1·1 CONFIGURATION OF SERVICE MANUAL
This manual is a maintenance guide for model CDU31A
SECTION 2 describes disks and tools necessary for
SECTION 3 provides fault diagnostic procedures that may
require spare pans or some adjustments.
The overall check after removal and adjustments will be
included in this section.
and 5 cover parts
SECTION 6 consist of circuit diagrams, ass'y drawings,
and parts lists.
As the laser beam used in this drive is harmful to
the eyes, do not attempt to disassemble the
cabinet. Refer servicing to qualified personnel
This CD-ROM drive is classified as a CLASS
PRODUCT label is located on the case.
1 ·3 PRECAUTIONS
Avoid placing the drive in a location subject to:
This drive can be used horizontally only.
Do not move the drive while it is operating. Doing so
may cause a malfunction to occur.
A void exposing the drive to sudden changes in
temperature. This may cause condensation to collect
inside the drive. If the ambient temperature should
suddenly rise while the drive is turned on, wait at least
one hour before turning off the drive. If you attempt to
operate the drive immediately after a sudden increase
in temperature, a malfunction may occur during
Keep the original packing materials to facilitate
transporting the drive.
Always remove the disc before moving the drive.
After removing the drive from the computer, repack
the drive into its original packing.
CDU31A series is a drive unit for CD-ROM (Compact
Disc Read-Only Memory) discs, which store as much
as 540 Mbytes of digital data.
The drive unit offers the following features:
- 5.25 inch half-height drive form factor.
- Audio output to enable Audio CD playback.
-Audio channel selectable by software (stereo,
monaural, reverse, etc.)
- Fast access time providing high-speed read
- Real time layered error correction.
- Emergency eject function for manual disc
-CD-ROM XA, CD Bridge disc and CD-I disc
-To read data reading of the data stored on a disc,
install the appropriate application software.
-To read data from CD-ROM discs with the High
Sierra Group (HSG) or IS0-9660 logical format,
you can use Sony OPA-474 series MS-DOS
CD-ROM Extensions. This software extends
MS-DOS*. It is designed for use on IBM
registered trademark of Microsoft
IBM PC, PC/ST, and PC/AT are registered trademarks
of International Business Machines Corporation.