IBM 5110 Series Maintenance Analysis Procedures page 154

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049
-Remove the cable from the 5110 I/O interface
port. (see MIM 271)
No more than 25 seconds after RESTART is
pressed, the following events should occur:
1. ABCDEFGH appears on the top line of the
5110 display.
2. ABCDEFGHJKLMNP appears on the top line.
3. The top line is cleared and either LOADO or
CLEAR WS appears once on one and only
one line of the 5110 display.
-Press RESTART.
Do all three events shown above occur in
sequence after RESTART is pressed?
V N
050
- Remove the A2 (I/O cable driver) card and
cable.
No more than 25 seconds after RESTART is
pressed, the following events should occur:
1. ABCDEFGH appears on the top line of the
5110 display.
2. ABCDEFGHJKLMNP appears on the top
line.
3. The top line is cleared and either LOADO
or CLEAR WS appears once on one and
only one line of the 5110 display.
-Press RESTART.
Do all three events shown above occur in
sequence after RESTART is pressed?
V N
u
V
051
Bad G2 (display) card (see MAP 050 for
jumpering).
Bad H2 (base I/O) card.
Bad F2 (Common and language ROS) card.
u
V
MAP 0500-6
052
Bad A2 (I/O cable driver) card and cable
assembly.
053
(Entry Point G)
The maximum number of I/O devices that can
be attached to the 5110 is three. If a 5103 is
installed, it has to be the last I/O device in the
string of devices, because it terminates all the
I/O signal lines. If a 5103 is not installed, the
last I/O device must have a cable terminator
installed. If a 5106 is installed, it has to be the
first I/O device in the string of devices.
Was there a 5103 in the string of devices you
disconnected from the 5110 I/O interface
port?
V N
054
Was there a 5106 in the string of devices?
V N
8 7
W X
055
Bad A2 (I/O cable driver) card and cable
assembly in 5110.
Bad 5114 C1 (adapter) card (see MAP 050
before replacing this card).
Check/replace the 5114 internal cables D1
and 03 (see 280 and MAP 0210).
Check/replace the 5114 I/O interface
cable (see 280 and MAP 0210).
01JAN79
EC 836600 PEC 835541
MAP 0500-6