Philips MC-M250 Service Manual page 32

COMBI BOARD - CIRCUIT DIAGRAM
(For production after week 0303)
0250 E8 2251 C5 2256 A4 2261 A10 2266 A10
1250 C2 2252 C8 2257 A5 2262 C11 2267 D4
1251 C2 2253 D5 2258 F3 2263 B13 2268 D8
1252 H2 2254 D8 2259 F4 2264 C10 2270 G10
2250 D4 2255 D8 2260 G5 2265 C13 3250 A4
1 2 3
COMBI BOARD - SUPPLY PART
A
B
T250
C
(MC-M250
1251
1
9253
2
(MC148)
3
EH-B
D
T253
E
F
G
1252
EH-B T257
1
T258
to 2
H
8231A
Low Power Standby (L.P.S.)
T259
3
Transformer
T260
4
STANDBY
1 2 3
11 - 7
3251 A6 3256 B10 3261 C11 3266 D12 3279 H11
3252 G3 3257 B10 3262 C12 3267 E12 3280 H12
3253 G4 3258 B11 3263 C10 3268 E12 3281 B12
3254 G5 3259 B11 3264 C13 3269 E12 3282 B12
3255 B10 3260 B11 3265 D11 3278 G11 3283 B12
4 5 6
2256 6266
3250 3251
470R 2K2
22u 1N4148
6267
1N4148
(MC148) (MC148) (MC148)
T254
+B
(MC148) (MC148) (MC148)
T256
Recognition
6269
Mains Breakdown
1N4148
6270
3254
PWRDWN
1N4148 2K2
4 5 6
3284 B12 6253 D3 6258 C7 6263 D7 6268 A6
4250 B14 6254 C5 6259 C7 6264 D7 6269 F4
6250 C3 6255 C6 6260 D6 6265 D7 6270 G4
6251 C3 6256 C6 6261 D6 6266 A5 6271 G5
6252 D3 6257 C7 6262 D6 6267 A5 6272 B11
7 8 9 10
BDW94CFP
7250
-8V2 +A
7251
BC847B
3263
STANDBY
4K7
T255
+A
(MC118) (MC148)
(MC118: 3M3 25V)
(MC148: 4M7 25V)
PAD
P_GND D_GND A_GND
0250
to
BOTTOM
PLATE
8231B
7262
L4940V5
(no L.P.S.)
1
9255
+B
IN OUT
COM
(forseen only)
6274
2
1N4003
(L.P.S.)
7 8 9 10
11 - 7
6273 D13 7251 B10 7260 G11 9251 C4 9256 D11
6274 G9 7252 B11 7261 H12 9252 A14 T250 C2
6276 G10 7253 B13 7262 F10 9253 D3 T251 D2
6277 G10 7254 D12 8231A H3 9254 D13 T252 D2
7250 A10 7255 E12 8231B F9 9255 G9 T253 E2
11 12 13
BC847B
7252
3264
1K
(forseen only) BC369
3265
7254 T262
9254
+CD_MTF_MOTOR
+B
2R2
6273
9256
1N4003
(forseen only)
3269
7255
STANDBY
BC847B
22K
T263
3
+5V6 uP
CD
BC807-25
T264
7260
+5V6_S AF
RDS
ETF_LOGIC (MC148)
3278
47K
3280
7261
STANDBY
BC847B
22K
11 12 13
T254 D4 T259 H3 T264 G12
T255 D8 T260 H3
T256 E4 T261 A14
T257 H3 T262 D13
T258 H3 T263 G12
14 15
A
T261
+12V BACKLIGHT
ETF_MOTOR
9252
+AMP
TUNER
B
7253
+12V_AF TUNER
ETF_AF
C
CD SERVO
D
E
F
G
H
14 15