Olympus BH2 Series - Page 8

A. TROUBLESHOOTING (B2-BDT) No. A-4
2-2 Light intensity adjustment fails.
®
I
SUlOl SU102
L_ ______ c_h_a_n_~
TlOl
UVPC4B
Causes
l. Defective variable resistor RVlOl
2. Defective transistor QlOl
3. Defective UYPC48
Is the variable
resistor
RV-101 normal?
YES
NO
Replace
the RVlOl.
Is the lamp light
intensity adjustable?
j_
YES t
I
NO
(END
l
Is the transistor
QlOl
normal?
1
YES
NO
Replace the QlOl.
I
Is the lamp light
intensity adjustable?
YES)
~)
NO
Replace the UYPC48.
®
Normal if the resistance value
between 0J (orange) and ~ (blue)
varies smoothly in 0 to 500~ when
the light intensity control lever
is slid with the Jl02 removed.
Abnormal if not.
@ Normal if 0.6V or greater voltage
is generated between the base
(yellow) and the emitter (brown)
of QlOl when measured with a
multimeter with the light intensity
control lever set to the Max.
position. Abnormal if the voltage
is lower than 0.6V.