Oki MICROLINE ML320 User manual

OKI MICROLINE ML320/321
MAINTENANCE MANAUL

PREFACE
This maintenance manual describes field maintenance of the MICROLINE 320/321 printer and
options for maintenance engineers,
For performance specifications and operating procedures, refer to the “User’s Manual”.

TABLE OF CONTENTS
1. CONFIGURATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I-I
1.1
Standard Printer Configuration
........................................... 1-l
1.2
Options
................................................................. l-2
1.3
Specifications
...........................................................
1-4
1.3.1
Printspecifications ....................................................... l-4
1.3.2
Paperspecifications ...................................................... l-5
1.3.3 Physical specifications
....................................................
1-6
1.3.4 Powerrequirements ...................................................... l-6
1.3.5 Environmental conditions
.................................................
1-7
1.3.6
Noise(UTL)
.............................................................. l-7
1.3.7
Agencyapprovals ........................................................ l-7
2. INSTALLATION PROCEDURE
................................................. 2-1
2.1
Unpacking
..............................................................
2-1
2.1.1‘ Unpacking the packing box
................................................
2-1
2.1.2
2.1.3
2.2
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.2.6
2.2.7
Unpacking the printer unit
................................................
2-2
Unpacking the accessories
................................................ 2-3
installation .............................................................. 2-4
Precautionforinstallation ................................................
2-4
....
Removing the shipping retainer
........................................... 2-6
Installing the accessories
:
2-7
...........
......................................
Connectingcables .......................................................
2-8
lnstallingprinterpaper ...................................................
2-9
Turning on the printer
................................................... 2-l 0
Rolling ASCII test pattern
................................................ 2-l 1
3.
OPERATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1
3.1
3.1.1
3.1.2
3.1.3
3.1.4
3.1.5
3.1.6
3.1.7
Electrical Operation
......................................................
3-l
General
................................................................. 3-l
Microprocessor and peripheral circuits
.....................................
3-2
Initialization .............................................................
3-5
Interfacecontrol .........................................................
3-5
Printhead drive circuit
....................................................
3-6
Spacing o.peration
.......................................................
3-7
Line feed operation ......................................................
3-9
i

3.1.8 Alarmcircuits ............................................................
3-9
3.1.9 Paper end detection circuit
..............................................
3-10
3.1.10 Powersupply ..........................................................
3-10
3.2
Mechanical Operation
...................................................
3-l 1
3.2.1
Printhead mechanism and operation
......................................
3-11
3.2.2 Spacingoperation .......................................................
3-14
3.2.3
Head gap adjustment mechanism
........................................
3-l 6
3.2.4 Ribbon drive operation
..................................................
3-18
3.2.5 Paperfeedoperation
.....................................................
3-20
3.2.6 Paperenddetectionmechanism
..........................................
3-28
3.2.7 Semi-automatic sheet feed (SASF) operation
...............................
3-30
3.2.8
Reversing continuous sheets
.............................................
3-33
4. ASSEMBLY/DISASSEMBLY
. . . . . . . . . . . . . . . . . . . . . . . D.. . . . . . . . . ~. . . . . . . . . . . . . . .
4-l
4.1
4.2
4.3
4.3.1
4.3.2
4.3.3
4.3.4
4.3.5
4.3.6
4.3.7
4.3.8
4.3.9
4.3.10
4.3.11
4.3.12
4.3.13
4.3.14
4.3.15
PrecautionsforPartsReplacement .........................................
4-1
MaintenancePools ....................................................... 4-2
Disassembly/Reassembly Procedure
........................................
4-3
Rulerguide .............................................................. 4-4
Printhead ...............................................................
4-5
Uppercoverassembly ..................................................... 4-6
Operatorpanel ..........................................................
4-8
Controlboard ............
..~: .......................................... 4-10
Bailarm
.............................................................
4-12
Basecover
..............................................................
4-13
Supportpanel ..........................................................
Bail bar ................................................................
Transformer ............................................................
Filterassembly ..........................................................
Powersupplyboard .....................................................
Powerinterconnectmoduie ..............................................
Ribbon drive gear assembly
..............................................
Spacemotorassembly ...................................................
4-14
4-15
4-16
4-17
4-18
4-19
4-20
.4-22
ii

5.
6.
7.
4.3.16
4.3.17
4.3.18
4.3.19
4.3.20
4.3.21
4.3.22
4.3.23
4.3.24
4.3.25
4.3.26
4.3.27
4.3.28
4.3.29
4.3.30
4.3.31
Carriageframe ..........................................................
Spacerack ..............................................................
Guiderail ...............................................................
Headcable .............................................................
Platenassembly ........................................................
Ribbonprotector ........................................................
LFmotor ...............................................................
LFmotorinterconnectmodule ............................................
ldlergear ...............................................................
Releaselever ...........................................................
Pressurerollerassembly ..................................................
Tractorassembly ........................................................
Sensorlever .............................................................
Paperendlever .........................................................
Supportspring ..........................................................
4-24
4-25
4-26
4-28
4-28
4-30
4-3 1
4-32
4-33
4-34
4-34
4-36
4-38
4-39
4-40
Leafspring . . . . . . . . . . . . . . ..__.___...__...__.._...................__.._
4-40-I
ADJUSTMENT
................................................................
5.1
Gap Between The Platen And Printhead ....................................
CLEANING AND LUBRICATION ..............................................
6.1
Cleaning ................................................................
6.2 Lubrication
..............................................................
TROUBLESHOOTING AND REPAIR ..........................................
7.1 Items to be Checked Before Repair
.........................................
7.2
MethodofTroubleshooting ...............................................
7.3
LampDisplay ............................................................
APPENDIX A PCB LAYOUT AND SHORT PLUG SETTING
...................................
APPENDIXB SIGNALLIST ....... .............._r ......................................
APPENDIXC CIRCUITDIAGRAM .......................................................
APPENDIXD SPAREPARTSLIST ........................................................
APPENDIX E SUPER SPEED RS-232C (for ML390/391/320/321)
SERIAL INTERFACE BOARD MAINTENANCE
..................................
1.
GENERAL ...............................................................
2.
OPERATION DESCRIPTION
................................................
2.1
ElementDescription .....................................................
...
III
5-1
5-1
6-l
6-l
6-2
7-l
7-l
7-2
7-3
A-l
B-l
C-l
D-l
E-l
E-l
E-2
E-2

2.2
2.2.1
2.2.2
2.3
2.3.1
2.3.2
3.
3.1
3.2
3.3
3.3.1
4.
CircuitDescription
.......................................................
E-2
Operationatpoweron ...................................................
E-4
RS232Cinterface
........................................................
E-4
Communication Procedure Flowchart
......................................
E-5
Mode a. ................................................................
E-5
Mode b .................................................................
E-6
TROUBLESHOOTING FLOWCHART
......................................... E-7
Before Repairing a Fault
................................................... E-7
Troubleshooting
.........................................................
E-7
LocalTest ...............................................................
E-11
Circuit test mode
.......................................................
E-l 1
CIRCUITSYMBOLSANDCIRCUITDIAGRAMS
...............................
E-13
iv

1. CONFIGURATION

1 m CONFIGURATION
1 .I Standard Printer Configuration
The standard configuration of the MICROLINE 320/321 is as follows.
Power supply assembly
I
Control
-tridge
Figure l-l Printer configuration
l-l

1.2 Options
(1) Pull tractor feed unit with acoustic cover
(2)
Cut-Sheet Feeder unit with access cover