CT72STK / WALTHAM [TV 70-74 (66-70) cm picture]

• No front panel function.
• No start-up from standby. LED blinks . Arcing.
• No E/W correction. Picture too big.
• Lines in picture.
• Stretched picture.
• No PSU start up.
• Beeping sound in STANDBY mode from power supply.
• ATP is performed but no channel stored. All program positions are on channel 5. If channel is input manually, fine tuning drifts off tune.
• Dead. Tripping audio via left speaker.
• Poor vertical linearity. Vertical foldover at bottom.
• Control LED flickers only slightly red, othewise no function.
• No vertical deflection.
• Picture too small. after a few minutes.
• D605 S/C immediately.
• Reduced vertical size. Excessive horizontal size. No picture. intermittently.
• No horizontal synchronisation. Colour fault.
• No function. Standby LED flashes. Start up attempts audible from the PSU.
• Stuck in standby.
• Shuts down. after start-up.
• Picture is too bright and blurred sporadically. Error occurs when CRT board is tapped.
• No S correction.
• No start up. Standby LED does not light up. Faint ticking from the loudspeakers.
• Reduced horizontal size. Stripes in picture. on the left.
• R639 (10K) burns.
• Disable child lock. (CT72STK tips)
• PSU switches on only if the value of the trimmer resistor is increased to VR800.
• Picture brightness fluctuates or becomes increasingly darker, may intermittently be completely black.
• Picture is folded over from the top and approx 5 cm are missing from upper picture edge.
• No start-up. LED is green.
• PSU pulsates. at start-up.
• Excessive vertical and horizontal size.
• Line output transistor fails repeatedly.
• No sound menu in main menu and no sound.
• Vertical collapse. (CT72STK tips)
• Only half a picture, top is black. Picture has folded over.
• No audio. Popping noise from speakers. No audio options in menu.
• No CRT heaters.
• Starts up from standby. LED goes green. Intermittent or no picture.
• Picture too wide. Height is normal. E/W not ok. Slight bowing in the TXT.
• No start-up. intermittently.
• No RC functions. (CT72STK tips)
• Poor picture. Flyback lines.
• Menu is only in English. Cannot change values in service mode. Picture is in 16/9 format. (CT72STK tip from WALTHAM)
• Oversized picture. Picture rolls over at upper picture edge when TXT is called up. Only blue picture via AV.
• Power supply fault.
• No start-up.
• Popping noise from speakers and squeak from power supply twice a second. Standby LED does not lit.
• No function, mains BU fails repeatedly.
• Tripping. in standby. (CT72STK tip from WALTHAM)
• Squealing noise. intermittently.
• No picture. Coloured lines.
• Dark picture (intermittently).
• Option codes.
• No picture. TXT OK .
• Primary of PSU pulsating. (service info for WALTHAM -CT72STK)
• Stuck in standby. intermittently. No RC functions. No front panel function. after start-up.
• Chirping.
• Red standby LED is lit, red changes to green during start via RC. Audible start up attempts.
• Small corrugations and no audio after start-up. After warm-up there is gurgling audio. Picture and audio OK after a while.
• E/W fault. Excessive horizontal size.
• LED flashes 2-3 times green and then switches back to standby.
• Buzzing noise from speakers when first turned on. Sometimes picture interference too.
• Tripping. (service info for WALTHAM -CT72STK)
• Tries to start up. LED is green for an instant then becomes red again.
• Tripping. Standby LED lit .
• Squealing from PSU. at start-up.
• EEPROM settings.
• Geometry fault.
• No picture. Audio OK .
• Top half of picture is black. Flyback lines in the middle. Picture is intermittently OK.
• No picture. No EHT. Audio OK.
• No tube heaters.
• Standby OK. When switched on, the appliance tries to start. Cuts up and LED alternates green-red. (CT72STK tips)
• Ticking noise. LED blinks .
• Q601(BU2508AF) blows after a few minutes.
• Dead. PSU ticking.
• Tripping. intermittently.
• No start-up. LED blinks .
• Blows D808 in secondary PSU when bringing set out of standby. Squealing from PSU at switch-on.
• PSU and D800 (BA159) blown.
• No start-up from standby.
• White horizontal stripes in picture.
• PSU does not start. LED is off. Low ticking.
• Memory loss.
• Reduced vertical and horizontal size.
• No switch on, red LED lit, then green LED flickers.
• Switches to standby. Standby LED flashes .
• Mains fuse fails immediately after start-up.
• BU2508AF fails after a few seconds.
• Stuck in standby. Faint ticking noise audible, which changes frequency when keys are pressed.
• Tripping. Red LED blinks.
• Audio disappears. 5min timer appears in OSD, then counts down and switches off. Fault occurs intermittently.
• Dark picture. (service info for WALTHAM -CT72STK)
• Switches after start up from standby to green and goes back to standby.
• No RC after some time, later ok again. OSD displays tear after some time.
• No CRT heater operation.
• No TXT.
• +UB control range is incorrect. +UB cannot be adjusted to minimum 155V. (service info for WALTHAM -CT72STK)
• Picture too small.
• Horizontal line.
• No start-up. Standby LED becomes green for a second, then reverts to standby.
• No or intermittent start-up. Snow in picture. No RC functions.
• No audio. No picture.
• PSU pumps at start-up.
• Vertical line.
• Remains in standby, LED becomes slightly darker after switch on (1sec) then brighter again. (CT72STK tips)
• Power supply cuts out.
• Dead. Standby LED lit .
• Horizontal bars run through picture.
• PSU pulsates.
• Ticking noise.
• No sound. Cannot call up installation menu.
• E/W fault.
• No picture. Only bright glimmer.
• Pincushion distortion. Picture too big. (CT72STK tips)
• Switches to standby. LED is red .
• Dark picture. after a while.
• Cannot switch to DK mode via main menu.
• Noisy picture. Only a blue square. Sound OK. (CT72STK tip from WALTHAM)
• Geometry settings.
• Dead. LED lit. .
• Picture appears slowly. Audio OK .
• Colour disappears after approx. 20 sec or no colour at switch on.
• No TXT. No OSD.
• PSU faulty.
• Shuts down, after a while. Coloured spots remain on screen. (CT72STK tips)
• Trips. (CT72STK WALTHAM repair tip)
• Reduced vertical and horizontal size. No STEREO.
• No HV.
• Reduced horizontal size. intermittently.
• Black line in top and bottom of screen in 16:9 mode.
• D606 overheats.
• Insufficient E/W defelction, Error decreases when warming up.
• Switches to standby. intermittently. LED flickers .
• No or intermittent picture. Dark picture.
• Clicking noise. via speakers (intermittently).
• Dead. Standby LED flashes .
• No line drive.
• Enter service mode.
• White dashes on picture when cold.
• Insufficient picture height, picture too wide. Delayed operation. No picture during AV, only display.
• Pulsating picture. Jagged verticals. Picture size varies.