Icom IC-726 Service Manual page 38

TRANSMITTER ADJUSTMENT
(CONTINUED)
ADJUSTMENT
ADJUSTMENT
CONDITIONS
MEASUREMENT
VALUE
ADJUSTMENT
POINT
UNIT
LOCATION
UNIT
ADJUST
TRANSMIT
GAIN
1
• Displayed frequency;
14.10000
MHz
•
Mode
;
USB
•
[RF
PWR]
control
:
Max.
CW
•
Attach the audio generator
to
the
[MIC]
connector and
set as;
Level
;
1
mV
Modulation; 1.5
kHz
•
Transmitting
Rear
panel
Connect
the
RF
power meter
to
the
antenna connector.
Preset to
max.
CW. MAIN R85
SOW
[MIC]
control
Maximum
level
MAIN
L37, LI
7,
L16, L14,
L7
2 •
[MIC]
control
;
Max.
CW
SOW
R85
NOTE;
Adjust the [MIC] control
to
keep the output
power
at
50
W
for
each
adjustment.
HF OUTPUT
POWER
1
2
• Displayed frequency;
14.10000
MHz
•
Mode
;
CW
•
[RF
PWR]
control
;
Max.
CW
•
Connect a key
to
the [KEY] jack
and
key
down.
Rear
panel
Connect
the
RF
power meter
to
the
[HF
ANT]
connector.
Preset to
max.
CCW. MAIN
R194,
R241
100
W
R210
3
•
[RF
PWR]
control
;
Max.
CCW
10
W
R208
B
Repeat step 2
and
3 several times.
-
1
Ic
APC
• Displayed frequency;
14.10000
MHz
•
Mode
;
CW
•
[RF
PWR]
control
;
Max.
CW
•
Connect
the
jumper wire
between
pin
3
of
J6 and a ground.
•
Connect a key
to
the
[KEY] jack
and
key
down.
Rear
panel
Connect
the
ammeter between
the
DC
power
supply
and
IC-726.
22
A
MAIN R194
2
After
adjustment,
remove
the
jumper
wire from J6. pin
3.
50
MHz
OUTPUT
POWER
1
• Displayed frequency;
50.00000
MHz
•
Mode
;
USB
•
[RF
PWR]
control
;
Max.
CW
• Attach the audio generator
to
the
[MIC] connector
and
set as;
Level
;
10
mV
Modulation;
1.5
kHz
• Transmitting
Rear
panel
Connect
the
RF
power meter
to
the
[50
MHz
ANT]
connector.
Presel
to
max.
CCW. MAIN R291
Maximum
level
Front
panel
[MIC]
control
10
W
MAIN R291
1
Repeat step 2
and
3 several times.
Po
METER
1
• Displayed frequency;
14.10000
MHz
•
Mode
;
CW
•
[RF
PWR]
control
;
Max.
CW
•
Connect a key
to
the [KEY] jack
and
key
down.
Front
panel
S-METER 10 0
%
,
# B T •
«
*.B
*5—
MOWWVT
/
MAIN R186
CW
DELAY
TIME
1
• Displayed frequency;
14.10000
MHz
•
Mode
;
CW
•
[BK
IN]
switch
;ON
•
[DELAY]
control
;
Max.
CCW
•
Connect an
external electronic
keyer
to
the
[KEY]
jack
and close the
key.
MAIN Connect
the
oscilloscope
to J1
1
and
the electronic
keyer.
Adjust
as
follows;
Keying
1
10 msec.'
MAIN
R241
6
—
10