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9-1-2. Initial
Initial Failure
check the pin
RSTB of UCP201
is LOW?
check the pin CKI
of UCP201 is
13Mhz?
Check the clock signal
at pin #3 of OSC100
Freq=26Mhz?
Check the pin #9 of U101
is HIGH and pin #11,
#13 is 2.9V?
Check the Initial Operation
END
Yes
Yes
Yes
Yes
Yes
No
Check UCP201
Check
No
R101, C105
No
check
No
Check U101
9-3
Flow Chart of Troubleshooting
1
2
3
OSC100
4
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