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Make	Model	Symptom	Problem
SONY	STRVX6	Missing p/n in manual	A servicer had a unit with open diodes d901 and d902. thesediodes are the part of the resistor/diode network (cp001) in the pps.the p/n is not listed in the s/m. -hq comments: cp (composite parts) are not stocked. repairs are to bedone by replacing ba
SONY	PSFL9	Irregular guide bar	The unit preformed very well except that when the tone armreturned to the rest position it would vibrate during the last inch oftravel. we found the guide bar to be slightly irregular causing the tonearm to slightly bind and vibrate.
SONY	D5	Malfunctioning crystal oscillator	Only noise was heard in audio.
SONY	CDP400	Malfunctioning ic501	Noise in playback (ticking noise), different frequency ofnoise from different discs.
SONY	CDP400	Loose wire in cn22	Insert disc, runs fast for 15 sec. then ejects servo.circuits check out ok.
SONY	XRM10	No tape ejection	Motor would run at all times and tape was difficult orimpossible to eject. press-fitted pin becomes loose. therefore, themotor keeps running. -hq comments: new part has no notch, which presents the pin from becominloose. you can obtain one from rpc/t
SONY	TTS81	Missing instructions in manual	No instructions are given on how to set tracking force.
SONY	TCFX600	Relay not toggling properly	In playback, when going from dolby off to dolby c, unitbreaks into oscillation in both channels. when going from dolby b, todolby c, no problem. unsoldering either pin 2 or 8 of ic001 cures theopposite channel.
SONY	TCFX7	Incomplete instructions in manual	Page 22 of s/m, instructions for servo adjustment areincomplete. step 7 should refer to pin 21 of ic902 for pulse adjustment. -hq comments: as you pointed out, the tp (silk-screened as speed) isnot shown for the #7 in the adjustment procedures. the pi
SONY	TAN88B	Incompatible v-fets	Replaced v-fets with new ones and power supply fails. butwhen a set of v-fets from another unit are used, unit worked correctly.
SONY	STRVX550	Tape deck plugged into ac outlet on back malfunctions	Tape deck plugged into this unit stops/starts/rewinds etc.automatically and randomly upon power on/off activation. it is notedthis only happens when the speaker grounds are wired together or when unitis used with a speaker switch box that does not have
SONY	PSX75	Defective hall ic d601	The turntable motor did not turn although there was a kickpulse (current) through the motor coil.
SONY	PSX75	No stylus force	The tone arm did not go down and there was no stylus force.
SONY	MTL10	Detection sensitivity adjustment misadjusted	Unit would not line up properly to load the first cassette.
SONY	M100B	Tape jams	The unit jammed the tape intermittently. when it happened,the take up reel was not turning although the capstan and the pinchroller were turning fine.
SONY	ICF7750	Open foil trace	Sound was very low and distorted or there was no sound atall. we found an open foil associated with r41. the foil looked finebut was open. foil repair resolved the problem. although this appearsto be a straight forward repair, it stumped the technici
SONY	CRF320	Bad contact on ss-6 switch	The unit came in with very poor sensitivity in am, sw and lw.checked and found there was almost no local oscillator signal at thecenter tap of ift201 in the second mixer circuit.
SONY	CDP501ES	Missing ground path	At the end of each selection of music unit would go intopause, no matter what position switch s917 was in auto/pause.
SONY	XR75B	Jammed tape	Tape jams or unit will not take up tape. problem is withpart #318 on p51 s/m. roller bearing on right side of tray is bent andloading mechanism cannot move smoothly.
SONY	WMF10	No fm	Fm was not working. only white noise was heard. since therewas fm white noise, i suspected rf section was bad.