2000 / DEMOLUX [Projectors]

• Top part of the picture is too wide, the bottom part is too narrow
• Distorted low with buzz similar to quad coil off.
• RL24 (2K2) in line scan circuit burnt.
• Three coloured lines at top of picture when channel change selected.
• Does not work on a 12V supply, only on mains supply. (2000 tip from DEMOLUX)
• No or poor picture. (service info for DEMOLUX -2000)
• Unstable program lock. (DEMOLUX - 2000 information)
• Hum in audio. in standby. (extract of circuit diagram attached)
• Oversized picture on top and narrow picture at the bottom.
• Black and white flash on Canal Plus intermittently.
• Channel sequencing.
• Rippling effect on picture. Sound squealing.
• Line jitter at low signal levels (20"Models).
• Blank raster. (+ extract of circuit diagram)
• Only top two thirds of picture are scanned. Picture folds over.
• Rolls and flips over 1 or 2 times a min intermittently.
• Flyback lines present regardless of height.
• No channel search.
• Unstable picture. Patterns in picture.
• Very bright screen with low height and top foldover. Screen control seems to act as a height control.
• No signal. via SCART. OK via SCART .
• Crackling audio. at low volume. (2000 tip from DEMOLUX)
• Frame cramped and rolling at switch ON.
• TR112 and T102 line output transformer both S/C. (20").
• No vertical synchronisation. Excessive vertical size. (with circuit diagram extract) (DEMOLUX - 2000 information)
• No 10V power supply on pin 15 and 16 of IP01. No signal on pin 14 of IP01. (part of circuit diagram displayed)
• No reception. No picture, no sound. Intermittently, carrier or picture appear then disappear straight away. Channel display ok. (picture attached)
• High contrast. (+ extract of circuit diagram)
• No vertical stability (sync). If left horizontal line appears after a few mins. (part of circuit diagram displayed) (2000 tips)
• 4" of distorted field scan.
• Standby LED flickers on a regular basis.
• No video with CPC464 computer.
• Vertical deflection is defective.
• Line collapse and burn damage.
• No reception.
• Tuning fault, skips channel numbers when operating the selection button.
• Intermittent breaks.
• No OSD. Tuning OK .
• Sound barely increases and programming menu does not appear.
• Ragged verticals at high brightness.
• Lacks 2cm in width. Flyback at top of picture. Chroma flashing. (+ extract of circuit diagram)
• No start-up. Standby LED lit . (part of circuit diagram displayed)
• Cramped field with low height.
• Impossible to change channels by RC. (extract of circuit diagram attached)
• Set intermittently displays a narrow, rippling picture.
• 1.6A fuse blows at switch on.
• Low HV.
• Poor synchronisation.
• No picture and sound is ok. Whistling of the power supply transformer. Dark screen becoming blue then pink. No OSD. (+ extract of circuit diagram)
• Dark picture. Audio OK . (extract of circuit diagram attached)
• Line foldover in centre; ringing and goes off tune. (service info for DEMOLUX -2000)
• Enter service mode.
• No start up. HT increases for 1 sec then stops, even standby. (extract of circuit diagram attached)
• Shuts down.
• Picture flashes on and off when first turned on.
• Loss of channel memory.
• No image content, HF noise only. (part of circuit diagram displayed)
• Mains fuse blows at switch on. No S/C. (with circuit diagram extract) (2000 tips)
• Cuts out when cold. Standby LED on front panel is lit. Occasionally picture returns by tapping towards HT mains, in black and white or in colour.
• Erratic functions.
• Height varies or intermittent field collapse.
• Replacement of integrated circuits by ST6392B1/TT.
• After a few mins starts to whine loudly and ragged picture. No adjustment of sound.
• Very slight hum in the speaker in standby.
• Transistor TP10 (S2000AB) fails after a few days.
• Picture covered in light, thin bands.
• Non-linear scan. Cramped in middle and stretched at top and bottom.
• Flyback lines with horizontally centered TXT underneath.
• Interference on channel 3 and channel 4.
• Line foldover in the middle of screen. Chrominance fault in B/W intermittently.
• No signal.
• Enable Hotel mode.
• No audio. after a few hours.
• Line transistor is defective. After replacement defective again after 5 min.
• Modification to prevent hum in standby mode.
• Line BU (BU508) becomes warm and blows. At base of BU there are double pulses.
• Excessive horizontal size. No horizontal synchronisation.
• Blue picture. Retrace lines.
• TXT lines through centre of picture.
• Cannot switch channels using keyboard and RC.
• Child lock key is indicated on screen.
• No +13V or +25V. Appliance starts up. (extract of circuit diagram attached)
• Picture is blue or red with flickering colours causing picture to flash. Picture OK when warm.
• Intermittent severe hum bars when warm.
• Bands moving upward. Line tearing.
• Ringing verticals. (2000 tip from DEMOLUX)
• PSU transistor blown.
• Vertical foldover. (service info for DEMOLUX -2000)
• White, bright image, image barely recognizable. (picture attached)
• No field sync when brightness increased.
• Bright line across screen. i.e frame cross point. (2000 DEMOLUX repair tip)
• Three inches in from left - "ghosts" (white lines).
• Intermittently whistle from the horizontal output stage.
• Reduced vertical size.
• Comes on for a short time.
• Channel selector switches are pushed in. (2000 DEMOLUX repair tip)
• Partial collapse of picture. Flashing lines at bottom of picture.
• A faint patch develops on the left hand side about half way down on a blue raster. This shows up as a slightly darker shade of blue, vertical lines on the left side bend around this patch.
• Unstable picture.
• Intermittent tuning drift, humbar or field roll.
• Down the centre of the screen are flyback lines with teletext lines below.
• Line tearing.
• Pink screen at start up then picture comes in black and white for 1 min.
• Intermittent signal. Weak signal.
• Noise bars.
• Apparent cut off lines and blue flashes.
• When teletext subtitles are present the brightness level falls. (+ extract of circuit diagram)
• Burning/fuse not blown.
• No image content, rainbow colour at upper edge. (with circuit diagram extract)
• Boundary lines on the top. (2000 tips)
• Three or more flyback lines at the top or bottom of the scan. (+ extract of circuit diagram)
• LED is red. No function from board or RCU.
• Vertical deflection defective. Dark picture.
• Vertical bar.
• No picture, just patterning.
• Black patch at the top of the picture.
• Whistling chopper transformer.
• 3 coloured lines on upper picture edge, if appliance is cold. (2000 tip from DEMOLUX)
• Slow start-up. when cold.
• Horizontal collapse.
• Red picture then blue or green on a black and white TV. No PB, sandcastle ok. Power supply correct. (part of circuit diagram displayed)
• Black screen. No audio. after warm-up.
• White raster with visible retrace lines. Pink raster when hot. OSD OK.
• Intense vertical white line in middle of the screen (N/S). (+ extract of circuit diagram)
• Four inches of distorted field scan.
• No picture. Blank raster (intermittently).
• Horizontal collapse. intermittently.
• Coloured horizontal lines over the screen. Black and white picture.
• No remote volume/colour.
• Partial frame collapse. Flickering lines at bottom of screen.
• TP01 (BUT12A) fails after longer operation while.
• Blank raster. No audio. (with circuit diagram extract)
• Teletext is missing and picture switches off and on.
• The channels have shifted 9 channels.
• No picture. in PB.
• 95V rail low and set-up potentiometer inoperative.
• Searches for channels continuously.
• Switches off by itself (at start-up).
• No channels.
• Intermittently trips when starting up. After starting up, frame frequency oscillates for a short while.
• Low sound centre of v/c. Sound falls off as v/ c increases.
• No tuning. Skips channel numbers when selector button is pressed.
• TP32 fails at switch on. (+ extract of circuit diagram)
• Band on picture
• Vertical foldover at top and bottom. (service info for DEMOLUX -2000)
• Vertical collapse (after warm-up).
• Vertical strips of shading that vary with brightness.
• Blown fuse FD702 (8A) on DC-DC converter board.
• Always comes on in standby. Could remove standby by remote or channel step. When on sound and picture ok.
• Vertical white line on the right side of the screen. (with circuit diagram extract)
• No OSD.
• S/C in line output transformer and transistor.
• Horizontal bar in middle of screen. (extract of circuit diagram attached)
• Top part of the picture is too wide and bottom part is too narrow.
• Bright line and slight line foldover on bright scenes only.
• Switches to standby. intermittently. (+ extract of circuit diagram)
• CTV does not start up. Standby LED on.
• Vertical lines at edge during EE operation and via AV. (with circuit diagram extract)
• Intermittently show at start up. In the channel adjustment menu, no access to the SECAM-PAL standard. Poor reception in TXT mode.
• White screen then flyback line and goes into safety mode. (part of circuit diagram displayed)
• Vertical size varies. Vertical bounce. Fault occurs intermittently. .
• Partial frame collapse. Top two thirds only and foldover.
• Distorted picture, buzzing from left hand side and intermittent colour.
• No functions.
• Intermittently dead.
• Picture has hum bars which also affect the colour.
• Tuning does not function, beat patterning from raster and simulated noises on audio. (DEMOLUX - 2000 information)
• When volume level is increased the sound crackles and the colour drops out.
• Field collapse or scan is reduced, severe non linearity.
• Picture size slightly diminished. (DEMOLUX - 2000 information)
• Field scan reduces to few ins then collapses after short time.
• "Lock" on the screen.
• Attempts to start up, then dead. LED lights up brightly for a moment, then dims slowly.
• Snow in picture. intermittently.
• No picture or faint picture if A1 advanced.
• S2000 fails after short while. (2000 tips)
• Picture is pulled at the top. Poor line sync. (with circuit diagram extract)
• Does not start up unless switch held in. Goes into standby when released. (service info for DEMOLUX -2000)
• Vertical collapse.
• Flyback lines. at top. (with circuit diagram extract)
• No start-up. Clicking noise. (with circuit diagram extract)
• No or poor audio.
• Trips. after a while. (service info for DEMOLUX -2000)
• Text on picture when warmed up. Only noticeable in top corner of screen (left).
• White screen. Blank screen. (+ extract of circuit diagram) (service info for DEMOLUX -2000)
• Vertical ripple.
• Vertical foldover. in the centre.
• Line foldover blowing line O/P transistor.
• Low brilliance (no b 1 clamp).
• Frame over scan.
• Line output transformer TX and TR S/C.
• No start-up (when cold).
• Crackling in the sound via the aerial and via scart. Speakers ok. (with circuit diagram extract)
• Patch missing from top of frame.
• Set won't power up unless the on/off switch is held on (PC1139) remote panel. (DEMOLUX - 2000 information)
• Slow start-up.
• Field collapse or partial collapse with no video information.
• Every 2 days S2000 fails without an obvious reason.
• Faint picture. Contrast and brightness controls inoperative.
• Production changes: tuner types.
• Line output transistor fails repeatedly.
• Only faint watery image when first anode increased.
• Frequency does not agree with the channel.
• Dead (intermittently).
• Hum bar present on picture going upwards.
• Foldover or frame cramp.
• Reduced vertical deflection. intermittently.
• Sound and picture are missing, slight line whistle.
• Tuning fault (channels jump continually, if the battery converter TA127 has a high ambient temperature).
• Screen goes red then intermittently becomes black. Fault occurs at switch on or after a few hours.
• No sound or picture (faint line whistle).
• At start up does not hold vertical stability. Everything returns to normal after a few moments. (+ extract of circuit diagram) (service info for DEMOLUX -2000)
• Vertical collapse (intermittently). (with circuit diagram extract)
• Occasionally picture is present by "flashes" and jumps but in black and white. No sound. When increasing volume, noise is present which varies with power. (with circuit diagram extract)
• Excessive horizontal size. at top. Reduced horizontal size. at bottom.
• No functions. Standby LED lit .
• Picture rolls.
• Switches to standby (at start-up).
• No VOL via RC.
• Snow in picture. Weak signal.
• Bright raster. Flyback lines. (+ extract of circuit diagram)
• After 10 mins picture disappears. (2000 tips)
• Picture is oversized on top and narrow at the bottom.
• Blanking.
• Low contrast.
• Green and red lines in upper part of screen.
• Slow line speed and appliance trips. (service info for DEMOLUX -2000)
• No HF, only appears intermittently like motor boating. OK in scart.
• Colourful stripes on upper picture edge.
• Weak signal. intermittently.
• Intermittently appliance remains in standby and brightness exaggerated.
• Signals are missing or gain low.
• Ripple effect on all vertical contents of picture; can be reduced by lowering the brightness or contrast level.
• No start-up from standby with RC.
• Poor horizontal synchronisation. Distorted picture. at top. (extract of circuit diagram attached)
• Flashover in picture on band I. (with circuit diagram extract)
• Dead. LED lit. . (DEMOLUX - 2000 information)
• No picture. Black screen. No RC functions. No front panel function. (picture attached)
• No video, not even in auxiliary. Appliance switches on like in video mode. Sound ok.
• TV switch on in standby with a slight hum in the sound but does not start up. DP21=123V but DP23=5V. (with circuit diagram extract)
• Chassis identification (2000 DEMOLUX repair tip)
• No picture. Dark screen, even when going via scart. Sound and display ok. (with circuit diagram extract) (service info for DEMOLUX -2000)
• Intermittent picture or snow. (with circuit diagram extract)
• No image on channel 99. (extract of circuit diagram attached)
• No start-up (intermittently). (picture attached)
• 12V rail is missing.
• No power supply. Mains, primary ok, line transformer seems ok. BU on the chassis seems poor but ok once removed. (with circuit diagram extract)
• Picture pumping slightly after the 33V are restored. (picture attached)
• Ripple on picture (more at top half.
• Unlocked colour.
• Line output transistor S/C, blows again on replacement.
• Cannot increase HT beyond 93V, cogging and bent verticals.
• Volume increases without a reason.
• Poor sync in computer mode.
• Low humm in vertical lines. (part of circuit diagram displayed)
• Only white vertical lines in centre of picture.
• Picture is poor and pale, contrast and brightness controls do not function.
• Intermittently picture rolls, once or twice per minute.
• Line wobbling.
• Mains hum, distorted scan, and gross purity errors.
• Vertical black line in centre when contrast is high.
• Random dot pattern (model MC01 when used with battery converter TA127A).
• Vertical line. in the centre.
• Cogging when warm.
• Text lines on ITV and CH4 only.
• Noise in picture.
• Drifting field hold.
• Tuning fault (No scan tuning forwards, backwards and memory ok). (2000 tips)
• Removing the case.
• Switches off by itself. Clicking noise.
• Whistling on line.
• Low HT, won't adjust with preset, verticals cog and bow, dependent on beam current.
• Blank raster (intermittently). Audio OK .
• Horizontal deflection is missing. Protective circuit disconnects. Standby-point blinks.
• Picture flickers slightly from bottom to top. (part of circuit diagram displayed)
• Power supply fault. (+ extract of circuit diagram)
• No horizontal deflection. Standby LED flashes .
• Memory is lost on channel 1.
• As sets warms up teletext lines start to show in top left hand side only.
• Very bright flyback lines. (service info for DEMOLUX -2000)
• Trips when brightness set low.
• Tuning lock.
• No 150V. Channel LED OK.
• Ripple on picture.
• No picture, no sound just fizzing noise and smell like a childs cap gun.
• Ripple on verticals.
• When first switched on sound produces a loud buzz, operation of volume control makes no difference and although the EHT present no raster.
• TXT lines visible.
• Reduced vertical and horizontal size. (2000 tip from DEMOLUX)
• Hiss in audio. at low volume.
• Reduced height. No sound, no picure and flyback lines.
• Only high channels. Normal channels don't synchronize.
• Does not switch to standby.
• Stripes in picture. Sound crackles. Intermittently no videotext.
• Pink screen at start up, then B/W picture. Picture OK after one minute.
• Dark picture. (extract of circuit diagram attached)
• No picture. Audio OK .
• Circuit IL01 (TDA8218). Loss of colour on some VHF or UHF channels. (with circuit diagram extract) (service info for DEMOLUX -2000)
• Vertical foldover. Vertical collapse. after a few minutes.
• Tripping. (picture attached)
• Low brightness. No colour. (+ extract of circuit diagram)
• Black area in top right hand corner of screen.
• Flyback blanking is defective. Flyback stripes. (2000 tip from DEMOLUX)
• Horizontal line.
• Dead. Slight noise coming from loudspeaker at start-up.
• No picture or sound. White screen (no snow) with flyback lines.
• When channels are changed the appliance trips.
• Flickering picture.
• Vertical roll. Poor synchronisation.
• Empty raster, slight pattern, no sound.
• Bright blue raster and flyback lines.
• 50Hz hums in the speaker in standby.
• Green picture.
• Picture starts 2 columns to left with Sinclair "QL".
• Trips with low brightness setting. (Only 20" appliances)
• No picture in scart input, sound is normal. Picture normal in scart output.
• Mains hum: distorted scan gross purity errors.
• On certain channels the text is distorted.
• No standby, no start up. 12V pulsates on pin 16 of power supply IC. 12V if point 16 lifted. (extract of circuit diagram attached)
• Cannot be switched on or switched to standby. Standby indicator does not light up. (2000 tip from DEMOLUX)
• Vertical deflection has collapsed to a bright line in the middle of the screen. (picture attached)
• Cannot store channels 1-8.
• Switches to protection mode. (picture attached)
• Fuse on the secondary side of the mains transformer blown.
• Channel 1 lights but set is dead and no sound/picture.
• Horizontal white line. Vertical fault.
• Random fuse blowing.
• Line down centre of screen only (line collapse)
• Horizontal foldover. at bottom.
• Switches off by itself. after a while.
• Picture stretched and cramped in centre.
• The appliance is dead (FS2 blown), reduced in height and has no sound.
• Poor audio.
• No colour; just faint blue cast.
• No field sync while line scanning suffers from jitter at the top of the picture only. (2000 tips)
• Vertical collapse following field drift.
• Clicking noise.
• Picture turns green or blue when changing channels. If you change channel again, picture is ok. (extract of circuit diagram attached)
• No audio (intermittently).
• Black screen. Audio OK .
• 95V rail is high and cannot be set up.
• Noisy power supply at switch on from cold. Appliance switches to standby. All is normal after 1 minute approx. (part of circuit diagram displayed)
• No TXT and picture going OFF/ON.
• Stuck in AV as if slow switching via scart. (+ extract of circuit diagram)
• No blue. (part of circuit diagram displayed)
• Field hold drifts then jittering/vertical collapse.
• Parts fitted (unknown) set still won't tune.
• Dead, at switch on standby LED on for a few secs. (picture attached)
• Ragged/tearing picture. Worse at high brightness.
• Intermittent colour. (part of circuit diagram displayed)
• High HT, HT control inoperative.
• Noise on channel 09 (Band I) - colour picture. (2000 tips)
• When selector button is used, programmes are skipped.
• No synchronisation. (with circuit diagram extract)
• Disable hotel mode. (DEMOLUX - 2000 information)
• Distorted field scan with excessive height.
• White screen. No image. No image content. No noise. (extract of circuit diagram attached)
• Horizontal jitter.
• At switch on LED comes on for a short time then everything goe off. (picture attached)
• Lines in picture. at top. (with circuit diagram extract)
• Poor vertical linearity.
• Blows main fuse on transformer. Line output transistor does not go s/circuit
• When volume is turned up the sound is lost.
• No picture. (extract of circuit diagram attached)
• Intermittently starts up or shuts down. (2000 tips)
• Dim picture. No brightness control. No contrast control.
• Vertical foldover at top.
• Low audio. (DEMOLUX - 2000 information)
• No picture, no sound and faint line whistle.
• 4 dotted lines on top half of picture from left to centre and right to centre.
• Feed resistor O/C.
• Cannot be switched on or switched to standby. Standby indicator does not light up. (DEMOLUX - 2000 information)
• Poor display.
• Smearing in picture. Ringing in picture.
• Dead. Clicking noise. (part of circuit diagram displayed) (2000 tip from DEMOLUX)
• No reception on band I, or image flickering only. (part of circuit diagram displayed)
• No 33V on point 4 of tuner. Ok in scart. (picture attached) (service info for DEMOLUX -2000)
• Ragged verticals more evident when picture bright.
• Small horizontal coloured lines over the whole screen and flickering. OK in black and white. (picture attached)
• Tuning drifts.
• TP01 (BUT12A) fails after operation while.
• Horizontal lines.
• Grainy picture on all channels.
• Starts up for a short time, then switches off. Standby LED lights for a short time. (service info for DEMOLUX -2000)
• Blocks in all functions after fitting the TXT board VT8004. Screen remains dark.
• Reduced height raster (no picture or sound).
• Snowy picture, channels 1 to 8 cannot be stored in memory, but 9 to 16 can.
• Several red, green and blue lines in upper picture part. Intermittently vertical stripe. After short switch off, picture is OK again.
• No signal (intermittently).
• Vertical collapse or linearity faults.
• Occasional collapse.
• No reception. in TXT.
• Scan is non linear, cramped at centre, top and bottom are stretched.
• Image poorly blue, no image content, flyback lines.. (extract of circuit diagram attached)
• Intermittent field roll (flips over 1-2 times a minute).
• Horizontal foldover (intermittently). (service info for DEMOLUX -2000)
• Loss of picture or loss of brightness and contrast (very faint colour). (+ extract of circuit diagram)
• Excessive vertical size.
• Occasionally field bounce and height varies.
• After approx 1 week IC902 loses its memory.
• No 95V on line output transistor.
• Incorrect line frequency.
• Poor picture. Negative picture.
• Poor synchronisation (after warm-up).
• Picture blanks out, parts of the screen go black or thick lines over picture (may take days for the fault to show).
• After turning up brightness and contrast, sound and synchronisation is lost.
• Line whistle.
• No raster.
• BUT12 S/C and TEA2261 blows, after replacing them, TV does not start up and sawtooth on TEA2261 pin 10, functions in pulses. (extract of circuit diagram attached)
• No RC functions.
• Rhythmic interruption of the picture, sound is correct. With the oscilloscope identical interruption of the video is noted on pin 6 of the IF module.
• On a very dark picture, very dark red vertical bar at the far right of the screen. (picture attached)
• TP01 (BUT12A) fails after longer operating time
• Low 95V rail and set-up potentiometer does not function.
• Snowy picture which does not vary even when changing channel.
• Partial vetical collapse and flickering lines at the bottom.
• Hum bar.
• U1 is instead of 84-90V only approx. 60V. Current uptake higher than 100W. (extract of circuit diagram attached)
• Picture is bright and white with flyback lines. (part of circuit diagram displayed) (2000 tips)
• No tuning. OSD OK . (extract of circuit diagram attached) (DEMOLUX - 2000 information)
• No horizontal deflection. (extract of circuit diagram attached)
• Flyback lines in the top part of the picture and IL01 (TDA8218) blows when warm. (+ extract of circuit diagram)
• Vertical foldover at bottom.
• Frame cramp after 5mins. TIP29 & TIP112 replaced.
• Missing video with CPC464 computer.
• Top of picture distorted. Incorrect linearity, 5cm horizontal line from top. Flickering colour.
• Dark picture and white bars with TDA8214B. (picture attached)
• No B drive. (extract of circuit diagram attached) (2000 tip from DEMOLUX)
• TP32 (BU508) and TL37 (BU508) fail immediately after switch on. (with circuit diagram extract)
• Severe line cogging.
• Severe cogging.
• HT rail is high, voltage cannot be reduced by the set HT potentiometer.
• No sweep tuning upward. Downward tuning and store function are OK.
• No picture, maybe no sound. Channel indicator OK.
• Distorted picture. (service info for DEMOLUX -2000)
• No picture sync when adjusting brightness and contrast.
• Picture fades.
• No synchronisation (after warm-up).
• TXT is muddled or missing.
• Coloured flyback lines and poor picture.
• Non linear and field cramp.
• No start function with RC. With mains switch appliance is set to standby. (with circuit diagram extract)
• No picture and no sound. CRT filaments lit.
• No sound. Bright horizontal line. (part of circuit diagram displayed)
• Loss of colour in Secam. (picture attached)
• Bright picture. Flyback lines. (2000 tip from DEMOLUX)
• No function possible, for the most part display is present on the screen.
• Standby LED is dark.
• The T9062V line driver transistor TR67 is short-circuit and the safety resistor R222 damages its collector circuit.
• No picture. No sound Channel indicator and channel change OK.
• No picture (after a few minutes).
• Failure of IC293. Loss of tuning memory.
• Picture pulsates between or snowy picture in tuner reception. Ok in scart. (2000 tips)
• Intense, vertical white line in middle of screen (N/S). Sound OK. (DEMOLUX - 2000 information)
• Corrugated ripple on vertical content.
• Loud hum, sounds like mains transformer being overloaded when first switched on. Picture present , no sound, only hum. After 1 minute set shuts down.
• No 12V rail. (DEMOLUX - 2000 information)
• Snow in picture. when cold.
• Set dead. 20".
• Drifting field hold, followed by jittering and field collapse.
• Lines at approx top 2 inches of picture.
• Text interference on ITV and CH4. (2000 tips)
• No function (preceded by bang).
• BUT12 S/C, fuse and TEA2261 defective. (picture attached)
• Vertical herringbone patterning which is most noticeable at very low contrast settings on 14" sets.
• Crackle on sound with volume at min. Ripple on picture.
• Picture flashes. Line amplitude reduced, flyback raster at the top. Weak EHT. Goes into safety mode when power supply voltage increased.
• Picture rolls. No picture. after a while.
• Verticals cog and bow with beam current variations.
• Cycles on/off. intermittently.
• No front panel function. RC OK.
• Top 1" of picture missing.
• No picture (intermittently). Audio OK .
• Colour fades after approx 30 mins.
• No channel display or tuning.
• No start-up from standby. (picture attached)
• Excessive HV.
• Reduced vertical deflection.
• Switches to protection mode (intermittently). (2000 tip from DEMOLUX)
• PSU attempts to start once. LED flashes briefly.
• Black and white TV with predominant red in the tuner and in scart. If you cut the colour, black and white is ok. (with circuit diagram extract)
• No picture, only snow (intermittently).
• TDA1170S frame chip keeps destroying itself.
• Jumpy, fuzzy picture.
• Picture has band, with tearing, that moves up the screen.
• Loss of sync and sound when brightness or contrast adjusted.
• No display. Poor sound adjustment and channel reception. (extract of circuit diagram attached)
• Cut-off adjustment.
• Reduced horizontal size. No colour. (picture attached)
• Enable child lock.
• Colours are displaced. Colour bleeding. (part of circuit diagram displayed)
• Power supply BUT12 S/C after replacement. No FBT, secondary power supply collapses. (+ extract of circuit diagram)
• Drop out in the sound muting and channel search during up and down program switching.
• Only partial picture with bottom foldover. (service info for DEMOLUX -2000)
• 3" white lines from left.
• Picture loss in horizontal strokes.
• Colour is ok at switch on then colours are unlocked then finally colour is lost.
• Raster is bright blue with flyback lines. (extract of circuit diagram attached)
• Stuck in standby. (with circuit diagram extract)
• Shuts down. after start-up.
• No field output.
• Hums when standby selected.
• Rolling picture with horizontal ripples.
• Intermittent white raster with flyback lines visible.
• No or jumbled TXT.
• No colour. (extract of circuit diagram attached)
• Red streaking across the picture.
• No sync. No sound when brilliance or contrast selected. (service info for DEMOLUX -2000)
• Distorted audio.
• Intermittently line break after shocks.
• No synchronisation (intermittently). (picture attached)
• Trips.
• Corrugated verticals.
• Vertical bar moving across picture.
• Tube overfeeds with flyback lines then appliance goes into safety mode.
• Shadows near white lines on the left.
• Too low image width, poor lines visible on screen. (part of circuit diagram displayed)
• Increase in the transfer rate of the tube after several hours. (+ extract of circuit diagram)
• Excessive brightness. intermittently.
• Intermittently pulses off then on again.
• Bad picture in HF. (with circuit diagram extract)
• Picture becomes snowy after 10 mins and sound cuts out or becomes poor. (picture attached)
• Field collapse superimposed on picture that almost vanishes after 5 mins.
• Insufficient height with small amount of foldover at top. (2000 DEMOLUX repair tip)
• Poor colour.
• Switches to standby. (extract of circuit diagram attached)
• Lines in picture. (part of circuit diagram displayed)
• Dead. Standby LED lit . (2000 tip from DEMOLUX)
• Vertical roll (intermittently).
• Intermittently, no chroma and no sound. Vertical white bar in the middle.
• No frame sync, line lock also critical.
• TEA2261, BUT12, RP01 (0R27) and RP03 (1K) blow at switch on.
• Horizontal deflection missing.Protective circuit disconnects. Standby point flashes.
• Frame cramp at top for approx. four to five mins.
• Dead. Channel display on .
• Intermittent failure.
• Sound goes up then fades as volume control is turned.
• No picture. Flyback line as if G2 had been pressed.
• Dark band with ringing at low contrast.
• Brightness varies.
• Picture and CRT heaters are missing. (picture attached)
• Bad ripple on the picture and hum on the sound.
• Pulsating picture and incorrect line frequency.
• Weak contrast.
• Line output stage whistle. (with circuit diagram extract)
• Lines in picture. at bottom. (picture attached)
• Dead. Faint line whistle.
• Will not indicate certain channels.
• Grainy picture.
• Sound on vision.
• Pattern of white lines over the picture from cold (like a beat pattern).
• Trips. depending on picture content.
• No channel display. No tuning. (extract of circuit diagram attached)
• Intermittently stuck in standby, especially if switched on when warm. (picture attached)
• Uneven verticals.
• Noise in the speaker in standby position. (picture attached) (2000 DEMOLUX repair tip)
• Weak contrast, low video and no sound.
• Line ragging and whistle.
• Vertical line crossing the screen.
• Colour drop out after an extended operating time. Identification between Pal and Secam is critical.
• No start up unless switch held in, goes into standby when released.
• No frame scan. Line in centre of picture.
• No synchronisation. Audio OK . (DEMOLUX - 2000 information)
• Image noise in upper channels (e.g. channel 60, 99). (picture attached)
• Loss of line lock when warmed up plus popping from speaker.
• No picture, only snow.
• RL24 burnt up.
• Sweep tuning does not function.
• Poor colour. No brightness. No contrast.
• Regulation problems.
• Picture scrolls, shakes and collapses.
• No image in UHF, voltage for band switching and adjustment OK. On UHF lines pin 10 approx. 8V. (with circuit diagram extract)
• Vertical jitter. Vertical roll. after a while. (service info for DEMOLUX -2000)
• No or intermittent picture. after start-up.
• Power supply hums in standby.
• Picture rolls. Buzz in audio.
• Intermittent picture or snow or white bands horizontally. No sound at all or jerky sound when RC is used. (picture attached)
• Picture blanking in top left hand corner.
• Picture hum and picture is slightly brighter at the top and bottom. (picture attached)
• Coloured lines. on upper half screen.
• Shuts down (intermittently). (part of circuit diagram displayed)
• No store of low channels.
• Slightly undersized picture.
• No image, red raster and visible flyback lines. (with circuit diagram extract)
• No picture, no sound. Line on screen. (2000 tips)
• Picture pulsing on/off. Line collapsing. Pulsing sound.
• Sound mute, no channel by manual controls (intermittent).
• Heavy line striations and low contrast. (2000 tip from DEMOLUX)
• Noise with drop out.
• No audio (via SCART).
• No sound, no picture. No raster scanning. Line transformer ok. (with circuit diagram extract)
• Picture/raster distorted.
• Ragged verticals.
• Noise at power up.
• Line speed off and field roll.
• Blanking fault (top 1-inch of the picture is missing).
• Hum bar on picture when brightness reduced. Pic rolling intermittent.
• Streaks in picture.
• Most of the time the top verticals are wavy.
• After line output transformer has been replaced A1 voltage is missing.
• No switch on. Standby power supply ok. Standby indicator lights up.
• Brightness level drops when TXT subtitles are displayed.
• Reduced vertical size (after a while).
• The appliance scans the top 2/3rds only and folds up.
• No or poor synchronisation. Audio OK .
• No channel storing. (DEMOLUX - 2000 information)
• CTV switches off every 5 minutes. CTV includes an alarm clock and if this is disconnected the CTV has the same problem.
• No picture (intermittently).
• Squealing from PSU. (with circuit diagram extract)
• No picture. Other functions OK .
• Excessive height with poor linearity, minimal effect on the height control.
• Picture bounces vertically. Sound blubbers.
• No vertical deflection.
• No switching in PAL. Aerial ok in both PAL and SECAM. (with circuit diagram extract)
• No contrast control. No brightness control. (extract of circuit diagram attached)
• Trips. when changing channels.
• Modification in production.
• No picture - faint, watery image obtained when first anode voltage increased.
• PSU pulsates.
• No power. (2000 tips)
• Top 4-5 inches of picture cramped.