Nokia 6 Cellphone - PennEngineering · Nokia 6 Cellphone Teardown Step 2: Removing the display...

© 2017 www.pemnet.com 1 1

Nokia 6 Cellphone

April 7th, 2017

Xiaoming Chen

PennEngineering®

http://www.pemnet.com/

© 2017 www.pemnet.com 2

Overview

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Nokia 6 has a 5.5-inch FHD IPS display with a polarizer film covered with

2.5D Gorilla Glass for protection. The smartphone comes in a black 6000

series aluminum uni-body chassis with flat edges that are milled using a

CNC machine from a single brick of aluminum alloy.



Details & Findings

Pictures and Description of the

Nokia 6 and the Disassembly

Process.

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© 2017 www.pemnet.com

Nokia 6 Cellphone Teardown

Step 1: Power off the cellphone and take out the SIM card tray

Get the card tray out of the phone with an E-Ject pin equipped with.

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Nokia 6 Cellphone Teardown Step 2: Removing the display panel assembly

By using a heat gun/hairdryer soften the glue for removing display panel assembly from aluminum alloy phone

case beneath the panel assembly before the separation starts. Then using the suction cup hold the panel and

open a rip with a plug tool. After that, plug in the rip and move the panel up and down until the device is completely

open.

The panel assembly and the phone case is still connected to each other by a flex cable.

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Nokia 6 Cellphone Teardown Step 2: Removing the display panel assembly

The cable fastened by one flat head M1x1.74 screw (circled in Blue) passes through a hole in the metal-spring-

contact first and last, and then screws up into the threads inside of the SMT nut illustrated on the slides #15 , #18 ,

#22 welded on the top circuit board.

The display panel is free to be removed when the cable is disconnected.

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The screw details are as below

• M1 x 1.74 mm overall length

• 2.35 mm head diameter

• 0.33 mm head thickness

• Nylon locking patch

• #00 Phillips drive

• Flat head

• Carbon Steel + Bright Nickel



Nokia 6 Cellphone Teardown Step 3: Removing Home button flex cable

Disconnect the Home button flex cable before removing the M1.2 x 2.77 screw (circled in Blue) from the

aluminum alloy phone case. The screw goes through a hole in the metal-spring-contact and then fastens the flex

cable by the external threads engaging in the threads inside the molded-in nuts illustrated on the slides #11, #13 and

#22 molded into the aluminum alloy phone case beneath the middle casting part.


• M1.2 x 2.77 mm overall length





• Flat head


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Nokia 6 Cellphone Teardown Step 4: Removing the middle aluminum casting plate

Middle aluminum casting plate is held down by 18 screws. All of the screws go through a hole in the middle

aluminum casting plate and then screw up into the threads inside the molded-in nuts illustrated on the slides #11,

#13 and #22 molded into the aluminum alloy phone case beneath the middle casting part. The screws can be

broadly categorized into two basic types, one long screw (circled in Pink) and seventeen short screws.

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metal-spring-contact







• Flat head








• Flat head





Step 4: Removing the middle aluminum casting plate

The middle aluminum casting plate is free to go when the flex cable is disconnected.

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Flex Cable



Nokia 6 Cellphone Teardown Step 5: Removing the top circuit boards from the aluminum alloy phone case

Disconnect the flex cable and signal cable before removing the circuit boards out of the phone case. Release four

M1.2 screws (circled in Blue) and two M1 screws (circled in Green) that hold the top circuit board by the threads

held inside the molded-in nuts illustrated on the slides #11, #13 and #22 , passing through the holes in the metal-

spring-contact and then fastened screwed the threads inside of the SMT nut illustrated on the slides #15 , #18 , #22

welded on the top circuit board, separately.






• Machined


• Flat head


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• Machined


• Flat head





With the top circuit board removed there are twenty molded-in nuts (circled in Pink) for fastening the top circuit

board and flex cables with the external threads pass through a hole in the middle aluminum casting plate and the

metal-spring-contacts and then engage in the threads that are machined inside of the molded-in nuts illustrated on

the print below and slide #13 and #22 .

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Disconnect the signal cable before removing the bottom circuit boards from the phone case. Release one

M1.2 screws (circled in Green) and three M1 screws (circled in Blue) that fastens the bottom circuit board by the

threads inside of the molding-in nuts illustrated on the slides #11, #13 and #22 molded into the aluminum alloy

phone case beneath the middle casting part.






• Machined


• Flat head


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• Machined


• Flat head





Step 6: Removing the top circuit boards from the aluminum alloy phone case

With the bottom circuit board removed there are four molded-in nuts (circled in Pink) appeared for fastening

the bottom circuit board by the external threads go through a hole in the circuit board and then engage in the

threads that are machined inside the molded-in nuts illustrated on the print below and slide #11 and #22 .

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Nokia 6 Cellphone Teardown Step 7: Removing the signal wire

Three M1.2 screws (circled in Pink) hold the wire through the external threads that go through the hole in the

sheet metal parts and then engage with the threads that are machined inside the molding-in nuts illustrated on the

slides #11, #13 and #22 molded into the aluminum alloy phone case beneath the middle casting part.

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• Machined


• Flat head





Step 8: Removing flex cable from bottom circuit board

The flex cable is secured to the bottom circuit board by one M1 screw fastening into the threads inside

the SMT nut illustrated on the slide below and slide #18 , #22 welded on the bottom circuit board.

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• Machined


• Flat head





Step 9: Removing front camera, rear camera, loudspeaker and battery from the aluminum alloy phone case.

The cameras are easy to take out as they are fitted with the flex cables. The loudspeaker can easily be

detached without even using a screwdriver. The battery is fastened with double-sided adhesive tapes.

In this step, no mechanical fasteners were found.

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Other findings

At the bottom of the middle aluminum casting plate there are two brass molded-in bushings for holding

the bottom circuit board together with the aluminum alloy phone case beneath the middle casting part.

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Other findings

On the top circuit board there are three SMT M1 nut for securing the flex cables with screws through

holes in the metal-spring-contacts. The M1 SMT nut is illustrated in the picture below and slide #15 , #22.

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The picture below contains all the components from the NOKIA 6

disassembly:



Fastener Summary



Fasteners Summary / Screws

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Many fasteners used in this device add extra rigidity to the phone and make it easier to take apart. All of the fasteners in this phone are listed in the following table:

Item Thread Overall Length Head Dia. Head Thick. Driver Plating Nylock Qty. Slide No

1 M1.0 Screw 1.74 2.35 0.33 Phillips #00 Bright Nickel Yes 2 #6








9 M1.2 Screw 2 2.27 0.49 Phillips #00 Bright Nickel Yes 3 #12


11 M1.0 SMT Micro Nut 1.15 / / / Tin-Plated / 4 #15,#18,

#22

12 M1.2 Micro Molded-in Nut 0.92 / / / Bright Nickel / 27 #13,#22

13 M1.0 Micro Molded-in Nut 0.92 / / / Bright Nickel / 4 #13,#22

14 φ2.9/φ1.4 X 1.0 Brass Bush 1 / / / / / 2 #17, #22



Fasteners Summary / Screws

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All the fasteners that were found in this device can be categorized in 4 different groups:

• M1 & M1.2



• Flat head


• Quantity: 35

• Reference slide #6, #7 , #8

#10 , #12 , #14 , #15

• 1.0 mm overall length

• O.D. : 2.9 mm

• I.D. : 1.4 mm

• Thread class: None

• Quantity: 2

• Reference slide #17

• M1 & M1.2

• Thread class: 6H

• Quantity: 31

• Reference slide #13

• 1.15 mm overall length

• O.D. : 2.4 mm

• Thread class: M1

• Quantity: 4

• Reference slide #15 , #18



Alternate Solutions

PennEngineering® recommendations of alternative hardware and cost savings

opportunities.

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Section Heading Slide – Do Not Remove



Alternate Solutions


PennEngineering® is fully capable of making all of the fasteners shown on slides

#4 - #17. In addition to direct replacement and perhaps some manufacturing and

material substitution for functional and cost improvement, some alternate

fastening suggestions are presented for specific cases on the following slides.



Alternate Solutions


• Micro screws alternate solution:

PennEngineering® can provide all off these screws with different design solutions. PEM has

license with TORX ®, TORX PLUS®, MICROSTIX® driver and self-tapping thread patent as

like TAPTITE, FASTITE, REMFORM and REMFORM F.



Alternate Solutions


• PEM TackSert parts:

The screws that are used to hold the PC board, earphone jack and power charge on the main

body of the device, can be replaced by TackSert® pins. The TackSert® pins are a permanent

solution but the press-in installation is significantly quicker than the typical screw assembly.



Alternate Solutions


• Φ2.9/Φ1.4 X 1.0 brass bush alternate solution: MicroPEM® thru-threaded brass inserts for plastics introduce ideal fastener solutions to attach

components in compact electronic assemblies. The brass bush can be replaced by MSIB series

microPEM® inserts without hole threaded. PennEngineering® can provide different sizes and types of

MSIA to meet the application requirement. The new MSIA series offer light weight, lead-free

alternative.



Alternate Solutions


• M1 & M1.2 molded-in nut alternate solution: The molded-in nuts can be replaced by MSO4 microPEM® self-clinching standoffs.

PennEngineering® can provide the MSO4 standoffs in different sizes and types to meet the

application requirement.



Alternate Solutions


• M1 SMT Micro Nut alternate solution: The M1 SMT micro nut can be replaced by SMTSO microPEM® surface mount fasteners.

PennEngineering® can provide the SMTSOs with different sizes and types to meet the

application requirement.



We found several components in the device for fastening purposes. The middle aluminum casting

plate underneath the display panel assembly is held by 19 screws, covers and gives the phone extra rigidity. The

top circuit board and bottom circuit board are kept in place with the use of screws. There’s plenty of room for the

battery in the phone case. The battery is attached with double-sided adhesive tape. The front camera and rear

camera are easy to remove as they are connected with flex cables. The loudspeaker can be easily removed

without the use of a screwdriver. Despite all the fasteners, the Nokia 6 actually proved quite easy to take apart.

PennEngineering® can produce all of the fatseners used in the phone within our current manufacturing facilities.

PEM® Type MSO4™ microPEM® standoffs enable components to be mounted and/or spaced in compact

electronic assemblies, especially suiting applications where space may be extremely limited for attachment

hardware.

Type MSIB™ microPEM® brass inserts from PennEngineering® provide reusable metal threads to attach plastics

securely in compact electronic assemblies. The inserts install permanently where designed into ABS,

polycarbonate, and other plastic substrates by pressing them into the host material using ultrasonic equipment or

thermal press. The new MSIA series of Aluminum alloy with different sizes and types offer light weight, lead-free

alternative.

With PEM® micro-SMTSO you can benefit from all the advantages of SMT technology even with the smallest

components. Made of tin-plated steel, SMTSO can be soldered together with other components using the reflow

process. The miniature nuts are available in thread sizes M1 to M1.6 and in lengths from 1 to 3 mm.

As an alternative approach, all of the micro screws can be replaced by PennEngineering® manufactured micro

screws. PEM has license with Microstix®, Torx® and Torx Plus® driver and self-tapping thread patent such as

TAPTITE®, FASTITE®, REMFORM® and REMFORM F® with different design solutions.

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Conclusions and Summary


Nokia 6 Cellphone - PennEngineering · Nokia 6 Cellphone Teardown Step 2: Removing the display...

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