Pll Adjustment - Icom IC-F21 Service Manual

5-2 PLL ADJUSTMENT

ADJUSTMENT ADJUSTMENT CONDITIONS
PLL LOCK 1 • Operating frequency:
VOLTAGE
• Receiving
2 • Transmitting
3 • Operating frequency:
• Receiving
4 • Transmitting
MEASUREMENT
UNIT
MAIN Connect a digital multi
440.000 MHz
470.000 MHz
TOP VIEW
5 - 4
LOCATION
meter to check point
LV.
C54
PLL lock voltage adjustment (RX)
C68
PLL lock voltage adjustment (TX)
LV
PLL lock voltage check point
ADJUSTMENT
VALUE
UNIT ADJUST
1.3 V MAIN C54
1.3 V C68
2.8–4.3 V Verify
2.8–4.3 V
RF power meter