YASKAWA YASNAC i80 - 9 CRT Screen Is Dark

4.3.11 9“ CRT SCREEN IS DARK
Cause of Trouble
Power voltage is too
low.
Escutcheon is dirty.
Brightness is not
properly adjusted.
Hardware failure
-.
Table 4.40 9“ CRT Screen is Dark
Check Method
}heck it with CN13 on the model JANCD-
~C900B board or CN28 on the model JANCD
‘C903 board at rear side of 9“ CRT unit.
8
40V +51
2
5 02, V +;4 3
CN 13 (Model JANCD-FC900B board)
Solution
● If the voltage drops at
power cable, replace the
cable.
● If model CPS-12N or
CPS-16F output voltage
is also low, it may be
caused by failure of
model
CPS-12N or CPS-
16F.
Contact your
YASKAWA
representative.
CN 28 (Model JANCD-FC903 board)
I
Zheck visually if the surface of escutcheon
Clean up CRT display and
~nd the section between escutcheon and CRT
escutcheon.
sre dirty.
1
COiTRAST
{Trouble other than above)
[Do not perform setup
change of CRT as a rule. ]
Perform adjustment with
VR1 (BRIGHT) on model
JANCD-FC900B board.
Replace CRT unit or
model JANCD-FC900B
board. Contact your
YASKAWA
re~resentative.
123