IBM 5110 Series Maintenance Analysis Procedures page 171

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KEYBOARD MAP 0600
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0200
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0300
A
0845
A
0900
A
001
(Entry Point A)
Can you make the machine fail?
Y N
002
(Entry Point B)
001
001
001
001
Go to the FREELANCE TROUBLESHOOTING
GUIDE in the Diagnostic Aids section of the
5110 MIM.
003
Make the machine fail.
Is the PROCESS CHECK light on?
Y N
004
-Calibrate the multimeter (see MIM 270).
-For the probe points see MIM 206 and 255.
- Measure +8.5 Vdc and +5.0 Vdc at the
keyboard PC board with referance to N2D08
(gnd) on the A 1 board.
Are both voltages in tolerance (+7.8 Vdc to
+9.3 Vdc and +4.6 Vdc to +5.5 Vdc)?
Y N
©
Copyright IBM Corp. 1979
722
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0420
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01JAN79
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EC 836600 PEC 835541
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