MIMAKI UJF-3042 Maintenance Manual page 11

Maintenance Manual > Operating Principle > Basic Operation > LED-UV UNIT
Model UJF-3042/FX Issued 2010.08.27 Revised 2011.09.30 F/W ver
1.1.4 LED-UV UNIT
 Outline
This UV unit is a lamp using LED and water circulation is adopted for heat release.
 Figure of constitution
LEDUVx2 DRV PCB
DRV PCB Cooling Fan
(For cooling the Drive PCB)
 Operation principle of LED-UV unit
The UV unit is equipped with eight LED-UVs, and you can control luminance and ON/OFF individually.
The flow while the UV unit operates is as below:
No. Item
1 Start drawing Turn ON the UV lamp power supply (+35V) and the LEDUVx2 DRV PCB cooling FAN.
2 During drawing Controls the amount of light and ON/OFF of each LED-UV, and lighting area, and detects errors during lighting.
When an abnormality has been detected, the error below occurs.
3 Abort of drawing Turn OFF the UV lamp power supply (+35V) by DATA CLEAR.
4 End drawing Turn OFF all LED-UVs after drawing is completed.
Turn OFF the UV lamp power supply (+35V).
 Operation principle of water cooled system
This is a system to cool the UV unit.
Controls the amount of cooling water by monitoring the temperature of the thermistor on the UVLED PCB.
No. Item
1 Waiting status
Online state
© 2011 MIMAKI ENGINEERING CO.,LTD.
3042 UVDRV Control
Assy
LEDUV Iirradiation Assy
(Water cooled system)
LED-UV UNIT
ERROR706 UV UNIT OVER HEAT (The temperature in the UV unit became higher than the specific value.)
ERROR708 UV THERMISTOR BRK (The thermistor (temperature sensor) in the UV unit came down.)
ERROR70a LED UV CURRENT (LEDUV is broken or the detected current is abnormal.)
1. Monitors the temperature of the UVLED PCB.
2. Monitors the temperature of the UVLED PCB and if it becomes 30 degrees and above,
rotates the water cooled pump and the radiator FAN. (You can set three levels of the flow
volume for the water cooled pump depending on the temperature of the UVLED.)
3. Monitors the temperature of the UVLED PCB and if it becomes 30 degrees and below,
stops the water cooled pump and the radiator FAN.
4. When an abnormality has been detected in the water cooled system, the error below occurs.
• ERROR705 WATER LACK (Water in the cooling water buffer tank became less.)
1.80 / 1.00 Remark
Water Cooling Fan Assy
Water cooling Dia-
phragm Assy
Water Cooling System
Process content
Process content
Radiator
Float Switch
Float
(For visual
check)
1.1.4 R.2.0
Rev.
2.0
1
2
3
4
5
6
7
8
P.1