Main Unit (Scope) Adjustment - Icom IC-7600 Service Manual

4-6 MAIN UNIT ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
PRESET 1 • Receiving
2
3
TX PEAK 1 • Frequency
-Preparation- • Mode
• Transmitting (Max. power)
-Adjustment- 2
TX TOTAL 1 • Frequency
GAIN • Mode
• [MIC GAIN]
• Transmitting
TX HIGH 1 • Frequency
POWER • Mode
(HF BAND) • Transmitting
( 50 MHz 2 • Frequency
BAND) • Mode
• Transmitting
1) Turn the transceiver OFF.
2) Reset the CPU. (While pushing and
holding both [F-INP] and [MW], turn
the power ON.)
• Set the variable resister to 3 o'clock
position (viewing from REAR).
1) Connect a Digital multimeter to the
CP1201.
2) Adjust the voltage.
: 14.1 MHz 1) C o n n e c t a n AC M i l l i vo l t m e t e r
: USB and Audio Generator to the [MIC]
connector on the FRONT panel,
and set it as;
Frequency
Level
2) Connect an RF Power meter to
[ANT1].
• A d j u s t t h e T X o u t p u t p o w e r .
(If ALC is activated during adjustment,
reduce the MIC gain.)
: 14.1 MHz 1) C o n n e c t a n AC M i l l i vo l t m e t e r
: USB and Audio Generator to the [MIC]
: Center position connector on the FRONT panel,
and set it as;
Frequency
Level
2) Connect an RF Power meter to
[ANT1].
3) Adjust the TX output power.
: 14.100 MHz 1) Connect an RF Power meter to
: RTTY [ANT1].
2) Adjust the TX output power.
: 50.100 MHz 1) Connect an RF Power meter to
: RTTY [ANT1].
2) Adjust the TX output power.
4 - 9
OPERATION
: 1.5 kHz
: 1 mV
: 1.5 kHz
: 1 mV
ADJUSTMENT
VALUE
POINT
– –
3 o'clock
R1211
position
0.5 V
R1227
(0.3–0.7 V)
– –
Max. TX
L3503
power
R3520 50 W
R1267 103 W
R1262 100 W