March 1999
Part No. 001-2009-600

10-41 800W POWER SUPPLY SCHEMATIC (1 OF 2)

FIGURE10-46
150V DC
BATTERY BACKUP
EP108
DC INPUT (+)
RED
EP105
DC INPUT (-)
BLACK
EP104
HV GROUND
BATTERY BACKUP
EP109
RT101 RT102
IN RUSH CURRENT
LIMITERS
R101
330k
R102
330k
R103
240k
R104
100k
C103
.22
R140
15k
C118
270pF
+C117
.47
+C119
1
C127
.01
R142
560k
C126
.1
4
5
10
16
V RMS
SS
GND
V EAO
U102
ML4841IS
R105
330k
R106
330k
R107
330k
2
IAC 400V
CONTROLLER IC
R302
20k
R110
20k
R108
20k R109
20k
R120
20k
R306
20k
9,10
12,13
14,15
16,17
18,19,20
CR105
CR106
1
11
+
C104
1
CR103
+C105
1
R116
36k
+C106
1500
R128
51
+C107
1500
R117
330
+15V
PRE-CONTROLLER
C114
.1
Q108
6027
R126
10
R112
10
Q107
6026
R115
4.7k
CR114
R111
220
12
PFC
OUT
Q101
6354
R113
.03
R114
.03
R153
100
C116
.1
CR145
+C110
330
+C111
330 R311
100k R121
100k
R312
100k R122
100k
R313
100k R123
100k
R314
100k R124
100k
R127
1.27k
15
FB
9
RAMP2
1
34
2
PRI SEC
T105 CR112
+400V
R125
13
R307
0
C125
.0033
R146
100
6
VDC
R143
3k
C122
470pF
R144
24.3k
R119
24.3k
7
8
RTCT
RAMP1 C108
470pF
C113
.0047
+C123
1C124
.1
R141
10k
C121
.0027
C120
270pF
1
14
13
11
IEA0
REF
Vcc
PWM
OUT
CR115
CR116
C147
.1
+C128
6.8C129
.1
Q104
6026
R149
1k
+15V +15V
PRE-CONTROLLER
SWITCHED PRE-CONTROLLER
R148
4.7k
+
C139
6.8
+
C140
6.8
1
8
+
C137
2.2
+
C228
2.2
+
C197
2.2
+
C136
2.2
3
6
4
5
T106 R161
20
R159
20 CR123
R160
470
Q115
6026 CR117
18V
CR119
Q116
6351
R163
20
R165
20 CR134
Q117
6026
R164
470
CR120
18V
Q118
6351
CR118
+400V
5
4
61
2
U108
R169
1kR170
820 R171
820 R172
100k
C150
.01
U109
TL431ID
8
7
6
5
1
2
3
4
CATHODE
ANODE A
ANODE B
NC A
REF
ANODE D
ANODE C
NC B
C149
.1
R175
1.8k
R174
1k
R173
16.9k
+2.5V
R222
0
1
8
3
12
16
18
19
20
15
14
R272
51
C207
.0022
C210
.0022
67V TO BATTERY BACK-UP
EP106
R166
10 R167
10 R168
10
C142
.001
CR121
CR128
L101
TO SYNC CIRCUIT U104, Q110,
Q111, Q112 (2)
APPROXIMATELY 100V PEAK
+C143
2700
+C144
2700
+C145
2700 C146
.1C141
.1
F102
10A
(25.9-27.3V)
MAIN OUTPUT VOLTAGE SET/
FEEDBACK
4
5
6
21
U107
CR148
13V CR107
R155
36k
CR137
R150
2k
Q103
3600
CR138
R130
100k
R129
36k
R131
36k
R133
100k
R134
20k
Q106
3600
C148
.1R132
100k
R154
100k
ON/OFF
SENSE
BATTERY
BACKUP
TO REMOTE
ENABLE
WO104
EP110
+
U110C
LMC550AM
810
9
R137
1M
R136
100k
R118
18.2k
R135
13k
C236
.1
R138
2.26k
R139
2.26k
C234
.001 Q114
3612
Q105
3612
C225
.01 R156
1k R274
1k
R157
20k
U115
TL431ID
8
7
6
5
1
2
3
4
CATHODE
ANODE A
ANODE B
NC A
REF
ANODE D
ANODE C
NC B
R202
20k
SHUTDOWN DRIVE
TO U119, U120, U122 (2)
R263
2.49k C135
.1
R262
29.4k
SHUTDOWN
OVER-VOLTAGE
CGR
BATTERY BACKUP
GROUND
BATTERY BACKUP
EP112
EP111
WO105
WO106
+26.5V DC EXTERNAL INPUT
POWER
CONNECTOR
+26.5V
+C230
1
C229
.1
U106
LM78L05
VIN
GND
VOUT
81
2,3,4,5,6,7
+C232
6.8C233
.1C154
.1C115
.1
A803IN
GND
OUT
1
3
2
THERMAL
SENSOR
+5V
SOURCE
+C153
1
R182
75
+
U110A
LMC550AM
R184
357k
R183
95.3k
R230
100
+5V
WO116
TEMP OUTPUT
R185
1k
C156
.01
R186
10k
3
21+
U110A
LMC550AM
12
13 14
R189
6.81k
R188
10M +5V
R187
95.3k
R190
1k
R273
1k
2
1
J102
BATTERY
BACKUP
FAN CONTROL
CR139
R191
3.3k
Q120
3600
R192
8.2k
R193
8.2k
R194
8.2k
R195
8.2k
R196
8.2k
Q121
3600
R197
10k
2 FAN HIGH
1 FAN LOW
+26.5V
J201
FAN CONTROLLER/
DRIVE
BUFFER/
HYSTERESIS
C102
.01
+C101
220
CR113
5.1V C109
.1R257
10k
CR101
CR110
CR102
CR111
AC COLD INPUT (BLU)
AC HOT INPUT (BRN)
R280
10k
Q102
3612
+5V
C236
.1
R279
10k
R278
100k
R277
10k
U121
TL431AID
REF
GND
CATH
8
2,3,4,5,6,7
1
R276
10k
R275
20k
CR142
CR143
L107
CR104
18V
EP101
EP102 6
5REMOTE ENABLE POWER SUPPLY
I SENSE
3
POWER FACTOR CHOKE
7,8
5,6
3,4