Philips MC-M250 Service Manual page 33

COMBI BOARD - CIRCUIT DIAGRAM
(For production after week 0303)
1330 A12 2333 E5 2338 D9 2343 A11
1331-A D13 2334 C5 2339 F9 2344 B11
2330 B7 2335 E5 2340 C9 2345 D12
2331 E4 2336 D5 2341 A10 2346 D12
2332 D4 2337 E9 2342 B10 2347 F10
1 2
COMBI BOARD - POWER AMPLIFIER PART
A
B
C
D
from
Source Selection and Sound Control Part
E
F
G
H
1 2
11 - 8
2348 F10 2353 G6 3332 D4 3337 E9
2349 G9 2354 G7 3333 E4 3338 C9
2350 F5 2355 B7 3334 D4 3339 A10
2351 B5 3330 F5 3335 E9 3340 B10
2352 H5 3331 E4 3336 D9 3341 A11
3 4 5
4335
MUTE
+5V6
(forseen only)
T330
3358
3354 4K7
10K
7334
BC847B
(forseen only)
2334
150n
T344 2332 3332
R
10K 4334
150n 6 IN1
5 STB
9
(forseen only)
2333
8 IN2
150n
T343 2331
3331
L
4333
10K
150n
+12V
3330
3K3
T336
T331
6333
3359 3361
STANDBY
1N4148 6K8 100R
3 4 5
3342 B11 3347 F7 3352 G11 3359 H5
3343 E8 3348 F6 3353 G10 3360 H5
3344 D8 3349 F7 3354 B4 3361 H5
3345 E8 3350 H7 3356 A4 3362 B7
3346 C8 3351 G11 3358 B5 3363 B7
6 7 8 9
(MC148)
9330
+AMP
BDW93CFP
7335
3362 3364 3365
1K8 390R 270R
(MC118)
T333
T332
5334
360n
7330
3338
AN7125
1
2R2
VCC
5332
OUT1+ 2
360n
GND1 3
3336
4
OUT1-
2R2
STB
VREF
MUTE
MUTE
5331
10
OUT2-
360n
GND2 11
3335
OUT2+ 12
2R2
GND
5333
7
360n
3337
2R2
POWERSTAGE
PROTECTION
3349
22K
BC857B BC857B
BASS_ALC
7332 7331
to 3547/3548
T335
DIGITAL SOUND
CONTROL (DSC)
7333
BC847B
6 7 8 9
11 - 8
3364 B8 5331 D9 6332 G10 7332 G6 T330 B6
3365 B8 5332 D9 6333 H4 7333 H6 T331 G5
4333 E5 5333 E9 6334 B8 7334 B4 T332 C6
4334 D5 5334 C9 7330 C6 7335 B7 T333 C7
4335 A4 6331 G10 7331 G7 9330 A7 T334 G9
10 11 12
HEADPHONE SOCKET
2341
3339
7
120R 47u
L 4
T337
L 3
2
R
T338 5
R 6
2342
3340
1
120R 47u
T339
T341
T342
T340
T334 3353
47R
10 11 12
T335 G8 T340 D12
T336 G6 T341 D12
T337 A11 T342 D12
T338 B11 T343 E3
T339 D12 T344 D3
13 14
A
1330
16 - 150 ohm
B
C
1331-A
D
L 1
LS BOX
8R
L 2
left
3
R
LS BOX
4 8R
R
right
Clickfit
socket
E
F
G
H
13 14