Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV27V22 AA-2 | SHUTSDOWN | KV27V22 serial 8004933 Unit has a green screen with slight retrace lines, Tapping on the neck of the tube aggravates the green drive then the set shuts off. | CRT.. Due to this trouble I suggest that we replace the CRT A68KZJ50X | Muller |
| Sony | KV32XBR48 AA-2 | shuts down | KV32XBR48 Unit get a bright red screen then looses horizontal sweep then shuts down. Unit can be turned on again right away | Tech needs to tap on neck of CRT and see if the symptom is aggravated by this action. After tech got to the house an tapped on CRT it was founf that the Tube was causing the | Muller |
| Sony | KV35V35 AA-2 | SHUTDOWN | KV35V35 serial 9011978 Unit flashes bright green with retrace lines then shuts down. When powered back up sometimes the set will be in the ""VIDEO 1"" mode. "" | ?Unit has a defective CRT. A89LJT80X | Muller |
| Sony | KV32S65 AA-2 | shutdown | KV32S65 Unit goes into shut down. Will allow HV to com up but goes into immediate shut down afterwards. At no time did we ever have Data on 9 & 10 of the Jungle IC | Open coil that supplied the B+ to the audio controller and buffer chips. This loss in voltage caused the audio processor chip to load down the Data and Clock lines and cause this symptom. | Muller |
| Sony | KV32S40 AA-2 | shutdown | KV32S40 Unit will turn on and immediately shut down. It does get high voltage briefly. Appears to be entering over current shutdown. Waveform at the collector of the horizontal output appears normal. Horizontal drive is normal if the horizontal output transistor is removed. | Severing the 135 B+ line and placing a 40 watt bulb in series with the supply were are still getting the same symptom but the Light illuminates brightly. We began to disconnect the flyback loads D530, D531. After disconnecting these we found the set will run with D530 disconnected . Checking this device it passes the static check. This component is the -15 volt source. It was suggested to replace D530. This corrected | Muller |
| Sony | KV32S22 AA-2 | shutdown | KV32S22 serial # 8055057. Unit will run fine for 15 ~ 30 minutes with sporadic arcing then it will shut down with a bright green flash | Unit needs replacement CRT 8-733-741-05. | Muller |
| Sony | KV24FV10 AA-2 | shutdown | KV24FV10 Unit will shut down immediately after turn on. But the unit will stay on if the service mode is entered.. | When monitoring the VP at IC001(18) only 1 volt peak to peak was measured. Floating IC001(18) allowed the voltage to return to 5 volt PP. Replacing the IC001 corrected the | Muller |
| 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 |