38KF5182 / SIERRA [TV]

• No colour. after a while.
• Audio fades (intermittently).
• Slight crackling of LF in standby.
• Impossible to change the standard. MP locks.
• FBT BU fails after a few hrs or days.
• No start-up from standby.
• Picture trembling according to its content.
• Very dark picture and one colour is missing. Colour signals very weak and the red square wave signal is missing. Picture flashes.
• Spontaneous channel switch-over. Sometimes picture becomes B/W. Appliance starts up by itself from standby.
• Switches off by itself (after warm-up).
• When pressing the memory button, the channel to be stored is lost and the front adjustment goes back into place, as well as the volume adjustments if it is manipulated.
• No channel storing.
• Pincushion effect on right and left edges of screen.
• Line BU508A heats up.
• Power supply BU and fuse blow at switch on.
• Colour prevailing and the power supply hums on picture.
• Impossible top open memory.
• In standby LED goes off after a few mins. Only starts up by switch.
• When changing picture the light reduces then returns to normal with another change of setup.
• R3462 burns, TR6420 heats up.
• BUT 11A (BT line) fails.
• No horizontal deflection. Display OK .
• Fuse blows at switch on.
• Picture too wide, wide horizontal amplitude. You do not see the M6 sign.
• White horizontal lines at top of picture.
• Flash and brief EHT drop out.
• Curling on the picture outlines.
• Edges of picture are wavy.
• Power supply stops completely when appliance is operating.
• BU508 blows at start up. Power supply seems ok, 160V without a load and 145V under load with 100W lamp.
• Fault in the 143V regulation.
• Fuse and power supply BU blow immediately at start up.
• With a test pattern, white flash with flyback lines at start up then fluttering at the white level, then ok. G2 voltage increases during these flashes. Same on the picture. (38KF5182 tips)
• Picture foldover on 3cm or 4cm at bottom of screen.
• Incorrect line spacing. Venetian blind effect.
• Displays 51 or another no. intermittently when starting up from standby and occasionally deprograms.
• Incoherent display.
• At start up the picture has dominant blue and green areas with flyback lines and slight moire then the screen goes black.
• No sound, no picture. Only the light comes on. Resistor 3220 68 ohm burns.
• No sound, no picture, no front panel. A slight initiation audible from power supply at switch on. (38KF5182 SIERRA repair tip)
• 175V instead of 110V on collector of E/W correction 6420. R3462 heats up and BF859 blows.
• Line spacing and strong moire.
• At switch on slight hum for 3 secs. in loudspeaker then no sound or picture. Channel indication ok.
• Power supply oscillates then cuts out. (38KF5182 SIERRA repair tip)
• Flickering picture (when cold).
• Reduced horizontal size.
• All programmes are lost.
• Excessive horizontal size. (38KF5182 tip from SIERRA)
• Picture is flickering very fast. on some channels. Fault reduces a few mins after start up. (SIERRA - 38KF5182 information)
• TEA1039 blows at start up.
• Horizontal stripe.
• Brightness varies suddenly.
• When the TV channel is changed the sound suddenly increases.
• Corrective maintenance of the PSU. (38KF5182 SIERRA repair tip)
• No sound, no picture, front panel does not light up. A slight motion can be heard from power supply at switch on.
• Top third of the picture is distorted and foldover on the bottom third. Sound ok.
• Picture foldover at the bottom of the screen. Elongated at the top.
• Foldover of picture at bottom of screen over a width of approx. 5cm, producing a significant vertical linearity fault (head is very long). Also in middle of screen is a fine, intense white bar.
• There is too much EHT when starting up. Flash on the screen.
• Reduce horizontal amplitude after 1 hour and BU508 blows.
• Distorted picture.
• Snowy picture on one half of the screen. This also occurs with scart and without the aerial. Earth has been checked. Sound is ok. Voltages are ok.
• After replacing memories, TV ok but erratic sound and brightness when appliance goes into standby by RC and is then switched on by RC. Everything ok when switched off from front panel.
• Power supply blocked.
• BU508A blows after 1 or 2 days.
• At start up very unstable picture and hum in sound then everything ok after a few mins.
• Occasionally appliance stops and starts up again. TEA1039, CNX, power supply BU, line power BU, TR6676 have already been replaced.
• Canal Plus becomes black and white with decoder.
• Line BU (BU508A) blows immediately.
• Excessive line amplitude, adjustment ok, BU508 blows after operating for a short time.
• Insufficient EHT.
• White horizontal lines at top of picture.
• Horizontal amplitude slightly less on right side. 1cm of picture missing.
• No function, display 12.
• People contour or horizontal lines are hatched.
• Frizzy lines on screen when cold.
• Value of voltages on the CNX.
• Fuse I600 blows at start up and BUT11 is destroyed.
• Does not always start up and occasionally begins to flash during operation.
• The appliance cuts out when cold or after a few hours. Power supply transformer TEA1039, BUT11, CNX62 have already been changed.
• The power supply stops after working for a few minutes. (this is not 6676 BC 328).
• 1cm waves on picture.
• BY blows or heats up too much.
• Very distorted and unstable picture. Incorrect video.
• Switches off by itself.
• Intermittent flash of light. (38KF5182 tip from SIERRA)
• Occasionally picture vibrates and EHT whistles excessively.
• Trips from time to time and in shock conditions. Solder joints are ok.
• Pulsating in time base. Connector 15G disconnected, power supply ok.
• Foldover at bottom of screen with a black part.
• At start up veiled picture and small fine black bands move up the screen. Picture improves when warm.
• Picture jumps particularly when cold. Line hooking. Filtering and voltages ok.
• If switched off by RC standby LED switches off after 3 secs. and power supply cuts out. Switch on is then only possible by front panel switch while simultaneously pressing any programme button on RC. If switched off by front panel switch all ok.
• BU blows at start up. Line frequency is ok. Power supply voltage is ok. Very high voltage is ok.
• Moire and venetian blind effect at switch on via tuner or scart.
• Vertical linearity problems.
• Vertical lines are frizzy. Very visible when cold then improvement noticed.
• Dead (after a few seconds).
• No start-up.
• No sound. Loudspeaker ok.
• Loss of channel memory.
• TEA1039 becomes O/C after 3 weeks.
• Corrective maintenance of the line scanning.
• Horizontal size varies. Knock sensitive.
• When pressing the On/off switch, red light lights up for 3-4 secs then goes out.
• Power supply modification (valid for a module with 90 degrees only).
• Black bars.
• Trips (when cold).
• E/W fault.
• Smoke from resistor (150K) in E/W module. E/W diodes ok
• No vertical synchronisation (intermittently). (38KF5182 SIERRA repair tip)
• No picture.
• Transistor 6420 (BF859) trips.
• At start up PR21 on the display. Vertical linearity fault.
• Line BU goes S/C every 2 or 3 days.
• Normal sound, picture present but with significant moire effect which disappears after 10 to 15 secs.
• Dead. (service info for SIERRA -38KF5182)
• Picture shakes vertically and the contrast varies.
• Shuts down (after warm-up).
• At start up very unstable picture and hum in sound then everything ok after a few mins.
• Very dark picture on a blue background. No brightness adjustment. Sound ok. Picture disappears if G2 pressed.
• The fuse 1600 blows when starting up. Good BUT 11. Good capacitor 2609, 2610, 2605. The diode 6655 is correct.
• Picture jitters.
• R3462 on the East/West circuit fails (100%).
• At start up some channels go out of tune but not all at the same time. From then on difficult to memorize them.
• Display flashes , noise in the sound and darker bars over the entire screen.
• BU508 heats up after working for a few hours. CD signal seems ok.
• R3320 becomes defective after 1 hour of operation.
• Defective line transistor after 5 to 10 days. The IC, transistors and capacitors have been changed but the fault persists.
• Streaky vertical lines and face outlines.
• R3328 burnt.
• Control panel does not work. No display. Picture is ok. Microprocessor has already been replaced but with no result.
• Trips (intermittently).
• No sound and picture via tuner. Sound level blocks.
• Deprograms and displays 51 or something else intermittently when starting up from standby.
• At start up display shows anything and sometimes memory is lost.
• Cycles on/off.
• Occasionally picture jitter. Vertical deflection seems the cause as bar runs through occasionally and picture is distorted at bottom of screen a few mins after switch on.
• Flashing display.
• Picture shakes depending on picture content. Begins to fail.
• Occasionally black and white or stripy picture.
• Unstable frame with distorted picture for 5cm at bottom edge. Canal Plus is extremely unstable.
• Curling or small thin horizontal lines on the picture.
• BU508 blows every fortnight.
• Frizzy vertical lines (sawtooth effect). The lines may scroll from the top to the bottom or vice versa.
• Significant moire with venetian blind effect.
• Flickering picture.
• Line BU508A defective. Power supply pulsates after replacement. Power supply ok.
• Power supply starts up then stops suddenly. Impossible to start up again.
• Poor sandcastle signal on output of pin 17 of the TDA 2579N5. The signal given by the oscilloscope is the line signal.
• No power supply of TEA1039 in the PSU.
• Lights up on key 29. Does not always respond to the codes of the RCU which is not defective.
• Black screen.
• Comes on for a short time.
• Flyback raster at switch on on the whole of the screen then occasionally disappears and comes back again before disappearing again after approx 20 secs.
• Intermittent white flash especially when cold. Dark picture. G2 insufficient to adjust brightness.
• Hum in loudspeaker in standby.
• TEA1039 blows after 1 or 2 days.
• Driver transformer 5322 collapses near BC337 which heats up.
• Poor focus.
• At switch on brightness varies quickly then is normal when TV is warm. G2 voltage ok, power supply voltage ok.
• Smoke from resistor 3320 at switch on. (service info for SIERRA -38KF5182)
• G2/focus pot catches fire.
• No function after a slight volt-rise. Fuses, TEA, CNX, diode bridge, resistors, capacitors, transistors and BUT ok.
• BU blows every 2 or 3 days.
• Excessive picture width and no adjustment possible. No E/W. Voltages ok.
• Line distortion and raster according to picture content.
• Audio module transistor blows after a month.
• Significant curling on vertical lines. Capacitor 2304 (line driver power filtering) has been changed.
• Dark screen. Line transformer ok. Picture on scart.
• Very strong morie (service info for SIERRA -38KF5182)
• Secondary power supply at 50V instead of 143V with hum. Display ok.
• Start up ok after power cut. Does not switch on again if switched off from standby. LED lights up for 2 secs then switches off.
• Screen lights up briefly when selecting stop. No LED. (service info for SIERRA -38KF5182)