Ms9 died after installing a cap kit
- copados33
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Ms9 died after installing a cap kit
Did a complete cap swap, turned it on and it showed vertical collapse, then it shutted off after a few seconds, now it doesn't turn on anymore, what could be tbe problem?
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Re: Ms9 died after installing a cap kit
Cap installed backwards, wrong spec caps since you're using a kit, bad solder joint, solder bridge, etc.
There's quite a lot that could've went wrong, your best bet is going to be to go back over your work carefully and verify capacitor location, values, and polarity.
There's quite a lot that could've went wrong, your best bet is going to be to go back over your work carefully and verify capacitor location, values, and polarity.
- grantspain
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Re: Ms9 died after installing a cap kit
if the chassis was fully working before the cap kit you have either installed a cap incorrectly( either polarity or value) or have bridged traces with solder
if the chassis was not functioning correctly before the cap kit then the vertical ic la7837 is bad
if the chassis was not functioning correctly before the cap kit then the vertical ic la7837 is bad
- copados33
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Re: Ms9 died after installing a cap kit
I think I have found the problem, it vould be the liquid silicone that I used to fix a ceramic cap under the LA7837, that could explain the vertical collapse before the shutdown.
Should I remove the gunk and test or do I need to replace LA7837 straight ahead?
Should I remove the gunk and test or do I need to replace LA7837 straight ahead?
- grantspain
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Re: Ms9 died after installing a cap kit
i doubt the silicon caused it unless its conductive, i expect the la7837 was about to fail in any case
- copados33
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Re: Ms9 died after installing a cap kit
I didn't use solid silicone but a liquid one that I had lying around that needs some time to dry.
- PunkicCyborg
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Re: Ms9 died after installing a cap kit
I had a MS8 collapse after a cap kit a couple years ago. Replaced the vertical hold IC and it fixed the issue and was fine ever since
- copados33
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Re: Ms9 died after installing a cap kit
I checked and double checked the solder joints, the caps I installed were the correct uf, but higher voltage, which AFAIK is ok to do, example: original cap was 2.2uf 35v, I installed a 2.2uf 50v, I just wanted to put 105°C rated ones.chibishin wrote: ↑February 11th, 2019, 5:53 am Cap installed backwards, wrong spec caps since you're using a kit, bad solder joint, solder bridge, etc.
There's quite a lot that could've went wrong, your best bet is going to be to go back over your work carefully and verify capacitor location, values, and polarity.
As I posted earlier I think I have found the problem, now I'm waiting for the LA7837 to arrive, we'll how it goes...
hope I can fix this one that way.PunkicCyborg wrote: ↑February 11th, 2019, 6:34 pm I had a MS8 collapse after a cap kit a couple years ago. Replaced the vertical hold IC and it fixed the issue and was fine ever since
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