Icom ID-51A Service Manual - Page 23

Adjustment, Operation, Value, Dial], Drive Amp, Idling Current, At 13.5 V, Dc In], Final Amp

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5-3 TRANSMIT ADJUSTMENT (Continued) • IDLING CURRENT ADJUSTMENT (at 13.5 V) Select an adjustment item using / , and then set the adjustment value as specified using [DIAL]. ADJUSTMENT ADJUSTMENT ITEM OPERATION DRIVE AMP IDLING CURRENT (At 13.5 V) 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 an ammeter between the power supply and transceiver. 4) Set the item [IP1] to "00." VHF (Hi power) 2 • While transmitting, adjust the idling current using [DIAL], and then push to store the adjustment value. (Mid power) 3 (Low2 power) 4 (Low1 power) [ID1] 5 (S-Low power) 6 UHF 7 (Hi power) (Mid power) 8 (Low2 power) 9 (Low1 power) 10 (S-Low power) 11 FINAL AMP IDLING CURRENT (At 13.5 V) 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 an ammeter between the power supply and transceiver. VHF (Hi power) 2 • While transmitting, adjust the idling current using [DIAL], and then push to store the adjustment value. (Mid power) 3 (Low2 power) 4 (Low1 power) (S-Low power) [IP1] 5 6 UHF 7 (Hi power) (Mid power) 8 (Low2 power) 9 (Low1 power) 10 (S-Low power) 11 NOTE: When "IDLING CURRENT" is adjusted, "TRANSMIT POWER" must be also re-adjusted. VALUE - 100-120 mA 90-110 mA 80-100 mA 95-115 mA 85-105 mA 75-95 mA - 500-620 mA 310-410 mA 110-210 mA 500-620 mA 310-410 mA 110-210 mA 5 - 5

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5 - 5
5-3 TRANSMIT ADJUSTMENT (Continued)
• IDLING CURRENT ADJUSTMENT (at 13.5 V)
Select an adjustment item using
/
, and then set the adjustment value as specified using
[DIAL]
.
ADJUSTMENT
ADJUSTMENT
ITEM
OPERATION
VALUE
DRIVE AMP
IDLING CURRENT
(At 13.5 V)
[ID1]
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 an ammeter between the power supply and transceiver.
4) Set the item
[IP1]
to "00."
–
VHF
(Hi power)
2
•
While transmitting, adjust the idling current using
[DIAL]
, and then
push
to store the adjustment value.
100–120 mA
(Mid power)
3
90–110 mA
(Low2 power)
4
80–100 mA
(Low1 power)
5
(S-Low power)
6
UHF
(Hi power)
7
95–115 mA
(Mid power)
8
85–105 mA
(Low2 power)
9
75–95 mA
(Low1 power)
10
(S-Low power)
11
FINAL AMP
IDLING CURRENT
(At 13.5 V)
[IP1]
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 an ammeter between the power supply and transceiver.
–
VHF
(Hi power)
2
•
While transmitting, adjust the idling current using
[DIAL]
, and then
push
to store the adjustment value.
500–620 mA
(Mid power)
3
310–410 mA
(Low2 power)
4
110–210 mA
(Low1 power)
5
(S-Low power)
6
UHF
(Hi power)
7
500–620 mA
(Mid power)
8
310–410 mA
(Low2 power)
9
110–210 mA
(Low1 power)
10
(S-Low power)
11
NOTE:
When "
IDLING CURRENT
" is adjusted, "
TRANSMIT POWER
" must be also re-adjusted.