Philips MX3900D Service Manual page 84

PRE-AMPLIFIER, SUPPLY & INTERCONNECTION CIRCUIT
1200 F9 1233 F9 1240 D12 1245 D13 2208 F3
1201 F9 1235 A11 1241 B12 1246 A12 2209 E2
1230 B9 1236 B10 1242 A13 2201 A1 2210 F2
1231 D10 1238 G12 1243 B9 2202 B6 2211 D2
1232 C10 1239 D12 1244 G12 2207 D3 2212 F2
1 2
5.4V 6200
+5V_MUTE_1
+5V6
BAS316
A
6201 3200
+12A
100K
BAS316
GND_D
B
+HP
5.9V
HPREF
C
A_HP A_HP
2213
A_HP
100p
3237
HPREF
12K
2215
D
3235 5.9V
1B_L
220R
22u
5.9V
GND_A
2209
3233
HPREF
6K8
180p
3231
E
27K
3230
27K
3236 2210
HPREF
6K8
180p
5.9V
F
2217
3234
1B_R
5.9V
22u 220R
+HP
GND_A
3232 11.6V
HPREF
G
12K
2218
A_HP
100p
BC327-25
-32.4V
7205
H
6204
40VAC
1N4003GP
-33V
I GND_D
1 2
9-5
2213 C1 2218 G1 2226 G5 2231 I9 2242 F6 3201 A2 3206 B6
2214 D1 2219 G2 2227 F8 2232 G8 2254 H7 3202 I6 3207 B5
2215 D1 2220 G3 2228 I2 2233 C1 2280 D9 3203 B7 3208 B5
2216 F1 2224 G6 2229 I1 2240 I5 2281 D9 3204 B7 3209 A5
2217 F1 2225 H5 2230 H2 2241 H6 3200 A2 3205 B6 3210 B5
3 4 5
0.2V
3213 3211
47R 33R
7231
4.6V BC857B
3209
7200
BC817-25
1K
A_HP
3210
7250
BC817-25
1K
3214 3212
47R 33R 0.2V
2207
5.9V
47u
+HP
7230
DVD_5V
NJM4556AM 8
4.8V
VS+
3 INA+
O-A 1
2 INA-
5 INB+
O-B 7
47K
6 INB-
BC857B
VS-
7252
3277 4.6V BAS316
4
+3V3 6K8
A_HP
3.3V
3272
BAS316
2208
5.9V
47u
BD438
7204
3238
5232
+12A
2u2 6223
10R
40VAC
-6.8V
1N4003GP
A_HP
GND_D
7210
-Vkk
LM2576T-3.3
+C
1
VIN OUT
5
ON_|OFF FB
GND
GND_D
3 4 5
3211 A4 3224 D8 3233 E1 3238 G3 3245 H9 3257 C2 3263 H9 3271 E9
3212 C4 3225 D8 3234 F1 3239 I7 3250 I9 3259 G5 3265 G5 3272 F5
3213 A4 3230 E2 3235 D1 3240 H5 3252 G7 3260 I8 3268 H9 3273 F6
3214 C4 3231 E2 3236 F1 3243 H2 3254 H7 3261 H6 3269 G7 3274 E5
3215 H7 3232 G1 3237 D1 3244 H1 3256 C2 3262 H9 3270 E9 3275 E5
6 7 8
MIC_OUT
7232
4.8V 5.4V MIC_DET
BC847B
+5V_MUTE_1
HP_DET
3206
A_HP
5.4V 7233
5K6
BC847B
MUTE_HDPH
3203
0.2V 10K
LOW = MUTE
(Headphone not inserted)
GND_D
Mounted with 470n for
pt .3 board rework at Prod start
3225
AMP_L
1K0
AMP_R 3224
1K0
Res 3270 & 3271 cut & shift to
pin 10 and 8 of conn. 1232
for pt .3 board rework at Prod start
NTC
A_HP
6227 0.2V
7253
BC847B
6228
1N4003GP
+5V6 +5V
6225
Diode Added for
GND_D
GND_D
pt .3 board rework
at Prod start
Prod start with BD438 with
SS14
Heatsink and running change
to BD242B without heatsink
BD438 +5V_DVD
7208 6205
5.6V 5.2V
-6.2V +5V6
5V
Hi = ON
0.2V
10K
DVD_5V
7209
BC847BW
3261
+12M
5202
33u
GND_D
5201 +3V3 +3V3
2
100u
4
3V3_sense
7211
DVD_ON
10K
10K
Hi = ON
3239
DVD_5V
Hi = ON
BC847BW
6 7 8
9-5
3276 F5 4201 F11 4206 B12 5232 G3 6204 H1 6227 F5 7206 H9
3277 F5 4202 F13 4280 D9 6200 A2 6205 G8 6228 F5 7207 I9
3290 A10 4203 F13 4281 E9 6201 A2 6223 G4 7200 A4 7208 G7
3291 A10 4204 H13 5201 H6 6202 H6 6224 H5 7204 G5 7209 H7
4200 G11 4205 B12 5202 H6 6203 H6 6225 F7 7205 H2 7210 H5
6226 I2
9 10 11
TO HDPH
3290
& MIC PCB
1235
EH-B
40VAC
1
2R2
+12A
3291
8
GND_D
2
7
~F1
3
2R2
6
MIC
4
9291
5
+C
~F2
5
4 3V3_sense
GND_D
4
3 6
NTC
3
2 +3V3
2
GND_D
1
1 1236
+5V_DVD
1243
1230 FE-BT-VK-N
FE-BT-VK-N
+12V_DVD
FE-BT-VK-N 1
Non- Karaoke LPC
GND_M
2
Karaoke
GND_D +5V
3 -5V
+5V6_ECO
+12V_DVD
4
+12M
5
PWD_DN
1232
FE-BT-VK-N
1
NTC
2
GND_D
3
40VAC
4
PWD_DN
#
4280
FE-BT-VK-N
1231
2280
10
470n
A0
9
2281
A_HP
A1
8
470n
AMP_ON_LRCS
A2
4281 # 7
cut cut
AMP_C
I2C_CLK3
6
GND_C
GND_D
5
AMP_ON_LRCS I2C_CLK2
4
GND_D
3
A_HP I2C_CLK1
FREQ_HOP
2
NTC
GND_D
1
AV Board to AV
I2C_DATA
TO SUPPLY PCB
Board Connection
DVD_ON
EH-B EH-B 1233
1200 1201 EH-B
DVD_5V
1
1 1
+C
+5V6
2 2 2
3 3 3 GND_D
GND_D
-Vkk
4 4 4
~F1
5 5 5
+5V6
~F2
6 6 6
7 7 7
GND_M
8 8 8
GND_A
9 9 9
+12A
10 10 10
+12M
TU_ENABLE
TU_DATA
BD438
+12V_DVD
7206
TU_CLK
12V 11.8V
TU_STEREO
11.3V
MUX_VU
MUX_DET
+5V6_ECO
0.2V
7207
LPC
BC847BW
3260
MUTE_SCART_LO
PWD_DN
GND_M
9 10 11
7211 I7 7250 B4
7230 E3 7252 E5
7231 A5 7253 F6
7232 A6 9291 A10
7233 B7
12 13
FMN
1242
1
2
A
3
4
1246 5
FMN
6
1
1241
2
4206 7
3 1
4205
4 2
8
5 3
6 4
9
7 5
B
8 6
10
9 7
10 8
11
11 9
12 10
12
13 11
14 12
13
15 13
14
15
FMN-BTRK
TO DVD Module
C
D
1240
1245
FE-BT-VK-N
1239
FE-BT-VK-N
FE-BT-VK-N
1 1 1
2
2 2
3 3 3
4 4 4
5 5
5
E
6 6 6
7 7
7
8
8 8
9 9 9
10
10 10
11 11 11
12
12 12
F
13 13 13
14
14 14
15 15
4202
+12M
4201
16
16 4203
VID_RGB
4200
17
G
1244 1238
FE-BT-VK-N FE-BT-VK-N
1
1
2 2
3
3
GND_D
4 4
5
5
H
6 6
GND_D
FM_DET
7
7
4204
8 8
9 9
10 10
GND_D
11
11
12 12
I
13
13
SD
14
TO FRONT PCB
AV circuit 3139 118 35003 sheet 2 dd wk304
12 13