Field Service Tech Manual

This document contains detailed procedures for the maintenance and calibration of DECtape systems. It covers:

• Skew Adjustment Procedures: Detailed steps for testing skew with both zero-skew and non-zero-skew tapes, along with deskewing methods involving shimming.
• Maintenance: Instructions for cleaning tape heads, guides, and tapes.
• Calibration: Procedures for calibrating the system using switches and potentiometers to compensate for internal drift and phase shifts.
• System Configuration: Information on switch settings (S1, S2, S3) for different tape transports (TU55/TU56) and vendor-specific pin assignments.
• Technical Data: Includes a parts list, signal diagrams (Figure 1 and 1A), and an electrical schematic for the G500 Skew Tester.