Pll Adjustment - Icom IC-F2610 Service Manual

5-3 PLL ADJUSTMENT

ADJUSTMENT ADJUSTMENT CONDITIONS
PLL LOCK 1 • Operating frequency : 440.000 MHz
VOLTAGE • Receiving
2 • Operating frequency : 490.000 MHz
• Receiving
3 • Operating frequency : 440.000 MHz
• Transmitting
4 • Operating frequency : 490.000 MHz
• Transmitting
PLL 1 • Operating frequency : 440.000 MHz
REFERENCE • Transmitting
FREQUENCY
• MAIN UNIT
L.V.
PLL lock voltage
check point
R376
Reference frequency
adjustment
MEASUREMENT
UNIT LOCATION
MAIN Connect a digital multi-
meter or an oscillo-
scope to the check
point "LV".
Rear Loosely couple a fre-
panel quency counter to the
antenna connector.
DC power supply
13.2 V/15 A
5 - 3
ADJUSTMENT
VALUE
UNIT ADJUST
2.0 V MAIN
7.0–13.0 V
2.0 V
7.0–13.0 V
490.0000 MHz MAIN
L43
Tx PLL lock voltage
adjustment
L38
Rx PLL lock voltage
adjustment
L38
Verify
L43
Verify
R376