Icom BC-119N Service Manual page 7

SECTION 3 ADJUSTMENT PROCEDURES
5-1 PREPARATION
REQUIRED TEST EQUIPMENT
EQUIPMENT
Output voltage
DC power supply
Current capacity
5-2 TRIMMER ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITIONS
REFERENCE 1 • Connect the power supply or AC
VOLTAGE adapter to the J1.
[BC-121N ONLY]: Same adjustment as step 1 for MAIN-A–MAIN-F units.
• MAIN UNIT TOP VIEW
GRADE AND RANGE
: 12 V – 20 V DC
: 1 A or more
EQUIPMENT
Input impedance
DC voltmeter
Output level
MEASUREMENT
UNIT LOCATION
MAIN Connect a DC volt-
meter to the check
point CP4.
CP4
Reference voltage check point
R25
Reference voltage adjustment
3 - 1
GRADE AND RANGE
: 50 kΩ/V DC or better
: 1–500 mV
ADJUSTMENT
VALUE
UNIT ADJUST
5.15 V MAIN
Power supply
or
AC adapter
12 V 16 V/1 A [BC-121N]
12 V 20 V/1 A [BC-119N]
R25