Philips PET944 Service Manual page 20

5
7.0 ELECTRICAL DIAGRAM
CIRCUIT DIAGRAM-POWER
D
J2
DC_JACK
T1 CON
2 1 DC_IN
IN H OUT L
C
+9VIN
L3 22uH/CD43
C9
+
0.1uF
B
GND GND
L6 22uH/CD43
C15
+
0.1uF
+
GND GND
C16
1uF
A
GND
5
4
D4
F1
1
FUSE
D5 SK34
4001
3 POWER_K1
3 POWER_K2
R8
1K
R5
4.7K
D6
15V
ON/OFF
1
R11 Q7
1
R171
3904
4.7K
10K
R12
10K
+3.3V
Q8
L4
SSP0403
2 3
22uH/CD54
R135
C8
EC6
+
CB10
470uF/6.3v
0.1uF
2K
560pF/NC
GND
GND GND
+
R15 3.3K R16 20K
5
VIN
C11
R19 C12
3 1 2
VFB
1uF
1
CE 2.7K/NC
D3
1000P/NC
U2
R21 IN4148
GND
SS7701
R6 200R
10K
EN1
GND
C13
R56
EN1
2K
1uF
GND
GND GND
+5V
Q11 SSP0403 L7 22uH/CD54
2 3
C153 + EC8
560pF/NC
CB11 0.1uF 470uF/6.3v
GND GND GND
5
VIN
R27 2K R28 39K
3
VFB
1
CE
R29 2.7K/NC C17 1 2 1000P/NC
U3
D9
SS7701
R30 IN4148
R71 200R
10K
EN2
GND
C141
EN2 R74
20K
1uF
GND GND GND
4
3
Discharge
DQ1
SI2307
CHARGE_DCIN
2 3
D2
DQ6
1
DD4
3904
15V
SK34
DQ7
1
3904
DR16 4.7K
DR18
10K
Q5
SI2307
2 2 3
R51 9V_CLOCK
9V_CLOCK 3
68K
EC5
POWER_K1
100UF/25V
POWER OFF
POWER ON
POWER_K2
R4
Q22 BAT54C 4.7K
ON/OFF Q6 +3.3V
1 1
3904
3
D12 R186
2
27K
IN4148
ON/OFF DRIVE
+3.3V
EC1
10uF/10V
R170
10K
R49 560
ON/OFF DET
Q23
3904
+9VIN
R20
30K/1%
R18
10K
R10
3.3K/1%
1
R22 4.7K
Q2
1
3904
R23
3.6K/1%
+3.3V
R26 270R
POWER ON_LED
GREEN
POWER ON INDICATION
3
2
Discharge
CHARGE_DCIN
DET_PLAY
DET_PLAY
+3.3V
U1
3 2
IN OUT
+9VIN
1 4
GND OUT
+
1117-1.8V
CHARGE_LED
CHARGE_LED
POWER ON_LED
GND
+3.3V
R17
10K
Low Voltage Det
Q9
3904
+9VIN
+5V
+3.3V
+1.8V
Low Voltage Det
ON/OFF DET
ON/OFF DRIVE
2
1
+5V
R56
1K
D
+1.8V
L1 FB600R
C2
EC2
+
0.1uF
47uF/10V
C
JP4
1
2
3
PIN HEADER 1X3
B
+9VIN 2,5
+5V 2,3,5
+3.3V 2,3,4
+1.8V 2
Low Voltage Det 2
ON/OFF DET 2
ON/OFF DRIVE 2
A
1