Icom IC-PW1 Service Manual page 93

MAIN UNIT ADJUSTMENT (Continued)
ADJUSTMENT ADJUSTMENT CONDITION
1 • Input AC voltage
POWER SET
(HF BAND, • METER-1
AC 200 V,) • METER-2
• Exciter frequency
• Mode
• Transmitting
2
3 • Repeat steps1, 2 several times for precision.
(AC 100 V) 1 • Input AC voltage
[USA], [EUR] • Set ALC adj1 to max. counter-
clockwise.
only
• Exciter frequency
• Mode
• Transmitting
2
3 • Repeat steps1, 2 several times for precision.
(50 MHz, • Input AC voltage
1
AC 200 V) • Exciter frequency
• Mode
• Transmitting
• Turn ALC adj1 to max. counter-
P 1
O
METER SET clockwise.
(HF bands) • METER-1
• Exciter frequency
• Mode
• Transmitting
2
(50 MHz band) • Connect the RF power meter to
1
the [ANT1] connector.
• Exciter frequency
• Transmitting
• Connect a 100 Ω dummy load to
SWR
1
METER SET [ANT1] connector.
• METER-2
• Exciter frequency
• Mode
• Power
• Transmitting
• METER-2
V 1
D
METER SET • Connect
between the "HV" line and the
"GND" line of the power supply
unit.
UNIT
: 200 V Controller
: [P ] scale
O
: [ALC] scale
: 21.1 MHz
: RTTY
REAR
panel
: 100 V Controller
: 14.1 MHz
: RTTY
REAR
panel
: 200 V REAR
: 50.2 MHz panel
: RTTY
REAR
panel
: [P ] scale
O
: 21.1 MHz
: RTTY
Controller
Controller
: 50.2 MHz
Controller
: [SWR] scale
: 14.1 MHz
: RTTY
: 1 kW
: [V ] scale
Controller
D
the DC voltmeter
MEASUREMENT
LOCATION
[METER-2] Set [ALC] meter to
center as below:
Connect the RF 1050 W
power meter to the
[ANT1] connector.
[METER-2] Set [ALC] meter to
center as below:
Connect the RF 520 W
power meter to the
[ANT1] connector.
Connect the RF 1020 W
power meter to the
[ANT1] connector.
Connect the RF 1050 W
power meter to the
[ANT1] connector.
[METER-1] 1050 W
[METER-1] Same power as the
RF power meter.
[METER-2] SWR 2
[METER-2] Same voltage as the
DC voltmeter.
4 - 6
ADJUSTMENT
VALUE
UNIT
REAR
panel
30
20 40
10
50
0
60
2 3
1 1.5
V
D V
SWR
ALC adj
ALC
METER-2
MAIN
REAR
panel
20 30
40
10
50
0
60
2 3
1 1.5
V
D V
SWR
ALC adj
ALC
METER-2
MAIN
MAIN
REAR
panel
MAIN
MAIN
MAIN
MAIN
POINT
ADJUST
ALC adj1
R4
ALC adj1
R6
R5
ALC adj1
R26
R240
R31
R197