Dds Adjustment; Display Adjustment; Transmitter Adjustment - Icom IC-7000 Service Manual

4-2 DDS ADJUSTMENT

ADJUSTMENT ADJUSTMENT CONDITION
REFERENCE 1 • Enter the adjustment mode.
FREQUENCY • Push [F1 (REF)].
2 • Disconnect P4 from J801 (MAIN
unit).
• Receiving
After the adjustment, exit the adjustment mode and connect P4 to J801 (MAIN unit).

4-3 DISPLAY ADJUSTMENT

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