M72315REFERENCE / OTTOVERSAND [TV]

• Screen grid voltage adjustment. (M72315REFERENCE OTTOVERSAND repair tip)
• LF end stage IC TDA2052H destroyed due to static discharge in the appliance.
• Failure of the RGB-output stage ICs. (part of circuit diagram displayed)
• No functions. PSU pulsates. Standby LED lit .
• Switches suddenly to standby. Then cannot be switched on via RC. (OTTOVERSAND - M72315REFERENCE information)
• Enter service mode.
• Setting +A, +B, +N and +F voltage. (picture attached)
• No colour. (+ extract of circuit diagram)
• Switches off after some time. Standby display available. (+ extract of circuit diagram)
• Picture twitches (intermittently).
• Audible rattle that doesn't 't come from the speaker.
• Flash from the tube. (extract of circuit diagram attached)
• Ticking noise. (extract of circuit diagram attached)
• Setting the line frequency: PIP-colour/RGB.
• No functions. after start-up.
• Audible buzzing noises, which do not come from the speaker.
• Switches to standby (after a few seconds).
• PSU becomes defective during operation. (picture attached)
• Bright picture. Switches off by itself. (extract of circuit diagram attached)
• Disable child lock.
• Missing colour or flag waving picture. (picture attached)
• Cycles on/off.
• E/W fault.
• Vertical collapse. (part of circuit diagram displayed)
• Intermittently interference lines in picture until total failure of Y signal. (+ extract of circuit diagram)
• Horizontal stripes.
• Problem going into black and white.
• Greenish picture with flyback lines. Switches to standby after a short time and can not be switched on again. (extract of circuit diagram attached)
• No start-up from standby. (M72315REFERENCE OTTOVERSAND repair tip)
• No colour. after a while.
• Grey screen. Audio and OSD OK . (with circuit diagram extract)
• Horizontal colourful lines, that become wider in time and become vertical. Picture content present. (+ extract of circuit diagram)
• Adjusting the tuner AGC.
• Weak colours. (M72315REFERENCE OTTOVERSAND repair tip)
• Blurry picture (after a few seconds).
• Red colour distortion. (with circuit diagram extract) (OTTOVERSAND - M72315REFERENCE information)
• Buzzing from loudspeaker.
• No start-up. LED lit. .
• Excessive horizontal size.
• Horizontal size varies. Crackling audio.
• PSU switching transistor T611 (IRF PC50) fails. (+ extract of circuit diagram)
• "Seagull wing" distortion. Vertical linearity fault in top and bottom part of picture with Philips Megatron picture tubes. (part of circuit diagram displayed) (OTTOVERSAND - M72315REFERENCE information)
• Adjusting the picture definition. (M72315REFERENCE tips)
• Shuts down (after start-up).
• White dots after approx. 2 mins.
• Switches to standby. (with circuit diagram extract)
• Service info: Treatment/cleaning of anthracite coloured housing.
• Appliance cracks and then no sound.
• Loud crack in the loudspeakers at switch on/off.
• Demo mode runs at start-up, then switches to standby. No RC control.
• Varying geometry, picture is bigger via tuner reception than with SCART connection. (OTTOVERSAND - M72315REFERENCE information)
• Picture is partly red in colour. Streaking.
• Switches to protection mode. intermittently. (with circuit diagram extract)
• Ripples in the picture.
• Adjusting the speed modulation.
• Intermittent hung up or switching into standby of processor.
• Switches to standby. after start-up.
• Purple stripes in picture after switch on. OSD, TXT OK.
• Strong streaking in picture briefly after switch on. (+ extract of circuit diagram)
• Picture only visible in outline. (part of circuit diagram displayed)
• Switches to standby or processor blocks.
• Bright picture. Audio OK . (+ extract of circuit diagram)
• Linearity fault at upper and lower picture edge.
• One primary colour missing on one line out of two.
• Audible buzzing noises, which do not come from the speaker.
• Dead. (picture attached) (M72315REFERENCE tips)
• High voltage appears for a short time then switches off. Fault may occur after a longer time as well. After switch off, appliance can not be switched on from standby via RC. (extract of circuit diagram attached)
• Chroma (SECAM): PIP colour/RGB.
• How to remove mains switch. (M72315REFERENCE OTTOVERSAND repair tip)
• Faulty characters/segments on display. in TXT.
• Blurry picture. (M72315REFERENCE tip from OTTOVERSAND)
• Adjusting the text RGB level.
• Crystallized picture.
• Irregular crackling in the sound. Sound fails. Picture width and E/W twitch. Snow in the picture. No more RC. Display then switches off. (picture attached)
• How to display EPROM version number.
• Line output transistor fails repeatedly. (+ extract of circuit diagram)
• PSU pulsates. (picture attached)
• Starts, gets bright for a short time and then switches off.
• Setting the picture tube type.
• Picture width and E/W twitch. Snow in picture. No RC. Then display switches off. Irregular sizzling in the sound. Sound fails. (with circuit diagram extract)
• One colour missing. Intermittently red/blue/or green streaking.
• A tweeter (treble loudspeaker) is defective and protection circuit of LF power stages is triggered.
• Wrong colours. TXT OK.
• No raster.
• Stuck in standby.
• No sound. Only a slight crackling noise after switch-on. (M72315REFERENCE OTTOVERSAND repair tip)
• Moire in picture at switch on. Picture OK after warming up.
• Switches to protection mode. (part of circuit diagram displayed)
• Adjusting the colour coverage.
• Picture is unfocused and mainly in the N-S direction. (M72315REFERENCE tips)
• 30cm ring on screen at switch off. Also more dust particles tend to cling there.
• Bright picture. TXT OK . (picture attached)
• Poor focus.
• Bright picture with snow. Cannot be controlled.
• Red stripes in picture.
• Shuts down.
• No colour during S-VHS playback via the 4 pin socket (on appliances which are equipped with a scart socket 29305-160.05 or .06).
• Setting the Bottom Flutter Gate.
• Short, horizontal lines in picture. (with circuit diagram extract)
• Switches intermittently to standby. Starts up again by itself after a few secs. PSU pulsates during standby time.
• Picture very dark, OSD also dark, turning up UG2 does not help.
• Interference hum noise during PB via the headphones.
• Horizontal white line. at top. Audio OK .
• Picture vertically compressed on top.
• No red. TXT OK .
• Shuts down after a few secs. (protective switching). Horizontal line in the lower half of picture after removing E/W assembly.
• Red, green or blue picture with streaking.
• Dark screen, only one small bright line in the corner above.
• Only dark picture, moving outlines and it bceomes gradually brighter but more green when it has been switched off and on again after a few minutes. FLuctuates from green to normal. Picture normal after start up when cold.
• Thin flashing stripes on screen, also in menu and TXT.
• Control intermittently blocked. LED goes off after switch on.
• Intermittent problems. (extract of circuit diagram attached)
• Cleaning and handling the Megatron picture tubes. (M72315REFERENCE OTTOVERSAND repair tip)
• Snow in picture. No RC. Then display switches off. Irregular sizzling in audio. Audio fails. Picture width and E/W twitch. (with circuit diagram extract)
• Model release/pricing information.
• High voltage builds up briefly, then standby.
• Failure of vertical IC TDA4173 (IC410). (+ extract of circuit diagram)
• No brightness. OSD and TXT OK . (service info for OTTOVERSAND -M72315REFERENCE)
• No blue (intermittently).
• Bright picture. Flyback lines. Switches off by itself. after a while. (with circuit diagram extract)
• No picture via tuner and AV inputs. Bright screen. Brightness and contrast adjustment OK. Audio OK.
• The 'Answer key' of the TXT of the Digi 5 sets has a defective function. (No function in SAT 1 TXT).
• Tweeter loudspeaker fails.
• Intermittently no sound during OSD display.
• Red stripes when cold. (OTTOVERSAND - M72315REFERENCE information)
• No audio. No picture. No display. (extract of circuit diagram attached)
• Picture slightly out of focus. Focus control at right end position.
• White lines appear intermittently, not regularly and persistent ticking is audible in loudspeaker.
• Shift of luminance/chroma at start up.
• Reduced horizontal size. E/W fault. (picture attached)
• Afterglow at switch off. (picture attached)
• Protective circuit for RGB output stage ICs (TDA6111).
• Intense coloured noise bars in picture.
• Picture is green. With high contrast, picture outlines (mainly white) are strongly indented with green.
• Moire in picture. Symptom also by picture via scart.
• No function of RESPONSE key at SAT 1 TXT.
• Flyback lines. (with circuit diagram extract)
• Colour drop out or stripes. Occurs after warming up in AV- and RGB mode. (M72315REFERENCE tip from OTTOVERSAND)
• T572 fails repeatedly. (picture attached) (M72315REFERENCE OTTOVERSAND repair tip)
• Adjusting chroma (NTSC): PIP colour /RGB.
• Dead, only red LED lights. Loud cracking from loud speakers on switch off. Sometimes display lights shortly up after start-up. (+ extract of circuit diagram)
• Model release/pricing information.
• Horizontal collapse. (picture attached) (M72315REFERENCE tip from OTTOVERSAND)
• Chroma (PAL) adjustment: PIP colour/RGB.
• Hum in audio. in PB (via headphones).
• After turning on voltage built up, then appliance turns itself off again.
• No start-up (when cold).
• Dark screen. (extract of circuit diagram attached)
• Dark screen. White line. at top. No OSD. No TXT. Audio OK .
• Vertical foldover. at bottom. (picture attached)
• Bright screen, then vertical line. Appliance turns itself off. (part of circuit diagram displayed)
• Picture and sound interference. Stripes in picturen in intervals of 1 sec. and colour suspends. Sound hissing.
• No start-up from standby with RC. (picture attached)
• No picture. No sound or it can not be controlled.
• No vertical deflection. (service info for OTTOVERSAND -M72315REFERENCE)
• No start-up. intermittently.
• Picture is zoomed. No sharpness adjustment.
• Adjusting the bridge coil. (part of circuit diagram displayed)
• No red.
• Vertical jitter. (picture attached)
• HV appears briefly after switch on, then all voltages present.
• Sound dropout. Only bubbling sound when operating volume button. (with circuit diagram extract) (M72315REFERENCE OTTOVERSAND repair tip)
• No HV. Comes on for a short time.
• Bangs, flashes and switches off.
• Focus problems.
• No focus.
• Comes on for a short time.
• Only channels in band I and band III can be tuned. (service info for OTTOVERSAND -M72315REFERENCE)
• Picture jitters. after a while. (picture attached)
• One colour missing. (+ extract of circuit diagram)
• Picture width quivers at irregular intervals.
• All display elements lit.
• Setting the reference AFC.
• Coloured horizontal stripes, become wider over time and line up vertically, picture content present.
• No picture. Dark screen.
• AF output stage ICs (TDA2052H) can be destroyed by static discharges in the appliance.
• Picture too narrow and vertically slightly too large.
• Adjusting the white value.