
1-1. Repair Precaution
● Before attempting any repair or detailed tuning, shield the device from RF noise or static
electricity discharges.
(Use only antistatic glove and strape.)
● Do not touch metallic parts or circuits with your bare hands as device(parts, circuits, etc) may be
corroded.
● 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.
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.

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.
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.

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.
2-1. GSM General Specification
Freq. Band[MHz]
Uplink/Downlink
Mod. Bit rate/
Bit Period
Time Slot Period/
Frame Period
Sensitivity (QPSK, BW
10MHz) (dBm)

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.

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.
2-3. WCDMA General Specification
Freq. Band[MHz]
Uplink/Downlink
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
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
25.7 ~ -49(↓)
Power Class
Sensitivity (QPSK,
BW 10MHz) (dBm)

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.
2-4. LTE General Specification
Freq. Band[MHz]
Uplink/Downlink
UL:18600~19199
DL:600~1199
UL:19200~19949
DL:1200~1949
UL:19950~20399
DL:1950~2399
UL:20400~20649
DL:2400~2649
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)
Sensitivity (QPSK,
BW 10MHz) (dBm)
LTE Ban d 1 3
[On l y f or A525M ]
Freq. Band[MHz]
Uplink/Downlink
UL:20750~21449
DL:2750~3449
UL:21450-21799
DL:3450-3799
UL:23010~23179
DL:5010~5179
UL:23180~23279
DL:5180~5279
UL:23730~23849
DL:5730~5849
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)
Sensitivity (QPSK,
BW 10MHz) (dBm)

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.
LTE Ban d 32
[On l y f or A525F]
Freq. Band[MHz]
Uplink/Downlink
UL:24150~24449
DL:6150~6449
UL:26690~27039
DL:8690~9039
UL:27210~27659
DL:9210~9659
QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
Sensitivity (QPSK, BW
10MHz) (dBm)
Freq. Band[MHz]
Uplink/Downlink
UL:131972~132671
DL:66436~67335
QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
QPSK,16/64QAM
256QAM(DL only)
PC 2:28.7~- 39(↓)
PC 3:25.7 ~ -39(↓)
Sensitivity (QPSK, BW
10MHz) (dBm)