Philips PET744, Service Manual

Page: 20 / 36

5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
CON 14P*1.25
DCPWM1
CIRCUIT DIAGRAM-TFT POWER/BL
7.0 ELECTRICAL DIAGRAM
BL_EN
+9V_TFT
+3.3V_TFT
DCPWM1
DC_FBK1
PCK1
PWM
+5VD
+9VIN
FB
+3.3VTFT
+9VIN_TFT
IR
BL_EN
PWM
LP
+5V_TFT
DC_FBK1
LP
PCK1
VGL
VGH
AVDD
AVDD
VGL
VGH
+9V_TFT
DC_FBK1
DCPWM1
+3.3V_TFT 1
+9V_TFT 2
DC_FBK1 2
DCPWM1 2
PCK1 1
LP 1
DCPWM1 3
VGL 1
VGH 1
+9V_TFT 3
DCPWM1 2
AVDD
1
DC_FBK1 2
DC_FBK1 3
+5V_TFT
+9V
SW_DC
VSW
VGH
AVDD
+5VD
VSW
+9V
VGL
Q1
3906
1
2 3
R34
4.7k
1 2
R43
10K
DN1 SS214U
1
2
3
R27 10K
C35
0.1uF
R37
10R
R47
1R
D3
12V
1
2
Q4
3018
1
2
3
C33
0.1uF
C32 0.01uF
L3
100uH/COIL
D4
BAT54C
1
2
3
R14 0R
R16 0R
R48
0R
R23 90K
R40
13K
+
C25
10U/25V/1206
Q2
3904
1
2 3
DN2 SS214U
1
2
3
C23 0.1uF
1 2
LD23 FB 600R
C34
0.1uF
C24
1uF/0805
1
2
D1
7.5V
1
2
R5 0R
+
C20
10U/10V/0805
Q5
3904
2
1
3
R44
10K
LED +1
C29
10U/10V/0805
DN4
SS214U
1
2
3
C22
1uF/0805
1
2
C21 0.1uF
1 2
R41
1K
C30
0.1uF
C18 0.1uF
1 2
C26 0.1uF
1 2
LED —1
U2
SS6610
1
5
3 4
2
6
SW
OV
FB EN
GND
VIN
Q3
3904
1
2 3
R35
10R
C3
1
10U
/10V/
0805
J1
14
13
12
11
10
9
8
7
6
5
4
3
2
1
R7
0R
D5
SSD03
1 2
R38
1k
1
2
R36
1k
1
2
+
EC4
2.2UF/16V/0805
LD21 FB 600R
R42
1.8K
+
EC5
100uF10V
LD24 FB 600R
DN3
SS214U
1
2
3
D2
18V
1
2
R18 0R
R46
0R
R45
4.7k
L5 22uH/CD54
+
C28
10U/25V/1206
C27
1uF/0805
1
2
C19
1uF/0805
1
2