Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV35V36 AA-2 | Shut down | KV35V36 serial 9024090 Unit has an intermittent shut down that only occurs after two or three days. When shut down occurs, the LED in front is Blinking and raster disappears but sound is OK. When flexing, heating, or freezing the main circuit board the problem can never be recreated. | Tech needs to order the CRT. Since we are not able to confirm any trouble with chassis The CRT is nearly out of Warranty. It is recommended that since we are unable to determine any chassis fault the problem must be due to CRT arc over. Note after 4 weeks of normal operation the CRT seems to have corrected the symptom. | Muller |
| Sony | KV32S65 AA-2 | shut down | KV32S65 intermittently the set will turn off. This process takes about 30 ~ 60 minutes. The set can be turned back on again if the power button is pressed twice. Sometimes the set comes on in the Video 1 input mode when it was in the tuner mode before it shut down. | This could be caused by the CRT. Suggest the tech disconnect the CRT socket an run the set with the tube disconnected and see if the set shuts down with the CRT disconnected. With the tube disconnected the chassis ran 3 days without shutting down. A CRT was substituted and the problem never showed up on the other CRT. Replaced the CRT and it corrected the symptom. | Muller |
| Sony | KV32S25 AA-2 | shut down | KV32S25 Unit will not develop high voltage. When the set is turned on no high voltage appears. The set has sound and has a flashing light on the front indicating the set is still in a stand by mode waiting for IK pulse feed back acknowledgement from the jungle IC | When monitoring the Horizontal output collector we found the 140 dropped slightly at turn on. But the Horizontal driver Q501(C) dropped to 85 and back up to 140. I had the tech to remove the horizontal output transistor and try starting up the set again. After power up measure the Q501(C) horizontal driver transistor. It should be about 85 volts and stayed. This told us we were looking at a shutdown symptom. Checking all secondaries we found nothing shorted. Replaced flyback which corrected trouble. | Muller |
| Sony | KV32S40 AA-2 | shading | KV32S40 Brightness shading in brighter on the right side than it is on the left side of the screen. Symptom only shows up in the tuner mode. VCR in video input mode is fine. Unit has CATV box ""Scientific Atlantic model 8580338"". "" | After checking out the box and moving the box it was discovered the movement of the box effected the screen brightness. The box was mounted directly beneath the television. If the box was moved to the far left the symptom disappeared. If centered below the TV the symptom was evident. Solution was to move the CATV box away from the television and remove any electromagnetic interference caused by the television. | Muller |
| Sony | KV27V40 AA-2 | retrace lines | Sony KV27V20 has retrace lines no video. Unit will shut down if left on after the filaments warm up. | Missing 200 volt source from flyback to CRT driver board. Trace broken at CN1781 | Muller |
| Sony | KV27S25 AA-2 | retrace lines | Sony KV27S25 Bright screen with retrace then unit shuts down | I had tech measure the 200vdc supply line and it measured only 78 volts. Unit had defective capacitor in the 200 vdc source. | Muller |
| Sony | KV32V25 AA-2 | retrace lines | KV32V25 serial 7019547. Unit has bright screen with retrace lines then shuts down. | Measuring the 200 volt B+ at the CRT socket we found the voltage to be under 126 vdc. This indicated the 200 volt source was not running. I had the tech check R553 a .47 ohm 1/2 watt resistor and it was open. Replaced the resistor and the set operated normally | Muller |
| Sony | KV32S26 AA-2 | retrace lines | KV32S26. Unit has bright screen with retrace lines | Unit has the 200 vdc cathode source voltage measures 179 vdc but when measuring on the cathode directly the voltage is very low 22 vdc. Disconnecting the socket causes the voltage to rise back to 198 vdc. Unit has a defective CRT. | Muller |
| Sony | KV32S26 AA-2 | RETRACE LINES | KV32S26 Unit will go to as bright screen with retrace lines then shut down. | When the set shuts down. All Cathodes of the CRT are only 66 volts. With the CRT disconnected from the module the RK, BK,& GK will increase to 202 vdc. . Unit will need a replacement CRT | Muller |
| Sony | KV32S22 AA-2 | RETRACE LINES | KV32S22 serial 8046606 Blue screen with retrace lines then shuts down. | Monitoring the ""C"" board Blue cathode terminal the tech found the voltage was less than 70 volts when connected to the CRT. Removing the module from the CRT the voltage raises the voltage to 189 vdc at KB. CRT... Unit will need a replacement CRT "" | Muller |
| Sony | KV32S22 AA-2 | RETRACE LINES | KV32S22 serial 8011789. Unit has intense blue raster with retrace lines then shuts down. Tapping on neck of tube aggravates the symptom | Tech will need to replace the CRT. 8-733-741-05 | Muller |
| Sony | KV32S22 AA-2 | retrace lines | KV32S22 serial # Unit has bright screen with retrace lines then it will shut down. | Disconnecting the CRT and measuring the RK, BK,& GK on the CRT socket we found all of them running at 187 vdc. But after connecting the socket again to the CRT they immediately dropped to 33 volts. Unit will need a | Muller |
| Sony | KV32S26 AA-2 | retrace | Unit has bright screen with retrace lines. The flyback was changed but did not correct the symptom. | Unit has the 200 vdc cathode source voltage measures 179 vdc but when measuring on the cathode directly the voltage is very low 22 vdc. Disconnecting the socket causes the voltage to rise back to 198 vdc. Unit has a defective CRT. | Muller |
| Sony | KV32V25 AA-2 | retrace | Unit has bright screen with retrace lines then shuts down. | Measuring the 200 volt B+ at the CRT socket we found the voltage to be under 126 vdc. This indicated the 200 volt source was not running. I had the tech check R553 a .47 ohm 1/2 watt resistor and it was open. Replaced the resistor and the set operated normally | Muller |
| Sony | KV32S22 AA-2 | retrace | Unit has bright screen with retrace lines then it will shut down. Measuring the G2 supply finds nearly 420 vdc but the CRT cathodes are running only 55 volts. Disconnecting the CRT socket causes the cathode source voltage to rise over 180 volts. | It appears the CRT is loading down the cathode voltages. Unit will need a replacement CRT. | Muller |