Sony Repair Tips

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Make	Model	Symptom	Problem
SONY	KV2649R	Lose color, replace x001	When unit was turned off/on color would lock in. turn off/onagain and you would lose color and the channels would not change.
SONY	KV2648R	Intermittent picture shrink, replaced ic601	Picture shrinks intermittently. stations shift when pictureshrinks.
SONY	KV2648R	Dead set, replace r570 and h out	After about 15 min. horizontal output transistor (2sd957a)would short out. during the first 15 min. transistor would increase intemperature. found r570 was reading less than 0.2Ω - should be 0.22Ω - was able to put in a 0.23Ω and everything rem
SONY	KV2647RX	Jail bars on the screen, changed d250	This unit had faint jail bars on left side of picture.
SONY	KV2647R	Audio buzz on scrambled stations, adj t204/205 sif	Audio buzz on scrambled stations only. the following stationsexhibited the problem: hbo (ch. 30), showtime (ch. 34) and cinemax(ch. 38). they use jerrold box (new england cablevision cable co).
SONY	KV2602	Audio buzz on scrambled stations, adj sif t204 and t205	Audio buzz on scrambled stations only (hbo & cinemax).
SONY	KV2145R	Pic folds over at top, r520 decreased in value	Unit had 1/2 inch of fold over top of screen. found r520reading 8.1k (should be 10k), upsetting bias on vertical outputs.
SONY	KV2145R	Relay chattering, resolder d602	Power relay rl001 would not stay engaged when power on buttonwas depressed. the new mf board didn't cure the chattering relay problem.
SONY	KV1953RS	Dark picture, replace c548	Dark picture, sometimes blowing fuse and regulator. fivecases have come to our attention of this problem, which is caused by c548being shorted or leaky. attached are samples for evaluation.
SONY	KV1952RX	Dark picture, replace c530 and r538	Dark picture gave impression of insufficient high voltage.in addition the red convergence was off slightly (like h. stat controlslightly misadjusted).
SONY	KV1948R	Picture distortion, c654 open	Insufficient width and height, low 135v at l651.
SONY	KV1916	Immediate shut down	On turn on, unit would immediately shut down. found r528opened.
SONY	KV1911	Severe pin cushion	Severe pin cushion, pulled in 2-3 inches on each side.checking 15 volt line found a negative h pulse on the line. found c810to be open.
SONY	KV1747R	Sets will not lock on cable channels	Set will not lock on cable channels. usually the 47 modelsand models with a similar chassis. i tried reducing the value of c208but this made the problem worse. we tried increasing the values of thiscap and found that the sets would perform properly wi
SONY	KV1747R	Channel lock	When changing channels, up/down with remote, unit would lockon channel 8 for approx. 8 to 10 seconds. unit would scan up/down allother channels with no problem.
SONY	KV1547R	Picture blanks	Set would play 15 mins., then would start blanking in and out.vertical would then start shrinking and soon would collapse.
SONY	KV1520R	No volume control	This unit had no volume up. we found d1117 to be ever soslightly leaky.
SONY	KV1355R	Unit goes shut down mode, crack on board	Any movement of cabinet would cause the set to go intoshutdown mode. i defeated the input to the shutdown circuit, pin 17 ofic501 to prevent shutdown in order to isolate the problem. the voltageat pin 16 of ic501 would increase when the problem occurre
SONY	KV1221R	Intermittent turn off, replaced ic001	This unit would intermittently turn off. we found the remotedecoder ic (ic001) to be thermally sensitive.
SONY	KP5040	Noise bar in the center of othe screen, connection change	A vertical bar appeared in the center of the picture whenviewing a normal program. investigation of the circuit revealed that thelot transformer pulse seen at pin 1, of t504 on the e board wasdisplaced from its normal in phase relationship to the flybac

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