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DISASSEMBLY PROCEDURES
(Remove parts in disassembly order a s numbered.)
1. Removal of Top Cover Ass'y
-
Remove 11 screws
(
@
)
in Fig.
1.
2.
Removal of Bottom Cover
Remove 24 screws
(
@
)
in Fig. 1.
3. Removal of Wood Panel Ass'y
Remove 8 screws (
@
)
in Fig. 1.
4.
Removal of Front Panel
Remove 4 screws (
@
)
and plastic rivet
(
@
)
in
Fig. 1.
--
8
Q
Fig. 1
-
ADJUSTMENTS
Idling Adjustment
1) Remove the wood panel assembly.
2) Adjust VR201 (both L and R) so that the voltage
between
t e s t
pins TP1 and TP2 in the main circuit
board becomes DCGOmV
+
590mV.
Main Circuit Board
I
VR201
T P l
TP2
,
=
Meter A d j ~
Connect a
.
,. .
.
,.
ustment
8.9 dumm
-.--
,.
1 )
y load.
2)
Aalusr
v n r u d
IL
ch) and VR404 (R ch) so that
meter indicator reads O W with no signal applied.
3) Apply 1kHz sine wave signal to INPUT and set the
signal level so that 28.3Vrms voltage is obtained at
both ends of the dummy load.
4) Adjust VR401 (L ch) and VR402 (R ch) so that the
meter indicator reads 1OOW.
5)
eter indicator reads O W with no
iust again if necessary.
Recheck
t
signal appl
hat the m
ied and adj
lvlerer Circuit Board
1
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