TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	PSX600	High pitched squeal	High pitched squeal from output when arm moves laterally. ifarm is damped by hand, oscillation disappears.
SONY	KV1922	Tuning drifts	Tuning drifts. no problem if substitute vc supplied from10vz power supply.
SONY	STRV55	Hum in both channels low volume in left	The unit had a hum in both channels that would disappear assoon as a scope probe ground connection was made. also there was lowvolume on the left channel - all modes. we found the problem to becaused by crystaline growth on ic601 and c603. we cleaned
SONY	CCDV110	Picture flutter under certain lighting	The vtr works fine. however, when the camera has the upper1/3 in bright light and the lower 2/3 is relatively dark there is anoticeable flutter in the playback picture. this is not seen in the evf.we have gone through the iris and agc adjustments with
SONY	G1500	Turntable does not work - arm will not cycle	Arm will not cycle on turn table.arm slide (ref. 473) pin jumps out of cam gear (ref. 460) track.
SONY	G1500	Tape deck inoperative	Roller pops out of the pinch roller assembly.
SONY	KPR4620	Inverted image, see service bulletin # 302	Customer complained about an inverted image on bottom lefthand side. this is only noticed when the room is very dark and thepicture has a dark screen.
SONY	CDP701ES	Noise during scan	Clicking noise is heard when scanning to the next selection.all power supply filter capacitors have been changed, also the regulatorics (+/-12v, +/-5v). no change. found out that this noise did not appearuntil the stk6922 were replaced with bx1201.
SONY	KV25XBR	Vertical jitter	Vertical jitter on satellite and prerecorded copy guardedtapes.
SONY	CCDV110	Scrambled image	This unit had a scrambled image in the view finder andrecorded on the tape. it appeared as though, the horizontal was offfrequency, because of the horizontal lines in the picture.
SONY	CCDV3	No eject	Unit would not go into the eject mode.
SONY	KV25XBR	No manual control of volume	No manual control of volume, channel change. no data presenton common buss to these switches and pin 11, ic1301. this line measured200Ω to ground.
SONY	CCDV8AFU	Tape jam	Found brand new maxell tape in machine would not eject. unitsunable to load up. load ring begins to bring tape around drum but hasinsufficient tape to complete cycle. -hq comments: when there is insufficient leader tape threading ring willretract to u
SONY	WMF80	Ribbon cable connector part #	Need the part # for the connector on the main board whichfastens the ribbon cable from the equalizer board. if opened, thisconnector will not hold tightly enough when re-fastened. -hq comments: part number is 1-563-364-11. please order from kcp.
SONY	EVS700U	Intermittent operation	Unit would play for approx. 1/2 of a tape (90 min) and shutdown. if tape was ejected and reinserted unit would run for approx.10 min, then shut down again. it appeared to have faulty reel rotationdetectors. further inspection revealed that take-up ree
SONY	CCDG5	Imager is not available	P/n of imager subs to 9-910-999-38 (see tech info). -hq comments: this part is not available separately, but is includedwith the complete cd board (a-7575-012-a).
SONY	SL100	Won't record video	Won't record video, audio record and audio/video pb ok.
SONY	CCDV110	Vert roll in viewfinder	Viewfinder had vertical roll from camera input only. founddistorted sync signal at pin 47 of ic703 on cp-18 board. sync input atpin 3 of ic703 on cp-18 board checked normal. replaced ic703 on cp-18board, problem resolved.
SONY	CCDV8AFU	P/n for ef-2 board cable	Needs p/n for cable (ev-1) attached to ef-2 board (see page149, ref. no. 128). -hq comments: this cable is not available from tokyo. please remove onefrom a scrap unit or wire directly from ef-2 to me-1 board.
SONY	EVS700U	No pcm operation when unit gets hot	When hot unit does not function on pcm, does not shut off,does not have any function at all, different lights like ff goes on/offarrows on pcm tracks stays on.