Crt Anode Discharge Procedure - IBM 6360 Product Support Manual

CRT Anode Discharge Procedure
1. Turn the system power off and dis-
connect the AC line cord from the
wall outlet.
2. Wait 15 seconds.
3. Perform the rear cover removal.
4. Perform the low voltage power sup-
ply removal.
5. Use an alligator clip to connect
the plug end of a Fluke* meter
lead to the display mainframe.
6.
Push the probe end of the meter
lead under the boot on the anode
••
Visually ensure that the
probe tip touches the metal prongs
on the anode lead. (See
Figure
4-11.)
Figure 4-11. Anode Boot
7 . Remove the probe from the anode,
and ensure that the anode boot is
securely seated against surface of
the CRT.
CAUTION:
Even though you use th is saf.ety pro-
cedure, if the anode lead is discon-
nected from the CRT, the CRT may
slowly recharge.
When working near the CRT with the
anode lead disconnected, make sure you
discharge tqe anode hole of the CRT to
the display mainframe:
•
•
•
Every 5 to
10
minutes
Before connecting the anode lead
to the CRT
When installing a new mainframe
assembly or high voltage power
supply.
4-10
IBM Displaywriter PrOQuct Support Manual