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Level 3 Repair
8-3. Flow Chart of Troubleshooting
8-3-1. Power On
Power on does not work
Check the current consumption
more than 100mA
USB_VBUS_5V
(TP: C605, C606)
BAT_FET_N = 0V
(TP: Pin 2)
VREG_MSMC1_1.2V
(TP: C449, D400)
VREG_MSMC2_ADSP_1.2V = 1.2V?
(TP: C444, C450, L402)
VREG_MSME_1.8V = 1.8V?
(TP: C445, L403)
VREG_MSMP_2.6V = 2.6V?
(TP: C435)
VREG_MSMA_2.6V = 2.6V?
(TP: C434)
Check the 19.2Mhz Clock at C2
09, C424. Is it around 19.2Mhz?
Check the PON_RESET_N = 2.6V?
(TP: TP_PON_RESET_N_PMIC)
Check the PS_HOLD = 2.6V?
(TP: TP_PS_HOLD)
YES
YES
4.5V
YES
YES
3V?
YES
YES
YES
END
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
Yes
Download again
NO
Check the IFC600
usb connector inserted correctly?
Resolder or change the U601
NO
Re-solder or change the TR400
NO
Change PBA
NO
Check the OSC100 or related circuit
NO
Change PBA
8-6
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