3. Flow Chart of Troubleshooting 3-1.Baseband 3-1-1. Power ON 'Power ON' Does not work
Check the current consumption
Current consumption
NO
Down load again
≥100mA ? YES Check the battery voltage
NO
Voltage ≥ 3.3V ?
Charge the Battery
YES Check the pins of U838
NO
C215 ≥ 1.8V ?
Check U838 and C215
YES C217 and C218 = 2.8V?
NO
YES
NO
C219=1.5V?
Check U838 and C219
YES
Check the clock signal
NO
at pin #3 of TCX100
Check the clock generation circuit TCX100
Freq.=26MHz,Vrms ≥300mV YES
Check the Initial operation
END 3-1
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Flow Chart of Troubleshooting
VCCD_2.8V
VCCA_2.8V
HPEIO_1.8V
VRF_2.8V
VBAT C201
C200 C203
C202
EAR_ADC C209
SIMCLK SIMRST SIMDATA SIM_IO SIM_RST SIM_CLK
VSIM VRTC LED2_DRV LED1_DRV RING_DRV VIB_DRV VLDO_7 VLDO_6 VL5S_B VL5S_A VLDO_5 VL4S_B VL4S_A VLDO_4 VLDO_3 VLDO_2 VLDO_1 VACC
K12 H11 G12 G13 F13 F15 C12 A14 C9 D10 B10 B11 A12 B12 A13 J12 G11 F14
VSIM VCCB_2.9V
VLDO_1.8V VCCA_2.8V
VRF_2.8V VCCD_2.8V
R204
VLDO_1.5V
C214 1
DCS_TX_EN GSM_TX_EN
BAT200 TP_CSN_PSC
TP_VACC
VBAT
UP_CS UP_SCLK UP_SDO UP_SDI
C221
E14 E13 E11 F12 D14
C216
C218
C217
C219
C220
VCCB_2.9V ICHRG
ADC_AUX2 D15 ADC_AUX1 E10 VREF A10 CREF E9 RTC_ALMNH10
PWR_SW2 PWR_SW1N PSW1_B UF RESET_O MODE PWR_K EEP INTRQ VIB _RNG_EN
C215
TH200
R210 RTCALARM C230
R211
SUB_BATT
C228
C14 C15 L7 K9 N10 M9 L 10 L9
N4 RTC_CL K D1 XOENA Q R6 MC P5 A DC_A UX4 P3 DINTR
VEXT VBAT CH_BDRV CH_ISEN CH_RES
VRTC_1.5V
2
SERLE1 SERLE2 SERDA SERCK
N9 R10 P10 J11 K11 K14
C231
B4 C4 P13 L 11 F6 A6 M10 N11 P6 R2 K4 G5 J4 N5 N6 M3 J3 F11 K 15 B 15 E8 B 13 C10 GND_OCTL VDD_OCTL GNDV VDDV GNDB VDDB GNDD VDDD VSS4 VSS3 VSS2 VSS1 VDD_IO2 VDD_IO1 VDD3 VDD2 VDD1 GND_HCUR GND_PSC2 GND_PSC1 GNDQ VDD67 VDD5
B1 A2 C1 C2
UP_CLK UP_RST UP_IO SIM_IO SIM_RST SIM_CLK
R212
2 1 K 10 J 10 J9 J8 J7 H9 H8 H7 H6 G10 G9 G8 G7 F10 F9 F8 F7 D13 OCTL0 OCTL1 OCTL2 OCTL3 OCTL4 OCTL5 OCTL6 OCTL7
D9 A FC E7 TXP
SERLE SERDAT SERCLK
E6 C5 F5 E5 A4 G6 B3 A3
VDD34 C11 VDD12 J13
CSN_PSC K8 SCLK_PSC L8 SDO_PSC N7 SDI_PSC M7
A OUTA P A OUTA N A OUTB P A OUTB N MICINP MICINN MICOUTP MICOUTN A UXINP A UXINN A UXOUTP A UXOUTN VXVCM VREGP VREGN DA ICK DA IRN DA IDI DA IDO
BAND_SEL MOD_SEL TX_EN XOENA SX_EN PAC_EN RX_EN
U838
P11 N12 R12 P12 N14 M14 N15 P15 M15 L 14 K 13 L 13 R13 M13 R14 R4 P4 L6 M6
R205
DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 AB8 AB7 AB6 AB5 AB4 AB3 AB2 AB1 AB0 I|O RWN RESETN_CSP
RA REF2 RA REF1 RXTXIP RXTXIN RXTXQP RXTXQN
T_DSP_IO
C223
J IG_ON PWR_ON PSW1_B UF
DSP_INT
CL K 32K XOENA Q CL K 13M_CSP
A OUTA P A OUTA N A OUTB P A OUTB N MICINP MICINN MICOUTP MICOUTN A UXINP A UXINN A UXOUTP A UXOUTN
RTX_IP RTX_IN RTX_QP RTX_QN
C233
C232
VBAT
A FC VA PC
DSP_IO DSP_RWN FLASH_RESET
D2 D3 E3 E2 F3 F2 F1 F4 G4 G3 H5 J6 J5 K3 K2 K1 K5 K7 M1 M2 N2 N1 L5 P1 K6 L3 L2 R3
B5 B6 D7 D6 C7 C6
DSP_AB(0:8)
DSP_DB(15) DSP_DB(14) DSP_DB(13) DSP_DB(12) DSP_DB(11) DSP_DB(10) DSP_DB(9) DSP_DB(8) DSP_DB(7) DSP_DB(6) DSP_DB(5) DSP_DB(4) DSP_DB(3) DSP_DB(2) DSP_DB(1) DSP_DB(0) DSP_AB(8) DSP_AB(7) DSP_AB(6) DSP_AB(5) DSP_AB(4) DSP_AB(3) DSP_AB(2) DSP_AB(1) DSP_AB(0)
NC6 NC5 GNDS17 GNDS16 GNDS15 GNDS14 GNDS13 GNDS12 GNDS11 GNDS10 GNDS9 GNDS8 GNDS7 GNDS6 GNDS5 GNDS4 GNDS3 GNDS2 GNDS1 A UX_A DC3
DSP_DB(0:15)
INTRQ PWR_KEEP RST R214
VRF_2.8V
R111
R112 AFC C125
R113
C126
CLK26M C129
3-2
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Flow Chart of Troubleshooting
3-3
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Flow Chart of Troubleshooting
3-1-2. Initial
Initial Failure
NO
The voltage at the C215=1.8V? The voltage at the C218=2.8V?
Check the U838 (If it has some problem, it has to be replaced.)
YES
NO
The voltage at the VR301 " Low --> High" ?
Check the U838 (If it has some problem, it has to be replaced.)
YES
NO
There is 32.768KHz wave
Check the UCP300
form at the C317, C318 ?
YES The voltage is 2.8V
NO
Check the U838
at the C216,C217,C218 ? YES NO
LCD Display OK ?
Check the LCD part
YES NO
Sound operation OK ?
Check the Audio part
YES END
3-4
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Flow Chart of Troubleshooting
HP_CORE_1.57V
HP_CORE_1.57V
VRTC_1.5V
HPEIO_1.8V
C303
C302
C305
C304 C306
C307
C308
C309
C310
C311
D(0:15)
CP_WEN CP_OEN FLASH_RESET ROM1_CS ROM2_CS RAM1_CS MV_CS
B7 C8 D8 A6 C6 C5 D7 E7 C4 C2 A3 B3 B1 D6 D5 D3 E8 F8 E6 D2 E4 E3 F5 F4 F3 F2 A8 E9 F9 G10 G11 F11 E11 G12 D11 E12 C12 A12 F12 D12 E13 D13 D14 B14 E14 H14 A14 C15 G14 J14 D15 C16 F15 B17 H16 A17
D(0) D(1) D(2) D(3) D(4) D(5) D(6) D(7) D(8) D(9) D(10) D(11) D(12) D(13) D(14) D(15)
TP_WEN TP_OEN
TP_ROM1_CS
TP_RAM1_CS TP_MV_CS
TDO TDI TCK CKO_IACK IOBIT1_PIO06 IOBIT0_PIO05 SPFS1_PIO15 SPTXD1_I2SD_PIO16 SPRXD1_PIO17 SPCLK1_PIO18 INT0 IO RWN D_D15 D_D14 D_D13 D_D12 D_D11 D_D10 D_D9 D_D8 D_D7 D_D6 D_D5 D_D4 D_D3 D_D2 D_D1 D_D0 D_A8 D_A7 D_A6 D_A5 D_A4 D_A3 D_A2 D_A1 D_A0 TEST3 TEST2 TEST1 CPTSTSTOP_CKO ATDO_PWM2 ATDI_RTS1 ATCK_CTS1 ATMS_PIO45 PIO31_IRQ6 PIO00_IRQ5 IRQ4 IRQ3 IRQ2 IRQ1 PIO47 PIO34 PIO33
UCP300
T12 V14 U14 N12 N11 V12 N15 N16 M17 M18 T15 W6 V6 P11 N10 N9 N8 P9 P8 R9 T9 T8 U8 V8 R8 T7 R7 T6 U6 R6 N6 V4 T5 U4 V3 W3 W2 V1 V16 T14 U15 T17 T13 L5 M4 K12 P12 P16
DSP_DB(15) DSP_DB(14) DSP_DB(13) DSP_DB(12) DSP_DB(11) DSP_DB(10) DSP_DB(9) DSP_DB(8) DSP_DB(7) DSP_DB(6) DSP_DB(5) DSP_DB(4) DSP_DB(3) DSP_DB(2) DSP_DB(1) DSP_DB(0)
HOLD KEY_EL_ON PCM_SYNC PCM_IN PCM_OUT PCM_CLK DSP_INT DSP_IO DSP_RWN
GND
R304
TDO TDI TCK TMS
CP_TDO CP_TDI CP_TCK CP_TMS R_RW CARD_INS
P18 P17 M19 M16 J16 R14 U18
MV_INT JACK_IN INTRQ MODE_SELECT USB_CON LCD_CON
SIMCLK SIMDATA SIMRST
CHG_OFF EAR_SWITCH MVCORE_ON MP3_ENABLE MIC_AMP_EN
USB_SUSP USB_DET D_SCL_HPE USB_VPO USB_VMO USB_OEN USB_DATA
DAC_RESET SUB_BATT_SW XOENAQ PWR_KEEP CLK32K RTCALARM
UP_SCLK UP_SDO UP_SDI UP_CS
USB_ON
AMP_EN D_SDA_HPE BT_CTS BT_TXD BT_RXD BT_RTS BT_EN
C317
C318
OSC300 RADIO_SEL VIB_EN SDS_TXD SDS_RXD KEY_COL(0:4)
CHG_DET MP3_SDA MP3_SCL CF
HPEIO_1.8V
KEY_COL(0) KEY_COL(1) KEY_COL(2) KEY_COL(3) KEY_COL(4)
PSW1_BUF
KEY_ROW(0:4)
R323
KEY_ROW(0) KEY_ROW(1) KEY_ROW(2) KEY_ROW(3) KEY_ROW(4)
R324
D_SCL D_SDA MV_RST VBUS_GPIO FLIPPER_USB
R325 R326
R327
3-5
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DSP_DB(0:15)
DSP_AB(0:8)
DSP_AB(8) DSP_AB(7) DSP_AB(6) DSP_AB(5) DSP_AB(4) DSP_AB(3) DSP_AB(2) DSP_AB(1) DSP_AB(0)
P4 T2 P5 B19 C19 C18 D17 E16 F16 E17 R3 R4 U2 T3 P3 P2 N4 N2 M3 M1 M6 N5 R16 R17 K7 L6 J7 J6 J5 J4 J8 H6 H4 H1 H3 G6 G4 H2 J15 J13 K13 L12 L13 L15 L14 M14 N14 H19 F19 H17 G16 P15 P19 G5 V17 V19 U16 U19 W17 R13
LOWER_BYTE UPPER_BYTE
A_A0 A_A1 A_A2 A_A3 A_A4 A_A5 A_A6 A_A7 A_A8 A_A9 A_A10 A_A11 A_A12 A_A13 A_A14 A_A15 A_A16 A_A17 A_A18 A_A19 A_A20 A_A21 A_A22 A_A23 A_A24 PIO35_A_A25_BOOTSEL A_D0 A_D1 A_D2 A_D3 A_D4 A_D5 A_D6 A_D7 A_D8 A_D9 A_D10 A_D11 A_D12 A_D13 A_D14 A_D15 A_WEN A_OEN PIO30_WAITN FLASHRSTN A_CS0N A_CS1N A_CS2N A_CS3N A_CS4N A_CS5N A_CS6N A_CS7N A_BE0N A_BE1N
SIMCLK SIMIO PIO14_SIMRST PIO07_USB_SUSP PIO09_USB_VPI PIO11_USB_VMI PIO12_USB_VPO PIO13_USB_VMO PIO36_USB_OEN PIO37_USB_DATA SPCLK0 SPRXD0 SPTXD0_I2SD SPFS0 RIO_PIO01 DSR0_PIO02 DTR0_PIO03 RTS0_PIO04 TX0 RX0_IRQ28 CTS0_PIO29 DCD0_PIO44 PIO41_IRDATX PIO42_IRDARX TX1 RX1_IRQ28 KEYBRD0 KEYBRD1 KEYBRD2 KEYBRD3 KEYBRD4 KEYBRD5_PSW1_BUF KEYBRD6 KEYBRD7 KEYBRD8 KEYBRD9 KEYBRD10 KEYBRD11 PIO38_MCI_CLK PIO08_MCI_CMD PIO21_MCI_DAT0 PIO22_MCI_DAT1 PIO23_MCI_DAT2 PIO24_MCI_DAT3 PIO39_MCI_CMD_EN PIO40_MCI_DAT_EN PIO43_MCI_DAT0_EN X1RTC X2RTC RTCALARMN OSC32OUT PIO19_PWRKEEP PIO20_SYSCLKREQ PWM1_PIO46 PIO10 PIO25 PIO26 PIO27 PIO28 PIO32
A(0) A(1) A(2) A(3) A(4) A(5) A(6) A(7) A(8) A(9) A(10) A(11) A(12) A(13) A(14) A(15) A(16) A(17) A(18) A(19) A(20) A(21) A(22) A(23) A(24)
VSSA_U VDDA_U VSSA_D VDDA_D VSS18 VSS17 VSS16 VSS15 VSS14 VSS13 VSS12 VSS11 VSS10 VSS9 VSS8 VSS7 VSS6 VSS5 VSS4 VSS3 VSS2 VSS1 VDD_CORE8 VDD_CORE7 VDD_CORE6 VDD_CORE5 VDD_CORE4 VDD_CORE3 VDD_CORE2 VDD_CORE1 VDD_IO_1P8_18 VDD_IO_1P8_17 VDD_IO_1P8_16 VDD_IO_1P8_15 VDD_IO_1P8_14 VDD_IO_1P8_13 VDD_IO_1P8_12 VDD_IO_1P8_11 VDD_IO_1P8_10 VDD_IO_1P8_9 VDD_IO_1P8_8 VDD_IO_1P8_7 VDD_IO_1P8_6 VDD_IO_1P8_5 VDD_IO_1P8_4 VDD_IO_1P8_3 VDD_IO_1P8_2 VDD_IO_1P8_1 VRTC CKI RESTN TMS TRSTN
NC2 NC1
2 1
A(0:25)
F18 F17 R11 T11 M12 M11 M10 M9 M8 L8 L7 K8 J12 H12 H11 H10 H9 H8 G9 G8 A18 A2 V13 V7 N18 M2 H18 G2 B13 B8 W18 W8 U12 U5 U1 T18 P1 L16 L4 F1 D18 D9 C14 C1 B16 B12 B6 B4 G18 W12 G15 W14 R12
CLK13M_HPE TR_RST
Flow Chart of Troubleshooting
3-6
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Flow Chart of Troubleshooting
3-1-3. Charging
Abnormal charging part
The pin #19,20 of IFC 502 VEXT ≥ 5V?
NO Replace TA, Check IFC502
YES
The pin #5 of U200 is "low"?
NO check the U200,R255
YES
NO
The pin #10 of U200 3.5 ~ 4.2V?
check the U200
YES
The pin #4 of U839 is "High"?
NO check the U839
YES END
3-7
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Flow Chart of Troubleshooting
3-8
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Flow Chart of Troubleshooting
3-9
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Flow Chart of Troubleshooting
3-1-4. Sim Part
"Insert SIM" is displayed on the LCD
NO
The voltage is 2.8V
Check the U838
at the pin #6 of SIM200?
YES
NO
Is there any signal pin #1,2,4 of SIM200 ?
Check the U838 & UCP300
YES
Check the SIM Card
END
3-10
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Flow Chart of Troubleshooting
SIM200 1 1 2 2 3 3 4 4 5 5 6 6 7 NC 8 NC
SIM_IO SIM_CLK SIM_RST VSIM
C208
C204
C205
C206
C207
3-11
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Flow Chart of Troubleshooting
3-1-5. Speaker Part There is no sound from speaker
NO
Is the terminal of speaker O.K?
Replace the speaker
YES NO
Are there any signal at the pin #1, 3 of CN400?
Check the CN400
YES
Are there any signal at the pin #J4,J5 of UCD400? YES
NO
the voltage of L400 is 3.3V?
check R414, R415? NO
YES Check U202 the voltage of C247 is 1.8V?
NO
Check U208
YES
Are there any signal at the pin #G8,F9,G9 of UCD400?
NO
Check UCP400
YES
Check U838
END
3-12
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Flow Chart of Troubleshooting
VBAT
L401
VSS
C450
R442
A1
VIP
C451
R443
C1
VIM
U403
L402 VOM
A3
PVSS
B3
VOP
C3
SAPA_N
SAPA_P
NC
DAC_SPKM
A2
C2 EN B2 PVDD NC
DAC_SPKP
B1 VDD
L403
1 2 C452
C453
AMP_EN R446 R447 R448 TA400 C458
VBAT
C448
C449
U401 1 V+
SAPA_P
AMP_EN
SPK_N
IN2 8
4 IN1
NC2 7
5 NC1
GND 6
R445
SAPA_N
COM2 9
3 COM1
SPK_P
AOUTAP
NO2 10
2 NO1
AOUTAN R444
GND 11
C455
C454
SPK_P SPK_N MOT_3.3V
3-13
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1 3 5 7 9
CN400 1 2 2 3 4 4 5 6 6 8 8 7 9 10 10 NC NC 11 12
Flow Chart of Troubleshooting
3-14
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Flow Chart of Troubleshooting
3-1-6. Camera Part Camera function does not work
NO
Check the connect CN503?
Connect the CN503
YES NO
Pin #5 of U208= 1.8V?
Check the U208&L201
YES YES Pin #4 of U205 = 2.8V?
NO
Pin #1 of U205 = High?
YES
Pin#3 of OSC400 is 24MHz?
NO
Replace OSC400 and check UCP300
YES
Is that clock signal at the
NO
pin #3 of CN503? YES
Pin#13 of CN503 is High?
NO
Check UCP400
END
3-15
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NO
Check UCP300
Flow Chart of Troubleshooting
VCAM_2.8V
L500
C510
VCAM_1.5V
CAM_MCLK CAM_SCL
Y(7) Y(6)
CAM_SDA HSYNC CAM_RESET VSYNC Y(0) Y(1)
Y(5) Y(4)
L501
VLDO_1.5V
C527
HPEIO_1.8V
3
F200
2
1
VBAT
C520 VR547
C519
VR546
C518
VR545
C517
VR544
C516
VR543
C515
VR542
C514
VR540
C513
BLM15AG102SN1D
Y(3) Y(2) CAM_PCLK
U208 1 VIN
SW 5
L201
2 GND 3 EN
FB 4 C247
TA205
VBAT
VCAM_2.8V
U205
VCAM_EN
3
VIN
2
GND
1
STBY
VOUT NC
C245
GND 6
3-16
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4 5
C243
Flow Chart of Troubleshooting
3-17
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Flow Chart of Troubleshooting
3-1-7. Mp3 Part
There is no MP3 sound from Earphone
Are there any signal at the pin #9 of CN502?
YES
Replace the Earphone
NO
Are there any signal at the pin #5,7 of CN502?
YES
Check C422, C423 and VR526, VR527
NO
Are there any signal at the pin #C8,D8 of UCD400?
YES
The voltage of L400 is 3.3V?
NO
YES
Check UCD400
NO
The voltage of C237 is 3.3
NO
The voltage of R213 is 1.8
YES
NO
Check the UCD400
Check U838
END
Check the CN502
Check the UCP300
END
3-18
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YES
Check U202
Flow Chart of Troubleshooting
DAC_3.3V
HPEIO_1.8V
B2 A2 A1 B3
FMA_R FMA_L
A9 A8 B9 B8
C428 1UF C429
C430 1UF
MICN
AOUTBP AOUTBN C436
C432
B4 A3 A4 B5 B7 B6 A6 A5
R416 R417
C431
IOVDD VDDA 1 VDDA 1 VDDA 1 DVDD A VDDA 2
C434
C433
C437
GPIO2 GPIO1 MICDET MICBIAS DOUT DIN MIC3R MIC3L UCD400 SELECT MFP3 SDA TLV320AIC33IZQER MFP2 SCL MFP1 /RESET MFP0 MCLK WCLK BCLK LINE2RP LINE2RM LINE2LP NC LINE2LM NC NC LINE1RP LINE1RM LINE1LP LINE1LM
HPEIO_1.8VVCCD_2.8V
C422
G1 F1 D1 E1
C423
IF_EAR_R IF_EAR_L
J8 J9 F8 E9 E8 D8 C8 H8 G8 F9 G9
D_SDIN D_SDOUT
D_SDA D_SCL DAC_RESET D_MSCK D_LRCK D_BCK
1 2 A7
DVSS DRVSS DRVSS A VSS_DA C A VSS_DA C A VSS_A DC A VSS_A DC
R414
HPROUT HPRCOM HPLOUT HPLCOM
RIGHT_LOP RIGHT_LOM LEFT_LOP LEFT_LOM MONO_LOP MONO_LOM
D9 E2 F2 G2 H2 C2 D2
TA 401
J6 J7 J4 J5 J2 J3
R415
DAC_SPKP DAC_SPKM CSP_MICP CSP_MICN
MICP
C419
C9 B1 C1 H1 H9 J1
C425
C424
VCCA_2.8V
C421
C418
C459
C420
L400
USB_5V VBAT
R504 R505
R506
100K
100K
R507
180K CN502 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
FM_ANT EAR_MIC_P EAR_MIC_N IF_EAR_R IF_EAR_L EAR_SWITCH JACK_IN EAR_ADC T_OPT SDS_RXD
R508 R509
R510 R511
JIG_ON_IF USB_D+ USB_DTA_VEXT
C529
HPEIO_1.8V
VBAT
DAC_3.3V
U202
R213
3 VIN
VOUT 4
2 GND 1 STBY 25 NC 26 NC 27 NC 28 NC
C236
C530
C528
ZD504
ZD505
C531
VR529
VR528
VR527
VR526
VR525
VR524
VR523
VR521
VR522
VR520
R512
ZD503
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 NC NC NC NC
3-19
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GND 6
NC 5 C237
Flow Chart of Troubleshooting
3-20
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Flow Chart of Troubleshooting
3-1-8. External Battery
The SGH-F300 does not detect the external battery Check the state of the 3-pin connector between SGH-F300 and External battery, External battery voltage.
Check the state of 3-pin connector In external battery is OK?
NO
Replace the external battery
YES Check the voltage of External Battery
NO
Replace the external battery
Vext > 3.2 ? YES Check the voltage of External Battery
NO
Replace the 3-pin connector in SGH-F300
Vext > 3.2 ? YES END
3-21
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Flow Chart of Troubleshooting
G N D V f V ex t Pin A r r ay of ex ter nal batter y
T he 3-pin connector of S G H -F300
T he 3-pin connector of ex ter nal batter y
3-22
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Flow Chart of Troubleshooting
3-1-9. BLUETOOTH
BT connection disable
Check the S/W
check BT function ON
Is the Antenna of BT OK?
Change BT Antenna
check the BT_EN R120 R120 is High?
replace UCP300
Is the voltage 1.8V at C140 or at pin#3 of U103
Change BT Antenna
END
3-23
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Flow Chart of Troubleshooting
3-24
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Flow Chart of Troubleshooting
Layout
ㅠㅂ
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Flow Chart of Troubleshooting
3-2.RF 3-2-1. EGSM RX Continuous RX ON RF Input : 62 CH AMP : -50dBm
NO
NORMAL CONDITION Catch the channel ?
Check soldered status of R121
YES NO
DUF100 Check Pin #13 ≥ -65dBm ?
RFS100, C103, L100 Resolder or Change
YES
NO
DUF100 Check Pin #5,6 ≥ -65dBm ?
DUF100 Resolder or Change
YES NO
U100 Check Pin#6, 7 ≥ -65dBm ?
Check soldered status of L102, L103, C112
YES
U100 Check Pin#34 =Clean 2.8V?
NO
C106 Check or resolder
YES U100 Check Pin#35,36,37,38=100mV?
NO
YES
U100 Check Pin #21 : 26MHz ? Vpp : 1.1V?
NO
R113 = 26MHz ? Vpp = 1.2V?
NO
YES
YES
U100 Change or resolder
C125, C129 resolder
Check U838
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NO R111 = 2.8V ? YES
TCX100 Change or resolder
Flow Chart of Troubleshooting
3-2-2. DCS RX Continuous RX ON RF Input : 660 CH AMP : -50dBm
NO
NORMAL CONDITION Catch the channel ?
Check soldered status of R121
YES
NO
DUF100 Check Pin #13 ≥ -65dBm ?
RFS100, C103, L100 Resolder or Change
YES NO
DUF100 Check Pin #3,4 ≥ -65dBm ?
DUF100 Resolder or Change
YES
NO
U100 Check Pin#8,9 ≥ -65dBm ?
Check soldered status of L104, L105
YES
NO
U100 Check Pin#34 =Clean 2.8V?
C106 Check or resolder
YES U100 Check Pin#35,36,37,38=100mV?
NO
YES NO U100 Check Pin #21 : 26MHz ? Vpp : 1.1V?
NO
YES
R113 = 26MHz ? Vpp : 1.2V?
NO
YES
U100 Change or resolder
C125, C129 resolder
Check U838
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R111 = 2.8V ? YES
TCX100 Change or resolder
Flow Chart of Troubleshooting
3-2-3. PCS RX Continuous RX ON RF Input : 660 CH AMP : -50dBm
NO
NORMAL CONDITION Catch the channel ?
Check soldered status of R121
YES
NO
DUF100 Check Pin #13 ≥ -65dBm ?
RFS100, C103, L100 Resolder or Change
YES
NO
DUF100 Check Pin #8,9 ≥ -65dBm ?
DUF100 Resolder or Change
YES
NO
UCP100 Check Pin#1,2 ≥ -65dBm ?
Check soldered status of L106, L107
YES U100 Check Pin#34 =Clean 2.8V?
NO
C106 Check or resolder
YES
U100 Check Pin#35,36,37,38=100mV?
NO
YES U100 Check Pin #21 : 26MHz ? Vpp : 1.1V?
NO
YES
Check U838
R113 = 26MHz ? Vpp : 1.2V?
NO
YES
U100 Change or resolder
C125, C129 resolder
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NO R111 = 2.8V ? YES
TCX100 Change or resolder
Flow Chart of Troubleshooting
TP
R121
C101
ANT
C102
VBAT TP
RTX_QP RTX_QN RTX_IN RTX_IP MOD_SEL
C103
GSM74137_OUT DCS74137_OUT
39
38
40
41
36
37
35
32
34
L100
33
VRF_2.8V
GN D 900LNA_N 900LNA_P 1800LNA_N
LATCHENABLE
4 5 6
GSM_TX_EN DCS_TX_EN
7 8 9 10
L102
11
RXENA
L103 L104
RX_EN TX_FB VAPC
R108
R107
GSM_OUT DPCS_OUT C112
12
VCC4
1900LNA_P
14
20
C114
1900LNA_N
13
XTAL
TXRFIN
VCC2
1800LNA_P
15
DATAIN
TX_EN VPC
2
C113
U100
SXENA CLK
1
3
SAT_DET
L105
C117
L106
C122
C124
C121 L107
C123
13M_BUF
VRF_2.8V
R111
R112 AFC C125
R113
C126
CLK26M C129
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C115
TXH B
TXL B
QP|TX_QP
QM|TX_QM
IM| TX_IM
850LNA_P
COMPP
21
CHIPENA
COMPN
22
850LNA_N
VA PC
23
NC
18
24
VPC
17
25
TXENA
NC
XTUNE
CLK26M
26
VCC1
NC
16
XOENA SX_EN SERCLK SERLE SERDAT
27
NC
L PFAD J
28
19
29
L OM ON
VCC3 30
13MHZ_26MHZ| XB UF
31
IP|TX_IP
C106 C107 C108
VDIGEN A
C105
Flow Chart of Troubleshooting
3-30
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Flow Chart of Troubleshooting
3-2-4. EGSM TX
DUF100 Pin#13 About 2~3 dBm?
NO
U838 Check & Change
YES
YES DUF100, C103 Check & Change
NO
DUF100 Pin#11 = High?
Level of DUF100 Pin#10 is 4~5dBm ?
NO
Continuous TX ON condition TX Power Code : 500 code Applied CH : 62 RBW : 100KHz VBW : 100KHz SPAN : 10MHz REF. Level : 10dBm ATT. : 20dB
YES DUF100 Check & Change
NO
C120 >= 3.7V?
Check the Battery Block
YES Level of PAM100 Pin #6 is 1.2V?
NO
Check U838 TXP OK ?
YES
YES
NO
U838 Check & Change
YES
PAM100 pin#12 About -5 dBm? NO
PAM100 pin#7 High ?
NO
Check U838
YES Change PAM100
NO
C106 ≥ 2.8V ?
C105,107,108,U838 Check or resolder
YES
U100 Check Pin #21 : 26MHz ? Vpp : 1.1V?
NO
R113 = 26MHz ? Vpp : 1.2V?
U100 Pin #34, = 2.8V?
R111 = 2.8V ?
YES
YES NO
NO
C125, C129 resolder
YES TCX100 Change or resolder
YES
Check U838
Change PAM100
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NO
Flow Chart of Troubleshooting
3-2-5. DCS/PCS TX
DUF100 Pin#13 About 2~3 dBm?
NO
YES DUF100, C103 Check & Change
NO
DUF100 Pin#9 = High?
U838 Check & Change
YES Level of DUF100 Pin#8 is 4~5dBm ?
NO
Continuous TX ON condition TX Power Code : 500 code Applied CH : 698 RBW : 100KHz VBW : 100KHz SPAN : 10MHz REF. Level : 10dBm ATT. : 20dB
YES DUF100 Check & Change
NO
C120 >= 3.7V?
Check the Battery Block
YES Level of PAM100 Pin #6 is 1.2V?
NO
Check U838 TXP OK ?
YES
YES
NO
U838 Check & Change
YES
PAM100 pin#14 About -5 dBm? NO
PAM100 pin#2 High ?
NO
Check U838
YES Change PAM100
C106 ≥ 2.8V ?
NO
C105,107,108,U838 Check or resolder
YES
U100 Check Pin #21 : 26MHz ? Vpp : 1.1V?
NO
R113 = 26MHz ? Vpp : 1.2V?
U100 Pin #34, = 2.8V?
R111 = 2.8V ?
YES
YES NO
NO
C125, C129 resolder
YES TCX100 Change or resolder
YES
Check U838
Change PAM100
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NO
Flow Chart of Troubleshooting
VBAT
PAM100
4 VSUP
DPCS_OUT
GND 9
GSM_OUT
C 120
GND 17
L101
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R105
GND 10
8 RSVD
C 119
7 GSMIN
C 118
C109 R103
R 109
GND 11
C116
6 VPC
R110
SAT_DET
GSM_OUT 12
R102
R106
GSM74137_OUT
R101
GND 13
C111
5 VBATT VPC
TX_FB
GND 15
DCS|PCS_OUT 14
3 BS
BAND_SEL
R100
COUP_OUT 16
2 DCS|PCS_IN
C104
C110
PAC_EN DCS74137_OUT
R104
1 ENA
