TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	EVDT1	No power tape jammed in unit	Unit came in with tape jammed in the mechanism. after thetape was removed, the set would not function. the standby lamp was lit at all times when the set was plugged in. no other functions were operable.
SONY	CCDF55	No picture and sound playback	No picture and sound during playback. found screw no. 26,page 102 too long which causes fp-247 damage at the middle (open pinno. 11 and no. 12).
SONY	CVPG500	Unit does not print	The bracket just above reference number 211 on page 105 ofthe cvpg500 service manual was bent at the point where the post goes intoreference number 204.
SONY	GV8	Distorted video during playback	Distorted video playback. record was fine. appeared to be losing sync partially and tearing in picture.
SONY	D15	Hyperactive sled motor causing skipping	Skipping - overactive sled motor. replaced laser, servo ics,and even boards to no avail.
SONY	CCDF55	Distorted picture, looks like clogged heads	Picture looks like bad heads.
SONY	CCDF33	No video out - camera mode	Iris closed, no output from drive ic807. when pin 6 ofic-807 was taken low, the iris opened.proper operation of the iris detect circuit was verified by biasing onq-644, q-611 and q-609. however, q-609 collector stayed at 4.8 v.found r-626 at the emitte
SONY	KV20EXR10	Clock is running fast, see service bulletin 87r1	Clock is running fast, gaining about 1 hour 50 minutes a day. -hq comments: please see service bulletin number 87r1 for additional information .
SONY	CFSD960	Fast forward slipping	When ff a tape from beginning, the movement is smooth. how-ever, the t/u reel gets full, the limiter assembly number 519 looses firmcontact with reel gear number 530. there is gear grinding then eventuallyno more movement. -hq comments: tokyo has been
SONY	XR7200	Unit dead	Unit dead, tape operates. no display or audio.
SONY	CFD68	Stripped gear - ref202	Gear has two teeth tracks. smaller set at center of gear hashad teeth broken off all around. no proof, but appears the problem is dueto an intermittent limit switch. fop will come in to read t.o.c. andsled motor will continue to run, causing gear to sh
SONY	CCDG1S	Dead	Dc dc convertor would not turn on. placing 4 volts dc onoutput of ic-431 caused the unit to work.
SONY	KV27XBR10	Intermittent vertical collapse, replaced the arcing crt	This unit had a vertical collapse problem due to static sig-nals getting into the jungle ic-301. one way to isolate the problem isto monitor vertical drive of pin 31 of ic-301 with a scope. made a note ofthe interuption of the vertical signal of pin 31.
SONY	KV2675R	Relay chatters, c-609 open	When unit is turned on, relay chatters and shuts down.replaced relay and traced to c-609 which was defective.
SONY	TAE77ESD	Digital input does not function	Digital input 1 and 2 do not function. all other inputs checkok.
SONY	KV2785R	Intermittent start-up, replace r-655	Set would occasionally not come on. no output from power supply. component inspection of ga board showed r-655 increased in value to at 2.0 meg.
SONY	EDV9500	Slight shadowing or ghosting	A shadowing or ghosting effect can be seen around objects ina scene during playback.
SONY	CCDTR5	Blue and orange around dark objects	Blue and orange highlighting appeared around dark objects.
SONY	CDXA20	Unit will sometimes not function - error 04 comes up	The unit will sometimes not function. when it does function,it works fine. upon examining the rf pcb, found an oily substance on thepcb. discovered that c52 had leaked. this is a filter cap for the +5vsupply line. the cap is rated at 6.3v. should i
SONY	WMAF54	Poor fm reception	Unit will only receive the strongest fm stations. weakstations are muted, and border line stations will constantly switch in andout of mute.