Xtreme Power Conversion P91 - Page 27

Xtreme Power Conversion Corporaon
P91, TX91, TX91L, TXVR Service Manual
Page 27
Uninterrupble Power Supply
6k Main Power Secon
Circuit Block Checked components Component Type Failure condion
FUSE F3,F4 Fuse Open
Recer Q17, Q18, Q21 SCR A-K Short or open
PFC D33, D35 Diode Short or open
Q22, Q23 IGBT C-E short or open
INV D62, D52 Diode Short or open
Q7, Q8, Q9, Q10 IGBT C-E short or open
STS Q1, Q2, Q3, Q4 SCR A-K Short or open
SPS-Charger Secon
Circuit Block Checked components Component Type Failure condion
D2, D3, D7, D8, D11 Diode Short or open
Q1, Q2 MOSFET D-S short or open
IC1 Power IC I-O short or open
Others Q28 MOSFET D-S short or open
F1 Fuse Open
REC1 Recer Bridge Short or open
Q6, Q15, Q28 MOSFET D-S short or open
D8, D16, D13, D7, D17,
D18 ,D33
Power Diode Short or open
U1, U4 Power IC I-O short or open
U9, U10 Power Control IC Vcc short to GND
Note: If the fuse is in “open” status, don’t replace the fuse only. In most of cases, open fuse is caused by other
failed components. Therefore, before restarng the UPS, you must nd all failed components and replace them.