Icom IC-F620, Service Manual

Page: 14 / 36

LV
PLL lock voltage
check point
C134
PLL lock voltage
adjustment for TX
C133
PLL lock voltage
adjustment for RX
DC power supply
13.2 (13.6) V / 20 A
5 - 3
5-2 PLL ADJUSTMENT
PLL LOCK
VOLTAGE 1
2
3
4
• Operating freq. : 400.000 MHz [L]
440.000 MHz [M]
480.000 MHz [H]
• Receiving
• Output power : Low1
• Transmitting
• Operating freq. : 430.000 MHz [L]
490.000 MHz [M]
520.000 MHz [H]
• Receiving
• Output power : Low1
• Transmitting
MAIN Connect a digital multi-
meter or an oscillo-
scope to the check
point, “LV”.
1.0 V
1.1 V
3.0–4.2 V [L]
3.3–4.5 V [M]
3.3–4.5 V [H]
MAIN C133
C134
Verify
ADJUSTMENT ADJUSTMENT CONDITIONS
UNIT LOCATION
VALUE
UNIT ADJUST
MEASUREMENT ADJUSTMENT