Samsung SGH-Z500 Anycall Service Manual page 35

7 . S G H - Z5 0 0 Fl o w
1. Power On
' Power O n ' does not work
Check the Battery Voltage
is more than 3.3V
U401PIN57(PS_HOLD)
= 2.6V?
Check the Clock at
O SC401=32KHZ
C430(VREG_MSMC) =
1.375V?
C429(VREG_MSME) = 1.8V?
C425(VREG _MSMP) = 2.8V?
C423(VREG_MSMA) = 2.8V?
C414(VREG_TCXO) = 2.8V?
Check for the clock at
C670= 19.2MHz
Check the initial operation
END
C h a r t o f Tr o u b le s h o o t in g
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
No
Change the Battery
No
Check the PMIC related to PS_HOLD
No
Resolder OSC401
No
Check the PMIC
No
Check the PMIC
No
Check the clock generation circuit
(related to OSC202)
7- 1