YASKAWA YASNAC i80 Maintenance Manual page 199

(3) Checking Functions After Replacement
(a) Check that +5V, +12V, and +24V outputs are not
shorted due to overloading.
(b) Apply the first power and second power again and
check that no alarm occurs.
(c) Check that switches on the machine control panel
can be operated.
6.2.1.4 9" MONOCHROME GRAPHIC CRT UNIT (MDT948-3B)
Removal
Check that AC input power is not supplied [the
(a)
SOURCE indication lamp (green ) of the power unit
is off], then pull out the cable connected to CNB of
model JANCD-FC900B.
Loosen the mounting screws and remove CRT from
(b)
the control panel.
(2) Installation
(a) Check the model and REV number of the replacement
module for consistency.
(b) Insert the cable to the original position.
(3)
Checking Functions After Replacement
(a) Check that +5V, +12V, and +24V outputs are not
shorted due to overloading.
(b) Apply the first power and second power again and
check that no alarm occurs.
(c) Check that the brightness and contrast of the CRT
are normal.
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