C-Plath Gyro Bearing Repeater

This is a tanker. Ship request to replace both port and stbd wing bearing repeaters. Consider very reliable since it has been working for the pass ten years. Checked the bearing repeater by pressing on the sync button. Bearing repeater will spin anti-clockwise for approx. half turn and sync button will blink. Pressing the sync button  again and the bearing repeater will align itself to the correct heading and sync button will stop blinking.
Remember to tape pin 1 and 2 which is the 24Vdc supply. Disconnect the 12 pins from the old bearing repeater and reconnect the new 12 pins. Remember to connect from pin 12, 11, 10....until 1, 2. As try to connect 24Vdc supply last as it will start up the bearing. You will get to see a little spark when connect pin 1 and 2 if you did not switch off the breaker. This is a short cut method if you are running out of time, but was not recommended as it will sometime cause shorting to the equipment. Also remember to connect pin 7 to pin 2.(I.E. Short circuit CP/NMEA to 0V)
After replacement, found the dimmer pot for both port / stbd bearing repeater had jammed and cannot be turned
in either direction. So need to replaced connection box in order to make it work properly. It was a 10Kohm potmeter where LED light on the surrounding of bearing repeater was situated to light up the repeater at night for easy visibility.