59KE3712 / SIERRA [TV 63 (59) cm picture]

• No picture or faint picture as A1 advanced.
• BUT 11AF blows after a few secs destroying the protection fuse (1:6A). (+ extract of circuit diagram)
• Vertical waving of lines for approx 2 mins. (part of circuit diagram displayed)
• Sound OK at switch on. When volume increased sound becomes unstable and distorted then cuts off 1 min later.
• No start-up. LED is red .
• PSU defective. BUT11 S/C, mains rectifiers and TEA1039 faulty. (+ extract of circuit diagram)
• No synchronisation.
• After 5 mins impossible to change channel from the RC or front panel. Occasionally display goes off.
• No sound. No picture. Displays "88". 2 LEDs light up.
• Colour spots in flat square picture tubes.
• Switches to protection mode (after a few seconds). (+ extract of circuit diagram)
• Reduced brightness and line ripple. (part of circuit diagram displayed)
• Only the memory of the channel numbers is lost. (with circuit diagram extract)
• Audio cuts off and standby LED lights up when selecting standby from RC. Picture remains normal. (picture attached)
• Dark picture. Brightness, contrast and G2 at max. (extract of circuit diagram attached)
• Green, bright flyback line. (with circuit diagram extract)
• No red. When knocking on TV, screen becomes red and no picture. (extract of circuit diagram attached) (59KE3712 SIERRA repair tip)
• Horizontal lines. (with circuit diagram extract)
• Chopper transistor (BUT11AF) fails repeatedly. (extract of circuit diagram attached)
• Picture jitters.
• Irregular flashing when picture appears. Starts up normally at switch on.
• Horizontal waves in picture. Picture improves after longer operation. (with circuit diagram extract) (59KE3712 tips)
• Picture bends inwards. (extract of circuit diagram attached)
• Shuts down (after start-up). (with circuit diagram extract)
• BUT11AF failed. (part of circuit diagram displayed)
• TS7665 fails. (extract of circuit diagram attached)
• No blue. Poor colour. (part of circuit diagram displayed)
• No horizontal synchronisation. Picture rolls. (part of circuit diagram displayed)
• Blue picture (after warm-up).
• Switches off preceded by varying HT supply. (part of circuit diagram displayed)
• Cycles on/off (when cold).
• Back-up battery symptoms after replacing memory. (picture attached)
• No preset levels. Nonsense in display.
• No focus (when cold).
• 140V HT supply is low at 60-70V. (+ extract of circuit diagram)
• Waves in picture.
• The microprocessor is blocked. No programme indicator (extract of circuit diagram attached)
• No picture. on upper half screen. (with circuit diagram extract)
• Rippling jagged verticals. (part of circuit diagram displayed)
• Vertical black lines in picture when in EXT1 mode. (extract of circuit diagram attached)
• Picture flashes and sound cuts out at same time as picture.
• Horizontal pulling of picture with considerable change in brightness. (picture attached)
• PSU pulsates, sound is audible, words clipped. No brightness.
• Picture has shifted to the right. Colours drop out. Picture becomes blue or red. Picture position changes. (with circuit diagram extract)
• Vertical waves, frizzy lines. (+ extract of circuit diagram)
• Three small lines at centre of tube. At switch off discontinuous faint vertical bar, burnt screen. (with circuit diagram extract)
• Over mains panel. (picture attached) (59KE3712 tip from SIERRA)
• Loud audio (after start-up). Does not alter when ± volume button is pressed. (+ extract of circuit diagram)
• Memory loss. only on one channel.
• Switches off during program switch-over and when picture turns from bright to dark or vice versa. Clattering from line transformer.
• Head does not stop.
• No E/W correction. (part of circuit diagram displayed)
• Microprocessor screening plate. (with circuit diagram extract)
• Fuse shatters. BUT11 is S/C. (picture attached)
• BUT11 blown when switched to standby. Switching on/off with mains switch is OK. (picture attached)
• Dotted lines (dashes) flying around on picture--ragged (+ extract of circuit diagram) (59KE3712 tips)
• No vertical synchronisation.
• 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.
• Picture appears slowly. after a few minutes (when cold).
• Dark screen, normal sound when switched on. Picture appears after 2 to 3 mins.
• Strong chirping noise in line transformer. (with circuit diagram extract)
• TV picture remains when standby selected. Sound is muted and red standby LED comes on. (picture attached)
• Low contrast. (picture attached)
• Memory loss of one or two arbitrary programmes. (with circuit diagram extract)
• Microcomputers and screening plate.
• Corrugated verticals. (extract of circuit diagram attached)
• Dark picture. Audio OK . (with circuit diagram extract)
• Intermittently dead. (part of circuit diagram displayed)
• No picture via E1. Distorted and saturated picture.
• Trips for a few seconds before starting up: chassis of an overmain-primary power supply circuit.
• Picture and sound appears only after a long time. Raster OK.
• Plopping sound, no picture and sound trips. After a while fault disappears.
• Frizzy lines from top to bottom of picture. (with circuit diagram extract)
• No picture. intermittently. (picture attached)
• No raster for 5 mins. (extract of circuit diagram attached)
• Signals to BUT11 in PSU and the four 300V diodes are occasionally defective.
• Red screen. Flyback lines. No luminance. 37V on collector T7407. (part of circuit diagram displayed) (59KE3712 tip from SIERRA)
• Dark picture. after a while.
• +140V adjustment. (extract of circuit diagram attached)
• When in standby switch off TV using RC, appliance continues to hiccup.
• Vertical lines move slowly to and fro, especially when cold. (with circuit diagram extract) (SIERRA - 59KE3712 information)
• Low brightness and line ripple. (with circuit diagram extract)
• Height changes with temperature - picture becomes longer.
• Switches off by itself. intermittently. (with circuit diagram extract)
• Dark picture. when cold. (picture attached) (59KE3712 SIERRA repair tip)
• LED goes off after 10 mins in standby. TV will not start up again but does so when cold. (with circuit diagram extract)
• No picture, contrast up volts on TDA3562 stuck at 1.5V approx. (with circuit diagram extract) (59KE3712 tip from SIERRA)
• Starts up with a click when cold. Distorted picture during 1 min. Picture flickers. (with circuit diagram extract)
• It takes the picture long time to appear and when it does, there is poor contrast. Sound OK. (with circuit diagram extract)
• Vertical lines not linear. (extract of circuit diagram attached)
• After operating normally for a short time some channels disappear. Frequency slip.
• Fades out or very dim. intermittently. (picture attached)
• Memory switches from 11 to 01 when switching channels quickly.
• Special settings do not remain in memory.
• Intermittently switches off then comes back on after several attempts.
• Picture jumps 3 mins after start up. Occasionally it turns pink, white, blue or yellow. (extract of circuit diagram attached)
• Wavy verticals. (extract of circuit diagram attached)
• Tearing or waves in picture when connecting the TV. Error present even after warm up. (with circuit diagram extract)
• BU508A defective. (extract of circuit diagram attached)
• Error codes. (picture attached)
• Appliance hiccups (only with white screen during playback). (extract of circuit diagram attached)
• Appliance remains in black and white on VCRs from Far East. (with circuit diagram extract)
• Sawtooth picture especially when cold. (with circuit diagram extract)
• Intermittently flash. System LED flashes but TV does not stop completely.
• Appliance switches off intermittently with flashes. Sometimes channels switch over to PAL.
• No audio. (part of circuit diagram displayed)
• Picture crackling, mostly when cold.
• Dark picture (intermittently). Audio OK .
• R3599 (47R) keeps failing after approx 1 hour. (+ extract of circuit diagram)
• Defective vertical linearity. Shading at bottom of picture. (picture attached)
• SOPS blows repeatedly. (with circuit diagram extract)
• Jagged verticals. (part of circuit diagram displayed)
• No picture. at start-up. OK after a while .
• Arcing. after a few seconds.
• Power supply defective.
• Streaked picture at start-up.
• Horizontal raster lines over entire picture. (picture attached)
• Starts up after replacing defective PSU but white flashes on screen and system diode flashes. (with circuit diagram extract)
• Tripping. intermittently. (picture attached)
• Picture is too narrow. Vertical wavy lines. (with circuit diagram extract)
• Wavy picture. (extract of circuit diagram attached)
• PSU pulsates when cold for 1min then picture and sound return.
• No contrast. Poor colour. (picture attached)
• Poor RC sensitivity. (with circuit diagram extract) (59KE3712 tip from SIERRA)
• Slight ripple barely visible. (part of circuit diagram displayed)
• Repeatedly cuts out for a short time when cold. (+ extract of circuit diagram)
• PSU output voltage very high. (extract of circuit diagram attached)
• Values of resistors R3658 and R3659. (extract of circuit diagram attached)
• Vertical outline drift.
• Information for measuring with a constantly defective BU. (with circuit diagram extract) (59KE3712 tip from SIERRA)
• Picture turns from white to black (when cold). (with circuit diagram extract)
• No audio. after a while. Hum in audio. in standby. (picture attached)
• No channel and no colour when switching off then on with main switch after channel programming.
• Distorted picture. No synchronisation (when cold). (+ extract of circuit diagram)
• No picture. No audio. intermittently. Horizontal line. in E-E (intermittently).
• Switches to protection mode. after start-up. (extract of circuit diagram attached)
• No brightness. No contrast. (picture attached)
• BUT blows if appliance remains in standby. (with circuit diagram extract)
• No picture or sound at start up. OK after approx 15 mins. (extract of circuit diagram attached)
• How to store user controls. (59KE3712 tip from SIERRA)
• Blows fuse. at start-up. (59KE3712 tips)
• The picture is too small (height/width) and East/West does not work correctly. (extract of circuit diagram attached)
• Arcing between pin 7 of line transistor and ground.
• AV correction does not function. (extract of circuit diagram attached)
• Intermittent HT shutdown. (with circuit diagram extract)
• Stuck in standby.
• No channel storing. intermittently. (part of circuit diagram displayed)
• Tearing or ripple on picture when turning TV on. Present also after warming up. (with circuit diagram extract)
• Poor contrast, reduced width with ripples down picture. (extract of circuit diagram attached)
• Power supply blows up.
• Power supply is destroyed when appliance is left in standby. (with circuit diagram extract)
• Picture trembles, gets smaller/bigger.
• Channel 39 is unstable. (picture attached)
• Connection of a loop system to TV.
• Blank picture for up to 1/2 an hour. (+ extract of circuit diagram)
• Green circle on screen with red border, purplish colour.
• Intermittently no start up with ON/OFF switch. No standby light or channel display. (part of circuit diagram displayed)
• Does not switch to E-E via scart. (59KE3712 SIERRA repair tip)
• BUT11 and diode 1N5061 become S/C. (part of circuit diagram displayed) (SIERRA - 59KE3712 information)
• No raster, EHT and heaters ok. (+ extract of circuit diagram)
• Pulsating picture. (extract of circuit diagram attached)
• Picture trembles vertically when cold with some programs. OK after warming up.
• Appliance pulsates for 10 mins before starting up.
• 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)
• Searches for channels continuously. (+ extract of circuit diagram)
• E/W problem. Image collapses in one point at the centre of the screen.
• Blue screen. Flyback lines. Fault occurs intermittently. .
• At switch on channel no. displayed then goes into -E-. Impossible to change channels, OK in video.
• Loses sound from memory when TV switched off by the switch. (picture attached)
• Waves in picture (in verticals, therefore, horizontal fault). (picture attached) (59KE3712 tip from SIERRA)
• Display remains blocked on E and automatic search does not stop. (picture attached)
• No start-up. (picture attached)
• TDA3566/N6 (IC7260). (+ extract of circuit diagram)
• Reduced vertical size. Vertical foldover. (picture attached)
• Attempts to start but trips, pulsating rapidly in short intervals.
• Distorted audio.
• Intermittently trips and/or reverts to channel 1. (59KE3712 tip from SIERRA)
• No audio. after start-up.
• Intermittently picture collapse. PSU switches off for a short time. (+ extract of circuit diagram)
• Burn on board line time base C2611. (part of circuit diagram displayed)
• No start-up or no picture. Faltering sound.
• 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) (59KE3712 tip from SIERRA)
• PSU collapses especially at start up. (extract of circuit diagram attached)
• 140V is 50V.
• No picture. OK after a while . (part of circuit diagram displayed)
• No tuning. (picture attached)
• Picture jitters. intermittently. (59KE3712 tip from SIERRA)
• Picture is visible but there is a white veil over screen. Sound OK.
• No reception.
• Intermittently functions out of control and no channel memory.
• Blank raster. No sound. Channel display shows E.
• Intermittent audio. No start-up. intermittently. (extract of circuit diagram attached)
• All horizontal and vertical lines tear in a wavy manner. (extract of circuit diagram attached)
• Extremely strong howl in sound. "E1" appears on display.
• E/W distortion. Picture squashed vertically. Poor synchronization. (+ extract of circuit diagram)
• Does not switch to standby. Cycles on/off. (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.
• Colour flickers. (picture attached)
• No vertical deflection. (extract of circuit diagram attached)
• Switches to standby. (picture attached)
• E/W fault. (with circuit diagram extract)
• Replacing the TXT board.
• 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.
• No picture. Display lights up. (part of circuit diagram displayed)
• Power supply blown or does not operate; BUT11AF failure. (picture attached)
• Picture flickers at high contrast. (part of circuit diagram displayed)
• Excessive horizontal size. E/W fault. (59KE3712 SIERRA repair tip)
• No picture. Audio OK . (with circuit diagram extract) (59KE3712 tips)
• Blue picture. when changing channels.
• Slow to start up 20-30 mins, squealing from line stage. (part of circuit diagram displayed)
• BUT12 becomes hot and fails when switching to standby. (with circuit diagram extract)
• Whistling. after warm-up.
• Image is overcontrolled or not standing still.
• Difficult to switch on. Does not stay in standby. (with circuit diagram extract)
• Low contrast and no reaction to contrast control. Sound mutes. When adjusting sound (RC or front panel) it returns when key is pressed. (picture attached) (59KE3712 SIERRA repair tip)
• T7665 (BUT11AF) and D6657-6660 and fuse 1652 (T1,6A) are defective.
• Flashes cyan after warming up. (part of circuit diagram displayed) (59KE3712 SIERRA repair tip)
• No line drive. (picture attached)
• Intermittent foldover if brightness is too high. (with circuit diagram extract)
• Negative picture with black smear on sides of pictures.
• No video signal content on raster. 88 on display. No sound of EHT voltage generation. Lower part of raster darker than top. (picture attached)
• BUT11A and bridge diodes 6657 to 6660 blow after 15 days when selecting a function from standby.
• Front buttons not changing channels or occasionally volume will not change.
• No functions. (part of circuit diagram displayed)
• Frizzy line on picture. (with circuit diagram extract)
• Poor audio.
• At high contrast, at bright picture sections, horizontal, fine lines. (extract of circuit diagram attached)
• No sound. Faint picture caused by lightning. (+ extract of circuit diagram)
• Identification of teletext decoder through microprocessor.
• Fails occasionally. Display is then dark and after mains switch is switched off then on again, runs perfectly again.
• Faint noise at switch on. (with circuit diagram extract)
• Waves permanently on verticals with test picture or on picture. (part of circuit diagram displayed)
• Erratic chroma with VCR particularly on special effects. (+ extract of circuit diagram)
• Weird noises on channels (like EHT flashovers). (with circuit diagram extract)
• Line tearing. when cold. (+ extract of circuit diagram)
• Intermittently switches off and picture moves horizontally.
• Picture flickers (darkens 3 times per second approx).
• Oscillations in picture, horizontal stripes and oscillations. (extract of circuit diagram attached)
• White screen, no sound. No pretuned channel switchover. (part of circuit diagram displayed)
• White screen with flyback lines. Sometimes screen becomes black when switching off and then on with mains switch. Sound available. (extract of circuit diagram attached) (59KE3712 SIERRA repair tip)
• No sound in IF, except when pressing volume ± button. (picture attached)
• Initially no picture; low contrast picture after a few minutes. (extract of circuit diagram attached)
• Line output transistor fails repeatedly. (extract of circuit diagram attached)
• No video after heating up for 1 to 2 hours. (picture attached)
• New type stands.
• White stripe on left. (with circuit diagram extract)
• Dead. F1 on display. (with circuit diagram extract) (59KE3712 tips)
• Slow start-up. (picture attached)
• Memory loss of some pre-programmed programmes.
• No vertical deflection. Line in the middle of frame which does not reach edges.
• Trips. Functions OK after a few mins. When switched off, 3 colours visible (afterglow). OK when subsequently switched on (appliance is warm).
• No channels. intermittently.
• Starts up, switches off and starts up again spontaneously or memory loss or sound howling. (59KE3712 tip from SIERRA)
• PSU hiccups.
• Knock sensitive. Interference in picture. (picture attached) (59KE3712 tip from SIERRA)
• 09 on display. Rattling noise from speaker. (picture attached) (SIERRA - 59KE3712 information)
• No colour. (part of circuit diagram displayed) (59KE3712 SIERRA repair tip)
• Incorrect teletext letter at right hand side of each row.
• Randomly switches off and video mute.
• Horizontal foldover.
• No functions. Display flashes .
• In standby, green horizontal line in middle of screen pulsating. When channel is altered then line becomes brighter with a pulsation. (picture attached)
• No display. after a few seconds. No front panel function. No RC functions. (part of circuit diagram displayed)
• No HV. (picture attached)
• Patterning on all channels. Appears to go past station when tuning slightly.
• Green picture with horizontal lines. OK when warm. Whistle in standby. (picture attached)
• Wavy picture on vertical lines. (extract of circuit diagram attached)
• Switches off at random or white picture for a short time. (+ extract of circuit diagram)
• At switch on picture is missing. Contrast builds up slowly over about an hour. (+ extract of circuit diagram)
• Picture stays in black and white. Contrast and brightness controls have no effect.
• Knotted lines and verticals on the picture on the left in ext. position. (picture attached)
• Unstable picture in TXT. Noisy characters at bottom of screen when using TXT. (extract of circuit diagram attached)
• Hum on B/G standard.
• Blue screen with white horizontal lines after a few secs. At start up picture ok. Sound ok.
• Dead. after a few minutes. (picture attached) (59KE3712 SIERRA repair tip)
• Weak unstable vertical when cold. (extract of circuit diagram attached)
• No or intermittent picture. Knock sensitive. (extract of circuit diagram attached)
• 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)
• Swirling lines across screen. Does not stop in AUTO SEARCH when channel found. (+ extract of circuit diagram) (59KE3712 tips)
• Switches off by itself. Very intermittent fault. May work again after several attempts at switching on.
• Trips when adjusting contrast. (picture attached)
• No brightness. intermittently.
• No picture, "E1", after changing fuse 1653 works a couple of hours. (extract of circuit diagram attached)
• Later chassis, no picture when first switched on. (+ extract of circuit diagram) (SIERRA - 59KE3712 information)
• Horizontal tearing. Vertical line tearing. (part of circuit diagram displayed)
• Poor vertical linearity. (+ 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.
• Height and width decreased with lower half darker. Display shows "88". Faint raster. (part of circuit diagram displayed)
• Intercarrier rattle in the sound. (+ extract of circuit diagram)
• Screen is completely blue with white flyback lines when warm.
• S shape picture.
• Contrast and brightness cannot be adjusted after a while, picture becomes darker.
• No colour via tuner. Colour buttons do not work. Functions well in RGB via scart. (SIERRA - 59KE3712 information)
• 140V rail fails after 5 minutes. (extract of circuit diagram attached)
• In standby PSU fails and destroys BUT11. (with circuit diagram extract)
• Line time base/video/high frequency fault. (extract of circuit diagram attached)
• Flashes green for a few minutes when switched on. (part of circuit diagram displayed)
• Intermittently line transistor shorts. (part of circuit diagram displayed)
• Channel display keeps going to E. (+ extract of circuit diagram)
• No front panel function. No RC functions. after a few minutes.
• 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)
• Fuse for mains input voltage blown suddenly at switch on. (with circuit diagram extract)
• PSU functions but supplies low voltages (eg.90V for 140 etc.). Adjustment 3670 functions. (with circuit diagram extract)
• BU trips on mains 220V, heats up on mains 110V. (picture attached)
• Pincushion distortion. (picture attached)
• RC only functions after 10 minutes. Receiver and RC are OK. There is no small module in power supply. (part of circuit diagram displayed)
• 1mm curl in vertical lines. (with circuit diagram extract)
• No functions. "E" message in display.
• Crackling on picture. Thin black lines than increase in number when cold.
• 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. (extract of circuit diagram attached)
• Snowy screen. No RC or front controls. Standby LED and display switched off. Sound and picture ok when restarting TV. (picture attached)
• Starts up with grainy and unsynchronised picture. (59KE3712 tips)
• The microprocessor is blocked.
• Switches to standby. at start-up. (with circuit diagram extract)
• 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)
• Dead. (part of circuit diagram displayed)
• Fuse 1653 blown. (with circuit diagram extract)
• PSU output voltages very low.
• PSU pulsates.
• Loud audio (intermittently). (part of circuit diagram displayed)
• Noise in picture, horizontal lines. Whistle sound in standby.
• Slight flyback line, black line.
• Front panel changes up but not down. (59KE3712 tip from SIERRA)
• Line collapses to 2". Dull raster. (picture attached)
• Significant shifting of picture and black band on the left side of the screen. (part of circuit diagram displayed)
• Station selector sometimes goes to a station higher than 50.
• 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)
• Intermittently cuts out then starts up again and flashes.
• Blue picture (intermittently).
• Edging becomes blurry when subtitles in picture.
• BUT11 burnt. (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.
• No audio. via speakers.
• Dead or very poor power regulation. (part of circuit diagram displayed)
• When switching on TV it moves frequency. Also sometimes previously memorised channel is missing.
• Vertical lines are jittering, reacting on mains voltage.
• No colours in SECAM. (with circuit diagram extract)
• Page 811 appears spontaneously. (picture attached)
• Vertical lines show bleeding effect, especially after switch on. (part of circuit diagram displayed)
• Ragged verticals at switch on; OK after 15 mins. (+ extract of circuit diagram)
• No picture (intermittently). (extract of circuit diagram attached)
• Weak points in picture. (picture attached)
• Blue picture. Flyback lines. (extract of circuit diagram attached)
• Slight predominance of the green. The blacks are greenish. Some flyback lines are green.
• Intermittently, picture disappears and screen becomes black. Sound OK. (part of circuit diagram displayed)
• How to increase safety range. (part of circuit diagram displayed)
• Mains rectifier reservoir capacitor C2656 failed. (picture attached)
• Picture vibrates vertically.
• No sound at switch on. Picture gradually appears after about 2 to 3 mins. (extract of circuit diagram attached)
• 5cm missing in lower part of picture. (with circuit diagram extract)
• Black lines in picture, E/W fault, rattling sound from high voltage area.
• Driver transistor 7630 blown after a few secs. (extract of circuit diagram attached)
• Raster is bright white and approx 3/4 sized. No RC functions.
• Vertical collapse (intermittently). (picture attached) (59KE3712 tips)
• Volume varies. (part of circuit diagram displayed)
• Vertical lines serrated on all 5cm's. Sometimes switches off. (with circuit diagram extract)
• No picture, no sound. Display shows "F1". (+ extract of circuit diagram)
• Pulling at bottom of picture in PAUSE when a video with Foxtrot chassis is connected. (with circuit diagram extract)
• No display. Standby or RC does not function. Slightly snowy picture and no channels are received. Otherwise there is no function.
• Vertical picture shift towards left side. (with circuit diagram extract)
• No raster. Audio OK . (picture attached)
• Goes dead after changing all mod parts. (extract of circuit diagram attached)
• Tripping. (picture attached)
• When switching TV to standby and turning it off via mains switch, it takes time to start up again.
• Disable hotel mode.
• Picture can't be centered, left part of picture shifts back. (extract of circuit diagram attached)
• Intermittently picture is bright or blinking for a fraction of a second.
• The different BU types.
• At switch on screen is blurred and slightly green for a few seconds.
• No horizontal deflection. (picture attached) (59KE3712 SIERRA repair tip)
• Low supply, +65V instead of +140V. (with circuit diagram extract)
• No RC functions.
• Intermittent arcing noise with loss of adjustments or goes into PAL or cuts out without the standby light. (extract of circuit diagram attached)
• HT varies, then powers down. (part of circuit diagram displayed)
• Starts up jerkily after 2 mins. Start up is OK when appliance becomes hot after a few minutes.
• Picture has poor colours. Scart output ok, poor scart input. (extract of circuit diagram attached)
• No or intermittent start-up. (+ extract of circuit diagram)
• Picture appears slowly. (with circuit diagram extract)
• Memory loss only on channel numbers 1, 2, 3. All other functions are correct. (part of circuit diagram displayed)
• 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.
• Black screen. Cracking from EHT. White points on screen. (part of circuit diagram displayed)
• Flashing picture. (extract of circuit diagram attached)
• 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) (service info for SIERRA -59KE3712)
• No picture (intermittent/intermittently). Picture disappears and screen is white after appliance switches off for a moment. (59KE3712 SIERRA repair tip)
• Horizontal scanning in middle of screen (foldover) with blurred stripes. (extract of circuit diagram attached)
• Half of the frame is black. Tuning problems. (59KE3712 tips)
• Switches off intermittently. Switches to PAL at Power On.
• Line tearing. (with circuit diagram extract)
• Switching transistor TR7665 (BUT11AF) in the PSU is S/C. (part of circuit diagram displayed)
• Safety test after repair.
• Intermittent loss of power, picture going off for a split sec and display flickers.
• Poor width and poor EHT regulation. (extract of circuit diagram attached)
• Vertical line distortion due to contrast excess. (extract of circuit diagram attached)
• Value of resistor R3628 and type of transistor 7930.
• Vertical lines. Switches off by itself. intermittently. (+ extract of circuit diagram)
• Flashing picture. when cold. (+ extract of circuit diagram)
• Flickering text and apparent tuning drift. (+ extract of circuit diagram)
• Only 'E' on OSD.
• Various types of picture tubes CP90. (59KE3712 tips)
• Output voltage is reduced. (picture attached)
• No channel search. (extract of circuit diagram attached)
• Screen flashes at start up or intermittently. Then either shuts down without standby or loses all channels or switches to PAL. (picture attached)
• Picture ringing plus herringbone pattern and no teletext.
• Picture goes off occasionally or repeatedly flashes off and on. (picture attached) (59KE3712 tip from SIERRA)
• Venetian blind effect. (with circuit diagram extract)
• EHT flashovers. (+ extract of circuit diagram)
• Picture is poor in the beginning, first 2 minutes as if the picture tube is defective. (+ extract of circuit diagram)
• Weak contrast. (picture attached)
• Functions OK but blinking LED. Strange display. (part of circuit diagram displayed)
• When using the Philips teletext kit, there is no teletext.
• No RC functions. Other functions OK . (+ extract of circuit diagram)
• No picture. No HT sound. Display OK. (with circuit diagram extract)
• No start-up. Standby LED flashes . (part of circuit diagram displayed)
• Fuse 1652 blown at start up. (+ extract of circuit diagram)
• Thin lines, like pencil lines over the picture.
• No audio. when cold.
• Does not switch to standby. intermittently.
• Sawtooth vertical lines. (picture attached)
• Black screen. Audio OK . (part of circuit diagram displayed)
• PSU "clatters" when cold. (picture attached) (59KE3712 tips)
• No tuning. only on certain channels.
• Poor sound in Canal Plus during coded transmissions. Sound OK when in clear and on other channels. (with circuit diagram extract)
• Trips violently as picture appears.
• PSU oscillates. (extract of circuit diagram attached)
• Occasionally there are breaks in the luminance. (picture attached)
• Unstable varicap voltage. (extract of circuit diagram attached)
• No picture. at bottom. (part of circuit diagram displayed)
• Repeated failure of the supply. (+ extract of circuit diagram)
• PSU blown after implementation of modification.
• Intermittently switches off briefly, especially when tapped.
• Reduced height and non linear. Scan at bottom half is missing. (picture attached)
• No red. No blue. (extract of circuit diagram attached) (59KE3712 SIERRA repair tip)
• Dead and makes a loud tripping noise.
• Break up of picture (dashes on the picture). (with circuit diagram extract)
• Picture jitters. Picture shifted to the right.
• Attempts to start up for a second, display shows ''1'' then letter ''E'' and no start-up.
• Curling on the line.
• 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.
• No start up. F1 displayed. (+ extract of circuit diagram)
• 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)
• Vertical collapse. (part of circuit diagram displayed)
• No start up. No display or PSU clicks and display pumps. Hit by lightning. (+ extract of circuit diagram) (59KE3712 SIERRA repair tip)
• Black screen. Sound OK. Vertical line on centre of screen when switching off with mains switch.
• Brightness varies. (part of circuit diagram displayed)
• Intermittent output from power supply low and pulsing. (SIERRA - 59KE3712 information)
• Black screen with sound. If it is switched off and on again with mains switch, sometimes white screen with flyback lines. (extract of circuit diagram attached)
• Sawtooth around characters for 15 minutes then picture becomes normal. (+ extract of circuit diagram)
• Low contrast in picture, impossible to adjust contrast. No sound intermittently. (+ extract of circuit diagram)
• Intermittent hiccups and switch off when cold.
• Picture tearing and loss of vertical sync. Tends to improve when hot.
• Dead. No display. No RC functions. (+ extract of circuit diagram)
• Poor horizontal scanning, like "teeth " to left and right side of picture. (part of circuit diagram displayed) (SIERRA - 59KE3712 information)
• 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. (with circuit diagram extract) (59KE3712 tip from SIERRA)
• Whites very faded, very grey. Functions OK.
• Does not switch to standby. (part of circuit diagram displayed)
• Blows line BU.
• In EXT position a black vertical line appears on left side of picture. (+ extract of circuit diagram)
• Black screen. (picture attached)
• Switches to standby (intermittently).
• Irregular chirping sounds from the power supply, is not stable in stand-by.
• No button operation. (+ extract of circuit diagram)
• Trips. at start-up.
• No HV. Audio OK . (extract of circuit diagram attached)
• Blue screen. Flyback lines. Knock sensitive.
• Vertical roll. (59KE3712 tip from SIERRA)
• Low HV.
• Blurry picture. Noise in audio.
• Interference in picture when aerial is touched or when appliance is touched. (picture attached)
• Hiss in audio.
• Does not tune any station, scanning available but does not stop on any station cause signal is missing. (with circuit diagram extract)
• No picture, high pitch noise before failure. (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.
• Shuts down. after a while.
• No sound. Dark screen. Jerky noise in speaker when pressing volume.
• Ticking noise. at start-up (intermittently).
• No channel display or standby LED. (+ extract of circuit diagram)
• Fuse (1.6) in the power supply blows instantly.
• Right side of picture becomes narrower.
• Vertical ondulation of the picture. (with circuit diagram extract)
• Hiccups when brightness is high.
• Lines at top of picture and picture image is bent. (with circuit diagram extract)
• No TXT. (part of circuit diagram displayed)
• 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. (extract of circuit diagram attached)
• PSU not oscillating. (+ extract of circuit diagram)
• Picture missing at start up, then appears, but with distorted lines. (with circuit diagram extract)
• No raster. on lower half screen. (with circuit diagram extract)
• Picture appears faintly in black and white. The bottom of the screen is white. (extract of circuit diagram attached)
• Poor picture. (part of circuit diagram displayed)
• No start-up. Standby LED does not light. (+ extract of circuit diagram)
• White screen. Audio OK . (extract of circuit diagram attached)
• Frayed picture.
• Stripes in picture. Knock sensitive. (with circuit diagram extract) (service info for SIERRA -59KE3712)
• No front controls and no RC. "88" on display. (extract of circuit diagram attached) (service info for SIERRA -59KE3712)
• Supply voltages collapse under load.
• TV chatters at times. Tube noise on screen. (with circuit diagram extract)
• Switches to protection mode (intermittently). (with circuit diagram extract)
• No audio (intermittently). (with circuit diagram extract)
• 3 mins after start up, the picture turns blue with horizontal white lines then after everything returns to normal. (extract of circuit diagram attached)
• Short picture breaks (white picture).
• Appliance and LED switch off from standby. When warm, display darkens and channels go out of tune. (with circuit diagram extract)
• No picture. (with circuit diagram extract)
• Picture has flashing line across. (+ extract of circuit diagram)
• Pulsates and whistling, display lit but no picture. (extract of circuit diagram attached)
• Low brightness. Low contrast. when cold. (picture attached)
• Lines in picture. on the left. (extract of circuit diagram attached)
• At switch on makes flashes, short interruption when cold for 1 min then normal. (extract of circuit diagram attached)
• U743 tuner replacement.
• No picture. No sound. Display remains on E at start up. (+ extract of circuit diagram)
• Picture remains dark. Contrast, brightness and colour controls ok. (+ extract of circuit diagram)
• White vertical line in middle of screen. (picture attached)
• Erratic start-up.
• 72V instead of 140V on secondary. (with circuit diagram extract)
• Tube arcing at switch on and switch off. (extract of circuit diagram attached)
• No contrast control. No brightness control. (+ extract of circuit diagram)
• Pulses on and off. Slowly stays on longer and longer till it finally comes on fully.
• Snow in picture when chassis is tapped.
• Standby does not function, picture remains, sound mutes and standby LED comes on. (part of circuit diagram displayed)
• All settings are lost at start up via On/Off switch. (picture attached)
• No start-up (intermittently). (with circuit diagram extract)
• Dark picture. (extract of circuit diagram attached)
• No sound. Dark picture. F1 on display. (with circuit diagram extract)
• Cogging effect on picture. (extract of circuit diagram attached)
• Sawtooth on vertical lines and 'water drop' effect. Fault improves slightly when appliance is hot. (with circuit diagram extract)
• Picture disturbed by a wave visible along the human contours. (part of circuit diagram displayed)
• Black vertical lines in picture. (picture attached)
• No picture. Lines in picture. intermittently. Audio OK .
• 7619 heats up. (picture attached)
• Noise in audio. intermittently.
• Screen split into 4 areas: 1. Black bar; 2. Compressed picture with horizontal white lines; 3. Good picture; 4. Black bar. (extract of circuit diagram attached)
• Starts up correctly and switches off with squeaking then LED switches off.
• No picture. Sound hiccups and pops. After some time functions normal again. (service info for SIERRA -59KE3712)
• Smoke from R3628 (6.8R). (part of circuit diagram displayed)
• Picture rolls. (with circuit diagram extract)
• In standby, LED goes off after 10mins and no longer possible to switch on TV. If standby is not used TV functions perfectly. (picture attached)
• White screen. Flyback lines. (extract of circuit diagram attached)
• Tuning voltage slow to rise to its normal value (pin 11 of tuner).
• BU508 S/C. (+ extract of circuit diagram)
• Thin horizontal lines on the light screen. No picture. (SIERRA - 59KE3712 information)
• No contrast. intermittently. (extract of circuit diagram attached)
• Tuning drifts. (part of circuit diagram displayed)
• IC7260 changed type. (+ extract of circuit diagram)
• Green flashes in picture.
• R2665 O/C. (extract of circuit diagram attached)
• Teletext problem with photo-CD.
• No picture or sound. "E" in display. PB via AV ok.
• Picture drops out for short while (picture becomes white thereby).
• Channels drift, especially channel 44. Tuner OK. (picture attached) (service info for SIERRA -59KE3712)
• Spontaneously becomes intermittent, caused by interference in the power supply. The appliance gurgles. (picture attached)
• Intermittently chopper transistor fails. (extract of circuit diagram attached)
• No front panel function. (with circuit diagram extract) (service info for SIERRA -59KE3712)
• Vertical foldover at bottom. (+ 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. (part of circuit diagram displayed)
• Replacing control IC7840. (extract of circuit diagram attached)
• Dead. Slight noise from PSU. (+ extract of circuit diagram)
• Reduced horizontal size. (picture attached)
• Picture becomes darker, then drops out. (part of circuit diagram displayed)
• "88" on display at switch on. LED lights.
• Starts up at switch on but just as the picture begins to appear the appliance flashes on and off quite violently but irregularly.
• Problems with Fast TXT. Cannot find page 811 whereas in spite of this the page is broadcast. TXT header remains on subtitles. (extract of circuit diagram attached)
• Switches to protection mode. No picture. Audio OK .
• Occasionally the picture pulls. (+ extract of circuit diagram)