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Sony Repair Tips




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Search: sony
Results: 20088
Make Model Symptom Problem Solution By
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
SONY KP46S15
RA1 		Dead Unit has an overheated standby transformer. the 20 volt power supply is running at 3 volts. I had tech disconnect the connectors to the ""m"" board m cn653 on the ""g"" board. this removed the load on the 20 volt stand by and let the 12 volt stand by to rise to near 20 volts too. it is possible we have two regulators bad ic652 and ic001. ic001 may have been damaged by too much voltage on its input because of a defective ic652. or tsound is a severe load on the output of ic001 the 5 volt standby on the ""m"" board wsound the 12 volt stand by enters on connector cn053 pin 1 then to the ic001 a post 5 volt regulator. tsound is also a 1000 mfd @ 6.3 vdc on the output of the 5 volt post reg. suggest the tech bring out both regulators and the capacitor c002 as a precaution. "" Muller
SONY KP46S15
RA1 		Dead Dead. unit has leaking crt's. both red and blue crt's are noticeably leaking with the green showing signs of moisture around the expansion chamber. Unit will need replacement crt and the convergence output ic's. Muller
SONY KP61XBR48
RA1 		Dead Kp61xbr48 unit is dead. q601 & q602 are shorted along with r607 open. preliminary checks of the secondary loads on this supply indicate no shorts circuits. replacement of these devices again resulted in the instant failure of these transistors again. Forcing the power supply on with artificial loads on the + & -135 vdc power supply allowed the supply to run correctly. high voltage was disabled by removing g4 connector. this disables the b+ to the high voltage output transistor q801. it should be known this television has a high voltage output transistor and a horizontal output transistor q508. with the hv disabled we could check out the h. output stage with reduced b+ and current by placing a 40 watt light bulb in series with the -135 power supply. al power up with the shutdown defeated, the bulb lit up brilliantly. this indicated too much current. a process of elimination indicated c514 was breaking down under operating voltages. the value was a .0068 @ 1.2kv. i physically measured .001 mfd. replaced Muller
SONY KP61V25
RA1 		Dead Kp61v25 serial 9001930 dead Unit has no high voltage. ""e"" board is wet from glycol coolant leak from the red and blue crt's that are leaking red an blue tube "" Muller
SONY KP46S26
RA1 		Dead Kp46s26 serial 9003745. the set is completely dead All three tubes are leaking. coolant leaking on ""e"" board. "" Muller
SONY KP46S15
RA1 		Dead Kp46s15. unit has an over heated stand by transformer. the 20 volt power supply is running at 3 volts. I had tech disconnect the connectors to the ""m"" board m cn653 on the ""g"" board. this removed the load on the 20 volt stand by and let the 12 volt stand by to rise to near 20 volts too. it is possible we have two regulators bad ic652 and ic001. ic001 may have been damaged by too much voltage on its input because of a defective ic652. or tsound is a sever load on the output of ic001 the 5 volt standby on the ""m"" board wsound the 12 volt stand by enters on connector cn053 pin 1 then to the ic001 a post 5 volt regulator. tsound is also a 1000 mfd @ 6.3 vdc on the output of the 5 volt post reg. suggest the tech bring out both regulators and the capacitor c002 as a precaution. as a idea this board can be worked on outside of the "" Muller
SONY KP46S15
RA1 		Dead Kp46s15 serial 9013723 dead. unit has leaking crt's. both red and blue crt's are noticeably leaking with the green showing signs of moisture around the expansion chamber Unit will need replacement crt and the convergence output ic's. Muller
SONY KP41T25
RA1 		Dead Kp41t25 serial 9006330 unit is dead. Further checking has discovered the ""e"" board has a large hole burned through the board caused by a coolant leak from one of the crt "" Muller
SONY KP41T25
RA1 		Dead Kp41t25 serial 9003158. unit is dead. all three tubes are leaking. unit has been leaking for quite a while. The ""e"" board is heavily corroded and cannot be sμFficiently cleaned. e module and all 3 crt's must be replaced. "" Muller
SONY KP41T15
RA1 		Dead Kp41t15. unit has coolant leak which destroyed the ""e"" board. "" Unit will need a replacement ""e"" board. "" Muller
SONY KP41T15
RA1 		Dead Kp41t15 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 on this due to the fact the 135 vdc ocp line is being triggered. unit did have a Muller
SONY KP41T15
RA1 		Dead Kp41t15 serial 9012082 unit has a burned hole in the ""d"" around r1625, r1627, r1629, & r1621 "" Board will need to be replaced. hole is approximately 1 inch square hole under ic1601around the current limiting resistors. board number is a-1346-296-a and is no longer available from sony world parts center Muller
SONY KP46S25
RA1 		Crt Kp46s25 serial# 9021406 all 3 crt's leaked damaged to e-board Unit needs blue crt and attempt to clean the ""e"" board if possible "" Muller
SONY KP46S15
RA1 		Crt Unit has leaking crt. unit has convergence. both red and green crt are leaking coolant. damage is localized to just the crt's. Unit will need replacement red and green crt's. Muller
SONY KP53XBR45
RA1 		Crt Kp53xbr45 serial 9032096. unit has burned crt's again. crt were replaced in october of 1998 because of a bar burned across the face plate. now the same bar is burned across the face plates of green and blue crt's. this is caused by the stock market channel and or cnbc banner at the bottom of the screen This customer was warned last year this would be a 1 time replacement for this symptom. they were warned that continuous display of a stationary image will burn any crt especially a projection television. Muller