TCL Alcatel Pixi4-3.5 3G Technical manual

L2E Repair Document TCLCommunication Ltd.
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Pixi4-3.5 3G
4017A_D_E_F_X_S
Note: this manual is non-contractual and TCL Communication Ltd. can modify it without prior
notice on the characteristics of described equipments.

L2E Repair Document TCLCommunication Ltd.
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1.0
2016-2-27
Official version
Peter ye
Rev.
Date
Modification description
Prepared By
Checked By
Approved By

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Content
1Level 2 enhance repair process...............................................................................4
2Warranty Check and Visual Inspection ...................................................................5
2.1 Warranty confirmation of L1.....................................................................................5
2.2 Visual mechanical check ..........................................................................................6
2.3 Pretest........................................................................................................................7
2.5 Accessories inspection ............................................................................................8
2.6 Cell phone maintenance procedure ........................................................................9
3Software download .................................................................................................15
3.1 Equipments requested when download：............................................................16
3.2 Install driver.............................................................................................................16
3.3 SW download process............................................................................................17
5Disassembly and assembly 4017...........................................................................21
5.1 ESD Safety ...............................................................................................................21
5.2 Disassembly tool.....................................................................................................21
5.3 Disassembly process .............................................................................................22
5.4 Reassembly Process ..............................................................................................29
5.5 Disassembly process evaluation...........................................................................30
6Disassembly Complete...........................................................................................31
7Level 2 repair ...........................................................................................................33
8L2 Enhance repair ...................................................................................................41
8.1 Position of L2 enhance components on main PCBA...........................................41
8.2 Trouble shooting for common failures..................................................................43
8.3 L2 enhance spare part list ......................................................................................52
9PCBA exchange.......................................................................................................52
10 Other component exchange...................................................................................53
11 Final test ..................................................................................................................54

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1 Level 2 enhance repair process
Reassembly
Record in BIG
End
OK
Rete
st
OK
OK
Star
Visual Inspection
Warranty Check
Pretest & Failure confirm
SW Upgrade
Disassembly
L2 Repair
Rete
st
Function
test
PCBA Replace
NG
NG
NG
Restore User Information
Back up user data
L2E Repair
Rete
st
OK
NG

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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
sticker.

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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.
1) Corrosion
Corrosion on the USB connectors, SIM connectors, and other metal surfaces
2) Hole

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Holes (Diameter > 1mm) on any surface, including front casing, decorate frame, battery
cover, LCD Lens, keypad.
3) Bump
Bumps (Diameter>1mm) on any surface, including the front casing, decorate frame,
battery cover, LCD Lens, keypad
4) Scratch (length > 3mm)
Scratches on any surface, including the front casing, furnished frame, battery cover,
LCD Lens, keypad
5) Distortion
Bend, twisted or crushed on the h/s, cover/casing or connectors
6) Broken
LCD broken, casing broken, cover broken
7) Dropped.
Keypad tear off, LCD lens, connectors fallen off
8) Gap:
External physical damage relating to abnormal use, like front case and frame opened
9) Others:
Damage caused by disassembly like wrong part assembly, lost of components
Use in abnormal environment like too high temperature with plastic melts
2.5 Accessories inspection
Accessories warranties check items:
6) Any use in abnormal temperature, other than the one specified in the user manual. Any
evidence of plastic/casing melted.
7) Any mark of food or liquid around the accessory or in the USB socket.

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8) Any evidence of mechanical shocked which damage the enclosure of the battery, charger
or headset.
9) Any mark of tentative of disassembly the accessory
10) Any abnormal use which induce wire damage, wire broken or USB socket deformed.
2.6 Cell phone maintenance procedure
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, which 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) If 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.

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II. Press “Pass” to continue.
TP0
I. It will running the test automatically, don’t touch TP during test and it will show
“Pass”if it functions well;
II. Press “PASS”to continue.
TP1
I. Please draw on the yellow area and it will show “TEST RESULT OK!”;
II. Press “Pass” to continue.
TP2
I. Please draw on the yellow area and it will show “TEST RESULT OK!”;
II. Press “Pass” to continue;
LCD MIRERGB
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 GREYCHART