IBM 8270, Инструкция по установке и обслуживанию

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Status LEDs
The Token-Ring Processor card has three status LEDs. See Figure 1-6 on
page 1-6 for the locations of the LEDs.
Table 1-2. Status LEDs
Function
(color) Label State Meaning
Power
(green) | On The Token-Ring Processor Card is
receiving power from the 8270 backplane.
Off The Token-Ring Processor Card is not
receiving power from the 8270 backplane.
OK
(green) OK On The 8270 is working correctly.
Off The 8270 is not working correctly.
Blinking Diagnostics are in progress.
Fault
(amber) none On A diagnostic failure has occurred. The
Token-Ring Processor Card is bad and
should be replaced.
Off The 8270 is working correctly.
Blinking Diagnostics are in progress.
Status Display
The 4-character alphanumeric display provides additional status information
concerning the state of the 8270. This includes the power supplies, the Token-Ring
Processor Card, any UFCs, and any cooling fans. The messages are decoded as
follows:
¹
Power-On Self Test messages
When Power-On Self Test is running, the first display character is T, followed
by a 3-digit numeric code identifying the test in progress. If the test fails, the T
character changes to E and the test stops.
¹
OK
This message appears for 2 minutes after a successful Power-On Self Test to
indicate that the 8270 is working correctly.
¹
Non-test messages
– The first 2 display characters identify the system component:
F1 Fan 1
F2 Fan 2 (8270-800 only)
P1 Power supply 1
P2 Power supply 2 (8270-800 only)
PC Processor card
Sx UFC in slot x
!A Fuses 3 and 4 (8270-800 only)
Note: Fuses 3 and 4 control power to the 8270-800 Token-Ring
Processor Card. If either fuse 3 or fuse 4 fails, the Token-Ring
Processor Card becomes inoperative and cannot display status
messages.
Chapter 1. Physical Characteristics and Features
1-7