MIMAKI JV33 Series User manual

MIMAKI ENGINEERING CO., LTD.
JV33 Precautions of replacing PCB
D900674 Ver1.1
1. Overview
This document describes to determine whether a problem is caused by a damage of the PCB ASSY
related to a print head control. If the problem mentioned below occurred, it is necessary to check
condition of the damage of each part (ASSY) since the PCB could have been broken:
(1) All nozzles or nozzle line of each color would not fire. Nozzle drop out would be caused by a
certain scanning position.
(2) The printer would not be turned on. Nothing would be shown on LCD even if turning on the
power.
(3) Occurred “ERROR 07 VOLTAGE” or “ERROR 07 HEAD 0”
(4) Occurred “ERROR 09 HDC ERROR”
(5) Occurred “ERROR 200 HEAD MEMORY”
(6) Occurred “ERROR 50 MEDIA DETECT”
2. Tools to be used
Digital tester (or analog tester): it is used for measuring resistance and DC voltage
1/7 D900674 Ver1.1
5. Checking damage
of the print heads
(
Pa
g
e 3
)
6. Checking damage
of the Main PCB
ASSY (Page 4)
Problem occurre
d
7. Checking damage
of the Ink slider PCB
(Page 5)
A
4. Determining
COM short circuit
(Page 2)
8. Determining to
replace HDC FFC
ASSY (Page 6)
OK Replace the
Print heads
Replace the
Main PCB ASSY
Replace the
Ink slider PCB
N
G
N
G
N
G
OK A
OK
N
G
N
G
A
Replace the
HDC FFC ASSY
A
A
If the problem
would not be
solved, please
contact
MIMAKI with
the condition
of the printer.
OK
Finish

MIMAKI ENGINEERING CO., LTD.
3. Before work
CAUTION: Be sure to follow the instructions below to confirm that there is no residual voltage in the
circuit board every time turning OFF the power not to limit the extent of damage.
Regenerative resistivity board
42V Test pin
(1) Turn the front switch (green button) off, then turn the main power off and
pull the power cable out.
(2) Wait approx. 15 minutes for the residual voltage to be discharged from
the circuit board. In the meantime, remove the covers such as the electric
BOX.
(3) Check if 42V voltage in the Main PCB ASSY is discharged by using the
tester. If the voltage is shown more than 1V, wait a few more minute.
4. Determining COM short circuit
(1) Measure resistance between the test pin TP1-TP8 and GND on the Main PCB ASSY and judge
whether the COM circuit is good or not with List 1.
Connect the Negative terminal of the tester to the GND test pin (GND1-9) and measure the
resistance by getting the Positive terminal touch to TP1-8
In case of the machine which would not be turned on, it is highly possibility of impedance anomaly
of the COM circuit and short circuit between 42V and GND in the Main PCB.
(2) If any of COM circuit defect is suspected, check the condition of each part by following the
instructions described from the next page.
List 1
TP2
TP1
TP3
TP4
TP5
TP6
TP7
TP8
Notes:
If all the measured value
of the TP is shown in the
range of Abnormal COM
circuit, please measure
that of normal circuit
board and compare with
them since it may be
variety of the tester.
Test pin Normal COM circuit Abnormal COM circuit
TP1
TP2
TP3
TP4
TP5
TP6
TP7
TP8
17K-18KΩ
Good
Less than 17KΩ,
More than 18KΩ
Bad
2/7 D900674 Ver1.1

MIMAKI ENGINEERING CO., LTD.
5. Checking damage of the print heads
(1) Release the lock for HDC_FFC 130/160 ASSY connected to CN1-CN4 in the Main PCB ASSY.
(2) Remove HDC_FFC 130/160 ASSY.
(
1
)
(2)
(
1
)
(3) Measure resistant between the test pin TP6-13 and GND in the Ink slider PCB and judge whether
the value is good or not with List 2
Connect the Negative terminal of the tester to the GND test pin (TPG1-5) and measure the
resistance by getting the Positive terminal touch to TP6-13
List 2
TP8
TP13
TP12TP7TP9
TP10
TP11TP6
Notes:
If any of COM line defect
is found, the print head is
broken. Please replace the
print heads first.
If connecting normal Main
PCB without replacing
them, it will cause the PCB
damage continuously.
Test pin Normal print head Abnormal print head
TP6
TP7
TP8
TP9
TP10
TP11
TP12
TP13
10MΩand more
Good
Less than 10MΩ
Bad
3/7 D900674 Ver1.1

MIMAKI ENGINEERING CO., LTD.
6. Checking damage of the Main PCB ASSY
(1) Release the lock located both sides of the connector for HDC_FFC 130/160 ASSY connected to
CN1-CN4 in the Main PCB ASSY and then remove HDC_FFC 130/160 ASSY.
(2) Measure resistance between the test pin TP1-TP8 and GND on the Main PCB ASSY and judge
whether the COM circuit is good or not with List 3.
Connect the Negative terminal of the tester to the GND test pin (GND1-9) and measure the
resistance by getting the Positive terminal touch to TP1-8
In case of the machine which would not be turned on, it is highly possibility of impedance
anomaly of the COM circuit and short circuit between 42V and GND in the Main PCB.
List 3
TP1
TP2
TP3
TP4
TP5
TP6
TP7
TP8
Notes:
If all the measured
value of the TP is
shown in the range
of Abnormal COM
circuit, please
measure that of
normal circuit board
and compare with
them since it may be
variety of the tester.
Test pin Normal Main PCB COM Abnormal Main PCB COM
TP1
TP2
TP3
TP4
TP5
TP6
TP7
TP8
17K-18KΩ
Good
Less than 17KΩ,
More than 18KΩ
Bad
4/7 D900674 Ver1.1

MIMAKI ENGINEERING CO., LTD.
7. Checking damage of the Ink slider PCB
(1) Remove 6 FFC at CN1-CN6 on the Ink slider PCB.
(2) Measure resistance between 3.3V pattern and GND pattern in Ink slider PCB and judge whether
it is good or not with List 4.
* Connect the Negative terminal of the tester to the GND test pin (TPG1-4) and measure the
resistance by getting the Positive terminal touch to 5-8 pin of CN3.
* In the case ERROR 200 or ERROR 50 occurred even if replaced the print heads, it is highly
likely that U1 (CPLD, E600074) of Ink slider PCB is damaged.
Ink slider PCB
U1
6 / 8 pin
5 / 7 pin
GND
5-8 pin of CN3
List 4
Test pin Normal U1 Abnormal U1
CN3-5
CN3-6
CN3-7
CN3-8
5KΩand more
Good
Less than 5KΩ
Bad
5/7 D900674 Ver1.1

MIMAKI ENGINEERING CO., LTD.
8. Determining to replace HDC FFC 130/160 ASSY
(1) Check whether the reinforcing part (light blue) of HDC FFC 130/160 ASSY connected to the Ink
slider PCB is folded or not. If they are folded, please replace them since the folded FFC may
cause disconnection.
Bad example 1 Bad example 2
Good
Attach the FFC vertically from the connector and have a margin of the curved FFC.
It is bad because FFC are
folded obviously
Disconnection part
Please replace the FFC if it is obviously folded
along the edge of the reinforcing part shown
above.
Electrolytic capacitor C8, C9
Attach the FFC not to exceed the
height of electrolytic capacitor.
Caution:
•Take care not to touch the connecting part of the FFC with your finger and prevent
the FFC from liquid such as ink and washing fluid. If not, contact failure may be
caused.
•If the FFC is slipped and pulled at the outlet of the connecter on the Slider PCB,
when operating [#TEST]-[MOTOR TEST]-[Y SERVO MOTOR] to make the
carriage scan with full-width of the machine continuously, fix the twisted ink tubes in
the cable bear and the position of FFC with keeping the margin of the curve to reduce
slide slip.
6/7 D900674 Ver1.1

MIMAKI ENGINEERING CO., LTD.
Ver Date Revision history
1.0 2008/6/18 Newly issue
1.1 2008/7/2 [1] Added “ERROR 07 HEAD 0”
[3] Added photo
Added a step to turn off the power
[7] Corrected the List 4
[8] Added a caution to handle the contact part of FFC
7/7 D900674 Ver1.1