Dicas Reparação SONY
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV27TS27 LN-1 | red raster | Sony KV27TS27 LN-1 chassis predominately red picture. | When shorting out the RGB cathodes on the CRT the set will get a perfect black and white picture but shorting out the RGB inputs on the CRT board the set is missing green. Trouble is a defective green output transistor. | Muller |
| Sony | KV32XBR50 LN1 | horizontal | KV32XBR50 Unit has sever horizontal overscan. Measuring Q505(C ) the voltage was near ""0"" volts. Tech changed Q501 but the transistor shorted in less than 5 seconds. "" | IT was discovered that the Q505 was shorting collector to emitter. Also R571 was also showing signs of overheating. It was suggested that L501 & R571 be replace with a new Q505. The set now runs correctly. | Muller |
| Sony | KV32TS27 LN1 | audio | KV32TS27 7039676 Unit has an intermittent squeal in the audio when trine to receive a stereo broadcast. | Tech needs to replace the Audio IC SBX1627-11 | Muller |
| Sony | KV32XBR36 FN | vertical | KV32XBR36 Unit has a slow compressing and decompressing of the vertical sweep. | Q605 was not soldered well | Muller |
| Sony | KV27XBR10 FN | tuning | Unit has AFT drifting as soon as the channel is addressed. It never stops the AFT search. | Unit needs to have the IF/Demodulator module removed from it's shielded compartment and resolder all the adjustable tuning transformers. The AFC coil/transformer has ring fractures around the pins that protrude through the | Muller |
| Sony | KV32XBR76 FN | POOR COLOR | KV32XBR76. Unit has poor color registration but color bars appear near normal. But when cross hair pattern is put up on the screen there are no blue vertical line. There are red and green vertical line | This symptom is a result of a high frequency loss. The ability for the amplifiers in the B drive to turn on an off rapidly is a direct result of how high the bandwidth is. In this case the three outputs of the Jungle IC301(20,22,&23) had the typical signal when viewed on an oscilloscope. All three outputs had the same vertical spike in the center of the horizontal line on the oscilloscope scope. Waveform showing the cross hair | Muller |
| Sony | KV32XBR76 FN | no high voltage | KV32XBR76 Unit will not turn on No high voltage. Measuring the condition of the D1409 is shorted. | The problem is caused by D1409 on the A Board shorting. Problem caused by an intermittent B+ regulator on the G board, IC651, 1-809-524-11. Replacement resolves problem. We have seen a number of these units lately with D1409 shorted. Often it is simply ring cracks on IC651 causing the problem. This unit did have a loose solder connection on IC651(1) but it did not drop the voltage down enough across D1409. The voltage was always 36.6 volts across a 36 volt | Muller |
| Sony | KV32XBR96 FN | HORIZONTAL SWEEP | KV32XBR95S Unit has an extremely wide picture. | I had tech look at Q501(E) the voltage should be about 16 volts. This is the pin modulator input for pincushion correction. In this TV it was 2 volts. A resistance check finds the ohm value to be under 10 ohms. Tech needs to check | Muller |
| Sony | KV32XBR36 FN | dead | KV32XBR36 Unit will not power on. Monitoring the 17 vdc stand by supply we find the voltage running at 4.6 volts | One of the primary filters on the 17 vdc standby supply C662 a 220mfd @ 35vdc was open. | Muller |
| Sony | KV32XBR96 FN | DEAD | KV32XBR96. Unit is dead and has no vertical sweep. | R623 and VDR 602 burned up. Tech needs 8.2 ohm resistor to replace. Tech does not have 8.2 ohm in his stock. However he can make an 8.2 ohm by paralleling a 10 and 47 ohm resistor. This will create a 8.24 ohm resistor. C531 vented is Connected to R881. | Muller |
| Sony | KV32XBR76 FN | Dead | Unit will not turn on. No high voltage. Measuring the condition, D1409 is shorted. | The problem is caused by D1409 on the A Board shorting. Problem caused by an intermittent B+ regulator on the G board, IC651, 1-809-524-11. Replacement resolves problem. We have seen a number of these units lately with D1409 shorted. Often it is simply ring cracks on IC651 causing the problem. This unit did have a loose solder connection on IC651(1) but it did not drop the voltage down enough across D1409. The voltage was always 36.6 volts across a 36 volt | Muller |
| Sony | KV32XBR36 FN | Dead | Unit will not power on. Monitoring the 17 vdc stand by supply we find the voltage running at 4.6 volts. | One of the primary filters on the 17 vdc standby supply C662 a 220mfd @ 35vdc was open. | Muller |
| Sony | KV27XBR10 FN | AFT | KV27XBR10. Serial 7009564. Unit has AFT drifting as soon as the channel is addressed. It never stops the AFT search | Unit needs to have the IF/Demodulator module removed from it's shielded compartment and resolder all the adjustable tuning transformers. The AFC coil/transformer has ring fractures around the pins that protrude through the | Muller |
| Sony | KV32XBR100 DA1 | RETRACE LINES | KV32XBR100 Unit has a bright screen with retrace lines | The 200 vdc line at the CRT is only running at 144 vdc on all cathodes. Unit has an open diode on flyback transformer for the 200 vdc source | Muller |
| Sony | KV32XBR100 DA1 | raster | Unit will not get raster even if the G2 is raised all the way up. We still don't get a bright screen with retrace lines. Tech requesting the Feature Box. This will be a waste of time because the feature box is not necessary | R554 was open | Muller |