Icom IC-725 Service Manual page 30

TRANSMITTER ADJUSTMENT
(CONTINUED)
MEASUREMENT
ADJUSTMENT
POINT
ADJUSTMENT ADJUSTMENT CONDITIONS VALUE
UNIT LOCATION UNIT ADJUST
SWR 1 •Displayed frequency: 14.10000 MHz Rear Connect the RF 100W Front [MIC]
DETECTOR •Mode : USB panel power meter to the panel control
•[RF PWR] control :Max. CW antenna connector.
,__
•Connect a jumper wire between R87
2 front side and ground.
'
MAIN Connect the DC Minimum
FILTER
C96
•Apply an RF signal to the [MIC]
voltmeter to J6 pin 2. (See
connector.
p. 6-6)
Level : 10 mV/1.S kHz
•Transmitting
3 After adjustment, remove the jumper wire from R87.
TRANSMIT 1 • Displayed frequency: 14.10000 MHz Rear Connect the RF Pre-set to max. CCW. MAIN RBS
GAIN •Mode :USB panel power meter to the
• [RF PWR] control : Max. CW
antenna connector.
•Apply an AF signal to the [MIC]
sow
Front [MIC]
connector.
panel
control
Level : 1 mV/1.S kHz
•Transmitting
Maximum level
MAIN
L37, L17,
L16, L14,
L7
2 •[MIC] control :Max. CW
sow
RBS
NOTE: Adjust the [MIC] control to keep the output power at
so
W for each adjustment.
OUTPUT 1 •Displayed frequency: 1.91000 MHz Rear Connect the RF Pre-set to max'. CCW. MAIN R194,
POWER •Mode :CW
panel power meter to the
R241
~
•[RF PWR] control :Max. CW antenna connector.
2 • Connect a key to the [KEY] jack and 100W R210
keep the key down.
3
•[RF PWR] control :Max. CCW
10W R208
4 Repeat steps 2 and 3 a couple of times.
lcAPC
1
•Displayed frequency: 14.10000 MHz Rear Connect the 22A
MAIN
R194
•Mode :CW panel ammeter between
•[RF PWR] control : Max. CW the AC power supply
•Connect a jumper wire between J6 and IC-72S.
pin 3 and ground.
• Connect a key to the [KEY] jack and
keep the key down.
2 After adjustment, remove the jumper wire from J6 pin 3.
Po METER 1 •Displayed frequency: 14.10000 MHz
Front
Meter 100 % (full scale) MAIN R186
•Mode :CW panel
•[RF PWR] control :Max. CW
•Connect a key to the [KEY] jack and
keep the key down.
CW DELAY
1 •Displayed frequency: 14.10000 MHz
MAIN Connect the Adjust as follows:
MAIN
R241
TIME
•Mode :CW
oscilloscope to J11
Keying
•[BK IN] switch :ON and the electronic
!
•[DELAY] control :Max. CCW keyer.
•Connect an external electronic
J11
'
•
keyer to the [KEY] jack and close the r
key.
I
:12msec.'