User Manual – Rev BE    AMETEK Programmable Power 
MX Series  236 
7.4  Advanced Troubleshooting. 
WARNING:  Do not connect 400-480V into the 208-240V unit, the result 
could be a severely damaged unit. 
 
CAUTION:  VOLTAGES UP TO 480 VAC AND 450 VDC ARE PRESENT IN 
CERTAIN SECTIONS OF THIS POWER SOURCE. 
 
WARNING:   THIS EQUIPMENT GENERATES POTENTIALLY LETHAL 
VOLTAGES. DEATH ON CONTACT MAY RESULT IF PERSONNEL 
FAIL TO OBSERVE SAFETY PRECAUTIONS.  DO NOT TOUCH 
ELECTRONIC CIRCUITS WHEN POWER IS APPLIED 
7.4.1  Switch Off Unit 
Switch off the unit at the circuit breaker on the front panel as well as removing 
the input power from the unit. 
WARNING:  Wait 10 minutes for all internal capacitors to discharge. 
7.4.2  Removing Covers 
Remove the screws securing the front cover and remove it. 
Remove the screws securing the top cover and remove it. 
7.4.3  Initial Inspection 
Make a visual inspection of the unit and ensure all the connectors are properly 
mated and there are no loose wires. 
7.4.4  Fuse Check 
Using an ohmmeter, check input fuses F1, F2 and F3 for continuity.