Xtreme Power Conversion Corporation
M90 & M90L Service Manual
Page 2
Uninterruptible Power Supply
Table of Contents
General Information.................................................................................... 4
Getting Started................................................................................................................................4
Important Safefty Instructions.........................................................................................................4
Electronic Specifications..............................................................................5
Environmental Parameters..............................................................................................................6
Functional Block...........................................................................................7
Working Pricipal of the Major Functional Block..............................................................................8
Switch Power Supply......................................................................................................................9
PFC/Booster....................................................................................................................................9
Inverter............................................................................................................................................9
Charger..........................................................................................................................................10
EMI Board......................................................................................................................................10
Function Explanations for Each PCBA..........................................................11
PFC Board (Power Factor Correct Board).......................................................................................11
INV Board (Inverter Board)............................................................................................................11
CNTL Board (Control Board)..........................................................................................................11
COMM Board (Communication Board)...........................................................................................11
IPOP Board....................................................................................................................................11
Pre-charger board.........................................................................................................................11
Parallel board................................................................................................................................11
Panel Main/LED/key board............................................................................................................11
EMI board......................................................................................................................................12
SPS board....................................................................................................................................12
STS main board..............................................................................................................................12
Interface board..............................................................................................................................12
Function Flow Chart...................................................................................12
Power on Mode.............................................................................................................................12
Standby Mode...............................................................................................................................13