TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	KV2643R	Small pix/premature shut down, replaced l810	The picture was pulled in from the side about 2 inches andwould prematurely shut down. we found l810 to be shorted.
SONY	KV2665	Sound cuts out, "a" board ic-201	After the first 15 minutes of operation the sound would cutout. the set could be turned off and on once and continue to operate correctly the rest of the day. also the sound level was somewhat low.
SONY	XR65	Continuously scans (am)	Unit continuously scans in am mode.
SONY	KV2649RX	Jig adapter information	Servicer has sylvania (ck-3000) test jigs in shop and wants touse them on kv-2649rx chassis. found the inductor in the jig burned out. -hq comments: the following adapters are available from telematic,108-02, otis ave., corona, ny 11368 (718) 271-5200
SONY	D5	Unit would start up and then almost immediately shut down	Unit would start up and then almost immediately shut down.found the -5 volts missing due to defective dc convertor.
SONY	SL2700	Unit would not record from timer	Customer complains that unit would not record from timer.i verified that when in timer record mode, power would come on but unitwould not start up. found d22 on timer ii board open.
SONY	CDP101	Audio	Servicing dealer had worked on unit several days. whiletrying to adjust unit, disc would suddenly speed up and then reject. alsosometimes in stop mode, we could hear disc motor running erratically. atfirst, we tried to localize problem to rf section,
SONY	CDP101	Audio	Dealer complaint was won't accept discs. found that afterinsertion, discs would spin faster and faster until system rejected andtray opened. stop mode adjustment checked ok, rfck 1/4 present on ic201.opening gfs switch caused disc to spin erratically,
SONY	STRVX750	Audio	Unit doa. replaced power supply inverters. when we switchedto 4-6Ω on sp impedance sw, unit smoked r813 and went dead. furtherinvestigation showed -28vdc supply shorted to ground.
SONY	BMC110	Pinch roller ass'y	Bmc-110 uses two different pinch roller assemblies, which arenot interchangeable. also the same number is given for the bmc-220. -hq comments: pinch arm block assy (a-6747-230-a) has been substitutedto a new (-b) version. this new (-b) version will au
SONY	SL5800	Bearing pg 3-10, #426	Part #3-646-185-00 (bearing) shows as no longer available.please advise if there is a substitute that is not in computer. -hq comments: the bearing, ref 426, is no longer available. when thispart is needed, please order the following parts together:
SONY	WMF15	No audio	Headphone jack broken.
SONY	SL2401	Preset volume block	Servicer ordered this part and received a part that fitperfectly but the switches had only three positions, yet this unit is catvready. the microfische shows 1-230-125-00 for the sister set sl-2406. -hq comments: the preset volume block part number lis
SONY	CFS77	Motor pulley	The pulley being supplied by kc is for a square belt. thepulley required is for a flat belt. kc insists that they are providingthe correct part. please investigate this problem for me. -hq comments: two pulleys are listed under the same ref. no. 455
SONY	SL2700	F/l ass	Dealer stock unit is physically damaged. tape transport isbroken. please advise part number for complete assy. -hq comments: a new cassette compartment assembly is now available(p/n a-6751-236-a). we will be issuing a t/n on this subject.
SONY	SL2710	S/b 164: sound noise during p/b of a timer recorded tape	This mod was installed in these two units and it resolved theproblem. in two other units the mode was installed incorrectly by twodifferent technicians and the units had no beta hifi record. afterinstalling the mod correctly the units worked good. -hq
SONY	TCFX500R	Interconnecting problem (rm-44 with tc-fx500r)	When these 2 units are hooked together and the remote ffbutton is pushed, the tc-fx500r goes into the rewind mode. -hq comments: the rm-44 is designed for used with components: st-jx44,ta-ax44 and a tape deck (tc-fx44 or 500r). in this set-up, the gnd
SONY	STRVX200	No memory	No memory. if i held pin 31 high with an external supply thenshut off power to the unit then shut off the external supply the batteryb+ was not loaded down.
SONY	KV1952RX	No raster, no volume, no channel display, replace q2002	No raster at turn on. raster may be seen for 1/2 second. novolume, no channel display, b+ present, high voltage present.
SONY	TCK777	Part # of the relay	A tech ordered ry501 by the part # 1-515-323-21 listed inthe service manual. but it seems that it is not registered in thecomputer. this is a part # 1-515-323-00 in the computer. i think theyare same. we are going to try to order 1-515-323-00.