TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	KV2654R	Dark picture, replace c531 and r541	Picture is dark during normal transmission on all channels.
SONY	KV2649R	No display light, resoldered jumper	Display did not lite at all. lower channels did not comeon all the time (int). higher channels worked fine, picture was good.found no hp going to t001 (hpt) on mt board.
SONY	KV2647RX	Poor channel reception, replace vhf tuner	No low channels (2-6) reception.
SONY	KV1952RS	Intermittent shut down, replace c549	This unit intermittently shuts down. we found c549 to bethermally intermittent.
SONY	KV1920	Retrace lines on the picture	Few retrace lines were visible on upper left and lower center of the picture at maximum brightness.
SONY	KV1947R	Crt shorted out, replace crt, q601, q901, d516 and r605a	No picture. crt shorted out and in turn the following components went out: q601, q901, r605a and d516.
SONY	KV1747RX	Snowy picture on high channels	After unit would warm up, high channels (7-13) picture wouldbe snowy.
SONY	KV1711	Color flicker	Pulsating color.
SONY	KV1547R	Intermittent sound	Sound would cut out intermittently on vhf. unable to receiveuhf above channel 34. found catv/normal switch defective. this is thesecond unit i have found with this problem.
SONY	KV1500	No horizontal frequency lock	Horizontal frequency did not lock.
SONY	KV1357R	Picture distortion when operating on/off button, d-001	When operating on/off button, picture would either go intosnow or have severe 120 cycle hum in it. set could not be turned off.
SONY	KPR4600B	No picture, replaced q-956	Unit had no picture. sound would vary up and down. found lottransistor shorted.
SONY	KP5040	Vertical noise bar, connection change on r3383 and r3384	Unit had dark vertical line in the center of the screen, onlow channels. disconnected resistors r3383 and r3384 where they jointogether and connected them to pin 2 of ba-9 connector.
SONY	KP4000	Poor on no sound	This unit powered up but there was poor or no sound/picture.we found r107 on the q board to be defective.
SONY	FD30A	Poor focus, replaced crt	This unit had poor focus. the tube had internal shortputting 500 volts on the focus pin.
SONY	KX1901	Intermittent shut down	This unit intermittently shut down. we found the lead fromthe flyback to the hvr control to have a poor connection where the wireconnects to the metal retaining cap. the resulting arcing caused theunit to shut down. it was not possible to properly rep
SONY	KX1901	Weak sound on left channel	Left channel output is lower than right channel.
SONY	KV4100	Mechanical damage	Flywheel gear broken. at least 25 units are due intohollywood fsc with same complaint. no tape deck operation. so far 5units repaired. four out of five had defective gear. gear must bestrengthened.
SONY	KV2670R	No raster, r-526 open, c-527 open and q-504 leaky	This unit had no 1000 volt g2 screen voltage. r526 was open.c527 was blown in half. d508 was changed for safety. q504 was leaky.
SONY	KV2649RX	Poor focus on the screen, replace t861	Set had poor focus on right side of screen (about 4 inches).by tapping t-861, the focus would get worse or better.