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micro dot printer
M-190G
Specification
Rev. No.
Notes
STANDARD
C
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SEIKO EPSON CORPORATION
MATSUMOTO MINAMI PLANT
2070 KOTOBUKI KOAKA, MATSUMOTO-SHI, NAGANO, 399-8702 JAPAN
PHONE(0263)86-5353 FAX(0263)86-9923
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REVISION SHEET
The table below indicates which pages in this specification have been revised.
Before reading this specification, be sure you have the correct version of each page.
Sheet 1 of 2
Revisions
Design Section
Sheet Rev. No.
Rev. Document
WRT
CHK
APL Sheet Rev. Sheet Rev. Sheet Rev.
A Enactment
Takeuchi
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Arai I C 20 C
B Change
C Change
Aoki
Narita
Arai
II C 21 C
III C 22 C
IV C 23 C
V C 24 C
25 C
1 C 26 C
2 C 27 C
3 C 28 C
4 C 29 C
5 C 30 C
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6
7
C 31 C
C 32 C
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8C
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10 C App.1 C
11 C App.2 C
12 C
13 C
14 C
15 C
16 C
17 C
18 C
TITLE
M-190G
Specification
(STANDARD)
19 C
Front Part
Rev.
General Table of
Cover Sheet Scope Description Contents Contents Appendix
Total
1 2 --
4
1 32
2 42
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REV.
B
C
SHEET
2
4
28
All
III
1, 3, 5,
8, 32,
App.2
14
15
31
REVISION SHEET
CHANGED CONTENTS
1.5 Reliability
NOTES: Section 2.14.1 Section 2.14
1.13 Factory options
ERC-22(purple), ERC-09(purple) ERC-22, ERC-09
2.13 Overall Dimensions
All pages are revised due to add “Confidential” to the header.
Units are applied for SI unit system
sec s, line/sec lps [lps: lines per second], G m/s2
“Confidentiality Agreement”
Ribbon cassette ERC-40
Sheet 2 of 2
[Correction]
[Change]
[Change]
[added]
[added]
2.5.1 Electrical Characteristics
1) Electrical Characteristics of Timing Detector Open Collector Output:
Typical: 0.12 V, Maximum 0.4 V Typical: 0.3 V, Maximum 0.5 V
Absolute maximum rating 8 mA
Absolute maximum rating 8 mA (Recommended: 2 mA)
Termas: Vcc = 5 V, IOL = 8 mA Vcc = 5 V, IOL = 5 mA
2) Printer Timing Detector Circuit
Circuit of the printer side
[changed]
3) Waveform Shaping Circuit on the Designer’s Side
The designer needs to shape the printer timing detector signal with the integrator
circuit (providedDbaytathSehdeeest4igUn.ecro:mTime constant at the leading edge 5.7 µs, Time DataShee
constant at the trailing edge 4.7 µs) and …
The designer needs to shape the printer timing detector signal with the integrator
circuit (provided by the designer: Time constant at the leading edge 12.7 µs,
Time constant at the trailing edge 10 µs) and …
2.13 Overall Dimensions
[changed]
TITLE
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M-190G
Specification
(STANDARD)

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Confidential
Points You Must Observe To Assure Product Safety
In order to assure the safe operation of this product, carefully observe the specifications as
well as the notes provided below.
Seiko Epson Corporation will not bear any responsibility for any damage or injuries arising
from use of this product that is not in accordance with the specifications and the notes
provided below.
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Notes on Printer Control
1. Absolute maximum voltage
1) Printer voltage: 5.8 VDC or less
(Apply to the print solenoid, motor, trigger solenoid, for fast paper feeding and detectors.)
2. The conditions setting forth the maximum time power can be applied (and the maximum voltage that
can be applied) to electronic components such as the motor, and magnets must be observed.
If the maximum time power can be applied (or the maximum voltage that can be applied) is exceeded,
the components mentioned above could overheat and start a fire or begin to smoke.
1) Motor
The motor is DC brush motors which can be short-circuited and must there fore be protected
using a fuse that is properly matched to the power supply.
2) Print Solenoid
Under any condition (incluDdaintagSshoeftewt4aUre.croumnaway), the maximum power-on time may not
exceed 1 second.
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3) Fast Trigger Solenoid
Under any condition (including software runaway), the maximum power-on time may not
exceed 5 seconds.
4) All Detectors (Sensors and Switches)
All detectors must protect the circuitry so that current never exceeds the maximum standard.
Notes on Handling
The case must be designed so that movable parts such as gears, etc., are not exposed.
Touching moving parts could cause a laceration or other injury.
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M-190G
Specification
(STANDARD)
SHEET
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Explanation of Voltage Terminoloty
In previous specifications for out printers, M-180, M-190, and so on, we identified a usable voltage as
“terminal voltage”; however from this specification for the M-192G on, we will call a usable voltage
“power supply voltage” and also provide voltage ranges, including loss of power supply, voltage when
energizing, and voltage loss from driver and circuit lines.
This is because the previous term, “terminal voltage”, caused confusion between voltage at the
terminals and the power supply voltage.
If the voltage at the terminals is not within specifications, there is a risk that the drivers will not be driven
properly. That’s why we changed it to an expression that could not be misunderstood. Therefore,
this change in terminology doesn’t require a change in the power supply used for M-190 series.
Explanation of Power Supply Voltage
M-190G power supply voltage 5 ± 0.5 V
(when a stabilized power supply is used);
5 +0.8/-0.5 V (when a Ni-Cd battery is used)
The voltage loss in each terminal, even during sending of current to print solenoids, the voltage
loss in the power supply and loss from loss wiring resistance must be 0.8 V or less. Also, the
voltage loss in the driver circuitry (driver saturation voltage) must be 0.4 V or less.
Compared to this, the specification for the M-190 provides that:
M-190 terminal voltage
4.8 +0.4/-1.5 V (when a stabilized power supply is used);
4.8 +0.7/-1.5 V (when a Ni-Cd battery is used)
These values are defined as assumed the following conditions:
M-190 power supply voltage
5 ± 0.5 V
(when a stabilized power supply is used);
5 +0.8/-0.5 V (when a Ni-Cd battery is used)
The total for the power supplyDvaotlataSgheeleots4sUp.cluosmthe voltage loss from resistance in the wiring plusDataShee
the voltage loss in the driver circuit must be within 1.2 V. (0.8 V + 0.4 V = 1.2 V)
Therefore, the lowest permissible voltage from the driver circuit when energizing is 3.3 V.
([4.5 V - 0.8 V = 3.7 V] - 0.4 V = 3.3 V.)
Also, in either printer mechanism, at the typical print speed, a motor terminal voltage is assumed to be
4.8 V. However, this is obtained by estimating that the voltage loss in the motor terminal during
continuous printing is am average of 0.2 V.
Therefore, there is no substantial terminal difference in the usable ranges of power supply and terminal
voltages between M-190G and M-190.
In either mechanism, the maximum value of the voltage when a Ni-Cd battery is used is 0.3 V above
the 5.5 V maximum when a stabilized power supply is used. This maximum value allows for the
high-voltage situation that occurs temporarily when the Ni-Cd battery is fully charged. This value is not
guaranteed for continuous use.
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TITLE
M-190G
Specification
(STANDARD)
SHEET
NO.
REVISION
C NEXT
III
SHEET
II