Icom IC-F21S service manual PLL Adjustment, PLL Lock, Main, Voltage

5-2 PLL ADJUSTMENT

ADJUSTMENT		ADJUSTMENT CONDITIONS		MEASUREMENT		VALUE	ADJUSTMENT
			UNIT		LOCATION		UNIT	ADJUST
PLL LOCK	1	• Operating frequency:	MAIN		Connect a digital multi	1.3 V	MAIN	C54
VOLTAGE		440.000 MHz			meter to check point
		• Receiving			LV.
	2	• Transmitting				1.3 V		C68
	3	• Operating frequency:				2.8–4.3 V		Verify
		470.000 MHz
		• Receiving
	4	• Transmitting				2.8–4.3 V

RF power meter

C54

PLL lock voltage adjustment (RX)

C68

PLL lock voltage adjustment (TX)

LV

PLL lock voltage check point

TOP VIEW

5 - 4