SAMSUNG Proprietary-Contents may change without notice
10. Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
10-
1
10-1. Power On
C423(VREG_MSME)=1.8V?
C421(VREG_MSMP)=2.6V?
C420(VREG_MSMA)=2.6V?
C425(VREG_TCXO)=2.8V?
Yes
Check the initial operation
Yes
No
Check the clock generation circuit
(related to TCX100)
Check for the clock at
= 19.2MHz
Yes
No
Check the U400
Yes
END
Yes
No
Check the U400
L400(VREG_MSMC)=1.37V?
Yes
No
Resolder OSC400
Check the Clock at
OSC400=32.768KHz
Yes
No
Check the U400 related to PS_HOLD
U400 pin F10(PS_HOLD)
= 2.6V?
Yes
No
Change the Battery
' Power On ' does not work
Check the Battery Voltage
is more than 3.4V
Содержание SGH-L770V
Страница 74: ...8 Block Diagrams 8 1 8 1 RF Block Diagram ...
Страница 75: ...9 PCB Diagrams 9 1 1 Main top ...
Страница 76: ...PCB Diagrams 9 2 2 Main bottom ...
Страница 93: ...www s manuals com ...