Control Data Corporation CDC CC63X Hardware Maintenance Manual page 87

c)
Execution
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62940034 E
All seven subtests of test 3 require operator or
CE intervention. This includes sUbtest execu-
tion steps and/or subtest result evaluation. The
steps that follow provide the intervention needed
to successfully execute test 3. Use SAM 6 to
isolate the failing component for any incorrect
subtest result.
1. Alignment Raster - Verify the aligrunent
pattern aligns with notches in the bezel
assembly (all 4 corners) as shown in figure
6B-3.
~ ~
:I'/q///////////////h'l"/////////////////'~//' I~
BE Z E L ASSE M B L Y
~ ~ 111
'~ ~
% %
~ ~
ALIGNMENT PATTERN
~ ~J+---II
DEVELOPED BY TEST 3
~ ~
~ ~
~ ~
~ ~
ALIGNMENT NOTCHES
~ ~ ~CUT
IN BEZEL
,/,//~//////////////////////////////////./,.~///,
,
~ ~
04355-1
Figure 6B-3. Aligrunent Raster
2. ROM Character Generator - Verify the seven
lines of code and characters match display
shown in figure 6B-2.
3.
Attribute Test - Verify the following for each
word in this line:
• BLINK is blinking.
• DIM is dim.
• UNDERSCORE is underscored.
• INVERSE appears in reverse video.
• BLANK does NOT appear.
4. Keyboard Test - As key is pressed, a hex code
received from the key will be displayed after
the words KEYBOARD TEST. Two codes will be
displayed, one when the key is pressed (2 7
clear) and one when the key is released (27
set) - the codes are not ASCII. The following
is an example for the upper left most (PRINT)
key:
• When pressed - 10
• When released -
90
6B-5
I