Hitachi UX Twin Nozzle Service Manual page 341

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
Does the trouble fixed after
replacing the EZJ114 board?*1
Does the trouble fixed after
replacing the EZJ113 board?*2
Does the trouble fixed after
replacing the EZJ134 board?*3
Does the trouble fixed after
replacing the multiple DC
power supply1 ? *4
Replace the EZJ133 board.*5
。
Yes
No
Yes
No
Yes
No
Yes
Yes
Resume the
6-99
(*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
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
Electrical Connection Diagram".
operation
of multiple power
harnesses] in "3.3.20