Hitachi UX Twin Nozzle, Service Manual

Page: 341 / 355

6-99
6.5.16 Power does not turn ON after pressing Start button
Power is not
turned ON.
Does the trouble fixed when the connetors
below are disconnected once and reconnected?
-CN20, CN23, CN2, CN34 and CN28 of EZJ133
-CN4 of EZJ113
-CN4 of EZJ139
-CN2 of EZJ114
Yes
Does the trouble fixed after
replacing the EZJ114 board?*1
Does the trouble fixed after
replacing the multiple DC
power supply1 ? *4
Yes
Resume the
operation
Yes
Replace the EZJ133 board.*5
。
Does the trouble fixed after
replacing the EZJ113 board?*2
Yes
No
No
No
(*1): When you replace EZJ114 board,
refer to [Notes in case of the board
replacement] in “3.3.11 EZJ114
board (LED / SW board)”.
(*2): When you replace EZJ113 board,
refer to [Replacement procedures
of EZJ113 board] in “3.3.9 EZJ113
board (Power relay board 1)”.
(*3): When you replace EZJ134 board,
refer to [Replacement procedures
of EZJ134 board] in “3.3.6 EZJ134
board (Nozzle2 drive board)”.
(*4): When you replace Multiple power
supply1, refer to [Replacement
procedures of multiple power
supply] in 3.3.15 Multiple Power
Supply 1 and 2.
(*5): 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”.
Does the trouble fixed after
replacing the EZJ134 board?*3
Yes