IBM 5110 Series Maintenance Analysis Procedures page 177

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KEYBOARD MAP
PAGE 7 OF 7
067
-Press the HOLD key.
- Hold the shift key down and press the.
(peroid) key on the numeric keyboard.
Go to Page 1, Step 002,
Entry Point B.
068
Go to Page 4, Step 032, Entry Point C.
069
- Press the A key.
Is an A displayed?
Y N
070
Bad key module (see MIM 253).
071
Bad L2 (exec ROS) card (see MAP 050 for
jumpering).
Bad H2 (base I/O) card.
Bad J2 (processor) card (see MAP 050 for
jumpering).
Bad keyboard PC board (see MIM 251).
Check/ replace Z4 (keyboard) cable (see Map
0210 and MIM 206,255).
072
-Probe H2-B04 (+typamatic).
(See appendix B, the general logic probe, in the
5110 MIM).
Is the UP light on?
Y N
073
-Press and hold the A key
-Probe H2-U12 (-keyboard strobe).
Are both lights on and steady?
Y N
A A
Z A B
A Z A A
1 A B
MAP 0600-7
074
Bad H2 (base I/O) card.
075
Bad keyboard PC board (see MIM 251).
Check/ replace Z4 (keyboard) cable (see
Map 0210 and MIM 206,255).
076
Bad H2 (base I/O) card.
077
Go To Map 0420, Entry Point A.
01JAN79
EC 836600 PEC 835541
MAP 0600-7
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