Samsung SM-A720F User manual

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7. Level 2 Repair
7-1. Components on the Rear Case

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7. Level 2 Repair
7-2. Pre-requisite
Tweezers / Disass'y Stick / Screw Driver Anti-static Gloves
Anti-static Mat
Hot Plate
A OCTA Disassembly Holder
OCTA Disassembly Upper
Ethyl Alcohol Cotton Swab

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7. Level 2 Repair
7-3. Parts which must be changed after repair
BOM A code Image Remarks
A/S Back Glass Outside Tape
(Common)
[GH81-14368A]
Replace for
Back Glass repair
A/S Back Glass Inner Tape
[GH81-14367A]

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Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
7. Level 2 Repair
7-4. Disassembly
※C a u tio n
1) Be care of scratch ※C a u tio n 1) Be care of scratch
※C a u tio n
1) Be care of Rear damage ※C a u tio n 1) Be care of Rear and connector damage
1 2 Unscrew 15 Point and disassemble SIM Tray1,
2 from device.
3 Disassemble Upper/Middle Rear.(Use disassemble
hole left side of Rear to detach it) 4 Finally Disassemble Rear of bottom side.
(Use disassemble hole left side of Rear to detach it)
1) SOC 68%

: Put the device in the chamber
for 10~20 minutes under 70℃.
2) SOC 68% : Put the device in the chamber for
10~20 minutes under 60℃.
3) Detach the Back Glass.

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7. Level 2 Repair
※C a u tio n
1) Be careful not to damage the PBA ※C a u tio n 1) Be care of connector/cable damage
※C a u tio n
1) Be care of PBA damage ※C a u ti o n 1) Be care of several kinds of damage
6 Detach Battery connect and the other
connectors. (7 Points, except for Front Camera
connector)
7 Detach main PBA from Front. 8 Detach other components.
Unscrew PBA 3 points.
5
MAIN Camera
SUB Camera
Battery
Motor
Ear Jack
Prox Sensor
Receiver
Detach PBA

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7. Level 2 Repair
7-5. Assembly
※
Caution
1) Be care of FPCB damage and tilt
2) Be care of press power/time
※Caution
1) Be care of chip damage nearby screw point
※Caution
1) Be care of Battery damage.
※Caution
1) Be care not to damage the PBA.
1
Attach components on Front.
(RCV module, Sensor FPCB, Motor) and then
Press RCV.
2 Attach PBA assy In Front Assy.
(PBA+ Front)
3 Attach Battery connect and the other
connectors. (7 Points)
Attach Front Camera on PBA.
4 Screw PBA 3 points.
(Torque:1.2 Kgf·cm±7%)
MAIN
SUB
Motor
Ear
Prox
Receive
PCB 15°angle

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7. Level 2 Repair
※Caution
1) Be care of scratch and REAR damage ※Caution 1) Be care of scratch and REAR damage
※Caution
1) Be care of scratch and REAR damage
※Caution
1) Be care of scratch and tilt.
5 6
7 Screw 15 Point andAssemble SIM Tray1, 2 on
device
(Torque:1.3 Kgf·cm±7%)
8 Attach Back Glass.
Assemble Rear of bottom side.
Assemble Upper/Middle Rear.

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Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
7. Level 2 Repair
※Caution
1) Be care of scratch. ※Caution 1) Be care of scratch.
※Caution
1) Be care of scratch.
※Caution
1) Be care of PBA damage
9 Press Back Glass.(1N for 1minute) 10 Do water resistance test(WRT)
11 If fail WRT doing debugging(sealing or etc) 12 If IF connector problem, disassemble
& remove gasket

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Distribution, transmission, or infringement of any content or data from this document without Samsung’s written authorization is strictly prohibited.
7. Level 2 Repair
※Caution
1) Be care of scratch. ※Caution 1) Be careful not to damage the PBA
13 Use O-ring(GH81-14271A) on IF CON
Reassemble & Re WRT
※Remove USB Dispensing on PBA.
Insert O-Ring on PBA.