Icom D-STAR ID-31A; D-STAR ID-31E, Service Manual

Page: 18 / 41

5 - 3
5-2 FREQUENCY ADJUSTMENT
Select an adjustment item using
/
, and then set the adjustment value as specifi ed using [DIAL] .
ADJUSTMENT
ADJUSTMENT
ITEM
OPERATION VALUE
REFERENCE
FREQUENCY
[REF]
1 1) Set the power supply voltage to 7.4 V.
2) Connect a power meter or dummy load to the antenna connec-
tor.
3) Loosely couple a frequency counter to the antenna connector.
4) While transmitting, adjust the frequency using
[DIAL] , and then
push [ENT] to store the adjustment value.
Displayed
frequecny
(±200 Hz)
5-3 TRANSMIT ADJUSTMENT
• IDLING CURRENT ADJUSTMENT (at 5.5 V)
Select an adjustment item using
/
, and then set the adjustment value as specifi ed using [DIAL] .
ADJUSTMENT
ADJUSTMENT
ITEM
OPERATION VALUE
DRIVE AMP
IDLING CURRENT
[ID5]
1 1) Set the power supply voltage to 5.5 V.
2) Connect an RF power meter to the antenna connector.
3) Connect a ammeter between the power supply and transceiver.
4) Set the item
[IP5] to "00."
–
2 • While transmitting, adjust the idling current using [DIAL] , and then
push [ENT] to store the adjustment value.
120–140 mA
FINAL AMP
IDLING CURRENT
[IP5]
1 1) Set the power supply voltage to 5.5 V.
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
push [ENT] to store the adjustment value.
180–280 mA
• IDLING CURRENT ADJUSTMENT (at 7.4 V)
Select an adjustment item using
/
, and then set the adjustment value as specifi ed using [DIAL] .
ADJUSTMENT
ADJUSTMENT
ITEM
OPERATION VALUE
DRIVE AMP
IDLING CURRENT
[ID7]
1 1) Set the power supply voltage to 7.4 V.
2) Connect an RF power meter to the antenna connector.
3) Connect a ammeter between the power supply and transceiver.
4) Set the item
[IP7] to "00."
–
(Hi power)
2 • While transmitting, adjust the idling current using [DIAL] , and then
push [ENT] to store the adjustment value.
170–190 mA
(Mid power) 3
120–140 mA
(Low power) 4
100–120 mA
(S-Low power) 5
FINAL AMP
IDLING CURRENT
[IP7]
1 1) Set the power supply voltage to 7.4 V.
2) Connect an RF power meter to the antenna connector.
3) Connect a ammeter between the power supply and transceiver.
–
(Hi power) 2 • While transmitting, adjust the idling current using [DIAL] , and then
push [ENT] to store the adjustment value.
880–980 mA
(Mid power) 3 480–580 mA
(Low power) 4
160–260 mA
(S-Low power) 5
NOTE: When " IDLING CURRENT " is adjusted, " TRANSMIT POWER " must be alos re-adjusted.