Pll Adjustment - Icom IC-F3GT Service Manual

5-2 PLL ADJUSTMENT

ADJUSTMENT ADJUSTMENT CONDITIONS
PLL LOCK 1 • Operating frequency:
VOLTAGE
• Receiving
2 • Transmitting
3 • Operating frequency:
• Receiving
4 • Transmitting
A : 400–430 MHz B
ˆ „
: N-type
MAIN UNIT
RF power meter
A
400.000 MHz
B
440.000 MHz
470.000 NHz C
D E
490.000 MHz ,
A
430.000 MHz
B
470.000 MHz
500.000 MHz C
D
512.000 MHz
E
520.000 MHz
: 440–470 MHz C : 470–500 MHz
˜
: W-type : M-type
L405
L11
PLL lock voltage
adjustment
LV
PLL lock voltage
check point
MEASUREMENT
UNIT LOCATION
MAIN Connect a digital multi
meter to check point
LV.
D : 490–512 MHz
Bottom view
5 - 4
ADJUSTMENT
VALUE
UNIT ADJUST
1.3 V MAIN
B
1.3 V
1.05 V (except B )
3.0–4.5 V
A B C
( , , )
D
2.0–3.7 V
2.5–4.2 V E
3.0–4.5 V A , C
B
2.7–4.2 V
D
2.0–3.7 V
2.5–4.2 V E
E : 490–520 MHz
L11
L405
Verify