IBM 5280 Manual page 117

K L M
4 4 4
DATA ENTRY MAP
A-El KEYBOARD
PAGE
5 OF 6
018
- Use MIM 227 to trace the '+
Break Code Keyboard A or B'
line for opens or grounds.
- - - - OR
- Defective
Adapter Card
501).
019
Data Station
(A-El) (MIM
GO TO THE 5281 OR 5282 DATA
STATION DATA ENTRY MAP 1000,
ENTRY POINT A.
If the failure is not
isolated by the Data Station
MAP's, replace the Data
Station Adapter Card (A-El)
(MIM 501).
020
- Power off.
- 'IPL' Diagnostic Diskette 1
from Data Station 0 (MIM 941).
Do not use the current
definition.
- Select a single partition.
- Select 6 lines.
Load 'DCP' (MIM 951).
Select and run MDI 1070 (MIM
961) •
NOTE:
The system must be dedicated to
maintenance at this time.
Was the failure isolated by MDI
l070?
Y N
6
021
(ENTRY POINT B)
Is this a speaker failure only?
Y N
N P
Q
P Q
MAP 1021-5
022
- Defective
Adapter Card
501 ) .
Data
(A-El)
Station
(MIM
023
- Probe the '100 Hz Clock'
at A-E2DI3 (MIM 531).
Up light: On
Down light: On
Are the lights correct?
Y N
024
- Suspect an open
'100 Hz Clock'
531 ) •
025
net on
line
line
the
(MIM
- Probe A-EI-TP7, ' - Click
Keyboard A', or A-EI-TP3, ,-
Click Keyboard
B'
(MIM 201,
203, 227).
Up
light: On
Down light: Pulses with a
key pressed.
Are the lights correct?
Y N
EC840874 PEC839787
6 6
R
5
MAP 1021-5