Marantz 2238B adjustments

[tsd71]

hi guys i cant find the service manual anywhere, can you please help me with the idle current and dc offset settings for this unit, any help will be appreciated

thanks

 

[EchoWars]

http://www.vintageaudiomanuals.com/-M-.htm
http://www.stereomanuals.com/man/rep/marantz/marantz-manuals-600-2440-catalog.htm

 

[tsd71]

thank you EchoWars...

 

[AudioPuppet]

Measure the idle current between R763 (+) & R765 (-) adjust trimming pot R731 until it reads 23mv DC. DC offset for this channel should read 0 mv and can be adjusted with R711 ....Then...... Measure the idle current between R764 (+) & R766 (-) adjust trimming pot R732 until it reads 23mv DC. DC offset for this channel should read 0 mv DC and can be adjusted with R712 :thmbsp:

 

[tsd71]

thank you much AudioPuppet....

 

[AudioPuppet]

Your Welcome Brother. I always set my bias slightly lower. So I would go around 16 to 20 mv DC just to be on the safe side