Rk05 Quarterly Procedure

This document outlines the quarterly maintenance procedure for cleaning and verifying the alignment of RK05 Disk Drives within the Fuel Handling system.

The procedure includes the following key steps:

• Cleaning and Inspection: Involves obtaining work authorization, halting the processor, cleaning the prefilter, inspecting the drive interior for damage or wear, and examining the read/write heads for contamination.
• Power Supply Checks: Verifies that the +5.0 Vdc, +15.0 Vdc, and -15.0 Vdc regulators are operating within specified tolerances, checking for ripple, and performing adjustments as necessary.
• Head Alignment Checks: Describes the process for checking and aligning the top and bottom heads to ensure the readback signal is within 6% error, using an oscilloscope and the ALIGNX diagnostic program.
• Index/Sector Timing Checks: Ensures the timing pulses occur within defined tolerances, with provisions for adjusting timing on the PCB or relocating the sector transducer if required.

The document concludes with post-maintenance requirements, such as reinstalling disks, restarting the computer systems, and filing necessary reports. It also provides reference attachments including a diagram of the G180 PCB and a backplane layout.