TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	KV1910	Hv block	Model kv-1910 uses hv block 1-453-046-00. according to micro-fische, it has been subbed to 1-453-070-00. both are not physicallyinterchangeable and it is impossible to use original parts from old assy.can hv block 1-453-062-91 be used? -hq comments: 1
SONY	KV1915	Audio out	No audio or intermittent audio on certain stations. manymodels (kv-1913/1914/1916/1917/1918) have the same circuit.
SONY	KP4600B	Picture would gradually collapse to a horizontal line	After several hours of playing, picture would graduallycollapse to a horizontal line.
SONY	KV5100	Picture tube failure	New picture tube installed, then unit went dead. every timeconverter output transistor failed. fail within a couple of hours.servicer convinced problem not in power supply. proved dc operation ok.problem found to be dried out filtersand coupler capaci
SONY	KV2145R	Foldover at the top of the picture, r520 decreased in value	After warm-up, pix would start to pull down with slight fold-over at top of pix and r520 decreased to 7.8kΩ.
SONY	KV2670R	Unusual loss of vertical synchronization, ppu1a freq synth u	Random intermittent loss of video info. and vert. sync whichmay occur on any channel at any time. pix/signal quality also appearedweak on a random intermittent basis.
SONY	CTV	Distorted pix	When hooked up to cable there is a vert. bar approx. 1/3 ofway in along with ghosts of varying severity on ch. 4 & 6. a new broad-cast tower for these stations went into operation and has progressivelygotten worse. it is caused by ingress of the broadc
SONY	PSLX310	Tracking problem	The unit would not track properly using a grado mf3 cartridge.we found the turntable to be working fine but incompatible with thiscartridge.
SONY	PSLX510	Won't play all 45's	The tone arm would move in about two inches and then go backto the rest position. the diameter seemed ok but no warp. there was aslight taper at the edge. we resolved the problem by remounting thedetector diode so that it pointed at a 45 degree angle
SONY	CDP101	Hiss on one channel, other channel dead	Left channel sound was fuzzy and covered with a lot of hiss.right channel was dead. pin 18 of ic507 (d/a conv) looked fairly clean.pin 17 (r-out) had a lot of noise on it. power supply of q505 had some noise,not present at power supply of q504. resistance readin
SONY	MLV1100	Non-switchable of the line in signal at line out	When using line out to connect to amplifier or cass deck, the customer cannot get line in signal. he always gets mpx in signal.
SONY	STRVX250	No memory	No memory. the segment of the fl display go off unevenly.the voltage at pin 42 of ic301 is as low as 1.5v instead of 2.4v.
SONY	PSX800	Tone arm malfunctioning horizontally	The tonearm did not center itself when it is up position.therefore the tonearm slide inward or outward becasue of the angle error.
SONY	CDP701ES	Noise in r ch	R-ch sounded very noisy. sounded like ju-ju.
SONY	CRF320	Sound is low intermittently	When turning on the power switch with the timer function, thesound is very low.
SONY	WA55	No fm	Am worked fine but could not switch to fm.
SONY	CFSF11	Hum noise with ac-190	When using the ac adaptor ac-190, a slight hum noise is heardthrough the headphone in the play mode, even when the volume control isminimum.
SONY	TCD5M	No play	There was no function, because the motor did not turn.
SONY	M7	Hook-up confusion	Wiring diagram on page 16 of service manual can be confusingwhen replacing mike.
SONY	CFS3000	Wrong rear cabinet	When rear cabinet is ordered by 3-319-547-01, part receivedwill not fit unit. the part, we need says made in korea on rear,whereas the part we are receiving says made in japan. could you supplyus with the correct part number for the rear cabinet of the