Idling Current Adjustment (At 13.5 V) - Icom IC-80AD Service Manual

5-5 IDLING CURRENT ADJUSTMENT (at 13.5 V)

Select an adjustment item using [2] / [8], then set the adjustment value as specifi ed using [DIAL].
ADJUSTMENT
ADJUSTMENT
ITEM
DRIVE AMP
IDLING CURRENT
[VHF BAND]
(Hi power)
(Mid power)
(Low power)
(S-Low power)
[UHF BAND]
(Hi power)
(Mid power)
(Low power)
(S-Low power)
FINAL AMP
IDLING CURRENT
[VHF BAND]
(Hi power)
(Mid power)
(Low power)
(S-Low power)
[UHF BAND]
(Hi power)
(Mid power)
(Low power)
(S-Low power)
NOTE: When "IDLING CURRENT" is adjusted, "TRANSMIT POWER" must be re-adjusted too.
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1 1) Set the power supply voltage to 13.5 V.
(supplying from [DC IN])
2) Connect an RF power meter to the antenna connector.
3) Connect a multimeter between the power supply and transceiver.
4) Set the item [IP1] to "00."
2 • While transmitting, adjust the idling current using [DIAL], then
push [BAND] to store the adjustment value.
3
[ID1]
4
5
6
7
8
9
1 1) Set the power supply voltage to 13.5 V.
(supplying from [DC IN])
2) Connect an RF power meter to the antenna connector.
3) Connect a multimeter between the power supply and transceiver.
2 • While transmitting, adjust the idling current using [DIAL], then
push [BAND] to store the adjustment value.
3
[IP1]
4
5
6
7
8
9
OPERATION
5 - 5
VALUE
–
180–230
mA
150–200
mA
–
700 mA
400 mA
250 mA
900 mA
400 mA
250 mA