IBM 5110 Series Maintenance Analysis Procedures page 133

(
"._,
.... \
- y
c
B
C
1
o
PROCESS CHECK MAP
PAGE 11 OF 26
119
-Power down.
- Exchange N4 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?
V N
120
-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 4000 and
7FFF?
V N
121
Bad J2 (processor) card (see MAP 050 for
jumpering).
Bad H2 (base I/O) card.
Bad L2 (exec ROS) card (see MAP 050 for
jumpering).
122
Bad read / write storage card is now at M4.
123
The trouble probably was a bad cable
connection.
B
B
1
o
MAP 0420-11
124
- Power down.
-Exchange M4 with N2.
- 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?
V N
125
-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 the RFLO between or including 4000 and
7FFF?
V N
126
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).
127
Bad read/write storage card is now at M4.
128
The trouble probably was a bad card connection.
01JAN79
EC 836600 PEC 835541
MAP 0420-11