Sony Ericsson K850 Troubleshooting Manual

4/000 21-1/FEA 209 544/131 A Company Internal © Sony Ericsson Mobile Communications AB Trouble Shooting Guide, Mechanical Applicable for K850 Contents 1 General ...............................................................................................................2 1.1 Service functions in the software............. ...

4/000 21-1/FEA 209 544/131 A Company Internal © Sony Ericsson Mobile Communications AB 2(28) 1 General This document outlines the mechanical repairs that should be made in an attempt to fix the common failures that are seen in the field. To gain a complete understanding of how to test and repair a specific failure, this d ...

4/000 21-1/FEA 209 544/131 A Company Internal © Sony Ericsson Mobile Communications AB 3(28) 1.2 Misuse and other no warranty issues Misuse is not covered by warranty. This chapter will explain what’s not covered by warranty. Phones that have been exposed to misuse will not be covered by warranty. This means: if it is p ...

4/000 21-1/FEA 209 544/131 A Company Internal © Sony Ericsson Mobile Communications AB 4(28) Corrosion components on the PCB. Corrosion components on the PCB. SIM reader damaged by liquid. System connector damaged by liquid Components around system connector damaged by liquid System connector pad(s) damaged by liquid ...

4/000 21-1/FEA 209 544/131 A Company Internal © Sony Ericsson Mobile Communications AB 5(28) 1.2.2 Liquid damage sticker In the phone there is placed a sticker that can give you a hint to see if the phone is damage by liquid or not. This sticker is located near the SIM reader (Fig. 1.2.1) and it is possible to see it witho ...

4/000 21-1/FEA 209 544/131 A Company Internal © Sony Ericsson Mobile Communications AB 6(28) 1.2.3 Action Make a general visual inspection for misuse, corrosion or oxidation from liquid damage. No further action should be taken for a liquid damaged phone. Handle the unit according to local directives. ...

4/000 21-1/FEA 209 544/131 A Company Internal © Sony Ericsson Mobile Communications AB 7(28) 2 Appearance Problems Problem Area Items to Check Repair Action Reference Image Visually inspect the cosmetic quality of all user viewable surfaces • If dirty – Clean parts as necessary. • If unacceptably scratched or damaged ...

4/000 21-1/FEA 209 544/131 A Company Internal © Sony Ericsson Mobile Communications AB 8(28) 3 Network/Signal Problems Problem Area Items to Check Repair Action Reference Image Before proceeding ! • Do software update content refresh. Note: this problem will not be solved by a regular software update. Visually inspect SI ...

4/000 21-1/FEA 209 544/131 A Company Internal © Sony Ericsson Mobile Communications AB 9(28) Problem Area Items to Check Repair Action Reference Image Visually inspect the Antenna Connector • If dirty or oxidized – Clean it. • If damaged – Handle the unit according to local directives. If the issue has not been res ...

4/000 21-1/FEA 209 544/131 A Company Internal © Sony Ericsson Mobile Communications AB 10(28) 4 On/Off Problems Problem Area Items to Check Repair Action Reference Image Check whether the phone vibrates 10 to 15 seconds after pressing the power key and whether the keypad illuminates. • If activation of the vibrator or ke ...