TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	SLHF400	Audio noise in beta hifi	Checked s/n at 400hz, was -68db. checked distortion at 400hz,1khz, 5khz and 10khz all read less than 2 1/2%. but a buzzing noise isheard also sounds like pumping. buzz can be heard on movie blue thunderwhen he sets his watch. also noticed buzzing on
SONY	MDRE248	Need p/n for earphone cord only	Need part number for earphone cord only. -hq comments: in order to get the cord you must order p/n x-2386-407-1which is connector item #3 in service manual.
SONY	XR66	No am	The unit had intermittent am operation. we found the 8v bussto the tuner to be loading down. the problem was caused by a defectivec516/47uf @ 10v.
SONY	SLHF400	No audio	No sound.
SONY	TCFX410R	Tension spring	Need head tension spring p/n 3-319-634-01 for tc-fx410r.kc shows none in stock or available. -hq comments: one piece of p/n 3-319-634-01 is being sent to you.
SONY	KV1311CR	No audio on tv, replaced ic-881	No audio in tv mode. checked ic-881/pin 2, audio signalpresent. but ic-881/pin 1 no audio signal.
SONY	STRAV230	Low volume ac hum in output	Low volume ac hum in output.
SONY	XR740	Continuous auto reverse	Unit would auto reverse continuously.
SONY	MDRA25	No part number for divergence cord	Mdr a25 is a repairable unit, however no part number fordivergence cord. -hq comments: the cord is part of the headband assembly. it comes asone piece.
SONY	XR780	Part number missing	Protector (p/n 3-323-287-01) not called out on prints. also,many breaking. suggest fingers be made stronger. -hq comments: a service bulletin has just gone out regarding thisproblem. we will notify tokyo of breakage.
SONY	CCDV8AFU	Distorted pb picture due to drum/capstan problem	This unit had a problem where the drum and capstan motorswould run uncontrollably for 4-5 sec then the unit would shut down andonly eject would work. i found q508 open. this caused ic501 to get veryhot only in play mode.
SONY	KV1210U	Sub fbt	This sub fbt has instructions for installation but they are in japanese. i have a servicer that needs these instructions as soon as possible. -hq comments: we will publish service bulletin on this.
SONY	XR75	Missing part numbers	Need part numbers for spacers where they are located in 7iin supplement #1. -hq comments: see supplement no. 1 published in march 1984, spacers areitems #347 and #348 p/n 3-592-651-00 and 3-592-652-00.
SONY	XR780	Service manual errata	Service manual errata. s701, s702, s703 are incorrectlyidentified on page 41 of both manuals. s701 is tape direction switch.s702 is tape-in switch. s703 is tape-out switch. all are located on themd board. -hq comments: a service bulletin will be iss
SONY	KV1365	Unit dead, replaced t503 and fuse	Unit dead, f602 was opened due to t503 being shorted.
SONY	KV2601	No audio, replaced ic2001	No sound.
SONY	CFD5	Wrong part numbers	Wrong part and p/n missing. parts list reference 395 shouldbe 305. ref 395 p/n 7-627-556-38 butt 2.6 x 4 (s). -hq comments: a s/b will be issued.
SONY	CFS400	Sound was distorted on playback due to slow speed	With old drive motor the speed was different when themachine was working on battery, and on ac (-5% on batt and -2% on ac).with the new drive motor the speed is the same but it is lower thanspecs (-45%) using a d pulley. -hq comments: please replace the
SONY	KV1557R	Snowy picture	Snowy picture.
SONY	PTB100	Part number for light bulb	Please inform of p/n for pattern box light bulb. -hq comments: p/n is j-602-049-03. this can be found in pattern box s/m (p/n *ptb-100).