Mitsubishi DA-C20 - Preamplifier Section Disassembly

6) with
the right side
panel
spread
outward
from its normal
pos.ition,
lift up
the turer section and
arranqe
it
as
shown in
Fig. 6.
To
prevent
sho rt- ci
rcui
ting be-
tween
the tuner section's chassis
and
the
preamplifier's printed
ci rcu.it board,
insert a cloth or
the like in between,
7) with the set
in this
aondition,
the
front end can be adjusted.
8) To remove the
printed
circuit
board
from the chassis when re-
placing
the
parts
on it, the
follo\^7ing screws
are to be re-
mo ved.
(1)
Take off the two holder set-
screws
for meter mounting
(K
in Fig. 7) .
(2)
unscrew the two
push
switch
assenbly
screws
(L
in Fig, 7)
.
(3)
Unscrew
the two
printed
cir-
cuit board assenbly
screws
(M
in Fig.
7).
Disassembl-ing
Preampli fie
r
Section
1)
The order of
disassembly is the
same as
that for the tuner
section,
steps l) through 6).
However,
at Step
6),
the
tuner
section
should be
placed
at
the
back.
2) Remove
the two
front
chassis
fixj-ng screws
(N
in Fig. 5) of
the
preamplifier
se c ti
on.
3) Remove
the three
volume fixing
nuts
(P
of
Fig. 5) of Lhe
front
chassis section,
4) Take
off the switch assenbly
screw
(Q
of
Fig.
5)
of the
front
chassis
section.
5) Remove
the two
printed
circuit
board
(PA-66)
asse(0f,ly
s
crews
(Y
in
Fig.
4).
6) Remove
the coupling
section
(in
the direction
of R shown in
Fig.
6)
of the selector switch
and extension
shaft.
7) Lift
up the
front
chassis
and
turn
the
printed
circuit
board.
PA-67
toward this
side.
(The
condition
sho\am in Fiq'.
6)
Fig.6
Fig.5
P.C
Board
P.C Board
M
l\4
-9-
Fiq.7