IBM 5280 Manual page 241

8
2
COMMUNICATIONS MAP
COMM PROBLEMS
PAGE 3 OF
4
002
- Run the MDI several times to
show up intermittent problems.
Does the MDI run without error?
Y N
003
- Correct any problems indicated
by MDls.
004
Is the DDSA line adapter card
installed?
Y N
OOS
- Probe
A-D7B04, '-
Rate
Select'.
- For full rate the lights will
be:
Up light: Off
Down light: On
-
For half rate the
l~ghts
be:
Up light: On
Down light: Off
Are the lights correct?
Y N
006
will
- Defective communications MPU
card (A-ES)(MIM 811).
C D
If a 'Ros Patch' cable is
connected to the card,
GO TO MAP 0600,
ENTRY POINT A.
A C D
2
007
MAP 301S-3
Probe A-D7B13, '- Data Set
Rea dy' .
Up light: Off
Down
light: On
Are the lights correct?
Y N
OOS
- Defective communications
MPU card (A-ES)(MIM 811).
If a 'Ros Patch' cable is
connected to the card,
GO TO MAP 0600,
ENTRY POINT A.
009
GO TO MAP OSOO,
ENTRY POINT A.
010
GO TO MAP 0800, ENTRY POINT A.
011
The
9
MHZ oscillator
is
essential to the communications
MDI routines because it is used
for timing. If the oscillator
is not active, the diagnostiC
routine will not end.
- This problem is not detected by
any diagnostic.
- Probe A-ESBOS '9 MHZ'.
Up light: On or Pulsing.
Down light: On or Pulsing.
Are the lights correct?
Y N
ECS40874 PECS397S7
4 4
E F
MAP 301S-3