56K549 / SIERRA [TV]

• The appliance breaks down after 1 min. A transformer or coil may be defective.
• East/west fault.
• Tuning drifts.
• No horizontal scan and hiccupping.
• The picture's width varies and the convergence jumps constantly.
• The power supply jumps. No very high voltage.
• Width decreases after a few minutes.
• North/south correction does not function.
• No contrast.
• No picture. Sound ok. Contrast is minimal and cannot be adjusted.
• 1/2 vertical scan (all volts ok).
• Horizontal sync dropout.
• Reduced horizontal size. (56K549 SIERRA repair tip)
• Outer lines cannot be straightened.
• No tuning on some channels. (SIERRA - 56K549 information)
• Replacement of the IC SAF1031P with SAF1039P.
• Intermittent red, green faces.
• The power supply jumps. The power supply unit is correct.
• Raster dented on the side.
• Dark picture, weak colours.
• White horizontal stripes.
• No vertical deflection.
• Occasionally no sound. Sound is too low. (56K549 tips)
• Gulps occasionally with a large beam current.
• AFT pulls when switch engaged.
• Rolling, no contrast and excessively bright picture.
• No audio.
• Difficulty with grey scale.
• Almost total vertical collapse.
• Vertical jitter. (when contrast high).
• Channels drifting, high band.
• Teletext lines on edge of raster (top few lines).
• No colour (horizontal shift).
• Hiccuping.
• Wine glass shaped picture.
• No or small frame (voltage reading seems normal).
• Only snow noise is present, no channel number indication.
• Vertical line in the middle of screen.
• No horizontal hold.
• Bridge rectifier blows.
• Patterning on screen.
• Gulps occasionally.
• Frame collapse at switch on.
• Picture and sound have rhythmical interference, even without the station, tuning voltage varies.
• Checking the PSU.
• Power supply repair method.
• No start-up (intermittently).
• Rolling when contrast or brightness varied.
• No function. No hiccuping.
• Only P0 in display. No picture, no sound.
• Luminance lines in the picture, the left hand side is darker.
• Noise in picture.
• K9/K11 band switch.
• No contrast control.
• Width, east-west correction and the trapezodal pot(s) do not function.
• Blank raster with flyback lines.
• Intermittent colour after T500 is replaced.
• Low HT. (SIERRA - 56K549 information)
• Safety test after repair.
• No sync and no sound. OK on empty channel.
• TXT lines are visible in the upper part of the picture. Approx 3cm away from the upper edge of the picture
• Convergence is faulty.
• The picture is crooked, E/W correction is not possible.
• Blown chopper.
• Vertical linearity fault. Cramp at bottom of picture.
• The picture is blurry and then disappears.
• Low contrast. (56K549 SIERRA repair tip)
• Gulps at switch off.
• Striations down sides. (SIERRA - 56K549 information)
• Dead.
• Lines above in the picture.
• Bowing at bottom of picture.
• Repeated power supply failure.
• Red, green or blue picture.
• Channel selector V311 no longer available, will be V317.
• Intermittent pincushion distortion.
• Afterglow fleck at switch off. (service info for SIERRA -56K549)
• Clatters, crackles, is noisy and the volume control is blocked.
• Switches off after aprrox. 1 min.
• Starts up for a short time, then fails.
• Goes into safety mode. (56K549 tip from SIERRA)
• Power supply ticking, fine if tripler disconnected.
• Colour flickers until appliance has warmed up. Stabilizes after a while.
• No E/W, reduced width.
• Flyback lines are visible.
• Intermittent. Gurgles or vertical lines are present. (56K549 tip from SIERRA)
• No function, there may be a gurgling sound.
• Only no. 1 appears on screen, no picture. Only background noise in sound. (56K549 tip from SIERRA)
• Thick white lines at the top of the picture.
• Connection of a loop system to the TV.
• New high voltage tripler.
• Franjas.
• Starts with 12, all channels are noisy.
• Picture width is too low, adjustment regulators do not react.
• Blue raster, no picture.
• VCR time constants: 26 C 568.
• Horizontal lines. (service info for SIERRA -56K549)
• Reduced vertical and horizontal size.
• No sound, dark picture (colour or R/C functions may not work).
• Problem of lines on the picture like noise in the picture.
• Vertical lines in the blank picture operation.
• Horizontal shift, no colour.
• Blows F601.
• E/W fault. (56K549 tip from SIERRA)