TCL Alcatel Pixi4-4.5 TF Technisches Handbuch
L2 Repair Document TCLCommunication Ltd.
Rev.
A570BL & A571VL Level 2 Repair Document
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Pixi4-4.5 TF
A570BL & A571VL
Note: this manual is non-contractual and TCL Communication Ltd. can modify it without prior
notice on the characteristics of described equipments.
L2 Repair Document TCLCommunication Ltd.
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1.0 2016-02-16 Draft creation Peter Ye Abby Zhou Shawn Xiao
Rev. Date Modification description Prepared By Checked By Approved By
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Content
1Level 2 repair process ..............................................................................................4
2Warranty Check and Visual Inspection ...................................................................5
2.1Warranty confirmation of L1.....................................................................................5
2.2Visual mechanical check..........................................................................................6
2.3Pretest........................................................................................................................7
5Disassembly and assembly A570BL/A571VL .......................................................14
5.1ESD Safety...............................................................................................................14
5.2Disassembly tool.....................................................................................................14
5.3Disassembly process..............................................................................................15
5.4Reassembly Process ..............................................................................................22
5.5Disassembly process evaluation...........................................................................23
6Disassembly Complete...........................................................................................24
7Level 2 repair...........................................................................................................25
8Other component exchange...................................................................................33
9Final test ..................................................................................................................34
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1 Level 2 repair process
Reassembly
Record in BIG
End
OK
Retest
OK
OK
Start
Visual Inspection
Warranty Check
Pretest & Failure confirm
SW Upgrade
Disassembly
L2 Repair
Retest
Function test
NG
NG
Restore User Information
Back up user data
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2 Warranty Check and Visual Inspection
2.1 Warranty confirmation of L1
1) IMEI sticker check:
a) Power on the handset, enter *#06#
b) If the IMEI sticker in the back casing is not lost:
We should make sure that the IMEI number must be the same with the one on the IMEI sticker; if
not, it’s out of warranty policy
2) Humidity sensitive label
If humidity sensitive label is not good, the cell phone will be considered as out of guarantee.
a) Liquid was detection by humidity sensitive label
b) Position of humidity sensitive sticker.
Humidity sensitive sticker is on the bottom of the front casing.
Here is the
humidity sensitive
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2.2 Visual mechanical check
Mechanical warranties check items:
1) Corrosion
Corrosion on the USB connector, SIM connector, and other metal surfaces。
2) Hole (diameter > 1mm)
Holes on any surface, including the front casing, furnished frame, battery cover, touch Lens,
keypad…
3) Bump
Bumps (diameter > 1mm) on any surface, including front casing, decorate frame, battery
cover, touch Lens, keypad, etc.
4) Scratch
Scratches (length > 3mm) on any surface, including the front casing, decorate frame, battery
cover, touch Lens, keypad, etc.
5) Distortion
Bend, twisted or crushed on the h/s, cover/casing or connectors, etc.
6) Broken
Touch broken, casing/cover broken, etc.
7) Dropped
Keypad tear off, touch lens, connectors dropped, etc.
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8) Gap
External physical damage relating to abnormal use, like front case and frame opened
9) Others
Damage caused by disassembly ,wrong part assembly, loss of components
Use in abnormal environment like high temperature causing plastic melts
2.3 Pretest
1) Check that the SIM card is set correctly.
2) Power on the cell phone.
3) If the cell phone asks to input NCK code, this means it is SIM locked and can only be worked
with dedicated SIM card. Use the correct SIM card.
4) Enter the phone code if necessary.
5) After the phone power on, test step by step with the auto test code:
Press *#2886# in dial screen and then you will see the interface displaying the SW version. Select
“Auto” to start the auto test, or select “MANU” to do the MMI test manually.
If one of the tests failed during “Auto” test mode, it will show “Text[X] xxx failed. Restart?”, press “YES”
to retest, press “Next” to go on next test and press ”NO” to finish test.
TRACABILITY
I. You can get some information such as IMEI, CU-REF, PTM, Date Code, etc.
II. Press “Pass” to continue.
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Check Tunning
I. It will check the test automatically, and it will show “Pass” if it functions well;
II. Press “PASS” to continue.
TP RAW DATA
I. It will check the test automatically, and it will show “Pass” if it functions well;
II. Press “Pass” to continue.
Touch panel
I. Please draw on the yellow area and it will show “TEST RESULT OK!”;
II. Press “Pass” to continue;
Display
I. You will see the LCD display three colors: RED, GREEN and BLUE if it
functions well;
II. Press “Pass” to continue;
LCD BLACK
I. You will see the LCD displays black if it functions well;
II. Press “Pass” to continue;
LCD GRAYCHART
I. You will see the LCD displays grey if it functions well;
II. Press “Pass” to continue;
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LCD GRAYLEVEL
I. You will see the LCD displays grey level if it functions well;
II. Press “Pass” to continue;
LCD WHITE
I. You will see the LCD displays white if it functions well;
II. Press “Pass” to continue.
KEYBOARD
I. Press the key displayed on the screen. The key on the screen will turn grey
when you press it if it functions well;
II. Press “Pass” to continue.
LCD BACKLIGHT
I. The screen backlight will be flashing if it functions well;
II. Press “Pass” to continue.
Front CAMERA
Press “Pass” to continue if the main camera functions well.
MAIN CAMERA
Press “Pass” to continue if the front camera functions well.
CAMERA LED
I. Camera LED will turn on if it functions well;
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II. Press “Pass” to continue.
AUDIO
I. You will hear a voice prompt which introduces some emergency call numbers
from the receiver if it functions well;
II. Press “PASS” to continue;
III.You will hear a voice prompt which introduces some emergency call numbers
from the speaker if it functions well;
IV. Press “Pass” to continue;
V. Make a noise near the MIC, you will hear it from the receiver if it functions well;
VI. Press “Pass” to continue;
VIBRATOR
I. You can feel the phone’s vibrating if it functions well;
II. Press “Pass” to continue.
ACCESSORY
I. Insert headset according to the instruction and you will hear a voice prompt
which introduces some emergency call numbers through the headset left if it
functions well;
II. Press “Pass” to continue;
III.You will hear a voice prompt which introduces some emergency call numbers
through the headset right if it functions well;
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