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= PRELIMINARY
OPERATIONS
1.
How to remove a casing and the likes.
An
upper
cover,
casing
and
bottom
plate must
be
removed in accordance with Fig. 2 and 3.
Pull the snaps upward.
Remove this screw. ——5
LAS
ye
aoneee
Remove these
=
:
a
screws.
e Ad:
a a
Remove 4
.
A f-
@
ornamental screws at
both sides.
s03
}
=
ANNAN
ANNAN
YY
vt
Remove 9 screws
to take off the
bottom plate.
2.
Checking of parts
(1)
Crystal, vacuum tube
(2) VFO remote terminal plug
(3) Connect a dummy load of 8 ohms (more than 3W)
to the PHONES terminal.
3.
Setting of variable resistor (VR), switches and
the likes.
(1) Final
bias VR
(VRS)
>
Fully counterclockwise
position
(2) RF gain VR > Fully clockwise position
(3) SG switch + Off position
(4) Antenna switch and the likes > REC position
(5) Make connections of the fan cable
4.
Checking
of voltages
(under
receiving
con-
dition)
Refer
to Table
1-a, 1-b with
respect
to voltages
in
various portions.
(1) DC (+)
1)
Power connector terminal No. 4; +150V
2)
Power connector terminal No. 7; +215V +10V
3)
Power
connector
terminal
No. 10;
+300V
+10V
4)
OUT
terminal of X43-0010-00
or Collector
{casing} of 2SA606; +9V
[Note]
Adjust by VR1 on the unit when it diverges from +9V.
(2) Dec (-)
1)
Power connector terminal
No. 1; -9OV +10V
2)
RB relay (relay RL1 ~ 2 in main body), pin
14; OV
3)
TB relay (relay RL?
~ 2 in main body), pin
16; about —35V
4)
Final bias 6LO6, 1st grid (pin 5); about —70V
[Note]
Short-circuiting with others is by no means permitted
when the voltmeter is connected to the first grid.
(3) AC (heater voltage)
1)
Power connector
terminal
No. 5; 12.6V £1V
2)
Power connector
terminal
No. 8; 12.6V #1V
Others
(1) In principle, the STAND-BY
switch
should be
placed
at
REC
during
preliminary
stages
and
adjustment of receiver.
(2) When
Ip of more than 150mA is flowing, the final
stage should always be kept completely turned.
(3) During operation, ventilation by a fan should be
complete.
19
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