Hitachi IJ UX, Service Manual

Page: 85 / 308

3-5
3.2 Controller part
- With regard to the electric parts/control board of the controller part, the functional
outline, the list of the check point and the note at the replacement are described.
3.2.1 EZJ128 board (controller board)
[ Function]
- Preparation/management of print data is performed.
- Program, user data and environment setup data are stored.
- Calendar management is performed.
- Control of the display part, touch panel, and USB memory are performed.
- Communication I/F (RS 422) with the engine part is performed.
[ Check points]
- Check points (check pins are not mounted)
Reference
number Name Content Reference
number Name Content
F1 Vcc12 +12V
(Power supply
C55+ Vcc5 +5V
for LCD backlight)
IC34-#1 Vcc33 +3.3V
F2 Vcc12 +12V IC34-#3 Vcc18 +1.8V
F3 Vcc5 +5V
(Power supply for USB)
- GND
[Notes in case of the EZJ128 board replacement]
[ Replacement procedure of EZJ128 board ]
(1) Save the data on the USB memory by using the copy data function.
(From the IJP to the USB memory)
*) In the case where the EZJ128 board is replaced in a state allowing NO back up,
follow the instruction in the next page.
(2) Turn off the power.
(3) Open the control panel and remove connection cable and battery on the EZJ128
board.
(4) Replace the EZJ128 board.
(5) Attach the connection cable and battery to the EZJ128 board.
(6) Insert the system data USB memory then turn on the power with the system data
USB memory card inserted. Download will be performed automatically.
(7) After download is completed, execute “System reset” on the second page of
the service maintenance screen.
(8) Confirm “Serial number” on the “Unit information” screen and then confirm the
date and time.
(9) Recover the data from the back up memory card by using the copy data function.
(From the USB memory to the IJP)
Caution
- When replacing EZJ128 board, system data USB memory is necessary.
System data USB memory is a memory that stores the latest version of software.
By executing download, software versions of EZJ128 and EZJ126 will be
matched. If download is not executed, it might cause unstable operation due to
mismatching of the software version.
- Saving of user data is necessary.
Save the data to USB memory by using the following procedure before replacing
the EZJ128 board, and recover the data after the replacement.
The same memory can be used for both System data USB memory and Backup
USB memory. Use USB memory (1GB or larger), which is commercially available.
- Before replacing boards, be sure to turn off the power.
- After replacing boards, be sure to joint connectors to right places.
Refer to 3.2.3 LCD and 3.2.4 Touch panel for the insertion and extraction of
Connectors of CN4 and CN6.
- 3 locations of fixing screws are shown in EZJ128 external view.
!
As for the Unit
Information, see “2.10
Unit information”.
As for the copy data
function, see “2.9
Backup”.
As for the System
reset, see “2.8 System
reset”.