Samsung SM-A920F User manual

SM-A920F Common
Mobile Device CONTENTS
1. Safety Precautions
2. Specification
3. Product Function
4. Exploded View and Parts list
5. MAIN Electrical Parts List
6. Level 1 Repair
7. Level 2 Repair
8. Level 3 Repair
9. Reference data
Notice: All functionality, features, specifications,
and other product information provided in this
document, including but not limited to, benefits,
design, pricing, components, performance,
availability, and capabiliti-es of the product are
subject to change without notice. Samsung
reserves the right to alter this doc-ument or the
product described herein at anytime, without
obligation to provide notification of such
changes.

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Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
1. Safety Precautions
1-1. Repair Precaution
Before attempting any repair or detailed tuning, shield the device from RF noise or static
electricity discharges.
Use only demagnetized tools that are specifically designed for small electronic repairs,
as most electronic parts are sensitive to electromagnetic forces.
Use only high quality screwdrivers when servicing products. Low quality screwdrivers can
easily damage the heads of screws.
Use only conductor wire of the properly gauge and insulation for low resistance, because of the low margin
of error of most testing equipment.
We recommend 22-gauge twisted copper wire.
Hand-soldering is not recommended, because printed circuit boards (PCBs) can be easily
damaged, even with relatively low heat. Never use a soldering iron with a power rating of
more than 100 watts and use only lead-free solder with a melting point below 250°C (482°F).
Prior to disassembling the battery charger for repair, ensure that the AC power is disconnected.
Always use the replacement parts that are registered in the SEC system. Third-party replacement parts
may not function properly.

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1. Safety Precautions
1-2. ESD(Electrostatically Sensitive Devices) Precaution
Many semiconductors and ESDs in electronic devices are particularly sensitive to static discharge and can
be easily damaged by it. We recommend protecting these components with conductive anti-static bags
when you store or transport them.
Always use an anti-static strap or wristband and remove electrostatic buildup or dissipate
static electricity from your body before repairing ESDs.
Ensure that soldering irons have AC adapter with ground wires and that the ground wires are properly
connected.
Use only desoldering tools with plastic tips to prevent static discharge.
Properly shield the work environment from accidental electrostatic discharge before opening
packages containing ESDs.
The potential for static electricity discharge may be increased in low humidity environments,
such as air-conditioned rooms. Increase the airflow to the working area to decrease the
chance of accidental static electricity discharges.

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2. Specification
2-1. GSM General Specification
Item GSM 850 EGSM 900 DCS1800 PCS1900
Freq. Band[MHz]
Uplink/Downlink
824~849
869~894
880~915
925~960
1710~1785
1805~1880
1850~1910
1930~1990
ARFCN range 128~251 0~124 & 975~1023 512~885 512~810
Tx/Rx spacing 45MHz 45MHz 95MHz 80MHz
Mod. Bit rate/
Bit Period
270.833kbps
3.692us
270.833kbps
3.692us
270.833kbps
3.692us
270.833kbps
3.692us
Time Slot Period/
Frame Period
576.9us
4.615ms
576.9us
4.615ms
576.9us
4.615ms
576.9us
4.615ms
Modulation GSM/
EGPRS
GMSK/
8PSK
GMSK/
8PSK
GMSK/
8PSK
GMSK/
8PSK
MS Power 32.8dBm~5dBm 33dBm~5dBm 29.5dBm~0dBm 29.8dBm~0dBm
Power Class 4(GMSK)
E2(8PSK)
4(GMSK)
E2(8PSK)
1(GMSK)
E2(8PSK)
1(GMSK)
E2(8PSK)
Sensitivity -109.5dBm -109.5dBm -108.5dBm -108dBm
TDMA Mux 8 8 8 8

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2. Specification
2-2. GSM Tx Power Class
TX Power
control level GSM850 TX Power control level EGSM900 TX Power control level DCS1800 TX Power control level PCS1900
5 33±2 dBm 5 33±2 dBm 0 30±3 dBm 0 30±3 dBm
6 31±2 dBm 6 31±2 dBm 1 28±3 dBm 1 28±3 dBm
7 29±2 dBm 7 29±2 dBm 2 26±3 dBm 2 26±3 dBm
8 27±2 dBm 8 27±2 dBm 3 24±3 dBm 3 24±3 dBm
9 25±2 dBm 9 25±2 dBm 4 22±3 dBm 4 22±3 dBm
10 23±2 dBm 10 23±2 dBm 5 20±3 dBm 5 20±3 dBm
11 21±2 dBm 11 21±2 dBm 6 18±3 dBm 6 18±3 dBm
12 19±2 dBm 12 19±2 dBm 7 16±3 dBm 7 16±3 dBm
13 17±2 dBm 13 17±2 dBm 8 14±3 dBm 8 14±3 dBm
14 15±2 dBm 14 15±2 dBm 9 12±4 dBm 9 12±4 dBm
15 13±2 dBm 15 13±2 dBm 10 10±4 dBm 10 10±4 dBm
16 11±3 dBm 16 11±3 dBm 11 8±4 dBm 11 8±4 dBm
17 9±3 dBm 17 9±3 dBm 12 6±4 dBm 12 6±4 dBm
18 7±3 dBm 18 7±3 dBm 13 4±4 dBm 13 4±4 dBm
19 5±3 dBm 19 5±3 dBm 14 2±5 dBm 14 2±5 dBm
- - - - 15 0±5 dBm 15 0±5 dBm

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2. Specification
2-3. WCDMA General Specification
Item WCDMA2100(B1) WCDMA1900(B2) WCDMA1700(B4) WCDMA850(B5) WCDMA900(B8)
Freq. Band[MHz]
Uplink/Downlink
1920~1980
2110~2170
1850~1910
1930~1990
1710~1755
2110~2155
824~849
869~894
880~915
925~960
ARFCN range UL：9612~9888
DL：10562~10838
UL：9262~9538
DL：9662~9938
UL：1312~1513
DL：1537~1738
UL：4132~4233
DL：4357~4458
UL：2712~2868
DL：2937~3088
Tx/Rx spacing 190MHz 80MHz 400MHz 45MHz 45MHz
Mod. Bit rate/
Bit Period
42.2Mbps(DL)
5.42Mbps(UL) 42.2Mbps(DL) 5.42Mbps(UL) 42.2Mbps(DL) 5.42Mbps(UL) 42.2Mbps(DL) 5.42Mbps(UL) 42.2Mbps(DL) 5.42Mbps(UL)
Time Slot Period/
Frame Period
WCDMA
10ms/0.667ms
HSPA
2ms/0.667ms
WCDMA
10ms/0.667ms
HSPA
2ms/0.667ms
WCDMA
10ms/0.667ms
HSPA
2ms/0.667ms
WCDMA
10ms/0.667ms
HSPA
2ms/0.667ms
WCDMA
10ms/0.667ms
HSPA
2ms/0.667ms
Modulation QPSK
16QAM
64QAM
QPSK
16QAM
64QAM
QPSK
16QAM
64QAM
QPSK
16QAM
64QAM
QPSK
16QAM
64QAM
MS Power
(dBm) 23.5 ~ -49(↓) 22.5 ~ -49(↓) 22.5 ~ -49(↓) 23 ~ -49(↓) 22.5 ~ -49(↓)
Power Class 3(max+24dBm) 3(max+24dBm) 3(max+24dBm) 3(max+24dBm) 3(max+24dBm)
Sensitivity -111.0dBm -110dBm -110dBm -111.5dBm -111.5dBm

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2. Specification
2-4. LTE General Specification
Item LTE Band1 LTE Band2 LTE Band3 LTE Band4 LTE Band5
Freq. Band[MHz]
Uplink/Downlink
1920~1980
2110~2170
1850~1910
1930~1990
1710~1785
1805~1880
1710~1755
2110~2155
824~849
869~894
ARFCN range UL:18000~18599
DL:0~599
UL:18600~19199
DL:600~1199
UL:19200~19949
DL:1200~1949
UL:19950~20399
DL:1950~2399
UL:20400~20649
DL:2400~2649
Tx/Rx spacing
(MHz) 190 80 95 400 45
Channel Bandwidth
(MHz) 5/10/15/20 1.4/3/5/10/15/20 1.4/3/5/10/15/20 1.4/3/5/10/15/20 1.4/3/5/10
Modulation QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
MS Power
(dBm) 25.7~-39(↓) 25.7~-39(↓) 25.7~-39(↓) 25.7~-39(↓) 25.7~-39(↓)
Sensitivity
(QPSK, BW 10MHz)
(dBm)
-100 -98.5 -99 -99 -100
Item LTE Band7 LTE Band8 LTE Band12 LTE Band13
Freq. Band[MHz]
Uplink/Downlink
2500~2570
2620~2690
880~915
925~960
699~716
729~746
777~787
746~756
ARFCN range UL:20750~21449
DL:2750~3449
UL:21450-21799
DL:3450-3799
UL:23010~23179
DL:5010~5179
UL:23180~23179
DL:5180~5279
Tx/Rx spacing
(MHz) 120 45 30 -31
Channel Bandwidth
(MHz) 5/10/15/20 1.4/3/5/10 1.4/3/5/10 5/10
Modulation QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
MS Power (dBm) 25.7~-39(↓) 25.7~-39(↓) 25.7~-39(↓) 25.7~-39(↓)
Sensitivity
(QPSK, BW 10MHz)
(dBm)
-99 -100 -99 -99

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Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
2. Specification
Item LTE Band17 LTE Band20 LTE Band26 LTE Band28
Freq. Band[MHz]
Uplink/Downlink
704~716
734~746
832~862
791~821
814~849
859~894
703~748
758~803
ARFCN range UL:23730~23849
DL:5730~5849
UL:24150~24449
DL:6150~6449
UL:26690~27039
DL:8690~9039
UL:27210~27659
DL:9210~9659
Tx/Rx spacing
(MHz) 30 -41 45 55
Channel Bandwidth
(MHz) 5/10 5/10/15/20 1.4/3/5/10/15 3/5/10/15/20
Modulation QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
MS Power
(dBm) 25.7~-39(↓) 25.7~-39(↓) 25.7~-39(↓) 25.7~-39(↓)
Sensitivity
(QPSK, BW 10MHz)
(dBm))
-99 -100 -99 -98.5
Item LTE Band38 LTE Band40 LTE Band41 LTE Band66
Freq. Band[MHz]
Uplink/Downlink 2570~2620 2300~2400 2496~2690 1710~1780
2111~2200
ARFCN range UL/DL:37750 ~ 38249 UL/DL:38650 ~ 39649 UL/DL:39650 ~ 41589 UL: 131972~132671
DL: 66436~67335
Tx/Rx spacing
(MHz) 0 0 0 400
Channel Bandwidth
(MHz) 5/10/15/20 5/10/15/20 5/10/15/20 1.4/3/5/10/15/20
Modulation QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
MS Power
(dBm) 25.7~-39(↓) 25.7~-39(↓) 25.7~-39(↓) 25.7~-39(↓)
Sensitivity
(QPSK, BW 10MHz)
(dBm)
-98 -98 -98 -98

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Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
3. Product Function
Main Function
Item Description
OS Android V8.0
RF
GSM850 / GSM900 / DCS1800 / PCS1900
WCDMA: B1/ B2/ B4/ B5/ B8
LTE: B1/ B2/ B3/ B4/ B5/ B7/ B8/ B12/ B13/ B17/ B20/ B26/ B28/ B38/ B40/ B41/ B66
Battery 3720mAh
Base Band 2.2Ghz Quad + 1.8GHz Quad
Other RF A-GPS, Glonass, BEIDOU, Galileo, BT5.0, USB 2.0 Type-C, WIFI 802.11 a/b/g/n/ac MIMO,NFC,
Camera QUAD Camera
(24MP F1.7+5M F2.2+10M F2.4+8MP F2.4) with LED Flash, 24MP F2.0 (Front)
LCD 6.3", Super AMOLED FHD+, 2220x1080
RAM 6GB
Sensor Accelerometer, Fingerprint Sensor, Gyro Sensor, Geomagnetic Sensor, Proximity Sensor, RGB Light
Sensor
Accessory
Charger: 5V/2A (AFC: 9V/1.67A)
Data cable: 3.2pi, 0.8m(Type C/ USB-A)
Ear phone: 3.5pi, 4pin

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4. Exploded View and Parts List
4-1. Cellular phone Exploded View
QRE01
QKP01
QCR205
QFR01
QMO01
QME04
QAR01
QCA01
QMP01
QCR12
QCA02
QCB02
QCK02
QSM01
QVO02
QBC01
QSP01
QVO01
QCK01
QCR12
QME05
QCR12
QME01
QCB01
QME02
QBA01
QME03
※SVC REPAIR TAPE
QRT01, QRT02