Fairphone 4 Manual de usuario
Repairability and recyclers information on
Fairphone 4
Product Identification 3
Electronic board, wiring and connection diagrams 4
List of repair and test equipment needed 5
Technical manual 6
Diagnostic fault and error codes 7
Component and diagnosis information 8
Instructions for software updates. 9
Data records of reported failure incidents 10
Technical bulletins 10
Guidance for self-repair and technical manual. 11
Spare Parts Overview and disassembly map 11
Disassembly Flow 12
Cautions Before Disassembly 12
Check for water ingress 13
Replacing Back Cover (NFC Antenna) and Battery 14
Replacing Display 14
Replacing Rear Cameras, Selfie Camera or Earpiece 15
Replacing Loudspeaker, Vibration Motor or USB-C Port 16
Replacing PCB and Mid-frame 17
Aditional resources 17
Material information for recyclers 17
1. Product Identification
This document refers to Fairphone 4 5G a product by Fairphone, that was launched in
the market on the 25th of October 2021.
This device comes in different configurations:
Grey
6 GB RAM, 128 GB Internal Memory
579 EUR RRP
Grey, Green and Green speckled
8 GB RAM, 256 GB Internal Memory
649 EUR RRP
The main technical specifications are as follows:
5G European operator ready
Dual SIM (NanoSIM and eSIM)
Cameras
48MP wide OIS with laser AF
48MP ultra-wide / macro
Color sensor & 1D TOF sensor (low-light assist)
25MP FF (Selfie)
Qualcomm 750G (7225) Chipset
3905 mAh Battery (50% charge in 30min)
Qualcomm 4.1 Quick Charge
6.3 inches Full HD+ Display
1080 x 2340 resolution
Pixelworks Technology
Corning Gorilla Glass 5
IP 54 Rating
Side Mounted Fingerprint Sensor
Expandable SD card slot (up to 2TB)
2. Electronic board, wiring and connection diagrams
At the moment of writing this document we are still early in the product lifecycle and
very few repairs have been necessary. Once we have a larger pool of devices that can
be investigated for board repairs, we will publish the necessary electronic board,
wiring and connection diagram.
If you need any information to facilitate your repair, please email
product.management@fairphone.com and we will be happy to share more
information.
3. List of repair and test equipment needed
Repairing FP5 is very simple and the list of required tools is short. Most of the repairs
will only need 1 and 2 below. For more complex repairs you will need tools 3 to 7.
1. Phillips screwdriver PH00 (for most of the repairs)
2. Torx screwdriver T5 (only for PCBA repairs)
3. USB-C cable (to test charging)
4. Battery Discharge Power measurement equipment
5. ESD protection gear
6. Soldering gun and solder tin
7. Software flashing tool, but can also be done using a computer. You can find the
instructions here.
4. Technical manual
Any person can access our technical manual online. There are tens of different guides
depending on the needs. See below for a selection of the 10 most important articles.
1. FP4. Charge your phone
2. FP4. Set up SIM card
3. FP4. Set up eSIM card (embedded SIM)
4. FP4. Connect to Mobile data
5. FP4. Connect to Bluetooth
6. FP4. Connect to a Wi-Fi
7. FP4. Migrate data from another phone
8. FP4. Update to the latest Fairphone OS
9. FP4. Maximize battery lifespan
10. FP4. Replace a spare part
You can access all the rest here
5. Diagnostic fault and error codes
●We make use of Android's (AOSP) default logging and tracing mechanisms, which
mostly means Android logcat messages generated by the Android framework, apps
and HAL implementations, as well as kernel logs.
●Additionally, we use logging and diagnostics in components of third party suppliers,
most of which comes from Qualcomm. These components use the same technical
mechanisms as AOSP code: Android logcat and kernel logs.
●For modem and low-level implementations, we fully rely on logging and diagnostics
implemented by our chipset vendor Qualcomm and their proprietary tooling.
●We currently mostly use a "pure-AOSP" approach -- keeping customization compared
to AOSP to a minimum -- which facilitates maintenance and longevity
●For any customization we add on top of AOSP and device-specific code (from
Qualcomm and other suppliers), we again make use of Android logcat and kernel log.
●If you encounter a pop-up with an error code "There has been an error" then you can
use usb debugging https://developer.android.com/studio/debug/dev-options and the
"adb logcat" tool to get the full log that contains all the strings to help you figure out
what the error code is.
In summary, our failure analysis relies on analyzing Android logcat, Linux kernel logs,
and additionally Qualcomm modem logs where applicable, making use of existing
tagging mechanisms from Android and Linux to identify failing components. Within
the scope of Android and Linux kernel, we currently do not have any proprietary
formal error/fault codes (e.g., numerical error codes that follow certain specifications to
identify which code would be related to what fault state). Our fault analysis relies on
the mostly text-based analysis of Android and Linux logs.
6. Component and diagnosis information
For any question on this chapter please contact
product.management@fairphone.com.
Fairphone 4 contains the following key components with the following key data
points:
Component
Part details
Vendor
Key specs
Battery
Model:
F4AC1
Kayo
Capacity : 3905 mAh
Nominal Voltage: 3.85 V
Cut off Voltage: 3.0 V
Charging Voltage: 4.4 V
Dimensions: 91.3 x 46.8 x 6.5 mm
Internal Impedance < 120 mΩ
Standard discharge: Continuous 0.2C to 3.0V
Operational Charging Temperature Range: 0-60℃
Operational Discharge Temperature Range: -20℃ - 60℃
Recommend full charge & discharge cycle once every 3-6
months.
Chipset
SM7225
Qualcomm
64 bit application processor
Dual DSP
Always on sub system & processor
Supports: GNSS, WLAN/BT, LTE, TD-SCDMA, WCDMA, GSM
and 5G NR.
Support camera interfaces: 3 x ISP, 1 x ISP-lite, 16+16+16MP
ZSL, MCTF.
Adreno 619 GPU
14 QUP (Qualcomm Universal Ports): multiplexed serial
interface functions (eights ports on GPIO and six ports
on LPI GPIO)
Display
Model:
9A-3R063-11
02B
LTPS & incell
DJN
6.3”
Outline: 71.00(W)*157.4(H)*2.09(T)
Viewing area: 67.47(W)*145.71(H)
Active Area: 67.068(W)* 145.314(H)
Viewing Direction: all directions
MIPI Interface
LCM Input voltage:
IOVCC=+1.8V(+1.95V Max)
AVDD=+5.5V(6VMax)
AVEE=-5.5V(-6V Max)
Storage Temp: -40 to 80℃
Board to
Board
Camera
Connector
Model:
BM24-30DP
/2-0.35V(51)
Tohoku
Hirose
Electric Co.
Voltage 30V A/DC
Signal contact 0.25 A
Power Contact 5.0 A
Op Temperature: -40℃ to 85℃
Storage Temperature -10℃ to 60℃
Electrical Contact Resistance: 20 mV AC or less 1kHz, 1mA
Electrical Insulation Resistance 100 V DC
Electrical Voltage Proof 150V AC for max 1 minute
Speaker
Dynamic
AAC
Dimensions: 11 x 15 x 2.5 mm
8 Ω @ 2 kHz, 1 Vrms input
Miniature
Speaker
SLS1115D-01
1 W rated noise (1.5W Max) in 0.7cc
200-20kHz Frequency range
Operating Temperature: -20℃ to +70℃
Storage Temperature: -40℃ to 85℃
Microphone
Part
Number:
SM0103B-RI
S421-M02
AAC
AOP 134 dB SPL
Power Supply Rejection (@10%THD @ 1kHz) 134 dB SPL
Min Load Resistor 5kΩ
Operating Temperature: -40℃ to +100℃
Storage Temperature: -40℃ to 100℃
Soldering Information:
Preheat 150-180℃ for a maximum of 120 secs.
Soldering Above 220℃ for a maximum of 90 secs.
Peak 260℃ for a maximum of 30 seconds.
Do not reflow more than 2 times.
There are several components in your device that can be diagnosed. We advise
you to follow our diagnosis tree in our website.
Welcome message of our diagnostics tool
Nevertheless you can also test one of the phone functions or components directly.
To do so, please go to My Fairphone App on your phone. Please only do this under
the instruction of our customer support :
- In the My Fairphone App, Click on “phone” menu
- Click on Test and Troubleshoot
- Click on “Open Internal Test App”
To exit the test mode, scroll down and press exit.
Diagnostic tests you can
perform:
a. Traceability test
b. Fingerprint sensor (raw data)
c. Touch panel (raw data)
d. Psensor (raw data)
e. SD Memory card
f. SIM
g. eSIM
h. Earpiece (top speaker)
i. Speaker (bottom speaker)
j. Bluetooth
k. Wifi 2.4G
l. WIfi 5G
m. GPS
n. Fingerprint enroll (image
capture)
o. Touch panel
p. LCD
q. LCD Backlight LEDs
r. Keyboard
s. E-compass
t. G-Sensor
u. Gyroscope
v. Front Camera
w. Main Camera
x. Ultra Wide Camera
y. Camera LED
z. Audio
aa. Vibration sensor
bb.NFC
cc. Proximity sensor
dd.Light sensor
ee. Back Light Sensor
ff. USB / Charger
gg.USB Type-C
hh.Accessory
ii. USB 3.0
jj. DP (video output)
kk. USB NTC (for temperature)
ll. Camera OTP
mm. Attestation Key Check
(tests public and private keys
to validate SW in the device)
nn.Calling
7. Instructions for software updates.
Fairphone OS releases for Fairphone 4 5G (FP4), based on Android 11 (A11), and we
provide regular software updates.
Instructions on how to download and install these updates directly on your
phone here.
Instructions on how to download and install these updates using your computer
can be found here.
Instructions on how to make a factory reset can be found here.
8. Data records of reported failure incidents
Fairphone maintains data records of failure incidents in accordance with GDPR
regulations, when customers contact us about a reported failure it is necessary for us
to hold a certain amount of data to be able to process this failure and potential return
of the product to our repair center. We also maintain records of reported failures in an
anonymised way where no customer data is required for varied business related
purposes such as cost management and future warranty provisioning. We do not
make this information available publicly. We do make information available about
certain known failures on our products on a case by case basis. For any question on
this chapter please contact product.management@fairphone.com.
9. Technical bulletins
Fairphone OS releases for Fairphone 4 5G (FP4), based on Android 11 (A11), available
for the open market. Here you will also find the updated list of new features, bug
fixes, and security patches of each release. The date and availability of system
updates may vary by network carriers or country.
To take advantage of the latest improvements and security fixes, make sure to
update to the latest Fairphone OS. In case you need to manually download the
latest software version, please go to FP4. Install Fairphone OS offline.
10. Guidance for self-repair and technical manual.
Repairing the Fairphone 4 is very easy. Any of
the actions contained in this chapter have any
consequence for your warranty.
You can find any of our video self repair videos
and a simple self-repair guide in this link.
In this document you can also find a printed
version of our repair manuals.
Tabla de contenidos
Otros manuales de Teléfono móvil de Fairphone
