Frequency Adjustment - Icom IC-A210 Service Manual

4-2 FREQUENCY ADJUSTMENT

Select an adjustment item using [↑] / [↓] keys, then set to the specifi ed value using [←] / [→] keys on the connected PC's keyboard.
ADJUSTMENT ADJUSTMENT CONDITION
VDD 1 • CH No. : [AM MID]
Voltage • Receiving
(RX)
Lock Voltage 1 • CH No. : [AM HIGH]
(RX) • Receiving
(TX) 2 • CH No. : [AM HIGH]
• Transmitting
Lock Voltage 1 • CH No. : [AM LOW]
Verify • Receiving
(RX)
(TX) 2 • CH No. : [AM LOW]
• Transmitting
Reference 1 • CH No. : [AM HIGH]
Frequency • Connect an RF Power Meter to
the antenna connector.
• Transmitting
• VDD volatage (RX and TX) adjustments
(TOP VIEW)
OPERATION
Connect a Digital voltmeter to the CP2
on the MAIN UNIT.
Connect a Digital voltmeter to the CP1
on the MAIN UNIT.
Connect a Digital voltmeter to the CP1
on the MAIN UNIT.
Loose couple an Frequency Counter
to the antenna connector.
VDD voltage (RX and TX) check point
CP2
• Lock volatge adjustment
4 - 3
ADJUSTMENT
ITEM/POINT
[F13]
(CS-A210 ADJ)
C136
(MAIN UNIT)
C127
(MAIN UNIT)
(Verify)
[F1]
(CS-A210 ADJ)
Lock voltage (TX)
adjust point
C127
Lock voltage (RX)
adjust point
C136
(TOP VIEW)
VALUE
13.4–13.6
V
3.4–3.6 V
More than
0.5 V
136.975 MHz