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ai =740)
aime 740)
m HOW TO REPLACE
ie)
NOD
W
Front Cabinet
Hold Switch
Rear Cabinet
oO
Sens Switch
c fi
During installation, simultaneously fit in A and A'.
Fig. 9
During installation, simultaneously fit in B
and B'.
Fig. 10
DIAL THREADING
. Connect the dial drum (RDG 5905Z) to VC1, and then turn it all the way in the direction (counterclockwise) indicated by arrow @)
as shown in Fig. 1.
. Turn VC2 all the way in the direction (clockwise) indicated by arrow @, and then mount the dial drum (RDG 5906Z) in a position
like that shown in Fig. 1.
. Mesh the VC2 dial drum (RDG 5906Z) with the VC1 dial drum (RDG 5905Z) by fitting the H cut parts together first. (Fig. 2)
. Wind the dial cord as shown in Fig. 3.
. Turn the tuning shaft counterclockwise.
. Attach the pointer to the dial cord (Fig. 4), and then slide it downward to the 0 point as shown in Fig. 5.
. Secure in place with locking enamel paint.
|Locking Enamel |
L— Point. — — J
Fig. 4
MEASUREMENTS AND ADJUSTMENTS
@ ALIGNMENT INSTRUCTION
READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT
1. Set volume control to maximum.
6. Set power source voltage to 4.5 VDC.
2. Set tone control to high.
7. Output of signal generator should be no higher
3. Set band switch to LW, MW, SW1~6 or FM.
than necessary to obtain an output reading.
4. Set hold switch to OFF.
5. Set sens switch to DX.
mg LW, MW, SW1~6 ALIGNMENT
SWE I roa ag
RADIO DIAL
(ELECTRONICS
EP
GEN
BAND
SETTING
VOLTMETER
| ADJUSTMENT
CONNECTIONS
|FREQUENCY
or SCOPE)
AM-IF ALIGNMENT
T2 (AM IFT)
LW-RF ALIGNMENT
L7 (LW
Adjust for maximum
'
(* 1)
output. Adjust L7 b
150kHz
Tune to signal.
ANT Coil) | moving
coil Bobbin'
along
ferrite core.
et
Adjust for maximum
285 kHz
:
=
output.
ANT Trimmer)
| Repeat steps
P
:
Output meter
.
F
Tuning capacitor
:
L19 (MW OSC
Adjust for maximum
fully closed.
ACIOSS VOICE
Coil)
output.
CT2-1 (MW
F
(2)(5).
coil.
Tuning capacitor
"
beaut
fully open.
Lot
4
OSC Trimmer)
je
) Le (MW
Adjust for eae
:
(#1
output. Adjust
L6 by
550kHz
| Tune to signal.
ANT Coil) | moving coil bobbin
along ferrite core.
Adjust for maximum
1,500 kHz
CT2-2 (MW
output.
(* 1) Cement antenna bobbin with wax after completing alignment.
ANT Trimmer)
| Repeat steps
SW1~6 2nd LOCAL OSC ALIGNMENT
(6)~(9).
—
Tuning capacitor
L21 (SW1~6
Adjust for maximum
fully closed.
OSC Coil)
output.
REMARKS
Fashion loop of
several turns of
wire and radiate
signal into loop of
receiver.
Output meter
across voice
coil.
Point of non-
interference. (on/
about 600kHz)
Adjust for maximum
(1)
MW
output.
LW
= OS) LS
(3)
LW
LW
2
= =
=
>
—
Fashion loop of
several turns of
S
=
=
gS
=
=
wire and radiate
signal into loop of
receiver.
511kHz
=
= =
Ss
=
=
Connect to test
point YW through
ceramic capacitor
(10)|
SW3
(6 pF). Negative
side to test point
10.975 MHz
Adjust for maximum
(* 2)CT8 (SW1~6]
output.
OSC Trimmer) | Repeat steps
(10) and (11).
Tuning capacitor
fully open.
(* 2) If the frequency can not adjust '10.425 MHz+5kHz"' please re-adjust it by CT1-3 (SW1~6 OSC).
SW1~6 1st IF ALIGNMENT
11.800 MHz
F
Output meter
*3
;
F
Ww.
a
Point of non-
:
(*3) T4
Adjust for maximum
- | ot
"at 400Fe. | interference.
pt
(SW1~6 IFT) | output.
(*3) After alignment, please confirm the oscillate frequency of T4 IFT.
The reading should be figure below.
SW1:
Ea
am
SW5:
26.050 MHz+1.5 kHz
FREQUENCY COUNTER
SW2: 17.900
MHz+1.5kHz
SW6: 28.425 MHz+1.5 kHz
4
+
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