Troubleshooting
SECTION 06 Troubleshooting
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Replacing a potentiometer
The break-off point adjustment potentiometers are located on the piezo board.
■ Tools:
1.5 mm Allen wrench; 2.5 mm flat-bladed screwdriver; 7 mm box wrench; 4 mm box
wrench; tweezers.
CAUTION:
Perform a "Partial drain" then stop the printer and unplug it from the AC
outlet.
Place the head higher than the ink circuit.
Perform this entire operation in a dust-free environment.
Residual ink or additive may pour out, take appropriate precautions.
■ Disassembly:
□ Disassemble the rear head cover.
□ Disassemble the 4 solenoid valve block. Take care with the seals (one rectangular 3-
hole gasket, one square 4-hole gasket)
□ Unscrew the two screws from the ADP board and withdraw it from its housing without
disconnecting it.
□ Unscrew the two screws from the "contacts" board of the 4 solenoid valve block and
withdraw it without disconnecting it.
□ Unscrew the two screws from the 4 solenoid valve block bracket. Note that the two
screws are not identical. Carefully note where the wires and hoses pass. Disconnect
the intake hose from the recovery solenoid valve. Withdraw the bracket without
disconnecting the hoses. Take care with the seals (two O-rings).
