Dicas Reparação SONY
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV2647R | SNOWY PICTURE, REPLACE D012 | Unit displayed snow on all channels. Inspection revealed B+to Prescaler was about 5V DC instead of 6.8V DC. Zener diode in basecircuit of 6.8V regulator was defective. | ||
| Sony | KV2645R | SOUND DISTORTION | Two transformers were replaced the same week on two differentunits for excessive vibrations or singing. Wedging did not help. | ||
| Sony | KV2643R | NO TUNING, REPLACED C519 | No programming any channels on manual or auto. You could setthe stations appear on the screen but they would not be programmed in thememory. During auto program, the neons would not light up in sequence asthe set tuned through the bands, only channel 2 | ||
| Sony | KV2602 | INTERMITTENT SHUT DOWN, REPLACED CRACKED HVR BLOCK | This unit would intermittently shut down. The HVR block had acrack across the bottom. | ||
| Sony | KV1947R | NO TUNING MOST CHANNELS, RESISTOR CHANGE | KV-2649R will not tune most channels, only 5 and 6. KV-2647Rwill tune some of them, some sets will and some of same model will not. | ||
| Sony | KV1945RS | DEAD, D603G | Set will not turn on. | ||
| Sony | KV1941R | DEAD, REPLACED OPEN R812 | This TV was dead when servicer received it. Replacing theGCS, Q901, F602 and T801 restored both picture and sound. However, therewas severe ringing on the left side of raster. All sweep derived voltageslooked clean on scope. Further troubleshooting r | ||
| Sony | KV1922 | NO COLOR | No color, found no 3.58MHz output at CX172. Traced problemto capacitor C330 (leaky, reading 300 ohms). | ||
| Sony | KV1730R | DEAD | This unit lost all signal at the 3rd stage of the remotepre-amp. We found the capacitor in the tank circuit off the collector ofQ1103 to be shorted. | ||
| Sony | KV1546R | INTERMITTENT NO COLOR, REPLACED L304 | This unit was losing color intermittently. Servicer reportshe has had 2 other units with the same problem. | ||
| Sony | KV1511 | DARKER PICTURE ON THE LEFT SIDE OF THE SCREEN | This unit had a darker picture on the left side of the screen.The screen was divided almost down the middle with the right side normal.Scoping the 110V line revealed about 35Vpp of horiz. noise C528 was foundto be defective. | ||
| Sony | KV1222R | HUM NOISE IN THE SET | End user stated he could hear hum coming from the unit evenwhen the unit was turned off. Turned out that customer was hearing anarcing within the capacitor. Cap is across the AC line in (C601, 0.22uF). | ||
| Sony | KV1222R | THE DOOR WILL NOT STAY SHUT | The door will not stay shut. -HQ COMMENTS: The countermeasure to the above problem is given in theDecember 1982 FPR summary. | ||
| Sony | KP7225 | UNABLE BLUE HORIZONTAL CONVERGENCE, REPLACED Q5353 | Blue horizontal convergence control inoperative. | ||
| Sony | KP5040 | VERTICAL LINE IN THE CENTER OF THE SCREEN | Vertical line in the center of the screen from cross hatchgenerator. Lifted resistor's R3393 and R3384 and connected them to BA-9Pin 2. This method of getting RD of the vertical line is better thanjumping a capacitor across D3312. With the capacitor a |