CT2112 / DANSAI [TV 51 (47/48) cm picture]

• PSU repair tip.
• The 108V voltage varies (U-system). (CT2112 tip from DANSAI)
• No picture. Flyback lines. at top. Audio OK .
• No luminance.
• Unstable luminance when the appliance is warm.
• The appliance hums and the picture is unstable.
• No videotext mode.
• No high channels can be requested.
• Poor display.
• No brightness. Three RGB colour bands on left and right of the screen.
• Adjustment of 5.5MHz min. or 4.43MHz min.
• Is it possible to fit a TEA 2026C in place of a TEA 2026T ?
• Vertical deflection has collapsed to a bright line in the middle of the screen.
• PSU fails after start-up.
• No picture. Check the signal on pin 10 of IT20.
• No display. Appliance starts.
• Poor startup.
• No sensitivity in the tuning.
• The picture is delayed by a few minutes.
• Volume varies.
• Volume uncontrollable.
• Picture hum and picture is slightly brighter at the top and bottom. (extract of circuit diagram attached)
• When cold, no sound and no line amplitude then finally starts up.
• Horizontal centre adjustment.
• No picture. No audio. No channel display.
• Line stage does not start up.
• The channels unkey after a while.
• Rainbow effect in the centre.
• Station tuning disappears.
• No functions. Standby LED is not visible. (service info for DANSAI -CT2112)
• TL19 fails in line output stage. (DANSAI - CT2112 information)
• No system adjustment.
• The appliance takes 2-3 minutes to start up.
• Crackling in sound and picture in UHF and VHF. No sound in scart. (CT2112 tip from DANSAI)
• No reception. via tuner.
• RP11 blows.
• At start up 90V makes 12V. After 2 mins picture and sound present but 90V reaches a maximum at 85V. (CT2112 DANSAI repair tip)
• Contrast and colour are excessive at preset condition.
• Voltages from FBT gradually decrease then line BU S2000 blows after operating for 15 mins.
• TL19 fails in line ouptut stage.
• No start-up (intermittently). (part of circuit diagram displayed)
• PSU fails immediately after switch on.
• No colour. No shutdown with RC. (CT2112 tip from DANSAI)
• The fuse blows because RP02 heats up.
• U1 is instead of 84-90V only approx. 60V. Current consumption is over 100W.
• TP01 (BUT12A) fails after longer operating time
• Secondary protective circuit TV01 and TV02 disconnects intermittently.
• Excessive green.
• No reception at band I, or image flickering only. (part of circuit diagram displayed)
• Searches for channels continuously.
• Picture appears slowly.
• DP51 s/c after operating for half an hour.
• Standard CCETT adaptation.
• Image noise in upper channels (e.g. channel 60, 99) only. (picture attached)
• Vertical picture position shifts intermittently upwards approx 2 cm after switch on. It is OK after approx 10 mins.
• Distorted picture. Strong streaking.
• Power supply fault.
• When warm picture lifts from the bottom and narrows at the top, black lines at the bottom of the screen.
• No picture on channel 99.
• Cannot be switched on or switched to standby. Standby indicator does not light up.
• Vertical line.
• Sound to zero level. When volume is increased, sound goes back to zero level. Random channel switch-over.
• Systematic failure of TL54. At switch on TEA2026 has been changed.
• Cannot be switched on or switched to standby. Standby indicator does not light up.
• No U system.
• The varicap voltage does not move.
• The appliance blows up on a very light background.
• No transmission in UHF (12V on pin 10 of the tuner connector). (CT2112 tip from DANSAI)
• Adjusting Us= 108V.
• Appliance goes into PAL. Occasionally no display.
• TP32 (BU508) becomes defective after appliance turned ON/OFF several times. (part of circuit diagram displayed)
• Dead. (CT2112 tip from DANSAI)
• No picture. after a few minutes. Audio OK .
• When switching on BU508A and RP11 fail after 2 secs.
• RP51 (0R22) blows intermittently.
• No image, red raster and flyback lines visible. (extract of circuit diagram attached)
• After switch on, vertical centering is shifted intermittently upwards approx. 2 cm; it goes to normal position after approx. 10 minutes.
• Blank screen.
• No light and the appliance cuts out.
• There are 1300V present instead of 900V peak to peak on the collector of the TL37 (BU508ATB). This breaks after some time.
• Excessive brightness.
• Line stage does not start up.
• Adjusting the screen grid voltage (grey setting).
• Reluctant to start then produces a picture with reduced width.
• TP32 heats up.
• 90V problem. RP51 heats up and cuts out. DP51 and CP51 ok. Brand new line transformer.
• No vertical synchronisation.
• Dark screen. on the left.
• No start-up. Display OK .
• Vertical bar.
• Top part of the picture is too wide and bottom part is too narrow
• Vertical foldover at bottom.
• Adjusting the white setting.
• Slow start-up.
• Can not be switched on from standby via RC.
• Appliance does not function with the mains switch then starts up again with another button.
• The colour appears after a few minutes. (CT2112 DANSAI repair tip)
• Mains switch no start up. (extract of circuit diagram attached)
• Flyback lines. No brightness. No contrast. (CT2112 tips)
• Snow, no voltage on Varicap.
• The PSU fails instantly. When this is replaced by the repair kit the same problem arises.
• Power supply stops occasionally, approx after 1/2 hour (very irregular).
• Goes into standby every quarter of an hour or half an hour.
• Purity spot and scanning are incorrect.
• Power supply fails at less than 100V.
• Intermittent loss of sync. Blank raster. No audio. No LEDs.
• BU807 (TL54) cuts out.
• FBT ok at start up but dark screen except for 3 coloured lines in top third of screen. Sound and display of channels ok.
• Reduced horizontal size. (extract of circuit diagram attached)
• Power supply defective.
• Black band at bottom of screen over approx 8cm. Picture has shifted to the top.
• Switches to standby. after a few minutes.
• Crackling in sound and picture in UHF and VHF. No sound via scart.
• The line framing is incorrect. (DANSAI - CT2112 information)
• Wide dark stripes on left side of picture.
• Picture width fault. (CT2112 tip from DANSAI)
• E/W fault.
• TP32 in the PSU is s/c.
• S/C in PSU. (picture attached) (CT2112 DANSAI repair tip)
• RP23 and transistor (BU508A) have blown.
• Dark screen.
• Unstable lines and there is an interference line at the base of TP32.
• TP29 fails after switch on. (CT2112 tips)
• Line instability.
• Start up ok. Picture and sound ok. After 15 minutes or more than one hour no picture but son ok. Horizontal white line. (CT2112 DANSAI repair tip)
• Picture flickers slightly from bottom to top. After removing display indication (control unit) picture is ok (less current). (+ extract of circuit diagram)
• No switch on. Standby power supply ok. Standby indicator lights up.
• No speacial channels. Appliance works only up to channel 69. Display for brightness shows L (= English mode) instead of B.
• No start-up. (+ extract of circuit diagram)
• RP61 burns out.
• No display. TV functions well. Channel change over ok.
• Reduced vertical size.
• Picture predominantly red in SECAM. Ok in PAL via scart.
• When appliance is switched on mains BU fails immediately. (service info for DANSAI -CT2112)
• The picture shifts towards the bottom of the screen.
• Loss of sync/raster/sound. Display goes off.
• Fuse blows constantly.
• No colour (intermittently). Line tearing.
• Switches off intermittently or does not switch on at all.
• The power supply does not start up. No standby
• U Varicap = 20V and will not change.
• Sound is always at max even if appliance displays volume with 00.
• Starts to pulsates. Sound, picture and display present. (CT2112 tip from DANSAI)
• IR receiver does not function. (CT2112 DANSAI repair tip)
• Transistor BU508 fails repeatedly.
• When warm flickers between picture and TXT. Characters keep popping up on screen
• IL03 (TEA2026) blows up when the appliance goes into AV on TV 42cm.
• PAL run time decoder adjustment - PAL decoder.
• No horizontal deflection. intermittently.
• PSU does not always start after switch on via front control or RC.
• No picture. No sound. Programs can also be switched over.
• Does not switch on. No standby.
• TL54/TP32 are destroyed. (DANSAI - CT2112 information)
• Vertical centre adjustment.
• Switches to standby after 6 or 7 minutes with or without aerial signal. (DANSAI - CT2112 information)
• Normal in black and white. In chroma, red of picture is green, blue is red and green is blue.
• Picture too small. at start-up.
• No picture. Sound and display are OK.
• Programmes memory is lost once a month.
• Deprogrammes approx every 4 to 5 months.
• U1 = 60V instead of 90V.
• Power supply BU S2000 (BU508AT, BU508AF) S/C.
• Only switches on occasionally, but without picture and sound. Occasionally very high switch on current consumption.
• Faint blue picture with no picture content and flyback lines. (extract of circuit diagram attached)
• No command signal on the IL03.
• Snow in picture. in UHF.
• Screen blank. Dark picture.
• The appliance switches off for a short time and back on again. (with circuit diagram extract)
• PSU does not start up with a mains voltage more than 200V, ok with a voltage less than or equal to 200V.
• No colour, picture streaking.
• Black picture with 10cm of RGB horizontal lines over the whole screen.
• No picture, no sound and programme display does not light up.
• Too much contrast, cannot be adjusted to less. (+ extract of circuit diagram)
• No horizontal deflection.
• TP29 fails after start-up.
• Does not start up. Standby LED switches off.
• No RC functions.
• Standby indicator flashes.
• No video or scanning. Channels are displayed.
• Reference oscillator beat adjustment: PAL decoder.
• On channels from 21 to 27 picture is ok, from 32 to 35 lines on picture and from 41 to 47 no picture.
• Poor vertical synchronisation. Picture shifted vertically. at top. (extract of circuit diagram attached) (service info for DANSAI -CT2112)
• Focus adjustment.
• Dark picture. after a few minutes.
• Poor contacts.
• Switches to standby (intermittently).
• No start up. PSU blocked.
• No secondary voltage.
• Loud audio.
• The appliance crackles and the picture framing is incorrect.
• Coloured flyback lines and poor picture.
• Horizontal collapse.
• Channels from 21 to 32 come through well but with lines and nothing comes through from 41 to 53.
• No image content, only HF noise. (part of circuit diagram displayed)
• Power supply, fuses, BUs, etc, blow each time appliance is switched off by ON/OFF switch.
• The linearity coil whistles.
• Picture shifted vertically.
• High contrast.
• The appliance pulsates 3 times then goes to safety mode.
• Standby flickers.
• Sound purrs when tuning, picture is correct. Sound is possibly correct but picture disappears.
• Coloured tinge in picture.
• No start-up. No display.
• Switches to protection mode. (service info for DANSAI -CT2112)
• The power supply is correct without a load (U1 is up). There is a complete stop in the load.
• Does not memorise channel tuning. Display shows channel when TV tunes onto a programme. 'Ch' appears on display when pressing 'S' and channel number reappears.
• Vertical IC blows repeatedly after a few days. (CT2112 DANSAI repair tip)
• Fuse blows as soon as degaussing is connected.
• TP32 and TP38 have a short circuit. (CT2112 DANSAI repair tip)
• Lacks horizontal amplitude. Regulation does not function.
• Display appears after 15 secs, then pulsates on and off (no breaker circuit). (with circuit diagram extract)
• Horizontal stripe (intermittently).
• The power supply does not function with load.
• Switches to protection mode. after start-up. (with circuit diagram extract)
• The power supply does not start up. All transistors have been changed.
• Bright picture. at top and bottom.
• R82 (10R) on the tube base board fails.
• Vertical lines on edge in EE-mode and via AV.
• Low audio. (CT2112 tips)
• Poor picture alignment.
• Does not start up. Only displays the channel number. Power supply kit has been replaced.
• Does not come on from standby, red standby light comes on. TV01 and TV02 in the protective circuit respond.
• PSU inoperative. (service info for DANSAI -CT2112)
• BU807 blows regularly. FBT and TEA2026 have been changed.
• The blue circuit is pale.
• No function display. CTV functions via the front panel and the RCU.
• Screen blank, only RF-noise. No 0,5-30V tuning voltage at RT11. The three band switch transistors are conductive. Error may also occur only sometimes.
• Vertical amplitude is too low.
• No picture or sound. At switch on display indicates a channel but no control is possible.
• No picture content, rainbow colours at upper edge. U4 (17,5V) is too high, voltage at thyristor anode too high (approx 30V). At pin 4 of IC03 (TEA2026C) voltage is too high, instead of (2,8V approx. 7V).
• U7 = 15V and there is no 12V voltage. A black band appears on the screen.
• Sound and picture cut out, display for 30 secs.
• S2000 is s/c. Replaced with the original repair set, it still fails. (picture attached) (CT2112 DANSAI repair tip)
• Vertical lines at edge during EE operation and via AV. (extract of circuit diagram attached)
• Display ok, 90V, 13V and 22V are ok. Output 10 of TEA2026 to the line driver and the wave peaks are not in the correct frequency. IC and quartz have been changed.
• No 300V at collector of TP32. If collector is disconnected 300V appear.
• No start up or reset.
• No tuning.
• Slight hum of vertical bars.
• No 90V, RP51 burns. BU807, BU508.
• Standby LED flashes. (service info for DANSAI -CT2112)
• Dark screen, 5 or 6 coloured lines at the top of the screen. Picture returns if appliance is hit.
• Picture appears slowly. Display OK .
• Stations appear and disappear. Horizontal lines in picture.
• Displays PR and does not start
• No picture, no sound - PSU is switched off.
• No picture. Fusible resistor RP47 (0R22) in U2 13V-rail blows repeatedly.
• No brightness on picture. Chroma present with vertical instability and no sound. (CT2112 tip from DANSAI)
• No start up. PSU whistles even when secondary side disconnected.
• Does not start up when cold. Audio , display OK.
• No function, standby point is not visible.
• The picture is blurred (spot at the bottom of the screen).
• Fuse blows at random, even at switch off. (service info for DANSAI -CT2112)
• Channel storage is erased.
• No reception on band I, or only picture flickering.
• Dark picture.
• Insufficient picture width, poor lines visible on screen (service info for DANSAI -CT2112)
• 300V on the collector of TP32. Oscillates at its base but no voltage on the secondary.
• Secondary protective circuits TV01 and TV02 disconnect intermittently.
• PSU is defective, after replacing the protection resistor RP11 and transistor TP32 (BU508) there is still a s/c ie. after switching on appliance there is another complete s/c of the BU 508A straight away.
• Approx one third of the top of the picture is crushed.
• Line oscillating or tearing.
• No erasing possible.
• No picture. Vertical coloured lines. Raster problem.
• Switches to protection mode. intermittently. (DANSAI - CT2112 information)
• No scanning. Display ok.
• Excessive vertical size.
• Black screen. Display is lit. Intermittent sound. Fault occurs both via aerial and SCART.
• No brightness (only outlines can be recognised). Colour is ok.
• At start up no line scanning or raster, TV displays PR. After approx 30 mins TV starts up. (CT2112 tips)
• After switching on the mains progamme indication in the display but no picture and no sound. (part of circuit diagram displayed)
• Tuning voltage drifts.
• RP02 and power supply BU blow.
• Poor vertical and horizontal amplitude with slight waving at sides, when cold. Everything returns to normal within 5 mins.
• No start up. can be switched on after some time in standby. Sound OK.
• On start up, black interference lines appear then the screen is white.
• Hesitant start up. Mains button must be pressed several times. If appliance runs, fails again most of the time after a few mins.
• General information.
• Contrast average value is too high.
• Noisy sound or no sound at all.
• Focus pot is defective. (CT2112 DANSAI repair tip)
• Muted audio.
• Negative picture. Distorted picture. OK via SCART .
• Switched-mode power supply (SMPS) does not start up. (with circuit diagram extract)
• Power supply kit has been changed, has been working for 2 days and TP32 s/c, RP11 o/c, TL54 s/c, DL66 s/c, etc. Everything has been replaced, then no U1, U2, U3, U7, power supply transformer OK.
• Only switches on after 70 secs. After start up everything is ok.
• No functions. (+ extract of circuit diagram)
• No start-up from standby with RC.
• Shade appears behind the picture.
• Contrast and brightness cannot be adjusted properly. (part of circuit diagram displayed)
• Tripping.
• At switch on when cold picture is reduced in height and width of the screen. After heating up for some time scanning becomes normal. Fault is no longer visible. You must wait until TV has cooled down sufficiently.
• Power supply breakdown due to a volt-rise of the power supply kit.
• Intermittent loss of synchronization. (DANSAI - CT2112 information)
• Power supply fuse blows. When it has been replaced, TV functions again for several days.
• TL54 (BU807) becomes very hot after a few mins and blows. Normal picture.
• Vertical collapse (intermittently).
• Black band on one part of the screen and interference.
• No channel search.
• Horizontal deflection and line oscillator failed. (part of circuit diagram displayed)
• When switching into standby mode from the remote control the appliance switches off the sound and colour. This effect also occurs with a Condor appliance.
• No TXT.
• After changing the battery, how do you adjust the channels without remote control IR?
• Picture is dark. When Ug2 is completely there, a bit of the picture is present. (service info for DANSAI -CT2112)
• The appliance goes to safety mode and mute.
• Noise on channel 09 (band I) - colour picture. (extract of circuit diagram attached)
• No horizontal or vertical deflection.
• The luminance signal disappears occasionally.
• The appliance crackles during low Gamme UHF.
• Horizontal deflection is missing. Protective circuit disconnects. Standby point flashes.
• Picture is pulled at the top. Poor line sync. (picture attached)
• Poor line synchronisation. Picture is shifted up. (picture attached) (service info for DANSAI -CT2112)
• Picture flickers and stripes in the picture.
• The display is incorrect and PE appears.
• Tube lights up as if G2 is at max (as if blocked in video). The same if an oscilloscope is put into scart. Sound and scanning ok.
• Vertical lines are distorted horizontally. E/W equalizer can not be adjusted correctly.
• Power supply fault. TP37 and TP32 have a short circuit and occasionally TP38.
• DP51 heats up.
• Fails frequently when operating.
• Both vertical and horizontal synchronization instability.
• Phase comparator fault on TV. Ok on secondary. (CT2112 tips)
• Picture spraying on band I (heat dependent at DP51). (part of circuit diagram displayed)
• TP32 fails at switch on. (part of circuit diagram displayed) (DANSAI - CT2112 information)
• Picture is dark or partially ther.
• Ghosting effect.
• Channels below 30 cannot be received (chassis ICC4).
• Interference lines in the top part of the screen.
• Line output stage doesn't start up.
• Picture is bright and white with flyback lines. (part of circuit diagram displayed)
• No UHF channels.
• Image compressed horizontally. Insufficient width approx 1cm on left and right of screen.
• No adjustment.
• Vertical line. in the centre. (CT2112 DANSAI repair tip)
• Vertical blue bar on centre of screen. No picture.
• Poor reception. in VHF.
• Spots of colour on the screen.
• Replacement kit of thyristor ESM740/G1/G2. (DANSAI - CT2112 information)
• After a few days the TV fails. RP11, TP32 and TP38 are defective. The 925TX1283 unit has been replaced: TP32, TP38, CV16, DP33, DP41, DL62, DL64, QL11, CP31, DP32, DP38.
• White, bright picture, picture poorly distinguishable. (DANSAI - CT2112 information)
• The sound and picture hum.
• No vertical deflection.
• No vertical deflection. intermittently. No audio. intermittently. (DANSAI - CT2112 information)
• Setting the vertical amplitude.
• Very snowy picture in UHF. Apparently the fault is at the level of the tuner UHF 4200.
• No colour.Flag-effect.
• Poor vertical synchronisation.
• No search possible. TV switches off without the 10th, 20th and 30th channel.
• RL41 O/C due to dry joints below connector BD01.
• RP02 burns at switch on and destroys TP32 S2000A1.
• No start function via RC. With mains switch appliance switches into standby. (picture attached)
• TEA 2026C is defective.
• Line BU (BU508) becomes hot and blows. At base of BU there are double pulses.
• Intermittent loss of sync, a blank raster, no sound, switching to standby and the LED channel display going off. (CT2112 DANSAI repair tip)
• The power supply is destroyed.
• No picture in UHF, voltage for band change and tuning is OK.
• The picture blows up and the bottom of the screen is bright.
• Switches to standby. after a while.
• In normal charge, TP32 and TP38 switch off. The appliance functions without a charge.
• Starts up after 3 mins.
• Standby light flashes, fuse blows. RP11 and TP32, BU508 fails.
• TP32 (BU508) and TL37 (BU508) fail immediately after switch on. (picture attached)
• Low hum of vertical lines. (picture attached)