Sony Repair Tips

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Results: 20100

Make	Model	Symptom	Problem
SONY	KV2649R	Poor picture, adj vhf agc	Poor picture on cable busy background.
SONY	KV2648R	No picture, replaced q502	No picture, high pitch squeal.
SONY	KV2648R	No picture, replaced fbt and q502	No high voltage. flyback shorted causing horiz. output tofail.
SONY	KV2648R	Horizontal bars on the screen, replaced prescaler and tuner	Horizontal bars on all channels.
SONY	KV2648R	Squeal from power board, replaced t602	Squeal from power board. pressing on f board changes pitchof squeal. when pushing on board directly beneath pot squeal stops.
SONY	KV2648R	No volume control, leaky q4025	The bar pattern would not extend across the screen.
SONY	KV2647R	Picture fade after time, resolder on "c" board	Video would begin to fade after 2 hours. wire to c board-12vdc to outputs had intermittent cold solder connection at trace next toc702, appeared to be thermal problem.
SONY	KV2647R	Convergence change in hot condition, replace yoke	After the set would warm up convergence would change. lowerright corner would start to misconverge and get worse the longer set wason.
SONY	KV2145R	Dead, fuse & damper diode	Unit came in with blown dc fuse and a shorted damper diodemounted on the conductor side of board, cathode connected to cathode ofd501 and anode to ground. this is a production mod. and no informationexists as to its type or part number. as it resembles
SONY	KV1922	Jail bars on left side	Jail bars on left side. servicer had replaced flyback andyoke - no help.
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

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