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-   -   harman kardon hk980 (http://www.diyaudio.com/forums/solid-state/160019-harman-kardon-hk980.html)

jimmytwos 27th January 2010 01:13 AM

harman kardon hk980
 
i have owned this amp for around 3 months, but im having a problem with DC offset. the service manual suggests between 11 and 12 VDC, however when i bought the amp, both channels were between 47v and 53v:confused:? i have managed to adjust to around 11-12, but i keep having to adjust? and i have allowed for temp etc. was thinking is it better for me to replace the cheap adjusting pots with some better ones?
i ask because they are the open type ones, so eventually dust etc will affect them.
what brand/type of pots would you suggest

p.s. i have the service manual, its too big to post here but pm or leave your email and i can send it

thanks
jim

lanchile 27th January 2010 02:00 AM

Quote:

Originally Posted by jimmytwos (Post 2062899)
i have owned this amp for around 3 months, but im having a problem with DC offset. the service manual suggests between 11 and 12 VDC, however when i bought the amp, both channels were between 47v and 53v:confused:? i have managed to adjust to around 11-12, but i keep having to adjust? and i have allowed for temp etc. was thinking is it better for me to replace the cheap adjusting pots with some better ones?
i ask because they are the open type ones, so eventually dust etc will affect them.
what brand/type of pots would you suggest

p.s. i have the service manual, its too big to post here but pm or leave your email and i can send it

thanks
jim

The service manual suggests between 11 and 12 VDC offset? I think you mean millivolts right.

jimmytwos 27th January 2010 02:08 AM

hi yes, millivolts

jimmytwos 21st April 2010 01:01 AM

all sorted


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