Particular Color Is Not Printed At All; Shifting In Printing / Color Shifting - Roland VersaUV LEJ-640 Service Notes

6-2 PARTICULAR COLOR IS NOT PRINTED AT ALL

NO CHECKING POINT
Ink Cartridge is almost
1
empty
Ink in Ink Cartridge is
2
cured
Error of Ink Empty
3
detection
Bad contact/Broken
4
cable
5 Defect of Cap Top
6 Air bubbles in ink line
7 Ink in Damper is cured Damper Replacement
8 Broken Ink Tube
Broken Fuse on the
9
Head Board
10 Broken Head Board
11 Broken Head
12 Broken Main Board

6-3 SHIFTING IN PRINTING / COLOR SHIFTING

NO CHECKING POINT
The media is not fed
1
straight
Encoder Scale is
2
dirty/broken
ACTION
Check remaining Ink /
Replace the Ink User's Manual
Cartridge
Ink Cartridge
Replacement
Replace the Ink
Cartridge / Sensor
Refix / Replace the
cable
[3-3 CAP TOP
Cap Top Replacement
REPLACEMENT]
Powerful Cleaning /
Remove air bubbles
by a syringe
Eliminate the
looseness of the tube
joint
[3-17 INK DAMPER
REPLACEMENT]
[3-8 INK TUBE
Ink Tube Replacement
REPLACEMENT]
Replace the Fuse on
the Head Board
Head Board
Replacement
[3-1 HEAD
Head Replacement
REPLACEMENT]
Main Board [3-9 BOARDS
Replacement REPLACEMENT]
ACTION
Set the media
User's Manual
correctly
[3-12 ENCODER
Clean or replace
SCALE
Encoder Scale
REPLACEMENT]
REFERENCE
When the printer keeps printing with Ink Cartridge almost
empty, the negative pressure delivered in the ink tube
causes the improper ink supplying and the head cannot
fire the ink correctly.
If a used Ink Cartridge is not stored in the aluminum bag,
the ink around the spout of Ink Cartridge might be cured
due to the UV light. Also, if the Ink Cartridge is exposed
under high temperature for a long time, the ink might be
cured too.
If the cartridge tab does not come out when the cartridge
is empty, Ink Empty cannot be detected and printing
continues without firing ink. Also, if the sensor is not
working, Ink Empty cannot be detected even if the
cartridge tab sticks out.
If there is a bad communication between the head and the
Main Board, the signal for driving head is not sent properly
and results in not printing properly. If the Flexible cable is
fixed slanted, it may cause the bad electrical contact or
short-circuit. And, the cable which has been connected
and disconnected several times may have a damaged
terminal.
If the Head is not capped correctly, the Head dries and it
may cause the Head nozzle clogging.
When air bubbles come inside the ink line, the head may
not fire the Ink temporarily. Air bubbles tend to go into the
Ink line if Ink Cartridge is installed and uninstalled so many
times. The air bubbles inside the lines can be removed by
performing the powerful cleaning or using a syringe.
If the tube has air due to the looseness of the tube joint, fix
the joint and remove the air.
Ink in the damper might be cured when it is irradiated with
UV light. If it is cured, the head does not fire the ink
properly because the damper cannot supply the ink
smoothly.
The F1 Fuses are for C and M (Head H1 and H2), the F2
Fuses are for Y and K (H3 and H4), and the F3 Fuses are
for GL and W (H5 and H6). If the C and M Heads do not
fire the Ink at all, the F1 Fuse may be defective. If the Y
and K Heads do not, the F2 Fuse may be defective. If the
GL and W Heads do not, the F3 Fuse may be defective.
There might be a problem with the other devices on the
Head Board if the Fuses are not defective.
REFERENCE
If media is not set straight, it comes loose on the Platen
and it wrinkles, then results in shifting. Set the media
straight by referring to the User's Manual. Also, when
using the rigid media, if the pinch roller at the edge of the
media is not fully placed on the media, the media will not
be fed properly.
When Encoder Scale is not read correctly, printing position
may shift.
6-3
OUTLINE
OUTLINE