LG VX9100 Service Manual page 90

VX9100
Copyright © 2007 LG Electronics. Inc. All right reserved
Only for training and service purposes
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Check battery voltage > 3.4V
YES
Check the VPWR voltage > 3.4V
YES
Check the voltage of
the following port at U401
+1.275V_MSMC
+1.85V_MSMP1
+2.6V_MSMP2
+2.6V_MSMA
+2.85V_TCXO
YES
Is the frequency of TCXO (U107)
19.2Mhz?
YES
download software
try again
Logic level at PS_HOLD
Of U401=High?
YES
Change the board
Checking Flow
Checking Flow
Charge of Change Battery and try again
NO
NO
NO
NO
NO
- 89 -
Confirm +VBATT Line
Replace PMIC (U401)
Check VPWR Voltage >3.4V
Replace TCXO (U107)
Replace MSM (U202)
Does it work properly?
NO
Change the board
LGE Internal Use Only