Casio ZD-3, Service Manual

Page: 16 / 76

FM Alignment (Figures 2 and 3)
Output meter FM SG Set Oscilloscope
Dummy
load
32
Ω
GND
Figure 2
FM dummy load
R1=Output impedance
of FM SG
R2=75
Ω
- R1/2
Ω
FM ANT
GND
R1
R2
Adjustment of
tracking
88 MHz
Low End
L3
Obtain sine-wave and
maximum amplitude.
1
108 MHz
High End
FM-OSC 2
3 Repeat the above adjustments.
Step Alignment
Frequency
of FM signal
generator
Tuning
dial
setting
Adjustment
Remarks
Tuning range
calibration
90 MHz 90 MHz L4
1
2 106 MHz 106 MHz FM-RF
Max.
4754-022-0
14
J301
Headphone jack