25D81 / SCHAUBLORENZ [TV]

• Does not switch ON. No power light showing.
• Time constant switching over only occurs on memory sites 37 to 39 and AV.
• No picture content. Picture is greyish. (picture attached)
• E/W fault. (with circuit diagram extract)
• Intermittent loss of brightness, picture is black. Can be adjusted with RC. Or vice versa, picture is too light and can be adjusted.
• Stops after 5 seconds. No standby LED. (part of circuit diagram displayed)
• Vertical hum bars on picture, sometimes very visible and sometimes hardly at all.
• NICAM check.
• No tuning. only on certain channels. Dark screen. on the right.
• Vertical lines. No colour. after a while.
• Noise in picture. Poor horizontal synchronisation.
• No start-up (when cold). (service info for SCHAUBLORENZ -25D81)
• Blue, vertical stripe in the right third of the picture.
• Sound channel 1 and 2 voltage level adjustment.
• No colour (intermittently).
• Vertical jitter. when cold.
• No tuning. Higher channels in band I/III/V are not received.
• Line transformer starts up but no display, nothing on the screen and no sound. (picture attached)
• Does not switch to standby. (extract of circuit diagram attached)
• Dark screen at start up. Line transformer ok with flyback lines. Top 2 or 3 lines ok. In PB apparently functions around the IC TDA8372A. (with circuit diagram extract)
• Black bar on the right side of the screen. Similar to displacement. (with circuit diagram extract)
• After the appliance is switched off a large spot of light appears for several seconds in the middle of the screen. (part of circuit diagram displayed)
• Hums at switch on. (picture attached)
• No functions.
• No tuning. (25D81 tips)
• Motorboating noise at switch on. When you change IC701 the TV starts up again, it is possible to switch it off and to start it up by using standby. Otherwise, the fault starts again. (with circuit diagram extract)
• Remains in standby after changing power IC. (picture attached)
• Line transistor S2000AF defective at switch on from cold. (picture attached)
• Noise in the speakers and no start up or display on the front panel when switching on. (part of circuit diagram displayed)
• Picture shifted to the right.
• Poor adjustment of horizontal picture centering. (+ extract of circuit diagram)
• Vertical line tearing. intermittently.
• When appliance receives in Nicam stereo, the TV goes into PAL.
• At switch ON, set screams. Pressing on the on/off switch gives same condition. Standby LED's off.
• Few segments of the display too bright. Doesn't respond to commands.
• No HT output from power supply. OK in standby. (+ extract of circuit diagram) (service info for SCHAUBLORENZ -25D81)
• Brightness varies. E/W fault. intermittently.
• Shadowing effect, left side of picture is brighter than the right one. (picture attached)
• Standby display lights up briefly, then no function.
• Picture goes off after 1 minute; very low contrast, ok through scart. (extract of circuit diagram attached)
• No HV. (service info for SCHAUBLORENZ -25D81)
• Picture takes 15 secs. to appear. Sound ok and EHT present.
• No horizontal synchronisation. at start-up. (with circuit diagram extract)
• Line output stage fails at switch on. With load (lamp) appliance can be switched on with squeaking noise. (+ extract of circuit diagram)
• No vertical deflection. intermittently.
• Collapses at start up, then switches off.
• No TXT.
• No start-up from standby.
• PSU pulsates. Sound crackles. After few secs. appliance works fine.
• Double picture. (service info for SCHAUBLORENZ -25D81)
• HV arcing. (part of circuit diagram displayed)
• Only standby LED lit. LED switches off at switch on then no function.
• Excessive HV. (with circuit diagram extract)
• Long picture at start up, black screen with rainbow spots.
• Illegible display. (extract of circuit diagram attached)
• White point when switching off with ON/OFF switch. No point in standby.
• Cycles on/off.
• Low brightness. Picture too big.
• Approx. 1cm bright, vertical line on the right hand side of the picture approx. 10cm from the edge.
• No picture (intermittently). (25D81 tip from SCHAUBLORENZ)
• Output transistor (S2000) fails when started from cold.
• Vertical and horizontal synchronisation available only after 2 mins.
• No functions. Red LED does not flash.
• Coloured lines (RGB test lines) in top of picture. (service info for SCHAUBLORENZ -25D81)
• Black bars on the bottom of picture. If V-amplitude is altered, picture disappears on the bottom. (extract of circuit diagram attached)
• Programmes change by themselves. RC is OK. (25D81 SCHAUBLORENZ repair tip)
• No start up after changing FBT and constant whistling noise. (with circuit diagram extract)
• Wavy vertical lines in the entire picture when cold. Picture jitters. (with circuit diagram extract)
• Pincushion distortion.
• Loses sync at start-up for a few minutes.
• No vertical deflection. Only a horizontal bright line appears on CRT. Audio OK. (picture attached)
• Line tearing. (+ extract of circuit diagram)
• Picture shaking in a random direction. (picture attached)
• Noise in audio. (+ extract of circuit diagram)
• Intermittent block.
• Blocked control processor.
• Does not go into TXT mode. Mixed mode possible.
• Picture is distorted and changes. Loss of colours. (with circuit diagram extract)
• Dead.
• Motorboating noise at switch on. Pin 13 of the TDA8372A is unsoldered. TV no longer pulsates. Power supply voltages ok. (part of circuit diagram displayed)
• Power supply defective after a few days. (part of circuit diagram displayed)
• Unstable picture. (part of circuit diagram displayed)
• Remains in standby. Starts up when wiper forced. 88 on display. No picture and no sound. Goes into standby as soon as switch is released. (with circuit diagram extract)
• Left picture side is brighter, even via AV. (picture attached)
• PSU chirps, at the same time bubbling and hum in loudspeakers. No functions. (+ extract of circuit diagram)
• Grey picture at switch on and sound which disappears after 15 mins. Grey screen with frizzy line on the sides when pressing G2.
• Does not start from Standby.
• No picture. No audio. (+ extract of circuit diagram)
• Erratic functions. (+ extract of circuit diagram)
• Bright raster. Flyback lines.
• Switches to standby when mains switch is plugged in. Switches off when using RCU. (+ extract of circuit diagram)
• Black picture. Sound OK. Picture is OK after restart. (part of circuit diagram displayed)
• No start-up. (picture attached)
• Top third of screen has ragged vertical lines.
• Only snow in the picture, after changing the tuner the fault is still there.
• Vertical, bright stripe faintly visible in the right third of the picture.
• Picture distorted, shifted upwards and a little bit too wide.
• After approx 20 mins colour TV switches off.
• White, horizontal lines at the top of the picture. Lines decrease after a while but never disappear completely.
• Starts with noise (approx. 2-3 seconds), then it operates normally. (extract of circuit diagram attached)
• Horizontal shaking. when cold.
• Control unit does not function. Does not switch on. (+ extract of circuit diagram)
• Line BU is abnormally hot.
• Programming menu can not be accessed. (extract of circuit diagram attached)
• At switch on, functions but with no picture. By pressing the CRT module it unblocks and the picture appears. Predominant colour depends on the pressure used.
• Can be switched to standby only if power plug is pulled out.
• Horizontal white line.
• Lines in picture.
• Dark screen, only diffuse glow.
• No control and cannot be switched off when started up from standby.
• Horizontal stripe. in the centre.
• Picture and sound missing. Via scart socket with video recorder OK (extract of circuit diagram attached) (service info for SCHAUBLORENZ -25D81)
• Picture is out of alignment horizontally. 10cm black bar on the right. (with circuit diagram extract)
• Picture with a 10cm vertical band on the right side. Negative picture behind this black band.
• The plug receptacle of the teletext decoder, which is contained in the additional component, does not fit mechanically into the socket receptacle of the appliance chassis.
• Switches on for a short time with RC, then switches off. "I" and "II" flicker on display. LED doesn't light. Starts up again with RC, if previously disconnected from mains.
• Picture is brighter on the right. Poor synchronisation after program switch-over. Picture becomes brighter and darker in AV. (extract of circuit diagram attached)
• Stuck in standby; RC ineffective. Stanby LED flickers. (extract of circuit diagram attached)
• Poor audio.
• Line tearing. at top. (picture attached)
• Excessive horizontal size. (picture attached)
• Poor shading of picture, dark on one side and light on the other. (+ extract of circuit diagram)
• When ON/OFF switch is pressed LED lights up and then switches off. If line BU is replaced by lamp, it lights up and collector goes down to 124V instead of 155V. (extract of circuit diagram attached)
• Instructions on how to put appliance into Service-Mode.
• High voltage build up for short time then PSU switches off. (picture attached) (25D81 tips)
• Faulty colour (green tinge, on upper picture edge, intermittently present). B/W picture OK. TXT and menu are OK too.
• No picture. Hum in audio.
• No start up after changing IC601. Nothing lights up on the front.
• Brightness differs between left and right hand side of the screen.
• Picture shifted to the left. Alignment works normally. (with circuit diagram extract)
• No functions. after a while.
• 10cm black bar on the right of the screen. Voltages ok, corrections work. (part of circuit diagram displayed)
• Comes on for a short time. (picture attached)
• Blanking interval on left side of picture, colour flickers and screen dark after a while.
• Will not select text, or will only select mix or full text but not both, various other functions faulty.
• As described in the manual it is possible to operate the video recorder on all program places through the aerial. But some appliances only change over on channels 37-39.
• Switches off completely after switch on. No standby function. (extract of circuit diagram attached)
• Impossible to adjust synchronisation. Picture shifted towards left. Right side of picture reduced by 8cm. (part of circuit diagram displayed)
• Picture shifted to the left, too small and not adjustable. (+ extract of circuit diagram)
• Display flashing and rattles at switch on. (picture attached)
• Blank raster.
• At Power On standby LED switches off immediately after switching on.
• Especially when cold some channels are not in the French standard. They remain in FM sound and inverted video. When warm and when changing programme suddenly picture and sound appear correctly. (picture attached)
• Channel TF1 (channel 22) does not hold in SECAM: remains in PAL. The other channels are normal.
• Picture too big. (with circuit diagram extract)
• Vertical curtain-like stripes which may be distributed over the entire screen. (+ extract of circuit diagram)
• Defective linearity.
• Text selection is not possible, takes only Mix or full text but not both. Also various other functions are defective.
• Stuck in standby. (service info for SCHAUBLORENZ -25D81)
• Enter service mode.
• Line foldover by start-up. No sound. After warm-up, picture and sound are OK. Sync is still unstable. (SCHAUBLORENZ - 25D81 information)
• Picture with vertical and horizontal lines (when cold).
• If switched to standby, appliance pulsates and can be heard in loudspeakers. (extract of circuit diagram attached)
• Picture tearing.
• Ok with signal. Without signal: unstable line frequency, line stage transformer makes a loud whistling noise and T511 (scanning transistor) shorts. (+ extract of circuit diagram)
• Hum bars, especially on yellow or orange background.
• Whistling HT. No start up due to incorrect HT frequency. May blow S2000 immediately. (extract of circuit diagram attached)
• Unclear picture with Hum content.
• NICAM is missing.
• Dark picture. intermittently.
• Slightly wavy picture in the middle of the screen. (part of circuit diagram displayed)
• At start up the power supply starts up for 2 secs then the appliance apparently goes into safety mode. No fault on the secondary.
• Switches off when selecting a function via RC.
• Line frequency changes downward (squeaking, whistling).
• No synchronisation (after start-up). (extract of circuit diagram attached)
• Insufficient picture heigth (10cm) and severe linear distortion.
• Sound cracks. Switches off. Display stays. Can be restarted with RC. (part of circuit diagram displayed)
• Shuts down. after start-up. (+ extract of circuit diagram)
• Switches to protection mode. at start-up. (picture attached)
• No TXT (intermittently).
• No vertical deflection. Horizontal line. Audio OK . (with circuit diagram extract)
• Horizontal jitter. when cold.
• Secondary voltages appear for 1 to 2 secs. then nothing else. Standby LED switches off.
• At switch on appliance pulsated then reverts to standby again.
• Bright vertical stripes. No picture content. Sound OK. (+ extract of circuit diagram)
• The picture is too large and wavers.
• Impossible to adjust the horizontal synchronization. Picture has shifted 10cm to the left. TDA 8372A on pin 20 has already been replaced, sandcastle incorrect. Power supply is good. (extract of circuit diagram attached)
• High voltage transistor (S2000) defective. (picture attached)
• The teletext contrast is considerably too high after installing the teletext decoder.
• Excessive vertical size. Vertical foldover at bottom.
• No picture. on lower half screen. (with circuit diagram extract)
• FBT blows after a few mins. (part of circuit diagram displayed)
• Approx 20cm wide dark area in centre of picture and line tearing.
• Poor line and picture synchronisation when cold.
• In a grey area - independent of colour saturation - you can see 2 vertical zones approx 15cm wide, greeny blue in colour with coloured edges.
• Switches to standby (intermittently).
• Does not switch on. Fluttering noise from the loudspeakers. (extract of circuit diagram attached)
• Appliance whistles. Sound and picture present. Picture interference (lines approx one centimeter apart over the whole of the picture). (25D81 SCHAUBLORENZ repair tip)
• Does not fully go to TXT or only blue mix TXT. (picture attached)
• Slow start-up. when cold. (part of circuit diagram displayed)
• When TV started up, transistor (S2000AF) instantly burn out. (picture attached)
• Loud noise. at start-up.
• Centre of snowy picture is darker than edges. (picture attached)
• Horizontal synchronisation fault, picture shifted towards left side. (+ extract of circuit diagram)
• White horizontal stripe about 5 cm from the bottom. Picture content bellow stripe is altered and noisy.
• EHT is heard starting up then everything stops 4 secs later.
• Rattling noise or bubbling at start-up (when cold). (part of circuit diagram displayed)
• PSU doesn't start up when cold. (part of circuit diagram displayed)
• Vertical IC fails. (extract of circuit diagram attached)
• Halts at switch on when cold. No start up. OK after a few attempts. (part of circuit diagram displayed)
• Dead. after start-up.
• At switch on picture is condensed tnen enlarged. Pops loudly at approx 2 pulses per sec. Intermittent blast from speakers. (extract of circuit diagram attached)
• Dark screen. on the right. (picture attached)
• No start up, no standby light, variable voltage on pin 16 of IC701. (+ extract of circuit diagram)
• Hums at switch on, dies out slowly.
• Very slight flickering with a light picture. (picture attached)
• Too wide picture and East/West pincushion curving outward. (extract of circuit diagram attached) (25D81 tip from SCHAUBLORENZ)
• Control unit processor is defective. (with circuit diagram extract)
• Power supply hiccups.
• At switch on, lights light up for an instant, voltage which ought to reach 145V increases to 60V but then goes back to 0V. (part of circuit diagram displayed)
• Poor PSU start up. Severe crackle in the loudspeaker. (SCHAUBLORENZ - 25D81 information)
• Vertical dark bands running from left to centre of picture and separated by approx. 5cm.
• Black vertical bars on picture, mostly visible in AV with no video source. (with circuit diagram extract)
• E/W trapezium does not function.
• Dark picture on 2/3 of screen on the left but brighter on 1/3 of screen on the right. (+ extract of circuit diagram)
• Focus problem. Blurred vertically, ok horizontally after replacing microprocessor and line transformer.
• Does not start up each time. When it functions, whistling and modulation of picture. This gets less in time.
• Horizontal jitter. Vertical jitter. (+ extract of circuit diagram) (service info for SCHAUBLORENZ -25D81)
• Picture shifted to the left. (picture attached)
• Strong blue dominance at top of picture. Rest of picture (approx half) ok. (+ extract of circuit diagram)
• Automatic B/G-L detection does not work correctly with the Nicam sound carrier (TF1, FRANCE 2).
• PSU is defective. 300V is present.
• 88 shown on LED display.
• PSU doesn't start-up or only after a while. Cracking sound.
• Line transformer starts up with an amplitude of 400V blemished by many interference lines.
• Picture shifted horizontally. (picture attached)
• Horizontal picture position is incorrect, 5cm to the left. No picture intermittently. (with circuit diagram extract)
• When the appliance is switched on it goes into undefined operating conditions ie. in spite of correct operating voltages the appliance has eg. no picture, no sound, no display etc.
• Vertical collapse. (part of circuit diagram displayed)
• One side of picture is black. (25D81 tip from SCHAUBLORENZ)
• White screen, horizontal lines without video signal. OK on scart output T971 OK IC950 OK. No beam limiter on 15 of IC950. Flash on the screen when changing channels.
• LED lights up briefly then nothing more.
• Buzzing at start-up.
• PSU switches from standby to safety mode at switch on.
• Does not go into text mode, mix mode is not possible.
• Operation commands are not carried out.
• From a cold start line output stage transistor fails. (25D81 tips)
• Distorted picture. on the right. (+ extract of circuit diagram)
• Picture has moved approx 10cm to the left. Vertical black bar with a few coloured streaks. Colour OK. (extract of circuit diagram attached)
• PSU fails intermittently. (picture attached)
• Excessive brightness. Flyback lines. (picture attached) (25D81 tips)
• AV correction.
• Bright picture. on the right. Dark picture. on the left. (picture attached)
• Picture appears slowly. (with circuit diagram extract)
• Standby display lights up for a short time. Line output stage attempts to function, but switches off immediately.
• Picture rolls. when cold. (part of circuit diagram displayed)
• No picture. Audio OK . (with circuit diagram extract)
• Wavy picture. at top. (picture attached)
• Transistor T701 fails when appliance is switched off and on.
• HV appears briefly and then disappears. (extract of circuit diagram attached)
• Only blue light at right in picture.
• Dark picture. Stripes after a while. OK after warm-up. (+ extract of circuit diagram)
• Goes into PAL reception when in NICAM reception on channel 64, programme N1.
• Intermittent no image or yellow colouring. Knock sensitive. (picture attached)
• Flashing picture. (with circuit diagram extract)
• Picture shifted to the left. Sometimes picture fails completely, then still only picture blanking stripes visible. (picture attached)
• No audio (when cold).
• Line BU voltage = 140V. Value of capacitor C701 (in PSU) illegible. Still no display if line BU disconnected. (picture attached)
• No horizontal synchronisation. (+ extract of circuit diagram)
• Dark picture. on the right. (with circuit diagram extract)
• Distorted vertical linearity. Barrel distortion. (with circuit diagram extract)
• Intermittently dead. (extract of circuit diagram attached)
• Shuts down. (picture attached)
• Picture amplitude is too weak.
• No horizontal or vertical deflection.
• Poor PSU start-up or BU defective. (extract of circuit diagram attached)
• Vertical or horizontal picture shaking both when hot and cold. (picture attached)
• Horizontal collapse. after a while. (picture attached)
• Vertical IC (TDA3654) becomes hot, then fails after several hours. Picture OK. (part of circuit diagram displayed)
• E/W-fault.
• Reduced contrast, especially on one side of the screen.
• No synchronisation during the first few mins. (+ extract of circuit diagram)
• Picture is too wide. E/W distorted.
• Picture collapse on half of the picture.
• Excessive brightness. in the centre. (extract of circuit diagram attached)
• Occasionally blue screen. Picture ok when G2 adjusted then disappears again. When pressed too much picture remains incorrect then disappears.
• Line synchronisation available only after 2 mins.
• After transporting an appliance, the first time it starts up there may be distorted playback of colour (flickering, drop out or stripes) and/or defective teletext playback.
• Attempts to start with no result. (part of circuit diagram displayed)
• PSU starts briefly, then no more HV. (+ extract of circuit diagram)
• Afterglow on deflection tube after switch off.
• Dark picture.
• Switches off immediately after plugging in mains. (extract of circuit diagram attached) (25D81 SCHAUBLORENZ repair tip)
• Horizontal line.
• Picture only appears about 3 mins after switch on, when appliance is cold.
• Intermittently line tearing in the middle (approx. 20cm wide). (extract of circuit diagram attached)
• Cuts out after switch on, soft hum from the speakers in standby mode.
• Motorboating noise at switch on then goes into standby. When frame IC is unsoldered TV starts up. (with circuit diagram extract)
• Reduced raster size. (extract of circuit diagram attached)
• HT starts up, appliance switches off immediately. Power supply with lamp OK but documentation states voltage must be 60-100V when pin 4 of line transformer disconnected and lamp connected to D765 60-100V. Voltage in this case is 145V.
• Tripping.
• Resistor R775 is defective.
• Black screen. Display flashes once at switch on.
• PSU can not be loaded with 60W incandescent lamp.
• No colour.
• Pulsating picture. (part of circuit diagram displayed) (25D81 tip from SCHAUBLORENZ)
• Poor vertical linearity at the bottom, also E/W error. (service info for SCHAUBLORENZ -25D81)
• White screen. Flyback lines.
• No PSU start-up.
• Random operation commands.
• Unstable horizontal picture. (service info for SCHAUBLORENZ -25D81)
• Whenever a function is requested display lights up then switches off.
• Very pale picture which is shifted to the left. Voltage is correct. (+ extract of circuit diagram)
• Front LED briefly lights up at switch on then it switches off. LED remains lit when mains plug is connected and disconnected but it definitely switches off at start up.
• Horizontal synchronisation fault even after replacing TDA8372. Weak adjustment with pot R634. Line synchronisation OK. Comparator OK. Horizontal linearity is OK. (with circuit diagram extract)
• HV builds up briefly and then shuts down
• Reduced vertical size. (25D81 tips)
• Intermittently line transistor defective at start up. Fault also occurs intermittently in channel search or when switching to another channel. Once appliance runs, it runs well.
• Goes into safety mode at switch on. If FBT is unsoldered then HT is re-established. No apparent S/C in secondary of FBT. (+ extract of circuit diagram)
• No E/W correction. (with circuit diagram extract)
• High voltage runs high. Flashover all over.
• Blank screen with purple haze at left hand side. (+ extract of circuit diagram)
• Power supply seems to remain in safety mode. (+ extract of circuit diagram) (25D81 tip from SCHAUBLORENZ)
• Poor synchronisation. No picture. after a while.
• Resistor R515 becomes defective. (part of circuit diagram displayed)
• No raster sync in HF. Ok in scart. (extract of circuit diagram attached)
• Convex picture. Defective lower linearity. (with circuit diagram extract)
• Eliminate safety mode of PSU.
• Unusual TXT.
• Intermittent flyback lines. Grey scale varies intermittently. Possibly no picture.
• Builds up high voltage for a short time and then switches off. (+ extract of circuit diagram) (SCHAUBLORENZ - 25D81 information)
• PSU cannot be started from Stand By. 145V voltage in an unloaded condition is at approx 105V, the connected lamp does not light up, the voltage then collapses to approx 20V. (with circuit diagram extract)
• Faint and too dark picture. Low brightness, contrast cannot be adjusted. Colour is adjustable.
• At the top edge of the picture an unusual stain effect appears and line tearing.
• Blue screen. Flyback lines. Audio OK .
• T501 fails repeatedly.
• DF-AF adjustment.