ICOM IC-2KL ADJUSTMENT PROCEDURE
7/25/1999
As compiled by AB40J and K9NX
IC-2KL INSTRUMENT TEST
ADJUSTMENT CONDITIONS REQUIRED UNIT POINT UNIT PARTS HOW TO ADJUST READING
INITIAL Connect IC-2KL to the RIF exciter MAIN R44 MAXIMUM CLOCKWISE
SETUP (RF INPUT, ALC, PTT, ACC, etc). MAIN R36 MAXIMUM CLOCK WISE
Connect IC-2KL output to a MAIN R18 TURN R18 AND ADJUST STARTING
dummy load. Connect IC-2KL to FROM MAXIMUM COUNTER-
the power supply IC-2KLPS. CLOCKWISE
IDLE Lift center tap lead from L4 and Ammeter (1 A) Power F1 PA1 R9 @ PA1 ADJUST R9 (ON PA-1) FOR 200 ma
CURRENT insert an ammeter. supply
regulator PA2 R9 @ PA2 REPEAT ABOVE FOR PA-2
unit
Vc METER Meter switch: Vc Multimeter Vc meter MAIN R40 ADJUST R40 TO INDICATE THE SAME
Connect multimeter to fuse (F1) VOLTAGE AS SHOWN ON THE
MULTIMETER
PROTECTION Meter switch: PRO Dummy Load PRO R1 ADJUST ALC ADJUSTMENT POT (R1) CENTER OF "PRO"
CIRCUIT Set mode to RTTY and transmit meter FOR CENTER OF "PRO" ZONE (Vc=50) ZONE
full power @ 14MHz
.MAIN R44. ADJUST R44 GRADUALLY UNTIL THE PROTECTION
PROTECTION CIRCUIT ACTIVATES CIRCUIT
THRESHOLD
VSWR Short the cathode of D2 to ground. Dummy Load FIL C54 Adjust C54 for minimum Minimum
Connect a multimeter to pin3 on J2
of the FIL unit. Set mode to RTTY
and Transmit full power a@14
MHz. Remove the short
Power Meter Switch : PRO. RF Power Meter Antenna MAIN R1 ADJUST ALC ADJUSTMENT POT (R1) Center ALC Zone
Set the mode to RTTY and connector FOR CENTER OF ALC ZONE
transmit full power @ 14 MHz
R18. ADJUST R18 FOR 500W. REPEAT BOTH
ADJUSTMENTS SEVERAL TIMES
POWER Meter Switch : PRO. Dummy Load Meter R11 ADJUST R11 FOR 500W 500W
METER Set the mode to RTTY and
transmit full power @ 14 MHz
IC METER Meter Switch: Ic. Dummy Load Meter MAIN R41 ADJUST R41 TO READ THE SAME CURRENT OF THE
Remove fuse F1 and insert an CURRENT AS THE AMMETER AMMETER
Ammeter
IC PROTECT Meter Switch: Ic. Dummy Load Meter MAIN R36 ADJUST R36 FOR 23 AMPS 23 AMPS
Install a 20 ohm 100W resistor
between ground and the end of R2
opposite from F1.Set the mode to
RTTY and transmit 100w/1.9 MHz
(Remove the 20 ohm resistor after
adjustment).
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