Acroprint ATR120 Service Manual page 47

E-38
Remove the front case.
Connect AC cable.
Insert card try to print the time.
CR motor run?
Yes
Connector LCN9 Connected?
No
Connected LCN9 securely,
Execute functional test to check operation.
E-30
Some defects in CR
Mechanism?
No
Connector LCN3 Connected?
No
Connected LCN9 securely,
Execute functional test to check operation.
CR motor or CR encoder is defective.
No
See "5-3 Motor Operation Failure"
Yes
Main Control PCB Ass'y is defective.
CR encoder sensors are defective.
CR encoder sensor circuit are defective.
CPU is soldered incorrectly.
The print head fails to return to the home position.
Yes Correct defects in mechanism
Yes
Main Control PCB Ass'y is defective.
HP sensors are defective.
HP sensor circuit are defective.
CPU is soldered incorrectly.