TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	XR740	Unit would lock up when seek button was pressed	System control lock out would occur when seek button wasdepressed, otherwise all function buttons worked ok. by shutting unit offand then back on, it would work again until seek button was pressed.this symptom was noted on another unit (xr-787r) in the
SONY	XR787R	Unit would lock up when seek button was pressed	All functions worked ok until seek button was depressed.then unit would momentarily search up and then stop. at this time,system control lock out occurred that is, no function button wouldoperate. by shutting receiver off and turning it back on, it wou
SONY	CDP310	Defective optical device	Unit will not read toc or play discs.
SONY	EVS700U	Pcm dropout	Dropout occurs during pcm mode. stereo light flashes.
SONY	KV25XBR	No picture - sleep light on	These three units had a mass failure of the velocitymodulation circuit. d1651 shorted and opened the resistors and shortedthe transistors. the c board had dark spots on it around the resistors.the symptoms on these units were only sleep light on with n
SONY	KV2775R	Horizontal squeal by yoke	This unit had an intermittent horizontal squeal caused bythe yoke. attempts at covering the coils with silicone rubber, asinstructed by the tech. dept., did not resolve the problem.
SONY	KV1926R	Intermittent convergence, crt	This unit has intermittent convergence caused by the tube.
SONY	HVM302	Need p/n for former ic3 (df-bd) - see b & w s/b #75	S/m doesn't show p/n for former ic3 msm6205gs-k (24 pin). -hq comments: p/n listed in semiconductor replacement handbook is8-759-919-98. we will update this s/b to include this p/n.
SONY	EVA80	Unit would not load	Unit would not load. gear retaining clip missing for gearassembly. could not be found anywhere in the unit.
SONY	CDXR88	Dc-dc converter	Unit dead. no display. all fuses good. this was the secondunit the customer has had, first unit failed in the same manner. checkedfor 12 volts ok, 30v ok -5 was 1.13v and -5 ok. isolated +5 volt linefrom converter. found no shorts, used bench suppl
SONY	D55	Unit would not run	Unit would not run. found no -5v. dc-dc coonverter was bad.replaced dc-dc converter but still no -5v.
SONY	KV25XBR	Out of vertical sync	Out of vertical sync - w/no color and raster is dark.
SONY	WMF70	Headphone plug damages jack	Plug on mdr-a10 headphones, which come with wm-f10, seems tobe too long. if fully inserted, they make poor contact and one channelis intermittent. dealer here has complained of at least five units likethis.
SONY	CCDV3	Piggyback ic	Ccd-v3 has piggyback ic on ic301. what do you do to changeic? -hq comments: first 3000 units in production have this piggyback ic. wewill issue a s/b shortly on this.
SONY	VTX1100R	Dead set	When unit is first turned on, there are no functions fromremote control hand unit, except on/off function. manual functions allwere ok. after about 10 minutes, hand unit functions were all normal.inspection revealed signal present at base of q213, but
SONY	CDPC10	Distorted output, poor tracking	St. louis ssc claims they have had approx. 10 units with sameproblem. output is distorted, makes ticking noise, sounds scratchy.
SONY	XR550R	Won't play tapes	Load mechanism cycled continuously. catch on kick functioncam plate is worn out (114). trigger arm plate (109) is also defective.catch arm not long enough. replacement was noticeably longer and workedflawlessly.
SONY	SLHF600	False display	After about 30 min. the display would come on and then goblank. at this time the clock would flash. if a tape was in the unit itwould unload and then load again.
SONY	CCDM7U	No record	No record.
SONY	CCDV3	Intermittent no picture	Intermittent no picture. sample forwarded.