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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
3
4
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
1
C124
.1
R141
10k
C121
.0027
C120
270pF
1
14
13
11
IEA0
REF
Vcc
PWM
OUT
CR115
CR116
C147
.1
+
C128
6.8
C129
.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
6
1
2
U108
R169
1k
R170
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
.1
C141
.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
.1
R132
100k
R154
100k
ON/OFF
SENSE
BATTERY
BACKUP
TO REMOTE
ENABLE
WO104
EP110
+
U110C
LMC550AM
8
10
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
6.8
C233
.1
C154
.1
C115
.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
2
1
+
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
.1
R257
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
5
REMOTE ENABLE POWER SUPPLY
I SENSE
3
POWER FACTOR CHOKE
7,8
5,6
3,4