Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV1954R | NO TURN OFF, REPLACE IC001 | Dealer noticed he could not turn off the set, which was ondisplay. None of the other functions worked either. After discussingwith the dealer I suspect failure was caused by static electricity. | ||
| Sony | KV1954R | NO AUDIO, REPLACE REG IC601 | No audio. | ||
| Sony | KV1953RS | BAD RECEPTION, REPLACE BAND SW IC002 | This unit did not have the proper band switching voltages.We found the input to IC002 correct but the output was incorrect. | ||
| Sony | KV1952RS | PICTURE DISTORTION, REPLACE IC003 | The frequency would change intermittently. You could freezeIC005 on MU board and then it would look up. Pin 4 of IC003 on MU boardhad an incorrect voltage. | ||
| Sony | KV1952RS | SNOWY PICTURE, C537 SHORTED | Snowy picture on all channels. Worse on low band. Found-30V line to be missing, i.e. 0V. | ||
| Sony | KV1952RS | SNOWY PICTURE, REPLACE IC005 | Snowy picture. No VC. This unit had output from the localoscillator but was not being divided down in the prescaler. There was nooutput at TP61. We found IC005 - prescaler/PLL IC to be defective. | ||
| Sony | KV1952R | DEAD, D601 OPEN | No B+ regulation. Found one rectifier in D601 opened (noresistance reading). | ||
| Sony | KV1948R | BRIGHTNESS CHANGE, CABLE SIGNAL PROBLEM | Going to or going from ch. 13, the brightness will change. | ||
| Sony | KV1947R | SNOWY PICTURE, REPLACE PLL IC005 | Unit does not tune - only snow. No pulse output from PLLchip IC005 into active filter. | ||
| Sony | KV1947R | INTERMITTENT COLOR, L342 | This set had intermittent color from date of purchase.Tapping on A board would cause color to come and go. Following colorsignal path with scope revealed the loss of color at output of L342.In checking this coil with ohmmeter, I verified that in fact, t | ||
| Sony | KV1946R | NO VERTICAL DEFLECTION, REPLACE C526 | No vertical sweep. There was no sign of a sync pulse atPin 19, IC501. DC voltage was OK at this point. Sync pulse was presentat Pin 21, IC501. Found C526 to be leaky. | ||
| Sony | KV1946R | POOR VERTICAL DEFLECTION, REPLACE C524 | This unit had only about 2 inches of vertical deflection. Wefound the voltage at Pin 13/IC501 to be very low (0.8V). Output from thedriver was also low. We found C524 to be leaky. This is an importantpart of the vertical sawtooth generator. | ||
| Sony | KV1945RS | NO PICTURE, REPLACED IC006 | Unit fails to tune or show any numeric display on fluorescenttube - just snow on screen. Servicer replaced microprocessor. Lines forreset constantly high, IC006 bad - actually labelled IC004 on that model. | ||
| Sony | KV1941R | HIGH FREQ. NOISE IN AUDIO AND VIDEO, REPLACED IC2101 | This unit had a high frequency noise in both the audio andvideo. The tuner was locked up and all the neons were lit. We trackedthe problem to a defective decoder IC in the remote. This was a veryunusual problem as the noise was present everywhere and | ||
| Sony | KV1743R | SHUT DOWN | This unit immediately went into HV shutdown. At first theproblem appeared to be a power supply/shutdown type of problem. Howeverby holding Pin 12/IC501 low with a power supply and running the AC up ona variac, it became apparent that the shutdown was b |