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4 - 5
4-3 PA AND FILTER UNITS ADJUSTMENT
IDLING
CURRENT
(For drive
FETs)
(For final
transistors)
SWR
DETECTOR
1
2
• Operating frequency : 12.2350 MHz
• Mode
: J3E
• Apply no audio signal to the [MICRO-
PHONE] connector.
• Disconnect J6702.
• Preset R6304 and R6412 on the PA
unit to max. counter clockwise.
• Connect a dummy load or RF power
meter to the [ANT] connector.
• Transmitting
• Transmitting
• Operating frequency : 22.0000 MHz
• Mode
: J3E
• Connect the CP7332 (FOR line) on
the FILTER unit to ground.
• Connect an audio generator to the
[MICROPHONE] connector and set
as:
Frequency
: 1.5 kHz
• Transmitting
Rear
panel
Rear
panel
FIL-
TER
Connect an ammeter
(10 A) between an
external power supply
and the transceiver.
Connect an RF power
meter to the [ANT]
connector.
Connect a DC volt-
meter to check point,
CP7331.
2.0 A
0.7 A
140 W
Minimum level
PA
Audio
gen-
erator
FIL-
TER
R6304
R6412
Output
level
C7275
ADJUSTMENT
ADJUSTMENT CONDITIONS
UNIT
LOCATION
VALUE
UNIT
ADJUST
MEASUREMENT
ADJUSTMENT
• After adjustment, connect J6701 to the PA unit.
1
2
• After adjustment, disconnect CP7332 (FOR line) on the FILTER unit from ground.
Summary of Contents for IC-M802
Page 1: ...MF HF MARINE TRANSCEIVER iM802 SERVICE MANUAL ...
Page 27: ...4 10 Transmit peak and total gain adjustment L706 IC M802 TOP VIEW CH ENT RC 25 FRONT PANEL ...
Page 60: ... BOTTOM VIEW MAIN UNIT 8 8 ...
Page 62: ... BOTTOM VIEW FILTER BOARD 8 10 ...
Page 65: ...8 3 6 DRIVER BOARD TOP VIEW 8 13 GND VARO VARI to PA unit J6411 8 3 7 VARISTOR 1 BOARD ...
Page 78: ......
Page 79: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 13901HZ C1 C 2002 Icom Inc ...