TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	KV1925R	Volume increases and loss of mode control, replaced cp-102	After warm up, volume would increase to maximum: display wouldindicate maximum volume and remain on-screen. unable to change volume,channel, or anything else. if set unplugged, and then again powered up,default to (aux) antenna mode (this model does no
SONY	XR7150	Noisy mechanical section	If the mechanical section is noisy, check that, looking fromthe top, the rvs gear assembly (page 43, ref. no. 215) is behind the leafspring (part of mechanical chassis assembly no. 224). if it gets in frontof the leaf spring, all the functions will work
SONY	WMAF58	Poor fm reception	Unit will only receive the strongest fm stations. weakstations are muted, and border line stations will constantly mute in andout of mute.
SONY	KV2680R	Technical data does not assist with troubleshooting, ic-104	The following words were spelled as indicated. all otherdisplays were spelled correctly. sleep - slgep, muting - mutwng, aux -auxe, video - vidfo.
SONY	CCDV9	Microphone part number	Their is no part number for the microphone on page 178 of the service manual. -hq comments: part number for the microphone is 1-542-089-11.
SONY	CCDF70	Ejects half-way then reloads	Would eject half-way stop and reload.
SONY	CCDF35	No picture after a while	Picture began to get dim until no picture at all.
SONY	SLVP30HF	Distorted picture and sound	Severe distortion both sound and picture. audio sounded likespeed was too fast and picture had horizontal line resembling a picturewhich was severely out of horizontal sync. ic-651, pin 13 had videopresent but no video on pin 12. pin 10, ic-651 was 0v
SONY	CCDF35	Distorted video, no audio, no record	Distorted video, no audio, no record.
SONY	CCDF50	Lcd display inoperative	Could not set date/time or reset counter.
SONY	SLV70HF	Picture rolls and no color in playback	Picture rolls and no color in playback mode. traced problemto no sync from ic-701. found c-701 chip cap bad.
SONY	MDP200	Ld picture distorted and cd does not play	1. distorted ld picture. 2. cd does not play.
SONY	D25	Part number incorrect q-409	Part number of q-409 is incorrect. the correct part number is8-729-921-85. -hq comments: a service bulletin has been written and will be issuedshortly.
SONY	XR7050	Incorrect part	The part kcp sends is a chip component. the part needed isthe one shown on page 11, column 2, third down - 2sc3900. is the partnumber listed in the service manual correct or has the parts departmentsomehow mispackaged this part? -hq comments: the tran
SONY	CPD1390	Shutdown after warmup	Ohm meter check between hvr and gnd measures 100k - 120kΩ:too high. both part numbers above sub to 1-230-666-21, which normallymeasure 100kΩ or slightly less: ok.
SONY	CPD1303	Shutdown after warmup	Ohm meter check between hvr and gnd measures 100k - 120kΩ:too high. both part numbers above sub to 1-230-666-21, which normallymeasure 100kΩ or slightly less: ok.
SONY	SL340	Unit inoperative	Unit inoperative. we found regulator, ic-001, is power supplywith all leads internally open. this is the third time i have been shownan ic like this. i am sending sample for your investigation.
SONY	CCDF40	No servo lock	No servo lock. a strip or snow keeps running up the screen.
SONY	SLHF1000	No capstan rotation	Lost 5v at pin 14, ic-505 found c-817 shorted. found coldsolder joint on 5v path at the eyelet left side r-600.
SONY	CFSD20	Power transformer	Supplied transformer - same part number, does not fit drilledholes. drilling an additional hole for primary side allows new trans-former to work. -hq comments: i will check with tokyo and kansas city parts to see ifthe part has been changed.