Oki Microline 182 User manual

MICROLINE 182/183 PRINTER
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MAINTENANCE MANUAL
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PREFACE
This maintenance manual describes field maintenance of the Microline 182/l 83 for
maintenance engineers.
For performance specifications and operating procedures, refer to the “User’s Manual”.

CONTENTS
Page
CONFIGURATION ......................................................... l-l
1.1 Standard Printer Configuration ....................................... l-l
1.2 Options .............................................................
1-2
MAINTENANCE TOOLS ....................................................
2-1
PARTS REPLACEMENT ..................................................... 3-l
3.1 Precautions for Parts Replacement ................................... 3-l
3.2 Disassembly and Reassembly Procedures
............................
3-2
CLEANING .................................................. .............. 4-l
ADJUSTMENT ............................................................. 5-l
TROUBLESHOOTING AND REPAIR ........................................ 6-l
6.1
Items to be Checked Before Repair ..................................
6-1
6.2
Method of Troubleshooting ...........................................
,6-l
6.3
Connection Circuit and Resistance Check for
Print Head and LF/SP Motor .....................................
6-5
Cl RCUIT DIAGRAM ......................................................... 7-l
MAINTENANCE PARTS LIST .................................................
8-1
THEORY OF OPERATION
SPECIFICATIONS (STANDARD MODEL)
.SPECIFICATIONS (IBM COMPATIBLE MODED
DIP SWITCH SETTING TABLE, (STANDARD MODEL)
DIP SWITCH SElTlNG TABLE (IBM COMPATIBLE MODE0

RECORDS OF CHANGES
Part No.
OKI-J Par1
No.
M-52033;
ISSUE 1
EC0 No. Printer/PCB Serial No.
NML-007
NML-035
NML-053
NML-063
ML182
220 v
240 V
ML183
220 v
240 V
ML182
220 v
240 V
ML183
220 v
240 V
501 A00001 61
501A0000041
501 A0000001
501 A0000001
504AOOO9311
504A0004441
-
-
ML182
220 v 506AOO12961
240 V
506A0007001
ML183
220 v
506A0000009
240 V
506A0000003
ML1 82
220 v
508A0016961
240 V
508A0008501
ML183
220 v
506A0000009
240 V
506A0000003
Page affected Description of
changes
i-24, 3-25,3-28, F;“;c;t;entj
1-29,
i-9, 8-10,
M-5, AA-IO, (Addition)
:ront-cover,
‘reface, l-1,
i-2, 3-34
i-2 to 8-8
IB-1, AB-2
IC-I, AC-2
Descriptions of
ML183 are added.
(Replacement)
Circuit, diagram
‘-27 to 7-33 (Rev.
7) of SLMC-2
circuit board is
added.
(Addition)
Circuit diagram
(Rev. 8) of SLMC-2
circuit board is
r-35 to 7-41 added.
(Addition)
I
Circuit diagram
(Rev. 9) of SLMC-2
circuit board is
7-43 to 7-49 added.
(Addition)
Circuit diagram
(Rev. 10) of SLMC-2
circuit board is
7-51 to 7-57 added.
(Addition)
Circuit diagram
(Rev. 11) of SLMC-2
circuit board is
7-59 to 7-69 added.
(Addition)

(con.)
Part No.
EC0 No. Printer/PCB Serial No. >age affected
rD1, AD2
\E-1
LB-3
iack cover
Description of
changes
Change of DIP
switch functions
LReplacement)
(Deletion)
Renewal of issue
(Replacement)

1. CONFIGURATION
‘\._

_,.
1. CONFIGURATION
1.1
Standard Printer Configuration
The
standard configuration of the ML 182/l 83 is as fOllOws:
tractor feed unit
_ A
(ML183 only)
Control board ,:
COW assembly
er SUDPIY assembly
Figure l-1 Printer Configuration
l-l

1.2 Options
(l), ,Tractor feed unit with acoustic cover, access cover and paper separator
(only ML1 82)
(2) Roll paper stand (only ML182)

‘._
(3) Super-speed RS232-C serial interface board,
(4)
.-,
Super-speed RS422-A serial interface board
(5) High-speed RS422-A serial interface board
:
l-3

I. CONFIGURATIO’N
1.1 Standard Printer Configuration
The standard configuration of the ML 182/l 83 is as follows:
y/.Power supply assembly
v//Ribbbn cartridge
Figure l-1 Printer Configuration
1 -,4

1.2 Options
(1) Tractor f
ee
d
unit with acoustic cover and, access cover.
,(only Mll82)
__
(2) Roll
paper stand (only MLJ 82)
with paper row detection
micro switch
1-5

2. MAINTENANCE

‘L
2. MAINTENANCE TOOLS
The tools in table 2-l are necessary for replacing printed-circuit boards and unit parts. For other
maintenance procedures, different tools may be necessary.
Table 2-l Maintenance Tools
No. Tool
Quantity Purpose Remarks
1 Phillips screwdriver
1 2- to 2.6-mm screws
No. l-100
2 Phillips screwdriver
1 3- to 5-mm screws
No. 2-200
3 Screwdriver No. 3-100
1
4 Cutters No. 5H
1
5 Round pliers No. 1
1
6
Thickness gauge set 1 for head gap adjustment
7 Metal rod
1 for head gap. adjustment
a Volt-ohm-milliammeter
1
2-l

3, PARTS REPLACEMENT

.._
3.
3.1
(1)
(2)
(3)
.~~ (4)
(5)
(6)
(7)
(8)
PARTS REPLACEMENT
Precautions for Parts Replacement
Be sure to turn OFF the AC POWER switch and remove the AC,input plug from the AC
receptacle before disassembly or reassem’bly.
Don not disassemble the printer as long as it is in good operating condition.
Be careful not to remove parts unless, necessary. Disassembly should be the minimum
necessary.
Use only the specified maintenance tools.
Disassemble the printer in the specified order of disassembly procedures; otherwise,
parts may be damaged.
In the course of disassembly, it may be agood ideato keep the removed small parts such
as screws and washers by attaching them temporarily to their original places so as not to
lose them.
KS such as the microprocessor, ROM, and RAM can easily be damaged by static
electricity. Do not wear gloves that are apt to produce static electricity when handling
printed-circuit boards.
Do not place the printed-circuit boards directly on the printer or the floor.
3-l

3.2
3.2.1
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
Disassembly and Reassembly .Procedures
Upper cover
Turn OFF the AC POWER switch, and remove AC cable @ from the outlet, and then
remove interface cable @ , remove paper.
Remove acoustic cover and paper separator (if installed).
Remove tractor feed unit @ by depressing lock lever @ and tilting backward (if it is
installed).
Remove roll paper with paper shaft @ by lifting upward. Remove side frame @ by
tilting forward (if it is installed).
Remove access cover @ by lifting rear, edge.
Pull platen knob @ out
Remove two screws’@.
Remove upper cover @ by lifting up front and pushing it backward.
For reassembly, reverse the disassembly procedure.
3-2

3 i 3

3.2.2
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Control board
Remove the upper cover (see 3.2.1).
Remove serial interface board by removing two screws locating on both sides of
interface connector. Remove interface board upward (if installed).
Remove transformer connector @ from the, control board @ .
Remove three screws @ and two screws @.
Remove control board @ by !ifting upward (see Notes below). Observe’paper near-
end lever when removing the PCB.
Before reassembly, secure rubber insulator @ is, installed.
For reassembly, reverse the disassembly procedure..
Notes:
7. Do not”fouch the terminal (contact) @for connector @directly with hand and make
sure that if ,i.s clean.
2. When affachin , make sure that pa er near-end lever 0 is c/ear in the groove of
phofosensor 8 on control board 1 .
66
3-4

3.2.3 Transformer assembly
(1)
(2)
(3)
(4)
(5)
(6)
Remove the upper cover (see 3.2.1).
Remove connector @ from the control board.
Remove ground strap screw @
Remove two screws 0.
Remove transformer assembly@ with power PCB@ and AC cord receptacle @ by
lifting upward.
For reassembly, reverse the disassembly procedure.
3-6