668102 / SBR [TV 70-74 (66-70) cm picture]

• Field IC repeatedly fails. (extract of circuit diagram attached)
• Negative picture.
• Vertical output stage drops out.
• Switches to standby. after a few minutes.
• Blurry picture. (picture attached)
• Mains fuse and transistor BUT11 fail once a week. (SBR - 668102 information)
• Field instability. (extract of circuit diagram attached)
• BUT11A blows intermittently.
• Dark picture. TV starts. Horizontal stripe appears when voltage on G2 is increased
• Within 10 seconds the power supply only produces 80V, and is then fine. OK in when warm. (part of circuit diagram displayed)
• Dark screen. (picture attached)
• No picture, no sound and the line transformer howls. (+ extract of circuit diagram)
• The functions brightness, colour and sound do not work but the display is ok (+ extract of circuit diagram)
• PSU pulsates.
• Picture bends in at the sides, variable with brightness. (picture attached)
• No start-up. intermittently. (extract of circuit diagram attached) (668102 SBR repair tip)
• No picture, no sound, LED flickers and throbs severely when appliance cold or when programme changed. (668102 SBR repair tip)
• Lines in picture. intermittently. (668102 tips)
• Converting pal/secam in the Middle East and Morocco. (668102 tip from SBR)
• Smearing in picture. after start-up. Flyback lines.
• How to enter channel adjustment menu.
• To improve reliability of SAB3037.
• No start-up. (part of circuit diagram displayed)
• Tunes incorrectly. (with circuit diagram extract)
• Tripping (intermittently). (+ extract of circuit diagram) (SBR - 668102 information)
• Picture appears after a certain amount of time.
• Very defective vertical sync and occasionally also horizontal vibration.
• Blowing mains input fuse. (with circuit diagram extract)
• Poor synchronisation. (part of circuit diagram displayed)
• Striations.
• Intermittent loss/predominance of one of the three primary colours (R, G or B).
• The appliance can no longer be operated (+ extract of circuit diagram)
• Pincushion distortion. No E/W correction.
• Unnatural colours. (service info for SBR -668102)
• Switches on by itself. intermittently.
• No results but 140V and 19V primary voltages are ok. Collector of IC7535 reads 0V.
• Picture jumps at channel switch over.
• Working voltage +140V goes under 80V.
• Insufficient height with cramping and centre crossover distortion. (+ extract of circuit diagram)
• Occasionally no sound and no picture. Black screen and E5 on display. Starts up again when pressing programme +.
• Repeated failure of line O/P transistor. (with circuit diagram extract)
• Poor frame amplitude with sudden frame movements.
• Poor E/W.
• Menu reactivation.
• When first switched on intermittent squealing from line timebase.
• High contrast. No contrast control.
• When switching the appliance on it starts after a few attempts (standby LED flickers) and stops (LED off). If the appliance is switched on again the same happens.
• No picture. Audio OK . (with circuit diagram extract)
• The field output transistor overheats and scanning is distorted after 5 minutes.
• No contrast control. (picture attached)
• The CTV does not switch on. 2A fuse blows. Power supply circuit is ok.
• HT and EHT come up for an instant at switch on then main HT drops to a steady 30V.
• Connection of a loop system to the TV.
• Deguass/dead/ht shuts down after 2-3 seconds.
• Intermittent net curtain effect.
• Raster cramped at the bottom and stretched at the top (+ extract of circuit diagram)
• Picture becomes dark. After cooling down picture is ok again.
• Error codes. (extract of circuit diagram attached)
• Black screen. Line whistling. (668102 tip from SBR)
• Loss of remote control. Latch up. (with circuit diagram extract)
• Does not tune. Right channel number in display. (+ extract of circuit diagram)
• Appliance does not function, squeaking sound when turned on.
• The CTV does not switch on. The 2A fuses are o/c; after replacing them they keep blowing.
• Flashing display. (picture attached)
• After playing for a short time TS7618 (BU508V) blows.
• Vertical streaks. intermittently.
• Whistling. at start-up. (+ extract of circuit diagram)
• Test pattern is egg-shaped.
• Intermittently collapses.
• Picture is dark, sound is weak, no colour. Channels are erased.
• No shutdown with RC.
• PSU chirps.
• Power supply is slow to start. (part of circuit diagram displayed)
• Cannot switch to install menu.
• Incorrect frame. (with circuit diagram extract)
• Dead or intermittently dead.
• Trips. (+ extract of circuit diagram) (SBR - 668102 information)
• Incorrect code number Pos. 7618.
• BU508 blown repeatedly. (668102 tips)
• Torn picture. Noise in audio.
• Difficult start up. If it starts up, picture can be distorted vertically and no functions via RC or front panel.
• EHT does not start up.
• Barrel effect.
• The appliance does not switch on. F3 appears on the display.
• Fuse 1601 blows at start up. Power supply transformer makes a whistling noise. T7599 ok. C2608 and zener 6604 OK. Line transformer ok. Line BU OK. (SBR - 668102 information)
• Dead except line whistle.
• Vertical output IC7570 (TDA3654Q) breaks frequently. (+ extract of circuit diagram)
• Memory loss. (extract of circuit diagram attached)
• Interference of fine parallel grid lines.
• No scanning, the line transformer is ok, fuse 1601 blows at start up. Even if the transformer is disconnected, the power supply starts up. Voltages are ok.
• BUT11 fails.
• Faulty TXT.
• During TXT, faint vertical lines and corrupt text on screen.
• Interference C.G. bar in picture on channel 2. (+ extract of circuit diagram)
• Black screen. 'F3' appears on display.
• When warm, switches off completely or hiccups in the PSU. (SBR - 668102 information)
• Comes on in standby. When switching to a channel, picture and sound start up correctly but appliance switches again to standby after approx 30 secs.
• Slow start-up. (668102 tips)
• Sometimes the appliance fails and a white line appears. (SBR - 668102 information)
• No LED lit.
• Buzz in audio.
• Dead. No standby light or channel indicators on. Mains fuse O/C. (extract of circuit diagram attached)
• Intermittent loss of sound and vision with a buzzing noise coming from the power supply. (extract of circuit diagram attached)
• Field jitter. After field IC has been replaced there is field foldover. (with circuit diagram extract)
• Lines on picture, different brightness between lines and the lines move about.
• Chopper S/C. (with circuit diagram extract)
• Black lines in picture.
• Severe patterning. (extract of circuit diagram attached)
• Ragged verticals and line output transformer sings. (668102 tips)
• Excessive horizontal size. (with circuit diagram extract)
• Does not switch to standby. (+ extract of circuit diagram)
• TV blocked. E1 on display, no volume control. Sometimes it starts up correctly for a few mins then switches back to E1. This happens with scart unplugged. (with circuit diagram extract)
• Focus potentiometer replacement.
• New channels cannot be installed. (668102 tip from SBR)
• Bars in picture. (picture attached)
• BU508 repeatedly defective after few seconds.
• Enable Hotel mode. Disable hotel mode. (service info for SBR -668102)
• Poor vertical synchronisation. Horizontal jitter. intermittently. (SBR - 668102 information)
• Several attempts to start up (standby LED flashing) then no function (LED off). When switched on again, same fault occurs. (extract of circuit diagram attached)
• Display flickers. Shuts down. (with circuit diagram extract)
• Dark screen. Audio OK .
• Ticking noise. in standby. (extract of circuit diagram attached)
• No picture. Audio and OSD OK .
• Cracking noises from set when first switched on from cold, causing loss of memory settings for the brightness. Then set dead. (+ extract of circuit diagram)
• Whistling.
• Dead, mains bridge blown up.
• Fine lines on picture. (668102 tips)
• Reduced horizontal size. (extract of circuit diagram attached)
• Ruffled picture as if HT leaking. (+ extract of circuit diagram) (668102 tips)
• No vertical deflection. intermittently.
• Stand-by LED is on, but the set does not go to stand-by mode. (part of circuit diagram displayed)
• Thick black bar at bottom of picture. Seems like foldover.
• If TDA3651 or TDA3652 are used as vertical output stage, TDA3653AQ can also be used for 90° picture tubes in case of repair. TDA3654Q can be used for 110° picture tubes. Following changes must be carried out.
• Flashing picture. Flashing display. (668102 tip from SBR)
• No tuning, no change in tuning voltage when search tuning initiated, but front display shows the correct channel number. (+ extract of circuit diagram) (668102 tips)
• Ringing in picture.
• Code number for coil S5601.
• Intermittently line output transformer blows.
• No operation.
• Vertical collapse (intermittently).
• Raster IC defective after 2 weeks. IC fails occasionally after connecting aerial. (+ extract of circuit diagram)
• Ragged verticals. (picture attached)
• BU508 cuts out after playing approx. 5 minutes. (extract of circuit diagram attached)
• No RC functions. (with circuit diagram extract)
• No signal. intermittently.
• Uncentered picture. (part of circuit diagram displayed)
• Line stage whistles when warm.
• Cuts out on bright scenes.
• No picture and no sound. F3 in display.
• No picture. Wavy raster and display flickering.
• Coloured spots on flat square picture tubes.
• Line tearing. Poor vertical synchronisation.
• Sound was modulated at random by squawks and squeaks. (extract of circuit diagram attached)
• Line output transistor destroyed.
• No picture, no sound, there is a slight voltage present. The stand-by LED light up. (picture attached)
• Safety resistor R3601 goes defective after switch on and then the power supply whistles. (+ extract of circuit diagram)
• Vertical foldover at top. (+ extract of circuit diagram)
• Stripes in picture.
• Low brightness with severe Hanover bars.
• Smeary, broken colours at left hand side plus too much saturation. (+ extract of circuit diagram)
• Safety test after repair.
• Stuck in standby. Buzz coming from appliance.
• No signals, no display.
• No raster. intermittently. (668102 tip from SBR)
• No picture. When you switch off the appliance a horizontal line appears for a moment.
• Cannot switch to 'Installation' menu. "DESACT" displayed.
• Reducing pick-up from PSU and limiting leakage from T7687.
• Low contrast after Q201 and TA7698 have been replaced.
• Dead except F3 in OSD.
• Very intermittently the standby and mute LEDs flash and channel display goes off. (+ extract of circuit diagram)
• Poor picture. Low contrast. (with circuit diagram extract) (service info for SBR -668102)
• No demagnetization, no voltage, after 2-3 secs fails again.
• After a few minutes line ripple appears, followed by fading picture and sound.
• Erratic tuning.
• Tuning erratic after changing battery.
• In position TXT, F2 on display.
• Appliance is dead with line whistle.
• To switch on "Protection Mode" flat square picture tube.
• Vertical pattern over the whole screen. (extract of circuit diagram attached)
• Field jitter, verticals ragged and pulling at switch on. (with circuit diagram extract)
• Vertical shaking. intermittently.
• Some channels alternate between good picture and snow. OK on scart input.
• Fuse 1651 blown. (extract of circuit diagram attached)
• Text displaced. (picture attached)
• Stand-by LED flashes or lights up spontaneously.
• Green spot.
• Station search scan stops at a point near the station tuning point, but not at the exact tuning point. (668102 tips)
• Unstable picture from video recorder. (extract of circuit diagram attached)
• No synchronisation.
• Replaced power regulator which cured fault. After replacing the PCB it went S/C again.
• The back-up IC blows always although the appliance is turned off. (+ extract of circuit diagram)
• Lines in picture. at top . (+ extract of circuit diagram) (668102 tip from SBR)
• No start up. Pumping noise.
• Vertical foldover. (service info for SBR -668102)
• Loss of memory when set switched off. (+ extract of circuit diagram)
• Switches to standby. depending on picture content.
• Unusual channel selector fault, as though the memory is useless.
• No start-up. when cold.
• Unstable, rolling picture with intermittent line pairing when changing scenes. (extract of circuit diagram attached)
• Responds to the RC only from 2-3cm. RC OK.
• Picture shifted upwards.
• No sound on P1. Blank raster. (with circuit diagram extract) (SBR - 668102 information)
• Line hooking on new pre-recorded tapes with the macro vision anti copying signal.
• Picture too small below. The entire picture is shifted down.
• No functions. (SBR - 668102 information)
• No figures on display.
• Flyback frame.
• Line output transistor S/C. (picture attached)
• Appliance buzzes when put into standby, and won't come out of standby after chopper replaced. (+ extract of circuit diagram)
• Top of picture shifts.
• No HT recovered when H scan plug disconnected.
• Squealing noise. at start-up.
• Incorrect frame deflection.
• No start-up from standby. No RC functions.
• HT is low, 25V instead of 140V. (extract of circuit diagram attached)
• No picture on half inch at left.
• Egg-shaped picture. (part of circuit diagram displayed)
• Dead. (part of circuit diagram displayed)
• Trips quickly.
• RGB is not working correctly. Poor colours. (picture attached)
• Cracking noises from set, causing loss of memory settings. (+ extract of circuit diagram)
• Power supply trips out (over volt condition).
• Line whistling when hot.
• Power supply tripping, whistling, arcing sound from scan yoke assembly, possibly some smoke from main PCB. (with circuit diagram extract)
• Over-voltage circuit active. (part of circuit diagram displayed)
• No tuning. (extract of circuit diagram attached)
• No start-up. Standby LED flashes .
• 140V voltage supply varies. (+ extract of circuit diagram)
• The appliance functions intermittently, and the clock starts flashing.
• Vertical output IC intermittently defective with possible patterning in picture.
• Failure of IC7570 (TDA3653A "90" or TDA3654 "110") (with circuit diagram extract)
• Horizontal grey line superimposed on it.
• Noise in audio. Picture OK .
• Line pairing.
• Dead. Line output transistor and regulator S/C.
• Zebra-striped vertical lines. Picture is a bit oversized.
• Excessive brightness. Flyback lines. (668102 tip from SBR)
• Line output transistor fails repeatedly. (extract of circuit diagram attached) (668102 tip from SBR)
• Switches to protection mode. after start-up.
• Intermittent line transistor goes short.
• Cycles on/off. Flashing display.
• Flyback lines. at top.
• 2A mains fuse blown, BUT11A chopper transistor T7686 s/c. D664 (BYD33J) also faulty. (extract of circuit diagram attached)
• BUT11 chopper transistor S/C collector-to-base. (+ extract of circuit diagram)
• Diode 6663 goes defective after playing for 2 hours. (+ extract of circuit diagram)
• Main fuse is burnt. S/C in chopper transistor T7686 (BUT11A). D664 (BYD33J) is also defective.
• Low HV.
• Tripping. (with circuit diagram extract)
• Set not tuning right, battery ok.
• At switch on, intermittent squealing from line stage.
• PSU whistles. (+ extract of circuit diagram)
• SOPS radiation. (part of circuit diagram displayed)
• Frame problem at bottom of screen.
• Set goes off after 20 minutes. (extract of circuit diagram attached)
• Colours rolling.
• No start up. Noise from PSU.
• Stuck in standby.
• Bright raster. Flyback lines. Fault occurs intermittently. . (picture attached)
• No start-up from standby with RC. Trips. (extract of circuit diagram attached)
• Defective geometry. Raster appears narrow at the bottom and lengthened at the top part. (+ extract of circuit diagram)
• Line osc. not running only buzzing noise. (service info for SBR -668102)
• No tuning. only on certain channels.
• 140V voltage is 120V. Stand-by and EXT1 LEDs are on. (+ extract of circuit diagram)
• Tripped. (668102 tips)
• No picture. on upper half screen.
• Tuning drifts. Memory loss.
• Picture looks like a mosaic.
• 140V goes high.
• Power supply dead. Checks shows that there is .6V at the base of the BUT11AF chopper transistor and over 300V at its collector but the circuit won't oscillate. (part of circuit diagram displayed) (SBR - 668102 information)
• Hum bar going down screen.
• Switches to standby after approx. 1min., OK again after switch on, then switches off again.
• Looks like tuner, noise only.
• BU508V keeps blowing. C2618, 2609, D6609, TS7630 and line transformer. (extract of circuit diagram attached)
• Bright picture. Retrace lines.
• Power supply collapses.
• Field jitter/foldover.
• Cannot be reprogrammed
• Dark picture.
• Converting Pal/Secam.
• Tuning varies at a fixed rhythm as if AFC does not latch.
• Intermittent loss of channel memory and parameters previously selected by the user.
• BUT11AF S/C. Fuse blown. (extract of circuit diagram attached)
• Vertical bars in left picture side.
• Black lines in the picture, especially on brightness and text picture. (668102 tips)
• Squealing noise. (part of circuit diagram displayed)
• Varying 140V ht line. (part of circuit diagram displayed)
• Destroying chopper transistor and bridge every few weeks. (+ extract of circuit diagram)
• Vertical deflection defective and E/W fault.
• Squeaking from EHT stage when cold.
• No function. Mains power switches on and off with whistling tone.
• No green.
• BUT12A blows after a few weeks.
• Bright raster. Flyback lines. (extract of circuit diagram attached)
• When the TV is switched on it is completely dark, there is no sound and only the display circuit functions.
• Excessive horizontal size. Pincushion distortion. on sides.
• Corrections to service manual.
• Skips channels during tuning. (668102 SBR repair tip)
• Unstable and oscillating audio. (extract of circuit diagram attached) (668102 tips)
• Black screen. Intermittent loss of scanning raster.
• Contrast control inoperative on IC7300, PN7 not varying. (extract of circuit diagram attached)
• Intermittent shut down of the PSU. (with circuit diagram extract)
• Lines in picture.
• No TXT (intermittently).
• Black lines on the picture -it looks as though every other line of picture content is missing.
• No vertical deflection.
• No vertical deflection. Picture is reduced to a line which is approx 1cm wide with the bottom part rolled up. (picture attached)
• Snow in picture. Flyback lines.
• Flyback lines in 1 colour during dark scenes. (+ extract of circuit diagram)
• No TXT.
• Standby LED does not light.
• Intermittent squealing from line stage at switch on.
• No picture. No audio. LED blinks .
• Power supply hiccups and LED flashes.
• Colour decoder Pal-Secam.
• Coil shaped picture. Can be adjusted to straight picture but remains too narrow.
• Dull screen, no image.
• When set is cold, goes into standby mode but the LED flickers. When set warm it still goes into standby but won't come out. Power supply buzzes loudly and the LED's flicker rate is faster. (+ extract of circuit diagram)
• Appliance is dead, PSU whistles.
• Intermittent standby. Mute LED flickering. (service info for SBR -668102)
• Faint pattern of vertical lines about a quarter of an inch apart across the screen and occasional corrupt teletext.
• When put in standby it buzzes and won't come out.
• No horizontal deflection.
• No light though sound is fine. (extract of circuit diagram attached)
• Fluctuating picture both horizontally and vertically with increased volume. Picture is fine at low volume. (extract of circuit diagram attached)
• Poor vertical linearity. (with circuit diagram extract)
• Changing the vertical deflection-IC TDA3654.
• F0 in the display, PSU does not function.
• Channel tuning information does not store. (with circuit diagram extract)
• After switching on the TV and changing channels sometimes the channels are present and sometimes they are out of tune.
• Intermittently dead.
• Moire pattern. (part of circuit diagram displayed)
• No E/W correction.
• Pattern on screen.
• Vertical collapse. (+ extract of circuit diagram) (service info for SBR -668102)
• Faint pattern of vertical lines approx 0.25" apart across screen and corrupt TXT intermittently.
• Jumping and line tearing, varies according to content. (extract of circuit diagram attached)
• After operating normally for a short time the raster disappears on the TV and F3 appears in the display. (part of circuit diagram displayed)
• Appliance quits, no picture, no sound, no display and power supply whistles. Raster possibly too large. (with circuit diagram extract)
• Field collapse every few days intermittently. (picture attached)
• Faulty raster.
• Blank raster. Audio OK . (with circuit diagram extract)
• Distorted picture.
• Picture appears slowly. Blurry picture. Audio OK .
• Vertical jitter. at bottom. (extract of circuit diagram attached) (668102 tips)
• Black screen. PSU whistles.
• The display does not function (commands brightness, colour and sound). (part of circuit diagram displayed)
• Picture vertical tearing. Vertical foldover at lower part of frame. (SBR - 668102 information)
• 3cm on the lower picture edge are black. When centered vertically, the line will not move. (part of circuit diagram displayed)
• White screen with black line. (668102 tip from SBR)
• Vertical collapse. at bottom.
• White raster with flyback lines, trips after 20 seconds. (picture attached)
• Moire effect.
• Crackling audio. intermittently. Line tearing. (part of circuit diagram displayed)
• The remote control commands are not received but operating the appliance manually does function. (with circuit diagram extract) (668102 tip from SBR)
• No synchronisation. intermittently.
• Frame cramp at top. (with circuit diagram extract)
• After switching on the TV there is a loud background noise. Normal picture.
• Width flutter.
• No picture. (+ extract of circuit diagram)
• Poor picture because the appliance continues searching for channels. A good synch. pulse is not present on pin 28 of the tuner.
• Tuner drift on non remote sets.
• No brightness. No audio. (with circuit diagram extract)
• Unstable picture. (extract of circuit diagram attached)
• Back up battery has a higher failure rate. (picture attached)
• After flashover of picture tube, set is in protection mode. Set works again after turning on and off. (part of circuit diagram displayed)
• Sometimes the selected channels for each station are not stored in memory.
• Switches to standby.
• Enter service mode.
• E/W fault. (with circuit diagram extract)
• Memory loss. after start-up. (picture attached)