Dicas Reparação SONY
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KP53XBR200 RA4 | OSD | KP53XBR200. Unit will not loose the on screen display data that shows the program material, length of time, type or program, rating, ? etc. | This is the XDS (extended data services) information that is broadcast in the VBI. It is selected of the customer has the XDS feature turned on. We could not turn this unit off. Suggest tech to enter the tech menu and initialize the EPROM by pressing ""8"" the ""Enter"". This corrected the symptom. "" | Muller |
| Sony | KP61XBR200 RA4 | NO RASTER | KP61XBR200. No Raster but has sound. Unit will operate for several days then loose raster. During the episode the Timer Led will blink as it does during the warm up sequence | The LED is blinking 5 times. This is an indication of a IK error. Since it is so intermittent I suggested that he could replace the A, CB, CG, & CR boards. These are covered by the S.A.Y.S program. It is possible that a tube is causing this trouble but we cannot confirm it unless we see the symptom. The replacement of the boards is an attempt to eliminate 4 possibilities of the IK generating and sensing circuit. | Muller |
| Sony | KP53XBR200 RA4 | Lines | KP53XBR200 serial 9008681. Unit has a faint vertical line in the picture lines in the picture. Only shows up on tuner video. | Unit needs KIT T-9986-0653 per bulletin # CSV-1 #402. Kit consists of 9 resistors, 4 capacitors, a 22 inch wire connector, a wire tie, and instructions. | Muller |
| Sony | KP61XBR200 RA4 | CRT | Unit has all three CRT burned from running at the store. Unit was sold as a open box item with the tubes already burned. Once all the tubes were installed the tech could not set the Green. Green. During the setup of the Green CRT the unit gave an Error 80. | This error code is an indication the GREEN SKEW is off. There are no electrical adjustments for green skew. What need to be moved is the mechanical rotation of the deflection yoke. The auto convergence is an very unforgiving if the yoke has any tilt at all. | Muller |
| Sony | KP53V80 RA3 | shutdown | KP53V80 serial 9001172 Unit will turn on and a picture will appear but it will periodically arc and shut down. | Blue CRT defective. Arcing in neck. Visual arcing. | Muller |
| Sony | KP53V80 RA3 | rster | KP53V80 After the set is turned on the raster will appear as a bright screen with video. The brightness is intense and lacks contrast. The OSD menu is also missing. | This phenomena is caused by one of the IK buffers on the CRT driver boards. The condition should be treated by replacing All IK buffers and replacing the Spark Gaps The following transistors are the IK buffers Q733{CG board} Q764{CB board} & Q706{CR board). They are hidden by a heat sink for the Video output transistor. Tech needs to order the spark gaps for each CRT module and replace the defective IK buffer. IK buffer number is 8-729-200-17 and the spark gap is 1-517-729-31 Locations for Spark gaps are | Muller |
| Sony | KV53V80 RA3 | RETRACE LINES | KV53V80 serial 9001186. After the set is turned on the raster will appear as a bright red screen with video. | Pulling the red CRT socket and turning on the set we measured the Collector of Q706 The red IK buffer. It should have been ""0"" but it was 9 volts. Replaced Q7056 and did the factory upgrade on the all the CRT modules corrected the problem.Tech replaced the spark gaps for each CRT module and replaced the defective IK buffer. IK buffer number is 8-729-200-17. The spark gap Pn# 1-517-729-31 with locations of SG702, SG732, SG762. "" | Muller |
| Sony | KP53V80 RA3 | raster | KP53V80 After the set is turned on the raster will appear as a bright screen with video. The brightness is intense and lacks contrast. The OSD menu is also missing. | This phenomena is caused by one of the IK buffers on the CRT driver boards. The condition should be treated by replacing All IK buffers and replacing the Spark Gaps The following transistors are the IK buffers Q733{CG board} Q764{CB board} & Q706{CR board). They are hidden by a heat sink for the Video output transistor. Tech needs to order the spark gaps for each CRT module and replace the defective IK buffer. IK buffer number is 8-729-200-17 and the spark gap is 1-517-729-31 Locations for Spark gaps are | Muller |
| Sony | KP46C70 RA3 | raster | KP46C70 serial 9001847 Once the set is turned on the raster will appear as a bright screen with video but the brightness is intense. There are no retrace lines. The set does not have any On screen display, sound OK. | Q733 defective | Muller |
| Sony | KP53V80 RA3 | pixelate | KP53V80 Unit will run fine for hours but color hues will changes and at times and the color will pixelate. Problem does not show up if the color is turned all the way down. The PIP is not effected the PIP color is normal.. | Since the trouble does not affect the B&W portion of the picture it was ruled out any failure with the IK circuitry. Also the PIP was unaffected so we ruled out the PIP module or the Jungle IC. The only logical answer was the 3D comb filter since the video is digitized and the resulted Chroma and Luminance converted back to analog again. This is about the only place where the chroma can become Pixilated. However the tech will probably need to change the ""A"" board. The set is less than 30 days old and the ""A"" board can be replaced under warranty. The set is covered under the SAYS program. Unit had a defective ""A"" board "" | Muller |
| Sony | KP53V80 RA3 | OSD | KV53V80 After the set is turned on the raster will appear as a bright screen with video. The brightness is intense and lacks contrast. The OSD menu is also missing | Monitor the cathodes of each CRT at the instant of turn on. All cathodes were close to 186 volts. But as soon as the raster appeared the voltage dropped to 89 volts. This indicates the CRT's are in saturation. During this test the 200 volt source was still is running nearly 200 vdc.The IK lines are causing this problem. Measuring the IK line at the ""CG"" board at CN731(1) we measured 5 volts DC as soon as we turned on the set. After the picture appeared the voltage did not change. (NOTE: on a working set this voltage should be near Zero volts as long as there is ""0"" beam current. Each cathode had a normal IK pulse of 38 volts. The IK Buffers on each board are very hard to get to so another plan was develped to check these devices. The following transistors are the IK buffers Q733{CG board} Q764{CB board} & Q706{CR board). They are hidden by a heat sink for the Video output transistor. Tech needs to order the spark gaps for each CRT module and replace the defective IK buffer. "" | Muller |
| Sony | KP61S70 RA3 | HIGH VOLTAGE | KP61S70 serial 9005015. Unit is not developing high voltage but has Sound. No secondary voltages from Main power supply | Recommend that the tech order the ""G"" board. Unable to provide part number. "" | Muller |
| Sony | KP61S70 RA3 | CONVERGENCE | KP61S70 serial 9007325 Unit is 1 day old. The customer claimed the set popped then the set lost convergence control for blue horizontal lines. This mean the vertical sub deflection circuit is malfunctioning | On this chassis all of the sub deflection yokes are protected by fuse links. The fuse for the blue vertical sub deflection is PS1506 an it's open. It is a 2 amp device. Part # 1-533-59311 | Muller |
| Sony | KP53V80 RA3 | BRIGHT RASTER | KV53V80 serial 9008877 After the set is turned on the raster will appear as a bright screen with video. But the brightness is intense. Tech replaced the ""A"" board which did not cure the symptom. The set does not have any OSD either "" | Monitor the cathodes of each CRT at the instant of turn on. All cathodes were close to 186 volts. But as soon as the raster appeared the voltage dropped to 89 volts. This indicates the CRT's are in saturation. During this test the 200 volt source was still is running nearly 200 vdc.The IK feedback lines are causing this problem. Measuring the IK line at the ""CG"" board at CN731(1) we measured 5 volts DC as soon as we turned on the set. After the picture appeared the voltage did not change. (NOTE: on a working set this voltage should be near Zero volts as long as there is ""0"" beam current. Each cathode had a normal IK pulse of 38 volts. The IK Buffers on each board are very hard to get to so another plan was develped to check these devices. The following transistors are the IK buffers Q733{CG board} Q764{CB board} & Q706{CR board). They are hidden by a heat sink for the Video output transistor. This unit had a "" | Muller |
| Sony | KP53V80 RA3 | BRIGHT RASTER | KP53V80 serial 9007644 Once the set is turned on the raster will appear as a bright screen with video but the brightness is intense. There are no retrace lines. The set does not have any On screen display, sound OK. | defective Q764 Is leaky | Muller |