CTV2112 / AIKO [TV 51 (47/48) cm picture]

• Standby indicator flashes.
• The luminance signal disappears occasionally.
• The power supply is correct without a load (U1 is up). There is a complete stop in the load.
• Blank screen.
• Switches to protection mode. after start-up. (with circuit diagram extract)
• Picture appears slowly.
• U Varicap = 20V and will not change.
• No picture in UHF, voltage for band change and tuning is OK.
• Dark screen. on the left.
• PSU inoperative.
• No picture. after a few minutes. Audio OK .
• The power supply is destroyed.
• Does not come on from standby, red standby light comes on. TV01 and TV02 in the protective circuit respond.
• Does not start up when cold. Audio , display OK.
• Loud audio.
• Poor vertical and horizontal amplitude with slight waving at sides, when cold. Everything returns to normal within 5 mins.
• S/C in PSU. (part of circuit diagram displayed)
• Vertical lines are distorted horizontally. E/W equalizer can not be adjusted correctly. (CTV2112 AIKO repair tip)
• The appliance crackles during low Gamme UHF.
• No brightness on picture. Chroma present with vertical instability and no sound.
• 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.
• The blue circuit is pale.
• BU807 blows regularly. FBT and TEA2026 have been changed.
• Too much contrast, cannot be adjusted to less. (+ extract of circuit diagram)
• No erasing possible.
• U1 is instead of 84-90V only approx. 60V. Current consumption is over 100W.
• The 108V voltage varies (U-system).
• Fuse blows as soon as degaussing is connected.
• Reluctant to start then produces a picture with reduced width. (CTV2112 AIKO repair tip)
• 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.
• Horizontal deflection and line oscillator failed. (part of circuit diagram displayed) (CTV2112 tips)
• Approx one third of the top of the picture is crushed.
• Setting the vertical amplitude.
• Contrast average value is too high.
• Picture hum and picture is slightly brighter at the top and bottom. (part of circuit diagram displayed)
• Interference lines in the top part of the screen.
• Power supply breakdown due to a volt-rise of the power supply kit.
• Crackling in sound and picture in UHF and VHF. No sound in scart.
• Adjustment of 5.5MHz min. or 4.43MHz min.
• The power supply does not start up. All transistors have been changed.
• No search possible. TV switches off without the 10th, 20th and 30th channel.
• No functions. Standby LED is not visible.
• Black screen. Display is lit. Intermittent sound. Fault occurs both via aerial and SCART.
• Fails frequently when operating.
• Contrast and colour are excessive at preset condition.
• Crackling in sound and picture in UHF and VHF. No sound via scart. (CTV2112 AIKO repair tip)
• After changing the battery, how do you adjust the channels without remote control IR? (AIKO - CTV2112 information)
• Horizontal deflection is missing. Protective circuit disconnects. Standby point flashes.
• Standby flickers.
• Volume uncontrollable.
• Image noise in upper channels (e.g. channel 60, 99) only. (+ extract of circuit diagram) (CTV2112 AIKO repair tip)
• Dark picture. after a few minutes.
• Poor reception. in VHF.
• Wide dark stripes on left side of picture.
• General information.
• No high channels can be requested.
• No secondary voltage.
• TP32 (BU508) becomes defective after appliance turned ON/OFF several times. (extract of circuit diagram attached)
• Power supply defective.
• Picture is pulled at the top. Poor line sync. (with circuit diagram extract)
• The appliance goes to safety mode and mute.
• No display. Appliance starts.
• Adjusting the screen grid voltage (grey setting).
• Distorted picture. Strong streaking.
• Appliance does not function with the mains switch then starts up again with another button.
• Picture too small. at start-up.
• RP11 blows.
• No picture. No audio. No channel display.
• No brightness (only outlines can be recognised). Colour is ok.
• Picture shifted vertically.
• S2000 is s/c. Replaced with the original repair set, it still fails. (extract of circuit diagram attached)
• Muted audio.
• Standby light flashes, fuse blows. RP11 and TP32, BU508 fails.
• The power supply does not function with load.
• Vertical deflection has collapsed to a bright line in the middle of the screen.
• Poor picture alignment.
• Picture is dark. When Ug2 is completely there, a bit of the picture is present.
• Systematic failure of TL54. At switch on TEA2026 has been changed.
• TP29 fails after switch on. (CTV2112 tip from AIKO)
• Switches to standby after 6 or 7 minutes with or without aerial signal.
• Replacement kit of thyristor ESM740/G1/G2.
• Picture flickers slightly from bottom to top. After removing display indication (control unit) picture is ok (less current). (extract of circuit diagram attached)
• Switches to protection mode.
• Intermittent loss of synchronization.
• Line output stage doesn't start up.
• Vertical IC blows repeatedly after a few days.
• Power supply stops occasionally, approx after 1/2 hour (very irregular).
• Volume varies.
• The fuse blows because RP02 heats up.
• Standard CCETT adaptation.
• No start-up. (+ extract of circuit diagram)
• Unstable lines and there is an interference line at the base of TP32. (CTV2112 tip from AIKO)
• RP02 and power supply BU blow.
• No colour (intermittently). Line tearing.
• Noise on channel 09 (band I) - colour picture. (+ extract of circuit diagram)
• RP23 and transistor (BU508A) have blown.
• Rainbow effect in the centre.
• Reference oscillator beat adjustment: PAL decoder.
• Stations appear and disappear. Horizontal lines in picture.
• Adjusting the white setting. (service info for AIKO -CTV2112)
• DP51 s/c after operating for half an hour.
• Deprogrammes approx every 4 to 5 months.
• Vertical centre adjustment.
• No function display. CTV functions via the front panel and the RCU.
• 90V problem. RP51 heats up and cuts out. DP51 and CP51 ok. Brand new line transformer.
• No scanning. Display ok. (CTV2112 AIKO repair tip)
• Reduced vertical size.
• Coloured tinge in picture.
• The picture is delayed by a few minutes.
• TP32 heats up.
• TP32 and TP38 have a short circuit. (AIKO - CTV2112 information)
• RP61 burns out.
• The picture shifts towards the bottom of the screen. (service info for AIKO -CTV2112)
• No start-up. Display OK .
• Fuse blows at random, even at switch off.
• TL19 fails in line ouptut stage.
• Power supply fails at less than 100V.
• Appliance goes into PAL. Occasionally no display.
• Sound is always at max even if appliance displays volume with 00.
• White, bright picture, picture poorly distinguishable.
• The colour appears after a few minutes.
• PAL run time decoder adjustment - PAL decoder.
• Black band at bottom of screen over approx 8cm. Picture has shifted to the top.
• At start up no line scanning or raster, TV displays PR. After approx 30 mins TV starts up.
• No start-up from standby with RC.
• No picture. Flyback lines. at top. Audio OK .
• The varicap voltage does not move.
• Hesitant start up. Mains button must be pressed several times. If appliance runs, fails again most of the time after a few mins.
• Snow in picture. in UHF.
• Poor startup.
• Low audio. (service info for AIKO -CTV2112)
• The line framing is incorrect.
• 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.
• Picture predominantly red in SECAM. Ok in PAL via scart.
• TL54/TP32 are destroyed.
• No picture. No sound. Programs can also be switched over.
• No 300V at collector of TP32. If collector is disconnected 300V appear.
• Dark screen, 5 or 6 coloured lines at the top of the screen. Picture returns if appliance is hit.
• 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.
• Switched-mode power supply (SMPS) does not start up. (picture attached)
• 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.
• Ghosting effect.
• Reduced horizontal size. (+ extract of circuit diagram)
• Cannot be switched on or switched to standby. Standby indicator does not light up.
• The picture is blurred (spot at the bottom of the screen).
• Vertical picture position shifts intermittently upwards approx 2 cm after switch on. It is OK after approx 10 mins. (CTV2112 tips)
• Focus pot is defective. (CTV2112 AIKO repair tip)
• Standby LED flashes.
• Dead.
• R82 (10R) on the tube base board fails.
• Line oscillating or tearing.
• No tuning.
• BU807 (TL54) cuts out.
• No image, red raster and flyback lines visible. (picture attached)
• Start up ok. Picture and sound ok. After 15 minutes or more than one hour no picture but son ok. Horizontal white line. (CTV2112 AIKO repair tip)
• The display is incorrect and PE appears.
• Secondary protective circuits TV01 and TV02 disconnect intermittently.
• No horizontal deflection. (service info for AIKO -CTV2112)
• No transmission in UHF (12V on pin 10 of the tuner connector).
• At start up 90V makes 12V. After 2 mins picture and sound present but 90V reaches a maximum at 85V.
• Screen blank. Dark picture.
• No start up. PSU whistles even when secondary side disconnected.
• No luminance.
• When warm picture lifts from the bottom and narrows at the top, black lines at the bottom of the screen.
• PSU fails after start-up.
• No colour, picture streaking.
• Excessive green.
• Switches off intermittently or does not switch on at all.
• Starts to pulsates. Sound, picture and display present.
• Noisy sound or no sound at all.
• Power supply BU S2000 (BU508AT, BU508AF) S/C.
• No light and the appliance cuts out.
• No vertical deflection. intermittently. No audio. intermittently.
• Black band on one part of the screen and interference. (CTV2112 AIKO repair tip)
• Switches to standby (intermittently).
• Vertical foldover at bottom. (CTV2112 AIKO repair tip)
• Power supply fault. TP37 and TP32 have a short circuit and occasionally TP38.
• 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).
• Both vertical and horizontal synchronization instability.
• No picture. Fusible resistor RP47 (0R22) in U2 13V-rail blows repeatedly.
• Mains switch no start up. (extract of circuit diagram attached)
• TP01 (BUT12A) fails after longer operating time (CTV2112 tips)
• Poor vertical synchronisation. Picture shifted vertically. at top. (picture attached)
• Intermittent loss of sync. Blank raster. No audio. No LEDs.
• TP29 fails after start-up.
• No colour. No shutdown with RC.
• No display. TV functions well. Channel change over ok.
• Dark picture.
• Power supply, fuses, BUs, etc, blow each time appliance is switched off by ON/OFF switch.
• Vertical bar.
• No reception on band I, or only picture flickering. (CTV2112 tips)
• Line instability.
• Does not start up. Only displays the channel number. Power supply kit has been replaced.
• No start function via RC. With mains switch appliance switches into standby. (picture attached)
• No sensitivity in the tuning.
• No UHF channels.
• Picture flickers and stripes in the picture.
• Voltages from FBT gradually decrease then line BU S2000 blows after operating for 15 mins.
• Unstable luminance when the appliance is warm.
• The sound and picture hum.
• FBT ok at start up but dark screen except for 3 coloured lines in top third of screen. Sound and display of channels ok.
• In normal charge, TP32 and TP38 switch off. The appliance functions without a charge.
• Vertical lines at edge during EE operation and via AV. (+ extract of circuit diagram)
• Sound and picture cut out, display for 30 secs.
• Horizontal stripe (intermittently).
• After switch on, vertical centering is shifted intermittently upwards approx. 2 cm; it goes to normal position after approx. 10 minutes.
• Poor contacts.
• No start up. can be switched on after some time in standby. Sound OK.
• No speacial channels. Appliance works only up to channel 69. Display for brightness shows L (= English mode) instead of B.
• No start-up. No display.
• No picture or sound. At switch on display indicates a channel but no control is possible.
• TL19 fails in line output stage.
• RP02 burns at switch on and destroys TP32 S2000A1.
• No start-up (intermittently). (picture attached)
• Poor vertical synchronisation.
• No switch on. Standby power supply ok. Standby indicator lights up.
• When switching on BU508A and RP11 fail after 2 secs.
• Bright picture. at top and bottom.
• No videotext mode.
• Low hum of vertical lines. (part of circuit diagram displayed)
• Poor line synchronisation. Picture is shifted up. (extract of circuit diagram attached)
• No picture. Vertical coloured lines. Raster problem.
• Channels below 30 cannot be received (chassis ICC4).
• No start up. PSU blocked.
• DP51 heats up.
• After switching on the mains progamme indication in the display but no picture and no sound. (with circuit diagram extract)
• No vertical deflection. (CTV2112 tip from AIKO)
• The PSU fails instantly. When this is replaced by the repair kit the same problem arises.
• Display appears after 15 secs, then pulsates on and off (no breaker circuit). (picture attached)
• Contrast and brightness cannot be adjusted properly. (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.
• U1 = 60V instead of 90V.
• Image compressed horizontally. Insufficient width approx 1cm on left and right of screen.
• Picture is bright and white with flyback lines. (+ extract of circuit diagram)
• Switches to standby. after a few minutes.
• Channels from 21 to 32 come through well but with lines and nothing comes through from 41 to 53.
• Vertical amplitude is too low.
• Goes into standby every quarter of an hour or half an hour.
• Is it possible to fit a TEA 2026C in place of a TEA 2026T ? (AIKO - CTV2112 information)
• No video or scanning. Channels are displayed.
• The appliance pulsates 3 times then goes to safety mode.
• No picture, no sound and programme display does not light up.
• Fuse blows constantly.
• No RC functions. (CTV2112 AIKO repair tip)
• IL03 (TEA2026) blows up when the appliance goes into AV on TV 42cm.
• 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.
• The power supply does not start up. No standby
• Horizontal centre adjustment.
• Vertical line. in the centre.
• Only switches on occasionally, but without picture and sound. Occasionally very high switch on current consumption.
• No vertical synchronisation. (AIKO - CTV2112 information)
• Top part of the picture is too wide and bottom part is too narrow (CTV2112 tip from AIKO)
• Does not switch on. No standby.
• Vertical line.
• Can not be switched on from standby via RC.
• RP51 (0R22) blows intermittently.
• Picture spraying on band I (heat dependent at DP51). (extract of circuit diagram attached)
• No picture. Check the signal on pin 10 of IT20.
• Cannot be switched on or switched to standby. Standby indicator does not light up.
• No reception. via tuner.
• Line BU (BU508) becomes hot and blows. At base of BU there are double pulses.
• Transistor BU508 fails repeatedly.
• Secondary protective circuit TV01 and TV02 disconnects intermittently.
• There are 1300V present instead of 900V peak to peak on the collector of the TL37 (BU508ATB). This breaks after some time.
• Insufficient picture width, poor lines visible on screen
• When cold, no sound and no line amplitude then finally starts up.
• IR receiver does not function.
• Line stage does not start up.
• The picture blows up and the bottom of the screen is bright.
• Coloured flyback lines and poor picture. (CTV2112 tip from AIKO)
• Poor display.
• Excessive vertical size.
• No 90V, RP51 burns. BU807, BU508.
• No horizontal deflection. intermittently.
• Loss of sync/raster/sound. Display goes off.
• Tuning voltage drifts. (CTV2112 tip from AIKO)
• Station tuning disappears.
• On start up, black interference lines appear then the screen is white.
• 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. (CTV2112 AIKO repair tip)
• No reception at band I, or image flickering only. (+ extract of circuit diagram)
• Does not start up. Standby LED switches off.
• Purity spot and scanning are incorrect.
• Spots of colour on the screen.
• PSU does not always start after switch on via front control or RC.
• TEA 2026C is defective.
• 300V on the collector of TP32. Oscillates at its base but no voltage on the secondary.
• When warm flickers between picture and TXT. Characters keep popping up on screen (AIKO - CTV2112 information)
• No image content, only HF noise. (+ extract of circuit diagram)
• The channels unkey after a while. (CTV2112 tips)
• No colour.Flag-effect. (CTV2112 tip from AIKO)
• No channel search.
• Faint blue picture with no picture content and flyback lines. (part of circuit diagram displayed)
• Focus adjustment.
• No functions. (part of circuit diagram displayed) (service info for AIKO -CTV2112)
• TP32 (BU508) and TL37 (BU508) fail immediately after switch on. (with circuit diagram extract)
• No horizontal or vertical deflection.
• Black picture with 10cm of RGB horizontal lines over the whole screen.
• Displays PR and does not start
• Snow, no voltage on Varicap.
• Adjusting Us= 108V.
• No adjustment. (service info for AIKO -CTV2112)
• No picture. Sound and display are OK.
• Vertical blue bar on centre of screen. No picture.
• PSU fails immediately after switch on.
• Line stage does not start up. (AIKO - CTV2112 information)
• Phase comparator fault on TV. Ok on secondary. (CTV2112 AIKO repair tip)
• Normal in black and white. In chroma, red of picture is green, blue is red and green is blue.
• Sound to zero level. When volume is increased, sound goes back to zero level. Random channel switch-over.
• TP32 in the PSU is s/c.
• PSU repair tip.
• Horizontal collapse.
• Switches to protection mode. intermittently.
• The appliance switches off for a short time and back on again. (+ extract of circuit diagram)
• Channel storage is erased. (CTV2112 tip from AIKO)
• The appliance hums and the picture is unstable.
• Starts up after 3 mins.
• Picture appears slowly. Display OK .
• Switches to standby. after a while.
• Programmes memory is lost once a month.
• No system adjustment.
• When appliance is switched on mains BU fails immediately.
• No command signal on the IL03.
• Power supply fault.
• TL54 (BU807) becomes very hot after a few mins and blows. Normal picture.
• Lacks horizontal amplitude. Regulation does not function.
• No picture on channel 99.
• The appliance takes 2-3 minutes to start up.
• U7 = 15V and there is no 12V voltage. A black band appears on the screen.
• No brightness. Three RGB colour bands on left and right of the screen.
• Power supply fuse blows. When it has been replaced, TV functions again for several days.
• Picture width fault.
• E/W fault.
• RL41 O/C due to dry joints below connector BD01. (CTV2112 AIKO repair tip)
• The appliance crackles and the picture framing is incorrect. (AIKO - CTV2112 information)
• Flyback lines. No brightness. No contrast.
• No start up or reset.
• Intermittent loss of sync, a blank raster, no sound, switching to standby and the LED channel display going off.
• Excessive brightness.
• High contrast.
• No TXT. (AIKO - CTV2112 information)
• No U system.
• Slight hum of vertical bars.
• The linearity coil whistles.
• Vertical collapse (intermittently).
• Very snowy picture in UHF. Apparently the fault is at the level of the tuner UHF 4200. (CTV2112 tip from AIKO)
• Searches for channels continuously.
• 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.
• Negative picture. Distorted picture. OK via SCART .
• 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. (AIKO - CTV2112 information)
• Vertical lines on edge in EE-mode and via AV.
• TP32 fails at switch on. (extract of circuit diagram attached)
• Dark screen.
• No function, standby point is not visible.
• Shade appears behind the picture.
• Sound purrs when tuning, picture is correct. Sound is possibly correct but picture disappears.
• Tripping.
• Slow start-up.
• Only switches on after 70 secs. After start up everything is ok.
• On channels from 21 to 27 picture is ok, from 32 to 35 lines on picture and from 41 to 47 no picture.
• Picture is dark or partially ther.
• The appliance blows up on a very light background.
• No picture, no sound - PSU is switched off.