Power Amplifier Idling Current Adjustment Procedures - JVC R-X40 Service Manual

5-(21 Power Amplifire ldling Cunent Aiustment Procedures
DC. VTUM
f-"4-
@u-
R734
@
v
t-
TXX402-1
Power
Amp.
P.C.
Board Ass'Y
Precaution
1.
Turn
R733
and
R734
fully
counterclockwise
before
the
power
switch on.
2.
Allow the
set warm
up
at
least
5
minutes
before
adjustment.
3.
Must
keep
the
heatsink
to
prevent
overheating before
adjustment.
4.
Set
the
volume
control
to
minimum during
this
adjustment.
Adjustment
5.
Connect a DC. VTVM.
to
R751 resistor's
leads
for left
channel, or
to
R752's
leads
for
right channel.
6.
Adiust R733
for
left
channel,
or
R734
for
right
channel,
so
that the DC.
VTVM.
reads 5
mV.
1 \-,
I
J
I
)
,
/l
,1
Fig.9
lv
-8-