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