harman kardon hk980

jimmytwos · 27th January 2010, 01:13 AM

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

? 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

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

? 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

27th January 2010, 01:13 AM	#1
jimmytwos diyAudio Member Join Date: May 2007	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? 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

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27th January 2010, 02:08 AM	#3
jimmytwos diyAudio Member Join Date: May 2007	hi yes, millivolts

21st April 2010, 01:01 AM	#4
jimmytwos diyAudio Member Join Date: May 2007	all sorted

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