Samsung YP-R1 Service Manual page 30

P_3.0V
R639
200K
3 Drain
Gate
2
Q601
KTK5132V
1 Source
V_DDCON
R606
1K
1% OK
1% OK
U604
MAX17040G+T
1 CTG SDA
2 CELL SCL
3 VDD EO
4 GND SEO
U301
Samsung Electronics
LED_DIMMING
LED+
DSF05S30U
DLIM2
28
PG2
27
LX2
26
MAX8819
PV2
25
U601
EN123
24
FB3
23
FB2
22
4700nF
C611
300mA
P_1.8V
KTK5132V
CORE_CTL
GND
CORE_CTL
HIGH : 1.05V
LOW : 0.82V
2
RESET_SW
I2C_DAT1
8
I2C_CLK1
7
U601
6
5
GND
 MAIN PCB Bottom, page 6-3
U501
C609
100nF
L604
D603
10uH
RST1
8
BAT
9
SYS
10
DC
11
CEN
12
FB1
13
CISET
14
R618
4.7K
L603
4.7uH
3 4
1% OK!
P_3.0V
3
3 Drain
CON601
4
Gate
2
Q602
1
Source
R631
GND
100K
R628
100K
<Fig. 4-8>
P_3.0V
INN_BATT
GND
Current = 2000 x
===> 300mA
P_3.0V
GND
1% OK!
300mA
P_1.0V
 Power Management, page 7-5
2
HIGH
4
GND
RESET_IN
LOW
3
GND
GND
USB_P5V
Troubleshooting
1% OK!
1% OK!
GND
200ms delay
2
1.5
R623
400mA
P_1.2V
4-15
3.0V