743800 / OTTOVERSAND [TV]

• STEREO separation adjustment.
• Battery is discharged too quickly.
• Horizontal centre adjustment.
• Chirping.
• Twisted picture when switching on from cold.
• Vibration at top of picture. Picture height changes. (OTTOVERSAND - 743800 information)
• Intermittent colour bands at high contrast.
• SECAM phase adjustment.
• Difficult colour lock on Canal Plus only.
• Crackling audio. Lines in picture. on the left.
• Starts up, but after 10 minutes picture is snowy and tuner sensibility decreases
• Stuck in standby. LED flashes once and goes OFF.
• Picture wavering at top.
• Small pulsating picture, the sound varies up and down and the brightness goes low.
• Switches off intermittently, comes then back.
• The lower half of the picture does not exist.
• No audio.
• Reduced vertical and horizontal size.
• PLL centre frequency adjustment.
• Appliance is dead. Sometimes starts if turned on and off several times.
• Power supply goes into safety mode when coming out of standby. (743800 OTTOVERSAND repair tip)
• Poor quality picture in high channels.
• Line S2055 fails immediately. FBT has been changed, TDA8372 has been changed.
• Vertical stripe in the left picture third.
• No vertical deflection.
• Starts up only after several attempts, fizzles for 10 secs, then OK.
• PSU does not oscillate. (part of circuit diagram displayed)
• Does not start when cold. Only chatters. Appliance runs when warm.
• Cut-off adjustment.
• The appliance goes out of tune in VHF.
• 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)
• Vertical IC burnt.
• Enable Hotel mode. Disable hotel mode.
• No start-up.
• White spot when switching TV off.
• No start-up. No LED. Standby OK.
• No picture and sound. Buzzing sound at switch on. Standby LED is blinking, then go to standby.
• Purity adjustment.
• Small picture with hour glass effect.
• When in standby appliance hums or crackles. LED pulses.
• Tearing visible especially with crosshatch pattern. Vertical lines. (OTTOVERSAND - 743800 information)
• Goes on and off again for a short time.
• Focus adjustment.
• Vertical lines on right of picture. First line is blue. (+ extract of circuit diagram)
• Tuning drifts.
• Occasionally the PSU does not start up. If it does, the appliance is ok. (PSU on the right with STK54041).
• 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.
• Picture shaking in random direction. (743800 tips)
• No synchronisation. intermittently.
• The screen is black and the appliance is in safety mode. There is a white horizontal line across the screen. (picture attached)
• RF AGC adjustment.
• Black screen.
• LED lights up for 1 sec. at switch on then switches off.
• 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.
• PSU doesn't start up. Pulsates.
• No memory.
• Blank raster noise appears when aerial is unplugged.
• Picture becomes snowy and image offset after approx 20 minutes of operation.
• Horizontal sync error. Spund appears only when horizontal is synchronized. Can be adjusted with pot, but fails again when switching channel.
• Bright picture. Flyback lines.
• Low contrast (after warm-up).
• Sound of AV source still audible approx. 3 sec after switching to standby. Noise when nothing is connected to AV.
• Flickering colours with Canal Plus.
• Stuck in standby. (with circuit diagram extract)
• Set dead. R502 is in open circuit but at switch on there is a bright flash and the plug fuse goes open circuit.
• "S" distortion. Cannot be adjusted.
• Trips. when cold. No or intermittent start-up. when cold.
• Switches to protection mode.
• RF AGC adjustment.
• Line output stage U is 45V.
• Stuck in standby. LED is red . (743800 OTTOVERSAND repair tip)
• No picture. (service info for OTTOVERSAND -743800)
• Excessive horizontal size.
• 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.
• Occasionally vertical picture jitter until total failure of the vertical deflection stage.
• No picture, no sound, PSU is ok. High voltage builds up over a short time then appliance switches off. (OTTOVERSAND - 743800 information)
• No audio and picture. Buzzing sound at switch on. Standby LED is blinking, then goes to standby.
• Does not memorize channels.
• Intermittently one colour disappears (RGB). (OTTOVERSAND - 743800 information)
• Intermittent line drive failure causing no picture but sound is OK.
• Hue delay adjustment. (+ extract of circuit diagram)
• Dead, channel lights OK. (743800 tip from OTTOVERSAND)
• Intermittent no video or front display.
• PSU attempts to start with noise. After 3-4 secs it stops and LED indicator goes off.
• When switching from AV input to any pretuned channel, no horizontal sync, but shortly after picture synchonizes correctly. (service info for OTTOVERSAND -743800)
• No colour.
• No vertical deflection, only a horizontal bright line. Sound OK. (743800 tip from OTTOVERSAND)
• Vertical size adjustment.
• Major components location guide. (part of circuit diagram displayed)
• Pilot tone adjustment.
• Shuts down. Standby LED does not light.
• Cut-off and white balance adjustment.
• Power supply does not function.
• Defective mains fuse. Functions OK for two weeks after replacement.
• Small, pulsating picture, low brightness, sound level varies.
• No start-up (when cold). (+ extract of circuit diagram)
• Sound IF 5.7MHz detection adjustment.
• Power supply. When rebuilding this supply, it is possible that R512 may have failed. (OTTOVERSAND - 743800 information)
• Sub-brightness adjustment.
• The power supply relaxes. (picture attached)
• Blinking colours or no colour on Canal Plus.
• 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. (part of circuit diagram displayed)
• E/W pinch and picture is folded up vertically at bottom.
• SECAM identification adjustment.
• Focus adjustment.
• No start-up. Standby LED flashes .
• BU508 fails in line output stage immediately after start-up.
• No sound or picture channel change indicator o.k. (743800 OTTOVERSAND repair tip)
• Distorted picture. No audio (intermittently).
• Switches off after a few secs. with a whistling sound. (OTTOVERSAND - 743800 information)
• Sound IF detection for 5.5MHz adjustment.
• Snowy raster. (with circuit diagram extract)
• Shuts down. at start-up.
• No picture and no sound. Image distorted.
• PLL centre frequency adjustment.
• Hum in picture. Lines shifted on top.
• 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.
• Ballooning.
• Power supply BU908 blows occasionally at switch on, never during operation. (picture attached)
• Appliance will not start up. IC701, D717 and C711 have already been changed. Appliance still won't start up. (service info for OTTOVERSAND -743800)
• During operation switches over by itself to other channels.
• Static convergence adjustment.
• No audio (intermittently).
• Does not find any channels.
• Vertical centre adjustment.
• No video or standard switching. (743800 tips)
• Shuts down. after start-up.
• Hum on sound and picture. (+ extract of circuit diagram)
• Tuning of the sound is incorrect as one track is O/C.
• Switches off by itself. at start-up.
• No colour via scart socket E1or E2.
• Picture vibrates slightly for approx. 1 min.
• After changing the deflection transistor BU 508 it blows again after 1-2 days. (extract of circuit diagram attached)
• Horizontal centre adjustment. (743800 tip from OTTOVERSAND)
• Picture width varies according to picture content. Power supply voltages ok and stable. (picture attached)
• No blue.
• The screen is black and the power supply whistles.
• Operating voltage adjustment (power supply board).
• No picture. Audio OK .
• Vertical jitter.
• No or intermittent start-up.
• Poor start up when cold. Hiccups. OK after several attempts. (743800 tips)
• Colour is uncontrollable.
• No tuning. Higher channels in band I/III/V are not received.
• Black adjustment, white adjustment.
• Mains fuse blown and mains transistor T707 (BU908) s/c.
• Necessary modification when replacing oscillator part.
• Standby LED lights even after switching on, and switches then off. Lamp lights.
• G2 is too high, if attempting to decrease, picture is visible for a few secs then becomes dark.
• Dynamic convergence adjustment. (service info for OTTOVERSAND -743800)
• After half-an-hour flashing lines appear on screen.
• Switches on. Pulsates 3 times, then switches off.
• Vertical centre adjustment.
• VIF and AFT adjustment.
• Stretched picture.
• No audio. No picture.
• Hiccups 3 times and switches off. Lamp lights.
• Distorted picture. at top.
• Vertical size adjustment.
• 00 on display, remote control often fails or no functions possible.
• Repeat failure of the STR58041.
• The picture is green and purple. No SECAM identification.
• Impossible to go into standard LL as the appliance remains locked in standard BG.
• No HV (intermittently).
• No power supply outputs.
• Stripes in picture. on the right. (service info for OTTOVERSAND -743800)
• Horizontal stripe. (service info for OTTOVERSAND -743800)
• Picture flickers, horizontally.
• Horizontal centre adjustment.
• Horizontal frequency adjustment. (service info for OTTOVERSAND -743800)
• Sound IF detection for 5.74MHz adjustment.
• Standby LED flickers for approx 10 secs. Switches off.
• At switch on, blank screen and loud hash noise.
• No start up, stuck in standby. Red LED switches off when trying to start up.
• Sub-brightness adjustment.
• Blank raster. Flyback lines.
• Line output transformer is defective.
• Set dead. Trys to come on but trips rapidly then cuts off.
• Purity fault and the sound hums. The positive temperature coefficient resistor has been changed.
• Focus 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.
• IC401 (TDA3654) fails. (service info for OTTOVERSAND -743800)
• No start-up from standby. (extract of circuit diagram attached)
• No green.
• No control of volume from front of set.
• No red.
• Carries out unwanted operating steps eg. switches off, switches over channel, changes volume etc.
• No functions.
• Intermittently one colour disappears (RGB). (743800 tips)
• E/W fault.
• Black shadow in centre of picture.
• Stuck in standby. Attempts to start up, LED flashes one time and turns off.
• Hum on sound and picture. Capacitor on mains rectifier has been changed. 12V and 16V on IC521 are too low. (picture attached)
• Line transistor blows after 1 hour.
• Line transformer reference.
• Hue delay adjustment.
• Picture is horizontally highly distorted.
• Line shakes in the top part of the picture. V amplitude jumps.
• Switches off by itself after a while. Vertical lines on picture right side of approx 10 cm. Jamming in AV mode. (service info for OTTOVERSAND -743800)
• Teletext frequency adjustment.
• Standby LED switches off after start-up. Dead.
• No start-up (when cold). Standby LED flashes . PSU pulsates.
• Can not always be switched on from standby. LED goes off.
• No colour.
• Time base whistles and goes into safety mode. Fault persists when FBT has been changed. (extract of circuit diagram attached)
• Vertical collapse.
• Vertical size adjustment.
• Dead. (with circuit diagram extract)
• No start-up (intermittently).
• When switched on the appliance goes into stand by then starts up. (part of circuit diagram displayed)
• No audio.
• Intermittent shut down, numbers still light up and the channels can be changed.
• The appliance remains in standby and the LED remains lit up.
• 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.
• Pincushion distortion.
• No RC functions. No front panel function.
• Comes on for a short time. (with circuit diagram extract)
• Sound IF 5.5MHz detection adjustment.
• Sub colour adjustment.
• Occasionally hum distortion. Rare: audio failure on certain channels. Status displays (stereo, mono, audio 1/2) change permanently. (service info for OTTOVERSAND -743800)
• Horizontal size adjustment.
• Dead. Whining.
• PSU chirps for approx 10 secs, then OK.
• Sometimes while watching a TV channel, TXT appears twisted, as if it had line tearing.
• Does not start up from standby, cracking is audible and appliance switches OFF, standby LED switches off.
• Reduced picture, low brightness and varying sound. (service info for OTTOVERSAND -743800)
• Image jitter in upper part when turning on. Disappears after a short while.
• Pilot detection adjustment.
• Dead at switch on. Standby OK.
• Picture has shifted.
• No sound or picture with normal channel lights. (743800 tip from OTTOVERSAND)
• LED flashes briefly at switch on, then appliance switches off.
• No function, red LED lights up for a short time at switch on.
• At switch on, stand by display lights up for a short time, line end stage attempts to work, but switches off again straight away.
• Does not start up. LED comes on then goes off immediately.
• Picture is small and pulses, brightness is low and the sound is variable.
• Picture pulls inwards at the top
• Very distorted picture with very strong vertical waves and picture almost black and white. (picture attached)
• Pilot tone adjustment.
• Sub colour adjustment.
• Picture becomes quite dark and gets distorted after 20 or 30 minutes. (743800 OTTOVERSAND repair tip)
• PSU whistles. in standby. (743800 tip from OTTOVERSAND)
• R702 fails at once if the aerial cable is plugged in (cable connection).
• Faulty vertical deflection.
• Power supply squeeling and dead.
• Stand-by LED does not function.
• STEREO separation adjustment.
• Vertical IC fails at switch on.
• Erratic start-up.
• Set dead or intermittently dead. Set may not go to standby via remote.
• No sound or nasal sound.
• Encrypted Canal Plus after 1 hr.