7. Lock Signal Fail : Flow chart
Lock Signal Fail
Check cable input
has right signal
Check U32 pin4.6.11.12
Have correct voltage
Replace U11
Replace
U32
Chack the signal source
Check J21 pin14 voltage
is correct or not
Send back to
zinwell
Send back tozinwell
Send back to zinwell
Yes
Yes
Yes
No
No
No
Check U32 pin15.23.28
Have correct voltage
Check U31 pin2(5v)
voltage is correct or not
Check U29 pin2(1.8v)
voltage is correct or not
Check U28 pin2(3.3v)
voltage is correct or not
Check U31 pin2(5v)
voltage is correct or not
Check U29 pin2(1.8v)
voltage is correct or not
Check U28 pin2(3.3v)
voltage is correct or not
Replace U11
Replace U11
Yes
Yes
Yes
Yes
Send back
To zinwell
Send back
to zinwell
Send back
to zinwell
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
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