Hitachi UX Twin Nozzle Service Manual page 350

6.5.26 Solenoid unlock failure
Solenoid unlock
failure
Does the lever handle
touch solenoid-pin?
No
Is solenoid unlocked when
"Solenoid valve/pump test"
is conducted?
No
Does MV1 work
during "Solenoid
valve/pump test"?
No
Is CN22 connector on
EZJ133 board
disconnected or having
poor connection?
No
Is CN2 and CN5
connector on EZJ138
board disconnected or
having poor connection?
No
Replace EZJ133 board. *1
(*1): When you replace EZJ133 board, refer to [Replacement procedures of EZJ133
board] in "3.3.1 EZJ133 board (MPU board)".
[Caution]
Be sure to check that there is no wrong connection of harnesses by referring to
[Connector numbers and Identifying method of harnesses] in "3.3.20 Electrical
Connection Diagram".
Yes
Yes
Swap the two connectors of Ink
solenoid cable (13) and Makeup
Yes
solenoid cable (14) and then check
if the solenoids can be unlocked
during "Solenoid valve/pump
test". (*2)
No
Replace the solenoid which cannot
be unlocked in the first place.
Yes
Yes
No
6-108
Push the lever handle into backward.
Yes
Remove the connector once and
reconnect it.
Is solenoid unlocked
when "Solenoid
valve/pump test" is
conducted?
Yes
END
[Caution]
(*2) Should two connectors of ink/makeup
solenoid be swapped, restore them to their
original position.
END