IBM Nways 2216, Service And Maintenance Manual

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MAP 0610: Service Terminal Display Unreadable
Symptom Explanation Conditions That Could Cause This Symptom
While you are diagnosing a
problem, a terminal attached to the
service port of the 2216 displays
random characters instead of
readable text.
¹
Incorrect configuration setting of the terminal or 2216
service port.
¹
Incorrect terminal/device (ac) grounds.
¹
Defective, incorrectly shielded, or incorrectly grounded
EIA 232 cable between the terminal and the 2216.
¹
Defective terminal or terminal emulator.
¹
High ambient electromagnetic interference (EMI) levels.
¹
Power line disturbances.
¹
Defective 2216 system board.
001
Does the 2216 go to the active state within 2 minutes of resetting or powering
on?
(Active state is indicated by the green system LED on and the yellow system
LED off.)
Yes No
002
Go to Step 001 on page 1-5
003
Go to Step 004
004
– Press the service terminal break key sequence and press Enter.
You should try this a number of times before proceeding.
A typical terminal break key sequence is Alt-b.
– Press Ctrl-p at the service terminal.
Is a readable message displayed on the service terminal?
Yes No
005
– Go to Step 007 on page 1-11
006
– Go to Step 010 on page 1-11
1-10
2216 Maintenance Manual