IBM 8270, Инструкция по установке и обслуживанию

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Note: Throughout this manual,
segment refers to a single cable or interconnected
cables between an 8270 Token-Ring port and the device at the other end.
Table 5-1. Symptom, LED State, and Recommended Procedure
Symptom and LED State Action:
(8270-600 Only) The Fault (unlabeled) LED (amber) and
the OK LED are off. The fan is not running. Go to “Procedure A” on
page 5-3
(8270-800 Only)–Both the AC OK and DC OK LEDs are
off. This applies to either or both power supplies if the
second power supply is installed. Go to “Procedure A” on
page 5-3
(8270-800 Only)–The AC OK LED is on and the DC OK
LED is off. This applies to either or both power supplies
if the second power supply is installed. The power supply is defective.
See “Obtaining Service” on
page 5-6.
The Fault (unlabeled) LED (amber) is on or the OK LED
is off. Go to “Procedure B” on
page 5-3
None of the devices connected to the 8270 can
communicate, the Fault (unlabeled) LED (amber) is off,
and the Power (|) LED is on. Go to “Procedure C” on
page 5-4
A single device connected to the 8270 is having trouble
communicating. Go to “Procedure D” on
page 5-4
A UFC’s Fault LED (amber) is on or a device connected
to a UFC is experiencing problems. Refer to service and
troubleshooting information in
the UFC documentation.
Procedure A
Use this procedure if all of the LEDs are off:
Step 1. Verify that the ac power outlet to which the 8270 power supply is
connected is active. If an uninterruptible power supply (UPS) is being
used to provide ac power to one or both supplies, ensure that the UPS is
working correctly.
Step 2. Verify that the line cord is correctly installed.
Step 3. (8270-800 only)—Verify that the power supply is correctly installed in the
chassis.
Step 4. If all of the preceding conditions are satisfied, the power supply is
defective. See “Obtaining Service” on page 5-6.
Procedure B
Use this procedure if the Fault (unlabeled) LED (amber) is on:
Step 1. Reset the 8270 by disconnecting the line cord from the ac outlet, waiting
10 seconds, and reconnecting the line cord to the ac outlet. If the
problem is corrected, resume using the 8270.
Step 2. If you have just downloaded new microcode, clear NVRAM and reset the
8270 using instructions found in Planning, Configuration, and Operation.
Note: Clearing NVRAM erases all configuration parameters. If you are
using the TokenPipe feature, be sure to disconnect the affected ports or
disable them on the Port Configuration panel and reset the switch
before
clearing NVRAM. If you are using the Spanning Tree option, it will be
turned off and port costs and priorities will be lost, which can result in
Chapter 5. Troubleshooting and Service
5-3