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Make	Model	Symptom	Problem
SONY	KV1743R	Repair board compatibility	Chassis #scc204a-a found change in m-2 board not reflected onprint. r025 exists in series with ic031. which print applies? are thereany other changes? -hq comments: r025 resistor's function is to fine tune rc constant forvc formation from pwm pulses.
SONY	KV1541R	Tuning drift, replaced d2007	After about 8 hours this set would start drifting on low band.servicer claimed that only ch. 2 and 3 would drift, rest of low band ok.upon further inspection i determined that what was actually occuring wasthat low band channels were switching into high
SONY	KV1222R	Dead	All six above sets were dead out of the carton. inspectionrevealed no b+ to receiver. i then noted the leads to r901 were bothbroken right at the terminals of the resistor. throwing out thepossibility of sabotage, it appears that the problem was cause
SONY	KV1207	No picture, see sb0200r	Found d064 leaky, this was replaced and 15 days later unitcame back and this time d063 was found to be leaky. ten days later unitcame back with d063 leaky again. each time the diode is replaced.
SONY	KV1206	Looses memory, replaced d514	This receiver had no memory. stations could be programmed,but would be lost as soon as channel was changed. inspection revealed thatic034/pin 7 was positive, -24v was missing. scope showed horiz. pulse on-24v line. further checking quickly revealed d51
SONY	KV1200U	Intermittent color distortion, replaced c342	Highly intermittent color-wrong colors-complete loss of color.drastic hue changes would occur faces would be all blue or all green.red would drop out completely, then chroma would degenerate into narrowrainbow lines, eventually resulting in absolute loss
SONY	KP5040	Parts availability	Please investigate if the drive cords for the electromotivearms may be available as a separate part for replacement instead ofreplacing the complete arm assy which is so expensive. refer to page 29of service manual. -hq comments: the pipe side end of d
SONY	FD210	Shifted picture, replaced yoke	Picture shifted up and slightly to the left.
SONY	XR77	Replacement of q801	The sound cuts off with a high level bass signal.
SONY	XO7	New ic used	The above unit uses upd1703c517 p/n 8-759-100-18. thispart is listed on page 35 of the preliminary service manual. the lasts/m printed list this ic on page 96 as upd1703c522 p/n 8-759-100-59.do they have the same program? if not please inform kc to st
SONY	WMD6	Defective fe coil	No control of speed, it is too fast on two stock units.
SONY	WM10	Careful reassembly required	The spring was out of the grove on the auto shut offmechanism. after placing spring in grove and reassembling unit, it wouldnot shut off at end of tape.
SONY	WM10	Shorted c805	No power. a short across battery terminals occur whencapacitor (c805) is bent down on the pc board or when the leads arepushed into the body.
SONY	WM10	Screw becomes loose	Screw on control plate block assy comes loose, touchingbottom side of flywheel.
SONY	WM10	Gear needs bending	This unit had no take-up. gear #364 was not low enough toengage gear #368.
SONY	WM7	Missing part number	The part number for the key switch board is not listed in the s/m.
SONY	WM7	Replacement part needs modification	Membrane circuit board requires modifying from form in whichit is received for proper installation and working in machine (cutting ofmembrane). -hq comments: the circular foil path in the upper most right corner ofmembrane needs to be cut.
SONY	TCK777	Defective r/p head	With music, poor low freq. response with audio sweep gen.,beat freq. from low end of response up to about 2khz only if sweep washigher than 12khz on the high end.
SONY	TCFX44	Defective c505	With the cassette door open and power applied, this deckwould go into play mode, although the play led was not lighted.
SONY	TCFX30	Belt slipping	The customer complained that he intermittently could notopen the cassette door. this was due to the head assembly not completelydisengaging. we found that the belt would occasionally slip on thecapstan during the disengagement process. the belt appear