Xtreme Power Conversion Corporation
E90 Service Manual
Page 45
Uninterruptible Power Supply
PCB static maintenance
PFC inductor board
NO.
Description
Type
Checked compo-
nents
Detect
Pin
Meter stall
Normal
abnormal
1
AC rectify
Diode
D1, D3, D6, D11,
D14, D16
A/K
diode
0.36V
open or
short
2
mains input
Relay
K1,K2,K6
4/5
Ω
open
short
3
Battery input SCR
D7, D9, D18, D19,
D20, D21
A/K
Ω
open
Short
4
Battery input SCR
D7, D9, D18, D19,
D20, D21
G/K
Ω
≈10Ω
open or
short
5
Charge
SCR
Q70, Q71
A/K
Ω
open
Short
6
Charge
SCR
QJ1, QJ4, QJ5, QJ6,
QJ7, QJ8, QJ3,QJ12
G/K
7
Bypass
SCR
QJ1, QJ4 ,QJ5,QJ6,
QJ7,QJ8 ,QJ3,QJ12
A/K
A/K
open
Short
8
Bypass
SCR
K7,K8,K9
G/K
G/K
≈10Ω
open or
short
9
Bypass
Relay
K3, K4, K5
1/3
1/3
open
short
PFC power board
NO.
Description
Type
Checked compo-
nents
Detect
Pin
Meter stall
Normal
abnormal
1
BOOST
Diode
D7-D12
A/K
diode
0.36V
open or
short
2
BOOST
IGBT
Q1-12
E->C
diode
≈0.4V
open or
short
3
BOOST
IGBT
Q1-12
G/E
Ω
≈10KΩ
open or
short
4
Charge
FUSE
F3-4
Ω
0Ω
open
5
Charge
MOS
-
FET
Q13-14
S->D
diode
≈0.46V
open or
short
6
Charge
MOS
-
FET
Q13-14
G/S
Ω
≈20KΩ
open or
short