Wileyfox STORM User manual

Mobile Phone STORM (Smartphone) Service Manual
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SERVICE MANUAL
For WILEY FOX STORM Only
MOBILE TERMINAL
(V1.0)
COMPANY CONFIDENTIAL
All Rights Reserved

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CONTENT
CHAPTER 1: SUMMARY....................................................................................................................4
CHAPTER 2: PCBA OVERVIEW .......................................................................................................6
2.1STORM-TOPSIDE-LAYOUT ..........................................................................................................6
2.2STORM-BACK SIDE-LAYOUT.......................................................................................................7
CHAPTER 3: EXPLANATION OF SCHEMATIC.............................................................................8
3.1 BASE BAND CHIP MSM8939 FEATURES..........................................................................................8
3.2POWER MANAGER UNIT PM8916 INTRODUCTION ...........................................................................9
3.3 RF CHIP WTR4905 DEVICE INTRODUCTION..................................................................................10
3.4 INTERFACE FUNCTIONAL CIRCUIT.................................................................................................10
3.4.1 Charging Circuit....................................................................................................................10
3.4.2 Battery connector interface ...................................................................................................11
3.4.3 Microphone Interface............................................................................................................11
3.4.4 Receiver Interface .................................................................................................................12
3.4.5 LCD Connector Interface......................................................................................................12
3.4.6 Camera Interface Circuit .......................................................................................................13
3.4.7 SIM Card Connector Interface ..............................................................................................13
3.4.8 TF card Interface...................................................................................................................14
3.4.9 Sensor Interface.....................................................................................................................14
CHAPTER 4: MOBILE FAILURE ANALYSIS................................................................................16
4.1 POWER ON ISSUE ANALYSIS ...........................................................................................................17
4.2 CHARGING ISSUE ANALYSIS ...........................................................................................................18
4.3 DISPLAY ISSUE ANALYSIS...............................................................................................................19
4.4 NO INCOMING &OUTGOING VOICE ISSUE ANALYSIS.....................................................................20
4.5HEADSET ISSUE ANALYSIS..............................................................................................................21
4.6 NO VOICE IN SPEAKER ISSUE ANALYSIS .........................................................................................22
4.7 TOUCH SCREEN ISSUE ANALYSIS....................................................................................................23
4.8 CAMERA ISSUE ANALYSIS ..............................................................................................................24
4.9 VIBRATING ISSUE ANALYSIS...........................................................................................................25

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4.10 BT/WI-FI ISSUE ANALYSIS...........................................................................................................26
4.11 FM ISSUE ANALYSIS.....................................................................................................................27
4.12 GPS ISSUE ANALYSIS...................................................................................................................28
4.13 CANNOT DOWNLOAD SOFTWARE .................................................................................................28
4.14 SIGNAL ISSUE ANALYSIS ..............................................................................................................29
CHAPTER 5: SOFTWARE UPGRADE GUIDANCE......................................................................30
5.1 PREPARATIONS BEFORE UPGRADE .................................................................................................30
5.2USB CABLE DRIVER INSTALL........................................................................................................31
5.3 SOFTWARE UPGRADE PROCEDURE ................................................................................................34
5.4 SW DOWNLOAD TROUBLESHOOTING............................................................................................38
CHAPTER 6: PRODUCT EXPLODE VIEW ...................................................................................38

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Chapter 1: Summary
The STORM is an excellent smartphone and running Google's latest Android 5.0 OS. The details
of specification shows as below:
Phone Type
Full Touch
OS System
Android 5.0
Antenna Type
PIFA
Dimension
Length/Width/Thickness:155.6mm/77.3mm/9.2 mm
Platform
MSM 8939
Band
GSM/GPRS:850/900/1800/1900 MHz
WCDMA(UMTS): BAND1(2100)\BAND8(900)
FDD-LTE:800/900/1800/2600 MHZ
SIM Card
Dual SIM, Dual online, One talk
eMMC
32G Byte+24G bit
RAM
N/A
Nand Flash
N/A
Expansion Memory
Single T-FLASH CARD (Don‟t support hot plug)

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Maximum Capacity of T-F card
( 32G ) Byte
Battery Capacity
(2500 ) mAh
Charging Time
< ( TBD ) Minutes
Talk Time
> ( TBD) Minutes
Standby Time
( TBD ) Hours
Main LCD
SIZE/Resolution/Screen Material:5.5'/FHD1920*1080/TFT
Touch Screen
Capacitive
Function Key
N/A
Side Key
Yes(Power key ,Volume key)
Top Key
N/A
Back Camera Pixel
20M AF
Front Camera Pixel
8.0Mega Fixed Focus
Bluetooth
Bluetooth 4.0
USB
USB 2.0
Wi-Fi
YES, Support Access Point
PC Sync
N/A
IrDA
N/A
Input Method
Google input
SMS
Yes
MMS
Yes
STK
Yes
Polyphonic Melody
64-Tone Wavetable
Stereo
Yes
Melody Format
MP3/MIDI/WAV/AMR/AAC/AAC+
Video Format
MP4/3GP
Recorder
Yes
FM Radio
Only support FM RX
TV
N/A
TV-OUT
N/A
I/O Connector
5PIN Micro USB
Independent Earphone Jack
Φ3.5mm
Sensor
G-Sensor, Proximity, ALS, Magnetic, Gyro
Number& Type of Speakers
( 1 ) PCS ( 1318 ) Speaker
Vibrator Mode
Independent vibrator
GPS
Yes, with navigation
Voice Recognize
N/A
Others
N/A

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Chapter 2: PCBA Overview
2.1STORM-TOP SIDE-Layout

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2.2STORM-BACK SIDE-Layout

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Chapter 3: Explanation of Schematic
3.1 Base Band Chip MSM8939 Features

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3.2Power Manager Unit PM8916 introduction
The PM8916 device integrates all wireless handset power management, general housekeeping,
and user interface support functions into a single mixed-signal IC. The versatile design is
suitable for multimode, multiband phones and other wireless products such as data card sand
PDAs. The PM8916 mixed-signal HV-CMOS device is available in the 176-pinnanoscale
package (NSP) that includes several ground pins for improved electrical ground, mechanical
stability, and thermal continuity. Since the PM8916 device includes so many diverse
functions, its operation can be under stood better by studying the major functional blocks
individually. Therefore, the PM8916 document setis organized by the device functionality as
follows:
Input power management
Output power management
General housekeeping
User interfaces
IC interfaces
–either multipurpose pins (MPPs) or general-purpose input/output
(GPIOs) –that can be configured to function within some of the other categories.
Figure 3.2 PM8916 Function Block Diagram

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3.3 RF Chip WTR4905 device introduction
The WTR4x05 device is a highly-integrated multimode, multiband RF CMOS transceiver IC. The
WTR4x05 device cannot be used as stand-alone on MSM9x35/MSM8994
andMDM9x40/MDM9x45 modems.
All chipsets support advance RF techniques by adding a second RFIC
WTR4905-baseddesigns
–Add WTR2100 to support DSDA and/or SG-LTE
–Add WTR2605 to support SV-LTE
WTR3925-based designs supporting MSM8994, MSM8996, MDM9x35M, MDM9x45,
and Fusion 4.5
–Add WTR4605 to support DSDA, SG-LTE, and/or SV-LTE
It integrates RF
receive and transmit features into a 3.22 ×3.22 ×0.57 mm package to simplify handset
design, minimize parts count, and reduce DC power consumption.
3.4 Interface Functional Circuit
3.4.1 Charging Circuit
Figure 3.4.1-STORM Charging Circuit

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3.4.2 Battery connector interface
Figure 3.4.2STORM Battery connector
3.4.3 Microphone Interface
Figure 3.4.3-1STORMMain Mic1 Circuit (On Sub-board)
Figure 3.4.3-2STORMANC Mic2 Circuit

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3.4.4 Receiver Interface
Figure 3.4.4 STORM Receiver Circuit
3.4.5 LCD Connector Interface
Figure 3.4.5-1 STORM LCD Connector Interface
Figure 3.4.5-2 STORM LCD Backlight Circuit

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3.4.6 Camera Interface Circuit
Figure 3.4.6-1 STORM Main Camera circuit
Figure 3.4.6-2 STORM Front Camera circuit
3.4.7 SIM Card Connector Interface
Figure 3.4.7-1 STORM SIM1 Connector

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Figure 3.4.7-2 STORM SIM2 Connector
3.4.8 TF card Interface
Figure 3.4.8 STORM TF-Card Interface
3.4.9 Sensor Interface
Figure 3.4.9-1 STORM Ambient light and Proximity Sensor Circuit

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Figure 3.4.9-2 STORM Magnetic Sensor
Figure 3.4.9-3 STORM Gyro and G-sensor connector

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Chapter 4: Mobile Failure Analysis
Basically, STORM main failure cases including:
Power on problem (No power on, Auto-Power on/off, Phone totally dead, Restart
automatically)
Charging problem (No charging)
Camera issue ( cannot connect camera)
Touch failure (Cannot touch, shift)
Display failure (No display, LCD backlight malfunction, Segments missing, Black display,
and Contrast malfunction)
Signal problem (No signal, Weak signal, No signal intermittent)
Other Function problem ( No ringing tone, No vibration, Vibrator abnormity, Cannot read
SIM /T-F card, Phone password locked, Cannot upgrade software, Show "high
temperature", FM Radio fault, Bluetooth issue, Wi-Fi issue, etc.)
In the mobile circuit system, all the electrical connecting trace can be divided into three types,
such as power supply trace, controlling trace and data/ signal trace. When analyzing the RF failure
case, for the active circuit we should first check the power supply, then control circuit followed by
the signal flow path to remove the failure step by step. When debugging the RF malfunction, we
should diagnose the RX part first before TX.

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4.1 Power on issue analysis
Cannot Power On
Is battery normal or not? Go recharge battery or
replace it
Measure
U300_E5(MSM_RESIN_N),
and other output circuit
Measure the Power On current
No Current Small Current Large Current
Measure VBAT,
PWRKEY and 26M
CLK
Check which chip
has abnormal temp
Re-flash FW
Replace Flash
Replace the
corresponding
IC
If all normal,
resolder or
replace CPU
N
Y
Figure 4.1 Power on failure repair process
1) Battery cannot power on
❶Check the battery is normal or not, if the battery is broken or lower voltage, replace it;
❷Check battery connector (J100) is normal or not, if the connector is broken, missing, disconnect,
re-solder or replace it; ❸Check the power on switcher is normal or not, if it is abnormal, replace
it; completed all above steps, you still cannot solve this issue, please follow the next steps.
2) No power on Current
❶If the mobile phone can‟t powered on by battery, we can use the DC Power Supply to check the
mobile phone‟s power on current. After connect mobile phone with DC Power Supply, press
power on key, then check the current value;❷For No current (0mA) issue, it means power supply
circuit problem, and we can follow the product circuit diagram to check this power supply circuit

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step by step until find out the defective component.
3) Small power on Current
For small current issue, it means software or periphery circuit problem, we can try to upgrade the
new software or check all of the periphery circuit.
4) Large power on Current
For high current issue, it means this mobile phone must be short circuit, the most probable cause
chipset are Baseband IC (U600), Memory IC, RF IC, RF PA (GSM & WCDMA), ESD protection
Diode, etc.). We can attempt to touch these chipset, and feel the temperature is normal or not. If
one of the chipset‟s temperatures is abnormal, replace it.
4.2 Charging issue analysis
Cannot Charge
Upgrade FW
Is the connection of
USB Sub-board OK? Reassemble or replace connector
Is VBAT_SNS of
U300, VPH_PWR of
U101 OK?
Resolder or
Replace U300
Replace U101
Is the battery and
battery FPC OK? Replace battery
Y
Y
Y
N
N
N
Figure 4.2 Charging failure repair process
❶Upgrade new software for the mobile phone; ❷Check Battery and Charger; ❸Check Battery

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Connector (J100) , USB Connector; ❹Replace the Switching charger U101 or PMU U300 and
test it again. If problem still not solved, you need to follow the product circuit diagram to check
CPU; ❺After repaired, enter into „Factory Mode‟ by press “Power on” key, volume “-”key the
same time for three seconds. Select “Battery” and then plug in USB cable you can verify the
function now.
4.3 Display issue analysis
Upgrade
Firmware
LCD Display Issue
Is the connection of
LCD and Sub board
OK?
Is LCD OK?
Is there backlight? Is PMW_OUT normal Is VPH_PWR,VLED_P
of U900 normal
IS VCC, LCD_VDDIO
of J900 are all normal?
Replace CPU
Replace PMU
Replace LCD
Module
Reassemble
connectors
Replace U900
N
Y
Y
Y
Y
N
NY
N
Y
N
N
1
Figure 4.3 Display failure repair process
❶Upgrade new software for the mobile phone; ❷STORM‟s LCD is connected to mainboard
with FPC. We can check the FPC and FPC connector (J900) is normal or not, if it is abnormal, re-
solder or replace it. ❸After upgrade new software and LCD replaced, the problem is still not
solved. Please try to follow the product circuit diagram to check the LCD data path, LCD power

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supply path and CPU.
4.4 No Incoming & Outgoing Voice issue analysis
REC Issue
Upgrade Firmware
Is signal
CDC_EAR_P/M
normal?
Is Receiver OK?
Check R804 and R807
especially.
Replace PMU
Replace REC
Y
Y
N
N
Is the connection of
receiver OK? Reassemble REC
Figure 4.4-1 No received voice failure repair process
Microphone Issue
Upgrade
Firmware
Measure Mic_IN1_P by
Oscilloscope is OK or
not.
Check R806,R805
and etc. Otherwise,
replace microphone
Replace PMU
N
Y
Figure 4.4-2 No outgoing voice failure repair process