Tasks
Maintenance
Routine
Product
Information
This
About
1. Verify mate moving head disk (MHD).
2. Check MHD light-emitting diodes (LEDs).
3. If in service, remove MHD from service.
REMOVE 1G-BYTE MHD FROM SERVICE PROCEDURE:
3.1. At MHD under test, operate ROS/RST switch to ROS position.
Response: The Green ROS LED lights.
3.2. Wait for the unit to go out of service.
Response: The Amber OOS LED lights.
The Green RQIP LED lights.
NOTE:
If the green RQIP LED begins to flash and then
extinguishes, the request to go out of service was
not accepted by the system. Check the receive-
only printer (ROP) or maintenance TTY (MTTY) for
messages.
3.3. STOP! YOU HAVE COMPLETED THE REMOVE 1G-BYTE MHD FROM
SERVICE PROCEDURE.
The Green RQIP LED extinguishes.
RMV COMPLETED message received at the ROP
and/or MTTY.
Maintenance terminal display page unit indicators show
OOS or OOS MAN.
4. Test MHD power alarms.
5. Restore power to MHD.
Double bold lines
indicate start of
subprocedure.
Double narrow lines
indicate end of
subprocedure.
Bypassing
Subprocedure
of
Sample
1.
Figure
xviii
254-303-101
1999
April
3
Issue
Summary of Contents for Lucent Technologies 3B21D
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