The purpose of this document is to provide enhanced technical information for Sony Ericsson
repair technicians in order to assist during service, repair and troubleshooting operations on Sony
Ericsson mobile phones. It should be used as a complement to other repair instructions and tools
as notifi ed by the local Sony Ericsson representative.
To search for components throughout the entire document use the “search” function in Adobe
Acrobat Reader 7.0 (or later version) and enter the component name or other word. Use zoom to
enlarge.
For easier navigation of the document you can use the bookmarks that appear in the Bookmarks
tab on the left side of the Adobe Acrobat Reader window. Each bookmark jumps to a page in the
document.
Disclaimer
This document is Sony Ericsson confi dential and should be treated as confi dential in accordance
with the agreement with Sony Ericsson. This document is intended for use by authorized service
technicians only. Sony Ericsson is not to be held responsible for any damages or losses caused
intentionally or unintentionally due to unauthorised use of the information in this document.
Note
When disassembling and reassembling the phone the instructions and processes described in the
Mechanical Working Instructions, the Generic Repair Manual and the Repair Center Handbook
must be followed.
Revision History
Rev.DateChanges / Comments
106/19/2009Initital revision.
ABOUT Contents
ABOUT 2
Contents 2
Equipment List 3
TROUBLESHOOTING 8
Power On/Off Problems 8
USB and Software Flash Problems 8
Dead Phone Problems 9
Display Problems 10
Display Illumination Problems 11
Opto Sensor Problems 11
On-Off Key Problems 12
Numeric Keypad Problems 12
Navigation Keypad Problems 13
Volume Up and Down Button Problems 13
Camera Button Problems 14
Play & Camera Mode Button Problems 14
Navigation Keypad LED Problems 15
Numeric Keypad LED Problems 16
Camera Button LED Problems 16
Tally LED Problems 17
Trickle Charge LED Problems 17
Flash LED Problems 18
Camera Lens LED Problems 19
Camera Cover Detect Problems 19
Main Camera Problems 20
VGA/VTF Camera Problems 21
Data Communication Problems 21
Charging Problems 22
USB/VBUS Charging Problems 22
SIM Problems 23
Memory Stick Problems 23
Microphone Problems 24
Earphone Problems 24
Loudspeaker Problems 25
Handsfree Aux Earphone Problems 25
Handsfree Aux Microphone Problems 25
Handsfree Connection Problems 26
FM Radio Problems 27
FM Radio Antenna Problems 27
Bluetooth Problems 28
GSM Network Problems 28
WCDMA Problems 29
A-GPS Problems 30
Accelerometer Problems 30
Vibrator Problems 31
Real Time Clock Problems 31
Slide Sensor Problems 32
TV Out Problems 32
System Connector Protection Test 33
Current Consumption Test 33
Backup Capacitor Test 35
Charging Test 35
ASIC Revision Test 36
Measurement Points Pictures 37
MEASUREMENT POINTS
Primary Side 50
Secondary Side 51
Camera SIM FPC 52
Main Flex Assy FPC 53
Navigation Keypad FPC 54
Keypad FPC 55
Top Schematic 56
Audio Top 57
Audio Analog 58
Audio Digital 59
Audio FM Radio 60
SEMC Troubleshooting Manual
Application & System Performance Top 61
System Top 62
System Control - Clocks & Resets 63
System Memories 64
System PoP IF 65
Power Top 66
Power Regulators & Charging 67
Power Imaging 68
Power ASICs 69
Connectivity Top 70
Connectivity Top 71
Connectivity I2C & ADC 72
Connectivity Cards 73
Connectivity 74
Imaging Top 75
Imaging Display 76
Imaging Camera 77
Imaging Camera 78
Imaging LMU 79
Imaging Flash LED 80
Access Top 81
Access GSM & UMTS 82
Access Bluetooth 83
Access AGPS 84
Camera SIM FPC 85
Main Flex Assy FPC 86
Navigation Keypad FPC 87
Keypad FPC 88
COMPONENT OVERVIEW 89
Primary Side 89
Secondary Side B - C 90
Secondary Side L - Z 91
FUNCTIONAL OVERVIEW
Technical Description 92
Platform Block Diagram 103
Block Diagram Power Distribution 104
Block Diagram Clocking Concept 105
Note! The resistance between GND and BDATA should be approximately 120 KOhm.
Instruments
Power Supply Channel 1 (VBATT)
Agilent 6632B or similar
Location: CSPN – Repair Instructions – Mechanical – Tool Catalogue – RepairToolsCatalogue.pdf
Instrument Settings:
Voltage: 3.8 Volt
Limiter: 2.0 A
Note! Max cable length between the Power Supply Channel 1 VBATT and the dummy battery is 1
metre. The cable must have a capacity for at least 16A.
ABOUT
Info: Additional information about the equipment used for TRS can be found in the following
location: CSPN – Repair Instructions – Mechanical – Tool Catalogue – RepairToolsCatalogue.pdf or
matris.xls – C Model Tab.
Power Supply Channel 2 (DCIO/SEPI)
Agilent 6632B or similar
Location: CSPN – Repair Instructions – Mechanical – Tool Catalogue – RepairToolsCatalogue.pdf
Instrument Settings:
Voltage: 5.0 Volt
Limiter: 2.0 A
Oscilloscope
Agilent DSO7052A or similar
Location: CSPN – Repair Instructions – Mechanical – Tool Catalogue – RepairToolsCatalogue.pdf
Digital Multimeter (DMM)
Fluke 83 or similar
Location: CSPN – Repair Instructions – Mechanical – Tool Catalogue – RepairToolsCatalogue.pdf
Note! The 0, 64 mm Test Probes is recommended by Sony Ericsson when the DMM is in use,
Connect the CST-75 charger Red or White wire to the Plus Output and the Black wire to the Minus
(GND) Output at backside of the Power Supply Channel 2 (DCIO/SEPI) according to Picture 8.
Picture 8
Step 3:
Cut off insulating material from back side of the charger plug according to Picture 9.
Picture 9
ABOUT
Customized Power Supply Channel 2 Cable (DCIO/SEPI)
Customize the cable according to following instructions below:
(Step 1, Step 2, Step 3 and Step 4)
Step 1:
Take the CST-75 battery charger and cut of the charger according to Picture 7.
Picture 7
Note! The Cable length must be exact 1.3 metre.
Step 4:
Connect DCIO Cable and SEPI Interface Cable – A1 according to Picture 10.
Picture 10
1228-1147 rev. 1
5 (129)
Page 6
ABOUT
Equipment List
SEMC Troubleshooting Manual
C903
Picture 11
Note! This is setup is wrong!
Connection Instructions for the Dummy Battery
This is correct setup when the Dummy Battery is in use.
See Pictures 12 and 13.
Picture 12
Customized FM Radio Cable
Step 1:
Use the Test lead BNC-4mm 1,5m Cable, see Picture 14.
Picture 14
Product Name: Test lead BNC-4mm 1,5m
Product Description: Test lead with 4 mm lab plugs at one end and a BNC plug at the other.
Manufacturer: PMK Germany
Location: http://www.elfa.se/en/
or other supplier.
Part number: 46-310-40
Note! This is the ELFA part number.
Step 2:
Cut the Red Lab Plug connector according to Picture 15.
Picture 15
ABOUT
Picture 13
Step 3:
Use any Hands-Free (PHF) Cable and cut it according to Picture 16.
Picture 16
Note! Cable length should be at least 40cm.
1228-1147 rev. 1
6 (129)
Page 7
ABOUT
Equipment List
SEMC Troubleshooting Manual
C903
Step 4:
Use only the Wire that is connected to PIN2 and cut off all others according to Picture 17.
Picture 17
Note! Use DMM instrument to ensure which of the wires are connected to PIN2 at Hands-Free
(PHF) system connector plug.
Step 5:
Connect the Cable from the Picture 15 and Cable from the Picture 17 according to Picture 18.
Note! Use soldering iron for this action and then use insulating material to protect the contact
point.
Picture 18
Test SIM GSM/UMTS
One Test SIM GSM/UMTS is needed to perform Current Consumption Test, see Picture 20.
Location: CSPN – Repair Instructions – Mechanical – Tool Catalogue – RepairToolsCatalogue.pdf
Note! To buy a Test SIM GSM/UMTS, please contact your supplier of test equipment.
Picture 20
Sony Memory Stick M2
Any functional Memory Stick Micro M2 Card
See Picture 21.
Picture 21
ABOUT
Test Cards
Local SIM
Any functional Local SIM Card
See Picture 19.
Picture 19
SMK RF Probe
Location: CSPN – Repair Instructions – Mechanical – Tool Catalogue – RepairToolsCatalogue.pdf
Part number: SXA 109 6356
See Picture 22.
Picture 22
1228-1147 rev. 1
7 (129)
Page 8
TROUBLESHOOTING Power On/Off Prob lems
- USB and Sof tware Flash Problem s
SEMC Troubleshooting Manual
C903
START
Use the
Dummy Battery Connected to
Power Supply Channel 1
(VBATT)
No
Is the
phone consuming
any current when
powering on the
phone
Yes
Power On/Off Problems
Is the phone
consuming more than
1mA when the phone
is powered off
No
Is it possible to
power on the phone
Connect a chargerNo
Yes
Yes
Is it possible to power
off the phone
Is the phones
behavior as normal
Optimized
charging
No
Yes
No
Yes
On-Off Key Problems
Go to
Dead phone
Problems part 1
TRS guide
Go to
Current
Consumption Test
After this go to
Charging Test
Go to
TRS guide
START
Step 1:
Perform
System Connector Protection Test
If successful go to step 2.
Step 2:
Download ITP SW into the Phone
Go to
USB/VBUS
Charging Problems
USB and Software Flash Problems
Is the
Flash process
Start-up when using
EMMA SW
No
Use TRS Fixture
1: Connect: VBATT and DCIO/SEPI
2: Remove: DCIO/SEPI
3: Connect: USB Cable from the PC
Does
the Phone
Indicate charging
on the display
Yes
No
YesNo
Is the
ITP SW Flash
Successful
Is MP 14
(X2405_Pin 10)
Short circuit to
GND
No
Yes
Yes
SL 5 Replace
N2020
SL 4 Escalate
Replace
V2421
TROUBLESHOOTING
Is the current
consumption between
10mA to 70mA
Yes
Flash
the phone with
correct CDA
software
Flash
The phone with
the ETS software.
Is the ETS SW Flash
Successful
No
Go to
Data Communication
Problems
TRS guide
No
No
Flash
the phone with
correct CDA
software
CDA Software
Flash
Successful
Yes
1. Customize the phone into DPY/Z
2. Startup the phone and wait for
the configuration to take place
(takes less than a minute)
3. Customize with correct CDA
Yes
4. Activate the phone
Is the Problem
solved
No
Go to
Dead Phone
Problems part 1
TRS guide
Press ”C”
Connect USB from PC.
Update SEMC BOOT if
necessary. Run EMMA
SUCR SW. Is Phone
Flash Ok
No
Is the
Flash process
started
Yes
Yes
SL 4 Replace
N2420
SL 5 Replace
R2442
Go to
System Connector
No
NoYes
Protection Test
After this go to
Data Communication
Problems TRS guide
Is the Problem
solved
Yes
Claim for a
SW Upgrade
SL 4 Replace
N2420
SL 5 Replace
N2010
No
Yes
5 Volt DC at
MP 75 (C2433)
Yes
2.7V – 3.3V DC
at MP 68 (C2437) and
1.8V DC at MP 76
(C2435)
Yes
Remove the PBA from the
TRS Fixture
Max
2 Ohm between
MP 14 (X2405_Pin 10)
and MP 65 (Z2400_Pin 2)
Yes
Max
2 Ohm between
MP 15 (X2405_Pin 11)
and MP 66
(Z2400_Pin 3)
No
No
No
No
Is MP 15
(X2405_Pin 11)
Short circuit to
GND
SL 4 Replace
N2420
SL 5 Replace
N2010
Max
0.5 Ohm between
MP 14 (X2405_Pin 10)
and MP Z2400_Pin 1)
Max
0.5 Ohm between
MP 15 (X2405_Pin 11)
and MP 64
(Z2400_Pin 4)
Yes
Yes
Yes
No
No
Replace
V2420
Replace
X2405
Replace
Z2400
Replace
X2405
Replace
Z2400
1228-1147 rev. 1
8 (129)
Page 9
TROUBLESHOOTING Dead Phone Proble m s
SEMC Troubleshooting Manual
C903
START
Try to recover the Phone by using
Connect USB Cable to the Phone
and update SEMCBOOT after this
If successful claim SW Flash
If not continue with Step 2.
current consumption
Step 1:
EMMA SW
Press key 2 and 5
Run EMMA SUCR SW
and retest the Phone
Step 2:
Use TRS Fixture
Connect: VBATT Only
Replace
N2420 or N1200
SL 5 Remove
N2000
SL 4 Escalate
Is the
still more than
1mA
Yes
SL 4 Replace
N2420
SL 5 Replace
N2000
Replace
N1211
Yes
No
current consumption
more than 1mA
Try to trace
Faulty Component
by using Freezing Spray
N2420 or N1200
getting hot
No
No
SL 5 Replace
SL 4 Escalate
Try to trace Faulty
Component by using
Freezing Spray
At MP 86 (C2209
VDDE18) and 2.8V DC at
MP 119 (C1251
LDOA_OUT)
at MP 110 (C1253)
Dead Phone Problems part 1
Is the
Yes
Is
N2000
1.8V DC
Yes
2.8V DC
Yes
No
NoNo
MP 35 (X2201_Pin 4) and
DCIO/SEPI to the Phone
Is the
connection between
MP 27 (X1040 / PBA
GND) Ok
Yes
Connect:
32 kHz
at MP 79 (C2100)
Yes
32 kHz RTCCLK at
MP 106 (R1404)
Yes
26 MHz
SYSCLK1 at
MP 89 (SP2108)
Go to
Dead Phone
Problems part 2
SL 4 Escalate
No
No
No
Yes
No
SL 5 Replace
X2201 or R2200
SL 4 Escalate
SL 5 Replace
B2100 or N2000
SL 5 Replace
SL 4 Escalate
Check the following
Voltages:
2.6V MP 84 (C2402 VAUDIO26)
2.5V MP 90 (C2208 VANA25)
2.7V MP 120 (C2210 VBT27)
2.7V MP 117 (C2211 VDIG)
2.6V MP 109 (C2212 VBEAR26)
1.2V MP 61 (C2220 VCORE12)
1.8V MP 56 (L2202 VCORE18)
all Voltages
N2000
Are
Ok
Is the
VAUDIO26
Voltage
Ok
Yes
Is the
VANA25
Voltage
Ok
Yes
Is the
VBT27
Voltage
Ok
Yes
Is the
VDIG
Voltage
Ok
Dead Phone Problems part 2
START
Before following this guide the
Dead Phone Problems part 1 TRS guide
No
NoYes
No
No
NOTE !
must be finished.
Is N2422
getting hot
Is any of
N2200 or N2010
getting hot
Is N1300
getting hot
Is any of
N2411 or N1300
getting hot
Yes
No
No
Yes
No
Yes
TROUBLESHOOTING
Replace
N2422
SL 5 Replace
N2000
SL 4 Escalate
SL 4 Replace
N2200
SL 5 Replace
N2010
SL 5 Replace
N2000
SL 4 Escalate
Replace
N1300
SL 5 Replace
N2000
SL 4 Escalate
Replace
N2411 or N1300
Replace
N1200 or N1300
SL 5 Replace
N2010
SL 4 Escalate
SL 5 Replace
N2020
SL 4 Escalate
Go to Data
Communication
Problems TRS guide
Yes
Yes
1.8V DC
at MP 108 (R2115)
No
Is the
ITP SW Flash
Successful
No
Step 1:
Disconnect:
VBATT and DCIO/SEPI
Step 2:
Main Flex Assy and Navigation PBA
Press the ”C” key and Connect
USB Cable from the PC to the PBA
Flash the Phone with the ETS SW
Connect:
Assy to the PBA
Connect: VBATT Only
Step 3:
Use EMMA SW
Yes
Yes
Is the
VBEAR26
Voltage
Ok
Yes
No
No
Is X4202
damaged
No
SL 5 Replace
N2000
SL 4 Escalate
Go to
Dead Phone
Problems part 3
Yes
Replace
X4202
1228-1147 rev. 1
9 (129)
Page 10
TROUBLESHOOTING
Dead Phone Proble m s - D is p l ay Proble m s
SEMC Troubleshooting Manual
C903
Is the
VCORE12
Voltage
Ok
Yes
No
Dead Phone Problems part 3
START
Before following this guide the
Dead Phone Problems part 2 TRS guide
1.1V – 1.2V DC
at MP 74
(V2201_Cathode)
Yes
1.1 – 1.2V DC
at MP 61 (C2220)
NOTE !
must be finished.
No
Yes
No
3.8 Volt DC at
MP 67 (L2201)
SL 5 Replace
N2000 or N2010
SL 4 Escalate
Replace
L2200
Yes
No
SL5 Replace
L2201
SL4 Escalate
SL 5 Replace
V2201 or N2000
SL 4 Escalate
Main Flex Assy, Navigation PBA Assy and Display to the PBA
Go to
Display illumination
Problems TRS guide
Display Problems
START
Load ETS SW into the Phone
Use TRS Fixture Display Holder and Connect:
If Display is working on the TRS Fixture then Replace
Display, Main Flex Assy or Navigation PBA Assy
If not continue with the Display Problems TRS guide
No
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Display Pattern
Activate:
TV Test Pattern
Is the
Display Backlights
Ok
TROUBLESHOOTING
Is the
VCORE18
Voltage
Ok
Yes
Step 1:
Disconnect:
VBATT and DCIO/SEPI
Step 2:
Connect:
Main Flex Assy and Navigation PBA
Assy to the PBA
Connect: VBATT Only
Step 3:
Use EMMA SW
Press the ”C” key and Connect
USB Cable from the PC to the PBA
Flash the Phone with ETS SW
No
Is MP 56 (L2202)
Short circuit to GND
No
Disconnect:
VBATT and DCIO/SEPI
Is
L2202 = Max 0.5 Ohm
Is the
ETS SW Flash
Successful
Yes
No
Yes
No
Yes
SL 4 Replace
N2200
SL 5 Replace
C2231 or N2010
SL 5 Replace
L2202
SL 4 Escalate
SL 4 Replace
N2200
SL 5 Replace
N2010
SL 5 Replace
N2020
SL 4 Escalate
Go to Data
Communication
Problems TRS guide
Go to
TV OUT Problems
TRS guide
Go to
Opto Sense
Problems TRS guide
SL 5 Replace
N2010
SL 4 Escalate
No
No
No
Yes
Is TV OUT
Ok
Yes
Is the picture
too dark or
too light
Yes
Replace
X4202
Is the Display
Problem solved
Yes
Claim Component
X4202
1228-1147 rev. 1
10 (129)
Page 11
TROUBLESHOOTING Display Illumin at io n Prob le m s
- Opto Sensor Prob le m s
SEMC Troubleshooting Manual
C903
Display Illumination Problems
START
Step 1:
Flash the Phone with EMMA SUCR SW
If successful claim SW Flash
If not go to step 2.
Step 2:
Load ETS SW into the Phone
Use TRS Fixture
Use TRS Fixture Display Holder and Connect:
Main Flex Assy, Navigation PBA Assy and Display to the PBA
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Led and Backlight
Activate:
Display Backlight
If Display Backlight is working on the TRS Fixture then Replace
Display, Main Flex Assy or Navigation PBA Assy
If not continue with the
Display illumination Problems TRS guide
1: Use Fault trace SW and go to:
MMI
Misc
Init Screen Testing
Led and Backlight
Deactivate:
Display Backlight
2: Disconnect the Main Flex Assy and remove
the Display Holder from the TRS Fixture
Yes
3.7V - 3.8V DC at
MP 57 (N4201_Pin 3)
No
3.7V - 3.8V DC
at MP 25 (TP4200)
Yes
No
SL 4 Replace
N4201
SL 5 Replace
L4201
Replace
L4200
Go to
Display illumination
Problems TRS guide
Go to
Dispaly Problems
TRS guide
Opto Sense Problems
START
Replace Main Flex Assy and retest the Phone
If successful claim Main Flex Assy
Replace Navigation PBA Assy and retest the Phone
If successful claim Navigation PBA Assy
Replace Display and retest the Phone
If successful claim Display
Opto Sense Problems TRS guide
No
No
Step 1:
if not go to step 2.
Step 2:
If not go to step 3.
Step 3:
if not continue with the
Is the
Display
illumination (LEDs)
Ok
Yes
Can you see
any picture/image in
the Display
Yes
TROUBLESHOOTING
SL 4 Replace
V4200
SL 5 Replace
N2000
Replace
X4202
No
0 Volt DC at
MP 26 (TP4201) and
MP 20 (TP4202)
Yes
Replace
N4201
Yes
Yes
Fault trace SW
MMI
Misc
Init Screen Testing
Led and Backlight
Activate:
Display Backlight
17V - 20V
Pk-Pk Pulses
at MP 25 (TP4200)
Shortly after the Display
Backlight has been
Activated
No
Fault trace SW
MMI
Misc
Init Screen Testing
Led and Backlight
1: Deactivate:
Display Backlight
2: Activate:
Display Backlight
More
than 4 Volt Pk-Pk
Pulses at MP 58 (N4201_Pin1)
Shortly after the Display
Backlight has been
activated
No
SL 5 Replace
N2000
SL 4 Escalate
SL 5 Replace
N2000
SL 4 Escalate
Replace
N2210
SL 5 Replace
N2000
SL 4 Escalate
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
1.8V – 2.3V
Pk-Pk Pulses at
No
No
NoYes
MP 107 (R2250 OPTO_EN)
Shortly after phone
Power On
Yes
3V – 3.5V
Pk-Pk Pulses at
MP 37 (TP2203 VOPTO30)
Shortly after phone
Power On
Yes
Replace
X4202
Is the
Opto Sensor Problem
solved
Claim Component
X4202
1228-1147 rev. 1
11 (129)
Page 12
TROUBLESHOOTING On-Off Key
- Numeri c Keypad Proble m s
SEMC Troubleshooting Manual
C903
Replace
V2470
SL 5 Replace
V2480, R2459, R2471
or N2010
SL 4 Escalate
On-Off Key Problems
START
Replace Navigation PBA Assy and retest the Phone
If successful claim Navigation PBA Assy
Replace Main Flex Assy and retest the Phone
If successful claim Main Flex Assy
Connect: VBATT and DCIO/SEPI
Yes
No
Step 1:
if not go to step 2.
Step 2:
if not go to step 3.
Step 3:
Use TRS Fixture
1.8 Volt DC
at MP 44
(V2470_Anode)
Yes
Is the
Problem with
Power Off
No
Numeric Keypad Problems
START
Load ETS SW into the Phone
Connect Key Flex Assy and Keyboard to the PBA
Perform Keypad Scan Test by pressing all
Keypads on the Key Flex Assy and the Camera Button (S2403)
If successful Replace Key Flex Assy
Numeric Keypad Problems TRS guide
SL 5 Replace
V2480 or N2010
SL 4 Escalate
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW and go to:
If not then continue with the
MMI
Misc
Init Screen Testing
Activate
Keypad Scan Test
Yes
MP 50 (V2480_Pin C2)
Is
Short circuit to
GND
No
1: Disconnect the VBATT and DCIO/SEPI
Disconnect the Key Flex Assy from the PBA
2: Connect the VBATT and DCIO/SEPI again
Is the
Yes
Camera Button
S2403
Ok
No
TROUBLESHOOTING
Go to
Camera Button
Problems TRS guide
SL 4 Replace
X4202
SL 5 Replace
N2000
SL 4 Replace
V2470 or X4202
SL 5 Replace
N2000
Yes
3.7 Volt DC
at MP 46
(V2470_Cathode)
No
SL 5 Replace
R2454, R2470 or
N2010
SL 4 Escalate
SL 5 Replace
V2482 or N2010
SL 4 Escalate
SL 5 Replace
R2456, R2475 or
N2010
SL 4 Escalate
SL 5 Replace
V2476 or N2010
SL 4 Escalate
SL 4 Replace
X2400
SL 5 Replace
R2485, R2486, R2487
R2488 or R2489
No
Yes
No
Yes
1.8 Volt DC
at MP 50
(V2480_Pin C2)
Is MP 51
(V2482_Pin C1)
or MP 53 (V2482_Pin
C2) Short circuit to
GND
No
1.8 Volt DC
at MP 51
(V2482_Pin C1)
Is
MP 47 (V2476_Pin C1)
Short circuit to
GND
No
Yes
Yes
Yes
No
MP 45 (V2481_Pin C2)
Is
Short circuit to
GND
No
1.8 Volt DC
at MP 45
(V2481_Pin C2)
1.8 Volt DC
at MP 53
(V2482_Pin C2)
Yes
Is
MP 91 (V2472_Pin C2)
Short circuit to
GND
Yes
No
No
Yes
SL 5 Replace
V2481 or N2010
SL 4 Escalate
SL 5 Replace
R2493, R2472 or
N2010
SL 4 Escalate
SL 5 Replace
R2491, R2474 or
N2010
SL 4 Escalate
SL 5 Replace
V2472 or N2010
SL 4 Escalate
1228-1147 rev. 1
12 (129)
Page 13
TROUBLESHOOTING
Nav i g at i on Keypad Proble m s - Volume Up an d D own Bu t t on Prob l e m s
SEMC Troubleshooting Manual
C903
Navigation Keypad Problems
START
Step 1:
Go to Service Tests Menu and perform Keyboard Test
If successful flash the Phone with EMMA SUCR SW
if not go to step 2.
Step 2:
Load ETS SW into the Phone
Use TRS Fixture
Use TRS Fixture Display Holder and Connect:
Main Flex Assy and Navigation PBA Assy to the PBA
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Activate
Keypad Scan Test
Perform Keypad Scan Test by pressing all Navigation Keypads
If successful Replace Navigation PBA Assy or Main Flex Assy
If not then continue with the
Navigation Keypad Problems TRS guide
Volume + and - Button Problems
START
Step 1:
Go to Service Tests Menu and perform Keyboard Test
If successful flash the Phone with EMMA SUCR SW
if not go to step 2.
Step 2:
Load ETS SW into the Phone
Use TRS Fixture
Connect: SIM Flex Assy to the PBA
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Activate
Keypad Scan Test
Perform Keypad Scan Test by pressing Volume + and - Buttons
If successful replace SIM Flex Assy
If not then continue with the
Volume + and – Button Problems TRS guide
TROUBLESHOOTING
SL 4 Replace
X4202
SL 5 Replace
R2489 or N2010
1: Disconnect the VBATT and DCIO/SEPI
2: Disconnect and Remove the
Main Flex Assy and Navigation PBA Assy
No
from the TRS Fixture
Are all
Numeric Keys
Ok
Yes
Is
MP 48 (V2476_Pin C2)
Short circuit to
GND
No
Yes
Go to
Numeric Keypad
Problems TRS guide
SL 5 Replace
V2476 or N2010
SL 4 Escalate
Replace
X4300
Yes
Are all
Numeric Keys
Ok
No
Numeric Keypad
Problems TRS guide
Go to
1228-1147 rev. 1
13 (129)
Page 14
TROUBLESHOOTING Camera Butto n Prob le m s
- Play & Camera Mode Butt o n Probl e m s
SEMC Troubleshooting Manual
C903
Camera Button Problems
SL 5 Replace
V2472, V2471 or
N2010
SL 4 Escalate
START
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
Is MP 93
Yes
(S2403_Pin B)
and MP 94 (S2403_Pin
C1) Short circuit
to
GND
No
Yes
1.8 Volt DC
at MP 92
(S2403_Pin A1)
Replace
Key Flex Assy
Play and Camera Mode Button Problems
START
Go to Service Tests Menu and perform Keyboard Test
If successful flash the Phone with EMMA SUCR SW
Play and Camera Mode Button Problems TRS guide
Yes
if not continue with the
Are all
Numeric Keys
Ok
No
Problems TRS guide
TROUBLESHOOTING
Go to
Numeric Keypad
SL 5 Replace
N2010
SL 4 Escalate
Replace
S2403
Yes
(S2403_Pin A1)
No
0 Volt DC
at MP 92
Press the
S2403 Camera Button
SL 5 Replace
V2481 or N2010
SL 4 Escalate
Replace
S2403
SL 5 Replace
R2492, R2473 or
N2010
SL 4 Escalate
Yes
Yes
(S2403_Pin A1)
Short circuit to
1.8 Volt DC
at MP 100
(V2481_Pin C1)
No
No
Is MP 92
GND
No
1228-1147 rev. 1
14 (129)
Page 15
TROUBLESHOOTING
N avigatio n Keypad LE D Prob le m s
SEMC Troubleshooting Manual
C903
Navigation Keypad LED Problems part 1
START
Load ETS SW into the Phone
Use TRS Fixture
Remove the Dome Foil Navi PBA and Light Block Navi
PBA from the Navigation PBA
Use the TRS Fixture Display Holder and Connect
Navigation PBA and Main Flex Assy to the PBA
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Led and Backlight
Activate:
Navigation Keypad
Are all
Navigation PBA
LEDs On
(except V8450)
No
Yes
Navigation Keypad
LED Problems part 2
Go to
Navigation Keypad LED Problems part 2
TROUBLESHOOTING
START
Note! Before following this guide
the Navigation Keypad Problems part 1
TRS guide must be finished.
1: Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Deactivate:
Navigation Keypad
2: Activate:
CleraKey BLUE LED
SL 4 Replace
X4202
SL 5 Replace
N2000
SL 4 Replace
N4240
SL 5 Replace
N2000
Are
No
No
all WHITE LEDs
Ok
Yes
Check the following BLUE LEDs:
V8431, V8434,
V8440, V8441, V8442 and V8443
3.8 Volt DC
at MP 55
(N4240_Pin 3)
Yes
Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Activate:
Navigation Keypad
Check the following WHITE LEDs:
V8420, V8421, V8422, V8423
V8424, V8425, V8426 and V8427
Are the
BLUE LEDs
Ok
No
1: Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Deactivate:
Navigation Keypad
2: Disconnect VBATT and DCIO/SEPI and
Remove the TRS Fixture Display Holder
3: Connect VBATT and DCIO/SEPI
0 Volt DC
at MP 55
(N4240_Pin 3)
Yes
No
Yes
Replace
Main Flex Assy or
Navigation PBA
Assy
Replace
N4240 or N2410
Replace
X4202
Replace
N4240 or X4202
Is V8450
”C” Key BLUE LED
Yes
Ok
No
1: Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Deactivate:
CleraKey BLUE LED
2: Disconnect VBATT and DCIO/SEPI and
Remove the TRS Fixture Display Holder
3: Connect VBATT and DCIO/SEPI
4: Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Activate:
CleraKey BLUE LED
1.8 Volt DC
Yes
at MP54
No
(N4240_Pin 1)
Replace
Main Flex Assy or
Navigation PBA
Assy
Replace
N2410
1228-1147 rev. 1
15 (129)
Page 16
TROUBLESHOOTING Numeri c Keypad LED Probl e m s
- Camera Butto n LED Problems
SEMC Troubleshooting Manual
C903
Numeric Keypad LED Problems
START
Load ETS SW into the Phone
Use TRS Fixture
Connect: Key Flex Assy to the PBA
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Led and Backlight
Activate:
Numeric Keypad
If Numeric Keypad LED is working on the TRS Fixture
then Replace Key Flex Assy
If not then continue with the
Numeric Keypad LED Problems TRS guide
SL 4 Replace
X2400
SL 5 Replace
V4112 or N2000
Camera Button LED Problems
TROUBLESHOOTING
START
SL 4 Replace
V4350 or V4360
SL 5 Replace
N2000
1228-1147 rev. 1
16 (129)
Page 17
TROUBLESHOOTING Tally LED Problems
- Trickle Cha rg e LED Problems
SEMC Troubleshooting Manual
C903
Replace
N2410
Tally LED Problems
START
Load ETS SW into the Phone
Connect: VBATT and DCIO/SEPI
Continue with the Tally LED Problems TRS guide
No
Use TRS Fixture
Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Led and Backlight
Activate:
Tally LED
1.8 Volt DC
at MP 30 (R4310)
Yes
SL 4 Replace
V4310
SL 5 Replace
V4311
SL 5 Replace
N2000
SL 4 Escalate
Trickle Charge LED Problems
START
Load ETS SW into the Phone
Connect: VBATT and DCIO/SEPI
Continue with the Trickle Charge LED Problems
No
Use TRS Fixture
Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Led and Backlight
Activate:
Charge LED
TRS guide
1.8 Volt DC
at MP 95
(V4350_Anode)
Yes
TROUBLESHOOTING
Replace
V4350 or V4360
1228-1147 rev. 1
17 (129)
Page 18
TROUBLESHOOTING Flash LED Problems
SEMC Troubleshooting Manual
C903
Flash LED Problems in Camera Mode
START
Step 1:
Go to Service Test and perform the Main Camera Test
If successful go to step 2, if not go to
Main Camera Problems TRS guide.
Step 2:
Replace Camera 5MPixel CMOS Slim
If successful claim Camera 5MPixel CMOS Slim
if not go to step 3.
Step 3:
Replace SIM Flex Assy
If successful claim SIM Flex Assy
if not go to step 4.
Step 4:
Load ETS SW into the Phone
Use TRS Fixture
Connect the Main Camera to the PBA
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Led and Backlight
Activate:
Flash LED
Flash LED Problems in Torch Mode
START
Load ETS SW into the Phone
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Led and Backlight
Activate:
Flash LED
3.8 Volt DC at
MP 97 (R4115)
No
Yes
TROUBLESHOOTING
Replace
V4110, V4111
or N4401
Is the
Flash LED
Ok
Yes
1: Use Fault Trace SW and go to:
MMI
Misc
Init Screen Testing
Led and Backlight
Deactivate:
Flash LED
2: Activate
Main Camera
1.8 Volt DC at
MP 98 (R2298)
Yes
No
No
Go to Flash LED
Problems in
Torch Mode
Replace
N2410
SL 4 Replace
N4401
SL 5 Replace
N2000 or N2010
Yes
3.8 Volt DC at
MP 96 (L4102)
No
Replace
L4102
SL 4 Replace
N4401 or X4300
SL 5 Replace
N2000 or N2010
1.8 Volt DC at
MP 99 (C2298)
NoYes
Replace
N2271
1228-1147 rev. 1
18 (129)
Page 19
TROUBLESHOOTING Camera Lens LE D Prob le m s
- Camera Cover Detect Problem s
SEMC Troubleshooting Manual
C903
Replace
N2410
Camera Lens LED Problems
START
Replace SIM Flex Assy and retest the Phone
If successful claim SIM Flex Assy
Load ETS SW into the Phone
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW and go to:
Continue with the Camera Lens LED Problems TRS guide
No
Step 1:
if not go to step 2.
Step 2:
Use TRS Fixture
MMI
Misc
Init Screen Testing
Led and Backlight
Activate:
Camera Lens LED
1.8 Volt DC
at MP 19 (R4320)
Yes
SL 4 Replace
X4300
SL 5 Replace
V4321
Replace
SIM Flex Assy
Camera Cover Detect Problems
START
Replace Battery Cover Assy and retest the Phone
If successful claim Battery Cover Assy
Connect SIM Flex Assy to the PBA
Connect: VBATT and DCIO/SEPI
Camera Cover Detect Problems TRS guide
NOTE! The MP is located on the SIM Flex Assy
Step 1:
If not go to step 2.
Step 2:
Use TRS Fixture
Continue with the
1.8 Volt DC
at MP 121
(B8400_Pin 1)
NoYes
TROUBLESHOOTING
SL 4 Replace
X4300
SL 5 Replace
N2010
1228-1147 rev. 1
19 (129)
Page 20
TROUBLESHOOTING Main Camera Problems
SEMC Troubleshooting Manual
C903
Main Camera Problems part 1
Use Fault Trace SW and go to:
Ignore these messages when they appear
(In the right corner of the Fault Trace SW)
Error_CommandFailed, ERR:”
”
Use Fault Trace SW and
Repeat the Main Camera Test
MMI
Misc
Init Screen Testing
Activate:
Main Camera Test
NOTE !
in the Trace window
1.8 Volt DC
at MP 87 (N2206_Pin 4)
Shortly after the Main
Camera Test has been
activated
Yes
No
Flash the Phone with EMMA SUCR SW and go to Service Tests Menu
SL 5 Replace
N2010
SL 4 Escalate
No
1.8 Volt DC
at MP 88 (R2290)
Shortly after the Main
Camera Test has been
activated
START
Step 1:
Perform: Main and VGA/VTF Camera Tests
If the Tests are successful then claim SW Flash
Replace Camera 5 Mpixel CMOS Slim and retest the Phone
If successful claim Camera 5 Mpixel CMOS Slim
Replace SIM Flex Assy and retest the Phone
if not go to step 2.
Step 2:
If not go to step 3.
Step 3:
If successful claim SIM Flex Assy
If not go to step 4.
Step 4:
Load ETS SW into the Phone
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW
Main Camera Problems part 2
Use Fault Trace SW and
Repeat the Main Camera Test
START
Before following this guide the
Main Camera Problems part 1
TRS Guide must be finished.
Repeat the Main Camera Test
Yes
NOTE !
Use Fault Trace SW and
1.8 Volt DC
at MP 28 (TP2215)
Shortly after the Main
Camera Test has been
activated
No
TROUBLESHOOTING
Replace
N2206
Replace
N2290
Go to
Main Camera
Problems Part 2
Yes
Use Fault Trace SW and
Repeat the Main Camera Test
2.8 Volt DC
at MP 29 (TP2216)
No
Shortly after the Main
Camera Test has been
activated
Yes
Use Fault Trace SW and
Repeat the Main Camera Test
1.8 Volt DC
at MP 32 (TP2214)
No
Shortly after the Main
Camera Test has been
activated
Yes
Replace
N2290
No
2.8 Volt DC
at MP 33 (TP2213)
Shortly after the Main
Camera Test has been
activated
Yes
Use Fault Trace SW and
Repeat the Main Camera Test
SL 5 Replace
N2010
SL 4 Escalate
Replace
X1040 or X1041
No
No
1.2 Volt DC
at MP 31 (TP2217)
Shortly after the Main
Camera Test has been
activated
Yes
26 MHZ
CAMSYSCLK
at MP 52 (C2103 Shortly )
after the Main Camera
Test has been
activated
Yes
Are
MP 27 (X1040)
and X1041
connected to
GND
Yes
Replace
X4300
No
Disconnect
VBATT and DCIO/SEPI
Are
L2260 and L2261
= Max 1 Ohm
Is the
Main Camera Problem
Solved
No
No
Yes
Yes
Replace
N2203
Replace
L2260 or L2261
Claim Component
X4300
SL 5 Replace
S4300 or N2010
SL 4 Escalate
1228-1147 rev. 1
20 (129)
Page 21
TROUBLESHOOTING VGA/VTF Cam e ra Probl e m s
- Data Communi cation Problems
SEMC Troubleshooting Manual
C903
This TRS guide is valid ONLY for C903 phones with VGA/VTF Camera support.
Flash the Phone with EMMA SUCR SW and go to Service Tests Menu
If not then continue with the VGA/VTF Camera Problems TRS guide
SL 4 Replace
X4202
SL 5 Replace
N4300, N4301, N4302
N4303, N4304 or
N4305
VGA/VTF Camera Problems
START
NOTE !
Step 1:
Perform the: Main and VGA/VTF Camera Tests
If the Tests are successful then claim SW Flash
Replace the Main Flex Assy and retest the Phone
If successfull claim Main Flex Assy
Replace the Navigation PBA Assy and retest the Phone
If successfull claim Navigation PBA Assy
Yes
if not go to step 2.
Step 2:
If not go to step 3.
Step 3:
Is the
Main Camera
Ok
No
Go to
Main Camera
Problems TRS guide
START
Step 1:
Perform
System Connector Protection Test
If successful go to step 2.
Step 2:
Dowload ETS SW into the Phone
Go to
USB/VBUS
Charging Problems
SL 5 Replace
R2442
SL 4 Escalate
Data communication Problems
Is the
Flash process
Start-up when using
EMMA SW
No
1: Connect: VBATT and DCIO/SEPI
3: Connect: USB Cable from the PC
No
Use TRS Fixture
2: Remove: DCIO/SEPI
Is
the USB
Charging
Ok
5 Volt DC at
MP 75 (C2433)
Yes
TROUBLESHOOTING
No
YesNo
No
Is the
ETS SW Flash
Successful
Is
MP 14 (X2405_Pin 10)
Short circuit to GND
No
Is
MP 15 (X2405_Pin 11)
Short circuit to the
GND
Yes
Yes
Yes
SL 5 Replace
N2020
SL 4 Escalate
Replace
V2421
Replace
V2420
Is the
VGA/VTF Camera
Problem Solved
No
Yes
Claim Component
Faulty Component
SL 5 Replace
N2010
SL 4 Escalate
SL 4 Replace
N2420
SL 5 Replace
N2010
Yes
Yes
2.7V – 3.3V DC
at MP 68 (C2437) and
1.8V DC at
MP 76 (C2435)
Yes
Remove the PBA from the
TRS Fixture
Max
2 Ohm between
MP 14 (X2405_Pin 10)
and MP 65
(Z2400_Pin 2)
Yes
Max
2 Ohm between
MP 15 (X2405_Pin 11)
and MP 66
(Z2400_Pin 3)
No
No
No
SL 4 Replace
N2420
SL 5 Replace
N2010
Max
0.5 Ohm between
MP 14 (X2405_Pin 10)
and MP 63
(Z2400_Pin 1)
Max
0.5 Ohm between
MP 15 (X2405_Pin 11=
and MP 64
(Z2400_Pin 4)
Yes
No
No
SL 5 Replace
X2405
SL 4 Escalate
Replace
Z2400
SL 5 Replace
X2405
SL 4 Escalate
Yes
Replace
Z2400
1228-1147 rev. 1
21 (129)
Page 22
TROUBLESHOOTING Charging Problems
- USB/VBUS Charging Problems
SEMC Troubleshooting Manual
C903
Charging Problems
START
Step 1:
Perform Charging Test
If NOT
successful go to step 2.
Step 2:
Use TRS Fixture
Connect:
VBATT and DCIO/SEPI
Is X2201
damaged
Yes
Is MP 36 (TP2202)
Short circuit to GND
No
Yes
SL5 Replace
X2201
SL4 Escalate
SL 5 Replace
N2000
SL 4 Escalate
USB/VBUS Charging Problems
START
Perform the System Connector Protection Test
If successful go to step 2.
Use Phone with the Signalling SW (SSW)
Use TRS Fixture and connect: VBATT
Connect: USB Cable from the PC to the Phone
Step 1:
Step 2:
5V – 5.2V DC at
MP 70 (N2421_Pin 4)
No
Yes
TROUBLESHOOTING
SL 5 Replace
N2000
SL 4 Escalate
Replace
R2490 or R2449
No
No
5 Volt DC at
MP 18 (C2440)
No
Is MP 18 (C2440)
Short circuit to GND
No
Disconnect:
VBATT and DCIO/SEPI
Is the
R2490 and R2449
=Max 1 Ohm
Yes
Yes
Yes
SL 4 Replace
V2202
SL 5 Replace
N2000
SL 4 Replace
C2440, V2412 or
V2202
SL 5 Replace
C2441 or N2000
SL 4
Escalate
SL 5
Replace X2405
Replace
N2421
Yes
5V – 5.2V DC at
MP 8 (X2405_Pin 1)
Yes
Disconnect:
VBATT and USB Cable
Is L2468 = Max 1 Ohm
No
No
SL5 Replace
X2405
SL4 Escalate
Replace
L2468
1228-1147 rev. 1
22 (129)
Page 23
TROUBLESHOOTING SIM Problems
- Memory Stick Problem s
SEMC Troubleshooting Manual
C903
Activate:
SIMVCC
SIMVCC On
Activate:
SIMRSTn
Please follow instructions from 1 to 5
1: Disconnect: VBATT and DCIO/SEPI
2: Disconnect: SIM Flex Assy from the PBA
3: Restart the Fault Trace SW
4: Connect: VBATT and DCIO/SEPI
5: Use Fault Trace Sw and go to:
Logic
SIM Card Control
1.8 Volt DC at
MP C2420
Yes
SIM Problems
Flash the Phone with the EMMA SUCR SW and retest the Phone
NoYes
START
Step 1:
if successful claim SW Flash, if not go to step 2.
Load ETS SW into the Phone
Connect: SIM Flex Assy to the PBA and Insert the Test SIM
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW and go to:
If the SIM Com Test is passed then Replace SIM Flex Assy
If not then continue with the SIM Problems TRS guide
Is the
C2414 Short
circuit
Step 2:
Use TRS Fixture
Logic
SIM Card Control
Activate:
SIM Com Test
No
SL 5 Replace
C2414
SL 4 Escalate
SL 5 Replace
N2000
SL 4 Escalate
Memory Stick Problems
START
Is X2403
damaged
Yes
TROUBLESHOOTING
Replace
X2403
1.8 Volt DC at
MP C2419
Yes
SIMVCC On
SIMRSTn On
Activate:
SIMCLK
1MHz and
1.8V – 2V Pk-Pk at
MP SP2407
Yes
SIMVCC On
SIMRSTn On
SIMCLK On
Activate:
SIMDAT
No
No
Is the
C2419
Short circuit
SL 5 Replace
N2010 or N2000
SL 4 Escalate
1.8 Volt DC
at MP R2416
No
Yes
Yes
SL 5 Replace
C2419
SL 4 Escalate
SL 5 Replace
N2000 or N2010
SL 4 Escalate
Replace
X4300
No
Load ETS SW into the Phone
Insert Memory M2 Card
Use TRS Fixture
Connect:
VBATT and DCIO/SEPI
Use Fault Trace SW
Fault trace SW
Logic
SIM Card control
Activate:
Memory Stick Test
Is the
Memory Stick Test
Passed
Flash the Phone with
Yes
EMMA SUCR SW
SL 5 Replace
N2000
SL 4 Escalate
Yes
No
1.8 Volt DC at
MP C2413
No
SL 5 Replace
N2010
SL 4 Escalate
SL 4 Replace
X2403
SL 5 Replace
N2000
No
No
1.8 Volt DC at
MP 43 (C2422
VMC18)
Yes
SL 4 Replace
X2403
SL 5 Replace
N2010
1228-1147 rev. 1
23 (129)
Page 24
TROUBLESHOOTING Microphone Problems
- Earphone Problems
SEMC Troubleshooting Manual
C903
Microphone Problems
START
Step 1:
Load ETS SW into the Phone
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW
Step 2:
Continue with the
Microphone Problems TRS guide
Use Fault Trace SW and go to:
Audio and FM Radio
Audio Loop Test
Audio Input: Mic1
Loop Mode: Analog
Audio Output: Loudspeaker
Apply Audio Loop
Earphone Problems
START
Step 1:
Replace Main Flex Assy and retest the Phone
If successful claim Main Flex Assy
If not go to step 2.
Step 2:
Load ETS SW into the Phone
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW
1: Use Fault Trace SW and go to:
Audio and FM Radio
Audio Tone
Activate:
INIT TONE TEST
Activate:
Earphone
TROUBLESHOOTING
Replace
B3100
Yes
2.2 Volt DC at
MP 115 (R3119)
No
SL 5 Replace
N2000
SL 4 Escalate
Replace
X4202
More than
400mV AC Pk-Pk
YesNo
1 kHz signal at MP 21
(TP3104) and MP 22
(TP3105)
SL 5 Replace
N2000
SL 4 Escalate
1228-1147 rev. 1
24 (129)
Page 25
TROUBLESHOOTING Loudspe aker Prob l e m s
- Handsfree Au x E a rphone Proble m s
SEMC Troubleshooting Manual
C903
Loudspeaker Problems
START
Replace Rear Cover Assy and retest the Phone
If successful claim Rear Cover Assy
Load ETS SW into the Phone
Connect: VBATT and DCIO/SEPI
Earphone Problems TRS guide
1: Use Fault Trace SW and go to:
Step 1:
If not go to step 2.
Step 2:
Use TRS Fixture
Use Fault Trace SW
Continue with the
Audio and FM Radio
Audio Tone
Activate:
INIT TONE TEST
Activate:
Loudspeaker
Can you
hear a 1 kHz tone
from the TRS Fixture
Loudspeaker
Yes
Replace
X3102
Hands-Free (PHF) Aux Earphone Problems
START
Before starting check if the Hands-Free (PHF) Connection is Ok.
System Connector Protection Test
If successful go to step 2.
Load ETS SW into the Phone
Connect: VBATT and DCIO/SEPI
Use Hands-Free (PHF) Set
Hands-Free (PHF) Aux Earphone Problems TRS guide
1: Use Fault Trace SW and go to:
2: Disconnect: DCIO/SEPI from the PBA
3: Connect the PHF set to the PBA
Note !
Step 1:
Perform the
Step 2:
Use TRS Fixture
Use Fault Trace SW
Continue with the
Audio and FM Radio
Audio Tone
Activate:
INIT TONE TEST
Activate:
PHF Earphone
TROUBLESHOOTING
SL 4 Replace
N3100
SL 5 Replace
N2000
No
Is
any of MP 24
(TP3102) or MP 23
(TP3103) Short Circuit to
GND (Measure on the TRS
Fixture)
No
1.8 Volt DC
at MP 49 (R3153)
Yes
Disconnect:
VBATT and DCIO/SEPI
Remove the PBA from the TRS Fixture
Are
L3110 and L3111
= Max 1 Ohm
Yes
No
NoYes
SL 4 Replace
N3100
SL 5 Replace
C3107 or C3108
SL 4 Replace
N2410
SL 5 Replace
N2010
SL 5 Replace
L3110 or L3111
SL 4 Escalate
SL 5 Replace
X2405
SL 4 Escalate
SL 5 Replace
N2000 or N2010
SL 4 Escalate
SL 4 Replace
N3101
SL 5 Replace
N2000 or N2010
Replace
L2406
More than
300mV AC Pk-Pk
Yes
No
Yes
1 kHz signal at MP 12
(L2403) and
MP 13 (L2404)
No
More than
400mV AC Pk-Pk
1 kHz signal at MP 82
(C3149) and
MP 81 (C3150)
Yes
Disconnect VBATT and PHF Set and
Remove PBA from the TRS Fixture
Is L2406
= Max 1 Ohm
No
Can you
hear the 1 kHz tone
In the PHF
Earphone
Are
L2403, L2404,
= Max 2 Ohm
Yes
NoYes
Is any of
C2447 or C2448
Short Circuit
YesNo
No
Go to
Hands-Free (PHF)
Aux Microphone
Problems TRS guide
Replace
L2403 or L2404,
SL 5 Replace
C2447 or C2448
SL 4 Escalate
1228-1147 rev. 1
25 (129)
Page 26
TROUBLESHOOTING Handsfree Au x Mi cro p h o ne Prob l e m s
- Connecti o n Probl e m s
SEMC Troubleshooting Manual
C903
Hands-Free (PHF) Aux Microphone Problems
START
Note !
Before starting check if the Hands-Free (PHF) Connection is Ok.
Step 1:
Perform the
System Connector Protection Test
If successful go to step 2.
Step 2:
Load ETS SW into the Phone
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW
Use Hands-Free (PHF) Set
Continue with the
Hands-Free (PHF) Aux Microphone Problems TRS guide
1: Use Fault Trace SW and go to:
Audio and FM Radio
Audio Loop Test
Audio Input: AUX1
Loop Mode: Analog
Audio Output: Loudspeaker
Apply Audio Loop
Replace
N2422
Hands-Free (PHF) Connection Problems
START
Step 1:
System Connector Protection Test
Hands-Free (PHF) Connection Problems TRS guide
Yes
Perform the
If successful go to step 2.
Step 2:
Power On the Phone
Use Hands-Free (PHF) Set
Continue with the
Can You
see the PHF icon
in the Phone Display
when the PHF set is
attached
NOT
No
Connect:
Hands-Free (PHF) Set
to the Phone
TROUBLESHOOTING
SL 4 Replace
N3101
SL 5 Replace
C3158 or N2000
SL 5 Replace
R3156 or N2000
SL 4 Escalate
Yes
MP 69 (C3158)
Short Circuit
to the GND
No
2: Disconnect: DCIO/SEPI from the PBA
3: Connect the PHF set to the PBA
Can You
Flash the Phone with
EMMA SUCR SW
Can you
hear any sound
from the TRS Fixture
Loudspeaker when
blowing into the
PHF Mic
No
Is
No
2V - 2.2V DC
at MP 69 (C3158)
Yes
Yes
Go to
Hands-Free (PHF)
Aux Earphone
Problems TRS guide
YesNo
see the PHF
icon in the Phone
Display
SL 4 Replace
N2422
SL 5 Replace
X2405 or N2010
SL 4 Replace
N3101
SL 5 Replace
X2405, C2462 or
C2463
VBATT and Hands-Free (PHF) Set
Remove the PBA from the TRS Fixture
Yes
Disconnect:
Are
L2401 and L2402
= Max 2 Ohm
No
Replace
L2401 or L2402
1228-1147 rev. 1
26 (129)
Page 27
TROUBLESHOOTING FM Radio Problems
- FM Radio Anten na Prob l e m s
SEMC Troubleshooting Manual
C903
Go to
Loudspeaker
Problems TRS guide
Go to
Hands-Free (PHF)
Problems TRS guide
START
No
Yes
Is the
Loudspeaker
Ok
FM Radio Problems
No
FM Radio
Is not
working both with
Loudspeaker and
PHF set
Yes
Replace
L2408
START
No
FM Radio Antenna Problems
Is L2408
= Max 1 Ohm
Is the
FM Radio Problems
TRS guide
done?
Yes
Use the
Digital Multimeter Instrument (DMM)
for these measurements
No
TROUBLESHOOTING
Go to
FM Radio Problems
TRS guide
SL 5 Replace
N2000
SL 4 Escalate
SL 5 Replace
C3145 or C3146
SL 4 Escalate
1: Remove the DCIO/SEPI Cable
Frequency: 103 MHz
Amplitude/Level: 50 μV
FM Dev: +/-22.5 kHz
FM Rate: 1 kHz
Yes
2: Connect:
Customized FM Radio Cable
Black Lab Plug to
TRS Fixture GND Input and
PHF Connector to the
Phone System Connector
Signal Generator
Instrument Settings:
More than
40 mV AC Pk-Pk
1 KHz signal at MP 7
(C3145) and MP 6
(C3146)
Is any of
C3145 or C3146
Short circuit
1: Load ETS SW into the Phone
2: Use TRS Fixture
Connect:
VBATT and DCIO/SEPI
3: Use Fault Trace SW and go to:
Audio and FM Radio
FM Radio
Audio Output: Loudspeaker
Frequency: 103 MHz
Set Fm Radio
Signal Generator
NoYes
No
Instrument Settings:
Change Amplitude/Level to:
800 μV
Is there
any signal on
MP 7 (C3145) and
MP 6 (C3146)
Yes
Problems TRS guide
Go to
FM Radio Antenna
SL 5 Replace
L3300
SL 4 Escalate
No
Yes
Is L3300
= Max 1.5 Ohm
Replace
N1300
Is the
Signal
Ok
Yes
Yes
Yes
No
Is C3306
Short Circuit
No
Is MP 9
(X2405_Pin 2)
Connected to
GND
Replace
V2413
Claim Component
N1300
Yes
No
SL 5 Replace
C3306
SL 4 Escalate
SL 5 Replace
X2405
SL 4 Escalate
SL 4 Replace
N1300
SL 5 Replace
N2010
No
1.8 Volt DC
NoYes
at MP 10 (R3302
FM_INT)
Replace
N1300
1228-1147 rev. 1
27 (129)
Page 28
TROUBLESHOOTING Bluetooth Probl e m s
- GSM Networ k Prob l e m s
SEMC Troubleshooting Manual
C903
1: Load ETS SW into the Phone
2: Use TRS Fixture
Connect:
VBATT and DCIO/SEPI
3: Use Fault Trace SW
4: Use RF Probe connected to
the Spectrum Analyzer
Instrument
NOTE! Do not use 10:1 Divider
Spectrum Analyzer
Instrument Settings:
Frequency: 2402 MHz
Span: 10 MHz
Amplitude: 10 dBm
Use Peak Search (MKR)
Yes
Bluetooth Problems
Flash the Phone with EMMA SUCR SW and retest the Phone
Fault trace SW Settings:
TX and RX
Bluetooth
Channel 0
Set MaxPwr MOD 0
NOTE!
MODE 0 Frequency should be
2401.84 MHz
(±0.05 MHz)
3 dBm at
MP 4 (X1300_Pin 1)
Blt MaxPwr MOD 0
(±3 dBm)
START
Step 1:
If successful claim SW Flash
If not go to step 2.
Step 2:
Continue with the
Bluetooth Problems TRS guide
No
START
Replace Rear Cover Assy and retest the Phone
If successful claim Rear Cover Assy
Load ITP SW into the Phone
Perform SERP Calibration and retest the Phone
If successful claim SERP Calibration
Disassembly the Phone and continue with the
GSM Network Problems TRS guide
Replace
Faulty Component
SL 5 Replace
R1204, R1206 or
C1209
SL 4 Escalate
Step 1:
If not go to step 2.
Step 2:
If not go to step 3.
Step 3:
No
No
GSM Network Problems
Are
X1000, X1002
X1003,X1010,X1011,
X1030 and X1210
connected to
GND
Yes
Max 1 Ohm
between MP 42
(ST1200) and MP 41
(X1200_Pin 2)
Yes
Yes
Max 0.5
Ohm between
MP 40 (X1200_Pin 1) and
MP 41
(X1200_Pin 2)
Replace
N1200
No
TROUBLESHOOTING
Replace
X1200
Replace
N1300
Replace
BT_Antenna
or N1300
No
No
Fault trace SW Settings:
TX and RX
Bluetooth
Channel 0
Turn Off
(This must be done before
the next step)
Set MaxPwr MOD 1
NOTE!
MODE 1 Frequency is
2402.16 MHZ
(±0.05 MHz)
3 dBm at
MP 4 (X1300_Pin 1)
Blt MaxPwr MOD 1
(±3 dBm)
Yes
Is
MOD 1 Freq.
at least 230 KHz
higher than
MOD 0 Freq.
Yes
-1 dBm
at MP 3
(W1300_Pin 5) and
MP 5 (W1300_Pin 7)
(±5 dBm)
No
2.7 Volt DC at
MP 120 (C2210
VBT27)
Yes
Yes
No
Replace
W1300 or X1300
SL 5 Replace
N2000
SL 4 Escalate
SL 4 Replace
N1300 or N2410
SL 5 Replace
N2010
Is the
GSM Network
Problem
solved
No
Yes
Claim Component
N1200
SL 5 Replace
N2010 or N2000
SL 4 Escalate
1228-1147 rev. 1
28 (129)
Page 29
TROUBLESHOOTING WCDMA Problems
SEMC Troubleshooting Manual
C903
This TRS guide can be used ONLY for C903 phones with WCDMA BAND I, II or V
Go to
GSM Network
Problems TRS guide
Replace
N1200
WCDMA BAND I,II,V Network Problems
START
NOTE !
Perform SERP Calibration and retest the Phone
Load ETS SW into the Phone
If successful claim SERP Calibration
Connect: VBATT and DCIO/SEPI
No
No
Step 1:
If not go to step 2.
Step 2:
Use TRS Fixture
Use Fault Trace SW
Is the
GSM Network
Ok
Yes
Is the
Problem with
WCDMA TX
Yes
Fault Trace SW
TX and RX WCDMA
Radio Settings:
Select Band: BAND I
Fast select channels:
Set Low Channel
Ch LOW
Modes: Max Pwr 23dBm
WCDMA BAND VIII Network Problems
START
This TRS guide can be used ONLY for C903 phones with WCDMA BAND VIII support
Perform SERP Calibration and retest the Phone
Go to
GSM Network
Problems TRS guide
Replace
N1200
Go to
SERP Calibration
Load ETS SW into the Phone
If successful claim SERP Calibration
Connect: VBATT and DCIO/SEPI
No
No
NOTE !
Step 1:
If not go to step 2.
Step 2:
Use TRS Fixture
Use Fault Trace SW
Is the
GSM Network
Ok
Yes
Is the
Problem with
WCDMA TX
Yes
TROUBLESHOOTING
Fault Trace SW
TX and RX WCDMA
Radio Settings:
Select Band: BAND VIII
Fast select channels:
Set Low Channel:
Ch LOW
Modes: Max Pwr 23dBm
Replace
N1200
Replace
N1210
Replace
L1200
Replace
N1210
Is the
WCDMA TX
Problem solved
Yes
No
2.5V – 3V DC at
MP 114 (C1215
No
VBATT and DCIO/SEPI
= Max 0.5 Ohm
Yes
No
N2000 or N2010
WPA_A_EN)
Disconnect:
Is L1200
SL 5 Replace
SL 4 Escalate
Yes
Yes
3V – 3.8V DC at
MP 113 (C1206
VCC_WPA)
No
1.8 Volt DC at
MP 111 (R1220
WPA0_EN)
No
SL 5 Replace
N2010
SL 4 Escalate
Replace
N1200
Replace
N1210
Replace
L1200
Replace
N1210
Is the
WCDMA TX
Problem solved
Yes
No
2.5V – 3V DC at
No
VBATT and DCIO/SEPI
Yes
No
N2000 or N2010
MP 116 (C1214
WPA_C_EN)
Disconnect:
Is L1200
= Max 0.5 Ohm
SL 5 Replace
SL 4 Escalate
Yes
Yes
3V – 3.8V DC at
MP 113 (C1206
VCC_WPA)
No
1.8 Volt DC at
MP 112 (R1222
WPA2_EN)
No
SL 5 Replace
N2010
SL 4 Escalate
Yes
Claim Component
N1210
Yes
Claim Component
N1210
1228-1147 rev. 1
29 (129)
Page 30
TROUBLESHOOTING A- G PS Probl e m s
- Accelerometer Probl e ms
SEMC Troubleshooting Manual
C903
Replace
N2410
No
No
1.8 Volt DC
At MP 102 (R1402
AGPS_LDO_EN)
Yes
1.8 Volt DC
At MP 105 (R1401
AGPS_PWRON)
Yes
A-GPS Problems
Go to Service Tests Menu and perform the GPS System Test
START
Step 1:
If successful Flash the Phone with EMMA SUCR SW
if not go to step 2.
Step 2:
Replace A-GPS Antenna and retest the Phone
If successful claim A-GPS Antenna
if not go to step 3.
Step 3:
Replace A-GPS PBA and retest the Phone
If successful claim A-GPS PBA
if not go to step 4.
Step 4:
Replace Main Flex Assy and retest the Phone
If successful claim Main Flex Assy
if not go to step 5.
Step 5:
Load ETS SW into the Phone
Use TRS Fixture
Connect: VBATT and DCIO/SEPI
Accelerometer Problems
START
Go to Service Tests Menu and perform the Accelerometer Test
If successful Flash the Phone with EMMA SUCR SW
Use Dummy Battery connected to Power Supply Channel 1 (VBATT)
Load ETS SW into the Phone
Step 1:
if not go to step 2.
Step 2:
Connect: DCIO/SEPI
Use Fault Trace SW
Fault Trace SW
General
Asic Revisions
Read All
TROUBLESHOOTING
26 MHz at
MP 103 (R2117
AGPS_CLK)
Yes
1: Disconnect:
VBATT and DCIO/SEPI
2: Connect:
VBATT and DCIO/SEPI
SL 5 Replace
N2010
SL 4 Escalate
No
No
1.8V Pk-Pk Pulses
at MP 104 (C1407)
Shortly after phone
1: Disconnect:
VBATT and DCIO/SEPI
VBATT and DCIO/SEPI
1.8V Pk-Pk Pulses
at MP 101 (C1406)
Shortly after phone
SL 4 Replace
N2410
SL 5 Replace
N2102
More than
Power On
Yes
2: Connect:
More than
Power On
No
Yes
SL 5 Replace
N2010
SL 4 Escalate
Replace
X4202
Is
Accelerometer
(N2411)
Asic Revision
0x3b
Yes
Fault Trace SW
MMI
Misc
Init Screen Testing
Activate:
Accelerometer Test
NOTE! Read X, Y, Z information in
the Info Box.
Flash the Phone with
EMMA SUCR SW
Replace
N2411
No
NOTE! Read X, Y and Z information
NOTE! Repeat this Test Sequence
Yes
No
Replace
N2411
Move the Phone and
Activate
Accelerometer Test again
in the Info Box.
10 Times
Can
you see
that X, Y and Z
information are
changing in the
info box
SL 5 Replace
N2010
SL 4 Escalate
No
Is the
Accelerometer
Problem solved
Yes
Claim Component
N2411
1228-1147 rev. 1
30 (129)
Page 31
TROUBLESHOOTING Vibrator Proble m s
- Real Time Clock Problem s
SEMC Troubleshooting Manual
C903
Replace
B4200
Vibrator Problems
START
Load ETS SW into the Phone
Connect: VBATT and DCIO/SEPI
Use Fault Trace SW and go to:
Yes
Step 1:
Step 2:
Use TRS Fixture
MMI
Misc
Init Screen Testing
Activate:
Vibrator Test
2.7V – 3.5V
Pk-Pk Pulses DC at
MP 85 (C4208)
START
Does
the phone
gain or lose
time
Real Time Clock Problems
Yes
Perform:
SERP Calibration
TROUBLESHOOTING
SL 5 Replace
C4208
SL 4 Escalate
Yes
No
Is C4208
Short circuit
No
SL 5 Replace
N2000
SL 4 Escalate
No
Perform:
Backup Capacitor
Test
Is the
Test Passed
No
Yes
Is there
still problems with
gaining or losing
time
Flash the Phone with
EMMA SUCR SW
SL 5 Replace
N2000 or C2214
SL 4 Escalate
Yes
No
Claim
SERP Calibration
SL 5 Replace
B2100
SL 4 Escalate
1228-1147 rev. 1
31 (129)
Page 32
TROUBLESHOOTING Slide Sens or Prob l e m s
- TV Out Prob lems
SEMC Troubleshooting Manual
C903
Slide Sensor Problems
START
Step 1:
Replace Rear Assy Slider and retest the Phone
If successful claim Rear Assy Slider
If not go to step 2.
Step 2:
Continue with the
Slide Sensor Problems TRS guide
SL 4 Replace
B4410
SL 5 Replace
N2010
TV OUT Problems
START
around the N2700 and N2102 components to prevent component
Be careful when cutting the Shield Can Fence
Flash the Phone with EMMA SUCR SW
If successful claim SW Flash
Load ETS SW into the Phone
Use Fault Trace SW and go to:
SL 5 Replace
N2010
SL 4 Escalate
NOTE !
damage.
Step 1:
If not go to step 2.
Step 2:
Use TRS Fixture
Connect:
VBATT and DCIO/SEPI
MMI
Misc
Init Screen Testing
Display Pattern
Activate:
TV Test Pattern
No
1.8 Volt DC at
MP 71 (R2281)
No
Is the
Display Backlights
Ok
Yes
Is the
Display
Ok
Yes
Is MP 11
(X2405_Pin 7)
Short circuit to PBA
GND
No
No
Yes
TROUBLESHOOTING
Go to
Display illumination
Problems TRS guide
Go to
Display Problems
TRS guide
Replace
V2430
SL 5 Replace
N2296
SL 4 Escalate
Replace
N2410
SL 5 Replace
N2700 or N2102
SL 4 Escalate
No
No
No
Yes
1.5 Volt DC at
MP 72 (C2297
VTV15)
1.8 Volt DC at
MP 17 (R1301)
Yes
26 MHz at
MP 118 (R2130
TV_CLK)
Yes
Yes
Yes
1.8 Volt DC at
MP 77 (R2288
VTV30_EN)
Yes
3 Volt DC at
MP 78 (C2289
VTV30)
0.9V – 1V
Pk-Pk Pulses at
MP 73 (L2405)
Yes
No
No
No
SL 5 Replace
N2700
SL 4 Escalate
SL 5 Replace
N2288
SL 4 Escalate
SL 5 Replace
N2700
SL 4 Escalate
SL 5 Replace
X2405 or N2010
SL 4 Escalate
1228-1147 rev. 1
32 (129)
Page 33
System Connector Protection Test
g
g
g
Perform the Ohm measurements by using the DMM instrument (Fluke).
Note!
Note! Connect the Black probe to the X2405_PIN 9 (GND).
The Battery must be removed from the Phone during this test.
TROUBLESHOOTING System Conne ct or Prote ct i on Test
Current Consumption Test
Step 1:
Insert a Local SIM Card and use the phone with the Signalling SW (SSW).
Use Dummy Battery connected to Power Supply Channel 1 (VBATT).
Instrument settings: Voltage: 3.8 Volt, Limiter 3A.
Note! The Dummy Battery should have approximately 120K Ohm resistance between GND
and BDATA.
Measure the current consumption when Phone is turned off.
Take a note of the current consumption at Power Supply Channel 1 (VBATT).
The Current consumption in off mode should be less than 1mA.
If more than 1mA go to Dead Phone Problems part 1 TRS guide.
Step 2:
Turn the Phone On:
Measure the deep sleep current max 6mA typical between 0-3mA. Make sure that the
operator is running with deep sleep mode.
- Current Con su m pt io n Test
SEMC Troubleshooting Manual
C903
TROUBLESHOOTING
PIN_1 PIN_9 GND PIN_12
System Conn.
X2405
(PIN Position)
10L
20 L2406 if higher X2405 if higher
310k - 12k
40.9k – 1.1k
50.9k – 2.2k
60.9k – 2.2k
775V2430 if lower
8350k – 700k
9 0 Ohm GND R2449 if higher X2405 if higher
Ohm
Measurements
(Ohm)
SL 4
(Repair Action)
L2468
N2421 if lower
C2439 if lower
L2401 if higher
N3101 if lower or higher
L2402 if higher
N3101 if lower or higher
L2403 if higher
N3101 if lower or higher
L2404 if higher
N3101 if lower or hi
V2417 if lowe r
N2422 if lower or higher
her
(Repair Action)
X2405 if higher
X2405 if higher
X2405 if higher
X2405 if higher
X2405 if higher
L2405 if higher
N2700 if lower or hi
X2405 if higher
R2434 if higher
R2468 if hi
SL 5
X2405
C2462 if lower
C2463 if lower
C2448 if lower
C2447 if lower
C2445 if lower
C2444 if lower
her
her
Note! This operation can be switched off by operator if network is busy or heavily-loaded.
If phone using more than 6mA, then go to EMMA and run Software Update Contents Refresh
(SUCR SW).
Step 3 with Fault Trace SW application:
-Flash the phone with ETS SW
-Use Dummy Battery connected to the Power Supply Channel 1 (VBATT)
-Use Fault Trace SW
Connect the:
-Dummy Battery connected to the Power Supply Channel 1 (VBATT):
Instrument settings: Voltage: 3.8 Volt, Limiter 3 A
-Connect DCIO/SEPI to the phone:
Instrument settings: Voltage: 5 Volt, Limiter 2 A
Perform the following tests:
-Max TX Power GSM 850 MHz
Fault Trace SW settings:
TX and RX GSM
GSM Mode Settings:
TX Switched
GSM Radio Settings:
Select Band: GSM 850
Channel: 128
Power Level: 5
1035k – 0L
Z2400
V2421 if lowe r
N2420 if lower
X2405
R2445
C2461 if lower
Limits GSM 850 MHz
-Transmitter Current Limits: 300mA
-Tolerance: ±20%
11250k – 360k
1285k – 110k
Z2400 if higher
V2420 if lowe r
N2420 if lower or higher
R2490 if higher
V2412 if lowe r
V2202 if lowe r
C2440 if lower
X2405 if higher
R2446 if higher
C2460 if lower
C2441 if lower
1228-1147 rev. 1
33 (129)
Page 34
TROUBLESHOOTING
Current Cons um pt io n Test
SEMC Troubleshooting Manual
C903
-Max TX Power GSM 900 MHz
Fault Trace SW settings:
TX and RX GSM
GSM Mode Settings:
TX Switched
GSM Radio Settings:
Select Band: GSM 900
Channel: 1
Power Level: 5
Limits GSM 900 MHz
-Transmitter Current Limits: 200mA
-Tolerance: ±20%
-Max TX Power DCS 1800 MHz
Fault Trace SW settings:
TX and RX GSM
GSM Mode Settings:
TX Switched
GSM Radio Settings:
Select Band: DCS 1800
Channel: 512
Power Level: 0
Limits DCS 1800 MHz
-Transmitter Current Limits: 200mA
-Tolerance: ±20%
-Max TX Power PCS 1900 MHz
Fault Trace SW settings:
TX and RX GSM
GSM Mode Settings:
TX Switched
GSM Radio Settings:
Select Band: PCS 1900
Channel: 512
Power Level: 0
Limits PCS 1900 MHz
-Transmitter Current Limits: 160mA
-Tolerance: ±20%
-Max TX Power WCDMA BAND I
Note! Valid only for W995 with WCDMA BAND I support.
-Max TX Power WCDMA BAND II
Note! Valid only for W995 with WCDMA BAND II support.
Fault Trace SW settings:
TX and RX WCDMA
Radio Settings:
Select Band: BAND I
Fast Select Channels: Ch LOW
Modes: Max Pwr 23dBm
Limits WCDMA BAND I
-Transmitter Current Limits: 640mA
-Tolerance: ±20%
-Max TX Power WCDMA BAND V
Note! Valid only for W995 with WCDMA BAND V support.
Fault Trace SW settings:
TX and RX WCDMA
Radio Settings:
Select Band: BAND I
Fast Select Channels: Ch LOW
Modes: Max Pwr 23dBm
Limits WCDMA BAND I
-Transmitter current: 6 50mA
-Tolerance: ±20%
-Max TX Power WCDMA BAND VIII
Note! Valid only for the W995 with WCDMA BAND VIII support.
Fault Trace SW settings:
TX and RX WCDMA
Radio Settings:
Select Band: BAND I
Fast Select Channels: Ch LOW
Modes: Max Pwr 23dBm
Limits WCDMA BAND I
-Transmitte r current: 560mA
-Tolerance: ±20%
If the current consumption is out of the test limits then try to solve the problem by running
SERP Calibration.
If there are still problems with the current consumption then go to the following TRS guides:
TROUBLESHOOTING
Fault Trace SW settings:
TX and RX WCDMA
Radio Settings:
Select Band: BAND I
Fast Select Channels: Ch LOW
Modes: Max Pwr 23dBm
Limits WCDMA BAND I
-Transmitter Current Limits: 600mA
-Tolerance: ±20%
GSM Network problems,
WCDMA I, II, V Network Problems or
WC
DMA VIII Network Problems
If the current consumption is within the test limits then go to: Charging Test.
-Power Supply Channel 2 DCIO/SEPI: Instrument settings Voltage: 5V, Limiter: 2A
This test should be performed in 3 steps:
Step1:
Measure the voltage at the Backup Capacitor by using Fault Trace SW- Logic -
ADC Values – Read ADC Value (Reading 1).
Step2:
This step should be made 30 seconds after Step 1. Measure the voltage at the
Backup capacitor by using Fault Trace SW - Logic – ADC Values - ADC Channels
– Read ADC Value (Reading 2).
Step3:
Compare the difference between Reading 1 and Reading 2 with the reference table
below. If the Reading 1 value is between 50 and 680 go to Interval 1, if it is between
681 and 800 go to Interval 2, if it is between 801 and 880 go to Interval 3 and
compare with the Reading 2 – Reading 1 Min and Max Limits.
Reference Table:
Min MaxUnit
Absolute readout
Reading 1
50 880 Dec
Charging Test
To perform this test use:
-Phone with the Signalling SW (SSW)
-Dummy Battery connected to Power Supply Channel 1 (VBATT)
Note! The Dummy Battery should have approximately 120K Ohm resistance between GND and
BDATA.
- Power Supply Channel 1 (VBATT)
Instrument settings:
Voltage: from 3.0 Volt to 4.2 Volt, according to VBATT row in the Reference Table.
Limiter: 2A
-Power Supply Channel 2 (DCIO/SEPI)
Instrument settings:
Voltage: 5V
Limiter: 2A
Test instructions:
-Disconnect the DCIO/SEPI Cable between each measurement and wait for phone to shutdown before
changing VBATT voltage.
-Take a note of current measurements at Power Supply Channel 2 DCIO/SEPI and display charging
indicator X seconds after DCIO/SEPI cable has been inserted according to the Test Time row in the
reference table below.
-Compare the test results with the reference table below, tolerance +/-20%.
Reference Table
VBATT x
Volt 3.0v 3.1v 3.2v 3.3v 3.4v 3.5v 3.6v 3.7v 3.8v 3.9v 4.0v 4.1v 4.2v
Test Time
x sec. 15s 15s 15s 25s 25s 25s 35s 35s 35s 35s35s 25s 45s
DCIO/SEPI
Current
mA 250mA 250mA 250mA 500mA 600mA 700mA 900mA 900mA 900mA 900mA 900mA 900mA 0mA
Display
indicates
charging Nothing Nothing Nothing Yes Yes Yes Yes Yes Yes Yes Yes Yes
TROUBLESHOOTING
Fully
Charged
Reading 1 (Dec) Reading 2 – Reading 1 (Dec)
Min Max
Interval 1 (50 – 680) 20 210
Interval 2 (681 – 800)5 30
Interval 3 (801 – 880)0 10
Note! The upper table contains the absolute limits for the readouts. The lower table
contains the allowed delta between the first and the second readout, separated in
time with 30 seconds.
Note! If the readings are out of limits then SL 5 replace C2214 (Backup Capacitor)
if the problem persists then SL 5 Replace N2000 SL 4 Escalate.
Note! The Power Supply Channel 1 (VBATT) must allow reverse current.
If the charging current is NOT
equal to the reference table then go to: Charging Problems TRS Guide
If the charging current is equal to the reference table then insert the normal battery and test the charging
current to verify if the phone battery is working properly.
Measure the voltage at the battery to define the current level.
If the battery is receiving the right current, then the phone and the battery are working properly.
1228-1147 rev. 1
35 (129)
Page 36
ASIC Revision Test
Note! The Keypad Scan Test must be Deactivated during this test.
Purpose:
TROUBLESHOOTING ASIC Revision Test
SEMC Troubleshooting Manual
C903
-Verify that the ASICs are correctly mounted, that the communication works
and that the revisions are correct.
Note! The Network support depends on variant and market.
Features
Camera
5 megapixel camera
Auto Focus
Up to 16x digital zoom
Smart Contrast
Smile Shutter™
Face Detection
BestPic™
Photo Fix
Photo Flash
Picture and video blogging
Video Recording
Image and Video Stabilizer
Snapfish™
Music
Media player
Album art
Mega Bass™
PlayNow™
TrackID™
Bluetooth™ stereo (A2DP)
Music tones (MP3/AAC)
Web
Access NetFront™ Web browser
Web feeds
Photo feeds
Communication
Polyphonic ringtones
Speakerphone
Vibrating alert
Video calling (by main camera if no VGA camera)
Note! Video Calling support depends on variant and market.
Messaging
Email
Exchange ActiveSync®
Text messaging (SMS)
Picture messaging (MMS)
Chat View
Instant messaging
Predictive text input
Sound recorder
SEMC Troubleshooting Manual
C903
1228-1147 rev. 1
92 (129)
FUNCTIONAL OVERVI EW
Page 93
FUNCTIONAL OV ERVIE W
Technical Description
SEMC Troubleshooting Manual
C903
Design
Auto rotate
Picture wallpaper
Wallpaper animation
Entertainment
Media
3D games
Motion gaming (support)
Java
FM radio with RDS
Video streaming
Video viewing
Walk Mate
Tracker
TV-out
YouTube™
aGPS
Geotagging of photos
Google Maps™
Wayfinder Navigator (3-month trial version)
Connectivity
Bluetooth™ technology
Modem
Synchronization
USB mass storage
USB support
Hardware Overview
Platform Information
The C903 and C903a are using the U365 platform provided by Ericsson Mobile Platform
(EMP).
The U365 Platform Block Diagram Overview:
FUNCTIONAL OVERVI EW
1228-1147 rev. 1
93 (129)
Page 94
Baseband Part
FUNCTIONAL OV ERVIE W
Technical Description
SEMC Troubleshooting Manual
C903
Analog Baseband Controller N2000 (Vera)
This component is not replaceable on SL 4 because Baseband calibration is required. The
analog baseband controller is the main power management circuit. It has converters and
regulators that generate a number of supply voltages, each optimized for its load.
The analog baseband controller is a mixed digital and analog device that supports the
following circuitry:
• Power management circuitry
• Voltage regulation circuitry
• Eight Low Dropout (LDO) regulators and low power regulator
• 600 mA integrated Buck regulator
• Boost step-up DC/DC converter for White Light Emitting Diode (WLED) driving
• Battery charging and communication circuitry
• Battery fuel gauging circuitry
• Analog-to-Digital Converter (ADC)
• Digital-to-Analog Converter (DAC)
• SIM interfac e
• Six programmable LED drivers
• Accurate band gap reference
• Vibrator d river
• Real Time Clock (RTC)
• 8-byte One-Time Programmable (OTP) memory
• Pulse Code Modulation (PCM) voice coder/decoder
• PCM audio coder/decoder
• Microphone interface
• Stereo line input
• Earphone driver
• Earpiece driver
• 8-ƻ speaker driver / Stereo line output
The analog baseband controller is controlled by an I2C™ interface. It also comprises the
main power management circuits, equipped with a number of converters and regulators
for generating the required supply voltages.
The analog baseband controller supports the following features:
• Lithium batte ry
• Full audio CODEC functionality
• Supports stereo audio sampling rates of 8/16 kHz voice coding/decoding and 44.1/48
kHz for high quality audio recording/playback (for example MIDI and MP3 applications)
• Double CODEC I2S/PCM interfaces
• Flexible microphone interface
• Integrated headphone amplifiers
• Integrated earpiece amplifiers
• Integrated speaker amplifier
• Integrated flexible audio mixing functionality
• Boost driver capable of driving up to four WLEDs in series, supplying 50 mA
• Designed to meet power management demands of GSM and WCDMA
• Automated power management ADC to relieve CPU
• Battery identification and communication
• Single-terminal charger and accessory power interface for compact connector design
• Integrated USB charging
• OTP memory
• Integrated hardware fuel gauge to accurately monitor battery capacity
• Reduced number of external components as a result of integrated programmable LED
and vibrator drivers
• 32 kHz real time clock with alarm wake up capability
• Designed to support two host controllers.
Functional Blocks of the Analog Baseband Controller:
FUNCTIONAL OVERVI EW
1228-1147 rev. 1
94 (129)
Page 95
Connection Diagram of the Analog Baseband Controller:
FUNCTIONAL OV ERVIE W
Technical Description
Charger Control
A programmable charger is used for battery charging. Limits can be set for the output
voltage at CHSENSE- and the output current from DCIO through the sense resistor to
CHSENSE-. The programmable charger is enabled or disabled by the assertion/negation of
the external signal DCIO. Parts of the programmable charger are activated and
deactivated depending on the level of VBAT. The rest of the programmable charger is
activated and deactivated through I2C.
The programmable charger supports the following functions:
• Constant current charging
• Constant voltage charging
• Trickle charging
• PWM controlled charging
• Over-voltage and over current detection
• Watchdog termination
• DCIO assertion/removal detection
• Voltage and current measure functi ons
• Low resistive path (reverse mode)
The programmable charger is able to control the voltage and limit the current to a load
seen at CHSENSE-. The programmable charger can also be run in PWM mode to turn the
charging on and off in accordance with the particular period and duty cycle. When the
charging is on, it is set to the current and voltage selected by I2C.
A low resistive path from VBAT to DCIO can be formed when DCIO is not detected. When
this setting is done in the appropriate registers, a lowering of CHREG to 0 V turns on the
external pass device. The pass device is automatically turned off whe n an external source
is detected on DCIO, or when the watchdog termination block times out. The watchdog
termination block must be active when the external switch is enabled, both in normal
charging mode and in the low resistive path mode. The watchdog is set through the serial
interface, and if it has not been set again before timeout, the watchdog turns off the
external switch. The watchdog is disregarded during trickle charging. When no battery is
present, the system can be booted and supplied from DCIO by
applying the correct voltage on DCIO.
USB Charger
The analog baseband controller contains a standalone USB charger.
The USB charger has a separate input and incorporates full functionality during low VBAT.
The programmable charger supports the following functions:
• Trickle charging
• Constant current charging
• Watchdog termination
• Trickle LED indication
• VBUS assertion/removal detection
SEMC Troubleshooting Manual
C903
FUNCTIONAL OVERVI EW
1228-1147 rev. 1
95 (129)
Page 96
FUNCTIONAL OV ERVIE W
Technical Description
SEMC Troubleshooting Manual
C903
Resistance Identification and Temperature Measurement
The resistance identification mode utilizes the constant current source to feed the battery
data output while monitoring the voltage at the battery data node with general purpose
ADC the conversion is started through I2C.
Resistance Identification (A) and Temperature Measurement (B):
SIM Interface
The SIM interface supplies level is shifting between the digital baseband controller and the
SIM/USIM card. Moreover, hard-wired SIM deactivation functionality manages removal of
a SIM card that has not been powered down.
Block Diagram of the SIM Interface:
CODEC Overview
The CODEC is encoding analog audio signals and analog voice signals into digital signals
using Analog to Digital converters (ADCs). This is done in the coder section of the CODEC,
also named the TX path (transfer section). The CODEC is also decoding digital audio
signals and digital voice signals into analog signals using DACs. This is done in the
decoder section of the CODEC, also named the RX path (receiver section).
CODEC Block Schematic:
FUNCTIONAL OVERVI EW
1228-1147 rev. 1
96 (129)
Page 97
FUNCTIONAL OV ERVIE W
Technical Description
SEMC Troubleshooting Manual
C903
CODEC CCO Voltage Source
There is an internal voltage source CCO that provides the necessary drive current for
electret microphones. The voltage source is I²C programmable to 2.2 V or 2.4 V. The
source can be disabled during standby. A typical use case with a microphone connected to
MIC1 and the CCO is shown in picture below.
Digital Baseband Controller (CPU)
N2010 (Kajsa)
This component is not replaceable on SL 4 because Baseband calibration is required.
The Digital Baseband Controller is divided in two subsystems: Access and Application
Access Subsystem
All modem functionality in the digital baseband controller resides in the Access subsystem.
This includes EDGE/GPRS/GSM interface, WCDMA interface, USB, IrDA, and other
peripheral modules. The control CPU is an ARM926 and a DSP is used for signal processing
and layer one control code.
The main communication between the blocks in the Acce ss subsystem is done through the
Advanced High-performance Bus (AHB) matrix, which is a set of control buses connecting
the different parts together. A block called Syscon is responsible f or distributi ng clocks and
resets to all parts of the Access subsystem. This block is under SW control. The Access
subsystem is connected to the Shared EMIF, an interface for communication with an
external SDRAM. The Shared EMIF is shared between the Access subsystem and the
Application subsystem.
Access Subsystem of the Digital Baseband Controller:
Earphone Amplifier
The earphone amplifiers (BEARP and BEARN) are mainly intended to be differentially
configured and drive a low impedance dynamic transducer (earpiece) but they can also be
single ended configured. The BEARP and BEARN amplifiers can be powered down by the
I2C. The amplifiers can exhibit high impedance to 1.4V or low impedance to ground when
powered-down. Fifty-one gains are available for BEARP and BEARN: from +15dB down to
–60dB in 1.5dB steps. When the BEARP and BEARN outputs are operating in differential
mode, an I²C selectable bit must invert one of the inputs.
Speaker Amplifier
The speaker amplifiers, SPKRP and SPKRN, are intended to drive a low impedance (8ƻ)
speaker in a differential mode or to be used as a stereo configured line output amplifier
supporting external high power amplifiers. The output buffer shall exhibit low impedance
to ground when powered-down and the current consumption shall be minimal. When the
SPKRP and SPKRN outputs are operating in differential mode, an I²C selectable bit must
invert one of the inputs.
FUNCTIONAL OVERVI EW
1228-1147 rev. 1
97 (129)
Page 98
FUNCTIONAL OV ERVIE W
Technical Description
SEMC Troubleshooting Manual
C903
Application Subsystem
The Application subsystem contains functionality related to functions such as MMI,
graphics, audio and memory media. The control CPU is an ARM926 with three external
memory interfaces, one shared with the Access subsystem and two dedicated for the
Application subsystem. The Application subsystem contains several blocks. The main
communication between the blocks is done through the Advanced High performance bus
(AHB) matrix, whi ch is a se t of contr ol bu ses con nectin g the di fferen t parts. A block ca lled
Syscon is responsible for distributing clocks and resets to all parts of the Application
subsystem. This block is under SW control. The Application subsystem is connected to the
Shared EMIF that is used for code execution or data storage. In addition, a dedicated EMIF
that support SDRAM or static memory like NOR, PsRAM or NAND are also available. The
Application EMIF is a general interface for communication with, for example external
SDRAM, PSRAM, NOR flash, NAND flash and companion chips
Application Subsystem of the Digital Baseband Controller:
The functional blocks of the Digital Baseband Controller:
FUNCTIONAL OVERVI EW
Keypad
The keypad interface block supports up to 30 keys with 65 columns and 6 rows and
operates in both scan and idle mode. The keypad scan is performed by software. Any
transition in the state of the column inputs is written directly to the register. The keypad
interface differentiates between single key presses, simultaneous presses of any keys with
a function key, and any key releases. The period between successive scans is
programmable over the range 5 ms to 80 ms, in 5 ms steps. During scan mode, the
keypad generates an interrupt whenever a valid keypad state change occurs (including a
release of any pressed keys). The scan function is disabled during system power-up. The
keypad is able to detect at least four simultaneous key presses. Not all combinations are
supported.
1228-1147 rev. 1
98 (129)
Page 99
FUNCTIONAL OV ERVIE W
Radio Part
Antenna
The mobile system antenna interface connects the Wideband Code Division Multiple
Access (WCDMA) and Global System for Mobile Communication (GSM) input/output to
the antenna of the Mobile Phone. It is a bi-directional RF interface containing signals in the
range 800 MHz to 2.2 GHz. The mobile system antenna interface is the interface between
the Mobile Phone Radio Frequency (RF) input/output and the mobile system antenna. The
interface handles the GSM 850, EGSM 900, GSM 1800, GSM 1900 and WCDMA Band I, II
and V, RF inputs/outputs.
Mobile System Antenna Interface :
Radio Module N1200 (Tiger)
Front End
The Front End block connects the proper block in the radio system to the antenna. The
Front End has two inputs for EDGE/GSM/GPRS, one for low band (850/900 MHz) and one
for high band (1800/1900 MHz). The EDGE/GSM/GPRS power amplifier output is filtered
by the low pass filter in the Front End and then connected to the antenna through a switch.
In receive mo de, th e EDGE/GS M/GPR S sign al fro m the an tenna passe s thro ugh the switch
to one of the four receive SAW filters. The SAW filte r provides receive band selectiv ity. In
GSM/GRPS/EDGE systems, transmit and receive operations are divided in time and the
switch connects the proper block in accordance with the mode of operation (that is,
transmit or receive; one at a time).
In WCDMA the transmit outputs from the WCDMA transceiver are filtered by an external
SAW filter that cleans up the spectrum. The SAW filter output is connected to the power
amplifier, one for each band. For power control, a sample of the transmit output is taken
by a directional coupler and converted to a DC level by the power detection circuit. This
signal is used to control the transmitter output power. The transmit sign al passes through
an isolator and then a duplexer. The duplexer output is selected by the switch in the Front
End for connection to the antenna. In WCDMA receive mode the signal from the antenna is
switched by the Front End to the correct duplexer. The output from the duplexer is
connected to the LNA input in the WCDMA receiver.
Transceiver
The transceiver is a multi-mode transceiver for WCDMA/EGDE/GPRS/GSM. The
EDGE/GPRS/GSM part of the transceiver use a digital baseband interface that is shared
between received and transmitted data. The receive interface is based on I and Q data
and the transmitter interface is based on envelope and frequency data. The WCDMA part
of the transceiver use differential analog in-phase and quadrature-phase interfaces, which
is an IQ-interface, in the receiver and the transmitter data paths.
Technical Description
Frequency Generation
The 26 MHz reference signal is used as the reference for the on-chip synthesizers. To
cover the required frequency range, the integrated Voltage Controlled Oscillator (VCO)
operates at twice the frequency for band 1800/1900/2100, and at four times the desired
frequency for band 800/900. The two synthesizers are controlled through the serial bus
from the access side of the digital baseband controller.
EDGE/GPRS/GSM Transmitter Part
Polar modulation transmitter architecture based on the direct phase/frequency
modulation/synthesizer architecture is implemented for GSM, GPRS and EDGE. This
architecture has the capability of generating both the GSM/GPRS constant envelope GMSK
modulation and the linear EDGE 8-PSK modulation in a very cost efficient way. The
motivation for a polar modulation transmitter architecture compared to traditionally linear
architectures is to reduce the output noise (thus eliminating the need for off-chip filters)
reduce the power consumption by utilizing non-linear switching analog signal processing
blocks, and to eliminate the need for an RF isolator.
In brief, the phase/frequency modulator in this polar modulation architecture is a sigmadelta controlled fractional-N frequency synthesizer with an additional frequency insertion
point after the loop filter at the input of the VCO. The Phase-locked Loop (PLL) has two
information inputs: the divider ratio in the feedback path and a direct path to the VCO.
The phase locked loop generates the radio frequency carrier including the phase
modulation information at the desired channel frequency.
WCDMA Transmitter Part
The WCDMA transmitter architecture is an on frequency linear direct up-conversion IQmodulator. The in-phase and quadrature-phase reconstruction filters are fully integrated
and a programmable gain amplifier implements the gain control. An external SAW filter
between the WCDMA circuit and the power amplifier is used to improve noise performance.
After the power amplifier, the signal is sent through an isolator and through the duplex
filter, which directs the transmit signal to the antenna connector through the antenna
switch. The supply voltage and bias of the power amplifier are adapted depending on the
output power to achieve high efficiency at every transmitter power level. A high efficiency
DC/DC converter regulates the supply voltage and the bias operation point is controlled by
a D/A-converter in the WCDMA radio circuit.
Receiver Part
The receiver architecture is a direct down-conversion zero-IF receiver with integrated lowpass filters. The complete receiver with seven Low Noise Amplifiers (LNAs), one for each
supported band, is integrated on chip. After the down-conversion, the in-phase and
quadrature-phase components are low pass filtered and if the receiver is in
EDGE/GPRS/GSM mode the signals are fed to the integrated high dynamic range sigmadelta A/D-converters.
SEMC Troubleshooting Manual
C903
FUNCTIONAL OVERVI EW
1228-1147 rev. 1
99 (129)
Page 100
Ericsson RF 3300 Block Diagram:
FUNCTIONAL OV ERVIE W
Technical Description
RF System Control
The access side of the digital baseband controller controls the overall radio system.
In both EDGE/GSM/GPRS and WCDMA air interface mode, the digital base band controller
controls the ra dio system th rough a three-wire serial bus. The d igital baseb and controller
also manages PA band control and the antenna switch mechanism in the front end module.
The 26 MHz VCXO clock residing in the transceiver is turned on only when required and
initiated by the digital baseband controller.
The control flow for the RF system:
SEMC Troubleshooting Manual
C903
EDGE/GPRS/GSM
TX Frequency, Channel and Power Level Range:
GSM 850:
TX Frequency Range: 824,2 MHZ – 848,8 MHZ
Channel Range TX: 128 – 251
Power Level: Min 19 – Max 5
GSM 900:
TX Frequency Range: 890,2 MHZ – 914,8 MHZ
Channel Range TX: 1 - 124
Power Level: Min 19 – Max 5
EGSM 900:
TX Frequency Range: 880,2 MHZ – 889,8 MHZ
Channel Range TX: 975 - 1023
Power Level: Min 19 – Max 5
DCS 1800:
TX Frequency Range: 1710,2 MHZ – 1784,8 MHZ
Channel Range TX: 512 – 885
Power Level: Min 15 – Max 0
PCS 1900:
TX Frequency Range: 1850,2 MHZ – 1909,8 MHZ
Channel Range TX: 512 - 810
Power Level: Min 15 – Max 0
RX Frequency and Channel Range:
GSM 850:
RX Frequency Range: 869,2 MHZ – 893,8 MHZ
Channel Range RX: 128 – 251
GSM 900:
Frequency Range: 935,2 MHZ – 959,8 MHZ
Channel Range RX: 1 - 124
1228-1147 rev. 1
100 (129)
FUNCTIONAL OVERVI EW
Loading...
+ hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.