TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	CDP310	Disc spins backward	When replacing this part in a cdp-310, it was discovered that the motor is mounted 180 degrees from where it should be. this causes the motor to run backward when installation is completed.
SONY	EVS700U	Control s jack	What type, if control is control s? -hq comments: control s is sircs, the same as our remote controls.sircs is described in the (sony remote control systems). manual partnumber is 2rm383-1.
SONY	CCDV9	P/n for shipping carton	There is no part number listed in the service manual forshipping carton. -hq comments: part number is 3-719-839-01. a service bulletin will beissued.
SONY	FD42A	No video, resoldered q401	Cold solder on collector of q401.
SONY	CDPC10	Gear gets damaged	Gear referred as item no. 321 on page 44 of service manual isstripping probably from excessive stress when customer uses certain thick-er audio discs. servicer reported failure of several units.
SONY	CCDM8U	Door will not latch and will not eject	Unable to complete any mode. found defective cam, adhesivefailed to bond contact wipers. initial mechanical motion during ejectappears normal with the ls assy. rising. just before actuation of thetray latch it will pause briefly, reverse direction and
SONY	SPP80	Bad part number	Ordered new d.c. jack per p/n in manual. received phone jacklabeled as d.c. on pick ticket.
SONY	WMD3	No record; erase only	No record erase only. playback of prerecorded tapes was ok.
SONY	CCDV9	Frozen iris in lens assembly	Will record sound but no video.
SONY	CDP750	Would not play	Unit would not play, found s251 defective.
SONY	SL250	No pix or sound pb	There was no picture or sound in playback.
SONY	STRVX550	Stk3042 and related voltage amp ics in audio products	I believe that the majority of failures are heat related. ihave solved this problem in the past by adding a substantial heat sink tothe ic, bonding it with a thermal proxy. this reduced operating temp. by20 degrees c. i believe this greatly improves r
SONY	KPR36XBR	Snowy picture, resoldered swaf circuit	Set was very snowy and had a very bad ghost. tuner and pres-caler had been replaced. video out of ic201 pin 20 looked very weak.found by touching swaf coil picture would improve. resoldered all connec-tions (swaf), problem resolved.
SONY	TAAX435	Fuses, f3, f4, f5 and f6	R-803, 804, 805 and 806 have been replaced with a 3.15 ampmicro fuse. the fuses are designated f-3, f-4, f-5 and f-6. -hq comments: we confirmed this problem with tokyo. they changed fuseto resistor. please order resistor listed in service manual.
SONY	ALL VID	New video heads - all models	Trying to find a new set of video heads with good head balancein biii mode. more than 50 percent of new heads are not good. it usuallytakes about three pairs before one is sufficiently balanced.
SONY	KP7200	Audio output transistors	Audio output transistors get defective every couple of months.replacing the (q) board does not help.
SONY	D10	Noise on standing position or up-side-down position	A disc touches on a md cover when a unit plays on standingposition or up-side-down position. because the md chassis does not mountflat, the problem occurs in the unit with new improved insulators-springinside insulator.
SONY	CCDV8AFU	Dots on tape with outdoor shoot only	Leaves dots on tape like water spots on imager (outdoor only).problem also occured with unit serial no. 24500.
SONY	KP5000	Audio output transistors	Audio output transistors get defective every couple of months.replacing the (q) board does not help.
SONY	XR75	Two different tape heads available	Service manual shows p/n 1-543-181-00 head. actual part inunit was 1-543-181-12. is two (2) different heads used in differentseries? -hq comments: xr-75 has two different tape heads available. pleaseidentify the head type before ordering. we will is