Flow Chart Of Troubleshooting - Samsung GT-E2121B Service Manual

9. Flow Chart of Troubleshooting

9-1. Power On
'POWER ON' does not work
Yes
Check battery voltage
is higher than 3.3V
OK
Check VPERM_3.0V,
VANA_2.85V, VRF_2.85V,
VSIM_3.0V, VMEM_1.8V,
VGPIO_2.8V of UCP201
OK
Check the pin 1 of
OSC201 produces clock
signal
OK
Check the L118
concerning about Jig
Power on
OK
Is Power On working?
Yes
END
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Not OK
Not OK
Not OK
Not OK
No
9-1
Change battery
Check the UCP201
Solder OSC201 again
Solder L118 again
Repeat sequence