Repairing Method When The Circulation Route Is Dry Or Sticks - Hitachi IJ PH Service Manual

4.12 Repairing Method When the Circulation Route Is Dry or Sticks

4.12.1 Cleaning method for the solenoid valve
1 Remove the sticking solenoid valve.
(Refer to "4.6 Solenoid Valves Replacement Procedure)
2 Connect the connector of the target solenoid valve.
3 Inject the makeup ink with the flush bottle from the holes shown in the
following figure until it overflows and leave for about 10 minutes.
4 Operate the target solenoid valve repeatedly about 10 times on the
"Solenoid Valve/Pump Test" screen. If an operation sound can be
confirmed, the repair work is completed. If not, replace the solenoid
valve.
4.12.2 Repairing method for the supply pump
1 Remove the tube connecting block of the ink reservoir and connect the
hand pump.
Pipe
Pipe[M]
2 Operate the pump, MV2, and MV6 in this order on the "Solenoid
Valve/Pump Test" screen.
3 Apply pressure with the hand pump.
4 If the makeup ink of the hand pump flows to the pipe M, the repair work is
completed. If the supply pump cannot be repaired in about 10 minutes,
replace the pump unit.
Hand pump
4-30
Hole (4 positions)
Hand pump specifications
Part name : Nozzle cleaning assembly
Parts No :451000