Epson Perfection 4870 Photo - Page 36

Perfection 4870 Photo Revision A
TROUBLESHOOTING Troubleshooting 36
Figure 3-9. The LED of the TPU does not light up.
Is the TPU
Harness connected
to the TPU Main
Board and TPU
Carriage?
Is the
Connector CN2
connected to the
TPU Main
Board?
Are the
Connectors
CN2, CN3 on the
TPU Inverter Board
connected?
Start
Connect the TPU
Harness.
Connect the
Connector.
Connect the
Connectors.
Replace the
SUB_C, D Board