TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	KV1981R	Intermittent video and sound, replace t251	Intermittently the picture would turn white and the soundwould become noisy. this is in the tuner mode. also with no antennathere was no snow present.
SONY	KV2080R	Sound level too low, circuit change	Customers are complaining that the sound output level at thespeakers is too low.
SONY	KV2090R	Sound level too low, r842 value change	Customers are complaining about too low sound level at thespeaker.
SONY	KV2783R	Pop in sound, add reg circuit on "x" board	Pop in sound when changing channels and going thru non-activechannel or when scene changes from dark to bright. found 18v line voltagejumping.
SONY	KV1981R	Unit powers up but no sound/picture, replace v out ic501	The unit would power up but there was no sound or picture.also it was not possible to shut the set off with the front panel control.the problem looked like trouble with the upc. however, we noticed thatthere was no vert. pulse which is necessary for pro
SONY	CCDM8U	No drum servo lock - unit shuts down	Unit
SONY	CDP45	Incorrect p/n - loading chassis ass'y	Part number listed in manual is incorrect. this part numberis for the loading chassis ass'y used in the cdp-30. the mounting forthe loading motor is different in these units and the part received is notuseable in the cdp-45. i also checked the cdp-35
SONY	SLHFR70	Left side of display on all the time	Display segment for pause, sequence, recording, auto, and playare on all the time. this is the 11g section of display.
SONY	KP5000	Incorrect p/n for c5304 in s/m, correct p/n is 1-130-121-00	Part number listed for above capacitors shows 1-129-935-00.this part number is for a 500pf 1.5kv capacitor. the correct part numberfor the capacitors is 1-130-121-00. -hq comments: we sent the report to correct service manual.
SONY	CFS950	Detector block ass'y	When ordering p/n x-3322-501-1, it is subbed to p/nx-3322-540-1. kansas city has done this twice when ordering p/nx-3322-501-1. i would like to know if the sub part is compatible or hasto be modified. -hq comments: yes, the new detection block ass'y i
SONY	D7S	No audio output but tracks disc ok	No audio output, but unit tracks ok. pam output missing fromic301-17, but input good.
SONY	AVU270	No fm	Complaint of no fm, all other functions ok. found no supplyvoltage at fm rf amp. trouble was traced to excess lead length of l303which was touching the ground next to it.
SONY	APM615	Part number correction - front panel	Part numbers listed for item 12 in service manual areincorrect.
SONY	CCDV8AFU	No playback/no record	Was unable to get unit to record, playback or erase. checkedheads with sl-5151 head checker. all checked ok. checked record andplayback amps, worked fine.
SONY	CDXR7	Noise before selection is played when using ams	A brief blip of sound is heard immediately before a selec-tion, accessed with an ams key, is played. this also occurs occasionallyduring the initial play of a disc.
SONY	SLHFR70	Malfunction of reel motor and system control	Found f002 in p.s. section open. after replacement, ic401 onsa-10 board gets very hot. erratic reel motor operation. f002 gets openagain. also, found d210 (sa-10 board) open. gets hot after replacement,the other problems still exists intermittently.
SONY	CDP70	Intermittent skipping	Unit would skip tracks intermittently at random. tracedproblem to cold solder on m701 minus terminal. have seen several unitswith either + or - terminals cold soldered. since motor is assembled intoboard, this could be a problem on similar models also
SONY	CDP7F	No focus search	The unit would not focus search.
SONY	KV1952RS	Unit shuts down, replace d502	This unit would immediately shut down. we defeated the shut-down circuit by shorting the line from the hvr. then running the unit upon a variac we found ic501/pin 9 to be only 3.4v. the cause was a defec-tive d502.
SONY	KV1354R	Unit would not tune, replacedic-003	The unit would not tune in the stations. it was not possibleto change the output of ic001/pin 12 pwm out. the problem was caused by adefective pll controller/ic003. interestingly, the upc seemed to work inall other respects - display, etc.