Olympus BH2 Series - Page 30

C. ADJUSTMENT (B2-BDS-2)
No. C-l
1. Measuring Instruments To Be Used
RMS type multimeter
(A multimeter capable of measuring an RMS value)
* An ordinary multimeter can not be used.
Lamp house with a 12V/l00W halogen lamp
* Use a lamp house with small contact resistance and not used for
a long time.
2. Locations of Adjusting Trimmers
LED
one
RV2 RVl
UYPC65
3. Adjustment Procedure
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(j)
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Set the light intensity control lever to the "Min" position, and
turn on the main switch.
Set the light intensity control lever to the "Max" position.
Turn the adjusting trimmer RV2 fully clockwise.
Turn the adjusting trimmer RVl fully counterclockwise.
Measure the lamp output voltage with a multimeter (RMS type), and
turn the adjusting trimmer RVl clockwise so that 11.8 ± 0. 2V is obtained.
* Measure the output voltage at the brass part for connecting the lamp
house as illustrated below.
type multimeter
Turn the adjusting trimmer RV2 counterclockwise to set the output
voltage to 11.7 ± 0.2V.
Set the light intensity control lever to the "Min" position, and
verify that the output voltage is 3V or lower.
* Defective if the voltage is not lower than 3V.
Repair or replace the PCB UYPC65.
Turn off the power, and wait until the lamp goes out completely.
Set the light intensity control lever to the "Min" position, turn
on the power and verify that the lamp is lit.
Verify that only the left-most LED is lit when the light intensity
control lever is set to the "Min" position and all the LEDs are lit
when the lever is set to the "Max" position.