20GR105575R / PHILIPS [TV]

• Protection device (thyristor THY6641) is triggered at switch on. (part of circuit diagram displayed)
• Sound varies with picture content.
• No picture. Audio OK .
• Line tearing and rope effect.
• Blank raster. No audio. after a while. (+ extract of circuit diagram)
• Hums softly. (+ extract of circuit diagram)
• Green picture.
• Does not start. Slight buzzing in loudspeaker.
• Excessive HV. after a while. (20GR105575R PHILIPS repair tip)
• Bell filter adjustment procedure.
• Picture displays lines and strange foldover effect at centre.
• PSU does not start up, if appliance was switched off for a day. Appliance functions after short switch on/off. (+ extract of circuit diagram)
• Intermittently dead. after start-up.
• Picture is mostly green with flyback lines after 10 secs from switch on.
• Excessive vertical size.
• Lines across top of picture about 8" in first 100 lines. (extract of circuit diagram attached)
• LED does not flash. Slight buzz in appliance. (+ extract of circuit diagram)
• No picture. No audio. (part of circuit diagram displayed)
• Green picture. after warm-up. Lines in picture. after warm-up. Does not change channels.
• Unstable tuning.
• Set won't tune to high frequency channels and lower frequency channels appear to be higher. (+ extract of circuit diagram)
• Memory cannot be opened via "rhombus". Stored channels cannot be changed.
• Line chirps intermittently. Appliance does not start. Only hum from loudspeakers.
• No sound. Picture OK. After a short time TV stops. High frequency noise from PSU. (picture attached)
• Difficult startup. Rattling sound from line output trafo.
• Low frequency noise on sound.
• No frame or short frame. (+ extract of circuit diagram)
• Tuning menu can not be called. All other functions OK.
• Intermittent colour.
• Smeary, washed out picture with bent verticals. (extract of circuit diagram attached)
• Line down middle of screen. (extract of circuit diagram attached)
• Print with linearity coil pos. 5800. (PHILIPS - 20GR105575R information)
• Menu rolling. (+ extract of circuit diagram)
• Strongly distorted sound by low volume.
• Change of C2523.
• No channel search. No OSD. (picture attached)
• No tuning, no remote volume control. (part of circuit diagram displayed) (service info for PHILIPS -20GR105575R)
• Enable Hotel mode.
• Line output stage does not function.
• Unstable tuning.
• How to de-activate Hotel mode.
• 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. (service info for PHILIPS -20GR105575R)
• Poor reproduction of copy protected tapes. (part of circuit diagram displayed)
• Programme tuning difficulty, stations shifted on tuning bar. (extract of circuit diagram attached)
• No connection for headphone.
• Vertical size varies. intermittently.
• CRT types.
• +9V supply modification. (extract of circuit diagram attached)
• Standby just pulsing.
• After working normally for a while the TV blocks in any position. The functions do not work.
• Modification at line transformer position 5530. (part of circuit diagram displayed)
• Sound motorboating when cold. (extract of circuit diagram attached)
• No picture. TXT OK . (with circuit diagram extract)
• Automatic fine tuning (AFT) field alignment procedure.
• PSU check.
• Distorted audio.
• Stuck in standby. (+ extract of circuit diagram)
• Control micro processors.
• Local controls inoperative.
• Poor synchronisation. when cold. (with circuit diagram extract)
• Crackling and popping in sound after a short time.
• Line output stage does not start up. (extract of circuit diagram attached)
• Appliance does not function with standby light flashing.
• No start up, just a buzzing noise in speakers. (extract of circuit diagram attached) (20GR105575R PHILIPS repair tip)
• Enable Hotel mode. Disable hotel mode.
• No or intermittent start-up. (with circuit diagram extract)
• Picture only in two bars in upper screen section, the rest is dark. (picture attached)
• Set dead with just 5V on the 95V line. Standby LED is on but set won't start. (picture attached)
• Volume change with great fluctuations in brightness. (picture attached)
• Buzzing.
• To improve performance with prerecorded cassettes. (picture attached)
• Loosing colour during play-back of a video tape. (picture attached)
• Poor synchronisation. (part of circuit diagram displayed)
• Change of C2523.
• Difficult to tune programmes, stations shifted on tuning bar.
• Does not regulate +95V.
• Field collapse normally with blank picture. (+ extract of circuit diagram) (PHILIPS - 20GR105575R information)
• Memory content dropout at positions 4 and 5.
• Reluctant to start up from cold. (service info for PHILIPS -20GR105575R)
• Does not switch on, standby LED OK.
• 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) (20GR105575R tips)
• Search jumps on UHF.
• LED flashes once, then gurgles. (picture attached)
• Slow start up of power supply. (part of circuit diagram displayed)
• Quick hiccup. (+ extract of circuit diagram)
• Picture appears slowly.
• Change of C2523.
• Comes on in standby. When program button pressed standby lamp blinks then goes off.
• Intermittently narrow picture, but corrects itself shortly after.
• Identification coil adjustment.
• PSU peeps +95 is ca 0,8v
• Dim picture with Hanover bars visible. (with circuit diagram extract)
• No audio.
• Vertical roll. (extract of circuit diagram attached)
• No picture or sound but RCU works correctly. LED flashes when the handset is tried. (part of circuit diagram displayed) (service info for PHILIPS -20GR105575R)
• No colour.
• Production change to line drive. (extract of circuit diagram attached)
• 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.
• No functions. Slow start-up. (part of circuit diagram displayed)
• No functions. after start-up (intermittently). (20GR105575R PHILIPS repair tip)
• No colour.
• How to switch off Hotel-Mode:
• Hotel mode.
• Skips channels during tuning. (+ extract of circuit diagram)
• PAL colour amplitude adjustment procedure.
• No function. Motorboating from PSU. TV starts up randomly. Intermittent fault.
• Poor sync. AGC fault.
• White balance adjustment.
• Sound varies with picture content. (service info for PHILIPS -20GR105575R)
• Blank raster. Flyback lines. (picture attached)
• Change of C2523. (20GR105575R tip from PHILIPS)
• Tuning drifts. only on certain channels.
• Appliance is dead with standby LED flashing after a few seconds. (extract of circuit diagram attached)
• Picture shifts. (with circuit diagram extract)
• No tuning or on screen tuning display.
• Picture fails for a short time. (picture attached)
• Buzzing from PSU. when cold. (picture attached) (service info for PHILIPS -20GR105575R)
• Tuning drift, when it is hot the tuning is lost on channel change.
• No power supply start up in loaded condition (eg. with lamp).
• 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. (PHILIPS - 20GR105575R information)
• Sometimes when turned on, green screen only with flyback lines, at other times no tuning and channel will not change. (extract of circuit diagram attached)
• The fuse and the bridge diodes in the power supply blow.
• Dead, very slight whistle from PSU.
• Dead. Strange noises from PSU/ line output transformer. (part of circuit diagram displayed)
• No start-up. Buzzing from speakers and working noise of PSU.
• Green picture. (+ extract of circuit diagram)
• Dead. (part of circuit diagram displayed)
• Microprocessor screening plate. (with circuit diagram extract)
• Description of SMPS. (part of circuit diagram displayed)
• Cannot be programmed and search does not function. Only limited volume adjustable.
• No power with abnormal sound. (with circuit diagram extract)
• No tuning possible, F2 appears on bottom of picture and S1 on top.
• No horizontal synchronisation. (picture attached)
• Stored channels are partially lost.
• Unregulated power supply. Pulsating picture and surging sound. (picture attached)
• How to switch OFF Hotel-Mode.
• Standby LED lights up and switches off at power on. Appliance will not start up.
• Appliance can not be programmed. Search does not function. Only limited volume control.
• No colour. (picture attached)
• No sound or raster. The 95V HT supply is present at the line output stage but there is no line drive. (picture attached)
• Switches to standby. (extract of circuit diagram attached)
• V-centre adjustment procedure.
• Reluctant to start from cold (with circuit diagram extract)
• No HT from chopper circuit. (part of circuit diagram displayed)
• Focus adjustment.
• No switch on. Low noise on sound. (picture attached)
• Stops at start up. (extract of circuit diagram attached)
• Red picture. Flyback lines. (20GR105575R tip from PHILIPS)
• No start-up. (with circuit diagram extract)
• Squealing from PSU.
• No switch on. Weak whistling noise from PSU. LED is OFF.
• Horizontal oscillator adjustment procedure.
• Becomes defective immediately after switch on.
• Settings do not stay in position.
• Programme channel search cannot be called up.
• Set goes accidentally into hotel mode.
• Picture shifted to the right. (picture attached)
• Picture is faint with hanover bars. (picture attached) (20GR105575R tip from PHILIPS)
• Display goes to F1 a few seconds after switching the set on.
• No function. Standby LED flashes briefly. (part of circuit diagram displayed)
• No start up from cold and humming.
• Loud chriping after switch on. It becomes lower after a short time. (20GR105575R PHILIPS repair tip)
• To put into hotel mode.
• Appliance will not switch on at times, but hums in the power supply section.
• No vertical deflection. (picture attached)
• Sound varies with picture content.
• No functions. when cold.
• Intermittent green picture, channels cannot be programmed. (picture attached)
• Set does not retune or program etc
• Defective IC7103 SV-production. (+ extract of circuit diagram)
• Tuning procedure.
• Vertical oscillator adjustment procedure.
• Processor numbers (changed).
• No function. Standby-LED lights up. Appliance switches on but no picture or sound. (20GR105575R PHILIPS repair tip)
• Does not shut down (when cold).
• New infra red receiver.
• Line tearing. on lower half screen. (part of circuit diagram displayed)
• Line output transistor replacement.
• No function, starts up from standby, then goes out. (20GR105575R PHILIPS repair tip)
• Does not stop on stations.
• No audio. (service info for PHILIPS -20GR105575R)
• Initial volume level is higher than maximum Hotel mode setting.
• Stations won't change. Picture and sound OK. Other functions OK. (20GR105575R tips)
• Vertical collapse. (+ extract of circuit diagram)
• Dead with whistling noise coming from power supply. (picture attached) (service info for PHILIPS -20GR105575R)
• Low audio. (with circuit diagram extract)
• Green picture with retrace lines. After a few restarts picture OK.
• Intermittent audio and picture. (with circuit diagram extract)
• "Store" key does not work. (extract of circuit diagram attached)
• Excessive green.
• Search jumps on UHF.
• Bright picture. Flyback lines. (PHILIPS - 20GR105575R information)
• Streaks in picture. Picture pulls and rolls intermittently.
• No functions. Standby LED flashes. Relay switches to ON.
• No operation.
• Whistle.
• No tuning bar when install button pressed and set not in hotel mode. (with circuit diagram extract)
• Bright flash on screen and no picture or sound after a few minutes. (with circuit diagram extract)
• Wavy picture. on the right.
• No function. When switching on with RC, standby LED lights up. (extract of circuit diagram attached)
• Correction to service manual LOT winding.
• Whistling.
• Dead set. Tries to start.
• No picture. OSD OK . (PHILIPS - 20GR105575R information)
• Random breakdown of line output transistor. (picture attached)
• No tuning. No channel lock. (picture attached)
• Using a lamp as a load.
• SIF DET adjustment procedure.
• Picture separating line appears. Whistling.
• No line output stage. (part of circuit diagram displayed)
• Green screen with flyback line. No picture. OSD OK.
• Field foldover at switch on from cold. Effect disappears when appliance warms up. (picture attached)
• No standby, humming and standby LED blinks.
• No switch on after activating mains switch. Whistling noise. (+ extract of circuit diagram)
• Connection of a loop system to the TV. (PHILIPS - 20GR105575R information)
• R-Y and B-Y discriminator adjustment procedure. (+ extract of circuit diagram)
• Sound returns gradually after channel change. (part of circuit diagram displayed)
• Lines on picture after approx one hour. It consists of a band of bright white lines about two inches wide. (extract of circuit diagram attached)
• Noise in audio.
• No audio. (20GR105575R PHILIPS repair tip)
• No picture. No sound. Switching on and off from Standby OK.
• No voltage from PSU. (part of circuit diagram displayed)
• Difficultly in tuning to correct position.
• Programming unoperational. Limited sound adjustment possible.
• Slow start-up.
• No function at switch on from standby. Switches to LOCK (hotel) mode. (+ extract of circuit diagram)
• Right hand side of screen has a line.
• No start-up. intermittently (when cold). (part of circuit diagram displayed)
• Interference in audio. Interference in picture. (with circuit diagram extract)
• Whistling from PSU. (part of circuit diagram displayed)
• Sound varies with picture content. (20GR105575R tip from PHILIPS)
• Store lock on the appliance.
• Green screen and at other times no tuning. (part of circuit diagram displayed) (20GR105575R tips)
• No freeze frame or intermittent freeze frame; no sound. (part of circuit diagram displayed)
• Delay RF AGC adjustment procedure.
• Appliance hums slightly (no speaker) horizontal end stage and power supply transistor are ok. Unfortunately no service instructions available.
• Blank raster. OSD OK .
• Change of C2523.
• Low 5V to micro chip. (picture attached)
• Intermittent colour.
• Horizontal white line.
• Line output transistor fails repeatedly. (+ extract of circuit diagram)
• Excessive brightness.
• Colours flicker and disappears. (20GR105575R tip from PHILIPS)
• Limited volume. No channel search.
• Fizzling sound from speakers at start-up and intermittently picture jagged.
• No voltage from PSU, computer does not work. (part of circuit diagram displayed)
• No colour.
• No tuning - no channels.
• Dead. Only standby-LED works. Responds to TURN ON command, but no image and no sound.
• Memory loss. (with circuit diagram extract)
• No picture (when cold).
• Hazy flickering picture at top. (part of circuit diagram displayed)
• No picture and sound. Low hum intermittently, no function. (20GR105575R PHILIPS repair tip)
• Bright flash on screen. No picture or sound. (+ extract of circuit diagram)
• After switching on the CTV "EXT...1.2.3..." appears on the screen.
• No start-up. when cold. (picture attached)
• The TV cannot hold the picture. (20GR105575R tips)
• Reduced horizontal size. (picture attached)
• Line output transistor becomes warm and in the course of time it becomes defective. (extract of circuit diagram attached) (PHILIPS - 20GR105575R information)
• No sound. No picture. Faint motorboating noise.
• Dead. Low level buzz from loudspeaker. (with circuit diagram extract)
• No +9V, line output stage is OK. (extract of circuit diagram attached)
• How to de-activate Hotel-Mode:
• Doesn't store stations correctly.
• 95V available. 9V is only 5.2V. Slight buzzing from loudspeakers.
• Humming, motor noise and other unusual noises. Normal picture.
• Searches for channels continuously. (with circuit diagram extract)
• The removal of leaded diodes. (with circuit diagram extract) (service info for PHILIPS -20GR105575R)
• Frame has shifted sideways. Appliance whistles and does not oscillate correctly. (+ extract of circuit diagram)
• Intermittent colour and intermittent dark vertical bar on picture.
• Blue picture. Coloured lines.
• Line out of phase. Black band in centre of screen. No colour.
• No line start up; +95 available; +9V is about 4.5V. (with circuit diagram extract)
• Tripping. (with circuit diagram extract)
• Power supply fault finding. (part of circuit diagram displayed)
• How to switch off Hotel-Mode.
• SOPS defective. (part of circuit diagram displayed)
• Line output transistor TR7528 fails at switch on. (service info for PHILIPS -20GR105575R)
• Skips channels during tuning. only on certain channels.
• Microcomputers and screening plate.
• Blank or green raster. Flyback lines. Faint picture or normal picture. (+ extract of circuit diagram)
• Initial volume level is higher than maximum Hotel mode setting.
• Spurious nonsense OSG. Goes to standby after 0.5-2hrs. Loss of tuning.
• No transmitters to adjust and the sound is not controllable.
• The TV does not stop during the tuning phase.
• Error messages indicated by front display flashing. (part of circuit diagram displayed)
• Buzz in audio. No picture. (service info for PHILIPS -20GR105575R)
• Service manual correction. (picture attached)
• Colour sync adjustment procedure.
• How to reset microprocessor. (PHILIPS - 20GR105575R information)
• Does not switch on. LED is lit in standby. If appliance is switched on with RC, LED switches off.
• Enter service mode.
• Trips. (part of circuit diagram displayed) (20GR105575R tip from PHILIPS)
• After replacement of the line output transistor BUT12, picture with trapezoid effect, BUT12 overheats and goes defective again. (+ extract of circuit diagram)
• Blown chopper. (with circuit diagram extract)
• Sound increases intermittently or "pops", especially during bright scenes. (part of circuit diagram displayed)
• 6613 type change. (with circuit diagram extract) (20GR105575R PHILIPS repair tip)
• Programs and PP-settings cannot be changed.
• Green picture after few hours, intermittently fault disappears for short while when switching from a station to another. Strange characters in OSD.
• Unable to retune set or set analogue levels. Store-lock option may be on "Hotel mode".
• Intermittent colour.
• Green screen with flyback lines. Green oscillations. Noise as if HV leaky on picture tube base. (picture attached)
• Control panel cover.
• No start up. No standby. Attempts to start up, but fails.
• Tuning drifts. only on certain channels (after a while).
• No regulation. (with circuit diagram extract)
• Intermittent destruction of line o/p transistor. (picture attached) (20GR105575R tips)
• U743 tuner replacement. (+ extract of circuit diagram) (PHILIPS - 20GR105575R information)
• White unmodulated raster. Picture missing. (with circuit diagram extract)
• High voltage transistor defective after a while.
• Only half a picture. (with circuit diagram extract)
• Unstable tuning.
• Colour flickers. No colour. after a while. (part of circuit diagram displayed)
• Drive for high voltage missing. (+ extract of circuit diagram)
• 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 functions. Sound buzzes in loudspeaker. (+ extract of circuit diagram)
• Picture shifted to the left. intermittently. Line tearing. intermittently. (+ extract of circuit diagram)
• No start-up. Standby LED flashes .
• Reduced vertical size. at top.
• Colour disappears with VCR-scan (picture search). (with circuit diagram extract)
• How to enter/exit HOTEL mode.
• During picture changes sometimes a volume increase (plop) is heard. (with circuit diagram extract) (PHILIPS - 20GR105575R information)
• Excessive horizontal size.
• Only some programs with snowy picture can be tuned and on band 1 missing some programs. (extract of circuit diagram attached)
• Initial volume level is higher than maximum Hotel mode setting.
• Colour amplitude and phase adjustment procedure.
• No colour in OSD.
• No tuning. Impossible to change analog control adjustments (brightness, sound, etc.). (part of circuit diagram displayed)
• Error codes. (20GR105575R PHILIPS repair tip)
• Rolling or jittering picture. (picture attached)
• Poor sound, cannot be adjusted louder. When adjusting, sound cuts out. (part of circuit diagram displayed)
• Dead. Only hum from speakers. (with circuit diagram extract)
• Replacing the EAROM. (extract of circuit diagram attached) (20GR105575R tips)
• Noise in sound. Mute does not function.
• Adjustment of +95V. (extract of circuit diagram attached)
• Search jumps on UHF.
• Dark picture. Audio OK .
• Defective purity.
• Modification introduced to +9V supply.
• Cannot change tuning or stored settings. (picture attached)
• No line output.
• Two lines going around. (with circuit diagram extract)
• PSU switches off with load at U95V. (part of circuit diagram displayed) (PHILIPS - 20GR105575R information)
• Line output transistor running hot. (+ extract of circuit diagram)
• Green picture.
• Intermittently no picture and sound at switch on. Buzz from speaker. (picture attached) (20GR105575R tip from PHILIPS)
• Horizontal hold adjustment procedure.
• Programme tuning difficulty. Stations has shifted on tuning bar.
• Vertical amplitude cannot be fully adjusted, TXT lines can be seen. (picture attached)
• Turns on automatically. No RC or front panel controls.
• Switches off by itself. after a while. (with circuit diagram extract)
• Stuck in hotel mode.
• Replacement of TDA7052 with a TDA7052A.
• No audio.
• Slow hiccup (extract of circuit diagram attached)
• To remove store/lock.
• No picture, sound ok but on turning up A1 control, frame collapse. (part of circuit diagram displayed)
• Occasionally appliance does not switch on from standby. No further functions are possible. (20GR105575R tips)
• Won't tune a new channel. Won't activate store function. Picture OK. Sound OK.
• No tuning. only on certain channels.
• Stored channels drift off tune briefly after switch on. Crackle in sound.
• Stops working every 2 or 3 hrs. Only starts again after switching off and on again.
• Picture passes out in the centre.
• Buzz in audio (intermittently). (+ extract of circuit diagram)
• Comes on for a short time.
• Green raster. Faint picture. Flyback lines.
• Volume goes to max. No volume control.
• Slight foldover at upper part of picture if appliance is switched on when cold. Fault disappears after few minutes. (+ extract of circuit diagram)
• Dead due to action of over voltage protection circuit.
• Chopper inoperative. (+ extract of circuit diagram)
• The switched-mode power supply cannot be loaded.
• Line output stage only starts up for a short time. (+ extract of circuit diagram)
• No HV.
• Will not tune, drifts, colour disappears or interference on a certain channel. (e.g. channel 5 and 59)
• Intermittent channel drift in UHF. Channel search OK. VHF OK.
• Volume varies. depending on picture content. (+ extract of circuit diagram)
• Dead. Low frequency noise on sound.
• +B very high. (part of circuit diagram displayed)
• Dim picture with Hanover bars.
• No colour and vertical black bar across screen.
• Dead. Low hum.
• Dead. At switch on the stand by LED flashes. (20GR105575R tips)
• Picture is poor with rippling on verticals. (with circuit diagram extract)
• LED switches on then off immediately.
• No sound or picture. Low hum from speaker. (picture attached)
• Vertical vibration in cold condition of set.
• Colours flickers and disappears.
• How to de-activate volume limiter.
• Replacement of surface mounted diode 6637. (extract of circuit diagram attached)
• No tuning. (part of circuit diagram displayed)
• How to de-activate Hotel-Mode.
• Intermittently dead. (with circuit diagram extract)
• Right side of picture discoloured. (20GR105575R PHILIPS repair tip)
• The tone (sound) tunes well, but the volume cannot be raised.
• Unable to tune or set volume in Prefix mode.
• No functions, hum in loudspeakers. (extract of circuit diagram attached) (20GR105575R tip from PHILIPS)
• No functions. Hum in loudspeaker. No LED lit.
• Picture centering has shifted horizontally. No OSD.
• No picture. (with circuit diagram extract)
• Initial volume level is higher than maximum hotel mode setting.
• Line tearing, especially with bright scences. (+ extract of circuit diagram)
• Line output stage TS7528 is defective. (extract of circuit diagram attached)
• Hotel Mode activates by itself. (with circuit diagram extract)
• Tuning drifts. (+ extract of circuit diagram)
• No OSD. Picture OK .
• Unstable tuning.
• Height excessive. Defective linearity. Field blanking. (part of circuit diagram displayed)
• No SOP supply. (+ extract of circuit diagram) (20GR105575R PHILIPS repair tip)
• No picture. No sound. Purring sound in loudspeaker. (picture attached) (20GR105575R PHILIPS repair tip)
• Sound goes to max. intermittently and HT varies. (extract of circuit diagram attached)
• No audio.
• Picture shifted horizontally. (extract of circuit diagram attached)
• Power supply does not oscillate. (with circuit diagram extract)
• Does not start up at once from cold.
• Vertical line. on the right half screen. (picture attached) (20GR105575R tips)
• Does not start up. Light buzz from loudspeaker. Standby LED produces one brief blink.
• To release hotel mode (child lock).
• Secondary main power supply OK except +9V at 5.8V
• White screen with flyback lines. Excessive brightness which increases until PSU switches to protection mode. (+ extract of circuit diagram)
• 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)
• Set comes on in store lock mode. (part of circuit diagram displayed)
• Doesn't tune stations correctly. When cold, crossed lines on low UHF channels. (with circuit diagram extract)
• New IR receiver.
• 10V on 95V line. (picture attached)
• Line transistor 7528 blows within 1 sec. (part of circuit diagram displayed)
• Dark picture.
• Low audio.
• 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)
• Colours flickers and disappears.
• Dead. Power LED is OFF (ON in standby). Hissing from PSU.
• Trips. at start-up (intermittently). (part of circuit diagram displayed)
• Failures in the power supply. (extract of circuit diagram attached)
• No audio.
• Buzzing sound then switches off.
• No start-up. intermittently.
• No tuning.
• No audio.
• Volume can't be tuned down. No tuning with RC. (part of circuit diagram displayed)