Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KP46S15 RA1 | Dead | Unit has an overheated standby transformer. The 20 volt source is running at 3 volts. | I had tech disconnect the connectors to the ""M"" board M CN653 on the ""G"" board. This removed the load on the 20 volt stand by and let the 12 volt stand by to rise to near 20 volts too. It is possible we have two regulators bad IC652 and IC001. IC001 may have been damaged by too much voltage on its input because of a defective IC652. OR there is a severe load on the output of IC001 the 5 volt standby on the ""M"" board where the 12 volt stand by enters on connector CN053 Pin 1 then to the IC001 a post 5 volt regulator. There is also a 1000 mfd @ 6.3 vdc on the output of the 5 volt post reg. Suggest the tech bring out both regulators and the capacitor C002 as a precaution. "" | Muller |
| Sony | KP46S15 RA1 | Dead | DEAD. Unit has leaking CRT's. Both red and blue CRT's are noticeably leaking with the green showing signs of moisture around the expansion chamber. | Unit will need replacement CRT and the convergence output IC's. | Muller |
| Sony | KP61XBR48 RA1 | Dead | KP61XBR48 Unit is dead. Q601 & Q602 are shorted along with R607 open. Preliminary checks of the secondary loads on this supply indicate no shorts circuits. Replacement of these devices again resulted in the instant failure of these transistors again. | Forcing the power supply on with artificial loads on the + & -135 vdc power supply allowed the supply to run correctly. High voltage was disabled by removing G4 connector. This disables the B+ to the High voltage output transistor Q801. It should be known this television has a High voltage output transistor and a Horizontal output transistor Q508. With the HV disabled we could check out the H. output stage with reduced B+ and current by placing a 40 watt light bulb in series with the -135 source. Al power up with the shutdown defeated, the bulb lit up brilliantly. This indicated too much current. A process of elimination indicated C514 was breaking down under operating voltages. The value was a .0068 @ 1.2KV. I physically measured .001 mfd. Replaced | Muller |
| Sony | KP61V25 RA1 | DEAD | KP61V25 serial 9001930 Dead | Unit has no high voltage. ""E"" board is wet from glycol coolant leak from the Red and Blue CRT's that are leaking Red an Blue tube "" | Muller |
| Sony | KP46S26 RA1 | dead | KP46S26 Serial 9003745. The set is completely dead | All three tubes are leaking. Coolant leaking on ""E"" board. "" | Muller |
| Sony | KP46S15 RA1 | dead | KP46S15. Unit has an over heated stand by transformer. The 20 volt source is running at 3 volts. | I had tech disconnect the connectors to the ""M"" board M CN653 on the ""G"" board. This removed the load on the 20 volt stand by and let the 12 volt stand by to rise to near 20 volts too. It is possible we have two regulators bad IC652 and IC001. IC001 may have been damaged by too much voltage on its input because of a defective IC652. OR there is a sever load on the output of IC001 the 5 volt standby on the ""M"" board where the 12 volt stand by enters on connector CN053 Pin 1 then to the IC001 a post 5 volt regulator. There is also a 1000 mfd @ 6.3 vdc on the output of the 5 volt post reg. Suggest the tech bring out both regulators and the capacitor C002 as a precaution. As a idea this board can be worked on outside of the "" | Muller |
| Sony | KP46S15 RA1 | Dead | KP46S15 serial 9013723 DEAD. Unit has leaking CRT's. Both red and blue CRT's are noticeably leaking with the green showing signs of moisture around the expansion chamber | Unit will need replacement CRT and the convergence output IC's. | Muller |
| Sony | KP41T25 RA1 | DEAD | KP41T25 serial 9006330 Unit is dead. | Further checking has discovered the ""E"" board has a large hole burned through the board caused by a coolant leak from one of the CRT "" | Muller |
| Sony | KP41T25 RA1 | DEAD | KP41T25 serial 9003158. Unit is dead. All three tubes are leaking. Unit has been leaking for quite a while. | The ""E"" board is heavily corroded and cannot be sufficiently cleaned. E module and all 3 CRT's must be replaced. "" | Muller |
| Sony | KP41T15 RA1 | DEAD | KP41T15. Unit has coolant leak which destroyed the ""E"" board. "" | Unit will need a replacement ""E"" board. "" | Muller |
| Sony | KP41T15 RA1 | DEAD | KP41T15 Unit is Dead. Was hit by a power surge D655 was defective. Unit still will not power up after the device was replaced | All power supplies are normal in operation Unit has Horizontal sweep when checking the Q505(C) we have over 900 v peak to peak . We do not have High voltage or high voltage drive to Q801(B) or Q810(B) find no horizontal drive. Checking the HV protection circuit finds the IC902(1) is sitting at 6.2 volts. This is because IC902(7) is higher than IC902(6). This is attached to the OCP circuit. It is conceivable the flyback is shorted on this due to the fact the 135 vdc OCP line is being triggered. Unit did have a | Muller |
| Sony | KP41T15 RA1 | DEAD | KP41T15 serial 9012082 Unit has a burned hole in the ""D"" around R1625, R1627, R1629, & R1621 "" | Board will need to be replaced. Hole is approximately 1 inch square hole under IC1601around the current limiting resistors. Board number is A-1346-296-A and is no longer available from Sony World parts center | Muller |
| Sony | KP46S25 RA1 | crt | KP46S25 serial# 9021406 all 3 CRT's leaked damaged to E-BOARD | Unit needs Blue CRT and attempt to clean the ""E"" board if possible "" | Muller |
| Sony | KP46S15 RA1 | CRT | Unit has leaking CRT. Unit has convergence. Both red and green CRT are leaking coolant. Damage is localized to just the CRT's. | Unit will need replacement red and green CRT's. | Muller |
| Sony | KP53XBR45 RA1 | CRT | KP53XBR45 serial 9032096. Unit has burned CRT's again. CRT were replaced in October of 1998 because of a bar burned across the face plate. Now the same bar is burned across the face plates of green and blue CRT's. This is caused by the stock market channel and or CNBC banner at the bottom of the screen | This customer was warned last year this would be a 1 time replacement for this symptom. They were warned that continuous display of a stationary image will burn any CRT especially a projection television. | Muller |