EZ Manual
M-8400RVe
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EZ Manual: M-8400RVe
3
Electric Checks and Adjustments
Chart 1
Dial test point
Comment
Voltage
+5.0 VDC
+2.0 VDC
+3.3 VDC
+24.0 VDC
Voltage Range
+4.8V to +5.2V
+1.9V to +2.1V
+3.1V to +3.5V
+23.5V to +24.5V
Check pin on TP Test Module and Main PCB
Adjustment to VR
0
1
2
3
DC power Supply
DC power Supply
DC power Supply
DC power Supply
CH3A(+5.0V) - CH1A(GND)
CH4A(+2.0V) - CH1A(GND)
CH5A(+3.3V) - CH1A(GND)
CH6A(+24.0V) - CH1A(GND)
N/A
N/A
N/A
N/A
Low level (Set the blank area
on the sensor) = A
High level (Set the I-mark
on the sensor) = B
4
I-Mark Sensor Level
CH1B(+8.4V) - CH1A(GND)
VR5
High level - Low level =
A - B = more than +0.9V
Low level (Set the label backing liner or the
centre hole [in case of the centre hole tag]
on the sensor) = C
High level (Set the label or
tag on the sensor) = D
5
Gap sensor Level
CH2B - CH1A(GND)
VR4
High level - Low level =
C - D = more than +1.0V
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4
Potentiometers are located on MAIN PCB.
Electric Checks and Adjustments
Chart 2
VR1(OFS)
VR2(DEM)
VR3(CE)
Pitch Offset Adjustment
Dispenser Sensor Level Adjustment
Ribbon Sensor Level Adjustment
Gap Sensor Level Adjustment
I-Mark Sensor Level Adjustment
VR5 I-mark
VR4 Gap
VR4(GAP)
VR5(IM)
VR1 Offset
VR2 DEM
VR3 CE
MAIN PCB
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EZ Manual: M-8400RVe
5
Potentiometers are located on FRONT PANEL
Electric Checks and Adjustments
Chart 3
PRINT
Adjust Print Darkness
Adjust FEED/BACKFEED
Adjust Pitch Offset
OFFSET
PITCH
DISPLAY
Adjust Display Darkness
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6
Excessive ribbon and rewind tension will result in variable
motion and could be the cause of print quality problems.
Ensure the ribbon rewind and unwind tensions are within
specifications or adjustment of either clutch is necessary.
STEPS
Ribbon Clutch
Adjustment
1 Switch the printer OFF and disconnect the power
cable.
2 Raise the top access door and open the front access
Required equipment
door. Remove the ribbon and label stock if installed.
1 Empty Ribbon Core and String
2 12mm Wrench
3 Attach string to an empty ribbon core and place on
the Ribbon Spindle. Wind the string tightly around the
ribbon core in single layer and in clockwise direction.
Attach the end of the string to the tension gauge.
3 1kg or 2kg Tension Gage
4 #2 Pozidrv Screwdriver
3
4
4 Gradually liftthe tension gauge, pulling the string unwind
it from the core. Once the spindle starts to move, the
gauge should be indicate 950 to 1050 grams of tension
for ribbon rewind, and 550 to 650 grams of tension
for ribbon unwind. Refer to pictures in next page.
2
5 To adjust the clutch, loosen the locking screw and
move the adjust nut CW for more tension and CCW
for less tension. Tighten the locking screw and repeat
steps 3 and 4 until the correct tension is achieved.
1
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EZ Manual: M-8400RVe
7
Ribbon Unwind Clutch 550g-650g Unwind
Ribbon Clutch
Adjustment
continued
Locking Screw is inside Adjust Nut
Adjust Nut
Ribbon Rewind Clutch 950g-1050g Rewind
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8
Minor Adjustment
STEPS
Print Head Position
Alignment
Required equipment
10mm Open End Wrench
“+”Screw-driver
1 Loosen the screws on the head plate. Print user test
pattern. Realign the print head by prying adjust plate
forward or backward with flat blade screwdriver. Refer
to illustrations and note adjustment marks.
(JIS No.2 equivalent)
To adjust the print head alignment and consistent quality
across label, perform the following steps:
2 Tighten the screws.
Adjustment Marks
Screw
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EZ Manual: M-8400RVe
9
Major Adjustment
Print Head Balance
Adjustment
Required equipment
“+”Screw-driver
(JIS No.2 equivalent)
STEPS
1
Loosen the set screw.
Turn the adjust screw in clockwise or
in counter-clockwise direction depending on the situation
2 Turn the adjust screw to make adjustment.
3 If the front side of label is too light, turn the screw in
clockwise direction.
4 If the front side of label is too dark, turn the screw in
counter-clockwise direction.
Loosen the set screw
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