LG KF700 Service Manual page 67

4. TROUBLE SHOOTING
+5V_PWR
R405 0
VBATT
ICHARGEOUT
BATT_FET_N
C423 1u
USB_VBUS
USB_DAT
C426 R412
4.7u
47K
USB_SE0
PM_ON_SW_N (R414)
PMIC_DIAL_LED_EN
KYPD_LED_EN
PM_ON_SW_N
USIM_P_DATA
VREG_RF_SMPS
VREG_MSMC_1.2V(C445)
LGE Internal Use Only
1
ADC_BYP
2
VCHG
3
ICHARGE ISNS_P
4
CHG_CNT_N CHG_CTL_N
5
ISNS_M
6
VBAT
7
BAT_FET_N
8
FLSH_DRV_N
9
RESET_IN_N
PON_RESET_N
10
VREG_USB
11
USB_ID PM6650-3P
12
VREG_5V
13
USB_OE_N USB_OE_N
14
VSW_5V
15
USB_CNT_N USB_CTL_N
16
USB_VBUS
17
USB_DAT
18
USB_D+ USB_D_P
19
USB_SE0
20
USB_D-
USB_D_M
21
GP1_DRV_N(MPP7)
+VPWR
VBATT
R414
100K
4.7u C435
L401 4.7uH
ind_2x1_6h1_r
C438 C439 C440 C441
10u 10u 0.1u 1000p
VREG_MSMC_1.2V
L403 4.7uH
R416
0
C444
C445
4.7u
1000p
63 C418 0.1u
REF_BYP
62
REF_GND
61 R406 121K
REF_ISET
60
VCOIN
59
MSM_INT_N PM_INT_N
58
TCXO_IN TCXO_PM
57
PS_HOLD
56
VREG_MSMA
U402 55
TCXO_EN
54
VDD_ANA
53 R409 47
TCXO_OUT
52
VDD_MSM
51
SBST
50
VREG_MSMP
49
SBCK
48
VBACKUP
47
SBDT
46
XTAL_OUT
45
SLEEP_CLK SLEEP_CLK
44
XTAL_IN
43
USIM_P_RST_N
RUIM_RST(MPP6)
+VPWR
VREG_MSMA_2.6V(C424)
USIM_RST_N
USIM_P_CLK
USIM_CLK
VREG_MSME_1.8V
L402 4.7uH
R415 0
C442
C443
VREG_MSME_1.8V(C442)
1000p
10u
Copyright © 2008 LG Electronics. Inc. All right reserved.
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PS_HOLD(D400)
R403
470K
JTAG_PS_HOLD
D400
PS_HOLD
RB521S-30
C419 1u
V_BACK_UP
VREG_MSMA_2.6V
TCXO_EN R408 0
VREG_MSMP_2.7V
BUFF_TCXO
R410
R411
C424 C425
SSBDT_PM
X400
4.7u
2 R413
4.7u
56K
1
32.768KHz
C427 C428
15p 15p
VREG_USIM_3.0V VREG_MMC_3.0V
USIM_DATA VREG_MSMP_2.7V(C425)
C436 C437
2.2u 2.2u
Only for training and service purposes
56K
0