Flow Chart Of Troubleshooting; Power On - Samsung SGH-Z310 Service Manual

Flow Chart of Troubleshooting

9.

9-1. Power On

' Power On ' does not work
Check the Battery Voltage
is more than 3.4V
U201PIN57(PS_HOLD)
= 2.6V?
Check the Clock at
OSC600=32KHZ
C628(VREG_MSMC) =1.375V?
C626(VREG_MSME) = 1.8V?
C622(VREG_MSMP) = 2.6V?
C620(VREG_MSMA) = 2.6V?
Check for the clock at
C223= 19.2 MHz
Check the initial operation
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
END
No
Change the Battery
No
Check the PMU related to PS_HOLD
No
Resolder X1
No
Check the PMIC
No
Check the PMIC
No
Check the clock generation circuit
(TCXO200)
9-1