HP 7925D Service Manual page 180

PREFACE
This appendix adds service information for the HP 7925H Disc Drive. In general, the information given
in the main manual is applicable
to
the HP 7925H, with the following exceptions:
SECTION I - THEORY OF OPERATION
• All paragraphs
SECTION II - MAINTENANCE
• Special Test Equipment (paragraph 2-7)
• Preventive Maintenance (paragraph 2-10)
SECTION III - ALIGNMENT AND ADJUSTMENT
• Installing the DSU (paragraph 3-9)
• On-Line Checkout (paragraph 3-20)
SECTION IV - TROUBLESHOOTING
• All paragraphs
SECTION V - REMOVAL AND REPLACEMENT
• Printed Circuit Card Removal and Replacement (paragraph 5-10)
SECTION VI - REPLACEABLE PARTS
• Introduction (paragraph 6-1)
These exceptions are fully described in Parts I through VI of this appendix. In addition, Part VII provides
a description of the HP 7925H recording format and communications protocol. For a detailed description
of the HP 7925H command set, refer to the HP 13365 Integrated Controller Programming Guide, part no.
13365-90901.
A-ii