Flow Chart Of Troubleshooting; Power On - Samsung SGH-Z360 Service Manual

9. Flow Chart of Troubleshooting

9-1. Power On

' Power On ' does not work
Check the Battery Voltage
U501 PIN57(PS_HOLD)
OSC500=32.768KHZ
L502(VREG_MSMC) =1.375V?
L503(VREG_MSME) = 1.8V?
C517(VREG_MSMP) = 2.6V?
C519(VREG_MSMA) = 2.6V?
C528(VREG_TCXO) = 2.8V?
Check for the clock at
Check the initial operation
Yes
is more than 3.4V
Yes
= 2.6V?
Yes
Check the Clock at
Yes
Yes
Yes
C507= 19.2 MHz
Yes
Yes
END
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No
Change the Battery
No
Check the PMU related to PS_HOLD
No
Resolder OSC500
No
Check the PMIC
No
Check the PMIC
No
Check the clock generation circuit
9-1
(OSC200)