Icom ID-31A Service Manual page 19

5-3 TRANSMIT ADJUSTMENT (Continued)
• IDLING CURRENT ADJUSTMENT (at 13.5 V)
Select an adjustment item using
ADJUSTMENT
ADJUSTMENT
DRIVE AMP
IDLING CURRENT
(Hi power)
(Mid power)
(Low power)
(S-Low power)
FINAL AMP
IDLING CURRENT
(Hi power)
(Mid power)
(Low power)
(S-Low power)
NOTE: When "IDLING CURRENT" is adjusted, "TRANSMIT POWER" must be also re-adjusted.
• TRANSMIT POWER ADJUSTMENT (at 5.5 V)
Select an adjustment item using
ADJUSTMENT
ADJUSTMENT
TRANSMIT
POWER
(BAND LOW)
(BAND HIGH)
NOTE: When "IDLING CURRENT" is adjusted, "TRANSMIT POWER" must be also re-adjusted.
• TRANSMIT POWER ADJUSTMENT (at 7.4 V)
Select an adjustment item using
ADJUSTMENT
ADJUSTMENT
TRANSMIT POWER
(Hi power)
[BAND LOW]
[BAND HIGH]
(Mid power)
[BAND LOW]
[BAND HIGH]
(Low power)
[BAND LOW]
[BAND HIGH]
(S-Low power)
[BAND LOW]
[BAND HIGH]
/
, and then set the adjustment value as specifi ed using [DIAL].
ITEM
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 ammeter between the power supply and transceiver.
4) Set the item [IP1] to "00."
[ID1]
2 • While transmitting, adjust the idling current using [DIAL], and then
push [ENT] to store the adjustment value.
3
4
5
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 ammeter between the power supply and transceiver.
2 • While transmitting, adjust the idling current using [DIAL], and then
[IP1]
push [ENT] to store the adjustment value.
3
4
5
/
, and then set the adjustment value as specifi ed using [DIAL].
ITEM
1 1) Set the power supply voltage to 5.5 V.
2) Connect an RF power meter to the antenna connector.
[PO5]
3) While transmitting, adjust the TX power using [DIAL], and then
2
push [ENT] to store the adjustment value.
3
/
, and then set the adjustment value as specifi ed using [DIAL].
ITEM
1 1) Set the power supply voltage to 7.4 V.
2) Connect an RF power meter to the antenna connector.
2 • While transmitting, adjust the TX power using [DIAL], and then
push [ENT] to store the adjustment value.
3
[PO7]
4
5
OPERATION
OPERATION
OPERATION
5 - 4
VALUE
–
100–120 mA
90–110 mA
80–100 mA
–
550–670 mA
350–450 mA
140–240 mA
VALUE
80–120 mW
VALUE
–
4.8–5.2 W
2.3–2.7 W
0.4–0.6 W
80–120 mW