Icom IC-M710

IDLING
CURRENT
(For drive
transistors)
(For final
transistors)
IC APC
SWR
DETECTOR
TRANSMIT
PEAK
4-4 TRANSMITTER ADJUSTMENTS
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
1
2
1
1
2
1
• Display frequency : 12.2300 MHz
• Mode : J3E
• Apply no audio signal to the
[MICROPHONE] connector.
• Transmitting
• Display frequency : 12.2300 MHz
• Mode : J3E
• Apply no audio signal to the
[MICROPHONE] connector.
• Transmitting
• Display frequency : 22.0000 MHz
• Mode : J3E
• Preset R4031 on the PA150W
board to the maximum counter-
clockwise position.
• Connect an electronic load with
10 A load current (example:
KIKUSUI PLZ72W) between lead
of R4035 (power line) and EP4009
(ground) on the PA150W board.
• Connect an audio generator to the
[MICROPHONE] connector and set
as:
Frequency : 1.5 kHz
Level : 100 mV rms
• Connect an RF power meter to the
[ANT] connector.
• Transmitting
• Display frequency : 22.0000 MHz
• Mode : J3E
• Ground the lead of R545 on the
MAIN unit with a wire.
• Connect an audio generator to the
[MICROPHONE] connector and set
as:
Frequency : 1.5 kHz
• Transmitting
• Display frequency : 12.2300 MHz
• Mode : J3E
• Ground the lead of R545 on the
MAIN unit with a wire.
• Connect an audio generator to the
[MICROPHONE] connector and set
as:
Frequency : 1.5 kHz
Level : 3 mV
• Transmitting
Cut the lead wire
(W4011) and connect
a DC ammeter (1 A)
to the cut points.
Unsolder R4026
and connect the DC
ammeter (3 A) to the
unsoldered points.
Connect a DC
ammeter (50 A)
between the DC
power supply and
DC power recep-
tacle (DC input +).
Connect an RF
power meter to the
[ANT] connector.
Connect a DC volt-
meter to R150.
Connect an RF
power meter to the
[ANT] connector.
PA150W
PA150W
Rear
Panel
Rear
Panel
MAIN
Rear
Panel
100 mA
500 mA
30A
140 W
Minimum level
Maximum output power
PA150W
PA150W
PA150W
Audio
generator
FILTER
MAIN
R4022
R4025
R4031
Output
level
C4392
Adjust in
sequence
L89, L88,
L65, L64,
L59
After adjustment, re-solder R4026 on the PA150W board.
After adjustment, remove the electronic load on the PA150W board..
After adjustment, remove the wire from R545 on the MAIN unit.
After adjustment, remove the wire from R545 on the MAIN unit.
4 - 4
After adjustment, re-solder the lead wire (W4011) on the PA150W board.