Control Data Corporation CDC CC63X Hardware Maintenance Manual page 60

I
• SERIAL PORT A and B - If the dual serial port board is
installed, the message PORT A (or B) RUNNING will be
displayed. A total of 128 characters from 00
hexadecimal to 7F hexadecimal will continuously be
looped back. However, these actions require that the
TEST/NORMAL switch on the dual serial port board be'
set to TEST prior to enabling the rear-panel TEST
switch. Otherwise, an invalid error will occur. If
an error occurs, the word RUNNING changes to FAIL.
To exit test 3, the operator must position the TEST and
TEST/NORMAL switches for normal operation and press the RESET
switch.
CUSTOMER-PERFORMED MAINTENANCE
The following suggested customer-performed maintenance steps
should help to minimize field trips by verifying correct CRT
alignment and related operations of the terminal. General
inspection of the terminal, including proper seating of cable
connectors, should also be made.
Remove power from terminal (procedure 1) and clean as follows:
6-10
CAUTION
Do not use solvents to clean key-
board. Solvents can cause defective
keyswitch operation and damage
keycaps.
The following agents may be used for
exterior cleaning surfaces including
key tops. Only these cleaning agents
are recommended: any others should
not be used. Place agent on cloth
before application to avoid dis-
coloring runs.
Bafix Germicidal Cleaner (Hysan)
Tide Detergent (2% in H 20 solution)
Joy Detergent (1% in H 2 0 solution)
Formula 409 Household cleaner
Windex with Ammonia
62940034 E
\
"-.
-'