Oki Microline 390 User manual

OK1 MICROLlI\
JE
3901391 Elite
MA
NTENANCE
MANUAL

PREFACE
This maintenance manual describes field maintenance of the Microline 390/391 Elite printer and
options for maintenance personnel.
For performance specifications and operating procedures, refer to the “User’s Manual”.

TABLE OF CONTENTS
1.
CONFIGURATION _. _. __________________ _. _.__. ._. .____. _. __.. ._._
I-I
1.1 Standard Printer Configuration
_. _. _.
I-I
1.2
Options . . . . . . . . . . . . . . . . . .._____.___________________.__...______._
1-2
1.3 Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..__.._._._
1-4
1.3.1
Printspecifications . .._.________..._..____.__._........________________ 1-4
1.3.2 Paperspecifications _. _. _____ __ _. _.
1-5
1.3.3 Physical specifications _. _. _. __
l-6
1.3.4 Power requirements
l-6
1.3.5 Environmental conditions
_. _. _.
1-7
1.3.6 Noise _._........_......_.__...__.___......_......________.......____.__._ 1-7
1.3.7 Agency approvals __ _. _. _. _. __
l-7
2. INSTALLATION PROCEDURE
_. _. _. _. _, _. _. __ _.
2-1
2.1 Unpacking _________..________.___.__..________...._._..___._..._____..___ 2-l
2.1.1 Unpacking the packing box
2-l
2.1.2 Unpackingtheprinterunit ___.___..______________...._..______..__..__..__ 2-2
2.1.3
Unpackingtheaccessories .___.____.__._____________...____._._..__._..__._ 2-3
2.2 Installation ____________.______._....______._.____.__________________...__ 2-4
2.2.1
Precautionforinstallation ___......_.___________.........____________._.__ 2-4
2.2.2 Removing the shipping retainer
2-6
2.2.3 lnstallingtheaccessories
_.______.___......_.____.____________.______.__.__ 2-7
2.2.4 Connectingcables _____.____.._.._____.._.____.....___....________..______ 2-8
2.2.5
Installingpaper .____.__.____________._...._...._..___..____...___________ 2-9
2.2.6 Poweringon
_____._._..,..___.._._......_.____..__.__._..__._...___.__.. 2-10
2.2.7 Rolling ASCII test pattern
2-11
3. THEORY OF OPERATION __ __. _. _. _. _. _.
3-1
3.1
Electrical Operation _. _. _. _.
3-I
3.1.1 General _________________.___.________._....._..............._____....... 3-1
3.1.2 Microprocessor and its peripherals circuits
3-1
3.1.3 Initialization _, _. _. _. . _. .
3-5
3.1.4 Interfacecontrol _____________.__.._._......._............................ 3-5
3.1.5 Printhead drive circuit
3-6
3.1.6 Spacing drive circuit .._
3-7

3.1.7 Line feed circuit ..........................................................
3-9
3.1.8 Alarmcircuits ............................................................
3-9
3.1.9 Paper end detection circuit
...............................................
3-10
3.1.10 Powersupply ...........................................................
3-11
3.2
Mechanical Operation
...................................................
3-12
3.2.1 The printhead mechanism and its operation
...............................
3-12
3.2.2 Spacing ................................................................
3-14
3.2.3 Head gap adjusting
......................................................
3-16
3.2.4 Ribbon drive
............................................................
3-18
3.2.5 Paperfeed ..............................................................
3-20
3.2.6 Paper end detection
.....................................................
3-27
3.2.7 Semi-automatic sheet feeder (SASF)
.......................................
3-28
3.2.8 Reversing continuoussheets
.............................................. 3-31
4. ASSEMBLY/DISASSEMBLY
................................................... 4-l
4.1
Precautions for Parts Replacement 4-l
4.2
MaintenanceTools
.......................................................
4-2
4.3
Disassembly/Reassemblyof Procedure
...................................... 4-3
4.3.1 Separatorassembly .......................................................
4-4
4.3.2 Printhead ................................................................
4-5
4.3.3 Uppercoverassembly
.....................................................
4-6
4.3.4 Controlboard ............................................................
4-8
4.3.5 Operator board
......................................................... 4-10
4.3.6 Bailarm
.............................................................
4-12
4.3.7 Connection board (SRBS)
.................................................
4-12
4.3.8 ICcardpanel ............................................................
4-14
4.3.9 Bailarmbar .............................................................
4-15
4.3.10 Transformer ............................................................
4-16
4.3.11 Filterassembly
.......................................................... 4-17
4.3.12 Power supply board .....................................................
4-18
4.3.13 Connectorcord .........................................................
4-19
4.3.14 Ribbon drive gear assembly
..............................................
4-20
4.3.15 Space motorassembly
...................................................
4-22
ii

4.3.16 Carriageframe __ _. _. _. _. _. _. _. _.
4-24
4.3.17 Spacerack .._.._.._____.______..._________.._......._____..__.._.__..__ 4-25
4.3.18 Guiderail ________.._....__.__.____.________..._.._..__.___.___________.. 4-26
4.3.19 Head cable __ _. _. _. _. _. _. _.
4-28
4.3.20 Platen assembly
4-28
4.3.21 Ribbon protector _. _. _. _. _. _.
4-30
4.3.22 LFmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1. 4-31
4.3.23 LF motor interconnect module 4-32
4.3.24 Idlergear ____..__..__._.______..________________________________.___._._ 4-33
4.3.25 Releaselever . . . ..______.___._.___.._.._._....._._____._._.....__________ 4-34
4.3.26 Pressure roller assembly
_. _. _. _. _. _. _. . _. _.
4-34
4.3.27 Tractor assembly _. _. _. _.
4-36
4.3.28 Sensorlever .._,___..____.....,_______________.________.__._...____._,... 4-38
4.3.29 Paper end lever
4-39
4.3.30 Leafspring ______._________________.._,...._._______.__.__.__.__.._____. 4-40
5. ADJUSTMENT __ _. _, _. _. _. _. _. . _.
5-1
5.1
Gap Between The Platen And Printhead
5-l
6. CLEANING AND LUBRICATION _.
6-1
6.1
Cleaning ________..___._.....__....__.___________________....._...,...... 6-l
6.2
Lubrication _.._______.._..__._________________...................__..__.. 6-1
7. TROUBLESHOOTING AND REPAIR _. _. _. _.
7-1
7.1
Items to Check Before Repair
7-l
7.2
Method of Troubleshooting
_.
7-l
7.3
LampDisplay ..__________._......._________._........____.__.______.____ 7-2
APPENDIXA PCBLAYOUT ____.._______.,.._______________...._._______.._____........ A-l
APPENDIXB SIGNALLIST _____.__._________.._.___________________....__._____________ B-1
APPENDIXC CIRCUITDIAGRAM ._______...._.__.___________.....___._.________........ C-l
APPENDIXD SPAREPARTSLIST __________.__________.________._.______________.____.... D-l
APPENDIX E RS-232C (for ML390/391/320/321 Elite) SERIAL INTERFACE BOARD
E-l
1.
GENERAL _______..__._______._...___.______._._._._______.._..________... E-l
2.
OPERATION DESCRIPTION
_. _. _. _. ___
E-2
2.1
ElementDescription . . . ..___________..__._________.__._._.________._.___.. E-2
iii

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.
Circuit Description
E-2
Operation at poweron
E-4
fS232Cinterface _.__.________________..______________________.....______ E-4
Communication Procedure Flowchart
_. _. _. _. _. _. _.
E-5
Mode@ __________..________________________.___.,,,..._..___..__________ E-5
Mode@ ..__._._.._______._...._____________._
E-6
TROUBLESHOOTING FLOWCHART
_. _. _. _. _. _.
E-7
Before Repairing a Fault
_.
E-7
Troubleshooting _....______________...___.._____________._.._____________ E-7
LocalTest ______..__._______.___.._.___________........__.______,..._.... E-11
Circuit test mode E-l 1
CIRCUITSYMBOLSAND CIRCUIT DIAGRAMS E-13
iv

1. CONFIGURATION

1. CONFIGURATION
1.1 Standard Printer Configuration
The standard configuration of the ML390/391 Elite is as follows
py-
Platen knob
Paperseparator
\
Ribbon
cassette
perat
smbly
Figure l-l Printer configuration
l-l

1.2 Options
(1) Tractorfeed unit with acoustic cover
(2) Cut-sheet feeder unit with access cover

(3) Super-speed RS-232C serial interface board
(4) Font memory card
l-3

1.3 Specifications
1.3.1 Print specifications
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Print method :
Number of dot wires
:
Dot wire diameter
:
Print direction :
Impact dot matrix
24
0.0079 inch (0.2 mm)
Bidirectional, short-line-seeking printing
Unidirectional printing specifiable
Print speed
Print mode
Utility
LQ
Character pitch
IOCPI 12CPI 15CPI
17.1 CPI
20 CPI
225.0 CPS 270.0 CPS 168.6 CPS 192.9
CPS 225.0 CPS
75.0 CPS
90.0 CPS 112.5 CPS
128.6 CPS 150.0 CPS
Character sets
Standard ASCII
EPSON Character Set
IBM Character Set I & II
IBM Proprinter Compatible Character Set
Foreign Character Substitution
Line Graphics
Character pitches
The following character pitches are selectable through the operator panel* or with control
codes:
5 CPI
0.2 inch (5.08 mm)
6 CPI 0.167 inch (4.23 mm)
8.5 CPI 0.117 inch (2.96 mm)
* 1OCPI 0.1 inch(2.54mm)
* 12 CPI 0.083 inch (2.12 mm)
* 15 CPI 0.067 inch (1.69 mm)
* 17.1 CPI 0.058inch (1.48mm)
* 20 CPI 0.05 inch (1.27 mm)
1-4

1.3.2 Paper specifications
(1)
(2)
(3)
(4)
Cut-sheet paper
The standard size : 8-l/2 inches (wide) x 11 inches (long) for the U.S.
A4 size
: 210 mm (wide) x 297 mm (long) for Europe
Weight
: 12 to 24 lb (45 to 90 g/mz)
Multiple-part paper cannot be used.
Sprocket paper
The tractor feed unit can handle sprocket paper of the following widths:
ML390 Elite: 3 to 10 inches (76.2 to 254 mm)
ML391 Elite: 3 to 16 inches (76.2 to 406.4 mm)
One-part paper
Ream weight: 12 to 24 lb (45 to 90 g/m*)
Multiple-part paper: 0.014 inch (0.356 mm) or lesstotal thickness
Number of sheets Ream weig~ht
Number of sheets
Carbon-lined paper
Pressure-sensitive paper
interleaf paper
(paper)
(carbon)
9toll lb
(35 to 40 g/m*)
IOtolZlb
(38 to 45 g/m2)
9lh
(35 glm2)
upto
including original
Upt04
including original
Multiple-part paper should be fastened by spot-pasting or crimping on both sides, and should
be free of wrinkles.
Cut envelope
Weight :
Thickness :
Size
24 Ibs (90 glm2) or less
0.016 inch (0.41 mm) or less
6-112 x 3-518 inches
8-718 x 3-718 inches
9-l/2 x4-118 inches
Multiple-part envelope
Weight
: 24 Ibs (90 glmz) or less
Thickness
: 0.014 inch (0.36 mm) or less
Width
: 3 to 10 inches (76.2 to 254 mm)
Medium feed : Bottom paper feed only
I-5

(5) Card
Weight
: 100 Ibs (162.8 g/m2) or less
Thickness
: 0.008 inch (0.20 mm) or less
Size
: 5 x8 inches (when cut apart)
Medium feed : Bottom paper feed only
(6) Label
Thickness
: 0.011 inch (0.28 mm) or less
Size
: ML390 Elite-8.5x3.25 inches(216x83 mm) or less
ML391 Elite- 15x3.25 inches(381 x83 mm) or less
(7) OHP sheet (transparencies)
Thickness
: 0.004 inch (0.10 mm) or less
Size
: 8.5 x 11 inches (216 x 280 mm) or less
1.3.3 Physical specifications
(1) Outside dimensions
ML390 Elite :
15.67 inches (398)(W) x 4.57 inches (I 16)(H) x 13.58 inches (345)(D)
ML391 Elite : 21.73 inches(552)(W)x4.57inches(l16)(H) x13.58inches(345)(D)
These dimensions do not include the platen knob, acoustic cover and paper separator,
(2) Weight
ML390 Elite : 18.5 lb (8.4 kg)
ML391 Elite : 22.3 lb(10.1 kg)
1.3.4 Power requirements
(1) input power
Single-phaseAC
Voltage
: One of the following as specified: 2201240 VAC + 10% - 10%
Frequency : 50/60Hz + 2%
(2) Power consumption
Operating : IlOVA
Idle
: 40VA
l-6

1.3.5 Environmental conditions
(1) Ambient temperature and relative humidity
Operating Non-operating Storage Unit
Temperature
Relative Humidity
41 to 104 14to 109.4 -40
to 158
(5 to 40) (-lOto43) (-40 to 70)
20 to 90 5to95 5to95 % RH
The printer must be packed during storage
Avoid condensation at all times.
(2) Vibration
Operating
: 0.3G (5 to 150 Hz) or less (except the unit is resonant frequency)
Non-operating : 1G (5 to 150 Hz) or less (except the unit is resonant frequency)
(3) Impact (Drop test)
Packing
: 30” (One corner and three edges and all six sides)
1.3.6 Noise
The 8-second average noise is less than 57 dB(A)
(’
In all mode), 52 dB(A) (in quiet mode) when
measured under the above conditions with the printer fitted with the acoustic cover.
1.3.7 Agency approvals
ULNo. :
CSANo. :
FCC :
VDE :
B5 :
The printer is listed in UL STANDARD No. 478.
CSA certification to CSA STANDARD C22.2 No. 220
FCC certified per Part 15, SUBJECT J, CLASS B.
VDE 0806.
VDE 0871 Class B.
ES 5850
I-7

2. INSTALLATION PROCEDURE

2. INSTALLATION PROCEDURE
2.1 Unpacking
2.1.1
Unpacking the packing box
(1) Unpackthepackingbox.
(2) Takeouttheprinterunit.
(3) Takeouttheaccessories.
Packing box
2-1
. ,’

2.1.2 Unpacking the printer unit
(1)
Removethe printer unit from the polyethylene bag.
Polyethylene bag
Printer unit
2-2

2.1.3 Unpacking the accessories
(1) Remove the AC cable, fuses, paper separator, platen knob, ground screw, and ribbon cassette
from the polyethylene bag.
Paperseparator
Polyethylene bag
Ribbon cassette
Platen kno6
2-3

2.2 Installation (Refer to the User’s Manual for Details.)
2.2.1 Precaution for installation
Pay attention to the following when installing the printer:
(1)
(2)
(3)
(4)
Do not install the printer in the following places:
CL/
W
w
Cd)
(4
(0
(cd
Any place exposed to direct sunlight.
Any place with great fluctuations in temperature.
Any place exposed to outdoor wind.
A dusty place
Near a door
Near an air-conditioner.
Any place with heavy vibrations.
DO not smoke in the area where the printer is installed.
Adjust the temperature and humidity of the installation site as follows:
Temperature :
41 to 104°F (5 to 40°C)
Humidity : 20to90% RH
Place the printer and continuous form in the following procedure:
1) The height of the desk for the printer is 28 inches (70 cm) standard.
(Install the printer on a level and flat desk or stand so that its four rubber feet fit flatly on
the surface.)
2) Paper positioning
Place forms in parallel with the paper feed path.
The positioning tolerance of the left and right direction should be less than 1 inch (2.5 cm).
2-4

3) Printer rear space requirement
Match the rear part of the printer with the edge of a desk.
Leave a space of more than 24 inches (60 cm) at the rear of the printer to allow sufficient
space for paper.
4) To prevent incoming and outgoing forms from interfering with each other, place the forms
within 4to 6 inches (10 to 15 cm) from the edge of a desk.
Paper jamming may occur if forms interfere with each other.
More than 24 inches
2-5