IBM 5280 Manual page 55

F G H
222
BASE ~lAP
PARITY CHECK
PAGE 3 OF
4
010
Defective Diskette/Main MPU
car d (A- C
1) (
M
I
M
303).
If a 'Ros Patch' cable is
connected to the card,
GO TO MAP 0600,
ENTRY POINT A.
011
GO TO STEP 012,
ENTRY POINT B.
012
(ENTRY POINT B)
- Power Of-f.
Check the control line(s) that
match the probe light condition
for a ground.
- Use the C.E. Voltmeter set to
the RXI range.
Connect the C.E. voltmeter to
the probe point for the failing
control line(s).
Does the meter have a
5
ohm or
less reading?
Y N
013
Power Off.
Remove the following feature
MPU card(s) (if installed)
(MIM 501).
Feature
Location
Printer A-D5
Communications A-E5
Power On.
Does Power On Checkout fail with
a Parity Check?
Y N
D J K L
2
NAP
0532-3
014
- Install the feature MPU
card(s), one at a time,
until the error ocurrs.
If a 'Ros Patch' cable is
connected to the card,
GO TO MAP 0600,
ENTRY POINT A.
015
Defective Diskette/Main MPU
card (A-Cl) nlIM 303) or the
Keyboard/Display MPU card
(A-A 1) nlI M 200).
- If
a 'Ros Patch' cable is
connected to the curd,
GO TO f'lAP 0600,
ENTRY POINT A.
016
- Use MIM 531 for the failing
line net.
- Remove all cards in the net,
one at a time, until the meter
reading is 100 ohms or more.
If all cards have been
removed, and the meter reading
is still zero, check the logic
board for a ground.
017
Defective Feature Main Storage
card (A-B5) (MIM 403).
- - - - - OR - - -
Defective Diskette/Main MPU card
(A-Cl) (MIM 303).
If a 'Ros Patch' cable is
connected to the card,
GO TO MAP 0600, ENTRY POINT A.
ECS40S74 PECS397S7
J
K L MAP 0532-3