Olympus BH2 Series - 4 Power Supply

D. TROUBLESHOOTING (B2-BDS-3)
No. D-7
@ Is the input voltage of the
display PCB Ul03 normal?
@)
NO
() YES
t
Is the input voltage of the
secondary PCB Ul02 normal?
NO
t YES
)-----t~-®
Replace the Ul02.
®
'
Proceed the work according
~I Replace the Ul03
@ Measure the input voltage of the
display PCB Ul03 with a multimeter.
Normal if the input voltage is as
specified in the following table
when the light intensity control
lever is moved from "Min" to "Max".
Abnormal if not.
Input voltage
CNlii] blue
- CNl m purple
Approx.
DC17-
CNl [1] gray - CNl m purple
l4V
to "No. J- 4. Power Supply"
CN2@] gray - CN2 m
Approx. DC2.5- l2V
*
~ Measure the input voltage of the
secondary PCB Ul02 with a multimeter.
Normal if the input voltage is as
specified in the following table when
the light intensity control lever is
moved from "Min" to "Max". Abnormal
if not.
Input voltage
Ul02lH-ll gray
- Ul02Jw-llwhite
Approx.
ACS- 20V
CN3 []J black - CN3 [}) white
Approx. AC4V
CN2 IIJ purple
- CN2 IT] Approx. DC14
-
l7V
CN2 [1] blue -
CN2 m
Approx. DC14
-
l7V
* Approximately ACO.BV is detected
when the light intensity control
lever is set to the "Min" position
and the main switch is turned on.
This is not defective. When the
light intensity control lever is
moved toward the "Max" direction
after the main switch is turned on
and the voltage once reaches ACSV,
the voltage is not lowered even if
the lever is moved back to the "min"
position. "Approx. ACS -20V" in the
table indicates this state.