Dicas Reparação
Modelo - Chassis KV25XBR
Pesquisa: KV25XBR Enviar Dica Resolvida
Resultados 95
Pedir dica reparação
| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV25XBR | SCHEMATIC ERROR REGARDING V-PULSE | From connector A-2 pin 3 on the V-pulse does not correctlyfind its way to IC-103/pin 4. After being inverted at Q-127, its showngoing to IC-103 pin 15, FM trap pin 4 is shown tied to power switch line. -HQ COMMENTS: Thank you very much for your report. | ||
| Sony | KV25XBR | MISTAKE IN SERVICE MANUAL | Missing line in service manual on (D) board. -HQ COMMENTS: The line is missing connecting T-601/primary (downside) tojoint point of RL-601/C621. A service bulletin will be issued on this. | ||
| Sony | KV25XBR | NO SOUND OR SOUND CRACKING | No sound or sound cracking on some channels. | ||
| Sony | KV25XBR | CHANGING CHANNEL BY ITSELF | Intermittent operation of customer controls due to warpedbezel. Second set with this problem one on pedestal base. | ||
| Sony | KV25XBR | INTERMITTENT VOLUME GOES HIGH | Trouble symptom was very intermittent, i.e., volume would govery high, brightness level would decrease about 2/3 and no display. In-spection reealed no DC voltage at IC-101 when problem occured. I foundrosin connection on L-113 which prevented DC from | ||
| Sony | KV25XBR | SCREEN HALF DARK | The left side of the screen was lighter than the right. Also,the video was smeared. We found the problem to be caused by C1658-it hasopened up. This capacitor filters the B+ to the RGB drivers. Replacementresolved the problem. -HQ COMMENTS: C1658 is | ||
| Sony | KV25XBR | VIDEO BLANKED OUT | By doing a voltage analysis on the D board, I was able totrace to Q1504 - E2.4, B.4, C.12.9, Q1506, E2.4, C.2.4, B.2.4 checkedtransistors they were ok. Checked surrounding components R1537 Changedvalue. | ||
| Sony | KV25XBR | HUM IN AUDIO WITH SUPER IMPOSED VIDEO | When writing appears on existing picture, it's hums loudly. | ||
| Sony | KV25XBR | RETRACE LINES | The unit operated fine except that on some NBC programs therewould be a 2 to 3 retrace lines on the top of the screen. All othernetworks/channels worked fine and it was only certain programs that wereaffected on NBC (ie, Price is Right, sections of even | ||
| Sony | KV25XBR | ERRATIC POWER ON FUNCTION | The unit would turn on after pushing power switch severaltimes manually or remote. Found R653/R660 on GA board increased to1 meg ohms. These are carbon resistors. | ||
| Sony | KV25XBR | NO PICTURE - SLEEP LIGHT ON | These three units had a mass failure of the velocitymodulation circuit. D1651 shorted and opened the resistors and shortedthe transistors. The C board had dark spots on it around the resistors.The symptoms on these units were only sleep light on with n | ||
| Sony | KV25XBR | OUT OF VERTICAL SYNC | Out of vertical sync - w/no color and raster is dark. | ||
| Sony | KV25XBR | CONNECTING CORD TO PC | Customer has a KV-25XBR monitor and a JBM-5140 Laptopcomputer. He says computer has a 10 pin output. Do we make a connectingcord that he can use? | ||
| Sony | KV25XBR | PULSATING PICTURE | Picture would pulsate at 1/2 sec rate. | ||
| Sony | KV25XBR | LINE IN PICTURE | 1/2 black line down left side of pix. C1657 apparentlyopening up. We have seen this cap bad on 3 sets. This repair was thesecond time cap had failed on this set. |