Olympus B2-BDT Manuale di risoluzione dei problemi e regolazione - Pagina 9
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A.
TROUBLESHOOTING (B2-BDT)
No.
A-5
2-3
Lamp flickers.
Causes
l .
Contact
failure
of
the lamp
stained contact
in the lamp
2.
Defective variable
resistor
®
3.
Defective
transistor
4.
Defective
UYPC48
Check
the lamp
socket
(mainly
the contact with
the lamp).
QlOl
If the contact
is
stained,
clean
it and check
if the lamp
is normally
lit.
~YES
i
NO
@
Is the variable
resistor
I
RVlOl normal?
J
6
YES
NO
'
Replace the
RVlOl
Is the
lamp normally lit?
YES
'
)
NO
(§)
@
Is
the transistor QlOl
normal?
~
YES
. . . . ®
NO
®
@
UVPC48
caused by
the
socket
RVlOl
Remove the lamp
and screw
from
the
lamp
socket, and check
the
contact
with
the lamp for any
stain.
(Take care not to fly the
spring.)
*
Don't
touch the
lamp by
a bare
hand.
*
Avoid opening
the
contact
excessively.
The
contact will
be broken
.
Normal if
the
resistance value
between
@]
(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.