63KE6722 / SIERRA [TV]

• White screen, no sound. An "E" appears on screen. When connecting TV, no. 1 appears, but instantly switches to E.
• No contrast. Poor colour. (extract of circuit diagram attached) (SIERRA - 63KE6722 information)
• Whistling. after warm-up.
• Stripes in picture. Knock sensitive. (extract of circuit diagram attached)
• Rippling jagged verticals. (extract of circuit diagram attached)
• Blue picture. when changing channels.
• Blue screen. Flyback lines. Fault occurs intermittently. .
• Dark picture. Audio OK . (extract of circuit diagram attached)
• Defective vertical linearity. Shading at bottom of picture. (+ extract of circuit diagram)
• No picture. (+ extract of circuit diagram)
• BU508 S/C. (extract of circuit diagram attached)
• Negative picture with black smear on sides of pictures. (SIERRA - 63KE6722 information)
• No synchronisation.
• No audio. after a while. Hum in audio. in standby. (with circuit diagram extract)
• Signals to BUT11 in PSU and the four 300V diodes are occasionally defective. (63KE6722 tip from SIERRA)
• Dark picture. (part of circuit diagram displayed)
• Dead. F1 on display. (picture attached)
• Low contrast in picture, impossible to adjust contrast. No sound intermittently. (picture attached)
• Intermittently functions out of control and no channel memory.
• Slow to start up 20-30 mins, squealing from line stage. (part of circuit diagram displayed)
• Horizontal scanning in middle of screen (foldover) with blurred stripes. (with circuit diagram extract)
• No picture. intermittently. (+ extract of circuit diagram)
• Significant shifting of picture and black band on the left side of the screen. (picture attached)
• Erratic start-up.
• No display. after a few seconds. No front panel function. No RC functions. (with circuit diagram extract)
• No brightness. No contrast. (part of circuit diagram displayed)
• TV picture remains when standby selected. Sound is muted and red standby LED comes on. (part of circuit diagram displayed)
• Three small lines at centre of tube. At switch off discontinuous faint vertical bar, burnt screen. (picture attached)
• At switch on picture is missing. Contrast builds up slowly over about an hour. (+ extract of circuit diagram)
• White stripe on left. (+ extract of circuit diagram)
• Intermittently switches off and picture moves horizontally.
• Blurry picture. Noise in audio.
• Brightness varies. (extract of circuit diagram attached)
• Black screen. (part of circuit diagram displayed)
• Connection of a loop system to TV.
• Black screen. Audio OK . (+ extract of circuit diagram)
• Memory loss only on channel numbers 1, 2, 3. All other functions are correct. (with circuit diagram extract)
• Dead. (with circuit diagram extract)
• Switching transistor TR7665 (BUT11AF) in the PSU is S/C. (part of circuit diagram displayed)
• 140V rail fails after 5 minutes. (+ extract of circuit diagram)
• 1mm curl in vertical lines. (+ extract of circuit diagram)
• Picture has flashing line across. (+ extract of circuit diagram) (63KE6722 SIERRA repair tip)
• Does not switch to standby. intermittently.
• No sound. Dark screen. Jerky noise in speaker when pressing volume.
• Replacing control IC7840. (picture attached)
• Poor contrast, reduced width with ripples down picture. (part of circuit diagram displayed) (SIERRA - 63KE6722 information)
• Sawtooth on vertical lines and 'water drop' effect. Fault improves slightly when appliance is hot. (picture attached) (63KE6722 tips)
• Intermittent arcing noise with loss of adjustments or goes into PAL or cuts out without the standby light. (with circuit diagram extract)
• Flashing picture. when cold. (with circuit diagram extract)
• Black vertical lines in picture. (extract of circuit diagram attached)
• Picture rolls. (+ extract of circuit diagram)
• Loud audio (after start-up). Does not alter when ± volume button is pressed. (with circuit diagram extract) (service info for SIERRA -63KE6722)
• Corrugated verticals. (picture attached)
• Poor RC sensitivity. (picture attached)
• Irregular chirping sounds from the power supply, is not stable in stand-by.
• Low brightness and line ripple. (picture attached)
• Arcing. after a few seconds.
• In standby PSU fails and destroys BUT11. (extract of circuit diagram attached)
• Ticking noise. at start-up (intermittently).
• Picture is too narrow. Vertical wavy lines. (part of circuit diagram displayed)
• No vertical deflection. Line in the middle of frame which does not reach edges.
• Intercarrier rattle in the sound. (with circuit diagram extract)
• No audio. when cold.
• Irregular flashing when picture appears. Starts up normally at switch on.
• EHT flashovers. (picture attached)
• Intermittent loss of power, picture going off for a split sec and display flickers.
• Picture goes off occasionally or repeatedly flashes off and on. (part of circuit diagram displayed)
• No sound in IF, except when pressing volume ± button. (with circuit diagram extract)
• Short picture breaks (white picture). (63KE6722 SIERRA repair tip)
• Value of resistor R3628 and type of transistor 7930.
• Weak unstable vertical when cold. (with circuit diagram extract)
• Frayed picture.
• Front panel changes up but not down.
• Vertical collapse (intermittently). (part of circuit diagram displayed)
• Microcomputers and screening plate.
• No picture (intermittently). (with circuit diagram extract)
• Trips. Functions OK after a few mins. When switched off, 3 colours visible (afterglow). OK when subsequently switched on (appliance is warm).
• Spontaneously becomes intermittent, caused by interference in the power supply. The appliance gurgles. (picture attached)
• Hiccups when brightness is high.
• PSU blown after implementation of modification.
• 72V instead of 140V on secondary. (extract of circuit diagram attached)
• Oscillations in picture, horizontal stripes and oscillations. (picture attached)
• No start-up. (+ extract of circuit diagram)
• Appliance hiccups (only with white screen during playback). (picture attached)
• Initially no picture; low contrast picture after a few minutes. (part of circuit diagram displayed)
• Power supply blown or does not operate; BUT11AF failure. (picture attached)
• After operating normally for a short time some channels disappear. Frequency slip.
• Picture jitters.
• Crackling on picture. Thin black lines than increase in number when cold.
• Low supply, +65V instead of +140V. (+ extract of circuit diagram)
• Tearing or waves in picture when connecting the TV. Error present even after warm up. (part of circuit diagram displayed)
• No raster. Audio OK . (with circuit diagram extract)
• No picture. on upper half screen. (+ extract of circuit diagram)
• Dark picture. after a while.
• Poor width and poor EHT regulation. (extract of circuit diagram attached)
• At switch on screen is blurred and slightly green for a few seconds.
• Pulsates and whistling, display lit but no picture. (picture attached)
• Trips violently as picture appears.
• Wavy verticals. (with circuit diagram extract)
• Safety test after repair.
• +140V adjustment. (part of circuit diagram displayed)
• No sound. Faint picture caused by lightning. (part of circuit diagram displayed)
• Fuse (1.6) in the power supply blows instantly.
• No colours in SECAM. (+ extract of circuit diagram)
• No button operation. (part of circuit diagram displayed)
• Replacing the TXT board.
• Appliance and LED switch off from standby. When warm, display darkens and channels go out of tune. (+ extract of circuit diagram)
• Sound OK at switch on. When volume increased sound becomes unstable and distorted then cuts off 1 min later.
• Occasionally the picture pulls. (with circuit diagram extract)
• Starts up with a click when cold. Distorted picture during 1 min. Picture flickers. (part of circuit diagram displayed) (service info for SIERRA -63KE6722)
• Picture ringing plus herringbone pattern and no teletext.
• Vertical lines not linear. (with circuit diagram extract)
• Starts up, picture and sound ok. If put into standby, standby LED switches off after 5 secs, then impossible to switch on again. (+ extract of circuit diagram) (service info for SIERRA -63KE6722)
• Hiss in audio. (SIERRA - 63KE6722 information)
• Switches off by itself. intermittently. (picture attached) (SIERRA - 63KE6722 information)
• Unstable picture in TXT. Noisy characters at bottom of screen when using TXT. (part of circuit diagram displayed) (SIERRA - 63KE6722 information)
• Audio cuts off and standby LED lights up when selecting standby from RC. Picture remains normal. (part of circuit diagram displayed)
• Later chassis, no picture when first switched on. (part of circuit diagram displayed)
• BU508A defective. (+ extract of circuit diagram)
• BUT12 becomes hot and fails when switching to standby. (+ extract of circuit diagram)
• Image is overcontrolled or not standing still.
• Front buttons not changing channels or occasionally volume will not change.
• Values of resistors R3658 and R3659. (picture attached) (63KE6722 tips)
• HT varies, then powers down. (extract of circuit diagram attached)
• 09 on display. Rattling noise from speaker. (part of circuit diagram displayed)
• 5cm missing in lower part of picture. (part of circuit diagram displayed)
• Does not tune any station, scanning available but does not stop on any station cause signal is missing. (+ extract of circuit diagram)
• Fuse 1653 blown. (picture attached)
• Volume varies. (+ extract of circuit diagram)
• No picture or sound. "E" in display. PB via AV ok.
• Weak points in picture. (with circuit diagram extract)
• Snowy screen. No RC or front controls. Standby LED and display switched off. Sound and picture ok when restarting TV. (extract of circuit diagram attached)
• Intermittently switches off then comes back on after several attempts.
• The different BU types.
• Trips for a few seconds before starting up: chassis of an overmain-primary power supply circuit.
• Memory loss. only on one channel.
• Intermittently dead. (part of circuit diagram displayed)
• Appliance switches off intermittently with flashes. Sometimes channels switch over to PAL.
• Dark picture for 10 mins after switch on. Sound OK then picture appears. Loss of picture when there is a lot of white. Picture OK after 20 mins. (extract of circuit diagram attached)
• When switching TV to standby and turning it off via mains switch, it takes time to start up again.
• Starts up jerkily after 2 mins. Start up is OK when appliance becomes hot after a few minutes.
• No picture via E1/E2 SCART. No horizontal/vertical sync. Jagged horizontal and interference lines. Picture OK via RF input, except few shaky lines on top when changing channels.
• Blank picture for up to 1/2 an hour. (with circuit diagram extract)
• No reception.
• No or intermittent start-up. (part of circuit diagram displayed)
• Vertical lines are jittering, reacting on mains voltage.
• White screen, no sound. No pretuned channel switchover. (with circuit diagram extract)
• BUT11 and diode 1N5061 become S/C. (extract of circuit diagram attached)
• PSU output voltages very low.
• Blank raster. No sound. Channel display shows E.
• Vertical waves, frizzy lines. (+ extract of circuit diagram)
• Vertical lines show bleeding effect, especially after switch on. (extract of circuit diagram attached) (service info for SIERRA -63KE6722)
• R2665 O/C. (+ extract of circuit diagram)
• Poor audio.
• Whites very faded, very grey. Functions OK.
• Randomly switches off and video mute.
• Green, bright flyback line. (extract of circuit diagram attached)
• Low HV.
• Vertical lines move slowly to and fro, especially when cold. (+ extract of circuit diagram)
• At switch on channel no. displayed then goes into -E-. Impossible to change channels, OK in video.
• Information for measuring with a constantly defective BU. (picture attached)
• Output voltage is reduced. (picture attached)
• No picture, high pitch noise before failure. (extract of circuit diagram attached)
• BUT11 burnt. (part of circuit diagram displayed)
• Reduced horizontal size. (+ extract of circuit diagram)
• No raster, EHT and heaters ok. (with circuit diagram extract)
• Trips when adjusting contrast. (+ extract of circuit diagram)
• BUT11AF failed. (+ extract of circuit diagram)
• Various types of picture tubes CP90.
• Loses sound from memory when TV switched off by the switch. (part of circuit diagram displayed)
• No contrast control. No brightness control. (with circuit diagram extract)
• Break up of picture (dashes on the picture). (part of circuit diagram displayed)
• Dead. No display. No RC functions. (picture attached)
• Horizontal pulling of picture with considerable change in brightness. (picture attached) (63KE6722 tip from SIERRA)
• No tuning. (part of circuit diagram displayed)
• Pulsating picture. (+ extract of circuit diagram)
• No colour via tuner. Colour buttons do not work. Functions well in RGB via scart.
• Cycles on/off (when cold).
• Picture jumps 3 mins after start up. Occasionally it turns pink, white, blue or yellow. (picture attached)
• Waves in picture (in verticals, therefore, horizontal fault). (with circuit diagram extract)
• No sound at switch on. Picture gradually appears after about 2 to 3 mins. (extract of circuit diagram attached)
• No picture. at bottom. (extract of circuit diagram attached)
• No start up. F1 displayed. (with circuit diagram extract)
• Horizontal raster lines over entire picture. (part of circuit diagram displayed)
• Dead. after a few minutes. (extract of circuit diagram attached)
• 140V HT supply is low at 60-70V. (picture attached)
• LED goes off after 10 mins in standby. TV will not start up again but does so when cold. (picture attached)
• Switches to protection mode (intermittently). (extract of circuit diagram attached)
• Line transformer (BU508AF) blown repeatedly at start up. When it blows a noise is heard like arcing in line transformer. (+ extract of circuit diagram)
• Sawtooth picture especially when cold. (picture attached)
• Streaked picture at start-up.
• In EXT position a black vertical line appears on left side of picture. (part of circuit diagram displayed)
• Functions OK but blinking LED. Strange display. (+ extract of circuit diagram)
• Supply voltages collapse under load.
• Vertical outline drift.
• Blue picture (after warm-up).
• Hum on B/G standard.
• Blue picture (intermittently).
• No start-up. Standby LED does not light. (extract of circuit diagram attached)
• Switches to standby. (part of circuit diagram displayed)
• Chopper transistor (BUT11AF) fails repeatedly. (picture attached)
• Flashes green for a few minutes when switched on. (part of circuit diagram displayed)
• Wavy picture on vertical lines. (part of circuit diagram displayed)
• Searches for channels continuously. (part of circuit diagram displayed)
• Intermittently trips and/or reverts to channel 1.
• Intermittently, picture disappears and screen becomes black. Sound OK. (picture attached)
• Microprocessor screening plate. (picture attached)
• Picture appears slowly. (picture attached)
• Slow start-up. (picture attached) (service info for SIERRA -63KE6722)
• No HV. Audio OK . (with circuit diagram extract)
• No colour. (part of circuit diagram displayed)
• Starts up. Red LED lights up for a few secs then dead. Cycle may be reproduced some 10 secs after.
• Only 'E' on OSD.
• Attempts to start up for a second, display shows ''1'' then letter ''E'' and no start-up.
• At switch on makes flashes, short interruption when cold for 1 min then normal. (+ extract of circuit diagram)
• Fails occasionally. Display is then dark and after mains switch is switched off then on again, runs perfectly again. (63KE6722 SIERRA repair tip)
• Picture trembles vertically when cold with some programs. OK after warming up.
• BUT blows if appliance remains in standby. (picture attached)
• No vertical deflection. (picture attached) (SIERRA - 63KE6722 information)
• Repeatedly cuts out for a short time when cold. (picture attached)
• Fuse 1652 blown at start up. (+ extract of circuit diagram)
• Power supply defective.
• Canal Plus in black and white. Colour ok on other channels. Brightness ok. Colour problems after a certain amount of time. (+ extract of circuit diagram)
• No functions. Display flashes .
• 3 mins after start up, the picture turns blue with horizontal white lines then after everything returns to normal. (part of circuit diagram displayed)
• Picture is poor in the beginning, first 2 minutes as if the picture tube is defective. (with circuit diagram extract)
• PSU hiccups.
• No front panel function. No RC functions. after a few minutes.
• Flashing picture. (+ extract of circuit diagram)
• How to increase safety range. (+ extract of circuit diagram)
• Pulling at bottom of picture in PAUSE when a video with Foxtrot chassis is connected. (part of circuit diagram displayed)
• Colour spots in flat square picture tubes.
• Faint noise at switch on. (with circuit diagram extract)
• Mains rectifier reservoir capacitor C2656 failed. (+ extract of circuit diagram)
• Screen is completely blue with white flyback lines when warm.
• Dark picture (intermittently). Audio OK . (SIERRA - 63KE6722 information)
• Picture remains dark. Contrast, brightness and colour controls ok. (+ extract of circuit diagram)
• Over mains panel. (with circuit diagram extract)
• Picture bends inwards. (part of circuit diagram displayed)
• After playing a few days the fuse blows, the transistor is then defective. The fault occurs in standby. Appliance switches off after a while. (+ extract of circuit diagram)
• Picture has poor colours. Scart output ok, poor scart input. (picture attached)
• Distorted picture. No synchronisation (when cold). (with circuit diagram extract)
• No start up. No display or PSU clicks and display pumps. Hit by lightning. (extract of circuit diagram attached)
• Repeated failure of the supply. (picture attached) (service info for SIERRA -63KE6722)
• PSU oscillates. (+ extract of circuit diagram)
• No RC functions.
• Excessive horizontal size. E/W fault.
• Head does not stop.
• Weak contrast. (picture attached)
• Vertical lines serrated on all 5cm's. Sometimes switches off. (+ extract of circuit diagram)
• No video signal content on raster. 88 on display. No sound of EHT voltage generation. Lower part of raster darker than top. (+ extract of circuit diagram)
• No picture when switching on. After about 15 minutes the picture appears slowly, but contrast is poor (and hardly adjustable). Various supplied voltages are present. (picture attached)
• Black and white picture with no sound at power up. After adjusting colour and sound on front panel, quick flash and program memory is lost. (extract of circuit diagram attached)
• No raster for 5 mins. (+ extract of circuit diagram)
• No HV. (with circuit diagram extract)
• Tripping. (part of circuit diagram displayed)
• Teletext problem with photo-CD.
• Only the memory of the channel numbers is lost. (with circuit diagram extract) (SIERRA - 63KE6722 information)
• Knotted lines and verticals on the picture on the left in ext. position. (picture attached)
• Intermittent HT shutdown. (part of circuit diagram displayed)
• Identification of teletext decoder through microprocessor.
• No horizontal synchronisation. Picture rolls. (part of circuit diagram displayed)
• Wavy picture. (+ extract of circuit diagram) (63KE6722 tips)
• TV chatters at times. Tube noise on screen. (with circuit diagram extract)
• It takes the picture long time to appear and when it does, there is poor contrast. Sound OK. (part of circuit diagram displayed)
• Occasionally the channel has been erased from the memory, completely at random and in the space of a few weeks. Channel resetting has no problems at all. (picture attached)
• Does not switch to standby. Cycles on/off. (picture attached)
• Switches to standby. at start-up. (with circuit diagram extract)
• No line drive. (+ extract of circuit diagram)
• Sound and picture pulsate, appliance cuts out for a minute then works normally. Breakdown especially when cold. Pulsing every two seconds.
• Dark picture. Brightness, contrast and G2 at max. (+ extract of circuit diagram)
• No picture when cold. When warmed up, dotted lines appear and vertical deflection is reduced at the bottom. TV works OK after a few mins.
• White screen with flyback lines. Sometimes screen becomes black when switching off and then on with mains switch. Sound available. (+ extract of circuit diagram)
• Low brightness. Low contrast. when cold. (extract of circuit diagram attached)
• Contrast and brightness cannot be adjusted after a while, picture becomes darker. (63KE6722 tips)
• Picture vibrates vertically.
• When in standby switch off TV using RC, appliance continues to hiccup.
• Venetian blind effect. (extract of circuit diagram attached)
• Picture flickers (darkens 3 times per second approx).
• No channel storing. intermittently. (picture attached)
• Fuse shatters. BUT11 is S/C. (with circuit diagram extract)
• Starts up, switches off and starts up again spontaneously or memory loss or sound howling.
• No picture. Thin horizontal bars on the whole of the screen. the pot is adjusted slightly the picture appears but green pulses occur every second. (with circuit diagram extract)
• Vertical waving of lines for approx 2 mins. (picture attached)
• Sawtooth vertical lines. (with circuit diagram extract)
• White screen. Audio OK . (with circuit diagram extract)
• Ragged verticals at switch on; OK after 15 mins. (extract of circuit diagram attached)
• Channels drift, especially channel 44. Tuner OK. (with circuit diagram extract)
• U743 tuner replacement.
• Horizontal foldover.
• Low contrast. (part of circuit diagram displayed)
• No start-up. Standby LED flashes . (part of circuit diagram displayed) (63KE6722 SIERRA repair tip)
• Noise in picture, horizontal lines. Whistle sound in standby.
• The microprocessor is blocked. No programme indicator (with circuit diagram extract)
• No start-up. LED is red .
• Difficult to switch on. Does not stay in standby. (picture attached)
• Vertical picture shift towards left side. (with circuit diagram extract)
• Frizzy lines from top to bottom of picture. (extract of circuit diagram attached)
• Plopping sound, no picture and sound trips. After a while fault disappears.
• No raster. on lower half screen. (with circuit diagram extract)
• Fuse for mains input voltage blown suddenly at switch on. (+ extract of circuit diagram)
• RC only functions after 10 minutes. Receiver and RC are OK. There is no small module in power supply. (part of circuit diagram displayed)
• No sound. No picture. Displays "88". 2 LEDs light up.
• Standby does not function, picture remains, sound mutes and standby LED comes on. (picture attached)
• Blue screen. Flyback lines. Knock sensitive.
• Poor sound when volume increased. At switch on numerical display lights up and channel change OK. 30 mins later everything returns to normal. (+ extract of circuit diagram)
• Erratic chroma with VCR particularly on special effects. (extract of circuit diagram attached)
• Green circle on screen with red border, purplish colour.
• Jagged verticals. (with circuit diagram extract)
• No E/W correction. (+ extract of circuit diagram)
• Right side of picture becomes narrower.
• No audio (intermittently). (+ extract of circuit diagram)
• CTV functions when switched on by the switch. If switched off by the RC, impossible to switch on again by RC or by switch. Once cold, it can be started again only by the switch.
• PSU functions but supplies low voltages (eg.90V for 140 etc.). Adjustment 3670 functions. (extract of circuit diagram attached) (63KE6722 tip from SIERRA)
• PSU collapses especially at start up. (+ extract of circuit diagram) (service info for SIERRA -63KE6722)
• PSU pulsates when cold for 1min then picture and sound return.
• Slight flyback line, black line.
• No tuning. only on certain channels.
• Blows line BU.
• No audio. via speakers. (service info for SIERRA -63KE6722)
• No preset levels. Nonsense in display. (63KE6722 tips)
• Picture turns from white to black (when cold). (extract of circuit diagram attached)
• Loud audio (intermittently). (+ extract of circuit diagram)
• Horizontal waves in picture. Picture improves after longer operation. (with circuit diagram extract)
• Power supply blows up.
• No channel and no colour when switching off then on with main switch after channel programming.
• Picture appears faintly in black and white. The bottom of the screen is white. (with circuit diagram extract)
• Memory switches from 11 to 01 when switching channels quickly.
• Picture missing at start up, then appears, but with distorted lines. (+ extract of circuit diagram)
• Appliance pulsates for 10 mins before starting up.
• Waves permanently on verticals with test picture or on picture. (with circuit diagram extract)
• Snow in picture when chassis is tapped.
• Height and width decreased with lower half darker. Display shows "88". Faint raster. (extract of circuit diagram attached)
• When switched on TV starts up correctly. When it goes into standby it switches off completely. When switched on again it starts up again for approx 3 secs then switches off completely. No light is lit. (63KE6722 SIERRA repair tip)
• In standby, green horizontal line in middle of screen pulsating. When channel is altered then line becomes brighter with a pulsation. (part of circuit diagram displayed)
• Switches off at random or white picture for a short time. (part of circuit diagram displayed)
• Green flashes in picture.
• Channel display keeps going to E. (picture attached) (63KE6722 SIERRA repair tip)
• No red. No blue. (picture attached)
• Picture crackling, mostly when cold.
• No picture, "E1", after changing fuse 1653 works a couple of hours. (extract of circuit diagram attached)
• Horizontal lines. (picture attached)
• BU trips on mains 220V, heats up on mains 110V. (extract of circuit diagram attached)
• After operating for a few secs, PSU cuts out. It is necessary to wait for a few mins to be able to switch on again. (part of circuit diagram displayed)
• Vertical collapse. (part of circuit diagram displayed)
• Tuning voltage slow to rise to its normal value (pin 11 of tuner).
• BUT11A and bridge diodes 6657 to 6660 blow after 15 days when selecting a function from standby.
• Page 811 appears spontaneously. (extract of circuit diagram attached)
• Slight ripple barely visible. (extract of circuit diagram attached)
• Reduced height and non linear. Scan at bottom half is missing. (part of circuit diagram displayed)
• Vertical ondulation of the picture. (extract of circuit diagram attached)
• No picture. No audio. intermittently. Horizontal line. in E-E (intermittently). (63KE6722 SIERRA repair tip)
• Blue picture. Flyback lines. (part of circuit diagram displayed)
• Frizzy line on picture. (extract of circuit diagram attached)
• Intermittent output from power supply low and pulsing.
• Blue screen with white horizontal lines after a few secs. At start up picture ok. Sound ok.
• Line tearing. (picture attached)
• Curling on the line.
• Intermittently cuts out then starts up again and flashes.
• Line output transistor fails repeatedly. (part of circuit diagram displayed)
• IC7260 changed type. (extract of circuit diagram attached)
• Poor picture. (with circuit diagram extract)
• 140V is 50V.
• Trips. at start-up.
• How to store user controls.
• 5V problem, point 42 processor 4.7V is insufficient. The processor does anything. 8.5V on the collector of 7727 is ok. (+ extract of circuit diagram)
• Cogging effect on picture. (+ extract of circuit diagram)
• PSU "clatters" when cold. (part of circuit diagram displayed)
• Low contrast and no reaction to contrast control. Sound mutes. When adjusting sound (RC or front panel) it returns when key is pressed. (part of circuit diagram displayed)
• Disable hotel mode. (63KE6722 tip from SIERRA)
• No picture. Sound hiccups and pops. After some time functions normal again.
• Goes dead after changing all mod parts. (extract of circuit diagram attached)
• PSU pulsates, sound is audible, words clipped. No brightness.
• White screen. Flyback lines. (part of circuit diagram displayed)
• Dark picture. when cold. (part of circuit diagram displayed)
• Black screen. Cracking from EHT. White points on screen. (with circuit diagram extract)
• Poor vertical linearity. (extract of circuit diagram attached)
• Power supply is destroyed when appliance is left in standby. (with circuit diagram extract)
• Extremely strong howl in sound. "E1" appears on display. (63KE6722 tips)
• Occasionally there are breaks in the luminance. (+ extract of circuit diagram)
• BUT11 blown when switched to standby. Switching on/off with mains switch is OK. (picture attached)
• Picture jitters. Picture shifted to the right.
• Picture appears slowly. after a few minutes (when cold).
• Tripping. intermittently. (part of circuit diagram displayed)
• No sound. Dark picture. F1 on display. (with circuit diagram extract)
• Intermittently flash. System LED flashes but TV does not stop completely.
• Problems with Fast TXT. Cannot find page 811 whereas in spite of this the page is broadcast. TXT header remains on subtitles. (picture attached)
• Channel 39 is unstable. (extract of circuit diagram attached)
• E/W fault. (+ extract of circuit diagram)
• Memory loss of some pre-programmed programmes.
• Strong chirping noise in line transformer. (with circuit diagram extract)
• No TXT. (with circuit diagram extract)
• Incorrect teletext letter at right hand side of each row.
• Reduced brightness and line ripple. (picture attached)
• Colour flickers. (part of circuit diagram displayed)
• Tearing or ripple on picture when turning TV on. Present also after warming up. (picture attached)
• T7665 (BUT11AF) and D6657-6660 and fuse 1652 (T1,6A) are defective.
• Vertical line distortion due to contrast excess. (picture attached)
• Picture disturbed by a wave visible along the human contours. (part of circuit diagram displayed)
• No picture. at start-up. OK after a while .
• No front controls and no RC. "88" on display. (extract of circuit diagram attached)
• Swirling lines across screen. Does not stop in AUTO SEARCH when channel found. (+ extract of circuit diagram)
• No channel display or standby LED. (+ extract of circuit diagram)
• Starts up correctly and switches off with squeaking then LED switches off.
• Height changes with temperature - picture becomes longer.
• White vertical line in middle of screen. (part of circuit diagram displayed)
• E/W problem. Image collapses in one point at the centre of the screen.
• No audio. after start-up.
• "88" on display at switch on. LED lights.
• Attempts to start but trips, pulsating rapidly in short intervals. (service info for SIERRA -63KE6722)
• No picture or sound at start up. OK after approx 15 mins. (picture attached)
• Picture and sound appears only after a long time. Raster OK.
• Screen flashes at start up or intermittently. Then either shuts down without standby or loses all channels or switches to PAL. (picture attached)
• Poor horizontal scanning, like "teeth " to left and right side of picture. (picture attached)
• No picture. Audio OK . (part of circuit diagram displayed)
• Switches off during program switch-over and when picture turns from bright to dark or vice versa. Clattering from line transformer.
• SOPS blows repeatedly. (+ extract of circuit diagram)
• Dark screen, normal sound when switched on. Picture appears after 2 to 3 mins.
• Fades out or very dim. intermittently. (+ extract of circuit diagram)
• Pulses on and off. Slowly stays on longer and longer till it finally comes on fully.
• Tuning drifts. (part of circuit diagram displayed)
• Black screen. Sound OK. Vertical line on centre of screen when switching off with mains switch.
• PSU not oscillating. (extract of circuit diagram attached)
• Line time base/video/high frequency fault. (extract of circuit diagram attached)
• Unstable varicap voltage. (part of circuit diagram displayed)
• Distorted audio.
• Does not switch to standby. (picture attached)
• Picture has shifted to the right. Colours drop out. Picture becomes blue or red. Picture position changes. (part of circuit diagram displayed)
• When switching on TV it moves frequency. Also sometimes previously memorised channel is missing.
• Switches off preceded by varying HT supply. (+ extract of circuit diagram) (63KE6722 tips)
• No video after heating up for 1 to 2 hours. (with circuit diagram extract)
• Screen split into 4 areas: 1. Black bar; 2. Compressed picture with horizontal white lines; 3. Good picture; 4. Black bar. (part of circuit diagram displayed)
• No audio. (+ extract of circuit diagram) (SIERRA - 63KE6722 information)
• No front panel function. (part of circuit diagram displayed)
• Picture takes time to appear at Power On and sound is very loud. No function keys. Erratic functions. No display.
• No display. Standby or RC does not function. Slightly snowy picture and no channels are received. Otherwise there is no function.
• Intermittently line transistor shorts. (part of circuit diagram displayed)
• When using the Philips teletext kit, there is no teletext.
• S shape picture.
• Line tearing. when cold. (part of circuit diagram displayed)
• Interference in picture when aerial is touched or when appliance is touched. (extract of circuit diagram attached)
• No brightness. intermittently.
• At high contrast, at bright picture sections, horizontal, fine lines. (extract of circuit diagram attached)
• Noise in audio. intermittently.
• Intermittently picture collapse. PSU switches off for a short time. (picture attached)
• No contrast. intermittently. (picture attached)
• Smoke from R3628 (6.8R). (+ extract of circuit diagram) (63KE6722 tip from SIERRA)
• No functions. "E" message in display.
• Vertical black lines in picture when in EXT1 mode. (part of circuit diagram displayed)
• No picture (intermittent/intermittently). Picture disappears and screen is white after appliance switches off for a moment.
• Intermittently picture is bright or blinking for a fraction of a second.
• Lines in picture. on the left. (extract of circuit diagram attached)
• Black lines in picture, E/W fault, rattling sound from high voltage area.
• Stuck in standby.
• Flashes cyan after warming up. (picture attached)
• No vertical synchronisation.
• Raster is bright white and approx 3/4 sized. No RC functions.
• No picture. OK after a while . (+ extract of circuit diagram)
• R3599 (47R) keeps failing after approx 1 hour. (+ extract of circuit diagram)
• Pincushion distortion. (with circuit diagram extract) (63KE6722 tips)
• In standby, LED goes off after 10mins and no longer possible to switch on TV. If standby is not used TV functions perfectly. (with circuit diagram extract)
• Dead. Slight noise from PSU. (extract of circuit diagram attached)
• The picture is too small (height/width) and East/West does not work correctly. (part of circuit diagram displayed)
• E/W distortion. Picture squashed vertically. Poor synchronization. (extract of circuit diagram attached)
• Vertical foldover at bottom. (extract of circuit diagram attached)
• Shuts down (after start-up). (part of circuit diagram displayed)
• TDA3566/N6 (IC7260). (with circuit diagram extract)
• No functions. (picture attached) (SIERRA - 63KE6722 information)
• Arcing between pin 7 of line transistor and ground.
• Picture flickers at high contrast. (part of circuit diagram displayed)
• Vertical roll.
• Edging becomes blurry when subtitles in picture.
• Picture is visible but there is a white veil over screen. Sound OK.
• PSU defective. BUT11 S/C, mains rectifiers and TEA1039 faulty. (picture attached)
• No picture, no sound. Display shows "F1". (extract of circuit diagram attached)
• Picture trembles, gets smaller/bigger.
• Green picture with horizontal lines. OK when warm. Whistle in standby. (with circuit diagram extract)
• Half of the frame is black. Tuning problems.
• Intermittent hiccups and switch off when cold.
• Station selector sometimes goes to a station higher than 50.
• Switches to standby (intermittently).
• Vertical lines. Switches off by itself. intermittently. (part of circuit diagram displayed)
• No blue. Poor colour. (+ extract of circuit diagram)
• Appliance remains in black and white on VCRs from Far East. (+ extract of circuit diagram)
• Line collapses to 2". Dull raster. (+ extract of circuit diagram)
• Display remains blocked on E and automatic search does not stop. (+ extract of circuit diagram)
• Patterning on all channels. Appears to go past station when tuning slightly. (SIERRA - 63KE6722 information)
• PSU pulsates.
• Memory loss of one or two arbitrary programmes. (with circuit diagram extract)
• All horizontal and vertical lines tear in a wavy manner. (extract of circuit diagram attached)
• New type stands. (service info for SIERRA -63KE6722)
• No picture. Lines in picture. intermittently. Audio OK .
• Switches to protection mode. after start-up. (part of circuit diagram displayed) (63KE6722 tip from SIERRA)
• Special settings do not remain in memory.
• No picture. Display lights up. (picture attached)
• Dotted lines (dashes) flying around on picture--ragged (with circuit diagram extract)
• Dead or very poor power regulation. (extract of circuit diagram attached)
• Shuts down. after a while.
• Weird noises on channels (like EHT flashovers). (with circuit diagram extract)
• Flickering text and apparent tuning drift. (extract of circuit diagram attached)
• Error codes. (picture attached)
• Lines at top of picture and picture image is bent. (+ extract of circuit diagram)
• Starts up after replacing defective PSU but white flashes on screen and system diode flashes. (extract of circuit diagram attached)
• No or intermittent picture. Knock sensitive. (part of circuit diagram displayed)
• Picture flashes and sound cuts out at same time as picture.
• PSU output voltage very high. (extract of circuit diagram attached)
• Back-up battery symptoms after replacing memory. (with circuit diagram extract)
• Switches off by itself. Very intermittent fault. May work again after several attempts at switching on.
• No red. When knocking on TV, screen becomes red and no picture. (with circuit diagram extract)
• No picture, contrast up volts on TDA3562 stuck at 1.5V approx. (part of circuit diagram displayed)
• Starts up with grainy and unsynchronised picture.
• Picture can't be centered, left part of picture shifts back. (with circuit diagram extract)
• Sawtooth around characters for 15 minutes then picture becomes normal. (extract of circuit diagram attached)
• The microprocessor is blocked.
• No start-up or no picture. Faltering sound.
• Intermittently chopper transistor fails. (extract of circuit diagram attached)
• Intermittently no start up with ON/OFF switch. No standby light or channel display. (extract of circuit diagram attached)
• Intermittent audio. No start-up. intermittently. (picture attached)
• Dead and makes a loud tripping noise.
• No channels. intermittently. (service info for SIERRA -63KE6722)
• Starts up at switch on but just as the picture begins to appear the appliance flashes on and off quite violently but irregularly.
• Thin horizontal lines on the light screen. No picture.
• Poor sound in Canal Plus during coded transmissions. Sound OK when in clear and on other channels. (extract of circuit diagram attached)
• No focus (when cold).
• No RC functions. Other functions OK . (picture attached)
• Picture jitters. intermittently. (service info for SIERRA -63KE6722)
• AV correction does not function. (extract of circuit diagram attached)
• BUT 11AF blows after a few secs destroying the protection fuse (1:6A). (+ extract of circuit diagram)
• Switches to protection mode (after a few seconds). (extract of circuit diagram attached)
• Horizontal tearing. Vertical line tearing. (picture attached)
• Picture drops out for short while (picture becomes white thereby).
• Picture becomes darker, then drops out. (part of circuit diagram displayed)
• Intermittently switches off briefly, especially when tapped.
• No picture. No HT sound. Display OK. (part of circuit diagram displayed)
• No picture via E1. Distorted and saturated picture.
• After 5 mins impossible to change channel from the RC or front panel. Occasionally display goes off.
• No horizontal deflection. (part of circuit diagram displayed)
• Driver transistor 7630 blown after a few secs. (+ extract of circuit diagram) (63KE6722 tips)
• 7619 heats up. (extract of circuit diagram attached)
• Blows fuse. at start-up.
• Red screen. Flyback lines. No luminance. 37V on collector T7407. (part of circuit diagram displayed)
• Knock sensitive. Interference in picture. (extract of circuit diagram attached)
• Picture stays in black and white. Contrast and brightness controls have no effect.
• No start-up (intermittently). (picture attached)
• Reduced vertical size. Vertical foldover. (with circuit diagram extract)
• Burn on board line time base C2611. (+ extract of circuit diagram)
• Tube arcing at switch on and switch off. (part of circuit diagram displayed)
• Picture tearing and loss of vertical sync. Tends to improve when hot.
• All settings are lost at start up via On/Off switch. (part of circuit diagram displayed)
• Waves in picture.
• No channel search. (with circuit diagram extract)
• Black screen with sound. If it is switched off and on again with mains switch, sometimes white screen with flyback lines. (part of circuit diagram displayed)
• TS7665 fails. (picture attached)
• Slight predominance of the green. The blacks are greenish. Some flyback lines are green. (63KE6722 tips)
• No picture or faint picture as A1 advanced.
• No picture. No sound. Display remains on E at start up. (+ extract of circuit diagram)
• Thin lines, like pencil lines over the picture.
• Does not switch to E-E via scart.
• Switches off intermittently. Switches to PAL at Power On.
• Switches to protection mode. No picture. Audio OK .
• Intermittent foldover if brightness is too high. (+ extract of circuit diagram)