Invalid Disk in the Disk Drive

TASK 31-38-00-810-817-A
Invalid Disk in the Disk Drive

1. Possible Causes

MDDU [1TD]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-38-00-740-002	BITE Test of the Multipurpose Disk Drive Unit (MDDU)
AMM 31-38-22-000-001	Removal of the MDDU
AMM 31-38-22-400-001	Installation of the MDDU

3. Fault Confirmation
Subtask 31-38-00-740-062-A ** ON A/C NOT FOR ALL

A. Do the BITE test of the Multipurpose Disk Drive Unit (MDDU) AMM 31-38-00-740-002.

4. Fault Isolation
Subtask 31-38-00-810-066-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message DISK/MDDU(1TD):
(1) Eject the disk from the disk drive of the MDDU.
(2) Put the correct disk into the disk drive, the label in the forward direction.
(3) If the fault continues:

replace the MDDU [1TD] AMM 31-38-22-000-001 and AMM 31-38-22-400-001.

Subtask 31-38-00-740-063-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:30:09 UTC