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'CF-111B
Preparation
7-633-120-52
|
dial cord, 0. 251 mm dia.
3-434-136
shaft, tuning
@) 7 turn
see note.
7-623-605
SEZ
Ley eyelet
3-825-636°
Stringing
Pointer Setting
1.
Rotate -the tuning shaft counterclockwise to
the full.
2.
Set the pointer to the slit as shown in Fig. 2-12.
3-837-668
pointer
slit
(pointer setting
Position)
X-38376-85-1
3.097.619
sub-chassis
drum, dial (at fully clockwise position)
Fig. 2-17.
Fig. 2-12.
SECTION
3
CIRCUIT
ADJUSTMENTS
3-1.
FM
IF ALIGNMENT
oscilloscope
Test Equipment/Tools Required:
10.7 MHz sweep/marker generator
Oscilloscope
0.0] uF ceramic capacitor
Slot screwdriver
x * %£+
Preparation:
1.
Sweep/marker
Generator Connection:
Across
the
tuning
capacitor
as
shown
in
Fig. 3-1.
Oscilloscope Connection: Record out jack.
Sweep Generator Center Frequency:
10.7 MHz
Marker Generator Frequency: 10.7 MHz
Band Selector:
FM
VOL Control:
Scale
10 faanun
volume)
TONE Control: en
eZ
LER
Ft
Oe
dee AFC Switch:
OF
sweep/marker
generator
Fig. 3-2.
Fm i-f. alignment setup
70.7 MHz
\, marker
Procedure:
|
1.
Turn
the
core
of discriminator -transf ormer
(IFT F5) fully counterclockwise.
_
2.
Turn the core of fm i-f transformer
(IFT FI,
IFT F2, IFT F3) and discriminator transformer
(IFT F4) to obtain the maximum
amplitude
response curve shown in Fig. 3-3.
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