Philips PET740 Service Manual page 21

8.0 ELECTRICAL DIAGRAM
MAIN BOARD CIRCUIT DIAGRAM (CPU&CONTROL)
SW3 SW3
RST
C151 C151 R137 R137
100N 100N BKGD
10K 10K
CPU3V3
SHUTDOWN
RMIN
RMIN
POWEREN
CPU3V3
R143 R143
10K 10K
R142 R142 1K 1K
RMIN
CPU3V3 R144 R144 10 10
C92 C92 C93 C93
10U/10V 10U/10V 0.1U 0.1U
MC9S08QG4 MC9S08QG4
PWM
1 16
BATAD
2 15
3 14
DVDIN
4 13
POWERKEY
5 12
KEYAD0
6 11
KEYAD1
7 10
IROUT
8 9
U29 U29
CPU3V3 R104 R104 10K 10K
U34 U34
R105 R105 10K 10K
1
RMC
2
GND
R106 R106 10K 10K
3
VCC
38B 38B
+P5V
R108 R108
4.7K 4.7K
SHUTDOWN VD27 VD27
1
DTC144 DTC144
R107 R107
10K 10K
TFTON/OFF
POWEREN R145 R145 1K 1K
POWEREN#
C94 C94
0.1U 0.1U
BATAD
R147 R147 R146 R146
39K 39K 10K 10K
DCA
POWERKEY
KEYAD0
+P5V
KEYAD1
U30 U30
FMC3 FMC3
R71 R71
SHUTDOWN#
47K 47K
U31 U31
1 5
1 5
2
2
3 4
3 4
FMC3 FMC3
R118 R118
47K 47K
RST
BKGD
CPU3V3
GND
R45 R45
0 0
IROUT
R112 R112 47K 47K DVDIN
VOL_PWM
C168 C168
10U/16V 10U/16V
R121 R121 10K 10K
SW1 SW1
3
TFTSW
4
R122 R122 10K 10K
5
CLOSESW
4
TFTON
J4 J4
6
5
4
3
POWERKEY
2
KEYAD0
1
KEYAD1
53261-0490 53261-0490
+P5V
R127 R127 47K 47K
DV33
RXD
RXD/SD_CMD
R128 R128 47K 47K
DV33
TXD
GND
R116 R116 1K 1K
IR
R115 R115 0 0
MCUCOMU
DV33
2
3 2
5
4 5
1
1
TFTSW TFTSW
DV33
SW2 SW2
1
5 1
2
4 2
3
3
CLOSESW CLOSESW