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March 1999
Part No. 001-2009-600
800W POWER SUPPLY SCHEMATIC (2 OF 2)
FIGURE 10-47
10-42
R151
20k
R152
4.7k
CR140
U104A
74HC08
TO SYN CIRCUIT CR128/CR121/L101
APPROXIMATELY 100V PEAK
1
2
3
C138
.001
R176
100
U104B
74HC08
4
5
6
CR122
R178
2k
Q110
3600
Q111
3600
R158
15k
C152
.1
R180
7.5k
R179
4.7k
Q112
3600
R181
1k
SYNC
C161
.01
+
C160
15
R267
430
+
C199
6.8
3
1
2
VIN VOUT
GND
R268
4.7k
+
C159
6.8
U111
LM317T
+26.5V
1
2,3,4,5,6,7
8
VIN VOUT
GND
U105
LM78L05
C131
.1
+
C132
1
+15V
SOURCE
SYNC PULSE WIDTH
CONTROLLER
SYNC PULSE OUTPUT
BUFFER
+
C133
1
C134
.1
+5V
SOURCE
U104
R203
2k
Q123
6110
R204
2k
R201
180
C162
.1
Q122
6026
R200
18
R199
18
R198
18
CR124
+26.5V
+
C163
2700
R205
10
R206
10
R207
51
R231
180
R208
51
C164
.001
Q124
6026
CR125
CR126
Q125
6352
1
3
2
4
CR127
R209
620
R210
620
R308
0
R232
820
R229
820
C183
270pF
T108
INPUT CURRENT
SENSOR
R227
180
L102
14
OUT
7
9
RAMP
I SD
R226
24
C176
.001
R224
0
R225
68
C172
.01
6
C T
Q127
3600
Q128
3612
R315
820
R219
470
R218
4.7k
INV
1
R221
36k
C175
.22
C173
.0022
3
EA OUT
R220
2k
2
NI
C173
.1
R228
2k
16
V REF
11
I REF
U112
R233
3.3k
R234
1k
C182
470pF
10
GND A
GND
12
13
VC
15
Vcc
+
C180
6.8
C181
.01
+15V
+
C178
1
8
S S
R223
13k
5
R T
+15V BUCK CONTOLLER
+
C165
1500
+
C166
1500
C167
.01
R215
6.2k
L103
R216
1k
R217
1.2k
+
C169
1500
C170
.01
WO 115
HIGH CURRENT OUT
WO 107
+15V DC OUTPUT
WO 108
GROUND
R211
12.4k
R212
2.26k
C220
.1
U116
TL431ID
8
CATHODE
7
6
5
ANODE A
ANODE B
NC A
REF
ANODE D
ANODE C
NC B
R214
1k
1
2
3
4
Q126
3612
R213
200
C168
.01
R281
470
1
2
4
6
5
U119
IL205A
R240
2k
Q130
6110
R241
2k
R238
180
C184
.1
Q129
6026
R237
18
R236
18
R235
18
CR130
+26.5V
+
C186
1500
R242
10
R243
10
R244
180
R245
51
C185
.001
Q131
6026
CR131
CR132
Q132
6352
1
3
2
4
CR133
R247
36
R309
0
R269
360
C203
270pF
T109
L104
14
OUT
7
9
RAMP
I SD
6
C T
INV
1
R258
36k
C194
.22
C193
.0022
3
EA OUT
R256
2k
2
NI
C192
.1
R264
2k
16
V REF
11
I REF
U113
R265
3.3k
R266
1k
C202
470pF
10
GND A
GND
12
13
VC
15
Vcc
+
C200
6.8
C201
.01
+15V
+
C198
1
8
S S
R259
13k
5
R T
+15V BUCK CONTOLLER
+
C187
1500
+
C188
1500
C189
.01
R253
4.7k
R254
1k
R255
4.3k
WO 109
+5V DC OUTPUT
WO 110
+5V DC GROUND
R249
3.4k
R250
2.49k
C222
.1
U117
TL431ID
8
CATHODE
7
6
5
ANODE A
ANODE B
NC A
REF
ANODE D
ANODE C
NC B
R252
1k
1
2
3
4
Q133
3612
R251
200
C190
.01
R246
470
1
2
4
6
5
U120
IL205A
C196
.001
R261
24
R260
68
C195
.01
SHUTDOWN
DRIVE
TO U115
+5V
C191
.0047
OVER-VOLTAGE 6V
MAXIMUM
C204
.047
R270
33k
R271
3.3k
L105
CR136
C208
.1
+
C209
1500
U114
MC33166T
2
5
1
3
OUT
COMP
V FB
GND
Vcc
+
C205
1500
4
+26.5V
-5V CONVERTER
R284
3.4k
R285
2.49k
C227
.1
U118
TL431ID
8
CATHODE
7
6
5
ANODE A
ANODE B
NC A
REF
ANODE D
ANODE C
NC B
R286
1k
1
2
3
4
Q138
3612
R287
200
C211
.01
R303
200
1
2
4
6
5
U122
IL205A
UNDER-VOLTAGE -6V
MINIMUM
C212
.01
WO 111
-5V DC OUTPUT
CR141
CR135
CR129