SONY TV Repair: Common Faults and Solutions.

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SONY Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
SONY	CFS55	Defective r308 and switch	B+ section of switch malfunctions either on tape or radio orboth at same time, also affects battery operation. r308 was also open.
SONY	CFS55	Defective lock plate	Buttons jammed up, lock plate too soft.
SONY	CFS45	Belt comes off	Tape would not move in any direction. found belt off motorpulley.
SONY	CFM31	Bridge on pcb	The only function that did not work was am.
SONY	CFM31	Lever breaks	Customer forces record lever down, forcing lever (a) againstlever (b) which breaks or shears lever (a) pivoting stud which is a partof sub-chassis. also this forces ff lever up breaking its guide postwhich is also a part of sub-chassis.
SONY	CF550	Incorrect sub-motor supplied	Original motor (8-834-009-01) requires 3 mounting holes whilesub-motor 8-834-009-10 needs 2. -hq comments: correct sub-motor number is x-354-931-41.
SONY	CF520	Motor will not run	R401 opens. motor will not run.
SONY	ALL AUD	Substitute transistor is incorrect	The substitute transistor for 2sd667, listed as 2sa768 onfisch card and in the computer is wrong. -hq comments: the only substitute is 2sd667a. this has been correctedin the 1988 substitution book.
SONY	ALL TVP	Replacement heads come without mounting screws	Replacement heads come without mounting screws.
SONY	ALL TVP	Servicing is dangerous	The entire inverter power supply is directly connected to theac line. when troubleshooting the power supply circuits, an isolationtransformer must be used.
SONY	TCK96R	Drive slider tab needed to be bent	Door was jammed. cass. transport locked up in play mode,consequently eject mode would not work. found 2 roller pins (p/n 3-558-448-00) had become misaligned.
SONY	STRV55	Defective capacitor	Interstation noise on am and fm. receiver will not scan orselect stations via memory presets. all segments of display tube lit up.
SONY	STR7800	Cleaning/replacing tuning capacitor	Extreme static on fm tuning knob is sensitive. over thephone it sounded like a poor ground (intermittent). the dealer is ina very humid area.
SONY	PSX40	Hall device/offset out of adjustment	After power was applied and start/stop button pressed, turn-table had a washing machine action.
SONY	CFM31	Shorted connection	The only function that did not work was am.
SONY	TFM7720W	Break in pcb	Sound is unclear.
SONY	TFM6060W	Cold solder connection on t7	No fm.
SONY	ICFC410W	Incorrect substitute transistors used	When radio is turned on either no sound or a buzzing sound isheard. i have found that q5, q6 and q11, which call for 2sc1363 tran-sistors have been replaced with 2sc1634 transistors which are notsubstitutes.
SONY	ICF9650	Broken pcb	Circuit board cracked at 3 out of 4 mounting posts. novisable damage on cabinet or packing material. problem previouslyreported on icf-9650 #159305. found identical problem on icf-9650#156863, and #196273. -hq comments: we will investigate this probl
SONY	TCM121	Bracket assy out of location	This unit would eat tape because take up reel would not turn.the bracket assy was allowed to travel backwards (pulling against thespring) until it went past the plastic guide on the chassis assy. onceit went past the guide, it could not come back forwar