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MC770
Oki MC770 Maintenance Manual
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45584901TH Re
v
.1
6-4 /
Oki Data CONFIDENTIAL
(5)
T
ak
e out the connectors and cable from the CU board case
.
Fig.6-11
(6)
Remo
v
e 2 screws
.
Fig.6-12
(7)
Remo
v
e8screws
,andthentakeofftheCUboard.
Notes:
WhenremovingtheCUboard,donotapplypressuretotheheatsink,memoryorSRAM
board by holding them too firmly
.
Fig.6-13
194
196
Table of Contents
Specifications/System List
16
HDD Memory Map
17
System List
18
Disassembly and Replacement
19
Fax Unit (GD-1340)
21
Caster Stand
22
Spacer
23
Offline Stapler
24
Self-Diagnostic Mode
25
Service UI
29
SERVICE MODE] Screen
30
Input Check (Test Mode 03)
31
Output Check (Test Mode 03)
32
Test Print Mode (Test Mode 04)
33
Operation Procedure in Adjustment Mode (05)
34
Test Print Pattern in Adjustment Mode (05)
36
Operation Procedure in Setting Mode (08)
40
Assist Mode (3C)
42
HDD Assist Mode (4C)
45
Functions
47
File System Recovery Mode (5C)
49
Functions
50
SRAM Clear Mode (6C)
54
Functions
55
Operation Procedure
56
List Printing
57
Error History
59
Image Related Adjustment
64
Performing Density Correction
65
Image Dimensional Adjustment
66
Image Dimensional Adjustment in the Copy/Printer/Fax Function
67
Image Quality Adjustment (Copying Function)
68
Image Quality Adjustment (Printing Function)
70
Gamma Balance Adjustment (Black Mode)
72
Color Balance Adjustment
74
Adjustment of Faint Text
76
Maximum Toner Density Adjustment (Special Paper 3)
77
Pureblack/Puregray" Threshold Adjustment (Twin Color Mode)
78
Toner Limit Threshold Adjustment
79
Sharpness Adjustment
80
Thin Line Width Lower Limit Adjustment
81
LED Emission Level Adjustment
82
Density Adjustment of Graphic Lines (1200 Dpi)
83
Auto Trapping Width/Density Adjustment (PS)
84
Image Quality Adjustment (Scanning Function)
85
Density Adjustment
86
Background Adjustment (Color Mode)
87
Background Adjustment (Black/Grayscale)
88
Sharpness Adjustment
89
RGB Conversion Method Selection
90
Adjustment of the Capacity and Image Quality of Slimpdf
91
Surrounding Void Amount Adjustment
92
JPEG Compression Level Adjustment
93
General Descriptions
94
Collection of Debug Logs with a USB Device
95
Error Code List
97
Service Call
98
Error in Internet FAX / Scanning Function
101
Printer Function Error
110
Web Page Related Error/Communication Error with External Application
112
MFP Access Error
113
Maintenance Error
114
Network Error
115
Error History
118
Diagnosis and Prescription for each Error Code
120
Paper Jam in Finisher Section
121
Finisher Related Service Call
125
Communication Related Service Call
133
Circuit Related Service Call
136
Other Service Call
138
Error in Internet FAX / Scanning Function
156
Printer Function Error
168
Web Page Related Error/Communication Error with External Application
170
MFP Access Error
174
Maintenance Error
176
Network Error
181
Other Errors
191
Removal and Installation of PC Boards/Hdd
192
CU Board Cover
194
Hard Disk (HDD)
196
SRAM Board <For CU Board>
197
FAX Unit
198
Precautions, Procedures and Settings for Replacing PC Boards and HDD
199
HDD Fault Diagnosis
200
Precautions and Procedures When Replacing the HDD
202
Precautions and Procedures When Replacing the CU Board
207
Precautions and Procedures When Replacing the PU Board
217
License Re-Registration Using the One-Time Dongle
218
Precautions for Installation of GP-1070 and Disposal of HDD/ Board
220
Remote Service
221
Setting Procedure
224
Order Sheet Format
234
Service Notification
238
Items to be Notified
244
Firmware Updating
256
Firmware Updating with USB Device
258
Update Procedure
260
Patch Updating with USB Device
268
Update Procedure
270
Firmware Updating with PWA-DWNLD-JIG2
275
Writing the Data to the Download Jig (PWA-DWNLD-JIG2)
276
System Firmware
278
Firmware Updating with K-PWA-DLM-320
280
FAX Unit Firmware (GD-1340)
281
Confirmation of the Updated Data
283
When Firmware Updating Fails
284
Flow Chart for Correcting USB Update Failure
285
Backup FUNCTION
287
Backup Files
288
AES Data Encryption Function Setting
291
Setting Procedure
292
Procedure for Disabling Data Encryption Function
296
High Security Mode
297
Precautions
298
External Counters
299
Details of the Signals
301
Notices
303
Self-Diagnosis Code (03/04/05/08 Code)
304
Adjustment Mode (05) Codes
307
Setting Mode (08) Codes
379
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Oki MC770 Specifications
General
Brand
Oki
Model
MC770
Category
All in One Printer
Language
English
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