TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	D3	Poor tracking	Unit does not track very well. eye pattern looks very poor.
SONY	KV2080R	Hi pitch squealing, replace l1507	L1507 causing an objectionable hi pitch squeal.
SONY	SLHFT7	Not recording audio	Not recording audio on longitudinal track.
SONY	KV1948R	Dead, replace d631 and r603	R603 fails after one month of operation due to a missing d631on e-1 board from the factory. this is the second unit with this problem.
SONY	CDP110	Roller guide for chucking arm assy comes off	Roller guide for chucking arm assy comes off. this rolleris a brown one.
SONY	CDP510	Roller guide for chucking arm assy comes off	Roller guide for chucking arm assy comes off. this roller isbrown one.
SONY	WMF77	Incorrect part no for fwd idler assy	P/n for ref. 211 page 26 wm-f77 service manual is wrong.p/n x-3335-724-1 is no given, but this same number is also used asref. 233 same page called chassis assy, mechanism. need correct p/n forref. 211 idler assy.
SONY	KPR4150	No raster, no display, sleep light on	Set would come on with hi voltage, no raster, no display,sleep light on. found 15vdc missing, trouble was traced to l8, 5.6uhchoke opened.
SONY	KV1946R	Dead, replaced c556	Unit was dead, with an external dc power supply, turned on oscilla-tor, connected variac, brought it up to 70vac, output of oscillator wasgood but to the base of driver distorted. found c556 leaky. (also thehorizontal output had shorted and fuse burned.)
SONY	PCM701ES	Dead unit	Two fuses and transistor bad. replaced parts. all functionsnormal. set unit aside to run. after approx. 3 hrs audio failed thoughmeters still worked. found transistor had gone bad and collector shortedbut on removal of transistor found trace was sti
SONY	SL300	Broken s gear	Unit came in with broken gear. installed replacement, whichalso broke. -hq comments: i am sending you a new s gear kit. this parts kit will bestocked in the future.
SONY	EVC8U	Need to feed mic input to 12 pin cam connector	Need to feed mic input to 12 pin cam connector. refer topage 96 s/m. cn113, pin 2 mic cn007, pin 7 cam/linehow to switch to mic? -hq comments: this 12 pin connector is a multi-connector with manyapparent applications. there is a serial control l
SONY	LC710	Need plastic piece on charging strap or complete strap	Customer needs plastic pieces on lc-710 carrying case. -hq comments: this part as well as the strap is not stocked in japan.the part will have to be removed from a case in stock.
SONY	KPR4150	Inverted image, replace lens, see s/b tvp0302	In reference to fpr sept 1, the improved green lens wasinstalled. technician informed me there was a 90% improvement. theinverted image had all but dissappeared. he said that in a total darkroom and only with certain screens an inverted image could be
SONY	D3	Broken printed pattern	Battery won't hold or take charge.
SONY	CCDV8AFU	No rf out	Rf unit had video out but no audio out.
SONY	CCDV110	No picture in camera mode due to cold solder	No picture in camera mode.
SONY	HVC2200	Green filter in front of trinicon tube	Customer needs green filter in front of trinicon tube. -hq comments: this is not available. please order a complete trinicontube.
SONY	SL2710	Service bulletin no. 277 needs revision	Ordered part as per s/b no. 277. part had boss whichinterfered with mechanical chassis.
SONY	CCDV8AFU	Part no for ring in zoom lens ass'y	Need part number for ring at front of zoom lens ass'y. -hq comments: because of the precise optical axis adjustment needed forthe zoom lens ass'y, the assembly is not done in sony factory soreplacement parts are unavailable.