Samsung Electronics
4-3
Troubleshooting
Check power at the BATTERY
(single part).
Recheck after replacing the battery.
4
Check power.
L301: 1.1V(CPU Core)
L302: 3.0V(MAIN)
No
No
1
Check the power terminal connection
(Battery, Adapter)
Check MAIN 12Mhz clock
No
Defective
Yes
Yes
No
Yes
A
Refer to wave pattern
image of Fig. 4-1.
Completion
3
Check 7WH74_IC301 the
DODC_EN is ‘HIGH’.
2
When power Key is on,
check key signal as ‘HIGH’?
Refer to wave pattern
image of Fig. 4-1.
Yes
Yes
No
Refer to wave pattern
image of Fig. 4-1.
Summary of Contents for YEPP YP-Q1
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