Dicas Reparação
Modelo - Chassis KX2501
Pesquisa: KX2501 Enviar Dica Resolvida
Resultados 67
Pedir dica reparação
| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KX2501 | SHUT DOWN AFTER WARM UP, Q1520 | Unit would go into shut down after warm up. The shut down wastraced to the hold down circuit, where the horizontal osc. output wasdefeated. Inspection revealed a voltage being developed at collector ofQ1520. All other voltages and devices checked OK. | ||
| Sony | KX2501 | DOTS IN PICTURE, REPLACED CRT | With no input signal, even with the brightness and picturecontrols completely off the CRT exhibits about 12 white dots distributedin a random pattern over the entire face of the CRT. These dots willrandomly burst in a sort of fireworks pattern, dispersi | ||
| Sony | KX2501 | UNABLE TO CONTROL CONTRAST, REPLACED C1568 | Unable to control contrast. Using pix control found ABL #3transistor reading 3.8VDC, should be 25.2VDC, isolated problem to C1568.Capacitor was read 200 ohms. | ||
| Sony | KX2501 | NO PICTURE, REPLACED R761B | Lose video immediately after turn on. Traced video info. upto the base of Q704 and no further on C board. Voltage on collector ofQ713 was about 7V DC and it would not allow Q707 to conduct. ReplacingQ713 would allow video to be present about 20 second | ||
| Sony | KX2501 | DEAD, REPLACED D1206 | Dead. EVP-1 ckt OK, shutting down PPS. Replaced open R675,produced raster. Hooked up a VTX-1000R unit smoked and went dead. R675open again, Q1343 open, R02 burned. Replaced all parts. | ||
| Sony | KX2501 | NO POWER, REPLACED T652 | This unit had no drive to the converter output on GA board.We found the primary of T652 to be open. | ||
| 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 | KX2501 | PICTURE FADES OUT WHEN EXTERNAL AUDIO PLUGGED IN, D1206 | Picture fades out when external audio plugged in. R675 openon GA board, R02 burnt on U1 board, Q1343 and R1409 open on BD board.Replaced these parts. Video would fade out when audio plugged to eitherext. input or multi-connector, measured 8.5 to 9.1 VD | ||
| Sony | KX2501 | DEAD, REPLACED DIODE ON "K" BOARD | EVP-1 ckt operational, shutting down PPS. Replaced open R675.Unit produced raster. Hooked up a VTX-1000R. Unit smoked and went dead.R675 open again, Q1343 open, R02 on U-1 board burned. Replaced all parts.Unit again functional. However it was found | ||
| Sony | KX2501 | SHUT DOWN, REPLACED Q652 ON "GA" BOARD | Either horiz. scan comes up and goes immediately to horiz.shutdown or does not come on at all. Voltage on Q108 relay drive base lowand relay will not activate when transistor completely shorted prior togoing bad would come up and shutdown within 3 secon | ||
| Sony | KX2501 | DEAD, REPLACED Q651 AND Q653 | Unit came in with Q652 shorted and seven amp fuse blown.Found that excessive current drawn beyond 65V AC when variable inputtransformer turned up. This was with B+ unloaded from power circuit.Individual measurement of power supply components showed both | ||
| Sony | KX2501 | LINES ACROSS SCREEN TOP AND BOTTOM, NORMAL (SUPPORT WIRE) | When viewing monitor with no video there are faint whitevertical lines across the screen. This appears to be horiz. pulsespossibly from the scan derived B+ voltages. Customer noticed these whilerecording with camera and became very critical. He insist |