743801 / OTTOVERSAND [TV]

• Image jitter in upper part when turning on. Disappears after a short while.
• Small, pulsating picture, low brightness, sound level varies.
• No colour.
• The appliance goes out of tune in VHF.
• Vertical IC fails at switch on.
• Shuts down. at start-up.
• Static convergence adjustment.
• Distorted picture. No audio (intermittently).
• Purity fault and the sound hums. The positive temperature coefficient resistor has been changed.
• Black shadow in centre of picture.
• Horizontal centre adjustment.
• Focus adjustment.
• Starts up, but after 10 minutes picture is snowy and tuner sensibility decreases
• Stuck in standby. Attempts to start up, LED flashes one time and turns off.
• No start-up.
• G2 is too high, if attempting to decrease, picture is visible for a few secs then becomes dark.
• Enable Hotel mode. Disable hotel mode.
• No sound or nasal sound.
• Set dead or intermittently dead. Set may not go to standby via remote.
• Vertical size adjustment. (743801 OTTOVERSAND repair tip)
• Line shakes in the top part of the picture. V amplitude jumps.
• Pincushion distortion.
• No start-up (intermittently).
• Standby LED flickers for approx 10 secs. Switches off.
• "S" distortion. Cannot be adjusted.
• Switches off and goes to standby after hours or days. After switching back on, the appliance switches off again after 30 mins. After that, in even shorter time.
• Hum on sound and picture. Capacitor on mains rectifier has been changed. 12V and 16V on IC521 are too low. (with circuit diagram extract)
• Power supply BU908 blows occasionally at switch on, never during operation. (with circuit diagram extract)
• Power supply. When rebuilding this supply, it is possible that R512 may have failed.
• Occasionally vertical picture jitter until total failure of the vertical deflection stage.
• Pilot tone adjustment.
• After half-an-hour flashing lines appear on screen.
• Necessary modification when replacing oscillator part.
• No audio.
• Dynamic convergence adjustment.
• No or intermittent start-up.
• Tuning of the sound is incorrect as one track is O/C.
• No green. (OTTOVERSAND - 743801 information)
• Set dead. Trys to come on but trips rapidly then cuts off.
• Comes on for a short time. (with circuit diagram extract)
• Intermittent shut down, numbers still light up and the channels can be changed. (743801 OTTOVERSAND repair tip)
• Dead. (picture attached)
• Distorted picture. at top.
• Impossible to go into standard LL as the appliance remains locked in standard BG.
• Appliance is dead. Sometimes starts if turned on and off several times.
• No audio.
• Encrypted Canal Plus after 1 hr.
• The power supply relaxes. (extract of circuit diagram attached)
• Repeat failure of the STR58041.
• At switch on, stand by display lights up for a short time, line end stage attempts to work, but switches off again straight away.
• Intermittently one colour disappears (RGB).
• Battery is discharged too quickly.
• No start-up. No LED. Standby OK.
• No start-up from standby. (part of circuit diagram displayed)
• Hue delay adjustment.
• Vertical centre adjustment.
• Blank raster noise appears when aerial is unplugged.
• The screen is black and the appliance is in safety mode. There is a white horizontal line across the screen. (+ extract of circuit diagram)
• Sub colour adjustment.
• Does not start up from standby, cracking is audible and appliance switches OFF, standby LED switches off.
• Intermittently one colour disappears (RGB). (service info for OTTOVERSAND -743801)
• Picture shaking in random direction.
• RF AGC adjustment.
• No picture. Audio OK .
• The side of the picture drops and a horizontal line appears. Only a third of the line end stage works. The sound is missing, but the power supply unit operates.
• Operating voltage adjustment (power supply board).
• Tearing visible especially with crosshatch pattern. Vertical lines.
• PSU doesn't start up. Pulsates.
• Bright picture. Flyback lines. (OTTOVERSAND - 743801 information)
• When switching from AV input to any pretuned channel, no horizontal sync, but shortly after picture synchonizes correctly. (OTTOVERSAND - 743801 information)
• Reduced picture, low brightness and varying sound.
• Focus adjustment.
• Line output stage U is 45V.
• No sound or picture with normal channel lights.
• No picture, no sound, PSU is ok. High voltage builds up over a short time then appliance switches off.
• No functions.
• LED lights up for 1 sec. at switch on then switches off.
• Power supply goes into safety mode when coming out of standby.
• Focus adjustment.
• After changing the deflection transistor BU 508 it blows again after 1-2 days. (extract of circuit diagram attached)
• Vertical size adjustment.
• Standby LED lights even after switching on, and switches then off. Lamp lights.
• No red.
• The appliance remains in standby and the LED remains lit up.
• No start-up (when cold). Standby LED flashes . PSU pulsates. (OTTOVERSAND - 743801 information)
• Can not always be switched on from standby. LED goes off.
• Defective mains fuse. Functions OK for two weeks after replacement.
• Vertical stripe in the left picture third.
• E/W pinch and picture is folded up vertically at bottom. (743801 tips)
• SECAM identification adjustment.
• When switched on the appliance goes into stand by then starts up. (+ extract of circuit diagram)
• Excessive horizontal size.
• Station memory cuts out intermittently, especially when connecting the cable the stations fall out. Then the contrast adjustment gets defective and the appliance doesn't respond to the RC. (743801 tip from OTTOVERSAND)
• No video or standard switching.
• No memory.
• No tuning. Higher channels in band I/III/V are not received.
• Shuts down. Standby LED does not light.
• IC401 (TDA3654) fails.
• Vibration at top of picture. Picture height changes.
• No start-up (when cold). (with circuit diagram extract)
• PSU chirps for approx 10 secs, then OK.
• Hum in picture. Lines shifted on top.
• Picture flickers, horizontally.
• Vertical lines on left side of screen, thiner towards edges and bigger towards centre, approx. 10 cm on screen. Lines tremble. Fault present also in AV mode with black screen. Switches off after a while.
• Hue delay adjustment. (+ extract of circuit diagram)
• Sound IF 5.7MHz detection adjustment.
• Switches off by itself. at start-up.
• Vertical IC burnt.
• SECAM phase adjustment.
• During operation switches over by itself to other channels.
• Intermittent colour bands at high contrast. (OTTOVERSAND - 743801 information)
• Cut-off and white balance adjustment.
• Occasionally hum distortion. Rare: audio failure on certain channels. Status displays (stereo, mono, audio 1/2) change permanently.
• Stripes in picture. on the right.
• Vertical collapse.
• Stuck in standby. (extract of circuit diagram attached)
• R702 fails at once if the aerial cable is plugged in (cable connection).
• Horizontal frequency adjustment.
• Sub-brightness adjustment.
• PSU does not oscillate. (with circuit diagram extract)
• Pilot tone adjustment.
• Cut-off adjustment. (743801 tips)
• Sub-brightness adjustment.
• Switches on. Pulsates 3 times, then switches off.
• PSU attempts to start with noise. After 3-4 secs it stops and LED indicator goes off.
• 00 on display, remote control often fails or no functions possible.
• Sound IF detection for 5.5MHz adjustment.
• Small picture with hour glass effect. (743801 tips)
• STEREO separation adjustment.
• Vertical jitter.
• Picture has shifted.
• No HV (intermittently).
• Horizontal size adjustment.
• Power supply does not function.
• Picture pulls inwards at the top (743801 tip from OTTOVERSAND)
• The picture is green and purple. No SECAM identification.
• Line transistor blows after 1 hour.
• Appliance will not start up. IC701, D717 and C711 have already been changed. Appliance still won't start up.
• Switches off after a few secs. with a whistling sound.
• Shuts down. after start-up.
• Time base whistles and goes into safety mode. Fault persists when FBT has been changed. (picture attached)
• Standby LED switches off after start-up. Dead.
• Stuck in standby. LED flashes once and goes OFF.
• Sound of AV source still audible approx. 3 sec after switching to standby. Noise when nothing is connected to AV.
• No audio and picture. Buzzing sound at switch on. Standby LED is blinking, then goes to standby. (OTTOVERSAND - 743801 information)
• No audio (intermittently).
• Switches off intermittently, comes then back.
• Stuck in standby. LED is red .
• Very distorted picture with very strong vertical waves and picture almost black and white. (extract of circuit diagram attached)
• Stand-by LED does not function.
• No picture and sound. Buzzing sound at switch on. Standby LED is blinking, then go to standby.
• No start up, stuck in standby. Red LED switches off when trying to start up. (743801 tips)
• Sound IF detection for 5.74MHz adjustment.
• Does not start up. LED comes on then goes off immediately.
• E/W fault.
• No picture.
• PLL centre frequency adjustment.
• Small pulsating picture, the sound varies up and down and the brightness goes low.
• Dead. Whining. (743801 OTTOVERSAND repair tip)
• Line S2055 fails immediately. FBT has been changed, TDA8372 has been changed.
• Teletext frequency adjustment.
• Blinking colours or no colour on Canal Plus.
• Faulty vertical deflection.
• No picture and no sound. Image distorted.
• White spot when switching TV off.
• Line transformer reference.
• Blank raster. Flyback lines.
• Sometimes while watching a TV channel, TXT appears twisted, as if it had line tearing.
• Picture wavering at top.
• Occasionally the PSU does not start up. If it does, the appliance is ok. (PSU on the right with STK54041).
• Difficult colour lock on Canal Plus only.
• Does not start when cold. Only chatters. Appliance runs when warm.
• Poor quality picture in high channels.
• Flickering colours with Canal Plus. (743801 OTTOVERSAND repair tip)
• Trips. when cold. No or intermittent start-up. when cold.
• Black adjustment, white adjustment.
• No sound or picture channel change indicator o.k.
• No RC functions. No front panel function. (service info for OTTOVERSAND -743801)
• Goes on and off again for a short time.
• Sound IF 5.5MHz detection adjustment.
• Picture is horizontally highly distorted.
• RF AGC adjustment.
• No vertical deflection, only a horizontal bright line. Sound OK.
• Picture width varies according to picture content. Power supply voltages ok and stable. (extract of circuit diagram attached)
• Crackling audio. Lines in picture. on the left.
• Switches to protection mode. (743801 tip from OTTOVERSAND)
• STEREO separation adjustment.
• Carries out unwanted operating steps eg. switches off, switches over channel, changes volume etc.
• 24V when disconnecting collector of line transistor, otherwise voltage collapses. Line transformer does not start up. 5V on IC721. Display does not light up, standby lights up. (picture attached)
• No synchronisation. intermittently.
• Major components location guide. (part of circuit diagram displayed)
• Intermittent line drive failure causing no picture but sound is OK.
• The station storage breaks down completely, when connected to cable, all the programmes are mixed up. The contrast control is defective and the remote control does not work. (part of circuit diagram displayed)
• Stretched picture. (743801 OTTOVERSAND repair tip)
• The screen is black and the power supply whistles.
• Vertical lines on right of picture. First line is blue. (part of circuit diagram displayed)
• Picture becomes quite dark and gets distorted after 20 or 30 minutes.
• Picture vibrates slightly for approx. 1 min.
• Chirping.
• No blue.
• Sub colour adjustment. (service info for OTTOVERSAND -743801)
• No vertical deflection.
• Dead at switch on. Standby OK.
• Does not find any channels.
• Low contrast (after warm-up).
• When in standby appliance hums or crackles. LED pulses. (743801 tip from OTTOVERSAND)
• VIF and AFT adjustment.
• The lower half of the picture does not exist.
• Line output transformer is defective.
• At switch on, blank screen and loud hash noise.
• Horizontal centre adjustment.
• Does not start. PSU starts up briefly, then protective circuit is active.
• Occasionally, goes from top of picture to the green, hum in the speaker and dark bar. Goes from bottom to top.
• Horizontal sync error. Spund appears only when horizontal is synchronized. Can be adjusted with pot, but fails again when switching channel.
• Pilot detection adjustment.
• Horizontal stripe.
• Horizontal centre adjustment. (743801 OTTOVERSAND repair tip)
• Hiccups 3 times and switches off. Lamp lights.
• Dead, channel lights OK.
• Tuning drifts.
• Starts up only after several attempts, fizzles for 10 secs, then OK.
• No colour.
• Picture is small and pulses, brightness is low and the sound is variable.
• No power supply outputs.
• No function, red LED lights up for a short time at switch on.
• No start-up. Standby LED flashes .
• Power supply squeeling and dead.
• PSU whistles. in standby.
• Does not memorize channels.
• Mains fuse blown and mains transistor T707 (BU908) s/c.
• The appliance switches off after hours or days and goes to standby. After switching on again it switches off after an even shorter period of time.
• Twisted picture when switching on from cold.
• Erratic start-up.
• Hum on sound and picture. (+ extract of circuit diagram)
• Snowy raster. (picture attached)
• Purity adjustment.
• No control of volume from front of set.
• Ballooning.
• LED flashes briefly at switch on, then appliance switches off.
• No colour via scart socket E1or E2.
• Vertical centre adjustment.
• Black screen.
• Set dead. R502 is in open circuit but at switch on there is a bright flash and the plug fuse goes open circuit.
• Poor start up when cold. Hiccups. OK after several attempts.
• Reduced vertical and horizontal size.
• No audio. No picture.
• BU508 fails in line output stage immediately after start-up.
• Vertical size adjustment.
• Picture becomes snowy and image offset after approx 20 minutes of operation. (743801 OTTOVERSAND repair tip)
• Colour is uncontrollable.
• Switches off by itself after a while. Vertical lines on picture right side of approx 10 cm. Jamming in AV mode.
• Intermittent no video or front display. (service info for OTTOVERSAND -743801)
• PLL centre frequency adjustment.