Samsung WC-M15i Series Service Manual page 120

Engine Controller (3/6)
BIASPWM
+5V
MHV
+24VS1 U202 +18V
KA7818
1 IN OUT 3
GND
C226 C227 C228
2
100NF 100NF 100UF
50V 50V 50V
Samsung Electronics
+18V +18V
R262
9.1K
1/8
R269 R253
75K 27K
U203-1
1/8 1/8
1 2
7407
VR204 C229 C223
D215
100NF 2.2NF
1N4148
50V 500V
10KOHM
R268
17.4K
1/8
+18V
R258
174K
1/8
R233
93.1K
R261 R257 VR203 1/8
20KOHM
5.6K 33K
1/8 1/8
R266
33K
C
U203-6 C230 R237
1/8
13 12 B 2.2NF 16.2K
50V 1/8
Q211
7407
E
KSC1008
+24VS1
C217
10NF
50V
C209
R223
100NF
47K
50V
1/8
R234
86.6K
1/8
R224 R231
LM324
47K 390
2
1/8 1/8
Q2 1
Q0
3 Q1
U201-1
R222 C210
15K 33NF
1/8 50V
SUPPLY
C222
R238
100NF
100K
50V
1/8
R227 R218
LM324
47K 430
9
1/8 1/8
Q2 8
Q0
10 Q1
U201-3
D223
1N4148
C208
33NF
50V
T204
+24VS1
D210
ESJA57-04
1 10
2
C220
100PF
2KV
4
5 6
C
Q204 TRANS10P
B
KSD526
E
R230
10
1/2
R418
+24VS1
10K
1/8
R413
R415
33K
3.3K
C
U203-4 1/8
1/8
9 8 B
Q403
7407 R414
E
KSC1008
1K
1/8
C204
470PF
+24VS1 T202
3KV
1 6
2
C404
100PF
2KV
4
5 10
C
TRANS10P
B
HS201
HEAT_SINK2
Q201
E
KSD526
R217
10
1/2
Schematic Diagrams
R412
1 HP1
SUPPLY
R239
ZD204
3.3M
UZ33B
1/2
C219 R226
ZD203
470PF 3.3M
1N5274B
3KV 1/2
R229
ZD205
3.3M
UZ33B
1/2
1 HP2
DEV
R210
3.3M
1/2
R212
3.3M
1/2
Q402 R419
2SA1413 33K
1/8
R416
2.2K
1/8
C403
R417
100PF
10K
2KV
1/8
NOT USED
D201
ESJA57-04
1 HP3
MHV
C201
R205
470PF
10M
CN8
3KV
1/4
1
2
R201
SLCON2P-MHV
10M
BR
1/4
R209 R208
2M 2M
1/4 1/4
R207
4.7M
1/4
R204
4.7M
1/4
8-3