Dc Balance; Ldle Current - Pioneer SX-3800 Service Manual

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8 , 3 P O W E R A M P L I F I E R
'I'urn VR3,
VRb (L) and VR4, VR6 (R) fulty
around in the counter-clockwise direction, but set
VR1(L) and VR2 (R) to the center positions. With-
out any load or input signal, turn the POWER
switch ON.
DC Balance
1. Adjust VR1(L) for 0V (to within t30mV) be-
tween terminal no.23 and ground.
2. Adjust VR2 (R) for 0V (to within t30mV) be-
tween terminal no.22 and ground.
ldle Current
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1. ;\djusl VRB (L) for 120mV
n o , 2 8 ( + ) a n d n o . 2 5 ( - ) .
2. Adjust VR4(R) for 120mV
n o . 1 7 ( + ) a n d n o . 2 0 ( * ) .
3. Adjust VR5(L) for 150nrV
n o . 2 8 a n d n o . 2 5 .
4 . A d j u s t V R 6 ( R ) f o r 1 5 0 m V
n o . 1 ? a n d n o . 2 0 .
between terminals
between terminals
between terminals
between terminals
N o . 1 7
N o . 2 0
N o . 2 2
N o . 2 3
N o . 2 5
N o . 2 8
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