Sony Repair Tips

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Results: 20072

Make	Model	Symptom	Problem
SONY	PS333	Defective pitch control	Neither 33 or 45 rpm would lock in. speed was excessive.voltage were correct.
SONY	PCMF1	Defective d102	Left channel was noisy - rec level control had minimal effecton noise - input signal was weak and distorted - line amp had some dcoffset at input to lpf - found constant current diode d102 breaking down.when testing this diode on a curve tracer using a 1
SONY	ICF9540W	Defective q1	This unit had poor sensitivity and distorted output in thefm mode. we found the rf amp to be defective.
SONY	CFM200	Missing part number	The p/n for the mechanism chassis is missing from the servicemanual. however, the chassis from the cfs-400 appears to be very similar,this chassis is p/n a-3102-043-a. are these two chassis the same?the part for the cfm-200 was researched by kc with ne
SONY	CDP101	Unit out of adjustment	Unit would skip on 2nd track and 5th track.
SONY	CDP101	Would not read toc	Would not read toc. i could hear something rattling insideunit when i took it out of the box. i found one screw inside that shouldhave been in the sled motor bracket. after correcting this, it still didnot read disc. output of ic403 (eye pattern) was
SONY	CDP101	Stuck objective lens/coil assembly	The disc would eject before the toc could be read. focusdc drive out of ic204 (tp 10) was correct, but the objective lens in thetop was not moving.
SONY	XR77	Defective ry301	The left channel would intermittently cut out on am/fmfunctions during first 5-10 minutes. this at first appeared to be causedby a defective semiconductor. further examination revealed relay 301 tobe the cause. heating and cooling the relay confirmed
SONY	XR77	Defective q105	The left channel fluctuated between distorted low output andno output. we found q105 (muting transistor) leaky.
SONY	XR70	Error in manual	Terminal marking for q303 as shown on pc board incorrect(emitter and base leads reversed.) the picture on page 6 of the servicemanual (supplement #1) is correct but it does not match the silk screenon the pc board.
SONY	WMD6	Pinch roller support needed bending	C-90 tape (tdk) would not run properly through capstan andpinch roller. problem existed only on tdk 90 minute tapes. hi freq.would drop out-left channel would decrease in volume. tape wrinkleevident at capstan. pinch roller and capstan replacement do
SONY	TCK777	Poor chassis ground connection	Low level hum in output.
SONY	TCK55	Defective relay	Right channel meter erratically pegs accompanied by loud hum.
SONY	TCK44	Q310 shorted	This unit had a squeal in the left channel, about 5 khz, itfirst appeared to be a ground problem but closer examination revealedg106/q206 muting transistors to be partially turned on.
SONY	TCFX500R	Bent tab on head chassis	Head deck would cycle up and down about 3 times after fwd button was pushed, then there would be a graunchy noise and deck would go into ff.
SONY	TCFX33	Tape transport too noisy	After using above 3 units for 6 months, customers complainedthat the tape transport is far too noisy to enjoy their units. noiseseems to be coming from the plastic gear mechanism. applying some greaseto gears seems to help but not enough to satisfy cus
SONY	TCFX33	No functions	No functions. checked and found supply reel table would notbudge. disassembled tape transport, cleaned and lubricated reel tablespindle (no part number in s/m).
SONY	TCFX7	Part number not in manual	Unit would operate 3 seconds then stop. pl802 was found tobe open. the service manual does not list a part number for the lamp.research thru kansas city located the part number to be 1-518-343-81.
SONY	TCFX4	Capstan and bearing not matched	This unit exhibited excessive wow/flutter at the beginning ofthe tape only. we found that the capstan and pinch roller were not matedcorrectly. changing flywheel and capstan bearing improved the situation.however we found it necessary to put a shim und
SONY	TAP7F	Defective ic101/102	This unit was locked in the tape position.

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