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Search: Posts Made By: Amapola
Forum: Troubleshooting Audio Equipment 02-27-2020, 01:31 PM
Replies: 5
Views: 257
Posted By Amapola
Re: Harman Kardon PM655 - strange values of voltage

between r23 et r49 i have +23.6v and between r24 et r50 i have -23.7v

c23 i have +14.9v and -15v for c24

24v for c21 and -23.4v for c22

the plus and minus for 25v and 15v should be ok

yes...
Forum: Troubleshooting Audio Equipment 02-27-2020, 11:31 AM
Replies: 5
Views: 257
Posted By Amapola
Re: Harman Kardon PM655 - strange values of voltage

I checked i have 237/238vac .

I have 44.4v for c6 and c8 and -44.4v for c7 and c9...

I checked and adjusted the dc balance and idling current too...it's ok for both channel.

...the heatsink...
Forum: Troubleshooting Audio Equipment 02-27-2020, 06:07 AM
Replies: 5
Views: 257
Posted By Amapola
Harman Kardon PM655 - strange values of voltage

Hi,

I doing a check in this amp (240v version and the switch is on the 240v ) and saw something strange...
After the schematics (power supply zone) ; instead to have on collector +35.6v for Q5...
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