Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV1923 | PICTURE DISTORTION (V) | Unit came in with 2 of vertical. We found C520 shorted andthis restored height but the linearity was poor. Found C529 to havechanged in value - evidently damaged. C520 must have tantalum replacementfor best results. | ||
| Sony | KV1922 | PICTURE DISTORTION (PIN) | Severe pincushioning and poor width. Q513 pin amp shorted andC810, IC546 to be dried up. After replacing these parts the pin and sizewere substantially improved. However during the first 5 minutes of opera-tion the left and right sides were pulled in | ||
| Sony | KV1910D | PICTURE DISTORTION (H) | Unit had severe horiz. foldover and would short the SG613 atfull voltage. The problem is very elusive to find. Have seen severallately. | ||
| Sony | KV1723D | DEAD | Servicer had replaced horiz. output SG613 and regulator2SC867A. Replaced again, also R556 in start ckt. Monitored voltage dropacross R807 - too much. Replaced C813 and C809. Set came on, however,now no G-Y from chroma demodulator. Checked waveforms | ||
| Sony | KV1722 | PICTURE BLANKING | This unit was in full blanking. The B+ regulator was workingfine. We found the 11V zener off the base of Q606 (EVP-1) to bedefective. The zener threshold was approx. 5V. | ||
| Sony | KV1515 | STATIC RELATED DAMAGE | This unit has now been repaired 3 times with static relateddamage to the tuner as the problem. A visit to the customer's homerevealed nothing out of the ordinary. We then carefully gift wrappedthe tuner cluster with 3M electric tape #1245 and grounded | ||
| Sony | KV1515 | DEFECTIVE VC DRIVE | We have found many units with defective VC drive transistors.The transistor generally fails within the first 30 days of operation.This is not a 2SC9450R 2SC1364 transistor. In fact I have not seen thisvariety in a Sony product. | ||
| Sony | KV1510 | PICTURE DISTORTION | This unit had bright bars at the left and right hand side -about 1 wide. The balance of the picture was close to normal althoughlacking detail. We found C532 to have opened up. This filters the B+ tothe video outputs. | ||
| Sony | KP5040 | MECHANICAL MIS-OPERATION, LUBRICATED PISTON ARMS | Mirror would jam in either the inward or outward movement ofthe mirror. There was a hue shift in the center of the screen. | ||
| Sony | KP5040 | CHANNEL DRIFT OFF STATION, REPLACED LEAKY C209 | After about 10 minutes, channel would drift off station.Found C209 had resistance. | ||
| Sony | KX2501 | BLANKING DISPLAY, REPLACED R472, SM ERROR R472 LABELED R453 | Unit displayed blanking problem. 2 wide bar on the left sideof the CRT. I could find no problem except base of Q401 was -1V (printcalls +0.3). I found R472 missing. | ||
| Sony | KX2501 | NO PICTURE CONTROL, REPLACED IC1302 | 1) RGB lines in the picture, red shaded area on the left sideof the screen which would change to green with the hue control. 2) Nocontrol of picture, volume control would cause picture to vary and at aset point on the volume setting the picture control | ||
| Sony | KX2501 | SHUT DOWN, REPLACED FLYBACK | Unit would shut down every one or two minutes after 2 hourswarm up. I could not find anything wrong, but read FDRs and noticedflyback could be cause. | ||
| Sony | KX2501 | SHUTDOWN, REPLACED H STAT BLOCK | H. V. shut down activates intermittently. | ||
| Sony | KV8100 | DEAD | No picture or sound when power was turned on. This symptomoccurred when unit was cold or after setting for several hours. |