Dicas Reparação SONY
Modelo - Chassis
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| Marca | Modelo (Chassis) | Sintoma | Causa | Solução | Por: |
|---|---|---|---|---|---|
| Sony | KP53S25 RA1 | OSD | KP53S25 Unit will play then it will go to a slight green picture the channel displays will come on automatically | Checking the ID codes in the set wee found all id codes correct except for ID4 it was 64 instead of 80. Resetting the code to 80 caused the set to loose raster and enter the video input mode. We let it do that and initialized the EEPROM. Everything operated correctly after that point | Muller |
| Sony | KP46S15 RA1 | no turn on | KP46S15 Unit will not turn on. At no time can a ""Click"" be heard from the ""G"" board when the power is applied or when the power is turned on. "" | I had the tech measure the Standby B+ at the input of IC652(1) The voltage should be 24 vdc. We only had 9 volts. Checking with an oscilloscope we found 22 volts peak to peak on the input of the regulator. Unit had defective C667 a 470mfd@ 35 vdc. Replacing the capacitor corrected the | Muller |
| Sony | KP53XBR45 RA1 | NO TURN ON | Sony KP53XBR45 unit is not turning on. | F601 & f602 are open. Factory upgrade. Replace C815, C897, 858, & 889 from a 1000mfd @ 35 vdc to a 470 md @ | Muller |
| Sony | KP53V25 RA1 | NO TURN ON | KP53V25 Unit will not turn on. Shorting the Emitter and base of highvoltage output allows the h. drive to appear at the collector of the h. driver transistor. Update: unit had bad flyback. Anode lead will not come out of flyback. Must replace lead link fro | Anode 1-900-211-34 short link for anode lead | Muller |
| Sony | KP53XBR45 RA1 | no raster | KP53XBR45 serial # 9017298 Unit has no raster. Led in front is flashing. Unit does have High voltage and sound. There is an IK pulse on the cathode of each CRT but it is too high, over 90 volts PP. The G2 voltage is too low. | Checking the G2 voltage at each CRT it was discovered it was only 82 volts on all tubes. The G2 wires to each tube were disconnected and measured the free end and it was still only 84 volts. The output from the flyback T801( MV) {supply voltage for the Screen/Focus block was 12,000 volts}. This is normal. Disconnecting the (G2) wire that leads over to CN882(1) allows the picture to come on but the G2 supply only increases by a few volts. It has been determined by these tests that the Focus/Screen High Voltage resistors | Muller |
| Sony | KP53S25 RA1 | no raster | KP53S25. Unit has no raster for 15 to 30 minutes. Unit has high voltage and the timer LED flashes for the normal 15 seconds then goes out. Unit has sound, but no OSD or PIP. | It appears that the Jungle IC IC301 CXA1477AS may be causing this trouble. The we have Luminance up to IC301(1) and OSD at 19,20, &21 | Muller |
| Sony | KP46S25 RA1 | no green | Sony KP46S25. Unit turns purple (looses green) | There has been a case history problem with the sample and hold capacitors C313, C314, C315 in the jungle IC circuit. These devices become leaky and cause a loss of 1 specific color. | Muller |
| Sony | KP53S25 RA1 | lINES | KP53S25.. Horizontal lines in pix in the tuner video and OSD. Actually the lines appear as gaps between the normal scan lines. | Problem appears to be related to the jungle chip. The vertical drive signal is supposed to be a clean saw tooth wave form but when the problem showed up on the screen the saw tooth develops sharp and rapid deviation in the the angular movement of the wave. Replacement of the jungle IC | Muller |
| Sony | KP53XBR45 RA1 | LINE PARING | Sony KP53XBR45 RA1 Chassis. Unit has line paring. ?This condition is when the vertical scan rated changes an possibly reverse directions quickly then return to normal again | I had tech freeze the jungle chip which stopped the symptom. Heating the chip aggravated the symptom. This is caused by the Jungle chip | Muller |
| Sony | KP53XBR45 RA1 | KEYBOARD | Sony KP53XBR45 When the Power is turned off at the set the TV will turn back on again | Install a de-bouncing capacitor 2.2 mfd@ 16vdc) between the Low and High side of the Power on/off switch. The front screen will have to be removed to accomplish this. | Muller |
| Sony | KP46S25 RA1 | HORIZONTAL | KP46S25 This set has horizontal overscan. Tech was trying to find a failure in the circuit that houses Q811. | The tech was in wrong area of the chassis. The area he should be in is the Horizontal output not the High voltage output. The set uses Q510 as H. Output, and Q509 as pin output. Tech needs to verify the presence of Vertical parabolic drive signal at R501 on the ""A"" board. "" | Muller |
| Sony | KP53XBR45 RA1 | HORIZONTAL | KV53XBR45 unit has horizontal overscan | Tech needs to look at the vertical pin correction signal on the ""A"" board CN304(5). This signal must be about 1 volts peak to peak of a vertical parabolic waveform riding on a 2.7 volts DC level. If the voltage is significantly over three volts the Pincushion ciircuit will saturate and damage will occur. If the voltage is too high, too low, or missing the Parabolic wave the Jungle IC should be suspect. "" | Muller |
| Sony | KP53XBR45 RA1 | dead | KP53XBR45 serial number 9017123 Unit is dead. The set went up in smoke. Customer unplugged the set and called for service. | Unit has burned A board on the corner 1E coordinated. This circuit is for the dynamic focus output and the 3 horizontal deflection yoke drives. The corner is completely burned away from the A board. Tech will need a replacement AA board A1297-540-A. | Muller |
| Sony | KP46S15 RA1 | Dead | Unit will not turn on. At no time can a ""Click"" be heard from the ""G"" board when the power is applied or when the power is turned on. "" | I had the tech measure the Standby B+ at the input of IC652(1) The voltage should be 24 vdc. We only had 9 volts. Checking with an oscilloscope we found 22 volts peak to peak on the input of the regulator. Unit had defective C667 a 470mfd@ 35 vdc. Replacing the capacitor corrected the | Muller |
| Sony | KP41T15 RA1 | Dead | Unit is Dead. Was hit by a power surge. D655 was defective. Unit still will not power up after the device was replaced | All power supplies are normal in operation. Unit has Horizontal sweep when checking the Q505(C) we have over 900 v peak to peak . We do not have High voltage or high voltage drive to Q801(B) or Q810(B) find no horizontal drive. Checking the HV protection circuit finds the IC902(1) is sitting at 6.2 volts. This is because IC902(7) is higher than IC902(6). This is attached to the OCP circuit. It is conceivable the flyback is shorted due to the fact the 135 vdc OCP line is being triggered. Unit did have a shorted | Muller |