SA66K602 / SIERRA [TV 70-74 (66-70) cm picture]

• Vertical flybacks visible at the top edge of the TXT stations. (SA66K602 SIERRA repair tip)
• Convergence changes.
• No picture.
• Channel 2 overload. (+ extract of circuit diagram)
• Is occasionally unfocused (fault in the video amplifier). (+ extract of circuit diagram)
• No start-up (intermittently). (part of circuit diagram displayed)
• No start-up.
• The picture runs and pulls (distorted), strong signal. (picture attached)
• Bowing at bottom of picture. (part of circuit diagram displayed)
• Purity problems.
• No E-W. Reduced width. (part of circuit diagram displayed)
• Intermittent North/south fault, in cold conditions ok. (SIERRA - SA66K602 information)
• Flyback lines and picture cannot be made darker. (extract of circuit diagram attached)
• K9/K11 band switch.
• Weak horizontal synchronisation. (part of circuit diagram displayed) (SA66K602 SIERRA repair tip)
• Gulps at switch off.
• Picture grainy and sound noisy.
• Top of picture cramped. (picture attached)
• Poor convergence top 4"blacked out. (picture attached)
• Picture shading from left to right.
• Low vertical, 2" picture.
• No video and reduced width.
• Brightness control does not function.
• Switches on with 12, all channels are noisy.
• Insufficient saturation.
• Grey scale drifts slightly. (SA66K602 SIERRA repair tip)
• Repair method: PSU.
• Retrace lines when channels change. (extract of circuit diagram attached)
• Patterning on screen.
• TXT lines are visible in the upper part of the picture. Approx 3cm away from the upper edge of the picture (part of circuit diagram displayed)
• Tripping only with tripler connected (No picture, no sound). (with circuit diagram extract)
• PSU switches (from 162V).
• Lines in lower part of picture. (part of circuit diagram displayed)
• Flyback lines or top of picture is shaded.
• Connection of a loop system to the TV. (SA66K602 tip from SIERRA)
• Gulps occasionally.
• Blown chopper transistor.
• Picture fails
• No function, a high voltage is present. (part of circuit diagram displayed)
• Dead.
• Picture is too small./
• No functions. (extract of circuit diagram attached)
• Blue convergence.
• No vertical deflection. (service info for SIERRA -SA66K602)
• Vertical foldover on top of screen. (with circuit diagram extract)
• 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. (extract of circuit diagram attached)
• The power supply functions irregularly. (part of circuit diagram displayed)
• Striations down left hand side of picture.
• New high voltage tripler.
• Rolling, no contrast and over bright picture.
• HT low. (extract of circuit diagram attached)
• Top and bottom horizontals curve into the middle plus colour fault.
• The sound controls unevenly.
• Goes for about 1/2hr rapidly switches on/off. (picture attached)
• Afterglow fleck at switch off.
• Blows mains fuse 1-2 hrs. (part of circuit diagram displayed)
• Contrast and/or brightness do not function.
• No audio. No picture. (picture attached)
• Sometimes vertical line appears in picture.
• Picture height is only 10cm. 10cm line from picture centre. (+ extract of circuit diagram) (SIERRA - SA66K602 information)
• The luminance disappears. (picture attached)
• Various picture problems.
• Noise in picture.
• Trapezoid shaped raster. (SA66K602 SIERRA repair tip)
• E/W error. Picture width is too small. Controls do not react.
• Low horizontal amplitude after protection disabled by O/C 6560. (part of circuit diagram displayed) (service info for SIERRA -SA66K602)
• Squealing from PSU. (picture attached) (SA66K602 tips)
• The appliance gurgles occasionally after extreme luminance variations and when starting up the appliance. (part of circuit diagram displayed)
• Thick white lines in the upper part of the picture. (with circuit diagram extract)
• Contrast control does not function or is unstable.
• Safety test after repair.
• The colour is faulty. (extract of circuit diagram attached) (service info for SIERRA -SA66K602)
• Vertical lines on the left on blank raster/parasitic oscillation. (extract of circuit diagram attached)
• IC TDA2571AQ (4822 209 80646) no longer available. (SA66K602 tip from SIERRA)
• Convergence pot R672 and R717 do not control enough. Red-green does not coincide. (picture attached)
• Reduced horizontal size. (picture attached)
• Lines in upper picture section. (SIERRA - SA66K602 information)
• One colour missing (dark picture).
• The picture enlarges and decreases in size during operation. (part of circuit diagram displayed) (SIERRA - SA66K602 information)
• Intermittent. Gurgles or vertical lines are present. (+ extract of circuit diagram)
• Trips. (+ extract of circuit diagram) (SA66K602 tip from SIERRA)
• Tuning drifts.
• Either red, green or blue colour difference signal is missing.
• No colour or very weak green. (part of circuit diagram displayed) (SA66K602 tip from SIERRA)
• No picture, no raster. (picture attached)
• Low brightness.
• Bright flash on screen, no picture or sound. (part of circuit diagram displayed)
• Line collapse, lack of width or small picture.
• Lines in top part of picture. (with circuit diagram extract)
• The colour is unstable in the background; after being adjusted, it changes completely after a short period. (+ extract of circuit diagram)
• Picture is too bright, flyback lines, screen is darker on left side. (extract of circuit diagram attached)
• No E/W correction or low/width striations on the right hand side. (part of circuit diagram displayed)
• No tuning on some channels.
• BU208 fails continuously.
• Line choke S172 squeaks. At switch off lights up like a Christmas tree. (+ extract of circuit diagram)
• No colour. (part of circuit diagram displayed) (service info for SIERRA -SA66K602)
• Bu i netdel kortslutter (per.)
• Little or no vertical scan. (+ extract of circuit diagram)
• Bowed verticals. (SA66K602 tip from SIERRA)
• No horizontal hold. (part of circuit diagram displayed)
• Sound fades after short while.
• Occasionally a line appears on screen (skips).
• Picture tube problems.
• Dark picture. Weak colour. (picture attached)
• Sometimes picture disappears. Wrong channel LEDs light up. (+ extract of circuit diagram)
• Top few lines foldover. (with circuit diagram extract)
• Cramp at bottom of picture. (with circuit diagram extract) (SA66K602 tips)
• The picture is blurry and then disappears.
• Dark picture, weak colours. (part of circuit diagram displayed) (SA66K602 tips)
• Jumps from channel 1 to 3. (service info for SIERRA -SA66K602)
• Fuse switches when changing channel and picture. (picture attached) (SA66K602 tip from SIERRA)
• Severe AGC overload. (with circuit diagram extract)
• Dead. 95V supply 15V.
• Set comes on after a while.
• Pumps (E-W correction is defective). (extract of circuit diagram attached)
• Vertical picture shifted to left.
• Vertical collapse. (SA66K602 SIERRA repair tip)
• Horizontals at top and bottom curve into the middle.
• Appliance pulsates (SA66K602 tip from SIERRA)
• No power and rail voltage 19V only.
• No north-south correction. (extract of circuit diagram attached)
• Line output transistor T 446 fails repeatedly. (SA66K602 tips)
• Weak vertical synchronisation.
• North-South fault. (+ extract of circuit diagram)
• No HV. (extract of circuit diagram attached)
• Fuse VL170 is defective. (+ extract of circuit diagram)
• Flyback lines in picture.
• Picture is missing, sound missing or poor.
• Bowed horizontals.
• Convergence fault. (extract of circuit diagram attached)
• Width, E/W correction and the trapezoidal pot(s) do not function. (with circuit diagram extract)
• Hum in audio. (extract of circuit diagram attached)
• Width pulsates. (+ extract of circuit diagram)
• There is a black line in the upper part of the picture, only part of the picture is visible. (picture attached)
• Red, green or blue picture. (service info for SIERRA -SA66K602)
• Picture gets darker; no colours (blue and red). (+ extract of circuit diagram)
• Flyback lines in the picture.
• No function, a sluggish gurgling sound is present in the power supply. (+ extract of circuit diagram)
• Channel selector V311 is no longer available, will be V317.
• Top foldover and retrace lines. (with circuit diagram extract) (service info for SIERRA -SA66K602)
• Sometimes the power supply breaks down after a short period. (picture attached)
• Horizontal tearing at bottom. (extract of circuit diagram attached)
• Horizontal picture has shifted downwards. (service info for SIERRA -SA66K602)
• Defective dynamic convergence.
• Picture rolls in at the bottom or a line appears in top third of screen.
• Blank raster.
• Horizontal shift. No colour. (with circuit diagram extract)
• The power supply makes a high whistling noise, otherwise the appliance functions properly. (picture attached)
• Only pumps. (with circuit diagram extract)
• The red-green convergence is faulty. (+ extract of circuit diagram)
• Poor adjustment of convergence at top and bottom. (part of circuit diagram displayed)
• Curved sides, plus another possible line fault. (SA66K602 SIERRA repair tip)
• Outer lines cannot be straightened. (extract of circuit diagram attached)
• Horizontal synchronisation does not lock. (picture attached)
• E-W fault. (+ extract of circuit diagram)
• PSU hiccups with HV and sound.
• N/S correction is faulty, curves in the upper and lower parts of the picture. All regulators do not function. (part of circuit diagram displayed)
• Picture is missing, raster poor or varies, sound ok.
• The picture's width varies and the convergence constantly jumps. (+ extract of circuit diagram)
• Incorrect or unstable picture size.
• Crackles, rattles and the volume control is blocked. (part of circuit diagram displayed)
• Striations or thin flyback lines. (SIERRA - SA66K602 information)
• PSU switches on (no pumping). No switch on with slow power up. (extract of circuit diagram attached)
• Blue convergence, R667 (above horizontally) does not function. (+ extract of circuit diagram)
• Sometimes horizontal output stage (drive) fails. (SIERRA - SA66K602 information)
• Occasionally sound is too low or fails. (SA66K602 tips)
• Safety test after repair.
• The picture becomes crooked on the lower side.
• The upper part of the picture is not complete. (part of circuit diagram displayed)
• Picture skips to the left. (picture attached)
• No power supply. Protection circuit triggered. (extract of circuit diagram attached)
• Unstable frame control or frame jitter or frame synchronisation missing or lack of height.
• No function, a gurgling sound may be present. (part of circuit diagram displayed)
• No picture. Sound ok.
• Intermittent pin cushion distortion.
• Two horizontal bands of white dots. (picture attached)
• Supply voltage is guzzled.