Logic; Power Switch On - Samsung GT-S5570 Service Manual

8-3. LOGIC

8-3-1. Power On

Power switch on

Check the current
consumption
>= 100mA?
Check the battery
voltage >= 3.45?
Check the TP_PS_H
OLD pin PS_HOLD
= 2.6V?
Check the clock at
OSC400 = 32KHz ?
C440(VREG_MSMC1)=1.2V?
C439(VREG_MSMC2)=1.2V?
C438(VREG_MSME)=1.8V?
C410(VREG_MSMP)=2.6V?
C411(VREG_MSMA)=2.6V?
Check the clock
C110 = 19.2Mhz ?
Check the UCP300
Change the main PBA
NG
Yes
Yes
Yes
Yes
Yes
Yes
Yes
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NO
NO
Change the battery
NO
related to PS_HOLD
NO
NO
NO
Check the clock generation circuit
NO
Resolder or replace UCP300
8-3
Level 3 Repair
Download
Check the PMIC
Resolder OSC400
Check the U615
( change U615)