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Flow Chart of Troubleshooting
9-3
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z
PHONE Part
NG
YES
NO
YES
NO
YES
NO
YES
1PIN in
U301 HIGH?
PHONE ON
Output
PWR
In U302 OK?
1pin in
U204 LOW?
6pin in
U204 LOW?
Check UME200
& Neighboring
Circuit
Check U302 &
Neighboring
Circuits
Chcek UCP700
& TCX100
Neighboring
Check 6 pin
Q302
Check U204