Datamax M-Class Mark II Maintenance Manual

M-Class Mark II

Maintenance Manual

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Firmware (Software) Agreement:

The enclosed Firmware (Software) resident in the Printer is owned by Licensor or its suppliers and is licensed for used only on a single printer in the user’s Trade or Business. The User agrees not to, and

not to authorize or permit any other person or party to, duplicate or copy the Firmware or the information contained in the non-volatile or programmable memory. The firmware (Software) is

protected by applicable copyright laws and Licensor retains all rights not expressly granted. In no event will Licensor or its suppliers be liable for any damages or loss, including direct, incident al, economic, special, or consequential damages, arising out of the use or inabilit y to use the Firmware (Software).

CAUTION

Lithium Battery: There is a danger of explosion or fire if the battery is incorrectly

replaced. Replace only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer’s instructions.

Information in this document is subject to change without notice and does not represent a commitment on the part of Datamax-O’Neil. No part of this manual may be reproduced or transmitted in any form or by any means, for any purpose other than the purchaser's personal use, without the expressed written permission of Datamax-O’Neil.

Part Number 88-2347-01 Rev. B

Contents

1 2 3 4

Overview Adjustments and Maintenance Troubleshooting Removal and Replacement

Overview

1.0 Introduction ........................................................................................ 1

1.1 About this Printer ................................................................................. 2

1.0 Introduction

Overview

This manual, which primarily includes technical information relating to the electrical and mechanical components, is intended for use by qualified serv ice personnel in the maintenance and repair of M-Class Mark II printers. For related information, refer to the following documents, available for download at http://www.datamax-oneil.com/

 For operating information, reference the Operator’s Manual (part number 88-2340-01).

 For software information, reference the Class Series 2 Programmer’s Manual (part

number 88-2341-01).

Important Information:

In this manual, the exclamation point inside an equilateral triangle is intended to alert the technician to the presence of important operating, maintenance or servicing information. Always, as with all electrical equipment, follow basic safety precautions to avoid personal injury or printer damage.

1-1

Overview

1.1 About this Printer

The following drawing illustrates the basic exterior components an d controls of the printer. The model number can be found on the Serial Tag affixed to the rear of the unit. Use this model number when referencing specific information within this manual. (Because optional items are not present on all models, certain printer configurations may not appear in some of the illustrations in this manual.)

Access Cover

Ribbon Supply Hub

Ribbon Take-Up Hub

Centerplate

Front Panel

Printhead Assembly

Printhead Latch

Fascia

Media Sensor

Media Guide

Media Supply Assembly

(Hanger or Hub)

Ribbon Idler

Internal Rewinder

Media Idler

1-2

Adjustments and Maintenance

2.0 Introduction........................................................................................ 1

2.1 Maintenance ....................................................................................... 1

2.1.1 Cleaning the Printhead ................................................................2

2.1.1.1 Cotton Swab Procedure.................................................. 3

2.1.1.2 Cleaning Card Procedure ................................................ 4

2.1.1.3 Cleaning Film Procedure................................................. 5

2.1.2 Cleaning the Media Sensor........................................................... 6

2.1.3 Cleaning the Platen..................................................................... 6

2.1.4 Cleaning the Ribbon Path............................................................. 7

2.2 Media Sensor Calibration ......................................................................9

2.2.1 Calibrating Non-Display Models.....................................................9

2.2.1.1 Automatic Calibration..................................................... 9

2.2.1.2 Manual Calibration....................................................... 10

2.2.2 Calibrating Display-Equipped Models............................................ 11

2.2.2.1 Quick Calibration......................................................... 11

2.2.2.2 Standard Calibration.................................................... 12

2.2.2.3 Advanced Entry Calibration........................................... 15

2.3 Media Width Adjustment..................................................................... 21

2.4 Printhead Burn Line Adjustment........................................................... 22

2.5 Printhead Pressure Adjustment............................................................ 23

2.6 Ribbon Path Alignment ....................................................................... 23

2.7 Darkness Adjustment ......................................................................... 26

2.8 Downloading Firmware and Fonts......................................................... 26

2.9 Resetting the Printer .......................................................................... 27

2.9.1 Non-Display Models................................................................... 27

2.9.2 Display-Equipped Models ........................................................... 27

2.10 Printhead Voltage Adjustment.............................................................. 28

Adjustments and Maintenance

2.0 Introduction

This section covers maintenance and alignment procedures.

2.1 Maintenance

Recommended items, techniques, and schedules to help you safely and effectively maintain the printer are detailed below. Keep the following items on hand to clean the printer:

• Isopropyl alcohol • Soapy water/mild detergent

• Cotton swabs • Compressed air

• Soft-bristle brush • Printhead Cleaning Cards or Printhead Cleaning Film

For your safety and to avoid damaging the printer, turn OFF and unplug the printer before cleaning. Always take proper precautions when using isopropyl

CAUTION

Area / Item Cleaning Interval * Method / Supplies

Printhead

Platen and

Assist Rollers

Peel Assembly

Media & Ribbon

Path, & Media

Sensor

alcohol, a flammable liquid.

Recommended Maintenance Schedule

After each roll of ribbon if using thermal transfer media, or after each roll of media (or as needed) if using direct thermal media.

After each roll of labels, after each roll of ribbon, or as needed.

As needed, based on a weekly visual inspection.

Cotton swab dampened with isopropyl alcohol; and, if necessary, use Printhead Cleaning Cards or Cleaning Film (see Section 2.1.1).

Cotton swab or cloth dampened with isopropyl alcohol wiped across the entire roller (see Section 2.1.3).

Cotton swab dampened with isopropyl alcohol; wipe until clean.

Compressed air or a soft brush. Isopropyl alcohol, as needed (see Section 2.1.2 and 2.1.4).

Exterior

Surfaces

*Whichever interval comes first.

As needed, based on a weekly visual inspection.

Mild detergent applied with a dampened cloth; wipe until clean.

2-1

Adjustments and Maintenance

2.1.1 Cleaning the Printhead

NEVER use a sharp object to clean the Printhead; damage can result.

CAUTION

If print quality declines (symptoms can include non-compliant bar codes, print dropouts, streaks on the label), the typical cause is debris build-up on the printhead. Furthermore, if the build-up is not removed it may lead to element failure, greatly reducing the life of the printhead.

Faulty Label: Instead of consistent patterns, streaks in the print

indicate a dirty or faulty printhead.

According to the media, ribbon, and printing parameters used, different methods are recommended for cleaning the printhead. In all cases, perform the f ollowing preliminary operations:

Preliminary Cleaning Steps:

1. Stop printing. Raise the cover, unlock the Printhead Latch then raise the Printhead Assembly and allow the printhead to cool.

2. Remove media and ribbon from the printer then proceed according to your cleaning requirements.

2-2

Adjustments and Maintenance

2.1.1.1 Cotton Swab Procedure

This procedure is recommended if using direct thermal media, or thermal transfer media with a wax ribbon.

1. Perform the Preliminary Cleaning Steps, as described in Section 2.1.1.

2. Turn OFF and unplug the printer. Using a Cotton Swab moistened (not soaked) with isopropyl alcohol, gently clean the entire Printhead surface, paying special attention to the Burn Line, until all build-up is removed.

3. Allow the printhead to dry. Reinstall media (and ribbon, if needed). Lower and latch the Printhead Assembly. (If necessary, perform a Media Width Adjustment; see Section

2.3.) Close the cover. Plug in and turn ON the prin ter. Run several sample labels and examine the print quality. If streaks are still present, see Section 2.1.1.2; otherwise, this completes the procedure.

2-3

Adjustments and Maintenance

2.1.1.2 Cleaning Card Procedure

This procedure is recommended for printers using direct thermal media, or thermal transfer media and a wax-based ribbon. Also use this procedure if symptoms continue after the Cotton Swab Procedure (Section 2.1.1.1) has been tried.

1. Perform the Preliminary Cleaning Steps, as described in Section 2.1.1.

2. Place a Cleaning Card (part number 70-2013-01) under the printhead.

3. Lower and latch the Printhead Assembly. Disengage the Media Width Adjustment; see Section 2.3.

4. Close the cover. Proceed according to printer type:

• Display-Equipped Models –

Press and hold TEST for approximately four seconds. (As an alternate, CLEAN HEAD NOW can be selected in the menu system.)

• Non-Display Models –

Repeatedly press FEED until the Cleaning Card exits the printer.

5. Reinstall media (and ribbon, if necessary). Lock the Printhead Latch. If necessary, perform a Media Width Adjustment, see Section 2.3. Close the cover. Run a few sample labels and examine them. If streaking is still present, go to Section 2.1. 1.3; otherwise, this completes the procedure.

2-4

Adjustments and Maintenance

2.1.1.3 Cleaning Film Procedure

This procedure is recommended for printers using a resin ribbon with thermal transfer media, or for printers that typically use a Heat Value of 22 or higher. Also use this procedure if symptoms continue after the previous cleaning methods have been tried.

1. Perform the Preliminary Cleaning Steps, as described in Section 2.1.1.

2. Place a sheet of Cleaning Film (part number 70-2087-01) under the printhead.

3. Lower and latch the Printhead Assembly. Disengage the Media Width Adjustment; see Section 2.3.

4. Close the cover. Proceed according to printer type:

• Display-Equipped Models –

Press and hold TEST for approximately four seconds. (As an alternate, CLEAN HEAD NOW can be selected in the menu system.)

• Non-Display Models –

Repeatedly press FEED until the Cleaning Card exits the printer.

5. Turn OFF and unplug the printer. Open the cover, unlock and raise the Printhead Assembly. Using a cotton swab moistened (not soaked) with isopropyl alcohol, gently clean the entire Printhead surface.

6. Allow the printhead to dry. Reinstall media and ribbon. Lower and latch the Printhead Assembly. If necessary, perform a Media Width Adjustment; see Section 2.3. Close the cover. Plug in and turn ON the printer. Run a few sample labels and examine them; if streaking is still present, see Section 3.1.

2-5

Adjustments and Maintenance

2.1.2 Cleaning the Media Sensor

If paper dust or debris accumulates in the Media Sensor, it can affect label detection. To prevent problems, clean as follows:

1. Turn OFF and unplug the printer. Raise the cover.

2. Unlock and raise the Printhead Assembly. Remove any media.

3. Clean the Media Sensor using compressed air or a soft brush. Use a cotton swab dampened with isopropyl alcohol as needed to remove adhesive accumulations.

4. Allow to dry. Reinstall media. If necessary, adjust the Media Sensor. Plug in and turn on the printer.

2.1.3 Cleaning the Platen

The platen contaminated with grit, label adhesive, or ink can lead to a decline in print quality and, in extreme cases, cause labels to adhere and wrap the roller. Clean the platen as follows:

2-6

Adjustments and Maintenance

1. Turn OFF the Power Switch and unplug the power cord from the AC Receptacle.

2. Raise the Cover. Unlock and raise the Printhead Assembly.

3. Remove media and ribbon.

4. Using a Cotton Swab (or lint-free cloth) dampened with isopropyl alcohol, wipe the Platen clean. Manually rotate the rollers as necessary, wiping, rotating, and repeating until the surfaces of each are clean. Allow to dry.

2.1.4 Cleaning the Ribbon Path

Ribbon path components contaminated with ink buildup and grit can inhibit smooth flow and result in wrinkling related problems. Clean the ribbon path compon ents as follows:

1. Turn OFF the Power Switch and unplug the power cord from the AC Receptacle.

2. Raise the Cover. Remove media and ribbon.

2-7

Adjustments and Maintenance

3. Using a Cotton Swab (or lint-free cloth) dampened with isopropyl alcohol, wipe the Ribbon Idler and Ribbon Post clean.

4. Using a Cotton Swab (or lint-free cloth) dampened with isopropyl alcohol, wipe the Ribbon Shield clean. Allow to dry.

2-8

Adjustments and Maintenance

2.2 Media Sensor Calibration

This printer can use many different media compositions, configurations and colors. In

addition to adjusting the Media Sensor and selecting the SENSOR TYPE, to ensure that each label is detected correctly and reliably, calibration is required. Depending upon th e printer type, there are different calibration methods.

2.2.1 Calibrating Non-Display Models

In Calibration Mode, button functions adjust the Media Sensor to the media being used. Calibration can be performed either automatically or manually, as detailed below.



Notes: Printer faults remain disabled during calibration, but can still occur while printing

Test Labels. Also, if needed, factory defaults can be restored.

2.2.1.1 Automatic Calibration

Automatic Calibration lets the printer establish the optimum media sensing values, as follows:



Note: Before calibrating ensure that media is loaded, and that the Media Sensor

selected and positioned. Also, be sure that the printhead assembly is latched and that the cover is closed.

1. Turn OFF the printer.

2. Depress and hold CANCEL while turning ON the printer. Continue to hold the button until the STOP Light turns OFF.

3. Press PAUSE. About ten inches of media will be output during the process.

4. Upon completion, one of the following lights will flash fiv e t imes t o denote the result:

• STOP Light

= Successful calibration. Go to Step 5, below.

• ERROR Light



Note: To discard calibration changes and revert to the previous settings, turn OFF the

printer before performing Step 5.

= Unsuccessful calibration. Retry and if unsuccessful, see Section 2.2.1.2.

2-9

Adjustments and Maintenance

5. Simultaneously press PAUSE and CANCEL briefly. Wait until the STOP Light goes OFF.

The printer is ready for operation.

2.2.1.2 Manual Calibration

Manual Calibration should be used if Automatic Calibration f a ils, or in cases where sensing problems continue to occur. Proceed as follows to manually calibrate th e Media Sensor:



Note: Before calibrating, be sure that the Media Sensor selected and positioned. Also,

be sure that the printhead assembly is latched and that the cover is closed.

1. Turn OFF the printer and remove the media.

2. Press and hold CANCEL while turning ON the printer. Continue to hold the button until the STOP Light turns OFF.

3. Press and hold FEED until the STOP Light turns ON.

4. Press CANCEL. The ERROR Light will flash as “empty” is analyzed.

5. Position the backing material (or, if using reflective media, the black mark) in the Media Sensor. Close the printhead assembly and press FEED. The ERROR Light will flash as

“Top of Form” is analyzed.

6. Place the media with the backing attached (or, if using reflective media, an area other than the black mark) in the Media Sensor. Close the printhead assembly and press PAUSE. The ERROR Light will flash as “label” is analyzed.

7. Simultaneously press PAUSE and CANCEL briefly, and then one of the following lights will flash five times to denote the calibration result:

• STOP Light

= Successful calibration. Go to Step 8, below.

• ERROR Light

= Unsuccessful calibration. Retry.

2-10

Adjustments and Maintenance

8. Install media. Test the calibration by pressing FEED. A label should feed from the printer. Press CANCEL. A Test Label should be produced.



Note: To discard calibration changes and revert to the previous settings, turn OFF the

printer before performing Step 9.

9. Simultaneously press PAUSE and CANCEL briefly. Wait until the STOP Light goes OFF.

The printer is ready for operation.

2.2.2 Calibrating Display-Equipped Models

Three different calibration methods are available.

2.2.2.1 Quick Calibration

This is the easiest calibration method.



Note: Quick Calibration is not required for continuous media. If UNCALIBRATED is

displayed, use Standard Calibration (Section 2.2.2.2).

Perform a Quick Calibration as follows:

1. Ensure that media is loaded, that the Media Sensor is adjusted, and that the printer is idle.

2. Press and hold FEED.

The printer will begin advancing media; allow at least one label gap or mark to pass through the sensor. Upon successful completion, CALIBRATION COMPLETE will be displayed, as the label is advanced to the next TOF and READY appears. (WARNING LOW BACKING may appear if using notched media or media on a transparent liner; however, the calibration was successful).



Note: Media with large TOF spaces may require a change in the PAPER EMPTY

DISTANCE.

2-11

Adjustments and Maintenance

Calibration Hints:

In certain cases, the printer may have trouble differentiating between the label and liner.

If CANNOT CALIBRATE is displayed, or if the printer stops feeding mid-label, try the following:

 Press and hold FEED to allow two gaps (or marks) to pass through under the sensor.

If CANNOT CALIBRATE is displayed again, or if the printer stops feeding mid-label, try the following:

 Press and hold FEED to allow three or more gaps (or marks) to pass through the

sensor. If this method fails, use Standard Calibration (see Section 2.2.2.2).

2.2.2.2 Standard Calibration

During the Standard Calibration process, the printhead assembly can be raised for visual access to the media and the sensor. In addition, displayed sensor readings can be used to indicate the best position over the media. These features are helpful when using small, position-critical TOF notches or marks. Three readings are required:

• Empty: No media in the sensor;

• Gap (or Mark): Only the backing, notch, or reflective mark in the sensor; and,

• Paper: The label (with the liner attached) in the sensor.

Make sure the SENSOR TYPE has been selected. Then, perform the Standard Calibration

steps:



Note: The procedure below assumes that the ADVANCED MENU is selected.

Step Action Displayed Message Comment

1 Turn ON the printer. UNCALIBRATED

(continued)

Wait briefly for initialization before proceeding.

2-12

Adjustments and Maintenance

Step Action Displayed Message Comment

Press MENU and then

raise the printhead assembly.

3 Press ENTER.

Scroll to SENSOR

CALIBRATION and press ENTER.

Press ENTER, and then

to proceed press YES.

Remove the media

from the Media Sensor and then press ESC.

Proceed according to the media type, and then press ESC:

• Die-cut: Peel labels

from the backing. Insert the backing under the Sensor Eye Mark;

• Notched: Insert the

notch under the Sensor Eye Mark; or,

• Reflective: Insert the

black mark facedown under the Sensor Eye Mark.

• Continuous: Go to

Step 8.

ADVANCED MENU MEDIA SETTINGS

MEDIA SETTINGS

MEDIA TYPE

SENSOR CALIBRATION

PERFORM CALIBRATION

PERFORM CALIBRATION?

PERFORM CALIBRATION

REMOVE LABEL STOCK

PRESS ESC KEY

yyy

PERFORM CALIBRATION

SCAN BACKING PRESS ESC KEY

yyy

You are in the ADVANCED

MENU.

You are entering MEDIA SETTINGS.

Press EXIT to leave this procedure.

Press NO to exit.

This sets the “empty”

parameter, where yyy is a numeric value representing the current sensor reading.

For reflective media, SCAN MARK will be indicated.

This sets the TOF parameter, where yyy is a numeric value representing the current sensor reading.

Never position a perforation under the sensor when sampling.

(continued)

2-13

Adjustments and Maintenance

Step Action Displayed Message Comment

Position a label (with

backing, if any) under the Sensor Eye Mark, and then press ESC.

Observe the message.

10 Press ESC and then

EXIT. Load media. Adjust the Media Sensor.

Press and hold FEED until at least one label has been output.

PERFORM CALIBRATION

SCAN PAPER

PRESS ESC KEY

yyy

PERFORM CALIBRATION

GAP MODE

CALIBRATION COMPLETE

yyy

READY

This sets the parameter for the paper value, where yyy is a numerical value representing the current sensor reading.

If using preprinted media, ensure the label area under the sensor is free of preprinted text, graphics or borders.

The calibration result is given. For reflective media,

REFLECTIVE MODE will be indicated, and for continuous media, CONTINUOUS MODE.

If other than Complete is displayed, see the note below.

The printer is calibrated. If another message is

displayed, see the note below.



Notes: (1) When calibrating notched media or media on a transparent liner, WARNING

LOW BACKING is normal message; and, (2) If CALIBRATION UNSUCCESSFUL appears, see Section 2.2.2.3.

2-14

Adjustments and Maintenance

2.2.2.3 Advanced Entry Calibration



Note: Advanced Entry Calibration should only be used if needed, after trying

Standard Calibration.

Advanced Entry is an alternate calibration method for special-case media. This procedure consists of two parts: (1) compiling sensor readings using different algorithms; and, (2) determining the best algorithm then sampling and entering the values. Make sure that the SENSOR TYPE has been selected and then proceed with the steps below:

Step Action Displayed Message Comment

1 Turn ON the printer. UNCALIBRATED

Press MENU and then

raise the printhead assembly.

3 Press ENTER.

Scroll to SENSOR

CALIBRATION and press ENTER.

Scroll to ADVANCED

ENTRY and press ENTER.

Scroll to TRAN SENSOR GAIN (for die-cut media) or REFL

SENSOR GAIN (for reflective media) then press ENTER.

ADVANCED MENU MEDIA SETTINGS

MEDIA SETTINGS

MEDIA TYPE

SENSOR CALIBRATION

PERFORM CALIBRATION

ADVANCED ENTRY

PAPER SENSOR LEVEL

TRAN SENSOR GAIN

yyy (0 - 31)

Wait briefly for initialization

before proceeding.

You are in the ADVANCED MENU.

You are entering MEDIA SETTINGS.

Press EXIT to leave this procedure.

You are entering the advanced procedure.

Press ESC to abort this procedure. (The following examples detail die-cut media calibration, and unless otherwise noted the reflective media procedure is the same.)

Install media. Position the Sensor Eye Mark

over the label, then lower and latch the printhead assembly.

(continued)

TRAN SENSOR GAIN yyy (0 - 31) 25

2-15

Do not position a perforation in the Media Sensor; and if using preprinted media, ensure the label area placed in the sensor is free of text, graphics, lines, etc.

Adjustments and Maintenance

Step Action Displayed Message Comment

Use the buttons to set

the Gain Number to 00 and then press ENTER.

Record the sensor

reading as a Label Value for Gain Number 00 in a table (32 rows

TRAN SENSOR GAIN yyy (0 - 31)

This is the Label Value for a gain setting of 00, where “yyy” represents the current sensor reading.

by four columns, with headings similar to those shown below.)

Sample Calibration Table

Gain Number Label Value TOF Value Difference Value

00 252 01 02

…

Step Action Displayed Message Comment

Use the buttons to

increment the Gain Number by one and

then press ENTER. Record the Label Value. Repeat this process for

TRAN SENSOR GAIN yyy (0 - 31)

Remaining Label Values,

where “yyy” represents the current sensor reading.

each Gain Number.

Sample Calibration Table

Gain Number Label Value TOF Value Difference Value

00 252 01 250 02 248

……

31 09

(continued)

2-16

Adjustments and Maintenance

Step Action Displayed Message Comment

Raise the printhead

assembly then proceed according to the media type:

• Die-cut: Peel labels

from the backing then insert the backing under the

Sensor Eye Mark;

• Notched: Insert the

notch under the Sensor Eye Mark; or,

TRAN SENSOR GAIN yyy (0 - 31)

Do not position a perforation

in the Media Sensor; and if using preprinted media, ensure the label area placed in the sensor is free of text,

graphics, lines, etc.

• Reflective: Insert the

black mark facedown under the Sensor Eye Mark.

Lower and latch the printhead assembly.

Set the Gain Number to 00 and then press

ENTER. Record the reading as a

TOF Value for Gain Number 00 in the table.

Gain Number Label Value TOF Value Difference Value

00 252 248 01 250 02 248

……

31 09

TRAN SENSOR GAIN yyy (0 - 31)

Sample Calibration Table

This is the TOF Value for a gain setting of 00, where “yyy” represents the current sensor reading.

(continued)

2-17

Adjustments and Maintenance

Step Action Displayed Message Comment

Increment the Gain Number by one and then press ENTER.

Record the TOF Value. Repeat this process for each Gain Number.

Gain Number Label Value TOF Value Difference Value

00 252 248 01 250 245 02 248 234

………

31 09 14

TRAN SENSOR GAIN yyy (0 - 31)

Sample Calibration Table

Remaining TOF Values, where “yyy” represents the current sensor reading.

Step Action Displayed Message Comment

Calculate the best Gain Setting. In your sample calibration table. Where both the Label Value and TOF Value are at least 20, subtract the amounts and record the result as a

Difference Value (see below).

TRAN SENSOR GAIN yyy (0 - 31)

In this example, Gain Number

18 is chosen because, where both values are at least twenty, it has the highest

Difference Value. Identify the largest Difference Value and its corresponding Gain Number. This Gain Number will be used to resample the media.

Gain Number Label Value TOF Value Difference Value

00 252 248 4 01 250 245 5 02 248 234 14

………… 15 188 63 125 16 184 51 133 17 179 38 141 18 174 25 149 19 170 19 N/A

………… 31 132 14 N/A

(continued)

Sample Calibration Table

2-18

Adjustments and Maintenance

Step Action Displayed Message Comment

Use the buttons to set the Gain Number determined

in the previous step. Press ENTER to enable the setting.

Make another table (see example below) using new measurements:

(A) Raise the printhead

assembly. Place the label under the Sensor Eye Mark then latch the printhead assembly. Record the sensor value as P.

(B) Raise the printhead

assembly. Place the backing, notch or mark under the Sensor Eye Mark. Latch the printhead assembly. Record the sensor value as G (or M).

TRAN SENSOR GAIN

yyy (0 - 31)

TRAN SENSOR GAIN

yyy (0 - 31)

This example uses Gain

Number 18.

Where “yyy” is a numerical value representing the current sensor reading.

The re-sampled values may differ from those previously noted.

(continued)

assembly. Remove media. Latch the printhead assembly. Record the sensor value as E.

Selected Gain Table

Gain Number Paper Gap (or Mark) Empty

18 173 42 9

2-19

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Datamax M-Class Mark II Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual