Samsung SM-A405FN service manual PSPEC
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 err or 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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Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
1. Safety Precautions
1-2. ESD(Electrostaticall y 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-stat i c 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.
Confidential and pr oprietary-the c ontents in this ser vice guide subject to change wi thout prior noti ce
Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
2. 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
33dBm~5dBm
33dBm~5dBm
30dBm~0dBm
30dBm~0dBm
Power Class
4(GMSK)
E2(8PSK)
4(GMSK)
E2(8PSK)
1(GMSK)
E2(8PSK)
1(GMSK)
E2(8PSK)
Sensitivity
-102dBm
-102dBm
-100dBm
-100dBm
TDMA Mux
8 8 8
8
2-1. GSM General Specification
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2. Specification
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
2-2. GSM Tx Power Class
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Confidential and proprietary-the contents in this service guide subject to change without prior notice
2. Specification
Item
WCDMA2100(B1)
WCDMA1900(B2)
WCDMA850(B5)
WCDMA900(B8)
Freq. Band[MHz]
Uplink/Downlink
1920~1980
2110~2170
1850~1910
1930~1990
824~849
869~894
880~915
925~960
ARFCN range
UL：9612~9888
DL：10562~10838
UL：9262~9538
DL：9662~9938
UL：4132~4233
DL：4357~4458
UL：2712~2868
DL：2937~3088
Tx/Rx spacing
190MHz
80MHz
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)
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
Modulation
QPSK
16QAM
64QAM
QPSK
16QAM
64QAM
QPSK
16QAM
64QAM
QPSK
16QAM
64QAM
MS Power
(dBm)
25.7 ~ -49(↓)
25.7 ~ -49(↓)
25.7 ~ -49(↓)
25.7 ~ -49(↓)
Power Class
3(max+24dBm)
3(max+24dBm)
3(max+24dBm)
3(max+24dBm)
Sensitivity
-106dBm
-104dBm
-104dBm
-103dBm
2-3. WCDMA General Specification [SM-A405FN/FM]
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2. Specification
Item
LTE Band1
LTE Band3
LTE Band5
LTE Band7
LTE Band8
Freq. Band[MHz]
Uplink/Downlink
1920~1980
2110~2170
1710~1785
1805~1880
824~849
869~894
2500~2570
2620~2690
880~915
925~960
ARFCN range
UL:18000~18599
DL:0~599
UL:19200~19949
DL:1200~1949
UL:20400~20649
DL:2400~2649
UL:20750~21449
DL:2750~3449
UL:21450-21799
DL:3450-3799
Tx/Rx spacing
(MHz)
190
95
45
120
45
Channel Bandwidth
(MHz)
5/10/15/20
1.4/3/5/10/15/20
1.4/3/5/10
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)
-96.3
-93.3
-94.3
-94.3
-93.3
Item
LTE Band20
LTE Band38
LTE Band40
LTE Band41
Freq. Band[MHz]
Uplink/Downlink
832~862
791~821
2570~2620
2300~2400
2496~2690
ARFCN range
UL:24150~24449
DL:6150~6449
UL/DL:37750 ~ 38249
UL/DL:38650 ~ 39649
UL/DL:39650 ~ 41589
Tx/Rx spacing (MHz)
-41 0 0
0
Channel Bandwidth
(MHz)
5/10/15/20
5/10/15/20
5/10/15/20
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)
-93.3
-96.3
-96.3
-94.3
2-4. LTE General Specification
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Confidential and proprietary-the contents in this service guide subject to change without prior notice
3. Product Function
Item
Description
OS
Android P OS V9.0
RF
GSM850 / GSM900 / DCS1800 / PCS1900
WCDMA: B1/ B2/ B5/ B8
LTE: (FDD) B1/ B3/ B5/ B7/ B8/ B20
(TDD) B38/ B40/ B41
Battery
3,1000 mAh
Base Band
Octa core (1.8GHz / 1.6Ghz)
Other RF
GPS, Glonass, Beidou, Galileo, BT5.0, USB 2.0, WIFI 802.11 a/b/g/n/ac 2.4G+5GHz,
FM Radio, NFC, MST
(SM-A405FM/DS only supports MST,
SM-A405FN/DS doesn’t support MST)
Camera
Rear : 16.0MP+ 5MP, Front : 25.0MP
LCD
5.9” On-Cell Touch AMOLED, 2340 x 1080 (FHD+)
RAM
4GB
Storage
64GB
Sensor
Accelerometer, Fingerprint Sensor, Gyro Sensor, Gemagnetic Sensor
Hall Sensor, Light Sensor, Proximity Sensor
Accessory
Charger: 9V/1.67A and 5V/2.0A AFC charging
Data cable: 3.0pi, 0.8m(USB-C)
Ear phone: 3.5pi, 4pin
Main Function
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6. Level 1 Repair
Data Cable : GH39-01999A
6-1. S/W Update
6-1-1. Preparation
S/W Update program : Fenrir 5.17.xxxx
Mobile Phone
Data Cable
※ Settings
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6. Level 1 Repair
6-1-2. How to use ‘Fenrir’ S/W update program.
1) Launch Fenrir by clicking on the icon on the desktop
- SVH (Fenrir_Home) : It uses Home binary which does not have user data area in the memory when
flashed to a device. (Keep user data)
- SVC (Fenrir_Factory) : It uses Factory binary which erases all user data in the memory when flashed to a
device. (Clear user data)
- SVA (Fenrir_All) : It uses Factory and Home binaries. you can download Home and Factory binary in a
PC(but requires double HDD storage and NW traffic)
2) Input ID & password
※You need to reset the ID information in case of PC change and format and repair, hard disk change
Confidential and proprietary-the contents in this service guide subject to change without prior notice
Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
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