TV Repair: Common Faults and Solutions.

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Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	WMD6C	No record, right channel playback ok	No record, right channel playback was ok. waveform at bothhead leads showed virtually identical bias and audio waveforms. head waschanged. switched head wires. problem remained in same channel. finallykilled bias oscillator and looked at head input
SONY	STRVX550	No control of volume, bass, tremble and input switching	Volume was at one set level and would not change. displaywould change. also all inputs were being passed through the asp chip andswitching would not switch the asp chip. asp chip had been changed withno success. we had data circuit and strobe into ic
SONY	D15	(enter/remain) switch does not function	Enter/remain switch does not function. this problem has alsobeen verified in three other units with unrelated serial numbers.
SONY	KV20XBR	Set inoperable	Set was inoperable, i.e., no b+ from power supply. locatedshort in 200v line caused by c-703.
SONY	KPR41DS2	Shutdown, replaced green crt	Unit would go into shutdown when turned on. sleep light wouldcome on. found green picture tube shorting.
SONY	KV27HFR	Vertical instability and some horizontal flagging, c-520	Unit had vertical instability with either antenna or ext video(vcr playback). with an external video generator the unit was fine.reducing the gain of the generator unit would again have instability.checking the signal at ic-301 pin 47 and 48 found the s
SONY	STRAV450	Smelled hot, smoked	Customer complained that the unit smelled hot. r-666 hadoverdissipated and caused a hole in the circuit board. cause unknown.
SONY	KV27TX10	Squeal, install reactorless yoke, see sb tvp0114	Squeal sound.
SONY	CCDV9	No picture	No picture.
SONY	CDPC40	Non compatibility of some compact discs	Both models (cdp-c70 and cdp-c40) will not play track no. 1 onthe following warner bros./reprise cds:1. seals and crofts/greatest hits, wb3109-2 - sr005.2. gordon lightfoot/if you could read my mind, reprise 6392-2 -src01unit will play any other track on
SONY	CDPC70	Non campatibility of some compact discs	Both models (cdp-c70 and cdp-c40) will not play track no. 1 onthe following warner bros./reprise cds:1. seals and crofts/greatest hits, wb3109-2 - sr005.2. gordon lightfoot/if you could read my mind, reprise 6392-2 -src01unit will play any other track on
SONY	KV27TX20	Intermittent high pitch squeal, glue etc coil on yoke	Servicer states that out of the box set has intermittent high pitched squeal. he found that etc coil on dy yoke had broken loose from its glued down position.
SONY	SLV70HF	Drum assembly	Need correct part number for slv-70hf. when you enter thecomputer part number h-5436-143-h shows this to be drum assembly slv-50. -hq comments: the part number is correct. the description on the com-puter has been corrected.
SONY	KV25DXR	Unit was locked in service ready mode	Locked in service ready mode.
SONY	SLHF450	Unit shut down	Intermittently, unit would spill tape and shut off due toslack on tape. also serial number 21843.
SONY	SLHF450	Part no., pg. 127 of service manual (pc board retainer)	Need the part number for the plastic ring between the (r)board and the rotor assembly. -hq comments: the part number is 3-679-313-01. a service bulletin willbe issued shortly.
SONY	PCM601ESD	Unit has no output	Unit had no output. press record mute and output heard.found no output from ic-511 pin 4 to (d) flip-flop ic-512. gain of q-529was down.
SONY	CDP507ESD	Transit screw does not always lock	The sled assembly is not locked by the transit screw.
SONY	KV27DS1	Need sony badge p/n, 3-704-179-01	Need part number for sony badge (name plate). -hq comments: the part number is 3-704-179-01.
SONY	BCA80	Relay chatters/charge led flashes	We have had several units at the ssc with an open f1. thesymptom displayed is an intermittent flashing of the charge led and relaychatter. the unit may appear to have a bad connection because touchingvarious parts of the board sets up oscillations.