Ricoh M126 User manual

M126/M127/M128
SERVICE MANUAL

It is the reader's responsibility when discussing the information contained
within this document to maintain a level of confidentiality that is in the best
interest of Ricoh Americas Corporation and its member companies.
NO PART OF THIS DOCUMENT MAY BE REPRODUCED IN ANY
FASHION AND DISTRIBUTED WITHOUT THE PRIOR
PERMISSION OF RICOH AMERICAS CORPORATION.
All product names, domain names or product illustrations, including
desktop images, used in this document are trademarks, registered
trademarks or the property of their respective companies.
They are used throughout this book in an informational or editorial fashion
only and for the benefit of such companies. No such use, or the use of
any trade name, or web site is intended to convey endorsement or other
affiliation with Ricoh products.
2011 RICOH Americas Corporation. All rights reserved.

The Service Manual contains information
regarding service techniques, procedures,
processes and spare parts of office equipment
distributed by Ricoh Americas Corporation.
Users of this manual should be either service
trained or certified by successfully completing a
Ricoh Technical Training Program.
Untrained and uncertified users utilizing
information contained in this service manual to
repair or modify Ricoh equipment risk personal
injury, damage to property or loss of warranty
protection.
Ricoh Americas Corporation
WARNING

LEGEND
PRODUCT
CODE COMPANY
LANIER RICOH SAVIN
M126 NA NA NA
M127 SP 4410SF Aficio SP 4410SF SP 4410SF
M128 NA NA NA
*NA- Not Available
DOCUMENTATION HISTORY
REV. NO.
DATE
COMMENTS
*
11/2011
Original Printing

SM i M126/M127/M128
M126/M127/M128
TABLE OF CONTENTS
1. PRODUCT INFORMATION...........................................................1-1
1.1 GENERAL INFORMATION........................................................................ 1-1
1.2 LOCATIONS.............................................................................................. 1-2
1.2.1 FRONT VIEW ................................................................................... 1-2
1.2.2 REAR VIEW...................................................................................... 1-3
1.3 OVERVIEW................................................................................................ 1-4
1.4 MAIN BOARDS.......................................................................................... 1-5
1.4.1 CONTROLLER BOARD.................................................................... 1-5
1.4.2 ENGINE BOARD .............................................................................. 1-6
1.4.3 CONTROLLER AND ENGINE BOARD CONNECTOR PIN VALUES1-7
2. INSTALLATION.............................................................................2-1
2.1 INSTALLATION ......................................................................................... 2-1
3. PREVENTIVE MAINTENANCE.....................................................3-1
3.1 SAFETY INSPECTION GUIDE.................................................................. 3-1
3.2 LUBRICATION SPECIFICATIONS............................................................ 3-1
4. REPLACEMENT AND ADJUSTMENT.........................................4-1
4.1 HANDLING ESD-SENSITIVE PARTS ....................................................... 4-1
4.2 REMOVAL PROCEDURES ....................................................................... 4-2
4.2.1 ACM PICK TIRE ROLLER REMOVAL.............................................. 4-3
4.2.2 CARD READER REMOVAL ............................................................. 4-4
4.2.3 UPPER AND LOWER CARD READER COVER REMOVAL............ 4-5
4.2.4 CARD READER CABLE REMOVAL................................................. 4-6
4.2.5 CONTROLLER BOARD REMOVAL................................................. 4-7
4.2.6 CONTROLLER BOARD SHIELD.................................................... 4-10
4.2.7 CONTROLLER BOARD CAGE ...................................................... 4-12
4.2.8 CONTROLLER BOARD FAN ......................................................... 4-12
4.2.9 ENGINE BOARD REMOVAL.......................................................... 4-13
4.2.10 COVER OPEN SENSOR............................................................ 4-13
4.2.11 DOOR MOUNT REMOVAL ........................................................ 4-14
4.2.12 DUPLEX REMOVAL................................................................... 4-16

M126/M127/M128 ii SM
4.2.13 DUPLEX/MAIN MOTOR GEAR DRIVE INTERFACE REMOVAL4-17
4.2.14 FAN REMOVAL.......................................................................... 4-20
4.2.15 FRONT ACCESS DOOR REMOVAL ......................................... 4-21
4.2.16 FUSER REMOVAL..................................................................... 4-23
4.2.17 SCANNER FRONT COVER REMOVAL..................................... 4-25
4.2.18 LEFT SIDE COVER REMOVAL ................................................. 4-26
4.2.19 FRONT DOOR ACCESS COVER REMOVAL............................ 4-27
4.2.20 LOWER FRONT COVER REMOVAL......................................... 4-28
4.2.21 LVPS/HVPS REMOVAL ............................................................. 4-30
4.2.22 MAIN MOTOR GEAR DRIVE REMOVAL................................... 4-33
4.2.23 MANUAL FEED CLUTCH REMOVAL ........................................ 4-35
4.2.24 MANUAL FEED SOLENOID REMOVAL .................................... 4-37
4.2.25 MEDIA ACM ASM FEEDER REMOVAL..................................... 4-39
4.2.26 MEDIA FEED CLUTCH WITH CABLE REMOVAL..................... 4-42
4.2.27 MEDIA MANUAL INPUT SENSOR............................................. 4-44
4.2.28 MULTIPURPOSE FEEDER REMOVAL...................................... 4-47
4.2.29 MULTIPURPOSE FEEDER (MPF) FEED CLUTCH REMOVAL. 4-49
4.2.30 NAMEPLATE COVER REMOVAL.............................................. 4-50
4.2.31 OPERATOR PANEL KEYPAD REMOVAL................................. 4-51
4.2.32 OPERATOR PANEL DISPLAY REMOVAL ................................ 4-52
4.2.33 DISPLAY BEZEL ........................................................................ 4-53
4.2.34 UICC CABLE REMOVAL............................................................ 4-54
4.2.35 USB CABLE MOUNT BRACKET REMOVAL ............................. 4-55
4.2.36 OPERATOR PANEL SUPPORT REMOVAL.............................. 4-55
4.2.37 DISPLAY ROTATION SUPPORT REMOVAL ............................ 4-56
4.2.38 LEFT REAR FRAME ASSEMBLY REMOVAL............................ 4-56
4.2.39 RIGHT REAR FRAME ASSEMBLY REMOVAL ......................... 4-58
4.2.40 TUB ASSEMBLY REMOVAL...................................................... 4-59
4.2.41 PAPER INPUT AND DUPLEX SENSOR ASSEMBLY REMOVAL4-60
4.2.42 PRINTHEAD REMOVAL............................................................. 4-61
4.2.43 MID REAR COVER REMOVAL.................................................. 4-62
4.2.44 REAR DOOR AND LOWER REAR COVER REMOVAL ............ 4-63
4.2.45 REAR EXIT GUIDE ASSEMBLY WITH SENSOR AND REVERSING
SOLENOID REMOVAL............................................................................ 4-64
4.2.46 RIGHT SIDE COVER REMOVAL............................................... 4-66
4.2.47 TONER LEVEL SENSOR REMOVAL ........................................ 4-68
4.2.48 TOP COVER ASSEMBLY REMOVAL........................................ 4-69
4.2.49 TRANSFER ROLL REMOVAL.................................................... 4-69

SM iii M126/M127/M128
4.2.50 UPPER FRONT GUIDE ASSEMBLY REMOVAL....................... 4-71
4.2.51 WEAR STRIP (TRAY 1 AND 250-SHEET TRAY 2) REMOVAL. 4-71
4.2.52 WEAR STRIP (550-SHEET TRAY 2) REMOVAL....................... 4-72
4.3 IMAGING COMPONENT REMOVALS .................................................... 4-73
4.3.1 ADF UNIT REMOVAL..................................................................... 4-73
4.3.2 FLATBED REMOVAL..................................................................... 4-74
4.3.3 SCANNER ASSEMBLY REMOVAL................................................ 4-76
4.3.4 ADF SEPARATOR PAD ................................................................. 4-81
4.3.5 ADF SEPARATOR ROLL ASSEMBLY........................................... 4-82
4.3.6 KICKSTAND REMOVAL................................................................. 4-83
4.3.7 OUTPUT BIN LED AND LENS REMOVAL..................................... 4-84
4.3.8 ADF CABLE REMOVAL ................................................................. 4-85
4.3.9 LEFT SCANNER COVER REMOVAL ............................................ 4-86
4.3.10 RIGHT SCANNER COVER REMOVAL...................................... 4-87
4.4 OPTION BOARD INSTALLATION AND REMOVAL................................ 4-88
4.4.1 LIFTING THE SCANNER TO THE UP POSITION ......................... 4-88
4.4.2 INSTALLING AN INTERNAL SOLUTIONS PORT (ISP)................. 4-89
4.4.3 PRINTER HARD DISK REMOVAL................................................. 4-92
4.4.4 PRINTER HARD DISK INSTALLATION ON AN ISP...................... 4-94
4.4.5 PRINTER HARD DISK INSTALLATION DIRECTLY ON THE
CONTROLLER BOARD........................................................................... 4-96
4.4.6 FAX CARD INSTALLATION ........................................................... 4-98
5. SYSTEM MAINTENANCE.............................................................5-1
5.1 ACCESSING SERVICE MENUS ............................................................... 5-1
5.2 CONFIGURATION MENU (CONFIG MENU)............................................. 5-2
5.2.1 AVAILABLE MENUS......................................................................... 5-2
5.2.2 MAINTENANCE COUNT VALUE (MAINT CNT VALUE).................. 5-5
5.2.3 RESET MAINTENANCE COUNTER................................................ 5-6
5.2.4 RESET PHOTOCONDUCTOR MAINTENANCE COUNTER (RESET PC
CNT)5-6
5.2.5 USB SCAN TO LOCAL..................................................................... 5-7
5.2.6 PRINT QUALITY PAGES ................................................................. 5-7
Menu settings page.............................................................................. 5-7
Event log.............................................................................................. 5-7
5.2.7 PANEL MENUS................................................................................ 5-8
5.2.8 PPDS EMULATION.......................................................................... 5-9
5.2.9 DOWNLOAD EMULS ..................................................................... 5-10
5.2.10 FACTORY DEFAULTS............................................................... 5-10

M126/M127/M128 iv SM
5.2.11 ENERGY CONSERVE ............................................................... 5-11
5.2.12 MIN COPY MEMORY................................................................. 5-11
5.2.13 NUM PAD JOB ASSIST.............................................................. 5-11
5.2.14 FORMAT FAX STORAGE.......................................................... 5-12
5.2.15 FAX STORAGE LOCATION....................................................... 5-12
5.2.16 ADF EDGE ERASE .................................................................... 5-12
5.2.17 FB EDGE ERASE....................................................................... 5-13
5.2.18 SCANNER MANUAL REGISTRATION ...................................... 5-13
5.2.19 DISABLE SCANNER.................................................................. 5-14
5.2.20 PAPER PROMPTS..................................................................... 5-15
5.2.21 ENVELOPE PROMPTS.............................................................. 5-15
5.2.22 ACTION FOR PROMPTS........................................................... 5-15
5.2.23 JOBS ON DISK........................................................................... 5-16
5.2.24 DISK ENCRYPTION................................................................... 5-16
5.2.25 WIPE DISK................................................................................. 5-19
5.2.26 FONT SHARPENING ................................................................. 5-20
5.2.27 REQUIRE STANDBY ................................................................. 5-21
5.2.28 LES APPLICATIONS.................................................................. 5-21
5.2.29 KEY REPEAT INITIAL DELAY ................................................... 5-21
5.2.30 KEY REPEAT RATE................................................................... 5-22
5.2.31 WIPER MESSAGE ..................................................................... 5-22
5.2.32 CLEAR CUSTOM STATUS........................................................ 5-22
5.2.33 USB SPEED ............................................................................... 5-22
5.2.34 USB PNP.................................................................................... 5-23
5.2.35 EXIT CONFIGURATION MENU (EXIT CONFIG MENU) ........... 5-23
5.3 DIAGNOSTICS MENU............................................................................. 5-24
5.3.1 ENTERING DIAGNOSTICS MENU................................................ 5-24
Available tests.................................................................................... 5-24
5.3.2 REGISTRATION (PRINTER).......................................................... 5-25
Quick test page .................................................................................. 5-27
5.3.3 PRINT TESTS ................................................................................ 5-27
Input sources...................................................................................... 5-27
Print quality pages (Prt Quality Pgs)................................................... 5-28
5.3.4 HARDWARE TESTS ...................................................................... 5-28
Panel test........................................................................................... 5-29
Button test.......................................................................................... 5-29
DRAM test.......................................................................................... 5-29
Serial 1 wrap ...................................................................................... 5-30

SM v M126/M127/M128
USB HS test mode............................................................................. 5-30
5.3.5 DUPLEX TESTS............................................................................. 5-31
Quick test (duplex) ............................................................................. 5-31
Top margin (duplex)........................................................................... 5-32
Sensor test (duplex)........................................................................... 5-32
Motor test (duplex) ............................................................................. 5-33
Duplex feed 1..................................................................................... 5-33
Duplex feed 2..................................................................................... 5-34
5.3.6 INPUT TRAY TESTS...................................................................... 5-34
Feed tests (input tray) ........................................................................ 5-34
Sensor test (input tray)....................................................................... 5-35
5.3.7 OUTPUT BIN TESTS...................................................................... 5-36
Feed tests (output bins)...................................................................... 5-36
Sensor test (standard output bin)....................................................... 5-36
5.3.8 BASE SENSOR TEST.................................................................... 5-37
5.3.9 DEVICE TESTS.............................................................................. 5-37
Quick disk test.................................................................................... 5-37
Disk Test/Clean.................................................................................. 5-38
5.3.10 PRINTER SETUP....................................................................... 5-38
Defaults.............................................................................................. 5-39
Printed page count............................................................................. 5-39
Permanent page count....................................................................... 5-39
Serial number..................................................................................... 5-39
Engine settings 1 through 4................................................................ 5-39
Model name ....................................................................................... 5-39
Configuration ID................................................................................. 5-40
Edge to edge...................................................................................... 5-41
Enable edge to edge copy.................................................................. 5-41
5.3.11 EP SETUP.................................................................................. 5-41
EP defaults......................................................................................... 5-41
Fuser temperature (Fuser temp) ........................................................ 5-41
Fuser page count............................................................................... 5-42
Warm up time..................................................................................... 5-42
Transfer.............................................................................................. 5-42
Print contrast...................................................................................... 5-42
Charge roll.......................................................................................... 5-42
Gap adjust.......................................................................................... 5-42
Auto dark adjust ................................................................................. 5-42

M126/M127/M128 vi SM
5.3.12 REPORTS .................................................................................. 5-43
Menu settings page............................................................................ 5-43
5.3.13 EVENT LOG............................................................................... 5-43
Display log.......................................................................................... 5-43
Print log.............................................................................................. 5-43
Clear log............................................................................................. 5-44
5.3.14 SCANNER TESTS...................................................................... 5-45
ASIC test............................................................................................ 5-45
Feed test............................................................................................ 5-45
Sensor tests....................................................................................... 5-45
5.3.15 EXIT DIAGNOSTICS.................................................................. 5-47
5.4 PRINTHEAD ASSEMBLY ELECTRONIC ADJUSTMENT....................... 5-48
5.5 PRINTHEAD ASSEMBLY MECHANICAL ADJUSTMENT....................... 5-50
5.6 SE MENU................................................................................................. 5-52
5.6.1 GENERAL....................................................................................... 5-52
5.6.2 CODE REVISION INFO.................................................................. 5-52
5.6.3 HISTORY........................................................................................ 5-52
5.6.4 MAC................................................................................................ 5-52
5.6.5 NVRAM........................................................................................... 5-53
5.6.6 NPAP.............................................................................................. 5-53
5.6.7 TCP/IP............................................................................................ 5-53
6. TROUBLESHOOTING...................................................................6-1
6.1 START....................................................................................................... 6-1
6.1.1 SYMPTOM TABLES......................................................................... 6-1
6.1.2 SERVICE ERRORS (8XX.XX / 9XX.XX’S) ....................................... 6-1
6.1.3 USER STATUS AND ATTENDANCE MESSAGES.......................... 6-1
6.2 POWER–ON SELF TEST (POST) SEQUENCE........................................ 6-2
6.3 SYMPTOM TABLES.................................................................................. 6-3
6.3.1 POST SYMPTOM TABLE................................................................. 6-3
6.3.2 PRINTER SYMPTOM TABLE........................................................... 6-4
6.3.3 SCAN / FAX / COPY SYMPTOM TABLE ......................................... 6-6
6.4 MESSAGES AND ERROR CODES........................................................... 6-8
6.4.1 USER ATTENDANCE MESSAGES.................................................. 6-8
User status and attendance messages................................................ 6-8
6.4.2 CARTRIDGE ERROR MESSAGES................................................ 6-21
6.4.3 PAPER JAM ERROR CODES (200-SERIES) ................................ 6-22
6.4.4 SERVICE ERROR CODES ............................................................ 6-34
6.4.5 FAX ERROR CODES..................................................................... 6-44

SM vii M126/M127/M128
Fax error log codes............................................................................ 6-44
6.5 SERVICE CHECKS ................................................................................. 6-50
6.5.1 CONTROLLER BOARD SERVICE CHECK ................................... 6-50
Controller board service check........................................................... 6-50
6.5.2 ENGINE BOARD SERVICE CHECK.............................................. 6-52
Engine board service check............................................................... 6-52
6.5.3 CARD READER SERVICE CHECK................................................ 6-55
6.5.4 COOLING FAN SERVICE CHECK................................................. 6-55
6.5.5 COVER INTERLOCK SWITCH SERVICE CHECK ........................ 6-56
6.5.6 DEAD MACHINE SERVICE CHECK.............................................. 6-57
6.5.7 FUSER SERVICE CHECK ............................................................. 6-58
Fuser service check........................................................................... 6-58
6.5.8 LVPS/HVPS SERVICE CHECK...................................................... 6-59
6.5.9 MAIN MOTOR SERVICE CHECK .................................................. 6-60
6.5.10 NETWORKING SERVICE CHECK............................................. 6-61
6.5.11 OPERATOR PANEL SERVICE CHECK..................................... 6-64
Touch screen operator panel service check....................................... 6-64
6.5.12 PAPER FEED SERVICE CHECKS ............................................ 6-65
Paper jam error indication during POST............................................. 6-65
Media picks but stops halfway through the machine.......................... 6-66
Media never picks.............................................................................. 6-67
Media occasionally mispicks or picks multiple sheets at once ........... 6-67
Media skews ...................................................................................... 6-68
Media “trees,” wrinkles, stacks poorly, or curls................................... 6-69
6.5.13 OPTION CARD SERVICE CHECK............................................. 6-70
Option card service check.................................................................. 6-70
6.5.14 USB PORT SERVICE CHECK................................................... 6-70
6.5.15 PRINT QUALITY SERVICE CHECKS........................................ 6-71
Using print quality test pages............................................................. 6-71
Blank page......................................................................................... 6-72
Black page ......................................................................................... 6-73
Heavy background............................................................................. 6-74
Partial blank image/white spots (no repeating pattern)....................... 6-74
Variation in image density horizontally across page........................... 6-75
Poor fusing of image .......................................................................... 6-75
Light print ........................................................................................... 6-76
White or black lines or bands............................................................. 6-76
Toner on back of page ....................................................................... 6-77

M126/M127/M128 viii SM
Print quality problems......................................................................... 6-78
6.5.16 PRINTHEAD SERVICE CHECK................................................. 6-84
6.5.17 TRANSFER ROLL SERVICE CHECK........................................ 6-85
6.5.18 TRAY 2 SERVICE CHECK......................................................... 6-85
6.5.19 840.XX SERVICE CHECK.......................................................... 6-86
6.5.20 BLACK OR BLANK PAGE COPY SERVICE CHECK................. 6-89
6.5.21 CCD SERVICE CHECK.............................................................. 6-90
6.5.22 FLATBED MOTOR SERVICE CHECK....................................... 6-90
6.5.23 FLATBED HOME POSITION SERVICE CHECK........................ 6-91
6.5.24 ADF COVER OPEN SERVICE CHECK...................................... 6-92
6.5.25 ADF STREAK SERVICE CHECK............................................... 6-93
6.5.26 ADF PAPER JAM SERVICE CHECK......................................... 6-94
6.5.27 ADF FEED ERRORS SERVICE CHECK.................................... 6-96
6.5.28 ADF DUPLEX SERVICE CHECK............................................... 6-98
6.5.29 MODEM / FAX CARD SERVICE CHECK................................... 6-99
6.5.30 FAX TRANSMISSION SERVICE CHECK ................................ 6-100
6.5.31 FAX RECEPTION SERVICE CHECK....................................... 6-103
6.5.32 ESCALATING A FAX ISSUE TO SECOND-LEVEL SUPPORT6-106
6.6 PAPER JAMS ........................................................................................ 6-108
6.6.1 AVOIDING JAMS.......................................................................... 6-108
6.6.2 UNDERSTANDING JAM NUMBERS AND LOCATIONS ............. 6-109
6.6.3 JAM MESSAGES AND THEIR LOCATIONS................................ 6-110
200 and 201 paper jams................................................................... 6-110
202 paper jam.................................................................................. 6-112
231 paper jam.................................................................................. 6-113
233 paper jam.................................................................................. 6-114
234 paper jam.................................................................................. 6-115
235 paper jam.................................................................................. 6-115
240 - 249 paper jams ....................................................................... 6-116
250 paper jam.................................................................................. 6-117
251 paper jam.................................................................................. 6-118
290-294 paper jams ......................................................................... 6-119
7. ENERGY SAVING .........................................................................7-1
7.1 ENERGY SAVE ......................................................................................... 7-1
7.1.1 ENERGY SAVER MODES ............................................................... 7-1
7.2 PAPER SAVE ............................................................................................ 7-2
7.2.1 EFFECTIVENESS OF DUPLEX/COMBINE FUNCTION.................. 7-2
1. Duplex:............................................................................................. 7-2

SM ix M126/M127/M128
2. Combine mode:................................................................................ 7-2
3. Duplex + Combine:........................................................................... 7-2

Read This First
Safety Notices
The following laser notice labels may be attached to this machine.

Symbols, Abbreviations and Trademarks
This manual uses several symbols and abbreviations. The meaning of those symbols and
abbreviations are as follows:
See or Refer to
Clip ring
Screw
Connector
Clamp
E-ring
SEF Short Edge Feed
LEF Long Edge Feed
Trademarks
Microsoft®, Windows®, and MS-DOS®are registered trademarks of Microsoft Corporation in the
United States and /or other countries.
PostScript®is a registered trademark of Adobe Systems, Incorporated.
PCL®is a registered trademark of Hewlett-Packard Company.
Ethernet®is a registered trademark of Xerox Corporation.
PowerPC®is a registered trademark of International Business Machines Corporation.
Other product names used herein are for identification purposes only and may be trademarks of
their respective companies. We disclaim any and all rights involved with those marks.

Acronyms
ac Alternating Current
ACM Autocompensator Mechanism (or paper feed)
ADF Automatic document feeder
AFE Analog front end
AIO All-In-One
APS Automatic Paper Size
ASIC Application Specific Integrated Circuit
BLDC Brushless DC Motor
BOR Black Only Retract
CCD Charge-Couple Device
CCFL Cold Cathode Fluorescent Lamp
CCW Counter clockwise
CDB Command Descriptor Blocks
CMYK Cyan yellow magenta black
CPU Central processing unit
CRC Cyclic redundancy check
CRU Customer Replaceable Unit
CSU Customer Setup
CW Clockwise
DBCS Double byte character set
dc Direct Current
DIMM Dual Inline Memory Module
DLE Downloadable emulator

DRAM Dynamic random access memory
DVM Digital multimeter
ECC Error correcting code
ECM Error correction mode
EDO Enhanced Data Out
EEPROM Electrical Erasable Programmable Read-Only
Memory
ENA External Network Adapter
EOL End of line
EP Electrophotographic process
EPROM Erasable programmable read-only memory
ESD Electrostatic Discharge
FB Flatbed
FD Facedown
FRU Field replaceable unit
FU Face up
GB Gigabyte
GFI Ground Fault Interrupter
GHz Gigahertz
HBP Host Based Printing
HCF High-capacity feeder
HCIT High-capacity Input Tray
HCOF High-Capacity Output Finisher
HCPF High-capacity feeder
HTML Hypertext markup language

HV High Voltage
HVPS High voltage power supply
HVU High voltage unit
Hz Hertz
INTL International
ITC Internal Tray Card
ITU Image Transfer Unit
K Black (Key)
LAN Local area network
LASER Light amplification by stimulated emission of
radiation
LCD Liquid crystal display
LCM Liquid Crystal Module
LD Laser Diode
LED Light emitting diode
LEF Long edge feed
LSU Laser Scanning Unit
LV Low Voltage
LVPS Low voltage power supply
MB Megabyte
MDC Motor Driver Control
MFD Multifunction Device
MFP Multifunction Printer
MH Message handling
MIF Motor interface