Olympus CH20 수리 매뉴얼 - 페이지 26

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CH10/CH20

1-4 Voltage adjustment

ž When variable resistance (KR431400) and transformer (DL150400, DL150500) are replaced, it is

necessary to adjust the minimum voltage. The adjustment procedures are as follows:

ž Setup

Tools required: digital multimeter

Figure-B

Figure-C (100V system)

D. REPAIR PROCEDURE

Figure-A

i. Turn on the power, and fully turn the

VARIABLE RESISTANCE (KR431400) •

counterclockwise so that the brightness of

lamp can be minimum. (Figure-A)

ii.Measure AC voltage at the terminals, ‡ and

of the TRANSFORMER‚. (Figure-B)

(In 100V system, measure it after selecting

the frequency of slide switch S101.)

iii. In 100V system, adjust the voltage with R107

trimmer for 50 HZ, with R109 trimmer for 60

HZ, and in 200V system, with R107 trimmer

so that the minimum voltage can meet the

standard. (Figure-C, D)

Standard

Figure-D (200V system)

D-2

1.4 - 1.5V

1 2