Philips PET944 Service Manual page 24

5
7.0 ELECTRICAL DIAGRAM
CIRCUIT DIAGRAM-AUDIO&VIDEO
D
C122 22P
R128 5.1R
L32 1.8uH
2 CVBS
C
C124
R132
180PF
C123
100P
75
VGND
VGND
+3.3V
R73
10K
AMP_POWER_CTL
R222
AMP_POWER
Q10
1
2 AMP_POWER
3904
1K
B
R210 75
C213
ER2
10PF
4
HP_DET1
7
5
6
3
R211 75
EARPHONE C214
10PF
R212 75
ER1
C215
4
HP_DET2 10PF
7
5
6
A 3
EARPHONE
R213 75
C216
10PF
5
4
+3.3V
+5V
+9VIN
R147
2 AOUT_R
R148
2 AOUT_L
AR-A
AR+A
AL-A
AL+A
DVD_CVBS
L39
+5V
FB600R
R155
10K
AMP_POWER_CTL
2
HP_L_OUT
AV-OUT-L L34 FB2K2 AMUTE_L
DVD_CVBS L35 FB2K2
AMUTE_R
AV-OUT-R L36 FB2K2
HP_R_OUT
4
3
+3.3V 1,2,3,4
+5V 1
+9VIN 1
EC34
AU_L_OUT
2 1
0 AU_R_OUT 10uF/10V
0 AU_L_OUT
EC37
AU_R_OUT
2 1
10uF/10V
C 2
SPR_R- 1 3 1
B E B
2N3904 2N3906
SPR_R+
SPR_L-
SPR_L+
VGND
R207 750R
VOL_CONTROL
C212
2.2uF/6.3V/0402
Q4
+5V_AMP
SI2307
2 3
EC64
C209 +
0.1uF 220uF/10V
AV_DET
AV_DET
L33
AV/OUT-JACK 0 AV1
EC28
3
3
2 1 7
7
8
8
100uF/10V
3
2
R124 47K
C121 68PF
U12A
R126
R125 10K 5.1K
EC35 10uF/10V
2
1 1 2
3
R129 C125
NJM4558-SOP-8
NC 1000PF
C1
NC
+Vcc
R133 100K AC
R134 47K
C127 68PF
R137
R136 10K 5.1K U12B
EC38 10uF/10V
6
7 1 2
5
VER
R145 C128
NJM4558-SOP-8
NC 1000PF
C 2
3
E
+9VIN
Q10 3904 L37 22UH/CD43 R149 51K
+Vcc
3 2
EC40 + C130 R151
EC3
R162 1K + 22uF/25V 0.1uF 56K
D1 10uF/25V/NC
10V
+3.3V
VOL_CON_PWM 2
R9
10K
AMUTE R233
2 AMUTE
1K
+5V_AMP
R220
U15
10K IC_MUTE
1
MUTE
2
SHUTDOWN
A_R_SPEAKER C204 1uF
3
RIN-
C4
C207 2.2uF
4
BYPASS
0.1uF
5
GND
A_L_SPEAKER C208 1uF 6
LIN-
VOL_CONTROL
7
VOLUME
8
VOLMAX
G1450
+5V_AMP
R208 R209
100K 100K
D21
HP_DET1
R218 100R HP_DET
HP_DET2
BAT54C
2
1
R127 0R
AV-OUT-L
R130 36K
A_L_SPEAKER
C126
D
820P
R2
20K
R144 0R
AV-OUT-R
R146 36K
A_R_SPEAKER
C129
R3
820P
20K
R150 100K
AC VER
C131 +EC41 C3
0.1uF 10uF/10V NC
C
Q1
3906
R165 1K IC_MUTE
2 3
R258
C28
0.1uF
100K
B
SPR_R-
16
ROUT-
R214
15 10K
VDD +5V_AMP
SPR_R+ EC66 220uF/10V HP_R_OUT
14
ROUT+
HP_DET C211 0.1uF
13
SE/BTL
12
GND
SPR_L+ HP_L_OUT
11 EC67 220uF/10V
LOUT+
R217
10
+5V_AMP
VDD
SPR_L-
9
LOUT-
10K
JP5
AR-A
1
AR+A
2
AL+A
A
3
AL-A
4
PIN HEADER 1X4
1