Sony TV Repair: Common Faults and Solutions.


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Sony Repair Guide: Common Issues and Fixes

Brand Model Fault Detailed Problem Solution By
SONYKV1970R
Aux displayed on the screen, see sb 208r1Aux character is displayed on the screen. the character can be turned off by using the rm-718 remote control unit (the tv is supplied with the rm-717 remote commander).
SONYKV1947R
No color on channel 5 only, 73mhz trap installedNo color on channel 5 only. this may be due to the fact thatthe cable company refuses to make cable connection to user unless thecable convertor box is used.
SONYKV1924
Intermittent shut downThree spots on pix tube caused by an intermittent shut-down.customer keeps watching until spots get bad. servicer has had two andi know of 3 more.
SONYKV1922
No audio nor videoSet has no audio nor video.
SONYKV1922
No rasterAt full voltage, output (horiz) transistor would get hot andthen short. found the horiz. drive (q507) signal was distorted. tracedproblem to c526 (leaky) causing bias to change on drive transistor.
SONYKV1711
Intermittent vertical and distorted pictureVertical intermittent. pix moves up, changes linearity andshakes.
SONYKV1547R
Vhf tuning drift and uhf no tuningUnit displayed several problems: on vhf high and low channelswould drift, sound would mute, unable to get uhf, not all uhf numberswould display. found catv switch intermittent. with switch in thenormal position 2.4vdc would appear on ic001 pin 39 (sho
SONYKV1354R
Dark picture, replaced c-556 and r-557This unit had a dark picture caused by c556 shorting andopening r557 in the 800v line.
SONYKV1331
Dark picture, replaced d-513, r-557This unit had a dark picture.
SONYKV1222RS
Turn off by itself when warm, replaced c005Set would turn off by itself. could not turn on nor enterremote functions when warm. could flex board and unit would act up.found problem to be c005 was missing from board.
SONYKP5040
Intermittent no vertical deflection, replaced q951Intermittently the green picture would fold over at the topand sometimes loose all vertical deflection. when this happened, theset would blank all three crts. cooling the vertical drive transistorq5529 would restore proper operation. this was very mis
SONYFD30A
No video and retrace lines on the raster, replaced r409Picture has retrace lines, raster ok, no video.
SONYKV2670R
Dead set, open relaySet could not be turned on at time of delivery. servicer hasnot received service manual as yet and requested my help. inspectionrevealed that the relay would not close. relay winding was open.
SONYKV2670R
No picture, h out q-504Several units have had the horiz. output transistor q504fail shortly after initial turn on. the devices seem to fail of theirown accord. we can find no other problem. suggest replacement with asturdier device.
SONYKV2643R
Shutdown after two minutes, removed jw-54Unit would play for about 2 min. and then shut down. puttingunit on variac at 90vac, unit would play.
SONYKV2101
Intermittent high-pitch noise, h lin coil l-803Intermittent high-pitch noise.
SONYKV1917
Intermittent shut downIntermittent shutdown.
SONYFD30A
No audio, open ground between g and k boardNot audio.
SONYKX2501A
Dead set, replaced d1514The power supply was whistling and there was no picture orsound. we found d1514 in the high voltage regulator to be shorted. thispresented about 30Ω to the 140v line. the fuse never opened.
SONYKV2648R
Heavy arcing, resoldered broken etchWhen set was turned on, heavy arcing would occur around theflyback. servicer had replaced the flyback, which did not help. foundground etch near t503 was open. this caused the flyback return to beopen. we discovered this by connecting the osc. ground