Samsung GT-B5510 Service Manual page 33

Level 3 Repair
8-3. LOGIC
8-3-1. Power On
Power switch on
Check the current
consumption
>= 100mA?
Check the battery
voltage
>= 3.8?
Check the clock at
OSC400 =32KHz?
L400(VCORE_1.2V)=1.2V?
L401(VMEM_1.8V)=1.8V?
Check the clock
OSC100 = 26Mhz ?
Check the initial operation
NG
Yes
Yes
Yes
Yes
Yes
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NO
NO
Change the battery
NO
NO
NO
Check the clock generation circuit
8-4
Download
Resolder OSC400
Check the U402