Samsung A310F TROUBLESHOOTING GUIDE
8. Level 3 Repair
8-2. Block Diagram
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8. Level 3 Repair
8-3. Flow Chart of Troubleshooting
Oscilloscope Digital Multimeter
Power Supply + driver, ESD Safe Tweezer
8960 & Spectrum Analyzer Soldering iron
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8. Level 3 Repair
TOP
BH203
BH205
ANT605
C618
U603
C615
R613
GA201
ANT606
R618
C625
D600
GA203
C626
U601
BH202
TP_BT_WLAN_SLEEP_CLK
TP_ACC_INT
R614
R430
R431
C613
C612
U602
C614
GA206
BH206
U600
C604
GA202
ANT607 ANT609
C608
R600
R601
R602
R607
C606
C601
C607
R620
GA205
BH208
BTC500
TP_CLK_500
TP_GPS_CLK_300
C303
C302
C315
L603
VR600
R616
C621C622
VR601
R617
L605
GA204
C5007
BH209
TP517
TP525
TP531
TP529
TP528
SC202
TP700
TP701
HDC700
TP524
TP522
TP519
TP527
TP521
TP518
TP520
TP526
TP523
TP530
TP532
BH207
OSC300
C310
U302
L303
F300
C320
C308
C309
C304 C305
TP_GPS_TXD
TP_GPS_CTS
TP_GPS_RTS
TP_GPS_RXD
TP_GPS_PWON
C708
C710
C709
C704
C711
C705
R700
R405
R406
R407
R408
R422
R401
R402
R403
R404
R421
R419
R420
R442
R432
R433
C465
R413
R412
R439
R428
R429
C418
TH400
R508
C408C409
C424
R415
TP407
TP409
TP406
TP503
TP_MODEM_CLK_400
TP_MODEM_TO_CLK_400
TP504
R418
SC204
TP500
R506R507
C530
C525
UME500
HDC600
L302
L304
L305
C723
L703
GA200
C721
L702
U700
C719
C727 C728
C725
SC200
L706
L705
C724
C716
TP514
R435
C352
R310
R409
C421
R530
TP509
R527
R441
C423
U504
TP513
C5006
C406
UCP400
R449R450 R451
C474C487C488
C410
C605
L601
C602
R610
R612
C720
C722
TP_UB400
TP_TCXO_EN
TP515
TP505
TP510
TP516
TP400
TP408
C426
BH204
TP402
C405
C427
C420
R701
C701
C706
L700
TP_AP_500
C460
R410
R448
C471
R446
C456
C459
R411
C419
R447
C472
C473
R443
TP502
TP506
R723
C576
R707
TP403
TP501
C522
C523
R521
ZD504
R518
ZD503
R520
ZD506
R517
ZD502
R519
ZD505
R516
ZD501
C526
C5000
C599
R525
C5001
R523
ZD508
R522
C5002
ZD510
ZD509
ZD511
ZD512
ZD507
SIM500
L709
ZD707
ZD706
C734
BH200
C737
R720
C743
ZD704
HDC703
ZD700
ZD703
Q700
R704
R721
ZD708
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R425
R426
R706
R712
R713
C742
BH201
R703
C741
C740
R705
8. Level 3 Repair
BOTTOM
TP203
ANT207
HDC702
C467
C485
C468
C466
C555
C543
C547
C548
C506
C553
C538
C549
C554
C502
L221
C501
L220
L219
U104
L148
L150
C176
C178
L147
L149
C187
U103
C177
C179
C180
C181
C151
C156
C153
L131
L130
C150
C155
C152
C121
C122
C137
C138
L121
L117
C139
VR205
ANT205
R515
C598
C595
R416
U502
C597
R417
TP508
R709
ZD709
ANT201
VR202
VR201
C261
C258
C238
C240
C241
VR207
TP325
C319
U301
L300
TP401
R400
ANT601
ANT600
C443
C431
C453
C452
C446
R619
C444
C477
C484
C627
C563
C570
C480
C482
SC205
C481
C475
C483
C478
C479
L505
C476
C511
C510
R512
C564
R509
R510
C571
R511
C565
L507
C577
C519
C552
C514
C550
C533
C578
C507
C515
C531
C407
C532
C546
C540
C518
C542
C551
C513
C572C573
C486
C512
OSC500
C545
C537
C508
C534
C544
TCX200
C207
R201
C204
R203
TP202
C259
R208
L215
C264
TP200
TP201
C257
C255
C256
C260
R209
C254
C253
C250
C249
U202
C247
C248
L155
C173
L116
L134
C188
C189
U101
L124
C133
C166
C182
C183
L119 L120
C158
C123
C168
L153
L112
SC206
C124
C134
U100
C147
C148
C120
C109
C142
C118
L128L129
C126
C136
C106
L123
C144
C119
L122
L118
C141
C108
PAM100
C190
C191
C114
C115
C116
C117
C125
C127
C135
TP512
C739
TP511
TP507
U701
C738
C594
C596
R715
R714
C732
L712
ANT610
ANT608
ANT202
C242
C239
L212
L301
F203
L216
VR204
ANT204
C726
C717
F701F703
L704
C718
C712
L701
C713
C714
C715
F705
R702
R500R501
C556
R504
R503
C520
L500
C521
C412
L501
C440
C422
C436
C402
C404
C403
C401
C400
C435
C454
C455
C457
C566
L502
L503
C567
U501
R514
C584
C586
C580
C582
C588
R513
C583
C208
R210
L214
C252
C213
C243
C218
C263
L201
C244
C262
L203
L204
C235
C245
C246
L139
L125
C102
L105
L127
L107
C101
F100
C149
C110
C100
L113 L114L115
C105
C143
L103
C154
R104
L102
C103
R102
L100
R103
L106
L101
C130
C129
TH200
R202
C234
C128
C749
R716
C750
C731
R708
C735
C733
C748
HDC701
R424
R423
L210
L213
F204
F201
C524
U500
C528 C529
C527
R502
C442
C417
C428
C414
C415
C438
C430
C433
C441
C434
C437
C451
C450
C447
C568
L504
C569
C592
C517
C593
C589
C539
C561
C587
C747
R719
L206
C251
C227
C229
C232
L207
C172
C140
C145
F101
C146
L126
L104
C104
C157
L132L133
L109
L108
C107
CPL100
L111
R101
R535
R536
R537
R440
R438
R718
C590
C746
ZD701 ZD702
C730
L707
L711
C617
ZD705
C616
C619
L713
C620
C702
C707
C703
C217
R200
C209
C210C211
C214
C212
C215
C535
C557
R505
R436
R437
C558
C463
C439
C413
C432
C416
C411
C429
C464
C449
C448
C458
C445
C581
L508
C579
L506
C575
C503
C574
C536
L609
C560
C562
C541
C516
C559
C585
D700
U604
TP_COVER_INT
C610
R604
R606
R609
L602
C611
L151
C184
SC201
C186
L152
L144
F102
L138
L140
C165
C167
F103
C161
C112
C113
C111
L110
R710
C591
C745
L708
L710
C729
R717
C700
C237
C236
L209
L205
L211
U201
C5005
U503
C5004
ZD500
R534
R533
C461
C462
C425
C505
C500
C504
C509
Q500
D500
C5003
C5008
R529
R526
R531
R532
Q501
R528
L608
L607
Q600
R605
R608
C600
C609
L600
C185
U105
L154
L146
F104
L142
L137
L141
C162
L136
C163
U102
C160
C171
L135
C170
C169
RFS100
C736
ANT200
VR200
C228
C230
C233
U200
C231
C224
L202
C223
L217
C205
C200
C201
L218
F200
C206
C202
C203
C221
C222
C226
F202
C219
C220
C225
L200
C216
C623
C629
R611
C603
TP102TP103
L145
L143
C175
C174
C164
C159
C332
C336
L308
R308
R309
C337
OSC301
C333
TP311 TP312
TP324
C300
R300
U300
C301
R302
C316
C322
C328
C324
C329
C340
R307
C344
U304
C334
C341
SC203
C350
L313
TP310
TP313
TP317
TP322
TP323
TP314 TP315
TP318 TP319
TP309
TP316
TP321
LED500
TP_NFC_CLK_REQ
TP303
TP300
C330
C314
TP306
TP308
TP307
C318
C323
U303
L306L307
C327
C306
C313
C325
C331
ANT300
C351
C348
C335
C339
L315
C349
L314
C338
C353
U702
TP301
TP304TP305
C311
TP302
R305 R306
C307
C321
C312
C317
C326
VR300
L309
C343
L310
L318
C345
C347
C342
C346
L312
L317
L316
F301
VOL602
L610
C624
L611
C628
ANT206
VR206
VOL603
VOL604
ANT203
VR203
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g
8. Level 3 Repair
8-4. Power On
Mobile phone does not power on.
Check the Battery
Is it more than 3.8V?
Voltage.
Yes
Power-on the phone and
check the power-on sound
or motor Vibration.
Sound or Vibration is ok?
No
Check the voltage level at
ANT601 or R619 while
pressing power key.
Is the volta
Check the signal of
PMIC_PWR_HOLD
(TP403 = 1.8V)
Check the Clock TCX200
Is the frequency 26Mhz?
check the initial operation
e high?
Yes
Yes
Yes
Yes
No
If its voltage level is extremely low(under 3.0V),
Yes
Abnormal
Charging the battery by TA.
Change the battery.
Change the FRONT-LCD ASSY
Replace the POWER KEY FPCB.
Check the output voltage of U501
No
No
(C563 >1.0V, C566 > 1.0V, C568 > 1.0V, C570 > 1.0V,
C574 > 1.3V, C578 > 1.9V, C581 > 1.0V)
If the output voltage is not normal, Change the U501.
※ Each voltage level has ±10% margin.
Replace the TCX200.
※ Test condition (Oscilloscope setting)
: 20.0us.div (time division)
END
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(
)
8. Level 3 Repair
8-4-2. Initial
Initial Failure.
Yes
Re-download latest
SW on the mobile
Re Check "8-4-1 Power on"
Trouble shooting process
Change UCP400
Change PBA
phone.
END
Abnormal
Normal
Abnormal
Abnormal
Check the TCX200 (Crack, open etc.)
Check the U501
Crack etc
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8. Level 3 Repair
8-4-3. No Service
Check menu setting
Settings → Mobile networks → Network mode → Is setting auto connect ?
No service
Yes
Home screen → Phone → Keypad
→ *#1234# → check Phone version
→ CP : A310FXXXX or unknown
CP : unknown
Check the voltage level
C517 = 1.2V
C518 = 1.8V
C516 = 1.2V
C515 = 1.8V
Yes
Check TCX200
Frequency = 26MHz
Yes
Replace UCP400
Yes
END
CP : A310FXXXX
No
Check the connection of RF coaxial cable
No
Replace the TCXO200
Replace the U202
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8. Level 3 Repair
8-4-4. Sim Part
Insert SIM card
Change to the new
SIM card. Work
nomal?
Is SIM socket ok?
Check the SIM
Voltage.
(C5001, R523 )
>= 1.8 or 1.8?
Check that SIM
RST/IO/CLK.
(ZD509,ZD507,ZD508)
has signal
END
Yes
No
Yes
Yes
Yes
Yes
END
No
Resoldering SIM socket pad
No
Check the U3000,U303 (Crack etc)
No
Check the UCP400 (Crack etc)
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8. Level 3 Repair
8-4-5. Charging Part
Charging Failure.
Yes
Check the voltage at
VBUS_IF_5P0(C739)=5V
Yes
Check the voltage at
CHG_IN_5P0(C521)=5V
Yes
Battery is charging?
Yes
Change UCP400
Yes
Change PBA
END
No
No
Check the USB connector(Crack etc)
Reconnect ‘Main PBA’ and ‘Sub PBA’
Replace ‘Sub PBA’
Check and replace U500 (crack etc)
No
Change battery
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8. Level 3 Repair
8-4-6. OTG
OTG Failure.
Yes
Check the voltage at
CHG_IN_5P0(C521)=5V
Yes
Check the voltage at
VBUS_IF_5P0(C739)=5V
Yes
Change UCP400
Yes
Change PBA
END
No
Reconnect ‘Main PBA’ and ‘Sub PBA’
Replace ‘Sub PBA’
Check and replace U500 (crack etc)
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8. Level 3 Repair
8-4-7. Proxy Sensor
Sensor does not work
Check the R607 =
1.8V ?
Check the C606 =
3.3V ?
Check R600, R601
(I2C is OK?)
Replace U601
(Proxy sensor)
END
Yes
Yes
Yes
Yes
No
No
No
Resolder or Replace : U600
Resolder or Replace : U501
Resolder or Replace : U400-1
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8. Level 3 Repair
8-4-7-2. Magnetic Sensor
Sensor does not work
Yes
Check the C618 =
1.8V ?
Yes
Check R430, R431
(I2C is OK?)
Yes
Replace U603
(Magnetic sensor)
END
No
Resolder or Replace : U600
No
Resolder or Replace : U400-1
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8. Level 3 Repair
8-4-7-3. Accel Sensor
Sensor does not work
Check the C612 =
1.8V ?
Check R430, R431
(I2C is OK?)
Replace U602
(Accel sensor)
END
Yes
Yes
Yes
No
No
Resolder or Replace : U600
Resolder or Replace : U400-1
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8. Level 3 Repair
8-4-8-1 Microphone Part - Main MIC
in voice call Handset mode or voice recorder mode
Check main microphone function
Yes
Check sub board
connection (HDC703)
Yes
Check MIC100 SMD
status at sub board
Yes
Check component
soldering status of
L109 at sub board
Yes
END
No
No
No
Set the HDC703 connection
Resolder or Replace : MIC100
Resolder or Replace : L109
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8. Level 3 Repair
8-4-8-2. Microphone Part - Sub(2nd) MIC
Check sub(2nd) microphone function
in voice call loudSPK NS Off mode or in
camcording mode
Check sub board
connection (HDC600)
Check component
soldering status of
L601
END
Yes
Yes
Yes
No
No
Set the HDC600 connection
Resolder or Replace : L601
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8. Level 3 Repair
8-4-10. Receiver Part
Check receiver function
in voice call receiver mode.
Check the statuses
ANT607 / ANT609
Check RCV module
for any damage
Check the signals on
L603, L605
END
Yes
Yes
Yes
Yes
No
No
No
Resolder or Replace : ANT607, ANT609
Replace the RCV module
Replace U501
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8. Level 3 Repair
8-4-12. BT/WIFI
BT/WiFi is not working
Check BT or WiFi
function ON
Check the Voltage on
C336 = 1.8V
Check the Status of
L310, C346, F301
L316
Check the Status of
L312, C345, VR300
Check the Status of
ANT300
Resolder or Replace
U304
END
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Enable BT or WiFi Function
Check the U501(crack, open, damaged, etc.)
Resolder or change the
L310, C346, F301
L316
Resolder or change the
L312, C345, VR300
Resolder or Replace ANT300
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Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
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