Samsung SGH-A737 Service Manual page 36

Flow Chart of Troubleshooting
- Schematic for Power on
SAMSUNG PROPRIETARY
THIS DOCUMENT CONTAINS CONFIDENTIAL
PROPRIETARY INFORMATION THAT IS
SAMSUNG ELECTRONICS CO 'S PROPERTY.
DO NOT DISCLOSE TO OR DUPLICATE FOR OTHERS
EXCEPT AS AUTHORIZED BY SAMSUNG.
JIG_ON_SW
TR400
3
1
JIG_ON R401
2
R402
R404
C407
D400
TCXO_EN
D401
BT_EN
C426 C425
OSC400
D403
PS_HOLD
D404
BOOT_SW
- Layout for Power on
PM IC
VEXT_5V
USB_5V VBATT
C400
C401
R400
PM401
2
VCHG
16
USB_VBUS
3
R403 C404
ISNS_P
5
ISNS_M
4
CHG_CTL_N
15
USB_CTL_N
6
VBAT
60
VCOIN
7
BAT_FET_N
C405
48
VBACKUP
1
ADC_BYP
44
XTAL_IN
C406
46
XTAL_OUT
45
SLEEP_CLK SLEEP_CLK
58
TCXO
TCXO_IN
55
TCXO_EN
53
BUFF_TCXO TCXO_OUT
70
R405 AMUX_IN1
72
AMUX_IN2
82
VF_MSM
AMUX_OUT
80
REF_OUT REF_OUT
13
USB_OE_MSM USB_OE_N
17
USB_DAT_MSM
USB_DAT
19
USB_SEO_MSM
USB_SE0
11
USB_ID
18
USB_D_P USB_D_P
20
USB_D_M
USB_D_M
24
PHONE_ON
KPDPWR_N
57
PS_HOLD
66
JIG_ON_SW CBL1PWR_N
68
TP_PON_RESET_N CBL0PWR_N
9
PON_RESET_N
PON_RESET_N
30
SIM_IO
RUIM_M_IO
26
USIM_IO RUIM_IO
34
SIM_CLK
RUIM_M_CLK
38
USIM_CLK
RUIM_CLK
SIM_RST 40
RUIM_M_RST
43
USIM_RST RUIM_RST
47
SBDT SBDT
49
SBCK
51
SBST
59
PM_INT_N MSM_INT_N
VREG_MSMP_2.6V
R409
R410 R411
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
VREG_RF_SMPS
VREG_RFTX_2.65V
C402 C403
14
VSW_5V
12
VREG_5V
27 L400
VSW_PA
28
VREG_PA
31 L401
VSW_MSMC
32
VREG_MSMC
L402
37
VSW_MSME
36
VREG_MSME
10
VREG_USB
39
VREG_MMC
42
VREG_RUIM
50
VREG_MSMP
56
VREG_MSMA
64
VREG_WLAN
67
VREG_RFRX2
69
VREG_RFRX1
73
VREG_RFTX
81
VREG_SYNT
84
VREG_TCXO
R406 121K,1%
61
REF_ISET
63
REF_BYP C409 C410 C411 C412 C449
62
REF_GND
C408 100nF
8
FLSH_DRV_N
21
GP1_DRV_N
22
LCD_DRV_N
23
KPD_DRV_N
25
VIB_DRV_N
76
SPKR_IN_P
78
SPKR_IN_M
75
SPKR_OUT_P
79
SPKR_OUT_M
74
SPKR_BYP
77
VDD_SPKR
29
VDD_PA
33
VDD_MSMC
35
VDD_MSME
41
VDD_RUIM
52
VDD_MSM
54
VDD_ANA
65
VDD_WLAN
71
VDD_RF
83
VDD_MAIN
C427 C428 C429 C430 C431
9-2
VREG_MSMC_1.2V
VREG_MSME_1.8V
VREG_USB_3.3V
VREG_USIM_3.0V
VREG_MSMP_2.6V
VREG_MSMA_2.6V
VREG_BT_2.6V
VREG_SD_2.8V
C413 C414 C415 C416 C417 C418 C419 C420 C421 C422
C450
SHIELDCAN
VBATT
C432
C448
VREG_SYNT_2.65V
VREG_TCXO_2.8V
C423 C424