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Twinaxial Workstation
1/0
Processor Problem Isolation
Procedures
TWSC-PIP1
Use this procedure:
• To isolate a failure detected by the twinaxial
workstation I/O processor when no display is
available with which to perform online problem
analysis
If you have a display available, perform online
problem analysis (WRKPRB or ANZPRB com-
mands).
Note: If you are using a PC you must install an
emulation program.
DANGER
To prevent a possible electrical shock
when adding or removing any devices
to or from the system, ensure that the
power cords for those devices are
unplugged before the signal cables are
connected or disconnected. If pos-
sible, disconnect all power cords from
the existing system before you add or
remove a device.
(RSFTD203)
Warning: When instructed, remove and connect
cables carefully. You may damage the connectors
if you use too much force.
1
Ensure that the console is powered on.
Note: Alternative consoles are not sup-
ported for the
9401.
If you have twinaxial cables attached, dis-
connect any devices attached after the
console and terminate at the console.
2
Is the system powered off?
Yes
No
~
Go to step 5 of this procedure.
3
Perform the following:
a. Power on the system (see "Power on"
on page 5-2).
b. Select the IPL type B and mode M (see
"Selecting IPL and Mode" on
page 5-2).
c. Wait for a display to appear on the
console or a reference code to appear
on the control panel.
Does a display appear on the console?
No
Yes
~
If you disconnected any devices
after the console in step 1 of this
procedure, perform the following:
a. Power off the system (see
"Power off' on page 5-2).
b. Reconnect one device.
Note: Ensure that you termi-
nate the device that you just
reconnected and remove the
termination from the previously
terminated device.
c. Power on the system (see
"Power on" on page 5-2).
d. If a reference code appears on
the control panel, go to step
6
of this procedure.
e. If no reference code appears,
repeat steps a through d of this
step until you have checked all
devices disconnected before.
t. Continue to perform the initial
program load (IPL).
This ends the procedure.
4
Does the same reference code that sent
you to this procedure appear on the control
panel?
Yes
No
Go to "Unit Reference Code
Tables" on page 2-3 for this new
problem.
This ends the procedure.
5
Perform the following:
a. Select the I PL type B and mode M (see
"Selecting IPL and Mode" on
page 5-2).
b. Select Function 21 (Bring up DST).
Chapter 3. Problem Isolation Procedures
3-15
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