Icom ID-51A Service Manual - Page 21

Frequency Adjustment, Transmit Adjustment, Adjustment, Operation, Value

Get Icom ID-51A PDF manuals and user guides View all Icom ID-51A manuals
Add to My Manuals
Save this manual to your list of manuals

Page 21 highlights

5-2 FREQUENCY ADJUSTMENT Select an adjustment item using / , and then set the adjustment value as specified using [DIAL]. ADJUSTMENT ADJUSTMENT ITEM OPERATION 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 connector. 3) Loosely couple a frequency counter to the antenna connector. 4) While transmitting, adjust the frequency using [DIAL], and then push to store the adjustment value. 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 specified using [DIAL]. ADJUSTMENT ADJUSTMENT ITEM OPERATION DRIVE AMP IDLING CURRENT (At 5.5 V) [ID5] 1 1) Set the power supply voltage to 5.5 V. 2) Connect an RF power meter to the antenna connector. 3) Connect an ammeter between the power supply and transceiver. 4) Set the item [IP5] to "00." VHF UHF 2 • While transmitting, adjust the idling current using [DIAL], and then push to store the adjustment value. FINAL AMP IDLING CURRENT (At 5.5 V) VHF UHF [IP5] 1 1) Set the power supply voltage to 5.5 V. 2) Connect an RF power meter to the antenna connector. 3) Connect an ammeter between the power supply and transceiver. 2 • While transmitting, adjust the idling current using [DIAL], and then push to store the adjustment value. VALUE - 150-170 mA 140-160 mA - 180-280 mA 170-270 mA 5 - 3

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
5 - 3
5-2 FREQUENCY ADJUSTMENT
Select an adjustment item using
/
, and then set the adjustment value as specified 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
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 specified using
[DIAL]
.
ADJUSTMENT
ADJUSTMENT
ITEM
OPERATION
VALUE
DRIVE AMP
IDLING CURRENT
(At 5.5 V)
[ID5]
1
1) Set the power supply voltage to 5.5 V.
2)
Connect an RF power meter to the antenna connector.
3)
Connect an ammeter between the power supply and transceiver.
4) Set the item
[IP5]
to "00."
–
VHF
2
•
While transmitting, adjust the idling current using
[DIAL]
, and then
push
to store the adjustment value.
150–170 mA
UHF
140–160 mA
FINAL AMP
IDLING CURRENT
(At 5.5 V)
[IP5]
1
1) Set the power supply voltage to 5.5 V.
2)
Connect an RF power meter to the antenna connector.
3)
Connect an ammeter between the power supply and transceiver.
–
VHF
2
•
While transmitting, adjust the idling current using
[DIAL]
, and then
push
to store the adjustment value.
180–280 mA
UHF
170–270 mA