SA56K102 / SIERRA [TV 56 (52) cm picture]

• Top few lines foldover. (picture attached)
• Noise in picture.
• Brightness control does not function.
• Crackles, rattles and the volume control is blocked. (with circuit diagram extract)
• No colour or very weak green. (+ extract of circuit diagram)
• The picture becomes crooked on the lower side.
• Width pulsates. (part of circuit diagram displayed) (service info for SIERRA -SA56K102)
• Top and bottom horizontals curve into the middle plus colour fault.
• Picture is too small./
• Low horizontal amplitude after protection disabled by O/C 6560. (with circuit diagram extract)
• The power supply makes a high whistling noise, otherwise the appliance functions properly. (extract of circuit diagram attached)
• Appliance pulsates
• E/W error. Picture width is too small. Controls do not react.
• Gulps at switch off.
• The picture runs and pulls (distorted), strong signal. (extract of circuit diagram attached) (SIERRA - SA56K102 information)
• Picture is missing, raster poor or varies, sound ok.
• The power supply functions irregularly. (part of circuit diagram displayed)
• Contrast control does not function or is unstable.
• Bowing at bottom of picture. (extract of circuit diagram attached)
• Flyback lines or top of picture is shaded.
• The picture's width varies and the convergence constantly jumps. (part of circuit diagram displayed)
• Intermittent North/south fault, in cold conditions ok.
• Picture tube problems.
• Vertical picture shifted to left.
• Intermittent pin cushion distortion.
• Blows mains fuse 1-2 hrs. (picture attached)
• No vertical deflection.
• No video and reduced width. (SA56K102 tips)
• Picture skips to the left. (picture attached)
• Line output transistor T 446 fails repeatedly.
• The red-green convergence is faulty. (part of circuit diagram displayed)
• Defective dynamic convergence.
• IC TDA2571AQ (4822 209 80646) no longer available.
• No north-south correction. (picture attached)
• Striations down left hand side of picture.
• Thick white lines in the upper part of the picture. (picture attached)
• Little or no vertical scan. (extract of circuit diagram attached)
• Sometimes vertical line appears in picture.
• No picture. Sound ok.
• Weak vertical synchronisation.
• Bowed verticals.
• The sound controls unevenly.
• 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. (part of circuit diagram displayed)
• Line choke S172 squeaks. At switch off lights up like a Christmas tree. (extract of circuit diagram attached)
• Bowed horizontals.
• New high voltage tripler.
• Poor convergence top 4"blacked out. (extract of circuit diagram attached)
• No function, a sluggish gurgling sound is present in the power supply. (with circuit diagram extract)
• Rolling, no contrast and over bright picture.
• Tripping only with tripler connected (No picture, no sound). (+ extract of circuit diagram)
• Vertical flybacks visible at the top edge of the TXT stations.
• Convergence fault. (+ extract of circuit diagram)
• Picture fails
• No E/W correction or low/width striations on the right hand side. (picture attached)
• No picture.
• Grey scale drifts slightly.
• Picture grainy and sound noisy.
• Incorrect or unstable picture size.
• Tuning drifts.
• Bright flash on screen, no picture or sound. (extract of circuit diagram attached)
• PSU hiccups with HV and sound. (SA56K102 tips)
• Two horizontal bands of white dots. (+ extract of circuit diagram)
• No picture, no raster. (picture attached)
• Supply voltage is guzzled.
• Picture is missing, sound missing or poor.
• Weak horizontal synchronisation. (part of circuit diagram displayed)
• Flyback lines and picture cannot be made darker. (part of circuit diagram displayed)
• The colour is faulty. (part of circuit diagram displayed)
• The appliance gurgles occasionally after extreme luminance variations and when starting up the appliance. (extract of circuit diagram attached)
• Channel selector V311 is no longer available, will be V317.
• North-South fault. (part of circuit diagram displayed)
• Set comes on after a while.
• Horizontal shift. No colour. (with circuit diagram extract)
• Striations or thin flyback lines.
• Horizontal tearing at bottom. (with circuit diagram extract)
• Lines in top part of picture. (part of circuit diagram displayed)
• BU208 fails continuously.
• Connection of a loop system to the TV.
• Insufficient saturation.
• Convergence pot R672 and R717 do not control enough. Red-green does not coincide. (picture attached)
• Various picture problems.
• Fuse switches when changing channel and picture. (picture attached)
• Blue convergence, R667 (above horizontally) does not function. (+ extract of circuit diagram)
• Fuse VL170 is defective. (+ extract of circuit diagram) (SA56K102 tips)
• The colour is unstable in the background; after being adjusted, it changes completely after a short period. (+ extract of circuit diagram)
• Sometimes horizontal output stage (drive) fails.
• Occasionally sound is too low or fails.
• Contrast and/or brightness do not function.
• Lines in lower part of picture. (picture attached)
• No HV. (part of circuit diagram displayed)
• Picture gets darker; no colours (blue and red). (part of circuit diagram displayed)
• Picture height is only 10cm. 10cm line from picture centre. (extract of circuit diagram attached)
• Patterning on screen.
• Horizontals at top and bottom curve into the middle.
• Vertical collapse.
• Occasionally a line appears on screen (skips).
• Flyback lines in picture.
• One colour missing (dark picture).
• No function, a high voltage is present. (+ extract of circuit diagram)
• Dead. 95V supply 15V.
• Afterglow fleck at switch off.
• Vertical lines on the left on blank raster/parasitic oscillation. (part of circuit diagram displayed)
• Red, green or blue picture.
• Top of picture cramped. (part of circuit diagram displayed)
• Line collapse, lack of width or small picture.
• Switches on with 12, all channels are noisy.
• Squealing from PSU. (+ extract of circuit diagram)
• Blank raster.
• Either red, green or blue colour difference signal is missing.
• Severe AGC overload. (extract of circuit diagram attached)
• Picture shading from left to right.
• Flyback lines in the picture.
• Low vertical, 2" picture. (service info for SIERRA -SA56K102)
• The picture is blurry and then disappears.
• Lines in upper picture section.
• No power and rail voltage 19V only.
• Dark picture. Weak colour. (+ extract of circuit diagram)
• No power supply. Protection circuit triggered. (with circuit diagram extract)
• Curved sides, plus another possible line fault. (service info for SIERRA -SA56K102)
• No colour. (picture attached)
• Picture rolls in at the bottom or a line appears in top third of screen.
• 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)
• Sometimes picture disappears. Wrong channel LEDs light up. (extract of circuit diagram attached) (SA56K102 SIERRA repair tip)
• There is a black line in the upper part of the picture, only part of the picture is visible. (part of circuit diagram displayed)
• No start-up. (SA56K102 SIERRA repair tip)
• Picture is too bright, flyback lines, screen is darker on left side. (part of circuit diagram displayed)
• Sound fades after short while.
• No start-up (intermittently). (part of circuit diagram displayed)
• Retrace lines when channels change. (extract of circuit diagram attached)
• No tuning on some channels.
• No audio. No picture. (+ extract of circuit diagram)
• Low brightness.
• Unstable frame control or frame jitter or frame synchronisation missing or lack of height.
• Repair method: PSU.
• No functions. (extract of circuit diagram attached)
• The picture enlarges and decreases in size during operation. (part of circuit diagram displayed) (SA56K102 SIERRA repair tip)
• PSU switches on (no pumping). No switch on with slow power up. (part of circuit diagram displayed)
• Bu i netdel kortslutter (per.)
• Dead.
• No E-W. Reduced width. (with circuit diagram extract)
• Dark picture, weak colours. (extract of circuit diagram attached)
• Poor adjustment of convergence at top and bottom. (+ extract of circuit diagram)
• E-W fault. (with circuit diagram extract)
• Channel 2 overload. (with circuit diagram extract)
• The luminance disappears. (with circuit diagram extract)
• Trapezoid shaped raster.
• Vertical foldover on top of screen. (picture attached)
• The upper part of the picture is not complete. (picture attached)
• Reduced horizontal size. (part of circuit diagram displayed)
• Sometimes the power supply breaks down after a short period. (with circuit diagram extract)
• Intermittent. Gurgles or vertical lines are present. (picture attached)
• Hum in audio. (with circuit diagram extract)
• K9/K11 band switch.
• No horizontal hold. (extract of circuit diagram attached)
• Cramp at bottom of picture. (extract of circuit diagram attached)
• Convergence changes.
• PSU switches (from 162V).
• Is occasionally unfocused (fault in the video amplifier). (with circuit diagram extract)
• Jumps from channel 1 to 3.
• Only pumps. (extract of circuit diagram attached) (service info for SIERRA -SA56K102)
• Blue convergence.
• Purity problems.
• Horizontal picture has shifted downwards. (SA56K102 tip from SIERRA)
• Gulps occasionally.
• Horizontal synchronisation does not lock. (with circuit diagram extract) (service info for SIERRA -SA56K102)
• No function, a gurgling sound may be present. (picture attached)
• Outer lines cannot be straightened. (extract of circuit diagram attached)
• Safety test after repair.
• TXT lines are visible in the upper part of the picture. Approx 3cm away from the upper edge of the picture (picture attached)
• Blown chopper transistor.
• Top foldover and retrace lines. (+ extract of circuit diagram)
• Goes for about 1/2hr rapidly switches on/off. (+ extract of circuit diagram)
• Pumps (E-W correction is defective). (part of circuit diagram displayed)
• Trips. (+ extract of circuit diagram)
• HT low. (picture attached)
• Width, E/W correction and the trapezoidal pot(s) do not function. (with circuit diagram extract)