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Modelo - Chassis KV2647R
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| 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 | KV2647R | PICTURE DISTORTION, REPLACE C508 | Vert. foldover and decreased vert. deflection becausecapacitor (C508) failed. This same capacitor is also failing in othermodels and quite frequently. | ||
| Sony | KV2647R | S/M CORRECTION, VOLTAGE AT IC-302 AND IC301 | Pin 8 of IC302 and Pin 3 of IC301 show two different voltages,although they should show the same if they are directly connected, asshown on schematic. -HQ COMMENTS: Your are right. It should be the same (7.2V). | ||
| Sony | KV2647R | WHITE H LINES ON THE PICTURE, REPLACE Q001 | The picture had white horiz lines producing a venetian blindeffect. There was also a buzz of 7-8kHz in the sound. We found that theVC line was not being properly filtered. Found Q001 (FET) in the activefilter to be defective. | ||
| Sony | KV2647R | DARK PICTURE, SHORTED C725 | This unit had a dark picture and the picture control did verylittle. Found C725 shorted. | ||
| Sony | KV2647R | NO SIGNAL RECEPTION ON CHS 11 AND 13, REPLACE IC-002 | Could not tune in chs 11 and 13. All other channels OK. | ||
| Sony | KV2647R | SHUT DOWN, POWER MODULE | Power module causing high B+, shutting the set down. Uponreplacing power module, noticed non-linearity in the bottom half of thepicture. Top half of the picture was fine. | ||
| Sony | KV2647R | NO COLOR, REPLACE IC-501 | Picture was dark and also had loss of color. Scoping IC501Pin 15, horizontal sync pulse was only 6 VPP - should be 11VPP. I haveseen other sets that displayed intermittent dark picture or change of hueonly. All are related to IC501 sync output. The s | ||
| Sony | KV2647R | VERTICAL BARS ON THE SCREEN | This unit had several vertical bars on the left side. | ||
| Sony | KV2647R | MECHANICAL DAMAGE, Q601 LEAD | Leads of Q601 are breaking due to mechanical stress. Duringmanufacture, the leads are being stretched tightly before soldering.As the heat sink flexes during shipping, the leads break. | ||
| Sony | KV2647R | JAIL BARS ON THE SCREEN | This unit had very faint jail bars on the left side ofpicture. D250 zener voltage - 13.21 volts. 12 volt line - 12.61 volts. | ||
| Sony | KV2647RX | TOO MUCH RED INTENSITY, ADJ ACC RV303 | Excessive color intensity - too much RED. | ||
| Sony | KV2647R | NO MANUAL OPERATIONS, LEAKY D-2251 | Set could not be turned manually, remote functions OK. Ifpower relay was manually closed, the set would operate but the volume andpix would not adjust manually. Channels would change OK manually.I observed a large train of pulses on Pin 18, IC001. Ins | ||
| Sony | KV2647R | DARK PICTURE IN SCRAMBLED CABLE, CABLE BOX SIDE PROBLEM | When using a Jerrold model 400 addressable converter allscrambled cable channels were dark. Looking at the converter output on ascope indicated a wide sync pedestal than on standard reception and 1 or 2horiz lines early, when both cable output and broad |