GH68-07387A-TSHOO-9.pdf

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9. Flow Chart of Troubleshooting
9-1 BASEBAND
9-1-1. Power ON
'Power On' does not work
Yes
Check the current
consumption more
than 100mA
No
Download again
Yes
Check the VBAT
more than 3.3V
No
Charge the Battery
Yes
①
Check the
VLDO7_1.8V
of U300 is more than
1.8V
No
Check U300 and C311
Yes
②
Check VCCD
,VCCD_1.5
of U304=1.5
No
Check C331 of U304
Yes
③
Check VRF of
U300=2.8V
No
Check U300
and C313
Yes
④
Check C139
Freq = 13MHz
Vp-p > 0.8V
No
Check the clock C139
Yes
Check the initial operation
Yes
END
9- 1
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Flow Chart of Troubleshooting
9- 2
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Flow Chart of Troubleshooting
UP_RST
R10
SIIMRST
UP_IO
P10
SIIMDATA
SIM_IO
J11
SIIM_IO
SIM_RST
K11
SIIM_RST
VRTC
SIM_CLK
K14
SIIM_CLK
VSIM
K12
VSIM
VRTC
H11
LED2_DRV
G12
VCCB
LED1_DRV
G13
KEY_BL1
VLDO7_1.8V
VCCA
VRF
VCCD
VLDO_1.5V
RING_DRV
F13
VIIB_DRV
F15
MOT
VLDO_7
C12
VLDO_6
A14
R300
VL5S_B
C9
VL5S_A
D10
VLDO_5
B10
VL4S_B
B11
DCS_TX_EN
C310
VL4S_A
A12
GSM_TX_EN
VLDO_4
B12
1.5V
VLDO_3
A13
VLDO_2
J12
VLDO_1
G11
BAT300
VACC
F14
VBAT
CSN_PSC
K8
UP_CS
SCLK_PSC
L8
UP_SCLK
SDO_PSC
N7
C311
C312
C313
C314
C315
C330
C316
UP_SDO
SDI_PSC
M7
UP_SDI
VEXT
E14
VBAT
E13
CH_BDRV
E11
VCCB
CH_ISEN
F12
CH_RES
D14
U302
ADC_AUX2
2 VO
ADC_AUX1
D15
VSS1
E10
GND
3
VREF
A10
CREF
E9
H10
RTCALARM
R331
C318
R304
VBAT
VCCD_1.5V
F300
U304
L302
1 VIN
SW
5
VCCD
2
GND
3
EN
FB
4
C329
C331
9- 3
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Flow Chart of Troubleshooting
9-2-2. Initial
Initial Failure
Yes
①
Check VCCD,
VCCD_1.8V of U300
"High" when the phone
is boot on`
No
Check U300
Yes
②
Check
the VCCD_1.6V of
U304 is "High"
No
Check U304
Yes
③
LCD display is O.K?
No
Check SLC102 and LCD part
Yes
Sound is O.K?
No
Check audio part
Yes
END
9- 4
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Flow Chart of Troubleshooting
HERA_1.8
VCCD
R103
C147
SLC102
1 1
2
LCD_CS
LED_VOUT
3
3
2
4
R139
FLASH_RESET
LCD_RS
4
5 5
6
LED1
7
7
6
8
LCD_WEN
LED2
9
9
10
LED3
10
11
12
LCD_D(1)
11
LCD_D(0)
LCD_D(2)
LCD_D(4)
LCD_D(6)
LCD_D(8)
13
13
12
14
LCD_D(3)
15
15
14
16
LCD_D(5)
16
17
LCD_D(7)
17
18
19
19
18
20
LCD_D(9)
20
21
21
22
LCD_D(11)
LCD_D(10)
23
23
22
24
LCD_D(13)
LCD_D(12)
25
25
24
26
LCD_D(15)
LCD_D(14)
27
26
27
28
C148
C150
C152
C154
28
29
29
30
30
31
31
C149
C151
C153
C155
C169
C170
C171
C156
C157
C158
C159
C160
C161
C162
C163
VR112
VR113
VR114
VR115
9- 5
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