Sony TV Repair: Common Faults and Solutions.

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Sony Repair Guide: Common Issues and Fixes

Brand	Model	Fault	Detailed Problem
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
SONY	TCK96R	Idler wheel	At end of tape unit will not auto reverse or shutoff. in thisunit the micro processor gets it's signal off the reel motor. at the endof the tape when take up reel was stopped at tend of tape the reel motorwas still dragging sending the pulse signals to
SONY	TCK96R	Part replacement needed	Auto shutoff and bi-directional playback is intermittent.
SONY	TCK35	Rough spot on fr limiter	In fwd or rew, when unit gets to end of tape, r1008 will gethot and twice r1008 opened for customer. found flywheel to be almoststopping drawing around 180ma.
SONY	TCK15	Modification needed	This deck produces short duration pops and snaps while playingtdk tape. (same tape works ok in other sony recorders.) -hq comments: please refer the attached s/b issued in sony canada and dothe same disposition. we will issue the s/b.
SONY	TCK1A	Defective capacitors	Complaint was no pb both channels, rec vol. ok. first stageof eq amp was cut off, second stage saturated.
SONY	HMK229	Main board not grounded	With the exception of a click in both speakers when unit isengaged, dial lamps and cassette motor running, the unit is dead.
SONY	TCM121	Bracket needs bending	No take-up in fwd play mode. the latch on the idler bracketsometimes doesn't go over the stub on the chassis but goes to the sideof it and jams there.