IBM 5280 Manual page 131

P
4
DATA ENTRY MAP
MSR
PAGE 5 OF 1
(~
026
- Leave the probe connected.
Up light: O-ff
DO~..Jn
1 i ght: On
Are the lights correct?
Y N
027
Defective Diskette/Main MPU
Card (A-Cl) (MIM 303, 501).
If a 'Ros Patch cable is
connected to the card,
GO TO MAP 0600, ENTRY POINT A.
028
- Power off.
- With the CE meter set to the
RXI scale.
Connect the positive lead to
A- B 2 B 02, '1 MHz c 1
0
c k "
and the
negative lead to ground.
Is the meter reading 30 ohms or
above?
Y N
029
Q
Leave the meter connected as
in the previous step.
Use the net list (MIM 531).
Remove each card in the net,
one at at tlme, until the
meter reads 30 ohms or above.
Replace the last card
removed.
If all the cards in the net
have been removed and the
meter reading is still below
30 ohms, suspect a ground on
the Logic Board.
N
Q
4
030
MAP 1030-5
- Defective Disk/Main MPU card
( A- C 1) <f'1I M 303, 501).
- If a 'Ros Patch' cable is
connectpd t~ thp G~~~;
GO TO MAP 0600, ENTRY POINT A.
031
Load 'MSRTEST' from the
diagnostic diskette at the
keyboard station associated
with the failing MSR (MIM 971).
Probe A-B2B07, Extended
Sense Bit' (MIM 531).
- Pass the test card through the
reader several times (MIM 751).
Up light: On
Down light: Pulses
Are the lights correct each time
a test card is passed through the
reader?
Y N
032
- Leave the probe connected.
Up light: Off
Down light: On
Are the lights correct?
Y N
6 6
R S
033
- Defective MSR card (A-Bl)
(MIM 501, 773).
EC8397S7 PECS39661
MAP 1030-5