TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	VCL4058	Use of 4x teleconversion lens with 8mm cameras	Can vcl-4058 be used with 8mm cameras? -hq comments: we have checked with tokyo and they have advised us asfollows: ccd-v8afu, v110 - compatible v8, v3 - not compatible
SONY	CCDV8	No camera power	Camera dc-dc converter (dr902) goes dead when aw-1 board isconnected to it via cn702. -hq comments: lift each wire from cn702 (one at a time) until you canisolate which voltage is being pulled down. check for shorted 2v or 3vregulator circuit on aw-1 b
SONY	BMC550	No capstan or drum rotation	Pressing record button, no capstan or drum rotation. allsignals from system control ok. found no output from pin 12 of ic201,cs-5 board. ic201 was defective.
SONY	BMC660	Unit will not white balance under mercury vapor lighting	Customer taped outdoor football game under mercury vaporlights. unit would not auto-white balance and would not produce any redcolor during playback. -hq comments: i contacted tiffen mfg. and they suggested a combinationof #50 red, #20 yellow, and a #2
SONY	STS555ES	Output was being muted intermittently	Unit would intermittently activate mute relay. also, stereolight would flicker. checked discriminator and mpx vco. both were withinspecs. control signal causing mute circuit to activate came from micro-processor. further tracing found mute output fr
SONY	KV1981R	Cannot turn off set, replace ic103	After set on for a couple of hours press power button pixgoes black then comes back. picture setting is at minimum when pixreturns.
SONY	KV2657R	Incorrect part number, cover neck	Incorrect part # 9-910-999-51 correct part # 4-334-942-00 -hq comments: we will publish service bulletin on this.
SONY	STRVX5	Wrong part number in manuals	Incorrect p/n 1-121-361-00 correct p/n 1-123-361-00 -hq comments: we will issue a service bulletin.
SONY	KV2084R	Remote control button failure	Excessive and repeated remote control failures due to remotecontrol sheet rubbers are open. the following buttons are usually open:picture/volume/channel.
SONY	TCFX510R	Unit comes on in rec mode	When the unit is turned on it appears as if the record buttonhas been pushed and is waiting for the play button to be selected. also,the tape counter does not work nor will the rec/play timer function.
SONY	TAAX360	Incorrect part number for ic-101	Both ic
SONY	CCDV8AFU	Four vert. lines in picture during e-e or camera recording	Four evenly spaced vertical lines appeared in pix during e-eor camera recording. also appears during self recorded playback.
SONY	KV2644R	Retrace lines, replaced r749	Retrace lines in pix.
SONY	KV2645RS	Audio pop on channel change, adj t207	Loud audio pop on channel change, power on, or power off.changed t207 on a board, this reduced pop somewhat, but did not eliminateit. adjusted t207 while changing channels to eliminate popping.
SONY	RME100V	Picture dropouts on tape recorded on evs-700u from ccd-v8afu	Dropouts occur in lp recording mode.
SONY	SLHF400	Snowy picture in betascan when warm (approx. 1 hr of use)	After running the unit for approx. 1 hr, when cue or reviewis used picture is extremely snowy. unit was very temperature sensitive.
SONY	XR77	No loading	Cass will not load. this happens on models xr-50, xr-70.and xr-77. 385 deforms with use (years) to the point where loading isincomplete. 387 joint lever assy can latch 386 threading arm assy. removecass holder, then carefully bend upwards to restore 9
SONY	ESR10	Wrong part number	Reference numbers 229 and 230 are crossed. in orderingreverse pinch roller (item 230 on page 26 of service manual), i receivedforward pinch roller (item 229). -hq comments: we will issue a s/b.
SONY	KPR4110	Cp6001 open, replaced cp6001	This unit is used with a panasonic vcr pv-1770 and when thevcr comes out of the scan mode (review) the unit will go into hv shutdownand sometimes open cp-6001. this is caused by a problem with the vcrchanging the horizontal freq. this unit opened cp-60
SONY	SL5200	Int. blows f001 and q002	Unit would very int. blow q002 and f001. it was very hard tolocate the problem because short would disappear on the 12v line before itcould be located.