Pll Adjustment - Icom IC-400PRO Service Manual

5-2 PLL ADJUSTMENT

ADJUSTMENT ADJUSTMENT CONDITIONS
PLL LOCK 1 • Operating freq. : 450.000 MHz
VOLTAGE • Receiving
2 • Output power
• Transmitting
3 • Operating freq. : 500.000 MHz
• Receiving
4 • Output power
• Transmitting
LV
PLL lock voltage
check point
UNIT
MAIN Connect a digital multi-
: Low1
: Low1
5 - 4
MEASUREMENT
LOCATION
meter or an oscillo-
scope to the check
point, "LV".
DC power supply
13.8 V / 10 A
ADJUSTMENT
VALUE
UNIT ADJUST
1.0 V MAIN C133
1.0 V C134
3.3–4.5 V Verify
3.3–4.5 V
C133
PLL lock voltage
adjustment for RX
C134
PLL lock voltage
adjustment for TX