Pll Adjustments - Icom IC-2100H Service Manual

4-2 PLL ADJUSTMENTS

ADJUSTMENT ADJUSTMENT CONDmoN
1 • Displayed frequency :
PLL LOCK
VOLTAGE
•Receiving
2 • Transmitting
1 • Displayed frequency :
PLL
REFERENCE
145.000 MHz [ E UR, TPE, THA)
FREQUENCY 146.000 MHz [ I TA, USA, SEA,
• Output power
• Transmitting
L35
PLL
lock voltage
adjustment for RX
L2
PLL lock voltage
adjustment for TX
MEASUREMENT
UNIT
MAIN
Connect a digital
14 5.000 MHz multi-meter or oscil-
loscope
check point CP1.
Rear Loosely couple the
Panel frequency
LA)
to the antenna con-
: Low nector.
4- 2
VALUE
LOCATION
v
1.25-1.30
to the
v
1.45-1.55
145.0000 0 MHz
counter [ E UR, TPE, THA]
14 6.00000 MHz
[ I TA, USA, SEA, LA)
0
E> E:)
ADJUSTMENT
POINT
UNIT
ADJUST
MAIN L35
L2
MAIN C119
DC power supply
13.8 V / 20A
PLL
lock voltage
check point
Reference frequency
adjustment