IBM 5110 Series Maintenance Analysis Procedures page 130

A
M
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PROCESS CHECK MAP
PAGE 8 OF 26
081
- Power down.
- Exchange M2 with M4.
- Power up. Wait 25 seconds.
Did either LOA DO or CLEAR WS (spelled
correctly) appear only once on one and only
one line of the 5110 display?
Y N
082
Is the machine at halt H?
Y N
083
Bad read/write storage card is now at M2.
084
-Switch the DISPLAY REGISTERS switch to
DISPLAY REGISTERS.
-Record RFLO.
(See DISPLAY REGISTERS in the Diagnostic
Aids section in the MIM).
-Switch the DISPLAY REGISTERS switch to
NORMAL.
Is RFLO between or including 0000 and
3FFF?
Y N
085
Bad J2 (processor) card (see MAP 050 for
jumpering).
Bad L2 (exec ROS) card (see MAP 050 for
jumpering).
Bad H2 (base I/O) card.
Bad G2 (display) card (see MAp· 050 for
jumpering).
086
A A
J L
7 7
MAP 0420-8
088
- Power down.
-Exchange M2 with M4.
- Power up. Wait 25 seconds.
Did either LOADO or CLEAR WS (spelled
correctly) appear only once on one and
only one line of the 5110 display?
Y N
089
-Switch the DISPLAY REGISTERS switch
to DISPLAY REGISTERS.
- Record RFLO.
(See DISPLAY REGISTERS in the
Diagnostic Aids section in the MIM).
-Switch the DISPLAY REGISTERS switch
to NORMAL.
Is RFLO between or including 0000 and
3FFF?
Y N
090
Bad read/write storage card is now at
M4.
091
Bad J2 (processor) card (see MAP 050 for
jumpering).
Bad L2 (exec ROS) card (see MAP 050 for
jumpering).
Bad H2 (base I/O) card.
Bad G2 (display) card (see MAP 050 for
jumpering).
092
The trouble probably was a bad card
connection.
Bad read/write storage card is now at M2. 093
087
The trouble probably was a bad card connection.
Is the recorded RFLO between or including
0000 and 3FFF?
Y N
1
o
9
A A
N P
01JAN79
EC 836600 PEC 835541
MAP 0420-8