66K465 / SIERRA [TV 70-74 (66-70) cm picture]

• Horizontal shift. No colour. (+ extract of circuit diagram)
• Trapezoid shaped raster.
• No tuning on some channels.
• No picture, no raster. (+ extract of circuit diagram)
• No E/W correction or low/width striations on the right hand side. (with circuit diagram extract)
• Picture is missing, sound missing or poor.
• North-South fault. (part of circuit diagram displayed)
• Picture height is only 10cm. 10cm line from picture centre. (part of circuit diagram displayed)
• Picture is missing, raster poor or varies, sound ok.
• Picture fails
• No function, a gurgling sound may be present. (part of circuit diagram displayed)
• New high voltage tripler.
• Gulps occasionally.
• Channel 2 overload. (picture attached)
• Dark picture. Weak colour. (+ extract of circuit diagram)
• Line collapse, lack of width or small picture.
• No horizontal hold. (picture attached)
• The colour is faulty. (extract of circuit diagram attached)
• Tuning drifts.
• No function, a sluggish gurgling sound is present in the power supply. (+ extract of circuit diagram)
• Outer lines cannot be straightened. (+ extract of circuit diagram)
• Bowing at bottom of picture. (extract of circuit diagram attached)
• No north-south correction. (with circuit diagram extract)
• The appliance gurgles occasionally after extreme luminance variations and when starting up the appliance. (picture attached)
• No colour. (extract of circuit diagram attached)
• Fuse switches when changing channel and picture. (+ extract of circuit diagram) (66K465 tip from SIERRA)
• Thick white lines in the upper part of the picture. (+ extract of circuit diagram)
• Set comes on after a while.
• Either red, green or blue colour difference signal is missing.
• Grey scale drifts slightly.
• The picture is blurry and then disappears.
• Vertical foldover on top of screen. (+ extract of circuit diagram)
• Crackles, rattles and the volume control is blocked. (part of circuit diagram displayed)
• Vertical picture shifted to left.
• Low horizontal amplitude after protection disabled by O/C 6560. (with circuit diagram extract) (service info for SIERRA -66K465)
• Only pumps. (+ extract of circuit diagram) (SIERRA - 66K465 information)
• E/W error. Picture width is too small. Controls do not react.
• Intermittent pin cushion distortion.
• Blank raster.
• Flyback lines or top of picture is shaded.
• No picture.
• The power supply functions irregularly. (+ extract of circuit diagram)
• Pumps (E-W correction is defective). (+ extract of circuit diagram)
• The picture becomes crooked on the lower side.
• Severe AGC overload. (picture attached)
• Picture is too small./
• N/S correction is faulty, curves in the upper and lower parts of the picture. All regulators do not function. (extract of circuit diagram attached) (66K465 tip from SIERRA)
• No E-W. Reduced width. (part of circuit diagram displayed)
• Striations or thin flyback lines.
• Horizontal picture has shifted downwards.
• Incorrect or unstable picture size.
• K9/K11 band switch.
• Horizontals at top and bottom curve into the middle. (SIERRA - 66K465 information)
• Lines in top part of picture. (with circuit diagram extract)
• Horizontal tearing at bottom. (part of circuit diagram displayed)
• Insufficient saturation.
• Vertical collapse.
• PSU hiccups with HV and sound.
• PSU switches on (no pumping). No switch on with slow power up. (+ extract of circuit diagram)
• Cramp at bottom of picture. (+ extract of circuit diagram) (service info for SIERRA -66K465)
• Top few lines foldover. (picture attached)
• Purity problems. (66K465 SIERRA repair tip)
• Little or no vertical scan. (part of circuit diagram displayed)
• The luminance disappears. (part of circuit diagram displayed)
• Patterning on screen.
• Striations down left hand side of picture.
• No picture. Sound ok.
• Tripping only with tripler connected (No picture, no sound). (extract of circuit diagram attached)
• Flyback lines and picture cannot be made darker. (with circuit diagram extract)
• Picture gets darker; no colours (blue and red). (+ extract of circuit diagram)
• Is occasionally unfocused (fault in the video amplifier). (with circuit diagram extract)
• BU208 fails continuously.
• Red, green or blue picture.
• Width pulsates. (with circuit diagram extract) (66K465 tip from SIERRA)
• Occasionally a line appears on screen (skips).
• Bowed verticals.
• Dead.
• Brightness control does not function. (service info for SIERRA -66K465)
• No power and rail voltage 19V only.
• Channel selector V311 is no longer available, will be V317.
• Weak vertical synchronisation.
• Line choke S172 squeaks. At switch off lights up like a Christmas tree. (part of circuit diagram displayed)
• Picture shading from left to right.
• Low brightness.
• The power supply makes a high whistling noise, otherwise the appliance functions properly. (+ extract of circuit diagram)
• Sound fades after short while.
• Convergence changes.
• Squealing from PSU. (with circuit diagram extract)
• Safety test after repair.
• No function, a high voltage is present. (picture attached)
• Sometimes horizontal output stage (drive) fails.
• The picture's width varies and the convergence constantly jumps. (+ extract of circuit diagram)
• Hum in audio. (part of circuit diagram displayed) (66K465 tip from SIERRA)
• Noise in picture.
• Dead. 95V supply 15V.
• The upper part of the picture is not complete. (part of circuit diagram displayed)
• Switches on with 12, all channels are noisy.
• Trips. (part of circuit diagram displayed)
• Connection of a loop system to the TV.
• Picture tube problems.
• Curved sides, plus another possible line fault.
• No HV. (with circuit diagram extract)
• Weak horizontal synchronisation. (part of circuit diagram displayed)
• No vertical deflection. (66K465 tip from SIERRA)
• No start-up (intermittently). (extract of circuit diagram attached)
• PSU switches (from 162V).
• E-W fault. (+ extract of circuit diagram)
• Vertical lines on the left on blank raster/parasitic oscillation. (+ extract of circuit diagram) (66K465 SIERRA repair tip)
• Supply voltage is guzzled.
• The picture enlarges and decreases in size during operation. (part of circuit diagram displayed)
• Unstable frame control or frame jitter or frame synchronisation missing or lack of height.
• Various picture problems.
• Reduced horizontal size. (part of circuit diagram displayed)
• Intermittent North/south fault, in cold conditions ok.
• Vertical flybacks visible at the top edge of the TXT stations.
• Horizontal synchronisation does not lock. (+ extract of circuit diagram)
• Lines in upper picture section.
• Picture rolls in at the bottom or a line appears in top third of screen. (66K465 tips)
• Goes for about 1/2hr rapidly switches on/off. (part of circuit diagram displayed)
• Bowed horizontals.
• Retrace lines when channels change. (+ extract of circuit diagram)
• Afterglow fleck at switch off.
• No colour or very weak green. (+ extract of circuit diagram)
• Sometimes picture disappears. Wrong channel LEDs light up. (part of circuit diagram displayed)
• Lines in lower part of picture. (part of circuit diagram displayed)
• Fuse VL170 is defective. (extract of circuit diagram attached)
• No audio. No picture. (+ extract of circuit diagram)
• Intermittent. Gurgles or vertical lines are present. (picture attached)
• The colour is unstable in the background; after being adjusted, it changes completely after a short period. (with circuit diagram extract)
• HT low. (+ extract of circuit diagram)
• Width, E/W correction and the trapezoidal pot(s) do not function. (picture attached)
• Contrast control does not function or is unstable.
• Sometimes vertical line appears in picture.
• Blows mains fuse 1-2 hrs. (with circuit diagram extract)
• Picture is too bright, flyback lines, screen is darker on left side. (+ extract of circuit diagram)
• Occasionally sound is too low or fails.
• Top foldover and retrace lines. (picture attached)
• Line output transistor T 446 fails repeatedly.
• Jumps from channel 1 to 3.
• TXT lines are visible in the upper part of the picture. Approx 3cm away from the upper edge of the picture (+ extract of circuit diagram)
• IC TDA2571AQ (4822 209 80646) no longer available.
• Dark picture, weak colours. (part of circuit diagram displayed)
• Picture skips to the left. (with circuit diagram extract)
• There is a black line in the upper part of the picture, only part of the picture is visible. (part of circuit diagram displayed)
• Convergence fault. (picture attached)
• Repair method: PSU.
• Appliance pulsates (SIERRA - 66K465 information)
• No power supply. Protection circuit triggered. (+ extract of circuit diagram) (66K465 tips)
• Convergence pot R672 and R717 do not control enough. Red-green does not coincide. (extract of circuit diagram attached)
• Contrast and/or brightness do not function.
• Gulps at switch off.
• Bright flash on screen, no picture or sound. (picture attached)
• Poor adjustment of convergence at top and bottom. (+ extract of circuit diagram)
• The sound controls unevenly.
• Bu i netdel kortslutter (per.)
• No start-up.
• Sometimes the power supply breaks down after a short period. (with circuit diagram extract) (66K465 tips)
• One colour missing (dark picture).
• The red-green convergence is faulty. (part of circuit diagram displayed)
• Low vertical, 2" picture.
• Blue convergence, R667 (above horizontally) does not function. (extract of circuit diagram attached)
• Defective dynamic convergence.
• Blue convergence. (service info for SIERRA -66K465)
• Blown chopper transistor.
• No video and reduced width.
• Rolling, no contrast and over bright picture.
• Top and bottom horizontals curve into the middle plus colour fault.
• Two horizontal bands of white dots. (picture attached)
• The picture runs and pulls (distorted), strong signal. (with circuit diagram extract)
• Flyback lines in the picture. (66K465 tips)
• Poor convergence top 4"blacked out. (picture attached) (66K465 SIERRA repair tip)
• The appliance does not start. Gurgling noise in the sound and with high frequency. The appliance occasionally starts but has an unstable picture and then becomes intermittent again. (with circuit diagram extract)
• Picture grainy and sound noisy.
• Flyback lines in picture.
• Top of picture cramped. (with circuit diagram extract)
• No functions. (picture attached)