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Accuphase E203

Traverso

Traverso

Active Member
Hello,

I am here with an Accuphase E203 integrated amplifier and I am missing the adjustment set up for the amplifier part.
I am talking about the following pots: VR1, VR2, VR3 and VR4.

Thank you for the help


Alain
 
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No service manuals available for you, or for me, nor parts. To repair it, you must send it to Accuphase's service facility in the country in which you or the original owner bought it.
 
and the adjustments for VR & to 4:


VR 1 and VR 2 are bias current adjustment, and VR 3 and VR 4 are DC Offset adjustment.



Bias current is (1/0.22R) x 0.022V = 0.100A, IOW 100mA through 0.22R emitter resistor half generates 0.022V as per schematic.

Bias regulation is simple on this amp so be very careful setting values and check/monitor for drift, ie check this voltage value before and during adjustments.
 
It's nice that some schematics are getting available for some Accuphase models, as I like their build quality, engineering, and they're classics.
 
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