Anschutz Gyro Compass Standard 20 Service Manual |link|
If repeaters lag or oscillate, the manual guides you to:
The Standard 20 Service Manual outlines a strict sequence for putting the equipment into operation: Gyro Compass Standard 20 Service Manual | PDF - Scribd anschutz gyro compass standard 20 service manual
: Detailed instructions for fault diagnosis and the exchange of critical components like the gyrosphere or electronic boards. If repeaters lag or oscillate, the manual guides
The is a comprehensive technical document designed for the installation, maintenance, and shipboard repair of the Raytheon Anschütz Standard 20 gyro compass system. It serves as a vital resource for qualified personnel to ensure the system accurately ascertains true north for ship navigation. Core Manual Contents The manual typically covers several key technical areas: Core Manual Contents The manual typically covers several
Most "wandering north" errors are not the gyro; they are the losing sync. The manual provides the oscilloscope patterns for the pick-off coils and the exact voltage readings for the control amplifier (typically 20V AC for excitation). Without these numbers, you are just swapping boards randomly.
If you open a hydraulic damping system or a mercury gyro without the manual’s bleeding sequence, you introduce air bubbles. The Standard 20 service manual walks you through the —a ritual that requires patience and exactly 30 minutes of settling time.
| Symptom | Immediate Check | Manual Reference Section | Likely Fix | |--------|----------------|--------------------------|-------------| | Heading drifts 1–2°/min | Latitude setting correct? | 4.5.2 (Latitude adjustment) | Re‑enter latitude or check potentiometer | | Alarm “Power fail” | Fuses F1/F2 on PSU | 6.3.1 (Power supply schematics) | Replace fuse, check bridge rectifier | | Repeater stuck at 0° | Slip ring continuity | 5.2.1 (Slip ring cleaning) | Clean with fine emery cloth, re-tension brushes | | Gyro motor hot (>65°C) | Bearing play measured? | 3.4 (Gyro motor overhaul) | Replace bearings, adjust preload | | No heading output on radar | NMEA signal level | 6.4.2 (Output driver board) | Replace RS422 line driver IC |