3703 / SBR [TV]

• A strange noise is audible only in the first few mins of operation.
• No picture, just noise.
• Output available, but no reaction to RC.
• Contents of memory lost.
• Defective transistor TS7355. (+ extract of circuit diagram)
• Replacing the programme selector unit. (3703 tip from SBR)
• Appliance trips when cold.
• Protection circuit active (set hiccups).
• Contrast is weak on TV, picture is missing when mixed and teletext is ok.
• Headphone cover 4822 432 91312. (3703 SBR repair tip)
• Screen is dark. Loud noise.
• No picture. White raster.
• The sound density is instable.
• Loss of sound. Also loss of picture and/or hiccups. Intermittent fault.
• No picture, eht and focus supplies present.
• Resistor 3170 burned o/c. No audio TDA2611AQ destroyed. If IC and resistor is replaced, will destruct in minutes.
• No colour and appears to have unresolvable grey-scale tracking errors.
• No picture, sound OK.
• Flyback line on top of screen.
• Poor focus.
• Dead due to a lightning strike.
• Supply voltage +125V adjustment.
• Picture jitter and "motor-boating" sound. (3703 tip from SBR)
• Blank raster.
• Power supply will not start.
• No contrast.
• During station search the tuning does not stop when a station has been found (continuous searching).
• Upper TXT line doesn't show hour, only page number.
• Intermittent.
• Jagged verticals.
• Unstable tuning.
• Teletext lines visible at top of picture.
• No remote control or front keyboard functions.
• Unstable picture with appliance ticking.
• (Pg 1 of 2) Dead.
• Code numbers for locking HT and focus cable.
• Set ticks with monentary loss of picture and sound.
• No or low luminance, low contrast and very poor picture.
• No UHF reception. VHF reception OK.
• Patterning on colour.
• Intermittent frame linearity or low height. (SBR - 3703 information)
• Greyscale adjustment.
• CRT cut-off adjustment. (3703 SBR repair tip)
• Vertical collapse.
• TR7562 (BU508AF) S/C.
• No start-up.
• Dull white picture.
• No picture.
• How to change and store analogie values (normal values/basic values).
• Picture darkens intermittently.
• Hum noise on VCR channel.
• Dead. LED blinks once.
• Will not tune on some channels.
• No picture during muting, the sound is present.
• Coloured patterning.
• No or low luminance, low contrast, very poor picture.
• No RC or front keyboard functions.
• Poor interlace with part of picture blanked out.
• Connection of a loop system to the TV.
• On/off switch arcing.
• Tripping when cold.
• Safety test after repair.
• Reduced height, rolling and lack of contrast.
• Horizontal sync. instability which varies according to picture content.
• Aerial connection in 14" and 16" appliances produced before week 309.
• Replacement of tuner ECL2006 with UV418.
• Tuning of cut-off points on picture tubes.
• Forgotten resistor can destroy transistor TS7355.
• Interference stripes.
• Power supply voltages are too high.
• No noise and no contrast.
• PSU transistor and horizontal output transistor are S/C immediately after start-up.
• Picture pulls in play.
• Picture has wide horizontal bands which can be intermittent.
• Line output transistor TR7562 repeatedly fails.
• Coil 5355 jumps immediately after the set has been turned on.
• Voltage supply is too low.
• No picture, only sound after switch on.
• No colour.
• Video is missing, when brightness is turned up the raster is blank.
• Failure of transistor BF422 (7353).
• No sound or picture, screaming from line output transformer.
• No vertical deflection. Line end stage whistles. No picture and sound.
• The appliance does not function, the power supply gurgles. (SBR - 3703 information)
• Occasionally colour drop out.
• The appliance is tripping.
• Protection circuit active.
• Intermittent frame linearity or low height.
• No functions.
• No picture. Rushing sound.
• Vertical synchronization adjustment.
• No picture or raster. Loud hum from speaker.
• The set is continuously in stand-by. (3703 SBR repair tip)
• Picture intermittently moves up and down.
• Horizontal lines at left hand side. Faint picture if brightness increased. (3703 tip from SBR)
• No signal.
• Programme selector switch assembly.
• No raster. Distorted audio.
• Colour is too red, green or blue and shows flyback lines.
• Sometimes fails to come on plus when no memory.
• Interlace is poor and part of picture is missing.
• Interference lines with colour picture (especially on UHF). The black/white picture is fine. (3703 tips)
• Switches to standby (intermittently).
• Noise in picture and sound. No response to signals such as channel search. Battery OK.
• PAL delay line.
• No remote control or front keyboard functions.
• Contrast is poor.
• Intermittently picture and sound are missing.
• Frame flyback lines run down half of the picture.
• No TXT.
• Contents of memory lost.
• EHT cable may cause HT flashover.
• The operation voltage is too high when plugged in.
• Line pulling, unstable on VCR PB.
• Line tearing.
• Reduced picture. Intermittent clicking.
• The power supply does not work correctly, the 125V is too low.
• The picture does not stand still.
• Does not stop in search tune mode.
• The sound gurgles and squeaks.
• Picture and raster are missing. Loud hum from speaker.
• Dead, standby lamp is on.
• No search stop.
• Drift and incorrect tuning.
• Intermittent no channel lid's and snowy picture.
• Intermittent wide horizontal bands over picture.
• Intermittent loss of stations and LED display.
• After switch on appliance functions perfectly for only 1-2 mins then sound disappears. Brightness is too low. Current consumption is too high. (3703 tip from SBR)
• The appliance fails.
• The TV cannot be switched on.
• Lack of width, low contrast and rolling.
• Poor picture quality and/or ghosts.
• The picture is distorted, more or less depending on the station tuned in to. (Audio signal).
• Loss of line sync.
• E/W disappears now and then.
• If the picture is too bright it rolls.
• Faulty colours during teletext.
• Horizontal synchronization adjustment.
• Picture blanking at top.
• No vertical deflection.
• Sub carrier oscillator adjustment. (3703 tips)
• No picture (intermittently).
• No sound or vision.
• (Pg 2 of 2) Dead.
• Dead. T2A o/c.
• Rolling when brightness or contrast is varied.
• Low 12V line. Checked diode for S/C but found normal.
• Brightness, colour and VOL incorrect or goes to minimum level at switch on.
• S/c at pin 12 of the line output transformer.
• Tripping.
• Failure of T7355.
• Moire effect in colour.
• No picture and sounds like a radio.
• Lines in picture.
• Reduced vertical and horizontal size.
• Insufficient width with bowing at the right-hand side. (3703 SBR repair tip)
• Vertical stripes in the left picture side in case of poor aerial signal.
• Poor picture.
• No vertical synchronization.
• µP 7660 does not function, control is dead.
• Vertical jitter.
• Appliance will not switch on after water has seeped in. (3703 tip from SBR)
• At switch on picture tube's heaters glow and EHT increases. No raster and loud hum from speaker.
• Faulty colour.
• No video. Blank raster with brightness control turned up.
• TV switches off occasionally.
• Top part of picture blank, bottom quarter ok.
• No colour and incorrect greyscale.
• After switch on appliance functions perfectly for only 1-2 mins then sound disappears. Brightness is too low. Current consumption is too high.
• No sound or vision.
• No sound or vision with a screaming noise coming from the line output transformer (the BU508 line output transistor will go S/C if the set is left on for more than a few seconds.
• Sound muting switch.
• Reliability of T7355.
• Picture loss. Also loss of sound and/or hiccups. Intermittent fault.
• Picture moves in time to sound from loudspeaker.
• The TV does not switch on.
• Left hand side of screen has a horizontal line. If brightness levels are increased a faint picture appears.
• Low audio.
• Hiccups and/or loss of sound and picture. Intermittent fault.
• Colour is missing, gradually gets better.
• No reaction when using the remote control.
• No display.
• Dead.
• One colour is missing by TXT.
• One of the 3 colours (RGB) missing.
• Teletext lines visible at top of picture.
• Loss of field sync.
• No picture or sound. Intermittent blank raster.
• Line scan is missing.
• No video just a grey raster.
• Stops on standby.
• Vertical stripes on the left by poor aerial signal.
• How to adjust minimum volume.
• No sound or vision.
• Colour fluctuation.
• After being switched on a large picture is visible and then immediately after, BU508 fails.
• Ragged verticals.
• No picture. Sound available.
• Whistling.
• On/Off switch arcs and splutters but set remains dead after a new switch is fitted.
• No switch-on.
• No line scan. (3703 tip from SBR)
• Intermittent hiccup when changing picture (strong changes in beam current).
• Contrast adjustment.
• No picture and no sound. The voltage is present.
• This chassis uses a TDA2577 as sync/field chip.
• The upper edge of the picture is dark.
• No audio.
• No tuning.
• Insufficient height, rolling and lack of contrast.
• Double, hazy picture.
• Unstable tuning; search does not stop on the stations.
• AVR RF adjustment.
• The appliance cannot be operated.
• 125V rail is low.
• Loss of all channels at switch off. OK from standby.
• Line output transistor Tr7562 continuously fails.
• Poor interlace/part picture is blank.
• Weak contrast.