Flow Chart Of Troubleshooting - Samsung SGH-D600 Service Manual

7. Flow Chart of Troubleshooting

7-1. Power On
' Power On ' does not work
Check the Battery Voltage
is more than 3.4V
C408(VINT) = 2.7V ?
Check the Clock at
R404= 3 2KHz
C424, C425 = " H " ?
C424(VDD_IO_HIGH : 2.9V)
C425 (VDD_IO_LOW :1.8V)
C402(VDD_GSM_CORE)
= 1.875V?
Check for the clock at C116
= 26MHz
Check the initial operation
END
Y e s
Y e s
Y e s
Y e s
Y e s
Y e s
Y e s
Y e s
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung ' s authorization
No
Change the Battery
No
Check the PMU related to VINT
No
Resolder OSC400
No
Check the related citcuit
No
Check the VDD_GSM_CORE circuit
No
Check the clock generation circuit
(related to U100)
7- 1