Px-1981 Preparation; Subreg Board Adjustment - Icom IC-PW1 Service Manual

4-4 PX-1981 PREPARATION

' ' REQUIRED TEST EQUIPMENT
EQUIPMENT
DC voltmeter Input impedance
Variable load-resistor Power capacity
NOTE:
All adjustments must be input 200 V AC except a part of CONV-CTRL ADJUSTMENT.

4-5 SUBREG BOARD ADJUSTMENT

ADJUSTMENT ADJUSTMENT CONDITION
1 • Pre-set R12 and R15 to maxi-
OUTPUT
VOLTAGE mum counterclockwise position.
LIMITTER 1 • Connect a variable load-resistor
between J1, pin 1 and pin 6.
2
J1 pin 1, pin 6
Output voltage check point
Limitter check point
GRADE AND RANGE
: 50 kΩ/DC or better
: 2800 W or more
UNIT
SUBREG
SUBREG
DC voltmeter
Load-resistor
EQUIPMENT
Mesurement
Ammeter
capability
MEASUREMENT
LOCATION
Connect a DC volt-
meter between J1,
pin 1 and pin 6.
Connect an amme-
ter between J1, pin
1 and variable load-
resistor.
Connect a DC volt-
meter between J1,
pin 1 and pin 6.
Ammeter
Limitter adjustment only
R12
Pre-set to maximum counter-clockwise
Output voltage adjustment
R15
Pre-set to maximum counter-clockwise
Limitter adjustment
SUB-REG UNIT
4 - 10
GRADE AND RANGE
: 0.1–100 A
ADJUSTMENT
POINT
VALUE
UNIT
13.6 V SUBREG
Variable
6.2 A
resistor
Below 13.3 V SUBREG
ADJUST
R12
load-
R15