HP 9825A - Page 24

5-8 9825AiB Diagnostics
o Key Switch Test
The following display and printout should be seen.
Check the keys for proper operation by pressing each key as it is called for by the
display. Remember to press @ before pressing 0. Leave shift key locked
until
display reads
Press
8 (to unlock shift) before pressing 0 .
The key sequence called for by the display is shown below.
Start
c-\-"m.~'''-----, ("'~"I ,-U~~
888B 88 8BBa GJQJGJGJGJC5d~
<;; r---- ceAA",," ~ ~
888B 88 8B88 GJGJGJGJ~~
<;;
QQwwmmmmmwwG 8@80Q
~8 0 0 0 8 8 8 8 0 0 c=J 8 (0 8 0 0.
~0000000080Q 0800Q
<;;800880000uCD8 (118088
<;;( ) 8 ~~ 8 8 0 0 8
End
An error message will be printed if
• the wrong keys are pressed four times In succession.
• the correct key fails to operate properly.