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| Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Sony KV-27EXR25 just clicks, (STRS6301 to "A" or not to "A")
This set clicks, the degausing coil energizes and thats all. Almost
every solder joint on the power supply board was cold. The Hor out in circuit does not look shorted. I repaired the solder and the set is still dead. There is an STRS6301 on the power supply board. I have seen a few of these bad over the years and usually just replacing them restores proper operation. However lately I've been reading about the "A" version of this chip as being improved or better. Then again in some forums it seems that its not recommended to replace an original with an "A". Does anyone have any further insight on this? Also not having a schematic, does anyone have a straight forward troubleshooting procedure for this chassis or perhaps a published tip on it that they could possibly share with me? Thanks very much for any assistance you may be able to offer. Lenny Stein, Barlen Electronics. |
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#2
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Sony KV-27EXR25 just clicks, (STRS6301 to "A" or not to "A")
Lenny !
Reflow all solder connections on that Module also ESR all the caps especially thosw close to the Heat sink.I have always used the STRS6301A with 100 percent success. kip -- "Watch the return E-Mail addy its false" "Lenny" wrote in message om... This set clicks, the degausing coil energizes and thats all. Almost every solder joint on the power supply board was cold. The Hor out in circuit does not look shorted. I repaired the solder and the set is still dead. There is an STRS6301 on the power supply board. I have seen a few of these bad over the years and usually just replacing them restores proper operation. However lately I've been reading about the "A" version of this chip as being improved or better. Then again in some forums it seems that its not recommended to replace an original with an "A". Does anyone have any further insight on this? Also not having a schematic, does anyone have a straight forward troubleshooting procedure for this chassis or perhaps a published tip on it that they could possibly share with me? Thanks very much for any assistance you may be able to offer. Lenny Stein, Barlen Electronics. |
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#3
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Sony KV-27EXR25 just clicks, (STRS6301 to "A" or not to "A")
Lenny:
The reply by John/Kip is absolutely correct about the "A" version of the chip...... 100% success..... .....and be absolutely certain to ESR check all the electrolytics on the power supply board.... check and reflow any and all questionable solder joints.... especially near and around the high heat producing parts like power resistors, diodes, chips, etc...... AND also on the main pcb look for bad solder joints on the flyback and HOT and the power resistors, especially near and around the flyback derived B+ circuitry and the main B+ distribution paths. -- Best Regards, Daniel Sofie Electronics Supply & Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "john" wrote in message .. . Lenny ! Reflow all solder connections on that Module also ESR all the caps especially thosw close to the Heat sink.I have always used the STRS6301A with 100 percent success. kip -- "Watch the return E-Mail addy its false" "Lenny" wrote in message om... This set clicks, the degausing coil energizes and thats all. Almost every solder joint on the power supply board was cold. The Hor out in circuit does not look shorted. I repaired the solder and the set is still dead. There is an STRS6301 on the power supply board. I have seen a few of these bad over the years and usually just replacing them restores proper operation. However lately I've been reading about the "A" version of this chip as being improved or better. Then again in some forums it seems that its not recommended to replace an original with an "A". Does anyone have any further insight on this? Also not having a schematic, does anyone have a straight forward troubleshooting procedure for this chassis or perhaps a published tip on it that they could possibly share with me? Thanks very much for any assistance you may be able to offer. Lenny Stein, Barlen Electronics. |
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Sony KV-27EXR25 just clicks, (STRS6301 to "A" or not to "A")
Yes, but is there a difference in the "Sony A" for $30 or the "generic A" for
$7? I'm going to find out next Sony I work on. The last 2 generics I replaced were running over 160 degrees F. I think that's really too hot. I'm anxious to compare the original Sony. Sony still sells both the STRS6301 and 6301A as a different part number. Ron |
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Sony KV-27EXR25 just clicks, (STRS6301 to "A" or not to "A")
RonKZ650:
I think we will all be interested in your future posting with the comparison testing results. "Running too hot" has NEVER been an issue with the $7 "generic" or rather, after market replacements I get from my jobber. 100% OK. The markings on the replacement chips that I have always obtained from my jobber @ $7 appear to be the same as the more expensive Sony supplied chips.... it looks to me like the SAME manufacturer and almost definitely NOT some cheapo Hong Kong, inferior, rip-off.with obvious cosmetic challenges that we are all familiar with. -- Best Regards, Daniel Sofie Electronics Supply & Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "RonKZ650" wrote in message ... Yes, but is there a difference in the "Sony A" for $30 or the "generic A" for $7? I'm going to find out next Sony I work on. The last 2 generics I replaced were running over 160 degrees F. I think that's really too hot. I'm anxious to compare the original Sony. Sony still sells both the STRS6301 and 6301A as a different part number. Ron |
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#6
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Sony KV-27EXR25 just clicks, (STRS6301 to "A" or not to "A")
RonKZ650:
I think we will all be interested in your future posting with the comparison testing results. I meant to also mention I did the test on RCA STR730 series regulator ICs last month. On same set, same meter setup, the original RCA STK 730-030 ran 5 degrees cooler at peak, then a generic STK730-150. It also drew less current at standby, less at normal on conditions, as well as regulating a dead on 140v where the generic was close to 142v. I'll post the STRS6301 results soon. Ron |
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#7
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Sony KV-27EXR25 just clicks, (STRS6301 to "A" or not to "A")
TELEVISION*
SONY* KV27EXR25* DEAD?CLICKING NOISE, B TOO HIGH* CHECK R673 4.7 FOR OPEN* TELEVISION* SONY* KV27EXR25* DEAD, CLICKS, SWITCHING XFMR HAS NO POWER OUT-BOARD G* REPLACE IC651 STRS6301, R656 560, Q611 2SC3311A* I have repaired several of these - first I swap out the str regulator, which is almost always bad. Then take care of the cold joints. If that does not do it one of these 2 tips probably will. best of luck - Tim "Sofie" wrote in message ... RonKZ650: I think we will all be interested in your future posting with the comparison testing results. "Running too hot" has NEVER been an issue with the $7 "generic" or rather, after market replacements I get from my jobber. 100% OK. The markings on the replacement chips that I have always obtained from my jobber @ $7 appear to be the same as the more expensive Sony supplied chips.... it looks to me like the SAME manufacturer and almost definitely NOT some cheapo Hong Kong, inferior, rip-off.with obvious cosmetic challenges that we are all familiar with. -- Best Regards, Daniel Sofie Electronics Supply & Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "RonKZ650" wrote in message ... Yes, but is there a difference in the "Sony A" for $30 or the "generic A" for $7? I'm going to find out next Sony I work on. The last 2 generics I replaced were running over 160 degrees F. I think that's really too hot. I'm anxious to compare the original Sony. Sony still sells both the STRS6301 and 6301A as a different part number. Ron |
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#8
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Sony KV-27EXR25 just clicks, (STRS6301 to "A" or not to "A")
If you are going to make comparisons, why not compare the generic vs the RCA
in the same version of the chip? Leonard "RonKZ650" wrote in message ... RonKZ650: I think we will all be interested in your future posting with the comparison testing results. I meant to also mention I did the test on RCA STR730 series regulator ICs last month. On same set, same meter setup, the original RCA STK 730-030 ran 5 degrees cooler at peak, then a generic STK730-150. It also drew less current at standby, less at normal on conditions, as well as regulating a dead on 140v where the generic was close to 142v. I'll post the STRS6301 results soon. Ron |
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#9
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Sony KV-27EXR25 just clicks, (STRS6301 to "A" or not to "A")
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#10
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Sony KV-27EXR25 just clicks, (STRS6301 to "A" or not to "A")
My set KV34MN11 also have same CLICKing problem, no screen & sound when
power on. Can i try the same solution? Pls help, thks in advance. Lenny" wrote in message om... Thanks to everyone for the advice. I'm ordering the A version today and then I'll dive back in. Best regards, Lenny Stein, Barlen Electronics. (Tim Marcus) wrote in message . com... TELEVISION SONY KV27EXR25 DEAD?CLICKING NOISE, B TOO HIGH CHECK R673 4.7 FOR OPEN TELEVISION SONY KV27EXR25 DEAD, CLICKS, SWITCHING XFMR HAS NO POWER OUT-BOARD G REPLACE IC651 STRS6301, R656 560, Q611 2SC3311A I have repaired several of these - first I swap out the str regulator, which is almost always bad. Then take care of the cold joints. If that does not do it one of these 2 tips probably will. best of luck - Tim "Sofie" wrote in message ... RonKZ650: I think we will all be interested in your future posting with the comparison testing results. "Running too hot" has NEVER been an issue with the $7 "generic" or rather, after market replacements I get from my jobber. 100% OK. The markings on the replacement chips that I have always obtained from my jobber @ $7 appear to be the same as the more expensive Sony supplied chips.... it looks to me like the SAME manufacturer and almost definitely NOT some cheapo Hong Kong, inferior, rip-off.with obvious cosmetic challenges that we are all familiar with. -- Best Regards, Daniel Sofie Electronics Supply & Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "RonKZ650" wrote in message ... Yes, but is there a difference in the "Sony A" for $30 or the "generic A" for $7? I'm going to find out next Sony I work on. The last 2 generics I replaced were running over 160 degrees F. I think that's really too hot. I'm anxious to compare the original Sony. Sony still sells both the STRS6301 and 6301A as a different part number. Ron |
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#11
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Sony KV-27EXR25 just clicks, (STRS6301 to "A" or not to "A")
No! Different alltogether but you could
look for bad solder connections first. Then trouble shoot the power sections. kpi "TKL" wrote in message ... My set KV34MN11 also have same CLICKing problem, no screen & sound when power on. Can i try the same solution? Pls help, thks in advance. Lenny" wrote in message om... Thanks to everyone for the advice. I'm ordering the A version today and then I'll dive back in. Best regards, Lenny Stein, Barlen Electronics. (Tim Marcus) wrote in message . com... TELEVISION SONY KV27EXR25 DEAD?CLICKING NOISE, B TOO HIGH CHECK R673 4.7 FOR OPEN TELEVISION SONY KV27EXR25 DEAD, CLICKS, SWITCHING XFMR HAS NO POWER OUT-BOARD G REPLACE IC651 STRS6301, R656 560, Q611 2SC3311A I have repaired several of these - first I swap out the str regulator, which is almost always bad. Then take care of the cold joints. If that does not do it one of these 2 tips probably will. best of luck - Tim "Sofie" wrote in message ... RonKZ650: I think we will all be interested in your future posting with the comparison testing results. "Running too hot" has NEVER been an issue with the $7 "generic" or rather, after market replacements I get from my jobber. 100% OK. The markings on the replacement chips that I have always obtained from my jobber @ $7 appear to be the same as the more expensive Sony supplied chips.... it looks to me like the SAME manufacturer and almost definitely NOT some cheapo Hong Kong, inferior, rip-off.with obvious cosmetic challenges that we are all familiar with. -- Best Regards, Daniel Sofie Electronics Supply & Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "RonKZ650" wrote in message ... Yes, but is there a difference in the "Sony A" for $30 or the "generic A" for $7? I'm going to find out next Sony I work on. The last 2 generics I replaced were running over 160 degrees F. I think that's really too hot. I'm anxious to compare the original Sony. Sony still sells both the STRS6301 and 6301A as a different part number. Ron |
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#12
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#13
Posted to sci.electronics.repair
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Sony KV-27EXR25 just clicks, (STRS6301 to "A" or not to "A")
Moydock / Lenny:
I relace the STRS6301 with the "A" version ALL THE TIME.... not an issue or problem...... but there are lots and lots of different things other than the chip that can cause the symptom you reported but it is your money and time.... and your television. In addition to replacing the chip you should check for cracked solder connections all over the power supply board.... and with your ESR meter check ALL the electrolytics.... check for shorted power diodes on both primary and secondary side of smps ..... also check around the flyback, HOT, and HDr xfmr and resolder suspect connections..... as always, check for shorted HOT.... and there are other various faults unrelated to the power supply that can cause the symptom you are describing. Failure to identify and repair these faults can result in premature failure of the replacement chip. SAFETY TIPS, repair procedures and troubleshooting information are found on the website for this newsgroup at http://www.repairfaq.org/ A MUST READ for the newbie television repair. After reading the repairfaq if you are still not certain how to proceed and do not have the proper test equipment including an ESR meter then you would be best advised to TAKE your television to a service shop for at the very least a repair cost estimate so you can make an intelligent repair decision with facts instead of internet guesses. A knowledgeable tech with the proper skills and test equipment will actually have to perform testing and troubleshooting to determine the exact failure and faults before giving you a firm repair cost estimate. -- Best Regards, Daniel Sofie Electronics Supply & Repair - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - "Moydock" wrote in message ... Lenny Wrote: |
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