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Pioneer S-W700 Subwoofer

coastman49

May 1, 2022
37
Joined
May 1, 2022
Messages
37
Difficult to remove because power board has those 3 cables attached. Tried inverting it to get gravity assist. Should get them off shortly to complete the test. Will let you know. Thanks.
 

coastman49

May 1, 2022
37
Joined
May 1, 2022
Messages
37
These caps won't budge. There is a white elastic glue type substance may be holding it in place as well. I guess I will try removing that.
 

coastman49

May 1, 2022
37
Joined
May 1, 2022
Messages
37
Got both removed and tested. Left one gone and right channel one boderline according to the ESR tester, which I am not sure I trust. Ordered two replacements from DigiKey. Should be here tomorrow.
 

coastman49

May 1, 2022
37
Joined
May 1, 2022
Messages
37
Got the wrong caps fro DigiKey. Waiting for the correct ones. Can't find locally.
 

coastman49

May 1, 2022
37
Joined
May 1, 2022
Messages
37
Did a retest of the newly installed Nichon 8200 mfd, 63 v caps. Measured FWB Gnd. to pin 4 =--6.62 vdc; Gnd to pin 1 = .337 vdc; across pins 2 and 3 = 4.45 vac. Doesn't make any sense. My load light is still bright. Looking at schematic and scratching my head.

Could C-1203 be bad also? Didn't do any measurements on it.
 
Last edited:

73's de Edd

Aug 21, 2015
3,366
Joined
Aug 21, 2015
Messages
3,366
WE just don't happen to have some damaged POWER output transistors STILL installed on the board . . . do we ?
 
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