CTV70100 / INTERVISION [TV (Standard)]

• Intermittent audio.
• Reduced horizontal size.
• Vertical collapse. (with circuit diagram extract)
• RC doesn't function. Geometry changes.
• Line transistor is dead.
• No audio. Picture OK . (picture attached)
• No picture. No OSD. Audio OK .
• HV builds up and then switches off again
• Enter service mode.
• Noise at stereo. (CTV70100 INTERVISION repair tip)
• Poor picture. Vertical jitter, lines run diagonally through the picture.
• Dark picture. (picture attached)
• Line output transistor fails repeatedly (after a few minutes).
• Blocks intermittently and no operation via RC and control panel
• Picture becomes darker after approx 3 mins, only poorly visible contours. Sound OK.
• No audio (intermittently).
• Left or right speaker fail intermittently.
• Wavy vertical lines across the entire picture, in particular on the right hand side edge, but can be across the entire picture and waves fluctuate.
• No sound via SCART. No VDS (Virtual Dolby Surround) menu. Sound via tuner OK.
• Insufficient picture height. Approx 2cm missing at the top and bottom.
• Sound drops spontaneously out and "Mono" OSD appears on screen. Sound missing for a while, then ok again.
• Overdriven picture, severe red streaking depending on the picture signal. Reddish horizontal lines and white horizontal lines during crosshatch pattern.
• No picture. Excessive brightness. OSD and TXT OK .
• Disable child lock.
• Bright raster. Audio OK . (picture attached)
• Sound becomes intermittently quieter or fails completely. Fault reacts to chassis movement.
• Model release/pricing information.
• Picture has shifted.
• Attempts to start up but keeps switching back to standby.
• Poor synchronisation. Picture rolls.
• Horizontal stripe. (+ extract of circuit diagram)
• No picture. Audio OK . (picture attached)
• Comes on for a short time. (+ extract of circuit diagram)
• Line tearing. E/W fault.
• Switches to standby (intermittently). Knock sensitive. (CTV70100 tips)
• Voltage for tubular heating fails. (with circuit diagram extract)
• Horizontal indented lines that become narrower towards the bottom approx 7cm at the top. (with circuit diagram extract)
• Dark picture. Horizontal roll. (extract of circuit diagram attached) (service info for INTERVISION -CTV70100)
• No raster.
• Line transistor becomes very hot.
• No vertical deflection. (part of circuit diagram displayed)
• No or intermittent start-up. Knock sensitive.
• E/W fault, strong indentation. (part of circuit diagram displayed)
• Stripes in lower half of picture, which become stronger after warming up. (picture attached) (CTV70100 tips)
• Dead. LED lights up for a short time after start-up and then switches off.
• E/W fault. Appliance does not switch off, picture can be observed.
• No picture content. No geometry data and no RC.
• Horizontal lines.
• No picture. intermittently. Audio OK .
• Standby display flashes briefly then goes off. (extract of circuit diagram attached)
• E/W fault. Excessive vertical size.
• Volume varies.
• PSU chirps. (extract of circuit diagram attached)
• Starts normally via mains switch. But switches suddenly in standby when pressing any key on RC.
• G2 adjustment.
• Standby switches briefly on. Brief crackle from the DST when LED is on, is repeated every 5 sec.
• Sound disappears after a few minute, sound reappears after programme change for a few minutes when no control, switches to standby.
• No picture, no sound. LED changes constantly from green to red.
• Black screen. Audio OK . (with circuit diagram extract)
• Line ragging. Popping sound from line output transformer.
• Slight brightness fluctuations after approx. 10 min. and picture has slight blue tinge. (CTV70100 tip from INTERVISION)
• LED lights up for a short time, flashover at line transformer, then LED lights up again for a short time. (+ extract of circuit diagram)
• Line transformer flash-over. (+ extract of circuit diagram)
• Excessive horizontal size. Pincushion distortion. on sides. (part of circuit diagram displayed)
• Picture suddenly becomes considerably wider when warm (picture attached)
• Vertical line tearing. intermittently. (part of circuit diagram displayed)
• Flyback lines. at top. (picture attached)
• No picture content. TXT is visible. Sound present. H/V defelction is present.
• Excessive brightness. Flyback lines. Audio OK . (INTERVISION - CTV70100 information)
• No picture, no sound. Appliance ticks in second intervals.
• Starts up normally, picture remains dark.
• Switches to standby after brief power consumption.
• No horizontal deflection. (part of circuit diagram displayed)
• No picture. via RF output.
• No picture. Horizontal streaks. Audio OK . (extract of circuit diagram attached) (CTV70100 INTERVISION repair tip)
• Line output transistor fails repeatedly. (extract of circuit diagram attached)
• IC (TDA8177F) defective. (+ extract of circuit diagram)
• Picture too small, black edge 2cm at the top and bottom, left and right.
• TXT jitters.
• Dead. (part of circuit diagram displayed)
• Picture too big. E/W cannot be corrected in the service menu. Picture is slightly squashed.
• Ticking noise. (extract of circuit diagram attached)
• Dark picture or picture becomes dark after a short operating time.
• Starts with mechanic reset after inserting mains plug. Display flashes, then switches off. "Digital" appears in display.
• No audio. Picture OK. Switches to standby, intermittently. No RC functions. OK after several switch-ons.
• Picture has folded over at the top and three multicoloured lines in approx. three thirds of the picture.
• Q307 becomes very warm. (with circuit diagram extract)
• Switches to standby. intermittently.
• G2 cannot be adjusted. Brightness changes with focus control. (CTV70100 tips)
• No configuration data. TXT vibrates.
• Black stripes.
• HV builds up, switches then off. Sound remains.
• No picture. OSD and TXT OK .
• Defective rectifier and after replacement PSU whistles from time to time and then goes defective again. (CTV70100 tips)
• One colour missing. (extract of circuit diagram attached)
• Streaks in picture.
• Appliance pulsates every 4 secs. (+ extract of circuit diagram) (CTV70100 tips)
• PSU pulsates. (extract of circuit diagram attached)
• Switches on again after 30sec after having been switched to standby. Remains in standby when "SYSTEM MAINS standby" is set in the menu. Only LED flickers intermittently.
• LED lights after start-up and then no function.
• Picture shifted horizontally. (with circuit diagram extract)
• Clicking noise from line output stage at every 5 secs. (part of circuit diagram displayed)
• Some lines on upper picture are folded over.
• Picture becomes gradually darker after switch on. Picture brightness flickers intermittently.
• No audio. No picture. (extract of circuit diagram attached) (CTV70100 tips)
• Carry out NVM (values) reset.
• HV BU fail sporadically (heatsink becomes very hot, this is normal) (picture attached)
• No picture. (picture attached)
• Picture ok in the bottom half, black screen at the top and fine horizontal lines.
• Fuse T3.15A/H blown. (picture attached)
• Deflection error. (part of circuit diagram displayed) (CTV70100 tip from INTERVISION)
• 2 cm missing from picture on top. (+ extract of circuit diagram)
• Excessive horizontal size. (+ extract of circuit diagram)
• How to carry out NVM reset.
• No start-up. (+ extract of circuit diagram)
• No picture content. Approx 10cm black bar on top. (with circuit diagram extract)
• Dark screen. Audio OK . (extract of circuit diagram attached)
• When tuning manually or with search mode only K21 can be received.
• Displays and TXT are too faint.
• Bright picture. Flyback lines. (+ extract of circuit diagram)
• LED switches on briefly, then no function.