257325EK / SBR [TV]

• The picture is horizontally unstable. (extract of circuit diagram attached)
• No picture. intermittently. (part of circuit diagram displayed)
• No audio. Flashing display. (picture attached)
• On certain stations,a different channel can be seen, blue and yellow waves appear on the picture.
• The store is lost completely (colour, brightness, etc.). The programmes are lost. (with circuit diagram extract) (257325EK SBR repair tip)
• No horizontal deflection.
• No E/W correction. (picture attached)
• Only partial picture at bottom of the screen. (+ extract of circuit diagram)
• Starts up with white picture and retrace lines, then falls out.
• Only UHF functions.
• No brightness variation. Does not memorize.
• No STEREO.
• Dark bar in the top tird. Linearity ok. (part of circuit diagram displayed)
• Except for small stripes on the bottom, picture is blank. Intermittently picture appears slowly for 2 mins from the bottom up.
• Approx 5-10 secs after switching ON, image is unsynchronized, after that period all functions are OK. Same problem after each channel switching. (SBR - 257325EK information)
• Page header suppression.
• There is no picture or a bad picture with certain programmes.
• Poor RC sensitivity.
• No picture. Sound and picture appear only after longer operation. Sound via AV is OK.
• Vertical collapse. (+ extract of circuit diagram) (SBR - 257325EK information)
• Wow and flutter on French channels.
• Picture shaking for a few secs when warm, then frame becomes black.
• TV does not start up. Power supply whistles when connecting D6644, no base signal on line transistor. If you lift D6644, base signal ok but displays F3. (257325EK SBR repair tip)
• No channel memory after disconnected from mains. (picture attached)
• Switches to protection mode. intermittently. PSU whistles. (SBR - 257325EK information)
• Vertical jitter.
• Wavy picture. on sides.
• No analog functions. Audio balancing LED (25CE4570) is lit.
• R3486 and D6486 burn at switch on.
• No tuning from Band 1 and 3. (SBR - 257325EK information)
• No sound with reception of mono transmitters. (with circuit diagram extract)
• Tuning drifts. when cold.
• Static discharge. (extract of circuit diagram attached)
• Switches off and whistles after 10 minutes of function.
• Line compression in upper picture part causes brightening of picture. Bright stripe.
• Line output stage transistor blows immediately at switch on. (part of circuit diagram displayed)
• The line end transistor SD1577 short circuits at once when the appliance is switched on. Resistors 3620 and 3619 (56R) blow. C2609 has been replaced. No dry joints.
• Washed out picture. (picture attached)
• Non-linear picture on upper side. (with circuit diagram extract)
• Screen switched off at start up. Picture appears after 2 mins. Sound ok. Time base ok. (+ extract of circuit diagram)
• Line output stage does not function. The resistors R3619+3620 burn out spontaneously. (SBR - 257325EK information)
• Receives all the UHF channels. VHF channels are memorized, but picture only from several UHF channels. (extract of circuit diagram attached)
• Dead. Humming noise from transformer. (+ extract of circuit diagram)
• Low brightness. Low contrast. (with circuit diagram extract)
• No sound, no picture. High voltage and LED from scart is present. (extract of circuit diagram attached) (257325EK tip from SBR)
• Lower sound via scart with Canal Plus or with VCR.
• Frequent breakdown of circuit transistor 7687 (BUT12A) of SOPS power supply.
• No picture, no sound, all three mains transistors are defective. (+ extract of circuit diagram)
• Ht high, will turn down to 159V but no further. (+ extract of circuit diagram)
• Whistling at the beginning. Black screen or stops after a while when it starts up. (+ extract of circuit diagram)
• No picture, no sound. After 5 mins picture with line sync problem and no sound. After 10 mins colour appears on picture but still no sound. (+ extract of circuit diagram)
• Picture switches periodically to black/white, tick in picture and sound (approx. 10 sec. on sportnet). (extract of circuit diagram attached)
• No start-up. intermittently. PSU whistles.
• Picture tearing when pressing the sound with sharp hum in the loudspeakers. Occasionally no sound or crackling at the start. (with circuit diagram extract)
• Appliance may stop by itslef when warm. Impossible to start it up again. Also stops when warm if you zap to an inexistant channel without a module. Sound and picture present.
• Hum in HF sound. Ok in scart.
• Starts up after connecting collector BUT12A to a safe GND. (+ extract of circuit diagram)
• Linearity and vertical centering are defective. (with circuit diagram extract)
• Programming the microprocessor (MAB8461/W155).
• Poor vertical linearity. (+ extract of circuit diagram)
• No picture in tuner or in scart. Audio OK.
• PSU does not work correctly. Voltage runs out of control to approx 170V and then PSU pulsates. F3 appears in the display before the pulsating.
• Wrong EHT values. (257325EK tips)
• Picture is visible on left and right. Drop out bars in the middle. (picture attached)
• Picture appears after 5-10 minutes.
• When switching on from cold the top part of the picture appears completely black or else with a dark band 6-8 cm high. Defect disappears when the appliance warms up. (part of circuit diagram displayed) (SBR - 257325EK information)
• Slow build up of top part of picture. (extract of circuit diagram attached)
• Safety test after repair.
• Interference in picture. (picture attached)
• Picture height flashes occasionally.
• No start-up (intermittently). (+ extract of circuit diagram)
• The picture is wobbly.
• Capacitor 2617 S/C.
• No TXT. when cold. (service info for SBR -257325EK)
• Protection circuit active (set hiccups). (picture attached)
• No sound via HF and AV. (with circuit diagram extract)
• Horizontal line only. Deflection appears after several mins.
• At start up picture appears in black and white with a 6 or 7cm wide band at the top of the screen (approx two thirds of the way down). (part of circuit diagram displayed)
• Video and display cut out. Only green light stays on.
• Horizontal line. on upper half screen.
• Maximum picture width, cannot be regulated, fuse 1601 is defective. (part of circuit diagram displayed)
• Unacceptable heating time of older picture tubes. (with circuit diagram extract)
• No colour, screen is pink.
• No +140V HT supply and whistling from power supply.
• Picture is black or grey. Sound OK.
• E/W fault. (+ extract of circuit diagram)
• Sometimes picture is blanked out at beginning of operation. (extract of circuit diagram attached)
• No start up. Mains switch noises.
• Loss of picture when switching to certain programmes.
• 140V goes up to 300V. Line output transformer immediately goes defective. (extract of circuit diagram attached)
• Poor picture. Horizontal lines.
• Cramped frame horizontally and vertically. (+ extract of circuit diagram)
• Linearity fault in top part of picture (only in cold condition). (picture attached)
• At the bottom of the screen 15mm of picture foldover.
• Display does not show 00-20 and 70-99. Only nos. 21-69 are shown and can be tuned.
• Character generator SAA5243P/E. (with circuit diagram extract)
• Fizzing and smoke. (+ extract of circuit diagram)
• SOPS transformer vibrates in standby mode. (part of circuit diagram displayed)
• Circuit cloche adjustment.
• After one or two hours picture disappears, sound OK only blank dark raster.
• Crackling "tick" in first half hour. No display during tick then display switches to channel 1.
• Sometimes no picture for 20 minutes. Sometimes no sound. Sometimes there is a picture but with interruptions, possibly lines swaying. (part of circuit diagram displayed)
• Repeated failure of T7687 (BUT12A). (+ extract of circuit diagram)
• Poor reproduction of copy protected VHS tapes. (picture attached)
• Excessive brightness. (+ extract of circuit diagram)
• Poor convergence. in the centre. (with circuit diagram extract)
• Switches off by itself. after a while. (extract of circuit diagram attached)
• Memory does not store brightness, contrast, colour and sound. (with circuit diagram extract)
• Storage of the basic value data for brightness, contrast, colour and volume is lost after switch off with the mains switch.
• Brief loss of colour during first ten minutes. Picture occasionally jumps when fault occurs.
• Top half of the screen slowing becomes a normal picture. (picture attached)
• Picture is disorderly and unstable, especially horizontally.
• The picture does not stand still, looks as if its laying next to a station. (+ extract of circuit diagram)
• Line output transistor is defective and thyristor 6698 goes into safety mode.
• No audio (intermittently). (extract of circuit diagram attached)
• Chroma sub-carrier oscillator adjustment.
• Whistling. after start-up.
• Blank screen. (part of circuit diagram displayed)
• Picture is considerably reduced, sometimes to a horizontal line. Then picture spreads out normally only to disappear after a certain amount of time.
• Picture flashes and sound warbles.
• Distorted audio (on the left). (part of circuit diagram displayed)
• Button for on/off switch.
• PSU beeps.
• No functions. (extract of circuit diagram attached)
• Knocking on the chassis is causing a short. The chassis has been resoldered completely.
• Faint whistle from line stage.
• STEREO matrix adjustment.
• Blank raster. Switches off by itself. (with circuit diagram extract)
• Horizontal white line. Black screen at switch on. Picture appears after 45 sec.
• No display. (+ extract of circuit diagram)
• Horizontal white line in middle of screen. E4 on display.
• Memory is erased. (with circuit diagram extract)
• Frame fault when warm. Light line or band on approx 15cm starting from top of screen.
• Picture is split and black and white.
• Poor audio. Crackling audio. (+ extract of circuit diagram)
• Dark screen. E4 on display. (part of circuit diagram displayed)
• Upper picture third is brighter (linearity fault). (part of circuit diagram displayed)
• In safety mode. In low tension arcing then line BU blows.
• No sound in Stereo/Dual. (part of circuit diagram displayed)
• VHF channels cannot be selected, jumps from UHF channel 69 to channel 21.
• Standby light appears for a sec then nothing. The CTV has no sound or picture. Battery is ok. Voltage on the collector of the transistor is ok. (with circuit diagram extract)
• 2SD1577 fails after approx 20 secs. Distorted picture at switch on. Power supply OK with 75W lightbulb.
• Reduced vertical deflection. at bottom. (257325EK SBR repair tip)
• Deprogramming at switch off.
• Chroma trap adjustment - Luminance circuit.
• Unsynchronised picture 5-10 secs after switch ON. Same problem after each channel switching. Functions OK.
• No function, slight spot of light on screen.
• No or poor tuning of offset channels. Loss of colour.
• Excessive HV. No picture. (with circuit diagram extract)
• No start up or standby. (+ extract of circuit diagram)
• Scanning fault. (+ extract of circuit diagram)
• No audio. Picture OK .
• No vertical synchronisation. (part of circuit diagram displayed)
• Dark picture. (extract of circuit diagram attached) (SBR - 257325EK information)
• Goes on for a moment then goes into standby. PSU with lamp ok. (part of circuit diagram displayed)
• No UHF and/or VHF and/or sound.
• Picture foldover, black striations in picture, especially in high channel range.
• Faulty display operation.
• No synchronisation. when cold.
• Picture shrinks and controls no longer adjust sufficiently when warm. Functions correctly for 15 mins when cold. Line transistor overheats and sparks. (picture attached)
• Tuning unstable. (picture attached)
• With 2B ECO, IIC clock audible at min. volume. (service info for SBR -257325EK)
• Occasionally the picture gets brighter at a successively quick rate. (extract of circuit diagram attached)
• When switching on, channel 3 or 9 comes on but on rare occasions also 1. (257325EK SBR repair tip)
• Stuck in standby, Power Supply Part tripping. Tries to start up if prog button held in but LED corrupted. (part of circuit diagram displayed)
• White stripes in picture for 2-3 minutes. (part of circuit diagram displayed)
• R3619 and R3620 burn out spontaneously. (picture attached)
• White flyback lines. White bar in the top third of the picture. Improves with increasing working time. (257325EK SBR repair tip)
• CH LED flashes. Various unprompted functions.
• The picture is not straight (vertically). (part of circuit diagram displayed)
• Appliance runs for a few days and then switches off. (+ extract of circuit diagram)
• Occasionally no command or dropout of sound/picture. (with circuit diagram extract)
• No channel input possible. The display does not switch over to channel.
• Horizontal transistor fails.
• No function. Fuse Si1651 (2A) is defective. (+ extract of circuit diagram)
• Flickering picture.
• The power supply does not start up at 210V but at 230V. (with circuit diagram extract)
• Can not be switched over by RC. RC OK.
• 140V can not be adjusted.
• Delay line adjustment.
• Focus varies.
• Shuts down. (extract of circuit diagram attached)
• Poor synchronisation. Muted audio. Line tearing.
• No picture. Sound, high voltage and other functions are ok. (+ extract of circuit diagram) (257325EK SBR repair tip)
• Does not function well. Programme numbers change spontaneously, switches to stand-by etc (service info for SBR -257325EK)
• No audio. via tuner. OK via SCART .
• Occasionally brightness flickers when changing scene, then becomes stable again with the next scene. (part of circuit diagram displayed)
• The power supply stops when the appliance has been switched on. Fuse 1601 has been checked. Secondary has been unplugged in the same way. (with circuit diagram extract)
• Supply overloaded (set peeps). (part of circuit diagram displayed)
• Adjusting option (from AG06).
• No E-W correction. Can't be adjusted.
• Teletext faults. Characters wrong.
• White screen. Flyback lines. Switches off by itself. (extract of circuit diagram attached)
• BUT becomes repeatedly defective.
• Poor synchronisation. when cold.
• After some time the appliance goes into standby. During channel search the numbers run through the display very quickly and the appliance remains in stand by.
• Horizontal line, broader than a picture line. (extract of circuit diagram attached)
• Dark screen. Reduced horizontal size. at top. (257325EK SBR repair tip)
• Poor sync. Horizontal lines which are more or less strong according to the picture unit. (257325EK tip from SBR)
• Rattling in standby mode.
• Raster IC TDA3653AQ constantly goes defective (sometimes after a week, sometimes 3 weeks). Voltages are correct. (with circuit diagram extract)
• Picture shifts.
• No start up. High pitch noise is audible.
• Display flashing. Picture reduced to bottom area.
• Failure of line output transistor. (extract of circuit diagram attached)
• Whistling. (extract of circuit diagram attached)
• Vertical line at switch on. When warmed up, a black band of 7 or 8 cm appears in middle of screen. Then everything OK.
• Overvoltage protection is on (from AG 04). (257325EK tip from SBR)
• The brightness, contrast, colour and sound commands do not function. (with circuit diagram extract)
• When changing the bands, ie from band 1, 4 or 5 to 3 or interband S1-10 there is sometimes no picture.
• Dark screen with slightly lit horizontal zone at top of picture. Spot in middle of screen at switch off. Sound ok. (picture attached)
• Purple picture after loose connection of brown wire to picture tube base and aquadag coating. Colour changes to white with intermittent flyback lines. Picture contents in background but distorted then they disappear.
• Black vertical bars (approx. 20cm wide) on the top of the picture. At times only vertical white stripe a t the bottom. No vertical deflection.
• Wobbling picture and whining sound depending on picture content.
• Sound but no picture, horizontal bar 2cm from the top of the tube. The picture appears after working for a few mins. (with circuit diagram extract)
• No start-up. (+ extract of circuit diagram)
• Set dead BUT12 chopper transistor S/C. (with circuit diagram extract)
• No picture (when cold).
• There is radiation on the channel selector. (257325EK SBR repair tip)
• Sometimes no function or micro cuts in picture/sound. (with circuit diagram extract)
• Occasionally the appliance switches off or does not function at all. The power unit hums. (part of circuit diagram displayed)
• On some program sites only the left yellow LED flashes. Does not store.
• Lines are stretche in upper picture area (only in cold condition).
• No sound. Stations seem to run away. (extract of circuit diagram attached)
• Picture changes jerkily. Tuning voltage changes. Error occurs most of the time in the first mins. May also only occur with individual programs. (+ extract of circuit diagram)
• Dead. At power up slight whistle in FBT. (part of circuit diagram displayed)
• Vertical line (only in cold conditions). (part of circuit diagram displayed)
• Brightness trembles at start up for approx. 15 mins or on lighter backgrounds. Then everything returns to normal. (+ extract of circuit diagram)
• No sound in PAL.
• Poor picture because the appliance keeps searching for channels. A good synch. pulse is not present on Pin 28 of the tuner.
• No brightness or picture. (part of circuit diagram displayed)
• No Nicam sound. All other fm sound ok. (part of circuit diagram displayed)
• Stripes in picture. at top.
• Cut-off adjustment.
• Vertical foldover at bottom.
• Horizontal line at start up then raster amplitude develops slowly. Which IC is the raster generator ?
• 140V too high, cannot be adjusted.
• BU508 fails repeatedly. (with circuit diagram extract)
• Failure of line output stage. (picture attached)
• Picture shrinks when brightness is set at max level.
• Faulty raster. (with circuit diagram extract)
• Coloured half line. F3 appears in the display.
• No tuning. (+ extract of circuit diagram)
• Black picture at first then white at the top. Sound is fine and sometimes a picture after approx. 30 seconds. (with circuit diagram extract)
• No contrast control. (+ extract of circuit diagram)
• Poor contrast and pale picture. (with circuit diagram extract)
• No VHF channels.
• High voltage BUT11 blows after about 5 minutes. (extract of circuit diagram attached)
• Black picture after switching to teletext. When switching back the picture slowly comes back. (extract of circuit diagram attached)
• No picture. Bright , green stripes in picture. Sound available.
• Bass control is insufficient. (extract of circuit diagram attached)
• Vertically non-linear picture. Picture is stretched at bottom and top side. (part of circuit diagram displayed)
• Back up battery fails regularly.
• When the voltage becomes more than 140V, the BUT explodes.
• Starts up and switches off immediately. Display defective, no standby LED and power supply hums.
• Switches to protection mode (intermittently). (SBR - 257325EK information)
• Switches to protection mode. PSU whistles.
• Sound disappears on Canal Plus and intermittently.
• Occasionally colour saturation. (with circuit diagram extract)
• Intermittent picture, first OK, then snow.
• Whistling from PSU.
• Does not stop at channels during automatic search.
• Remains in standby. When forcing switch on, occasionally appliance starts but number "8" appears on display and no channel changing. Only raster.
• Half of picture present or no brightness. (with circuit diagram extract)
• Memory loss. intermittently. (+ extract of circuit diagram)
• Audio control IC TDA8421. (picture attached)
• Noise from the HV transformer in standby. (+ extract of circuit diagram)
• Line transformer fails.
• Switches to standby (intermittently). (with circuit diagram extract)
• Option code lost.
• The speakers are defective.
• Half of the picture is a black space which runs to the top half. After 1 min. it becomes smaller and pulls to the left. Picture is then fine.
• Black screen. (with circuit diagram extract)
• Teletext shakes vertically. When switching channels the top of the screen momentarily moves horizontally.
• Blank picture. Picture begins to appear if left on for a long time, about two inches from the bottom of the screen. (extract of circuit diagram attached)
• Horizontal synchronization adjustment. (257325EK tip from SBR)
• Enter service mode. (257325EK tips)
• No colour (intermittently).
• Adjustment memory is lost when using green key (preferential adjustments) from front panel or RC. All adjustments are at 0 level and picture is missing. (service info for SBR -257325EK)
• White screen. Flyback lines. at start-up.
• Picture with horizontal stripe, then it disappears after short while.
• At the beginning the picture always disappears for a short time as if the channel had also disappeared for a short time. (with circuit diagram extract)
• Focus potentiometer keeps burning out. No shorts (also no UG2 short).
• All voltages on the secondary side are too low. U instead of +140V only 80V. (with circuit diagram extract)
• After switching on the appliance makes a singing noise. (extract of circuit diagram attached)
• BUT18AF blows even when power transformer replaced. (extract of circuit diagram attached)
• When picture is dark, it begins to tremble as does the sound. (with circuit diagram extract)
• Tunes channels only after a while.
• R369 and R3620 burn at switch on, D1577 goes S/C and transistor heats up. (part of circuit diagram displayed)
• Muted audio. intermittently. (part of circuit diagram displayed)
• If cold, it detunes in VHF, horizontal line in picture.
• Volume changes with the picture content. Sound distorted. (extract of circuit diagram attached)
• Frame IC (TDA3654Q) destroyed after a few hours/days.
• No switching to standby. Red LED on. Lines cave in. Appliance hums. Picture present. Can be switched on again with the RC and runs ok. (SBR - 257325EK information)
• Black screen. Audio OK .
• R3620 and R3616 are burnt. Resistors are in the RC-section 140V to the line transformer, collector 2SD1577. Transistor is ok, no s/c can be measured.
• No picture but high voltage. The line transformer whistles.
• Black screen when cold. Picture appears at the bottom then moves gradually over rest of screen. (part of circuit diagram displayed)
• At switch on BUT12 and fuse blow. (picture attached)
• No start-up. when cold (intermittently).
• Channel 52 is indicated on all stations although the correct channel has been entered. (with circuit diagram extract)
• During scart switching, terrestrial channel can be seen on the background. Snow on untuned channels. (with circuit diagram extract)
• Either commands are blocked intermittently, IC7830 starts up, or occasionally small interruptions in the sound and picture or the PSU pumps now and again. (extract of circuit diagram attached)
• Picture vertically inverted in middle of screen.
• Hum in audio. (with circuit diagram extract) (257325EK tips)
• Commands of the remote control do not function but operating the appliance manually is ok.
• Green tinge in picture. (part of circuit diagram displayed)
• Checking the power supply. (picture attached) (257325EK SBR repair tip)
• Sawtooth on picture and hum. E4 on display at start up then normal channel. (extract of circuit diagram attached)
• Line transformer whistles, no display. (service info for SBR -257325EK)
• Error message F6 appears on display.
• No function, PSU sings, protective circuit. (picture attached)
• All vertical edges in picture are wavelines.
• Picture is blank, appears after several mins with vertical fault (linearity or height).
• No line drive. (picture attached)
• Fuse 1651 and BUT12A (Ref:7687) are defective. (part of circuit diagram displayed) (257325EK SBR repair tip)
• Lines in picture. at top.
• PSU chirps.
• Does not tune on channel. Channels can be recognised, but appliance continues to search. (part of circuit diagram displayed)
• When the volume is loud the picture is wavy vertically in rhythm with the sound. (with circuit diagram extract)
• No sound and no video. Video and sound go via scart. Picture is unstable and runs through. (+ extract of circuit diagram)
• R3654 is defective.
• Bars in picture.
• No TXT.
• Dark screen. No brightness.
• No shutdown with RC. RC OK. (part of circuit diagram displayed)
• TXT has swaying (S shape). (part of circuit diagram displayed)
• Light band in top of picture.
• Negative picture. Flyback lines.
• Low audio. at high volume. (extract of circuit diagram attached) (SBR - 257325EK information)
• The power supply fuse and transistor BUT12A are defective about once a week. (part of circuit diagram displayed)
• Intermittent colour. when cold. (part of circuit diagram displayed) (SBR - 257325EK information)
• Horizontal centre adjustment.
• Shuts down (after warm-up).
• BUT 12A is defective.
• Excessive red. Flyback lines.
• Low sound or no sound at all. (part of circuit diagram displayed)
• No picture, no sound. Appliance whistles (chirps) and emits smoke.
• 50V instead of 140V on the line output transformer BU. (with circuit diagram extract)
• White lines or black bars, which disappear slowly. (part of circuit diagram displayed)
• Character error.
• The power voltage increases, cannot be controlled with pot R3715. (+ extract of circuit diagram)
• PSU whistling at switch on. Sometimes starts up after a few mins. Ok when warm. (picture attached)
• The picture is white and shows flyback lines. The appliance goes to protective circuit. (extract of circuit diagram attached)
• High pitched audible tone. SMPS and line output transformer with line output transistor OK.
• + 140 V not present. (with circuit diagram extract)
• Top of picture is stretched. Raster defective. (part of circuit diagram displayed)
• Poor picture. Tuning drifts.
• R3638 and 3639 fail.
• Switches off by itself. after a few minutes. Squealing noise.
• Purity fault. (picture attached)
• No picture if the appliance is connected via a scart cable.
• On switch on, the speaker rattles and no other function. When the speaker switch is pushed, the set functions ok.
• Black screen on encrypted Canal Plus. All other channels OK, even Canal Plus, if decoder is unplugged. (257325EK tip from SBR)
• Picture disappears. Fault occurs only for approx 15mins, then appliance functions normally.
• Programming of the EEPROM after replacement.
• Black bar at bottom, or no raster. (picture attached) (257325EK tips)
• No colour.
• How to programme standart values after battery replacement.
• No channel search. Blurred picture, starts from program site 0.
• Pincushion distortion. (with circuit diagram extract)
• The picture has a blue glow. (extract of circuit diagram attached)
• Linearity fault. Approx 10cm of the picture is missing below. (with circuit diagram extract)
• Picture deflection is too weak at the start, however gets better after warming up. (part of circuit diagram displayed)
• Hum in sound. Sound only comes through quite quietly. (with Chassis 2B version 3). (extract of circuit diagram attached)
• Screen saturated in green (looks like defective tube). (with circuit diagram extract)
• No picture sync when changing channel (chassis index AG07) with aerial signal higher than 10mV.
• Green picture. Flyback lines. (part of circuit diagram displayed)
• Wavy picture. Does not switch to standby.
• Picture disappears and comes back progressively or takes 30 minutes to come back. Black screen. Sound OK. (257325EK tips)
• Set hiccups. (with circuit diagram extract) (257325EK tips)
• White screen. Flyback lines. after start-up. Shuts down. after a while. (extract of circuit diagram attached)
• No channels. No decoder function. intermittently. (SBR - 257325EK information)
• Appliance had dry joints on the line transformer. BU508 AF had s/c. After replacing transistor it cut out again when switching on, although the dry joints, which must have been the cause were removed. (+ extract of circuit diagram)
• Red, green or blue flyback lines through the picture. (+ extract of circuit diagram) (257325EK tip from SBR)
• Option changed, only UHF tuning.
• No function. Appliance whistles, protective circuit switches PSU off. BU in the line deflection is defective. Display is dark. (with circuit diagram extract)
• Picture does not synchronise correctly horizontally. No sound. If appliance runs for approx 2 mins, synchonisation appears slowly but still no sound. (257325EK SBR repair tip)
• Vertical fails, stripe or partial picture.
• Blue haze over picture. (part of circuit diagram displayed)
• No synchronisation (after a few seconds). (+ extract of circuit diagram)
• Hyperband channels adjustment.
• The power supply is low.
• Black picture.
• Vertical line. (with circuit diagram extract)
• Lacks height then slight clicking. Slight whistling from the line transformer. BU508AF (7618) is defective. Replaced but heats up and blows. Periphery appears to be ok.
• Initially, large white dots behind bright picture contents, followed by jump to stand-by.
• No picture or sound. Goes to safety mode. Whistling. Line transformer ok. (with circuit diagram extract)
• Unstable picture. intermittently. Noise in picture.
• Excessive green. Flyback lines. (+ extract of circuit diagram)
• Vertical fault. when cold. (part of circuit diagram displayed)
• Occasionally BUT12A blows. (257325EK tips)
• No operation. (with circuit diagram extract)
• Power supply can only be controlled between 145V and 160V. (picture attached)
• The stand-by LED on the remote control often flickers without function. The sound increases and the display shows F1 or F2. (extract of circuit diagram attached)
• No HV. (extract of circuit diagram attached)
• Stops and twitches after short time.
• Incorrect regulation of voltage on +140V line.
• 6MHz adjustment - Audio section. (257325EK tips)
• No sound or picture. Dark screen. EXT green light on. Scanning present. (with circuit diagram extract)
• No vertical deflection. (+ extract of circuit diagram)
• Wavy picture. (257325EK tip from SBR)
• No deflection adjustment. Falls from max to min.
• Tuning drifts. (picture attached)
• Weak picture. TXT OK. Contrast is adjustable but cannot be set properly. (with circuit diagram extract)
• After replacing line transistor appliance begins to whistle. Line transistor fails again immediately.
• No raster, green line in centre. Power supply OK. (+ extract of circuit diagram)
• No vertical synchronisation. when cold.
• BUT11AF has blown, replaced then nothing. No power supply. BUT11AF(7687) already changed twice in four months. (part of circuit diagram displayed)
• Occasionally no start up or only after an extended switching on period. (picture attached)
• Dark picture or half of picture is bright and half dark. (picture attached)
• Max line amplitude, max E/W correction, no adjustment possible. (part of circuit diagram displayed) (257325EK tips)
• With brightness at max., raster cramps. (with circuit diagram extract)
• Stereo signal disappears. (189,25MHz) only with reception on channel 7.
• Picture collapse depending on volume.
• Repeated failure of the line output transistor (7618), and or triggering of the thyristor (6698). (with circuit diagram extract)
• Defective PSU. (with circuit diagram extract)
• Memory contents (X2402) change at random.
• Picture varies when volume high. (picture attached)
• No line synchronisation at top of picture during channel switch over for 2 or 3 seconds and during program broadcast. (+ extract of circuit diagram)
• When switching over to another channel, station disappears for a short time. Possibly pulsating.
• TV starts and displays E3. Front controls and RC do not function. (extract of circuit diagram attached)
• Fuse 1657 is defective and no picture.
• Black screen. After 5 mins white line on lowest third of CRT. (part of circuit diagram displayed)
• In AM sound slight nasal sound and buzz.
• No picture. Audio OK . (extract of circuit diagram attached) (257325EK tips)
• Raster appears slowly. (part of circuit diagram displayed)
• Flyback lines in a certain colour. Blurred picture. (+ extract of circuit diagram)
• No sound on both channels, only via scart. (extract of circuit diagram attached) (257325EK tip from SBR)
• No vertical deflection. when cold. (picture attached)
• Poor vertical linearity, it improves as temperature increases.
• No picture. No audio. HV OK. .
• PSU blows.
• Nasal sound on some channels.
• Picture has very bad distortion (notches on the sides). Noises in the sound. In the line end stage all secondary voltages are approx 10% too low.
• Trembling picture, just on some channels. (+ extract of circuit diagram)
• Hum in standby. No errors determined while operating. (+ extract of circuit diagram)
• Ground noise in sound. (with circuit diagram extract)
• Low audio.
• Colour saturation too low in 2B + CTI. (extract of circuit diagram attached)
• Contrast control is defective. Picture has red shadow streaks.. (+ extract of circuit diagram)
• No raster. when cold. (picture attached)
• No function. After switching on protective circuit responds. Appliance beeps quietly. (+ extract of circuit diagram)
• Dark screen, CAD functions, the channels are towards 80. No memorization.
• Option adjustment. (SBR - 257325EK information)
• BU508AF defective, changed but heats up abnormally. Standby light flashes.
• Tearing depending on picture content. Vertical synchronisation is unstable. The brighter the picture content, the more stable the picture. (+ extract of circuit diagram)
• Grey picture when contrast and brightness are at maximum. No sound or picture via scart. (SBR - 257325EK information)
• Crackling from speakers, especially after switch on.
• No audio. OK via SCART . (extract of circuit diagram attached) (257325EK tips)
• Sound level increases strongly intermittently. Appliance switches to Programme 1. LED on TV is flashing.
• Cuts out occasionally after 30 seconds. (service info for SBR -257325EK)
• Picture fades and sound hums. (picture attached)
• Distorted audio. (with circuit diagram extract)
• Insufficient picture height, rises slowly. Is fine after a few minutes. (+ extract of circuit diagram)
• U140 ok with mains 160V, with 220V mains control range U140 is 145V and more. (picture attached)
• Dark screen. No sound. EHT present. 140V,13V ok. All voltages ok. (part of circuit diagram displayed)
• After plugging in a defective scart cable there is still only a bluish shimmering picture. IC4850 has already been replaced. (part of circuit diagram displayed)
• Displays F1 after a short time. Operation is blocked. (extract of circuit diagram attached)
• Distorted picture when cold in top third of screen. Picture gradually returns to normal after 10 mins. (extract of circuit diagram attached)
• Dim picture. No contrast control. Audio OK . (part of circuit diagram displayed)
• A second after switch-on with mains switch a beep is heard in speakers.
• At first BUT12 and T7686 defective. (+ extract of circuit diagram)
• Pincushion distortion. on sides. Excessive horizontal size. Knock sensitive. (with circuit diagram extract)
• Low contrast. Picture too small. (picture attached)
• This Nicam set stuck in standby and the power supply is tripping.
• BUT12 S/C at start up. Changed as well as line transformer, CNX62. No start up of HT.
• Stuck in standby. (extract of circuit diagram attached)
• No functions. Standby LED lit .
• Intermittent audio and picture. Intermittent audio and picture. (with circuit diagram extract)
• Intermittent interference on channels 5 and 12. Only when changing channels.
• One colour missing. (part of circuit diagram displayed)
• Reduced vertical size of image at top and bottom. Cannot be adjusted to normal.
• Begins to whistle after approx 2hrs. If switched off then on again, it runs again for 2hrs. (with circuit diagram extract)
• No sound, display flickers (apparently in rhythm of audio signal). Picture is OK.
• Only one horizontal stripe. (with circuit diagram extract)
• Picture appears slowly. Audio OK . (part of circuit diagram displayed)
• No contrast control. Flyback lines. (+ extract of circuit diagram) (SBR - 257325EK information)
• Blurry picture.
• Line end stage does not start oscillating.
• "E3" is displayed and 140V power supply is low. (+ extract of circuit diagram)
• Teletext decoder adjustment.
• Narrow and short line on the top. Dark screen.
• TXT stops on page 100.
• The sound is broken up by scart or by the tuner. (SBR - 257325EK information)
• Squealing from PSU. (with circuit diagram extract)
• Zigzags in picture and hum in sound. (+ extract of circuit diagram)
• High voltage BU fails constantly.
• Change of Pal/Secam for Middle East and Morocco.
• No MONO audio. STEREO OK .
• Vertical pass out at the bottom of picture. (+ extract of circuit diagram)
• Incorrect display. TXT and lines disappear. (257325EK tip from SBR)
• Sometimes appliance switches on and occasionally it goes to SAFETY mode.
• Picture still visible in standby. Sound and display inactive. (+ extract of circuit diagram)
• Display flickers. (service info for SBR -257325EK)
• Dark screen. (with circuit diagram extract) (service info for SBR -257325EK)
• Purple and green colours saturated. Same colour problem via scart.
• Buzzing from PSU. in standby.
• Brightness, contrast and colour will not stay in memory. (part of circuit diagram displayed)
• Refs of transistors beside the power supply BUT 12. (extract of circuit diagram attached)
• 140V only reaches 77V. With a power supply voltage of 180-250V only 77V. When disconnecting deflection lead approx 85V are set without a load. No voltage on pin 1 of optocoupler.
• No display. Contrast, colour, sound cannot be adjusted.
• Slow start-up.
• Permanently in stand by.
• Hum on standby. (with circuit diagram extract)
• White saturation with flyback lines.
• Switches to standby (after start-up).
• High audible tone. (part of circuit diagram displayed)
• No sound. Quiet buzz at maximum volume. Picture OK. (picture attached)
• No synchronisation.
• Wavy picture and hum in sound. Crackling in PSU. (+ extract of circuit diagram)
• The picture is too wide and cannot be controlled. After about 5 min. BU508 blows. (extract of circuit diagram attached)
• Voltage and type of memory battery.
• Shuts down. after start-up.
• Red tinge over picture. (extract of circuit diagram attached) (257325EK tips)
• Picture is all blue with one white stripe in the bottom section. Flyback lines are also visible. TXT is faintly visible in bottom section. (extract of circuit diagram attached)
• Display does not switch off, snow, sound cuts out. (257325EK tips)
• Only half of picture is visible on bottom side. (extract of circuit diagram attached)
• Approx 5-10 secs after switching ON, image is unsynchronised. After that period all functions OK. Same problem after each channel switching.
• Line BU heats up and blows. No line transformer or display and R3619, R3620 are burnt.
• Nasal sound with background noise. Sound ok in scart. (picture attached) (service info for SBR -257325EK)
• After operating for sometime, the appliance switches off. D6490 is open circuit. (+ extract of circuit diagram)
• Squeaking line transformer power supply and no HT.
• Picture appears after 5 to 10 mins then stays normal after that.
• Fuse 2A blows, BUT12A OK. (part of circuit diagram displayed)
• 6.242MHz adjustment - Audio section.
• No RC functions. (257325EK tip from SBR)
• No tuning in switching from UHF/VHF.
• +140V power supply voltage adjustment.
• Flyback lines and coloured smears next to images. (with circuit diagram extract)
• PSU squeaks (overload protection). (extract of circuit diagram attached)
• No raster from cold. Appears gradually from bottom of screen. (picture attached)
• When changing channels, picture is unstable and unsynchronized for a few minutes.
• No raster. Audio OK .
• BUT in PSU makes a S/C if chassis is tapped.
• Switch on for a fraction of a sec then no standby light. (with circuit diagram extract)
• Only a few characters appear on teletext. (with circuit diagram extract)
• Resistors 3619 (56R) and 3620 (56R) are burnt.
• Hyperband adjustment.
• Protection mode activated. (with circuit diagram extract)
• Hum during switching. (with circuit diagram extract)
• Foldover with bright line across centre of screen, and top stretched.
• Picture jitter and nasal sound according to picture content. (SBR - 257325EK information)
• No or intermittent start-up.
• Starts up, but shuts down immediately (Standby). Process is repeated. Numbers intermittently run through program display.
• Saturated green screen (impression that the tube is defective). (picture attached)
• Horizontal line. at top.
• Skips channels during tuning. (+ extract of circuit diagram)
• Screen is slightly red with red flyback lines. Appliance ran for 2 weeks then green screen.
• Power supply ticking fast in standby and flashing LED. Starts up from standby and works fine.
• Screen is dark, sound functions or picture only appears after picture tube has heated up for a long time.
• FBT BU (7618) is defective. (+ extract of circuit diagram)
• Picture appears slowly. (extract of circuit diagram attached)
• VHF fails or moire effect. (Possibly knock sensitive].
• Connection of a loop system to the TV.
• Only a beep audible at start-up.
• Green flyback lines on a dark picture. (+ extract of circuit diagram)
• Sparks from crowbar protection.
• Picture and sound hum for 10 mins. Power BU blows one time out of ten. (extract of circuit diagram attached)
• RF radiation affecting band 2.
• Bright picture with flyback lines for a short time, then cuts out. (extract of circuit diagram attached)
• Voltage in PSU cannot be adjusted under 150V.
• VIP TXT decoder with SAA5230 or SAA5231. (extract of circuit diagram attached)
• Bracket under line transformer.
• No start-up. when cold.
• TS7687 fails again. (picture attached)
• Picture compressed at bottom and expanded at top of screen. White line in middle of screen. Usually ok when appliance is warm. (extract of circuit diagram attached)
• The sound hums, the signal only comes through quietly. (with circuit diagram extract)
• No vertical or horizontal synchronisation. B/W picture. Cracking from loud-speakers at switch on. (part of circuit diagram displayed) (257325EK tip from SBR)
• After replacing defective BUT12 power supply sings for a short time. If you pull out the deflection plug the fault is still there. If you measure for 140V only 13.5V are present. Horizontal power transistor has already been replaced.
• Tripping (intermittently).
• Bright line in the to third. It disappears if appliance is warm. (extract of circuit diagram attached)
• Short hum at switch over. (picture attached)
• No start up. Standby LED does not light up.
• Greyscale adjustment.
• No picture. No sound. Scart LED flashes in front.
• Picture pumps/flashes, buzz in sound. (with circuit diagram extract)
• Error codes. (part of circuit diagram displayed)
• When switching on the PSU whistles and in the high voltage unit R3620 blows. (with circuit diagram extract)
• No reaction to IR receiver. User control OK. (SBR - 257325EK information)
• Black bar. at top. OK after a while . (part of circuit diagram displayed)