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2-5.
DIAL CORD STRINGING
Preparation
1.
Remove
the chassis.
2.
Cut the dial cord by the specified
length as
shown in Fig, 2-13.
chick telat ES
6
dial cord,
0.25mm
one.
adh
~{
214, turns
3-837-674
shaft, dial
3-837-814
spring, dial cord
Stringing
1.
Fix the dial cord to the protrusion (step @)
and string the cord in numerical order as shown
in Fig. 2-13.
Note: Pass
through
the
dial cord. at
step (4) between the two cords of steps
(2) and
(@) as shown
in Fig. 2-14.
2.
Fasten the both knots with a contact cement.
Pointer Setting
1.
Rotate
the dial shaft counterciockwise
to the
full.
2.
Set the pointer to the slit as shown in Fig. 2-15.
3-837-668
pointer,
slit
(pointer setting
position
Xs
Vs
beens
3-825-636
EX
BYEIGE
1
pulley
Ay
E
@) I
-
@ Fix the cord with
dial shaft and dial drum at
x se37 628
the eyelet.
fully clockwise position.
sudo-chassis
3-837-619
drum, dial (at fully clockwise position)
:
Fig. 2-15
Fig. 2-13
SECTION
3
CIRCUIT
ADJUSTMENTS
3-1.
IF ALIGNMENT
Test Equipments/Tools Required:
Rf signal generator (for fm and a-m)
Loop antenna
VTVM
Screwdriver for alignment
Oscilloscope
71.
Fm I-f Alignment
Preparation:
Sweep/Marker Generator Connection:
to
the
telescopic
antenna
lead
as
shown in Fig. 3-1.
Oscilloscope Connection:
MPX
OUT jack
Sweep Generator
Frequency:
10.7 MHz
Marker Generator
Frequency:
10.7 MHz
Band Selector Setting:
FM
AFC
Switch:
OFF
Procedure:
1. Turn the core of discriminator transformer
(IFT F6) fully counterclockwise.
2. Turn
the
core
of
fm
if
transformers
(IFT Fl ~ IFT F5,
IFT F7) to obtain
the
maximum
amplitude
response
curve
as
shown
in Fig. 3-3.
3. Turn the core of discriminator
transformer
(IFT F6) to obtain the "S" curve response
as shown
in Fig. 3-4.
to sweep/marker
generator
Fig. 3-1
| Sweep/marker generator coupling
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