Icom IC-7000 Service Manual - Page 18

DDS ADJUSTMENT, TRANSMITTER ADJUSTMENT, REF OSC, Driver Idle Cur, Final Idle CurHF/50M-1 - s meter adjustment

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4-2 DDS ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION REFERENCE 1 • Enter the adjustment mode. FREQUENCY • Push [F1 (REF)]. 2 • Disconnect P4 from J801 (MAIN unit). • Receiving REF OSC Connect a frequency counter to P4 and set 124.032000 MHz using [DIAL]. Then push [F-4 (SET)]. After the adjustment, exit the adjustment mode and connect P4 to J801 (MAIN unit). 4-3 DISPLAY ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION MEASUREMENT UNIT LOCATION VALUE ADJUSTMENT UNIT ADJUST DISPLAY 1 • Connect between DISPLAY unit ground and MAIN unit ground. • Disconnect J2231 (MAIN unit). • Receiving DISPLAY Connect a frequency 3.579545 MHz counter to CP536 [USA] t h r o u g h a c a p a c i t o r 4.433619 MHz (0.0047 µF) and resistor [Others] (1 kΩ) in series. DISPLAY C536 2 • Receiving Connect a frequency counter to CP505. 15.734 kHz [USA] 15.625 kHz [Others] DISPLAY R541 After the adjustment, connect J2231 (MAIN unit) and disconnect jumper wire between DISPLAY unit ground and MAIN unit ground. 4-4 TRANSMITTER ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION DRIVE/FINAL 1 • Enter the adjustment mode. IDLING • Push [F-2 (TX)]. CURRENT 2 • Connect an RF power meter to Driver Idle Cur Preset the adjustment value to "00" using [ANT1] and [ANT2] connectors. with [DIAL], and check the driving current. 3 • Apply no audio signals to [MIC] jack. • Connect a DC ammeter (5 A type) between power supply and Rotate [DIAL] to set adjustment value to 1 A value from the driving current of "00" value. Then push [F-4 (SET )]. 4 transceiver. Final Idle Cur(HF/50M)-1 Preset the adjustment value to "00" using • Transmitting with [DIAL], and check the driving current. 5 Rotate [DIAL] to set adjustment value to 1 A value from the driving current of "00" value. Then push [F-4 (SET )]. 6 Final Idle Cur(HF/50M)-2 Preset the adjustment value to "00" using with [DIAL], and check the driving current. 7 Rotate [DIAL] to set adjustment value to 1 A value from the driving current of "00" value. Then push [F-4 (SET )]. 8 Final Idle Cur(144M) Preset the adjustment value to "00" using with [DIAL], and check the driving current. 9 Rotate [DIAL] to set adjustment value to 2 A value from the driving current of "00" value. Then push [F-4 (SET )]. 10 Final Idle Cur(430M) Preset the adjustment value to "00" using with [DIAL], and check the driving current. 11 Rotate [DIAL] to set adjustment value to 2.5 A value from the driving current of "00" value. Then push [F-4 (SET )]. After the adjustment, exit the adjustment mode. 4 - 3

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4-3 DISPLAY ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
MEASUREMENT
VALUE
ADJUSTMENT
UNIT
LOCATION
UNIT
ADJUST
DISPLAY
1
•
Connect between DISPLAY unit
ground and MAIN unit ground.
•
Disconnect J2231 (MAIN unit).
• Receiving
DIS-
PLAY
Connect a frequency
counter to CP536
through a capacitor
(0.0047 μF) and resistor
(1 k
Ω
) in series.
3.579545 MHz
[USA]
4.433619 MHz
[Others]
DIS-
PLAY
C536
2
• Receiving
Connect a frequency
counter to CP505.
15.734 kHz
[USA]
15.625 kHz
[Others]
DIS-
PLAY
R541
After the adjustment, connect J2231 (MAIN unit) and disconnect jumper wire between DISPLAY unit ground
and MAIN unit ground.
4 - 3
4-2 DDS ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
DISPLAY
OPERATION
REFERENCE
FREQUENCY
1
• Enter the adjustment mode.
• Push [F1 (REF)].
2
•
Disconnect P4 from J801 (MAIN
unit).
• Receiving
REF OSC
Connect a frequency counter to P4 and
set 124.032000 MHz using [DIAL]. Then
push [F-4 (SET)].
After the adjustment, exit the adjustment mode and connect P4 to J801 (MAIN unit).
4-4 TRANSMITTER ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
DISPLAY
OPERATION
DRIVE±FINAL
IDLING
CURRENT
1
• Enter the adjustment mode.
• Push [F-2 (TX)].
2
•
Connect an RF power meter to
[ANT1] and [ANT2] connectors.
•
Apply no audio signals to [MIC]
jack.
•
Connect a DC ammeter (5 A
type) between power supply and
transceiver.
• Transmitting
Driver Idle Cur
Preset the adjustment value to "00" using
with [DIAL], and check the driving current.
3
Rotate [DIAL] to set adjustment value to
1 A value from the driving current of "00"
value. Then push [F-4 (SET )].
4
Final Idle Cur(HF/50M)-1
Preset the adjustment value to "00" using
with [DIAL], and check the driving current.
5
Rotate [DIAL] to set adjustment value to
1 A value from the driving current of "00"
value. Then push [F-4 (SET )].
6
Final Idle Cur(HF/50M)-2
Preset the adjustment value to "00" using
with [DIAL], and check the driving current.
7
Rotate [DIAL] to set adjustment value to
1 A value from the driving current of "00"
value. Then push [F-4 (SET )].
8
Final Idle Cur(144M)
Preset the adjustment value to "00" using
with [DIAL], and check the driving current.
9
Rotate [DIAL] to set adjustment value to
2 A value from the driving current of "00"
value. Then push [F-4 (SET )].
10
Final Idle Cur(430M)
Preset the adjustment value to "00" using
with [DIAL], and check the driving current.
11
Rotate [DIAL] to set adjustment value to
2.5 A value from the driving current of
"00" value. Then push [F-4 (SET )].
After the adjustment, exit the adjustment mode.