Medium Optical Disk Library Service Manual

This document is the Medium Optical Disk Library Service Manual (Part Number: EK-MOL20-SV.B01) by Digital Equipment Corporation, published in October 1993. It is primarily intended for service personnel and technicians.

The manual provides comprehensive information for the RW510, RW511, and RW530 optical disk libraries, which are optical disk jukeboxes containing two multifunction optical drives with storage for 32, 5.25-inch optical disks (20.8 Gbytes for RW510/511, 41.6 Gbytes for RW530).

Key areas covered include:

1. Introduction: Provides an overview of the optical disk library's features, configurations (deskside, rackmount), SCSI interface options (single-ended and differential), product matrix, and detailed specifications (performance, physical, environmental, power, service characteristics, and product certifications). It also lists related documents.
2. Environmental/Installation/Preventative Maintenance (PM): Details environmental, temperature, clearance, location, and power requirements. It outlines unpacking and installation procedures, including connecting cables and uninterruptible power supplies (UPS), hardware verification, and instructions for moving the library. It states that no preventative maintenance is required for the library itself, but optical disk cleaning may sometimes be necessary.
3. Product Configuration and Operation: Describes the front and rear panel operations, procedures for setting configurations (e.g., security codes, disk insertion/removal restrictions, SCSI addresses), and host configuration.
4. Troubleshooting/Diagnostics: Offers extensive information on identifying and resolving issues through operation/installation error information, power-on self-tests, optical disk cleaning, using an eject tool, control panel observations, and internal diagnostic utilities. It details hardware error codes and recovery procedures, including the FRU (Field-Replaceable Unit) isolation test sequence and various information logs (error log, move success log, runtime log, odometer).
5. Removal and Replacement: Provides step-by-step procedures for disassembling and replacing field-replaceable assemblies, such as the power supply, autochanger controller PCA, SCSI repeater PCA, MO drives, carriage/picker assembly, motors, leadscrews, mailslot, and interconnect PCA. ESD precautions and required tools are also listed.
6. Theory of Operation: Explains the functional aspects of the autochanger (movements, mechanism), controller PCA, power supply module (AC and DC PCAs), and multifunction magneto-optical drives (controller PCA, servo PCA, mechanism, optical head). It also delves into optical disk layout, error correction mechanisms (slip sparing, replacement sparing, error thresholds), and error detection/recovery processes, including the SCSI interface and command set.
7. Appendices: Contains detailed offline diagnostic information (system error reports, autochanger and drive SCSI-2 error codes), a list of basic supplies and reorderable parts, and instructions for connecting multiple optical libraries.