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

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