CTV1481RT / DANSAI [TV (Standard)]

• No vertical deflection when increasing voltage on CRT accelerator anode (G2). Sound ok.
• No voltage on +12V line.
• Height is reduced and tuning unstable. (DANSAI - CTV1481RT information)
• Horizontal lines. (CTV1481RT DANSAI repair tip)
• Blackened fuse.
• Not storing. (CTV1481RT tips)
• Unable to adjust cut off point of the three guns (red, green or blue) of CRT.
• No picture, or only one colour.
• Tripping. intermittently.
• No synchronisation. High contrast.
• Reduced vertical deflection. Blank raster.
• No power on AC.
• Switches to standby (intermittently).
• Vertical black line on left side.
• Striations.
• Noisy and/or spotty picture.
• Set would not come on from standby via the remote control.(It will start if precise action was applied to the mains switch).
• Control buttons.
• Tries to start then shuts down. Cannot be run on dummy load.
• Picture shifted.
• Defective vertical frequency.
• Excessive brightness. Flyback lines.
• Super sandcastle.
• Humbar on vertical scan.
• No functions. Intermittently standby LED appears.
• IF jungle IC100. TDA4505 and TDA8305.
• System not returning to TXT mode.
• Intermittent loss of power.
• No text only mix mode.
• Bright raster. Flyback lines.
• Switches to standby.
• One colour flashing or full on.
• Audio.
• Shuts down (intermittently).
• No channel display and no sound or vision. Brightness can be obtained by slightly advancing the setting of the first anode control.
• Trips.
• No raster. at start-up.
• No raster. No audio. Display OK .
• Horizontal pulse section of the super sandcastle oscillogram is incorrect.
• Dead with two little bars on the display.
• Appliance switches to standby and then back on when the channel is changed. (CTV1481RT DANSAI repair tip)
• Returns to TXT but with floating header. (service info for DANSAI -CTV1481RT)
• Dead or poor power up.
• No display or functions.
• Intermittently dead.
• Dead. Standby LED lit .
• Goes dead with a flash and puff of smoke.
• Goes to TXT mode but no data on screen.
• Distorted audio.
• No picture.
• Bright, blank raster.
• Does not enter TXT mode.
• No output from pin 26 of horizontal oscillator.
• No vertical drive signal at pin 3 of IC100.
• HT too high at switch on and drifts down when set has warmed up.
• Picture disappears after a few secs or does not appear at all.
• Stuck in standby.
• No function of IC300 or corruption of IC301. Shows as going into standby.
• Incorrect functions.
• One colour, blue, full on.
• Q800 S/C.
• No brightness control.
• Low gain.
• Tripping at 1Hz, chirping sound.
• Travelling humbar on right of screen. Visible from bottom of screen to approx 1/2 way up.
• Horizontal output transistor shorts at switch on.
• Colour flashes over black and white picture intermittently.
• No picture. Blank raster. Audio OK .
• Low audio.
• Width slightly low with black band on right hand side.
• Goes to TXT but appears negative.
• Blank raster. at start-up. TXT OK .
• Vertical collapse.
• Bad patterning and picture foldover in middle of raster. (CTV1481RT tips)
• Blank, grey raster. Audio OK.
• Cannot set all cut offs.
• Power supply.
• Occasionally dead with no channel display or goes to standby. (CTV1481RT tips)
• Set displays CH but unable to reprogram memory chip. (CTV1481RT tips)
• Flashing picture.
• Vertical output IC400 (TDA3653).
• Q801 and R816 fails repeatedly.
• Intermittent standby. (CTV1481RT tips)
• Cannot set one gun cut off.
• Blank screen (intermittently).
• After a few minutes the display sticks on one channel usually AV and refuses to perform any other functions.
• No RC functions.
• Starts only after several tries.
• Poor sync and excessive gain on picture.
• Intermittently blank screen or thin lines, one colour
• Squealing from PSU. Trips.
• One of user controls (contrast, brightness or colour) is defective.
• No operation.
• No colour.
• No volume, contrast, brightness and saturation functions.
• Set displays CH when switched on.
• Insufficient height, needs retuning.
• Incorrect functions. No tuning.
• One of primary colours (RGB) is missing.
• Low height, no picture unless A1 turned up, no tuning function.
• No EHT. No picture. Sound OK.
• Uncontrollable HT.
• Dark vertical line at right hand side of picture.
• No standby via RC.
• Switches to standby. after a few minutes.
• Intermittent. Won't come on/goes light/dark.
• Picture suddenly goes bright and smeary.
• Flickering picture.
• Stripes on left side, plus smearing.
• Colour decoder TXT (TDA3561A).
• AGC fault, overloaded picture.
• Fizzing or squealing from the chopper transformer at switch on, possibly dying away after a few minutes or alternatively continuing for much longer, accompanied by fine tearing of verticals in the picture.
• No EHV.
• Black, horizontal lines drifting down screen.
• No functions, display stuck.
• Dead sometimes comes on if switched on and off a few times. (DANSAI - CTV1481RT information)
• Colour decoder, non TXT (TDA3565).
• Vertical oscillator, no output.
• Line frequency incorrect.
• Unable to adjust cut off point of one of the three guns (red, green or blue) of CRT.
• No start-up. intermittently.
• No or low energy output.
• Line transistor S/C, fuseable resistor R811 is O/C.
• No start up, one pulse every 300ms at pin 7.
• No picture. No sound. Display flickers when TV is switched off. (service info for DANSAI -CTV1481RT)
• Audio output.
• Dark picture with brightness control at maximum.
• Tuning point shifted.
• Red raster.
• Tuning drifts.
• Amplitude faults (super sandcastle pulses shape).
• Comes on with bright green screen.
• Vertical frequency incorrect.
• Brightness changes.
• Raster too wide/narrow. (CTV1481RT tips)
• Picture foldover in middle of raster.
• Line pairing and vertical jitters.
• Tripping.
• Dead. (DANSAI - CTV1481RT information)
• Tuner.
• Fast hiccuping.
• Picture tearing and PSU squeals.
• Excessive bright screen with only one colour (often blue).
• Picture stretched in centre otherwise OK.
• Missing picture or sound and no channel display. Raster displayed if A1 control advanced.
• Set starts up and works for days or does not work at all. (CTV1481RT tips)
• Reduced vertical and horizontal size. (service info for DANSAI -CTV1481RT)
• Excessive bright screen with only one colour (often blue). Intermittent fault with colour pulses shape.
• Hum in audio.
• Dead. Starts after 5 mins. (service info for DANSAI -CTV1481RT)
• Horizontal output, no EHT.
• New CRT has been fitted.
• Corrupt TXT.
• Striations on right hand side.
• Picture is too bright or too dark.
• Super sandcastle.
• Field collapse or part scan.
• Some front panel buttons do not function.
• Dead. No picture. Frame collapse produced by advancing screen voltage.
• No vertical synchronisation. Reduced horizontal size.
• Intermittent failure to switch on.
• No energy transferred, but 20ms bursts of pulses.
• Low/ high EHT.
• Line frequency drift.
• Defective band switching (I, III, UHF).
• CRT base.
• Not starting up. No pulses at pin 7.
• Picture shifted to one side. Line phase out.
• Switches on OK but cannot change channel, volume, etc.
• RC handset.
• EHT low.
• Q800 overheats.
• Poor vertical linearity.
• TXT lines at top of picture.
• Negative picture. Appliance switches to TXT mode. (CTV1481RT tip from DANSAI)
• Insufficient picture height and loss of original tuning of the stations. (CTV1481RT tips)
• Destruction of line output stage. (CTV1481RT tips)
• Line phasing or picture shift incorrect.
• No signal at base of horizontal drive transistor.
• Unwilling to power up intermittently. (DANSAI - CTV1481RT information)
• Sometimes stops working or switches to standby.
• Intermittent destruction of power supply components.
• Set dead. Channel 3 showing in display. (DANSAI - CTV1481RT information)
• No field linearity.
• Horizontal instability at switch on from cold. Fault disappears when warm.
• No start up. Stand-by light on.
• No audio.
• No operation. intermittently.
• Vision buzz in audio.
• Modification to replace TDA4505 with TDA8305.
• Intermittent raster and red line.
• Switches to standby intermittently and remains stuck in that mode.
• Appliance is dead. When standby selected on RCU relay operates.
• No picture. No vertical deflection.
• F800 blown.
• Goes to TXT but frame jitters.
• No output, RC.
• Switches off after a few minutes, no channel indicator.
• Picture jitters vertically and horizontal deflection line pairing (two by two).
• Dead, intermittent to start with.
• No picture. at start-up.
• Horizontal driver, no output.
• Grainy picture.
• No functions.
• Horizontal stages.
• Switches to standby by itselt usually on channel change.
• AGC control, picture overload.
• Defective picture horizontal centering (incorrect operation of horizontal phase control).
• Audio IF.
• No picture. Audio OK .
• Blank raster with black bars on picture.
• Intermittent standby. Starts up and work for days.
• Stuck on one channel, no remote control operation and no response from the set's on-board controls. (CTV1481RT DANSAI repair tip)
• No field drive. Field collapse.
• Dead, standby LED lit.
• No start-up.
• Picture shifted vertically. Unable to adjust it to the correct position.
• Full frame collapse.
• No line drive.
• No vertical deflection on bottom part of CRT screen.
• Lines in picture. at top .
• Snow in picture.
• Dark screen.
• Raster wide/narrow. (service info for DANSAI -CTV1481RT)
• Unable to store data in memory. Correct display indication.
• Noisy picture and or video smearing.
• Centre fram cramp.
• The appliance is dead but will start if you hold in switch so start contacts are made.
• Ragged verticals. (CTV1481RT tip from DANSAI)
• AFC control. Tuning drift.
• Blank raster.
• No synchronisation.
• Blank screen. Reduced vertical size. (CTV1481RT tip from DANSAI)
• Slow start-up.
• Two or three buttons not operating.
• Stuck in standby. intermittently.
• Front control operation incorrect.
• TXT lines on picture. Cramping at top.
• No EHT. Sound OK.
• Switches on from cold, but will not switch back on from warm.