Re: Pioneer HM82 - No power
Ill order a replacement ic ��
Stegtir
New Member
Last Activity: 04-07-2018, 08:16 AM
Joined: 02-15-2018
Location: Morecambe
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Re: Pioneer HM82 - No power
Hi,
Thanks for the assistance.
I have 320v on both drain pins. I haven't replaced the ic yet. When does the vcc come live? I thought if there is nothing there then the ic isn't being powered?Leave a comment:
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Re: Pioneer HM82 - No power
Hi again,
Replaced the current sense resistors and still no joy.
There is 0v on vcc line still. I've checked everything back to the transformer and all components are fine.
I don't understand why?Leave a comment:
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Re: Pioneer HM82 - No power
Hi,
No shorts on ic pins so hopefully its ok, they are cheap enough anyway. Ive ordered some resistors so I'll update when they arrive next week.
Thanks again!Leave a comment:
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Re: Pioneer HM82 - No power
So R823 is ok, R824 and R825 seem to have gone high. Would this be cause of the rectifiers going short or as a result. What role do they play in the Smps? I'll try and find some replacements and see if we come back on lineLeave a comment:
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Re: Pioneer HM82 - No power
Hi thanks for quick reply.
D222 and D226 were originally shorted. 0vdc on pin 7. D824 test fine . Ill check R833, 4, and 5,they are smd which will be a pain.Leave a comment:
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Re: Pioneer HM82 - No power
I have Pioneer Np01 which uses the same smps.
Found the 2 rectifiers ss315 shorted on the secondary which I have replaced. Still nothing, secondary side is completely lifeless. C805 has 320dc so were good there. C823 has nothing across it do ive replaced that but still no joy. Startup resistor measures fine out of circuit.
Can anyone offer what to check next?Leave a comment:
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