LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
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BB Trouble Shooting
4.7 Power on trouble
Power on sequence of KS10 is :
PWR key press
→
KEY_ON_SW_N go to low (D405, PM6650-1M KPDPWR_N pin#24)
→
PM6650-
1M Power Up
→
VREG_MSMC_1.375V(C735), VREG_MSME_1.8V(C736),
VREG_MSMP_2.7V(C730), VREG_MSMA_2.6V(C726), VREG_TCXO_2.85V(C710) power up
→
PON_RESET_N assert to MSM and PON assert to STn8810
→
VDD_IO_2.7V(C304),
VDD_IO_1.8V(C311),AP_VCORE(C314),AP_VPLL(C328),AP_VFUSE(C329) power up -> CPU and
Phone booting & PS_HOLD(D700) assert High to PMIC(PM6650-1M)
Start
Battery voltg. higher
than 3.22V?
Press PWR key
Keypad LED on?
VA100 high to low
when key press?
Is clock ok?
X100 : 19.2M
X600 : 32.768Khz
Change the Main board
Change or charging the
Battery
Follow the LED trouble
shoot
Check open Pattern
of power button
Change the Main board
Check the TXCO
NO
YES
YES
YES
YES
YES
NO
NO
NO
NO
Содержание KS10
Страница 1: ...Date July 2007 Issue 1 0 Service Manual Model KS10 Service Manual KS10 Internal Use Only ...
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