CT5520UK 54358071 / ITT [TV]

• Dead. (extract of circuit diagram attached)
• Distorted picture. at top.
• Line output transformer is defective.
• No start-up. Standby LED flashes .
• Dead at switch on. Standby OK.
• Blank raster noise appears when aerial is unplugged.
• Appliance is dead. Sometimes starts if turned on and off several times.
• No blue.
• Vertical IC burnt.
• Does not start. PSU starts up briefly, then protective circuit is active.
• Vibration at top of picture. Picture height changes.
• Hum on sound and picture. (picture attached)
• Ballooning.
• Vertical lines on left side of screen, thiner towards edges and bigger towards centre, approx. 10 cm on screen. Lines tremble. Fault present also in AV mode with black screen. Switches off after a while.
• Defective mains fuse. Functions OK for two weeks after replacement.
• Stretched picture. (service info for ITT -CT5520UK)
• PSU whistles. in standby.
• Colour is uncontrollable.
• Line shakes in the top part of the picture. V amplitude jumps.
• Stand-by LED does not function.
• Intermittent no video or front display.
• Small picture with hour glass effect.
• Snowy raster. (extract of circuit diagram attached)
• Picture becomes quite dark and gets distorted after 20 or 30 minutes.
• Small, pulsating picture, low brightness, sound level varies.
• Picture is small and pulses, brightness is low and the sound is variable.
• Encrypted Canal Plus after 1 hr.
• No start up, stuck in standby. Red LED switches off when trying to start up.
• PSU does not oscillate. (part of circuit diagram displayed)
• No video or standard switching.
• No picture.
• PSU chirps for approx 10 secs, then OK.
• Hum on sound and picture. Capacitor on mains rectifier has been changed. 12V and 16V on IC521 are too low. (extract of circuit diagram attached) (CT5520UK ITT repair tip)
• No colour. (ITT - CT5520UK information)
• Picture pulls inwards at the top
• Sometimes while watching a TV channel, TXT appears twisted, as if it had line tearing.
• After half-an-hour flashing lines appear on screen.
• The screen is black and the appliance is in safety mode. There is a white horizontal line across the screen. (extract of circuit diagram attached)
• Picture is horizontally highly distorted.
• 00 on display, remote control often fails or no functions possible.
• Reduced vertical and horizontal size.
• Tuning of the sound is incorrect as one track is O/C. (CT5520UK tips)
• Standby LED flickers for approx 10 secs. Switches off.
• Line S2055 fails immediately. FBT has been changed, TDA8372 has been changed.
• Very distorted picture with very strong vertical waves and picture almost black and white. (with circuit diagram extract)
• Set dead or intermittently dead. Set may not go to standby via remote. (ITT - CT5520UK information)
• Vertical collapse. (CT5520UK tips)
• Excessive horizontal size.
• Carries out unwanted operating steps eg. switches off, switches over channel, changes volume etc.
• Chirping.
• Does not start up from standby, cracking is audible and appliance switches OFF, standby LED switches off.
• The screen is black and the power supply whistles.
• Line output stage U is 45V.
• Appliance will not start up. IC701, D717 and C711 have already been changed. Appliance still won't start up.
• The appliance switches off after hours or days and goes to standby. After switching on again it switches off after an even shorter period of time.
• Picture width varies according to picture content. Power supply voltages ok and stable. (extract of circuit diagram attached)
• LED lights up for 1 sec. at switch on then switches off.
• No start-up (when cold). Standby LED flashes . PSU pulsates. (service info for ITT -CT5520UK)
• Stuck in standby. Attempts to start up, LED flashes one time and turns off.
• Power supply BU908 blows occasionally at switch on, never during operation. (+ extract of circuit diagram)
• Shuts down. after start-up.
• No green.
• The picture is green and purple. No SECAM identification.
• Time base whistles and goes into safety mode. Fault persists when FBT has been changed. (+ extract of circuit diagram)
• No picture and sound. Buzzing sound at switch on. Standby LED is blinking, then go to standby. (CT5520UK tip from ITT)
• Starts up, but after 10 minutes picture is snowy and tuner sensibility decreases
• No start-up (when cold). (picture attached)
• Power supply. When rebuilding this supply, it is possible that R512 may have failed.
• Vertical IC fails at switch on.
• "S" distortion. Cannot be adjusted.
• Dead. Whining.
• Switches off and goes to standby after hours or days. After switching back on, the appliance switches off again after 30 mins. After that, in even shorter time.
• When in standby appliance hums or crackles. LED pulses.
• Power supply does not function.
• White spot when switching TV off.
• At switch on, stand by display lights up for a short time, line end stage attempts to work, but switches off again straight away.
• Power supply squeeling and dead.
• No start-up (intermittently).
• Does not start when cold. Only chatters. Appliance runs when warm.
• Comes on for a short time. (+ extract of circuit diagram)
• Erratic start-up.
• No picture. Audio OK . (service info for ITT -CT5520UK)
• Switches on. Pulsates 3 times, then switches off. (ITT - CT5520UK information)
• Distorted picture. No audio (intermittently).
• Switches off intermittently, comes then back.
• Intermittent line drive failure causing no picture but sound is OK.
• Blank raster. Flyback lines.
• Trips. when cold. No or intermittent start-up. when cold.
• No picture and no sound. Image distorted.
• Picture vibrates slightly for approx. 1 min.
• Necessary modification when replacing oscillator part.
• Purity fault and the sound hums. The positive temperature coefficient resistor has been changed.
• Repeat failure of the STR58041.
• Stuck in standby. LED flashes once and goes OFF.
• Does not start up. LED comes on then goes off immediately.
• The power supply relaxes. (part of circuit diagram displayed) (CT5520UK ITT repair tip)
• Stuck in standby. (picture attached)
• The side of the picture drops and a horizontal line appears. Only a third of the line end stage works. The sound is missing, but the power supply unit operates.
• Stuck in standby. LED is red .
• No start-up.
• Pincushion distortion.
• The lower half of the picture does not exist.
• Picture has shifted.
• Image jitter in upper part when turning on. Disappears after a short while.
• Vertical lines on right of picture. First line is blue. (extract of circuit diagram attached)
• No start-up. No LED. Standby OK.
• Goes on and off again for a short time.
• Occasionally the PSU does not start up. If it does, the appliance is ok. (PSU on the right with STK54041).
• Set dead. R502 is in open circuit but at switch on there is a bright flash and the plug fuse goes open circuit.
• R702 fails at once if the aerial cable is plugged in (cable connection).
• Poor start up when cold. Hiccups. OK after several attempts.
• No sound or nasal sound.
• E/W fault. No E/W correction.
• Picture wavering at top. (CT5520UK tips)
• LED flashes briefly at switch on, then appliance switches off.
• The appliance remains in standby and the LED remains lit up. (service info for ITT -CT5520UK)
• Power supply goes into safety mode when coming out of standby.
• Standby LED lights even after switching on, and switches then off. Lamp lights.
• Bright picture. Flyback lines.
• Set dead. Trys to come on but trips rapidly then cuts off.
• G2 is too high, if attempting to decrease, picture is visible for a few secs then becomes dark.
• Crackling audio. Lines in picture. on the left.
• Dead, channel lights OK. (CT5520UK tip from ITT)
• Hiccups 3 times and switches off. Lamp lights.
• No start-up from standby. (with circuit diagram extract)
• Switches off by itself. at start-up.
• No tuning. Higher channels in band I/III/V are not received.
• When switched on the appliance goes into stand by then starts up. (extract of circuit diagram attached)
• BU508 fails in line output stage immediately after start-up.
• PSU doesn't start up. Pulsates.
• When switching from AV input to any pretuned channel, no horizontal sync, but shortly after picture synchonizes correctly.
• No functions. (ITT - CT5520UK information)
• Intermittent colour bands at high contrast.
• At switch on, blank screen and loud hash noise.
• No audio. No picture.
• Tearing visible especially with crosshatch pattern. Vertical lines.
• Reduced picture, low brightness and varying sound.
• Vertical stripe in the left picture third.
• Blinking colours or no colour on Canal Plus.
• No power supply outputs.
• Occasionally vertical picture jitter until total failure of the vertical deflection stage.
• Station memory cuts out intermittently, especially when connecting the cable the stations fall out. Then the contrast adjustment gets defective and the appliance doesn't respond to the RC.
• 24V when disconnecting collector of line transistor, otherwise voltage collapses. Line transformer does not start up. 5V on IC721. Display does not light up, standby lights up. (extract of circuit diagram attached)
• Picture shaking in random direction.
• Switches off by itself after a while. Vertical lines on picture right side of approx 10 cm. Jamming in AV mode.
• The station storage breaks down completely, when connected to cable, all the programmes are mixed up. The contrast control is defective and the remote control does not work. (+ extract of circuit diagram)
• Mains fuse blown and mains transistor T707 (BU908) s/c.
• Switches to protection mode. (service info for ITT -CT5520UK)
• Starts up only after several attempts, fizzles for 10 secs, then OK.
• Intermittent shut down, numbers still light up and the channels can be changed.
• Stripes in picture. on the right.
• E/W pinch and picture is folded up vertically at bottom.
• Enable Hotel mode. Disable hotel mode. (CT5520UK ITT repair tip)
• Impossible to go into standard LL as the appliance remains locked in standard BG.
• Flickering colours with Canal Plus. (CT5520UK tip from ITT)
• During operation switches over by itself to other channels. (service info for ITT -CT5520UK)
• Standby LED switches off after start-up. Dead.
• Poor quality picture in high channels.
• After changing the deflection transistor BU 508 it blows again after 1-2 days. (extract of circuit diagram attached)
• Twisted picture when switching on from cold.
• No vertical deflection.
• IC401 (TDA3654) fails.
• Horizontal stripe.
• Picture becomes snowy and image offset after approx 20 minutes of operation.
• No HV (intermittently).
• No RC functions. No front panel function.
• Battery is discharged too quickly.
• Black screen.
• Shuts down. at start-up.
• The appliance goes out of tune in VHF. (CT5520UK ITT repair tip)
• Black shadow in centre of picture.
• Picture flickers horizontally.
• Tuning drifts.
• Switches off after a few secs. with a whistling sound.
• Shuts down. Standby LED does not light.
• No red.
• Horizontal sync error. Spund appears only when horizontal is synchronized. Can be adjusted with pot, but fails again when switching channel.
• Occasionally, goes from top of picture to the green, hum in the speaker and dark bar. Goes from bottom to top.
• Hum in picture. Lines shifted on top.
• No synchronisation. intermittently.
• No function, red LED lights up for a short time at switch on.
• Vertical jitter.
• No vertical deflection, only a horizontal bright line. Sound OK.
• PSU attempts to start with noise. After 3-4 secs it stops and LED indicator goes off.
• Faulty vertical deflection.
• Low contrast (after warm-up).
• Line transistor blows after 1 hour.
• No sound or picture channel change indicator o.k.