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Make	Model	Symptom	Problem
SONY	TCFX7	Excessive wow and flutter plus motor noise	Motor comes with plastic clutch, which in time will comeflush against motor bearing, causing a grinding noise and wow and flutter.one solution is to put a small plastic washer at clutch shaft assy tostop it from going inwards against motor bearing. -hq
SONY	SRF5	Intermittent audio - how to service	When the plastic interconnecting strip is removed, you cannothear audio (because the audio-tuner parts are separated). what is therecommended troubleshooting procedure? -hq comments: 1) complete b+ and ground connections for the tuner asoutlined on pag
SONY	SPP11	No voice signal through the handset speaker	The hand unit and the base unit communicate with each otheras indicated by an operational key pad and dial tone, but there was novoice through the speaker. found c53 (0.047uf) was shorted inside.replaced it.
SONY	PSX55	Part number - det sw contact slider	A servicer tried to order the contact slider. since the partnumber is not listed in the service manual, he thought it is included inthe cam control (#4-869-957-00) and he ordered it. but the contact sliderdid not come with it.
SONY	PSLX55	Erratic movement of tone arm	The tonearm on this unit would cue into the record at afaster pace than it would cue in the outward direction. glue on the pcboard has erroded and was responsible for changing the dc level on pin 1of ic202. a resultant -2.5 vdc was present at ic202's o
SONY	XR50	Cassette ejected soon after loaded	Cassette ejected soon after loading. the dm-101a(p/n 8-745-101-01) dme had failed along with q602 (voltage reg) and d602(voltage ref). -hq comments: the output of my sample dme is a sine wave of 0.1vaccontaining a 3.6vdc component. its output is a pro
SONY	TC48	Part number for gear (c)	I need p/n for gear (c) on page 14 of service manual. -hq comments: gear c shown in the exploded view is part of the flywheelassembly. it is press fitted onto its shaft, and cemented. recently,however, this gear has been made available as p/n 3-550-02
SONY	STRVX550	Music stops and noise occurs	Unit would play on fm and intermittently go to noise. displaywould remain unchanged and tune light stayed lit. i found taping on powersupply caused problem to come and go. found the ground connection to bethe problem on that main board. put in a star
SONY	PSX800	Incorrect part number - d606	Incorrect p/n listed for 20v zener d606 on page 54 ofmanual. p/n listed 8-719-990-03 should be 8-719-910-03.
SONY	PSLX5	Incorrect set - down point	When a 12 record is placed on turntable, tonearm goes to7 position. replaced q209 with new type transistor 2sa1027r, as pers/b #155. this transistor insures pull in of the size solenoid.
SONY	PSLX1	Part number - cartridge wires	The technician could not find the parts numbers of thecartridge wires. -hq comments: although the parts numbers are listed in the s/m(#512 1-555-828-00 white #513 1-555-829-00 red), they are notindicated in the exploded diagram on p17.
SONY	CF420	Mechanism shuts off	The mechanism shuts off in any mode before tape ends. forsome reason, the shut-off safety plate did not engage the brake lever.put it back on the brake lever.
SONY	CDP101	Part number - lpf	Ordered lpf-f501/f502 (p/n 1-464-273-00) and received lpfboard for betamax (or perhaps tv) with antenna terminals. -hq comments: this part number from the service manual supplement isvalid for late production cdp-101s. kcp stock is being investigated a
SONY	XR65	Open trace	Foil open on volume control board. this foil appears to haveburned open.
SONY	XR50	Solenoid drive transistor	Cass. will manually eject, but not automatically at end oftape play.
SONY	XR45	Voltage errors in manual	Many voltages in the power supply seem to be in error andneed clarification. voltage difference exists on the same foil conductor. -hq comments: a list is provided below of the key voltages: please makea note of these voltages in your xr-45 s/m also.q
SONY	WMF10	Motor noise	Servicer has had several complaints of motor noise throughhead phones. this problem does not show up on wm-10 but only on wm-f10. -hq comments: electrical motor noise occurs when the b+ line is furthertaxed by: 1) loaded motor 2) decayed battery 3) l
SONY	WMF1	Open rv-1	When receiving stereo fm signals the sound was distorted.we found rv-1 to be open - vco adjust.
SONY	WM10	Loose spring	Small hair spring that sets in plastic groove of auto shutoff part of pinch roller comes out of groove and unit will not start toplay auto shut off taken over.
SONY	TCK555	Defective ic202	Unit would go into rec mode, however reel tables would notturn and it would eat tapes. found that b+ (10v) to board was low.isolated problem to shorted ic202.