Hitachi UX Twin Nozzle Service Manual page 4

3. Maintenance of controlling part······································································· 3-1
3.1 Structure of controlling part ···································································· 3-1
3.2 Controller part ····················································································· 3-5
3.2.1 EZJ128 board (controller board) ························································· 3-5
3.2.2 Battery ·························································································· 3-8
3.2.3 LCD ······························································································ 3-10
3.2.4 Touch panel ···················································································· 3-12
3.3 Engine part ···························································································· 3-13
3.3.1 EZJ133 board (MPU board) ································································ 3-13
3.3.2 Battery ·························································································· 3-17
3.3.3 Model Key ······················································································ 3-18
3.3.4 Language Key (Option) ····································································· 3-18
3.3.5 EZJ125 board (Nozzle1 drive board) ····················································· 3-19
3.3.6 EZJ134 board (Nozzle2 drive board) ····················································· 3-22
3.3.7 EZJ127 board (I/O board) ··································································· 3-25
3.3.8 EZJ138 board (Ink circulation module connection board) ························· 3-31
3.3.9 EZJ113 board (Power relay board 1) ··················································· 3-32
3.3.10 EZJ139 board (Power relay board 2) ················································· 3-34
3.3.11 EZJ114 board (LED / SW board) ······················································· 3-36
3.3.12 EZJ119A board (Relay output board) (Optional board) ························· 3-36
3.3.13 EZJ130 board (Software option control board) ······································· 3-38
3.3.14 EZJ129 board (Software option terminal board) ····································· 3-40
3.3.15 Multiple Power Supply 1 and 2
3.3.16 High Voltage Power Supply 1 and 2 ··················································· 3-51
3.3.17 DC fan ························································································· 3-52
3.3.18 LAN communication function ····························································· 3-52
3.3.19 RFID reader ··················································································· 3-53
3.3.20 Electrical Connection Diagram ··························································· 3-55
4. Maintenance of Circulation System ································································ 4-1
4.1 Structure of Circulation System ·································································· 4-1
4.1.1 Structure of Circulation System ···························································· 4-1
4.1.2 Access to the parts on the front side of the equipment ······························ 4-4
4.1.3 Access to the parts on the rear side of the equipment ······························· 4-6
4.2 Main Ink Tank Maintenance ······································································ 4-8
4.2.1 Structure of Main Ink Tank ··································································· 4-8
4.2.2 Main Ink Tank Replacement Procedure ·················································· 4-9
4.3 Pressure Reducing Valve Replacement Procedure ········································ 4-12
4.4 ICU Joint Structure and Handling ······························································· 4-13
4.5 Solenoid Valves Replacement Procedure ···················································· 4-14
4.6 Pressure Sensor Replacement Procedure ··················································· 4-18
························································ 3-48