Olympus B2-BDT Handbuch zur Fehlersuche und -anpassung - Seite 8
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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.