picture shifted to the right. (part of circuit diagram displayed)
• No start up from cold and humming.
• No functions, hum in loudspeakers. (extract of circuit diagram attached)
• Dead. At switch on the stand by LED flashes.
• No functions. Standby LED flashes. Relay switches to ON.
• No regulation. (part of circuit diagram displayed)
• Slow start up of power supply. (part of circuit diagram displayed)
• Line out of phase. Black band in centre of screen. No colour.
• Does not switch on, standby LED OK.
• Line tearing and rope effect.
• No picture. OSD OK .
• Replacement of TDA7052 with a TDA7052A.
• Vertical line. on the right half screen. (extract of circuit diagram attached)
• Vertical collapse. (part of circuit diagram displayed)
• No tuning - no channels.
• Replacement of surface mounted diode 6637. (picture attached)
• Programme tuning difficulty. Stations has shifted on tuning bar.
• Field collapse normally with blank picture. (extract of circuit diagram attached)
• Programme tuning difficulty, stations shifted on tuning bar. (extract of circuit diagram attached)
• After replacement of the line output transistor BUT12, picture with trapezoid effect, BUT12 overheats and goes defective again. (with circuit diagram extract)
• No colour.
• Noise in sound. Mute does not function.
• U743 tuner replacement. (with circuit diagram extract)
• No tuning, no remote volume control. (+ extract of circuit diagram) (20GR105059R tips)
• Tuning drifts. (with circuit diagram extract)
• No voltage from PSU. (+ extract of circuit diagram)
• Programme channel search cannot be called up.
• Rolling or jittering picture. (with circuit diagram extract)
• 10V on 95V line. (part of circuit diagram displayed)
• Line output stage does not function.
• The tone (sound) tunes well, but the volume cannot be raised.
• Comes on for a short time. (20GR105059R PHILIPS repair tip)