Icom IC-M502 Service Manual

5 - 2
5-2 PLL ADJUSTMENTS
LOCK
VOLTAGE
REFERENCE
FREQUENCY
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
1
2
3
4
1
• Operating channel : ch16
• Receiving
• Operating channel : ch116
• Receiving
• Operating channel : ch16
• Output power : Low
• Transmitting
• Operating channel : ch116
• Output power : Low
• Transmitting
• Operating channel : ch16
• Output power : Low
• Connect an RF power meter or a
50 Ω dummy load to the antenna
connector.
• Transmitting
MAIN
Rear
Panel
Connect a digital
multi-meter or oscil-
loscope to check
point CP1.
Connect a digital
multi-meter or oscil-
loscope to check
point CP2.
Loosely couple the
frequency counter
to the antenna con-
nector.
3.5 V
4.5–6.0 V
2.5 V
2.5–3.5 V
156.8000 MHz
MAIN
MAIN
L13
Verify
L10
Verify
C70
Lock voltage
adjustment for TX
L10
Reference frequency
adjustment
C70
Lock voltage
check point for RX
CP1
Lock voltage
check point for TX
CP2
Lock voltage
adjustment for RX
L13

Icom IC-M502 Specifications

General

Brand	Icom
Model	IC-M502
Category	Transceiver
Language	English