Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KV32XBR200 AA2H | NO HIGH VOLTAGE | KV32XBR200 9015636 Unit will click on then it will turn off again. Does not get high voltage. | Unit has b+ to horizontal output but no horizontal drive. If the Horizontal output is removed the set will produce the necessary drive signals. Collector of H. driver Q501(C) measures 85 with Horizontal output removed. Unit appears to have a shorted Flyback or a problem in the horizontal output section that caused the OCP circuit to attack. Product had a defective Flyback transformer. | Muller |
| Sony | KV36FV1 AA2H | GEOMETRY | KV36FV1 serial . Unit has shoulder roll off on the screen. | Gave tech bulletin #387 for the yoke upgrade | Muller |
| Sony | KV32XBR200 AA2H | GEOMETRY | KV32XBR200 Unit has just had the new CRT with the attached yoke replaced today to correct the Shoulder Roll off symptom as described in Bulletin 387R2. However the new tube and yoke did not solve the vertical pincushion symptom | See bulletin #387R1 | Muller |
| Sony | KV32XBR200 AA2H | GEOMETRY | KV32XBR200 Unit has just had the new CRT with the attached yoke replaced today to correct the Shoulder Roll off symptom as described in Bulletin 387. However the new tube and yoke did not get installed. Instead we are going to contact Sony | Bulletin 387 did not mention a THL plate which needed to be adjusted was in the old deflection yoke. After following the new bulletin 387R1 we were able converge the set. Also the new tube needed 3 magnetic on the bell of the tube to correct a purity error and converge the lower right hand corner. | Muller |
| Sony | KV32XBR200 AA2H | GEOMETRY | KV32XBR200 serial # 9018039 .Unit has ""Shoulder Roll Off"" symptom as described in Bulletin 387. Tech will be ordering new yoke and needs the part number "" | We have changed several yokes so far as of 4-2-99 WITH LIMITED SUCCESS. Performing a complete setup of purity, convergence and geometry setting corrects most of the geometry errors. However this set will not be perfect. | Muller |
| Sony | KV32XBR200 AA2H | GEOMETRY | KV32XBR200 serial # 9008075 .Unit has just had the new CRT with the attached yoke replaced today to correct the Shoulder Roll off symptom as described in Bulletin 387. However the new tube and yoke did not solve the vertical pincushion symptom | Bulletin 387 did not mention a plate which was in the old deflection yoke. The missing THL plate needed to be removed from the old yoke and placed in the same slot in the new yoke . After following the new bulletin 387R1 we were able converge the set. | Muller |
| Sony | KV32FV1 AA2H | focus | KV32FV1 Unit has poor focus on the left and right side of screen but OK in the center. If the focus control is varied through its range the sides will become in focus with the center out of focus. | Since this set has the super flat CRT. It incorporates a dynamic focus circuit. In other words the focus voltage varies as the beam travels from left to right. Measuring the Horizontal parabolic wave form up to the input of the primary of the DF transformer, we found the signal to be normal. We were unable to measure the voltages further because they were potentially focus voltage potential. The horizontal parabolic wave form enters the Flyback at the secondary of the DF transformer. Unit had defective flyback transformer. | Muller |
| Sony | KV35XBR48 AA-2 | WRONG COLOR | KV35XBR48 serial 01901543. Customer using this television on a DVD player and has it connected through the ""YUV"" inputs. The gray scale is favoring the green color temperature even if no color is present on the screen. Playing back the same signal in the Composite input or the S-video input the color temperature is normal with normal black and white tracking. It is thought that a separate black and white tracking or RGB drive adjustment in the YUV mode will solve this trouble. "" | According to Sony there isn't any drive adjustments in the YUV mode. This symptom shows up on another Sony television of the same model. Sony claims this is a normal function and there are no plans to address this phenomena. There is nothing wrong with the Television It is operating as designed. | Muller |
| Sony | KV32V20 AA-2 | VIDEO | KV32V20. Unit has poor contrast. Tech has to raise the G2 just to get a raster. When the raster appears the picture is washed out and lacking good contrast ratio. | Gaining a little more information from the tech I found out the set actually had a ""No Raster"" condition, and the timer led was flashing. The G2 was increased tin order to get this washed out picture. The probable cause of this problem is the IK pulses may be too low for the Jungle IC to correctly interpret them. By raising the G2 voltage the IK pulses are raised up to a point where the Jungle will acknowledge them. But by then the RGB drive is too great and a overdrive condition occurs on the CRT. Tech needs to check the components in the ""IK buffer circuit on the ""C: board D1792= 3.9 volt zener diode, & Q1790=2SA1309A "" | Muller |
| Sony | KV36FV1 AA-2 | VERTICAL SWEEP | KV36FV1 Unit has insufficient vertical sweep and vertical foldover at the bottom of the screen. | Suggest the tech try to replace the Charge pump diode and pump up capacitor D561 & C565. This did not correct the symptom. But it was found while moving the wires around the yoke connector the symptom changed slightly. But when tugging on the wiring going into the deflection yoke the tech found a significant change in the vertical deflection scan. There isn't a schematic for the yoke assembly but a small connector inside the yoke housing where the 3 controls were mounted. The connector is called P16.It was not soldered very well. It had thin solder across the land to the pin but what looks like pin oxidation it from making a good electrical connection. Resoldering the connection returned the set to | Muller |
| Sony | KV35V35 AA-2 | vertical sweep | KV35V35. Unit has not vertical sweep and no sound. | No vertical drive from Jungle chip. Data and clock normal. Jungle chip has been replace several times with no effect. EPROM was changed too with no effect. But the CPU IC001 repaired problem. | Muller |
| Sony | KV32S45 AA-2 | vertical lines | KV32S45. Serial # 8047063. Unit has a thin vertical lines in picture that are spaced 1 inch apart on the left side of the screen. It can be scene on all inputs. Best seen on scenes around 10 ~ 20 IRE. | The description sounds like jail bars caused by a ringing in the B+ to the Flyback transformer. It is suggested to install a capacitor with a value of 33 mfd at 250 vdc in place on top of chassis in positive side to FB503 and negative side to ground. This simply increases the capacitance on the 130 volt line to the horizontal output section, and reduce ripple caused by the hard demand of current when the flyback is switched on. Part # 1-107-654-11. This minimized the effect | Muller |
| Sony | KV32XBR48 AA-2 | VERTICAL | KV32XBR48 this is a AA2C chassis. The television has no vertical sweep, and no sound. Tech replaced the vertical output IC without correcting the symptom | Tech is trying to cure the vertical sweep defect but the not the sound. These are related to each other. This set will not develop vertical sweep unless there is data communications between the microprocessor and Jungle IC. Tech needs to monitor the SDA & SCL lines that are marked on this chassis. If there is a short on either line the set will loose vertical sweep. Clue is you need the SCL & SDA lines to control audio, if a short is on these lines or data is corrupt the set will have no audio too. There was no Data or clock on the UX board. Checking the presence of 9 volts we found it to be only 7 volts. Monitoring the protect diode D261 zener diode on the SDA line. Unit had a defective D261 on the UX | Muller |
| Sony | KV32S25 AA-2 | uneven brightness | KV32S25. Unit has Bright glow at top of screen. Unit had 8 volts at pin 5 of vertical output chip. It is supposed to be ""0"" volts. Also unit has no audio. "" | Both 2 and 4 of IC1501 are +12v and -15v.. Appears to have the wrong inputs to the vertical output chip. Data line shorted to ground. The clock line sitting at 5 volts with no clock signal. Removal of the PIP module restores the normal operation/ Unit has defective PIP module. | Muller |
| Sony | KV32S22 AA-2 | uneven brightness | KV32S22. Unit was dead. Has a glow at the top of the screen only when the G2 voltage is increased. | Unit is missing the -15 volt source voltage to the vertical output | Muller |