This article is adapted from Section 7.3 of the User Manual for the Pine Modulated Speed Rotator (MSR).
Related Links: MSR User Manual, MSR Rotator Support Page, Pine Research Instrumentation
The rotator control unit has two internal power supplies. One of these power supplies is 
WARNING:
Risk of electric shock.
Disconnect power before servicing the control unit.
The shaded region in the figure above shows the location of the high voltage power entry and the two internal power supplies.
AVERTISSEMENT:
Risque de décharge électrique.
Déconnectez l’alimentation avant de procéder à l’entretien de l’unité de commande.
La région ombragée de la figure (ci-dessus) présente l’emplacement de l’entrée de puissance à haute tension et des deux alimentations internes.
In the (rare) event that it is necessary to replace one of the internal power supply units, it is important to carefully identify which type of power supply is to be replaced. First, determine which supply (
Next, carefully examine the power supply to determine which brand of power supply is to be replaced. Early rotators (prior to October 2014) use power supplies manufactured by Astrodyne, FranMar International or TDK Lambda. Later rotators (after October 2014) use power supplies manufactured by XP Power. Depending upon when the rotator was manufactured, choose the appropriate replacement part shown below.
WARNING:
Risk of electric shock.
Disconnect all power before servicing the rotator.
AVERTISSEMENT:
Risque de décharge électrique.
Déconnectez toutes les sources d’alimentation avant de procéder à l’entretien du rotateur.
WARNING:
Rotating shaft. Entanglement hazard.
Turn off the power to the rotator and disconnect the power cord from the power source before continuing with this procedure.
AVERTISSEMENT:
Arbre en rotation. Danger d’enchevêtrement.
Éteignez le rotateur et débranchez le cordon d’alimentation de la source d’alimentation avant de poursuivre cette procédure.
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