Samsung YP-R1 Service Manual page 27

Troubleshooting
LED_PWM
1
KDS121V
PWR_IN_DDCON
PWR_ON_OFF
P3.3_CTL
CHG_STATUS
GND
GND
1
INN_BATT
8
7 P_3.0V
6
5
4
3
2
1 GND
8P
CON601
4-12
P_3.0V
R639
200K
3 Drain
Gate
2
Q601
KTK5132V
1 Source
V_DDCON
D601
R606
1K
U604
1
U604
MAX17040G+T
R633
150
1 CTG
2 CELL
R632
3 VDD
150
4 GND
LED_DIMMING
1
LED+
DLIM2
28
PG2
27
LX2
26
PV2
25
EN123
24
FB3
23
FB2
22
4700nF
C611
300mA
P_1.8V
1% OK
1% OK
U504
CORE_CTL
GND
CORE_CTL
HIGH : 1.05V
LOW : 0.82V
I2C_DAT1
SDA
8
I2C_CLK1
SCL 7
EO
6
SEO 5
GND
 MAIN PCB Top, page 6-1
<Fig. 4-6>
C609
100nF
L604
D603
10uH
DSF05S30U
RST1
8
BAT
9
SYS
10
MAX8819
DC
11
U601
CEN
12
FB1
13
CISET
14
 Power Management, page 7-5
R618
4.7K
1
L603
4.7uH
1% OK!
P_3.0V
3 Drain
KTK5132V
Gate
2
Q602
1
Source
R631
GND
100K
RESET_SW
R628
100K
U701
Samsung Electronics
V_DDCON
P_3.0V
INN_BATT
GND
Current = 2000
===> 300mA
P_3.0V
GND
1% OK!
300mA
P_1.0V
GND
RESET_IN
U401
GND
GND
U101