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DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-1370TAPE (Tape Unit) [G3iV1.1-286]
10
!
WARNING:
DO NOT GET TAPE HEAD CLEANING SOLUTION ON THE
CAPSTAN.
6. With a dry swab, wipe away any remaining residue from the tape head.
Tape Maintenance and Repair Procedures
This section contains commonly used procedures to resolve tape alarms. The
following equipment may be needed to complete these procedures:
■ Tape Cartridges (3)
■ TN774 Tape Drive Circuit Pack (1)
■ TN773 Processor Circuit Pack (1)
■ TN770 Memory Circuit Pack (1)
NOTE:
In the following repair procedures, the term "main tape(s)" is used to refer to
the tape(s) that were physically present in the tape drive(s) at the time the
problem occurred. The "main tape(s)" should not be confused with the term
"backup tape(s)" Backup tapes are physically stored outside of the tape
drive(s). The term "new tape(s)" refers to the three new tapes that you
should bring with you to the customer’s site; these tapes may be needed to
complete the tape maintenance procedures. The new tapes should not
have been used previously in the customer’s system. It is very important
to keep track of these tapes.
1. Check the Error Log for power-related problems and refer to the POWER,
DC-POWER, and CARR-POW Maintenance documentation sections. If no
power errors exist, check the tape drive for power as follows:
■ If there is a problem with the 12V supplied to the tape drive, its
yellow LED will be in a blinking mode. The 12V is supplied by the
631DB or 676B power unit in a multicarrier cabinet system and by a
WP91153 in the single-carrier cabinet system. This problem can
also be caused by a failure in the 984D DC power converter on
TN774 Tape Drive circuit pack.
■ If there is a problem with the five volts supplied to the tape drive,
there is no visible way to determine this except by using the
TN2036 Voltage Range circuit pack (see the "Troubleshooting
Backplane Voltage Problems" section in Chapter 5, ‘‘
Routine
Maintenance Procedures’’ or by using the following procedure:
Insert a tape cartridge into the tape drive. There should be a
spinning noise indicating that the tape drive is doing a short
retension pass. If there is no noise, the power may be
disconnected.