Samsung YP-Q1 Service Manual page 25

Troubleshooting
TP301 P5V
INT_BATT
?
1
2
2P,SMD-A
CON300
GND GND
?
TP300
4.7uH
GND
DLIM1
21
4.7uH
PG3
20
V_DDCON
LX3
19
PV13
18
P3.0V
LX1
17
PG1
16
CHG
15
GND
4.7uH R323
9.1Kohm
2
1%
GND
CHARGE_SUSP
P5V
V_DDCON
3
GND GND GND
P3.0V
Q303
HOLD
KRC408V
CON300
4-12
INT_BATT
IC301
7WH74
EXT_PWR
1 CK VCC 8
2 D PR 7
3 Q CLR 6
4 GND Q 5
V_DDCON
GND
CHG_DLIM2
GND
IC300 GND
MAX8819
1%
COMP4
1
GND
FB4
2
OVP4
3
PG4
4
GND
L303
10uH
LX4
5
GND
6
EN4
7
P3.0V
GND GND GND
R321
1K
INT_BATT
GND
GND
INT_BATT
R315
10Kohm
S/W300
4V
C
1 2 3 4
GND
1
IC301
IC600
1
INT_BATT
KDS121V
D300
KDS121V
GND
Q300 D302
KRC857E
6 1
PWR_OFF
5 2
INT_BATT
4 3
GND
LED_C-
GND
LED_A+
V_DDCON
Q302
EMD2
LED_CTL
P3.0V
1
GND
2
3
1%
CPU_RST
BATT_LEV
1%
GND
PWR_IN_DDCON
 POWER Page, 7-3
R313
47K
PWR_IN_CPU
3
2
IC300
 MAIN PCB Bottom Page, 6-4
<Fig. 4-5>
1
P5V
2
PWR_IN_DDCON
RTC_INT
3
DCDC_EN
6
INT_BATT
5
4
IC602
Samsung Electronics