70KE6922 / SIERRA [TV]

• No tuning. (with circuit diagram extract)
• Attempts to start but trips, pulsating rapidly in short intervals.
• Picture jitters. Picture shifted to the right.
• 3 mins after start up, the picture turns blue with horizontal white lines then after everything returns to normal. (picture attached)
• Intermittent foldover if brightness is too high. (picture attached)
• Poor horizontal scanning, like "teeth " to left and right side of picture. (with circuit diagram extract)
• Blows line BU.
• Reduced height and non linear. Scan at bottom half is missing. (part of circuit diagram displayed) (70KE6922 tips)
• Tripping. (part of circuit diagram displayed)
• Intermittently switches off then comes back on after several attempts.
• No start-up. Standby LED does not light. (with circuit diagram extract)
• Intermittently picture is bright or blinking for a fraction of a second.
• At switch on picture is missing. Contrast builds up slowly over about an hour. (extract of circuit diagram attached)
• BU508 S/C. (extract of circuit diagram attached)
• The picture is too small (height/width) and East/West does not work correctly. (picture attached)
• Snowy screen. No RC or front controls. Standby LED and display switched off. Sound and picture ok when restarting TV. (with circuit diagram extract) (70KE6922 tips)
• Thin lines, like pencil lines over the picture.
• 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) (service info for SIERRA -70KE6922)
• BUT11 blown when switched to standby. Switching on/off with mains switch is OK. (picture attached)
• Low contrast in picture, impossible to adjust contrast. No sound intermittently. (+ extract of circuit diagram) (service info for SIERRA -70KE6922)
• No picture via E1. Distorted and saturated picture.
• 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. (part of circuit diagram displayed)
• Does not switch to standby. Cycles on/off. (with circuit diagram extract)
• Switches off by itself. intermittently. (with circuit diagram extract)
• Picture jumps 3 mins after start up. Occasionally it turns pink, white, blue or yellow. (picture attached)
• Fails occasionally. Display is then dark and after mains switch is switched off then on again, runs perfectly again.
• The microprocessor is blocked. No programme indicator (with circuit diagram extract)
• No front panel function. No RC functions. after a few minutes.
• No start-up. LED is red .
• 140V rail fails after 5 minutes. (extract of circuit diagram attached)
• Tube arcing at switch on and switch off. (part of circuit diagram displayed)
• Intermittently, picture disappears and screen becomes black. Sound OK. (part of circuit diagram displayed)
• Right side of picture becomes narrower.
• Pulses on and off. Slowly stays on longer and longer till it finally comes on fully.
• Power supply blown or does not operate; BUT11AF failure. (+ extract of circuit diagram) (70KE6922 tip from SIERRA)
• Microcomputers and screening plate.
• Picture bends inwards. (+ extract of circuit diagram)
• Safety test after repair.
• Vertical outline drift. (service info for SIERRA -70KE6922)
• Vertical lines move slowly to and fro, especially when cold. (with circuit diagram extract)
• No horizontal deflection. (extract of circuit diagram attached)
• Switches to protection mode (intermittently). (picture attached)
• Switches to standby. (picture attached)
• Curling on the line. (70KE6922 SIERRA repair tip)
• Page 811 appears spontaneously. (extract of circuit diagram attached)
• Switches to protection mode. after start-up. (with circuit diagram extract)
• Vertical line distortion due to contrast excess. (with circuit diagram extract)
• Intermittent hiccups and switch off when cold.
• Image is overcontrolled or not standing still.
• No colour via tuner. Colour buttons do not work. Functions well in RGB via scart.
• Waves in picture (in verticals, therefore, horizontal fault). (part of circuit diagram displayed)
• Line tearing. when cold. (extract of circuit diagram attached)
• Memory loss of one or two arbitrary programmes. (+ extract of circuit diagram)
• Trips when adjusting contrast. (with circuit diagram extract) (SIERRA - 70KE6922 information)
• 140V is 50V.
• Slight ripple barely visible. (with circuit diagram extract)
• No picture. on upper half screen. (extract of circuit diagram attached)
• Poor RC sensitivity. (+ extract of circuit diagram)
• No picture. Sound hiccups and pops. After some time functions normal again.
• At switch on channel no. displayed then goes into -E-. Impossible to change channels, OK in video.
• No picture, contrast up volts on TDA3562 stuck at 1.5V approx. (part of circuit diagram displayed)
• Vertical lines not linear. (with circuit diagram extract)
• 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.
• Streaked picture at start-up.
• White screen, no sound. No pretuned channel switchover. (+ extract of circuit diagram)
• BUT11 burnt. (extract of circuit diagram attached) (service info for SIERRA -70KE6922)
• Various types of picture tubes CP90.
• Picture can't be centered, left part of picture shifts back. (extract of circuit diagram attached)
• Picture takes time to appear at Power On and sound is very loud. No function keys. Erratic functions. No display.
• Picture missing at start up, then appears, but with distorted lines. (picture attached)
• Front buttons not changing channels or occasionally volume will not change.
• Poor vertical linearity. (picture attached)
• No colours in SECAM. (with circuit diagram extract) (service info for SIERRA -70KE6922)
• Does not switch to standby. (+ extract of circuit diagram)
• Colour spots in flat square picture tubes.
• No picture. (+ extract of circuit diagram) (70KE6922 SIERRA repair tip)
• No contrast. intermittently. (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. (with circuit diagram extract)
• Snow in picture when chassis is tapped.
• Noise in picture, horizontal lines. Whistle sound in standby.
• 09 on display. Rattling noise from speaker. (picture attached)
• Loud audio (intermittently). (extract of circuit diagram attached)
• No channels. intermittently.
• Intermittently line transistor shorts. (part of circuit diagram displayed)
• In standby PSU fails and destroys BUT11. (+ extract of circuit diagram)
• No start-up. (+ extract of circuit diagram)
• Trips violently as picture appears.
• Flashing picture. (+ extract of circuit diagram)
• Picture trembles vertically when cold with some programs. OK after warming up.
• Picture turns from white to black (when cold). (extract of circuit diagram attached) (service info for SIERRA -70KE6922)
• Hiccups when brightness is high.
• Corrugated verticals. (extract of circuit diagram attached) (70KE6922 SIERRA repair tip)
• Picture becomes darker, then drops out. (part of circuit diagram displayed)
• Sawtooth vertical lines. (extract of circuit diagram attached)
• Blue picture. when changing channels.
• Noise in audio. intermittently.
• Smoke from R3628 (6.8R). (with circuit diagram extract) (70KE6922 tips)
• Poor contrast, reduced width with ripples down picture. (with circuit diagram extract) (70KE6922 SIERRA repair tip)
• Pulsating picture. (part of circuit diagram displayed)
• PSU blown after implementation of modification.
• Picture tearing and loss of vertical sync. Tends to improve when hot.
• Channel 39 is unstable. (extract of circuit diagram attached) (70KE6922 SIERRA repair tip)
• Ticking noise. at start-up (intermittently).
• Switches to protection mode. No picture. Audio OK . (70KE6922 tips)
• No start up. No display or PSU clicks and display pumps. Hit by lightning. (picture attached)
• 140V HT supply is low at 60-70V. (+ extract of circuit diagram)
• Starts up correctly and switches off with squeaking then LED switches off.
• No picture or faint picture as A1 advanced.
• Horizontal pulling of picture with considerable change in brightness. (part of circuit diagram displayed)
• RC only functions after 10 minutes. Receiver and RC are OK. There is no small module in power supply. (extract of circuit diagram attached)
• Rippling jagged verticals. (extract of circuit diagram attached)
• Excessive horizontal size. E/W fault.
• Wavy verticals. (extract of circuit diagram attached)
• No channel search. (part of circuit diagram displayed) (70KE6922 tip from SIERRA)
• BUT11 and diode 1N5061 become S/C. (+ extract of circuit diagram)
• Low supply, +65V instead of +140V. (picture attached)
• Switches off during program switch-over and when picture turns from bright to dark or vice versa. Clattering from line transformer.
• Dead or very poor power regulation. (with circuit diagram extract)
• Picture jitters.
• In EXT position a black vertical line appears on left side of picture. (with circuit diagram extract)
• Tuning drifts. (part of circuit diagram displayed) (70KE6922 tips)
• No audio. after a while. Hum in audio. in standby. (with circuit diagram extract)
• 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.
• Interference in picture when aerial is touched or when appliance is touched. (+ extract of circuit diagram)
• Blue screen. Flyback lines. Knock sensitive.
• AV correction does not function. (picture attached)
• No start-up or no picture. Faltering sound. (70KE6922 SIERRA repair tip)
• Burn on board line time base C2611. (with circuit diagram extract)
• T7665 (BUT11AF) and D6657-6660 and fuse 1652 (T1,6A) are defective.
• Horizontal lines. (part of circuit diagram displayed)
• Picture has poor colours. Scart output ok, poor scart input. (extract of circuit diagram attached)
• No picture. at bottom. (with circuit diagram extract)
• Does not switch to E-E via scart.
• Three small lines at centre of tube. At switch off discontinuous faint vertical bar, burnt screen. (extract of circuit diagram attached)
• Loses sound from memory when TV switched off by the switch. (with circuit diagram extract)
• Fuse (1.6) in the power supply blows instantly.
• Dead. (+ extract of circuit diagram)
• SOPS blows repeatedly. (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. (extract of circuit diagram attached) (70KE6922 SIERRA repair tip)
• Intermittently functions out of control and no channel memory.
• No red. No blue. (picture attached)
• No picture, no sound. Display shows "F1". (+ extract of circuit diagram)
• Appliance switches off intermittently with flashes. Sometimes channels switch over to PAL.
• Picture flickers at high contrast. (with circuit diagram extract)
• Sound OK at switch on. When volume increased sound becomes unstable and distorted then cuts off 1 min later. (70KE6922 tip from SIERRA)
• Slow to start up 20-30 mins, squealing from line stage. (+ extract of circuit diagram)
• Frizzy line on picture. (picture attached)
• Flashes cyan after warming up. (part of circuit diagram displayed)
• No sound. Dark picture. F1 on display. (with circuit diagram extract)
• Oscillations in picture, horizontal stripes and oscillations. (picture attached)
• Extremely strong howl in sound. "E1" appears on display.
• Problems with Fast TXT. Cannot find page 811 whereas in spite of this the page is broadcast. TXT header remains on subtitles. (with circuit diagram extract)
• Over mains panel. (with circuit diagram extract) (70KE6922 SIERRA repair tip)
• Dead. F1 on display. (+ extract of circuit diagram)
• Black vertical lines in picture. (with circuit diagram extract)
• Weak points in picture. (part of circuit diagram displayed)
• No picture or sound. "E" in display. PB via AV ok.
• Picture ringing plus herringbone pattern and no teletext.
• Knotted lines and verticals on the picture on the left in ext. position. (with circuit diagram extract) (service info for SIERRA -70KE6922)
• Error codes. (part of circuit diagram displayed)
• Blows fuse. at start-up. (SIERRA - 70KE6922 information)
• Memory switches from 11 to 01 when switching channels quickly.
• Poor picture. (picture attached)
• Intermittently trips and/or reverts to channel 1.
• Sawtooth picture especially when cold. (part of circuit diagram displayed)
• Occasionally there are breaks in the luminance. (+ extract of circuit diagram)
• Slight predominance of the green. The blacks are greenish. Some flyback lines are green.
• 72V instead of 140V on secondary. (part of circuit diagram displayed)
• Erratic start-up.
• Mains rectifier reservoir capacitor C2656 failed. (part of circuit diagram displayed)
• Initially no picture; low contrast picture after a few minutes. (part of circuit diagram displayed)
• Dark picture. after a while.
• Tripping. intermittently. (extract of circuit diagram attached)
• Arcing between pin 7 of line transistor and ground.
• Value of resistor R3628 and type of transistor 7930.
• Low contrast. (with circuit diagram extract)
• Switches off intermittently. Switches to PAL at Power On. (70KE6922 tip from SIERRA)
• The microprocessor is blocked.
• Pulsates and whistling, display lit but no picture. (part of circuit diagram displayed)
• Stuck in standby.
• Vertical ondulation of the picture. (picture attached) (70KE6922 tip from SIERRA)
• Standby does not function, picture remains, sound mutes and standby LED comes on. (picture attached)
• Dead and makes a loud tripping noise.
• Half of the frame is black. Tuning problems.
• Picture stays in black and white. Contrast and brightness controls have no effect.
• No audio. when cold.
• Fades out or very dim. intermittently. (part of circuit diagram displayed)
• White screen, no sound. An "E" appears on screen. When connecting TV, no. 1 appears, but instantly switches to E. (service info for SIERRA -70KE6922)
• 5cm missing in lower part of picture. (+ extract of circuit diagram)
• PSU not oscillating. (extract of circuit diagram attached)
• Vertical lines. Switches off by itself. intermittently. (extract of circuit diagram attached)
• Arcing. after a few seconds.
• Appliance hiccups (only with white screen during playback). (picture attached)
• TDA3566/N6 (IC7260). (with circuit diagram extract)
• 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)
• Blue screen. Flyback lines. Fault occurs intermittently. .
• Picture appears faintly in black and white. The bottom of the screen is white. (with circuit diagram extract)
• BU trips on mains 220V, heats up on mains 110V. (with circuit diagram extract)
• Special settings do not remain in memory.
• After operating normally for a short time some channels disappear. Frequency slip.
• No horizontal synchronisation. Picture rolls. (extract of circuit diagram attached)
• Horizontal raster lines over entire picture. (picture attached)
• PSU oscillates. (with circuit diagram extract) (70KE6922 tip from SIERRA)
• White stripe on left. (extract of circuit diagram attached)
• Tuning voltage slow to rise to its normal value (pin 11 of tuner).
• Switching transistor TR7665 (BUT11AF) in the PSU is S/C. (with circuit diagram extract)
• No picture, "E1", after changing fuse 1653 works a couple of hours. (extract of circuit diagram attached)
• Station selector sometimes goes to a station higher than 50.
• Appliance remains in black and white on VCRs from Far East. (part of circuit diagram displayed)
• Horizontal scanning in middle of screen (foldover) with blurred stripes. (+ extract of circuit diagram)
• Black screen. Audio OK . (+ extract of circuit diagram)
• Channel display keeps going to E. (extract of circuit diagram attached)
• Green circle on screen with red border, purplish colour. (SIERRA - 70KE6922 information)
• No picture. Lines in picture. intermittently. Audio OK .
• Sawtooth on vertical lines and 'water drop' effect. Fault improves slightly when appliance is hot. (part of circuit diagram displayed)
• No contrast. Poor colour. (with circuit diagram extract)
• Tearing or waves in picture when connecting the TV. Error present even after warm up. (with circuit diagram extract)
• Power supply is destroyed when appliance is left in standby. (+ extract of circuit diagram) (SIERRA - 70KE6922 information)
• Black screen. Sound OK. Vertical line on centre of screen when switching off with mains switch.
• Appliance pulsates for 10 mins before starting up.
• Lines in picture. on the left. (+ extract of circuit diagram)
• Picture drops out for short while (picture becomes white thereby).
• Reduced vertical size. Vertical foldover. (picture attached) (SIERRA - 70KE6922 information)
• No preset levels. Nonsense in display.
• Slight flyback line, black line.
• Display remains blocked on E and automatic search does not stop. (picture attached)
• Audio cuts off and standby LED lights up when selecting standby from RC. Picture remains normal. (extract of circuit diagram attached)
• Memory loss of some pre-programmed programmes.
• No video signal content on raster. 88 on display. No sound of EHT voltage generation. Lower part of raster darker than top. (part of circuit diagram displayed)
• Information for measuring with a constantly defective BU. (picture attached) (70KE6922 tips)
• Picture trembles, gets smaller/bigger.
• No display. after a few seconds. No front panel function. No RC functions. (+ extract of circuit diagram)
• Difficult to switch on. Does not stay in standby. (picture attached)
• Picture flickers (darkens 3 times per second approx). (70KE6922 tips)
• White screen with flyback lines. Sometimes screen becomes black when switching off and then on with mains switch. Sound available. (part of circuit diagram displayed)
• Frayed picture.
• No sound. Dark screen. Jerky noise in speaker when pressing volume.
• Screen flashes at start up or intermittently. Then either shuts down without standby or loses all channels or switches to PAL. (part of circuit diagram displayed)
• Microprocessor screening plate. (with circuit diagram extract)
• Blue screen with white horizontal lines after a few secs. At start up picture ok. Sound ok.
• Trips for a few seconds before starting up: chassis of an overmain-primary power supply circuit.
• When using the Philips teletext kit, there is no teletext.
• No TXT. (picture attached)
• Only 'E' on OSD.
• Picture vibrates vertically.
• Randomly switches off and video mute.
• No audio. via speakers. (70KE6922 tip from SIERRA)
• Vertical roll.
• 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) (SIERRA - 70KE6922 information)
• No raster. on lower half screen. (part of circuit diagram displayed)
• No vertical synchronisation.
• No channel storing. intermittently. (part of circuit diagram displayed)
• Intermittently no start up with ON/OFF switch. No standby light or channel display. (part of circuit diagram displayed)
• Weak unstable vertical when cold. (extract of circuit diagram attached)
• Cycles on/off (when cold).
• No button operation. (+ extract of circuit diagram)
• Weak contrast. (part of circuit diagram displayed) (70KE6922 tips)
• No audio. (part of circuit diagram displayed)
• Power supply defective.
• Line transformer (BU508AF) blown repeatedly at start up. When it blows a noise is heard like arcing in line transformer. (extract of circuit diagram attached)
• Plopping sound, no picture and sound trips. After a while fault disappears. (SIERRA - 70KE6922 information)
• PSU output voltage very high. (picture attached)
• Edging becomes blurry when subtitles in picture.
• Intermittent loss of power, picture going off for a split sec and display flickers.
• Memory loss only on channel numbers 1, 2, 3. All other functions are correct. (part of circuit diagram displayed)
• No raster. Audio OK . (+ extract of circuit diagram)
• When in standby switch off TV using RC, appliance continues to hiccup.
• Significant shifting of picture and black band on the left side of the screen. (with circuit diagram extract)
• Intermittently chopper transistor fails. (extract of circuit diagram attached) (SIERRA - 70KE6922 information)
• Picture is visible but there is a white veil over screen. Sound OK.
• No picture (intermittent/intermittently). Picture disappears and screen is white after appliance switches off for a moment.
• Trips. at start-up.
• Functions OK but blinking LED. Strange display. (+ extract of circuit diagram) (70KE6922 tip from SIERRA)
• Vertical collapse (intermittently). (part of circuit diagram displayed)
• PSU functions but supplies low voltages (eg.90V for 140 etc.). Adjustment 3670 functions. (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 attached)
• Switches off at random or white picture for a short time. (with circuit diagram extract)
• IC7260 changed type. (picture attached)
• Switches to standby. at start-up. (part of circuit diagram displayed)
• Frizzy lines from top to bottom of picture. (part of circuit diagram displayed)
• Ragged verticals at switch on; OK after 15 mins. (extract of circuit diagram attached)
• No focus (when cold).
• EHT flashovers. (part of circuit diagram displayed)
• White screen. Audio OK . (with circuit diagram extract)
• All settings are lost at start up via On/Off switch. (with circuit diagram extract)
• "88" on display at switch on. LED lights. (70KE6922 tips)
• Jagged verticals. (with circuit diagram extract)
• Starts up with a click when cold. Distorted picture during 1 min. Picture flickers. (part of circuit diagram displayed)
• PSU defective. BUT11 S/C, mains rectifiers and TEA1039 faulty. (extract of circuit diagram attached)
• Black screen. (picture attached)
• Blue picture. Flyback lines. (extract of circuit diagram attached) (70KE6922 SIERRA repair tip)
• Teletext problem with photo-CD.
• It takes the picture long time to appear and when it does, there is poor contrast. Sound OK. (picture attached)
• 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.
• Intercarrier rattle in the sound. (picture attached)
• Whites very faded, very grey. Functions OK.
• Intermittently switches off and picture moves horizontally.
• Appliance and LED switch off from standby. When warm, display darkens and channels go out of tune. (picture attached)
• Picture flashes and sound cuts out at same time as picture.
• Output voltage is reduced. (with circuit diagram extract)
• Line output transistor fails repeatedly. (with circuit diagram extract)
• Picture appears slowly. after a few minutes (when cold).
• U743 tuner replacement.
• New type stands.
• Blurry picture. Noise in audio.
• Picture rolls. (picture attached)
• No audio. after start-up.
• No audio (intermittently). (with circuit diagram extract)
• Vertical lines show bleeding effect, especially after switch on. (picture attached)
• No HV. (extract of circuit diagram attached)
• Starts up at switch on but just as the picture begins to appear the appliance flashes on and off quite violently but irregularly.
• Fuse for mains input voltage blown suddenly at switch on. (extract of circuit diagram attached)
• Picture goes off occasionally or repeatedly flashes off and on. (picture attached)
• Black screen with sound. If it is switched off and on again with mains switch, sometimes white screen with flyback lines. (picture attached)
• Fuse 1652 blown at start up. (+ extract of circuit diagram)
• Vertical black lines in picture when in EXT1 mode. (+ extract of circuit diagram)
• Low brightness and line ripple. (extract of circuit diagram attached)
• Patterning on all channels. Appears to go past station when tuning slightly.
• No front controls and no RC. "88" on display. (picture attached)
• Short picture breaks (white picture).
• At switch on screen is blurred and slightly green for a few seconds.
• No channel and no colour when switching off then on with main switch after channel programming.
• No picture or sound at start up. OK after approx 15 mins. (picture attached)
• Starts up jerkily after 2 mins. Start up is OK when appliance becomes hot after a few minutes.
• Irregular chirping sounds from the power supply, is not stable in stand-by.
• Flickering text and apparent tuning drift. (picture attached)
• Occasionally the picture pulls. (extract of circuit diagram attached) (service info for SIERRA -70KE6922)
• No picture, high pitch noise before failure. (+ extract of circuit diagram)
• 1mm curl in vertical lines. (with circuit diagram extract)
• The different BU types.
• Picture has flashing line across. (extract of circuit diagram attached)
• BUT 11AF blows after a few secs destroying the protection fuse (1:6A). (picture attached) (70KE6922 tips)
• Slow start-up. (+ extract of circuit diagram)
• Crackling on picture. Thin black lines than increase in number when cold.
• Intermittently dead. (picture attached)
• Dead. No display. No RC functions. (+ extract of circuit diagram)
• Starts up, switches off and starts up again spontaneously or memory loss or sound howling.
• S shape picture.
• No reception.
• Starts up, picture and sound ok. If put into standby, standby LED switches off after 5 secs, then impossible to switch on again. (with circuit diagram extract)
• No RC functions. Other functions OK . (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).
• Fuse 1653 blown. (extract of circuit diagram attached)
• Pulling at bottom of picture in PAUSE when a video with Foxtrot chassis is connected. (picture attached)
• Back-up battery symptoms after replacing memory. (+ extract of circuit diagram)
• Height and width decreased with lower half darker. Display shows "88". Faint raster. (+ extract of circuit diagram)
• No picture. at start-up. OK after a while .
• 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. (picture attached) (70KE6922 tip from SIERRA)
• Dead. Slight noise from PSU. (extract of circuit diagram attached)
• No blue. Poor colour. (with circuit diagram extract)
• No synchronisation. (70KE6922 tips)
• Dark picture. (extract of circuit diagram attached)
• PSU collapses especially at start up. (+ extract of circuit diagram)
• Low HV.
• BUT11AF failed. (picture attached)
• PSU hiccups.
• Pincushion distortion. (part of circuit diagram displayed)
• Picture appears slowly. (picture attached)
• Picture remains dark. Contrast, brightness and colour controls ok. (extract of circuit diagram attached)
• Cogging effect on picture. (extract of circuit diagram attached)
• Green flashes in picture.
• Reduced horizontal size. (part of circuit diagram displayed)
• PSU output voltages very low. (SIERRA - 70KE6922 information)
• Supply voltages collapse under load.
• 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. (picture attached) (SIERRA - 70KE6922 information)
• Picture has shifted to the right. Colours drop out. Picture becomes blue or red. Picture position changes. (picture attached)
• Shuts down (after start-up). (extract of circuit diagram attached)
• Head does not stop. (SIERRA - 70KE6922 information)
• No picture. Audio OK . (with circuit diagram extract)
• No E/W correction. (extract of circuit diagram attached)
• How to store user controls. (70KE6922 tip from SIERRA)
• E/W distortion. Picture squashed vertically. Poor synchronization. (with circuit diagram extract)
• At high contrast, at bright picture sections, horizontal, fine lines. (with circuit diagram extract)
• No red. When knocking on TV, screen becomes red and no picture. (extract of circuit diagram attached) (service info for SIERRA -70KE6922)
• Values of resistors R3658 and R3659. (+ extract of circuit diagram)
• All horizontal and vertical lines tear in a wavy manner. (extract of circuit diagram attached)
• Contrast and brightness cannot be adjusted after a while, picture becomes darker.
• Reduced brightness and line ripple. (extract of circuit diagram attached)
• Picture jitters. intermittently.
• No picture. intermittently. (part of circuit diagram displayed)
• Wavy picture on vertical lines. (with circuit diagram extract)
• Stripes in picture. Knock sensitive. (picture attached)
• Intermittent arcing noise with loss of adjustments or goes into PAL or cuts out without the standby light. (part of circuit diagram displayed)
• Volume varies. (+ extract of circuit diagram)
• In standby, LED goes off after 10mins and no longer possible to switch on TV. If standby is not used TV functions perfectly. (part of circuit diagram displayed) (70KE6922 tips)
• No functions. Display flashes .
• Unstable varicap voltage. (with circuit diagram extract)
• BUT11A and bridge diodes 6657 to 6660 blow after 15 days when selecting a function from standby.
• No sound. No picture. Displays "88". 2 LEDs light up.
• 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. (with circuit diagram extract)
• Horizontal tearing. Vertical line tearing. (part of circuit diagram displayed)
• Break up of picture (dashes on the picture). (+ extract of circuit diagram)
• No picture. OK after a while . (part of circuit diagram displayed)
• Line time base/video/high frequency fault. (with circuit diagram extract)
• Poor width and poor EHT regulation. (with circuit diagram extract)
• White screen. Flyback lines. (extract of circuit diagram attached)
• At switch on makes flashes, short interruption when cold for 1 min then normal. (picture attached)
• No RC functions.
• No display. Standby or RC does not function. Slightly snowy picture and no channels are received. Otherwise there is no function.
• No picture. No HT sound. Display OK. (with circuit diagram extract)
• E/W fault. (extract of circuit diagram attached)
• Vertical foldover at bottom. (part of circuit diagram displayed)
• Negative picture with black smear on sides of pictures.
• Whistling. after warm-up.
• No channel display or standby LED. (with circuit diagram extract)
• Vertical waving of lines for approx 2 mins. (with circuit diagram extract)
• 7619 heats up. (+ extract of circuit diagram)
• Distorted audio. (70KE6922 tips)
• No vertical deflection. Line in the middle of frame which does not reach edges.
• Screen is completely blue with white flyback lines when warm. (70KE6922 tip from SIERRA)
• No or intermittent start-up. (part of circuit diagram displayed)
• Green, bright flyback line. (part of circuit diagram displayed)
• No colour. (part of circuit diagram displayed)
• How to increase safety range. (with circuit diagram extract)
• Intermittently switches off briefly, especially when tapped.
• Intermittent output from power supply low and pulsing.
• No picture. Display lights up. (picture attached)
• Only the memory of the channel numbers is lost. (part of circuit diagram displayed) (service info for SIERRA -70KE6922)
• Horizontal waves in picture. Picture improves after longer operation. (extract of circuit diagram attached)
• Line collapses to 2". Dull raster. (part of circuit diagram displayed)
• BUT12 becomes hot and fails when switching to standby. (with circuit diagram extract)
• Line tearing. (picture attached)
• Knock sensitive. Interference in picture. (extract of circuit diagram attached) (SIERRA - 70KE6922 information)
• No front panel function. (picture attached)
• Black screen. Cracking from EHT. White points on screen. (extract of circuit diagram attached)
• No HV. Audio OK . (+ extract of circuit diagram)
• Dark screen, normal sound when switched on. Picture appears after 2 to 3 mins.
• Picture disturbed by a wave visible along the human contours. (picture attached) (SIERRA - 70KE6922 information)
• Searches for channels continuously. (+ extract of circuit diagram)
• Dark picture. Audio OK . (+ extract of circuit diagram)
• Blank raster. No sound. Channel display shows E.
• Attempts to start up for a second, display shows ''1'' then letter ''E'' and no start-up.
• Low brightness. Low contrast. when cold. (part of circuit diagram displayed)
• Distorted picture. No synchronisation (when cold). (with circuit diagram extract)
• Spontaneously becomes intermittent, caused by interference in the power supply. The appliance gurgles. (+ extract of circuit diagram)
• TV picture remains when standby selected. Sound is muted and red standby LED comes on. (+ extract of circuit diagram)
• Flashes green for a few minutes when switched on. (+ extract of circuit diagram)
• PSU pulsates. (70KE6922 tip from SIERRA)
• Switches to protection mode (after a few seconds). (extract of circuit diagram attached) (service info for SIERRA -70KE6922)
• Weird noises on channels (like EHT flashovers). (with circuit diagram extract)
• Front panel changes up but not down.
• PSU pulsates when cold for 1min then picture and sound return.
• Picture is poor in the beginning, first 2 minutes as if the picture tube is defective. (picture attached)
• Green picture with horizontal lines. OK when warm. Whistle in standby. (+ extract of circuit diagram)
• Canal Plus in black and white. Colour ok on other channels. Brightness ok. Colour problems after a certain amount of time. (picture attached)
• HT varies, then powers down. (picture attached)
• White vertical line in middle of screen. (picture attached)
• Waves permanently on verticals with test picture or on picture. (part of circuit diagram displayed)
• Picture is too narrow. Vertical wavy lines. (+ extract of circuit diagram)
• Vertical waves, frizzy lines. (+ extract of circuit diagram)
• BUT blows if appliance remains in standby. (part of circuit diagram displayed)
• No brightness. intermittently.
• When switching TV to standby and turning it off via mains switch, it takes time to start up again.
• Identification of teletext decoder through microprocessor.
• Hum on B/G standard.
• Intermittent audio. No start-up. intermittently. (picture attached)
• Goes dead after changing all mod parts. (with circuit diagram extract)
• Intermittent HT shutdown. (+ extract of circuit diagram)
• No raster, EHT and heaters ok. (with circuit diagram extract)
• Fuse shatters. BUT11 is S/C. (picture attached)
• Poor sound when volume increased. At switch on numerical display lights up and channel change OK. 30 mins later everything returns to normal. (with circuit diagram extract)
• Strong chirping noise in line transformer. (with circuit diagram extract)
• Faint noise at switch on. (+ extract of circuit diagram)
• +140V adjustment. (part of circuit diagram displayed)
• Height changes with temperature - picture becomes longer.
• Picture crackling, mostly when cold.
• Blank picture for up to 1/2 an hour. (extract of circuit diagram attached)
• Irregular flashing when picture appears. Starts up normally at switch on.
• Disable hotel mode.
• Switches off by itself. Very intermittent fault. May work again after several attempts at switching on.
• Starts up after replacing defective PSU but white flashes on screen and system diode flashes. (extract of circuit diagram attached)
• 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.
• Dead. after a few minutes. (part of circuit diagram displayed)
• Sound and picture pulsate, appliance cuts out for a minute then works normally. Breakdown especially when cold. Pulsing every two seconds.
• No contrast control. No brightness control. (+ extract of circuit diagram)
• Connection of a loop system to TV.
• Chopper transistor (BUT11AF) fails repeatedly. (+ extract of circuit diagram)
• Repeated failure of the supply. (picture attached)
• No start up. F1 displayed. (part of circuit diagram displayed)
• Defective vertical linearity. Shading at bottom of picture. (extract of circuit diagram attached)
• Incorrect teletext letter at right hand side of each row.
• Brightness varies. (with circuit diagram extract)
• Vertical lines serrated on all 5cm's. Sometimes switches off. (extract of circuit diagram attached)
• Horizontal foldover.
• Starts up. Red LED lights up for a few secs then dead. Cycle may be reproduced some 10 secs after.
• No picture. No audio. intermittently. Horizontal line. in E-E (intermittently).
• LED goes off after 10 mins in standby. TV will not start up again but does so when cold. (extract of circuit diagram attached)
• Signals to BUT11 in PSU and the four 300V diodes are occasionally defective.
• Channels drift, especially channel 44. Tuner OK. (+ extract of circuit diagram)
• Power supply blows up.
• Dark picture (intermittently). Audio OK .
• Dotted lines (dashes) flying around on picture--ragged (part of circuit diagram displayed) (service info for SIERRA -70KE6922)
• Later chassis, no picture when first switched on. (extract of circuit diagram attached)
• Poor sound in Canal Plus during coded transmissions. Sound OK when in clear and on other channels. (part of circuit diagram displayed)
• After 5 mins impossible to change channel from the RC or front panel. Occasionally display goes off.
• Venetian blind effect. (part of circuit diagram displayed)
• No picture (intermittently). (extract of circuit diagram attached) (service info for SIERRA -70KE6922)
• Colour flickers. (part of circuit diagram displayed)
• No line drive. (+ extract of circuit diagram)
• Vertical collapse. (with circuit diagram extract)
• Vertical picture shift towards left side. (+ extract of circuit diagram) (SIERRA - 70KE6922 information)
• No tuning. only on certain channels.
• Does not switch to standby. intermittently.
• R2665 O/C. (with circuit diagram extract)
• No start-up (intermittently). (with circuit diagram extract)
• Memory loss. only on one channel.
• No raster for 5 mins. (with circuit diagram extract)
• Intermittently picture collapse. PSU switches off for a short time. (extract of circuit diagram attached)
• Intermittently flash. System LED flashes but TV does not stop completely.
• No functions. "E" message in display.
• Hiss in audio.
• Thin horizontal lines on the light screen. No picture.
• No or intermittent picture. Knock sensitive. (+ extract of circuit diagram)
• Raster is bright white and approx 3/4 sized. No RC functions.
• Poor audio.
• Does not tune any station, scanning available but does not stop on any station cause signal is missing. (part of circuit diagram displayed)
• Swirling lines across screen. Does not stop in AUTO SEARCH when channel found. (extract of circuit diagram attached)
• Red screen. Flyback lines. No luminance. 37V on collector T7407. (part of circuit diagram displayed)
• Erratic chroma with VCR particularly on special effects. (picture attached)
• PSU pulsates, sound is audible, words clipped. No brightness.
• Vertical lines are jittering, reacting on mains voltage.
• Shuts down. after a while.
• Replacing the TXT board.
• Unstable picture in TXT. Noisy characters at bottom of screen when using TXT. (+ extract of circuit diagram)
• No brightness. No contrast. (extract of circuit diagram attached)
• Dark picture. when cold. (picture attached)
• Sawtooth around characters for 15 minutes then picture becomes normal. (+ extract of circuit diagram)
• Switches off preceded by varying HT supply. (extract of circuit diagram attached)
• Flashing picture. when cold. (with circuit diagram extract)
• R3599 (47R) keeps failing after approx 1 hour. (part of circuit diagram displayed)
• Blue picture (after warm-up).
• No functions. (+ extract of circuit diagram)
• Black lines in picture, E/W fault, rattling sound from high voltage area.
• Wavy picture. (part of circuit diagram displayed)
• Driver transistor 7630 blown after a few secs. (picture attached)
• Blue picture (intermittently).
• Replacing control IC7840. (picture attached)
• Waves in picture.
• PSU "clatters" when cold. (with circuit diagram extract)
• No sound in IF, except when pressing volume ± button. (picture attached)
• No sound. Faint picture caused by lightning. (picture attached)
• Tearing or ripple on picture when turning TV on. Present also after warming up. (extract of circuit diagram attached)
• TV chatters at times. Tube noise on screen. (extract of circuit diagram attached)
• No start-up. Standby LED flashes . (+ extract of circuit diagram)
• Lines at top of picture and picture image is bent. (with circuit diagram extract)
• Dark picture. Brightness, contrast and G2 at max. (extract of circuit diagram attached)
• TS7665 fails. (with circuit diagram extract)
• Intermittently cuts out then starts up again and flashes.
• Starts up with grainy and unsynchronised picture.
• Switches to standby (intermittently).
• No sound at switch on. Picture gradually appears after about 2 to 3 mins. (with circuit diagram extract)
• E/W problem. Image collapses in one point at the centre of the screen. (70KE6922 SIERRA repair tip)
• No picture. No sound. Display remains on E at start up. (picture attached)
• Repeatedly cuts out for a short time when cold. (with circuit diagram extract) (70KE6922 SIERRA repair tip)
• 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 attached)
• When switching on TV it moves frequency. Also sometimes previously memorised channel is missing.
• Picture and sound appears only after a long time. Raster OK.
• BU508A defective. (picture attached)
• No video after heating up for 1 to 2 hours. (extract of circuit diagram attached)
• No vertical deflection. (part of circuit diagram displayed) (70KE6922 tip from SIERRA)
• Loud audio (after start-up). Does not alter when ± volume button is pressed. (with circuit diagram extract)