IBM 5280 Manual page 270

A
3
COMMUNICATIONS MAP
EIA WRAP ERROR MAP
PAGE 8 OF 12
039
- Probe the extra 'Received' line
at probe point A.
Up light: On or PUlsing.
Down light: On or Pulsing_
Are the lights correct?
Y N
1
040
THE SYMPTOMS INDICATE THAT THE
EXTRA 'RECEIVED' LINE IS STUCK
AT ITS ACTIVE LEVEL.
Remove the wrap connector.
Note: The 'Received' line
displayed may change with the
wrap connector removed.
Ignore this byte for now.
- Probe the extra 'Transmitted'
line at probe point F.
Up light: On
Down light: Off
Are the lights correct?
Y N
041
THE SYMPTOMS INDICATE THAT THE
EXTRA 'RECEIVED'
PICKING UP THE
LINE.
- Reinstall the
connector.
LINE IS
'RECEIVED'
wrap
- Probe the extra 'Received'
line at probe point B.
Up light: Off
Down light: On
Are the lights correct?
Y N
o
9
V W X Y
X Y
MAP 3019-8
042
- The logic board is defective.
OR - - - - -
The EIA line Adapter card is
defective (A-D7)(MIM 823).
- - - - - OR - - - - -
Defective communications MPU
card (A-E5)(MIM 811)
- If a 'Ros Patch' cable is
connected to the card,
GO TO MAP 0600, ENTRY POINT A.
043
- Probe the extra 'Received' line
at probe point C.
Up light: On
Down light: Off
Are the lights correct?
Y N
I
044
- The EIA line Adapter card is
defective (A-D7)(MIM 823).
045
- Probe the extra 'Received' line
at probe point D.
Up light: On
Down light: Off
Are the lights correct?
Y N
EC840874 PEC839787 9
9 A
Z A
MAP 3019-8