Icom IC-751A Service Manual page 69

TRANSMITTER ADJUSTMENT
Adjust RF
®SWR 6 | © Frequency display: 14MHz FRONT | Po METER
METER
® RTTY mode
PANEL
POWER
PANEL | POWER
® METER SWITCH: Po
CONTROL
CONTROL
© Transmit mode until the
meter needle
is at "SWR
Multifunction meter SET".
(SWR scale)
© METER SWITCH: SWR
SWR METER
Adjust to FILTER
C36
® Transmit mode MIN. SWR
(less than
1.2).
7 | © Connect a 1000 or 25Q dummy
SWR METER
SWR 2
MAIN R96
load to the ANTENNA
CONNECTOR
© Transmit mode
8 | © Remove any connection to the
SWR 3
R95
ANTENNA CONNECTOR
° Transmit mode Multifunction meter
pe (SWR scale)
®Ve
9 | © SSB mode
Vc METER
13.8V R106
METER @ MIC GAIN CONTROL: fully CCW
® METER SWITCH: Vc S e B h 0 sao
® No MIC input ANA ay ue
® Transmit mode "SATE
Multifunction meter
|... ee eee (Vc scale)
@SWR
10 | ¢e RTTY mode
REAR
Connect an ammeter Less than
Verify
APC
e RF POWER CONTROL: MAX.
PANEL | between the AC POWER | 12A
Remove any connection to the SUPPLY and the
ANTENNA CONNECTOR transceiver.
TRANSMIT
1 | © CW mode
MAIN
Connect lead of an 19ms MAIN
R451
START © VOX SWITCH: ON oscilloscope to the D13 SEND LINE
TIME @ KEYER SPEED CONTROL: MAX. cathode of D13.
CW RF Connect other lead of an fy
* VOX DELAY CONTROL: MAX. oscilloscope to J8. Hi)
CCW , ut }
@ Key down to dot position J8 OUTPUT POWER
FM
1 | © Frequency display: 28MHz REAR
Connect a deviation +4.7kHz
MAIN R292
DEVIATION ® FM mode PANEL | meter to the ANTENNA
® MIC GAIN CONTROL: MAX. CW CONNECTOR through
® Apply an AF signal to the MIC an attenuator.
CONNECTOR at 1.0kHz 10mV