Sony Ericsson K850, Troubleshooting Manual

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K850
1203-2528 rev. 1
ABOUT
AB
O
U
T
ABOUT
General information
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 noti
fi 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 con fi dential and should be treated as con fi 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.
Rev. Date Changes / Comments
1 2/14/2008 Initital revision.
Revision History
Con tents
ABOUT 2
Contents 2
TROUBLESHOOTING 3
Equipment List 3
On/Off Problems 8
Flash Problems 8
Dead Phone Problems 9
Display Problems 9
Display Illumination Problems 10
Key Problems 10
LED Problems 11
Main Camera Problems 11
VGA Camera Problems 12
Camera Door Problems 12
Vibrator Problems 13
Charging Problems 13
USB/VBUS Charging Problems 14
SIM Problems 14
Memory Stick Problems 15
Audio Internal Problems 15
Audio External Problems 16
FM Radio Problems 16
Bluetooth Problems 17
GSM Network Problems 18
WCDMA Network Problems 18
Xenon Flash Problems 19
System Connector Protection Test 20
Current Comsumption Test 20
Battery & Current Calibration Test 22
Backup Capacitor Test 22
Test Charging 23
ASIC Revision Test 23
Reference Measurement Points 24
TEST POINTS 25
Front Side 25
Back Side 26
SIM & Memory Card Holder 27
So fi a Top Schematic 28
Application & System Performance Top 29
System Top 30
System Control - Clocks & Resets 31
System Memories 32
Power Top 33
Power Regulators & Charging 34
Power Camera 35
Power ASICs 36
Power Memories 37
Connectivity Top 38
Connectivity ADC & I2C 39
Connectivity Cards 40
Connectivity Connectivity 41
Connectivity Keypad 42
Connectivity Camera Door & Flash 43
Access Top 44
Access - GSM & UMTS 45
Access - Bluetooth 46
Imaging Top 47
Imaging Display 48
Imaging Camera 49
Imaging LMU 50
Audio Top 51
Audio Analog 52
Audio Digital 53
FM Radio 54
Test 55
Thor RF Module Top 56
Thor RF Module GSM/EDGE Tx + FEM 57
Thor RF Module GSM/EDGE Rx + Synth 58
COMPONENT OVERVIEW 59
Front Side B - X 59
Back Side C - E 60
Back Side L - Z 61
FUNCTIONAL OVERVIEW 62
Technical Description 62
Block Diagram Access 71
Block Diagram Application 72
Power Distribution & Clocking Concept 73
APPENDIX 74
Replaceable Parts 74
Components B2101 - D2000 75
Components D2010 - D2105 - D2404 76
Components D2420 - D2460 77
Components L2200 - L2401-04 - N1200 78
Components N1210 - N1400 79
Components N2000 - N2201 80
Components N2202 - N2203 81
Components N2205 - N2208 82
Components N2400 - N2402 - N2500 83
Components N2525 - N3100 - N3101 84
Components N4101 - N4200 85
Components S2400 - S2402 - S2403 86
Components V2202 - V2402 - V2405 86
Components V2420-21 - V2425 - V2428 87
Components V2477-78 - V2500 87
Components X1200 - X1201-03 - X2200 88
Components X2409 - X4300 - X2410 89
Components X2511 - X3105 89
Components X4301 90
Camera Module 5 MPixel 90
VGA Camera 90
Xenon Flash Assembly 91
Display 91
Keyboard Schematics 92
Troubleshooting Software Documentation 93
Troubleshooting Fixture Setup Guide 100
SEMC Troubleshooting Manual
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