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B.
TROUBLESHOOTING (B2-BDS-2)
No. B-5
3.
Display
3-l
Abnormal
display
SW!03
T 1 0 1
LAMP
J3J2
UYPC65
JJ03
J201
JJ02
Causes
l.
Defective variable resistor RVlOl
2.
Defective UYPC65
3.
Defective UYPC64
4.
Defective power supply part
*
The display with
LED is unstable when a lamp is burnt out or not mounted.
Be sure
to mount a lamp and set the primary voltage selector switch
SW103
(the 100/llSV
selector switch in the lOOV channel and the 220/240V
selector switch
in the 200V channel) to the appropriate position.
Is the variable
resistor
RVlOl normal?
YES
NO
Replace the RVlOl.
Does
the
display with
LED
change with
the adjustment
of the light intensity
control?
YES
.
~
NO
I
@
Measure the resistance between
[l]
(brown) and
@]
(orange)
of
J201
with a multimeter.
Normal if the
resistance
value
varies
smoothly
from 0 to
2k~
when the light
intensity control lever is
slid.
Abnormal if not.
~
'
Proceed the work according to
"No. J -7
4, Power Supply,
[]] "