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Messages on the LCD CLEAN UP SCANNER Probable Cause In the scanning compensation data list printed by the maintenance-mode function code 05 (refer to Chapter V, Section 3.2), less than fifty percent of the white level data is faulty. (This message may appear only in the maintenance mode.) COOLING DOWN WAIT FOR A WHILE (These messages appear alternately.) The controller, which monitors the internal resistance of the incasing temperature sensor (thermistor) and heater thermistor, has detected that the temperature inside the machine or the heater temperature exceeded the specified level. If either temperature exceeds the preset level, recording is no longer possible. COVER OPEN The cover sensor detects that the front cover is not closed. PLS CLOSE COVER (These messages appear alternately.) (In the 1st row) * n Document jam CHECK DOCUMENT CHECK ORIGINAL (In the 2nd row) Remove document, then press STOP KEY. (1) The document length exceeds the limitation (400 or 90 cm) registered by firmware switch WSW16. (Refer to Chapter V, Section 3.5.) (Both the document front and rear sensors stay ON after the document has been fed by the registered length.) (2) The document rear sensor detects no trailing edge of a document after the document has been fed by 400 cm. (The document rear sensor stays ON even after the document has been fed when the document front and rear sensors were OFF and ON, respectively.) n Document loading error (1) The document rear sensor detects no leading edge of a document within 10 seconds from the start of document loading operation. (The document rear sensor stays OFF even after the document has been fed when the document front sensor was ON.) (2) The loaded document is too short. (Since the document is shorter than the distance between the document front and rear sensors, the document front sensor is turned OFF before the document rear sensor is turned ON.) (In the 1st row) * CHECK ROM VER (In the 2nd row) NC-8100h firmware update req'd: Visit web site. An optional LAN card (NC-8100h) is newly installed to the machine. However, the current firmware in the machine cannot support the optional LAN card. You need to update the firmware. *On machines equipped with a single-row LCD, these messages appear alternately. VI - 2

Section	Page
CHAPTER I. GENERAL DESCRIPTION	6
1. MACHINE OUTLINE	7
1.1 External Appearance and Weight	7
1.2 Components	7
2. SPECIFICATIONS	8
CHAPTER II. INSTALLATION	25
1. INSTALLING THE UPDATE DATA TO THE FACSIMILE MACHINE	26
2. SETTING ID CODES TO FACSIMILE MACHINES	28
CHAPTER III. THEORY OF OPERATION	30
1. OVERVIEW	31
2. MECHANISMS	32
2.1 Scanner Mechanism	33
2.2 Laser Printing Mechanism	35
2.2.1 Paper pick-up and registration mechanism	35
2.2.2 Print process mechanism	36
2.2.3 Heat-fixing mechanism	38
2.2.4 Paper ejecting mechanism	39
2.3 Sensors and Actuators	40
3. CONTROL ELECTRONICS	43
CHAPTER IV. DISASSEMBLY/REASSEMBLY AND	45
1. DISASSEMBLY/REASSEMBLY	47
Safety Precautions	47
Preparation	48
How to Access the Object Component	48
Disassembly Order Flow	49
1.1 Lower Rear Cover	50
1.2 Access Plates R and F	50
1.3 Paper Cassette	51
1.4 Document Tray ASSY	52
1.5 Upper Rear Cover	54
1.6 ADF Unit and Document Tray Open Sensor	55
1.7 Scanner Unit and Control Panel ASSY	62
1.8 Relay PCB	71
1.9 Speaker	72
1.10 Scanner Mount	73
1.11 Paper Sub Tray and Tray Holder	76
1.12 VC Cover, VC Bracket, and VC Connector PCB (for models supporting	77
1.13 Front Cover	78
1.14 Outer Chute and Paper Pinch Rollers	79
1.15 Main Cover	80
1.16 Switch Cover (for models not equipped with a power switch)	81
1.17 Laser Unit	82
1.18 Heat-fixing Unit and FU Lamp	83
1.19 Fan	97
1.20 Drive Gear ASSY and Main Motor ASSY	99
1.21 NCU Shield and NCU PCB	101
1.22 Bottom Plate, Main PCB, and Bottom Insulation Film	103
1.23 Low-voltage Power Supply PCB and Power Inlet	107
1.24 Inner Insulation Film, High-voltage Power Supply PCB, Engine PCB, and 2nd Cassette Relay PCB	109
1.25 Toner Sensor (light-receiver) PCB and Toner Sensor (LED) PCB	111
1.26 Gears and Paper Pick-up Roller	112
1.27 Paper Feed Roller ASSY	113
1.28 Clutch Levers, Cassette Guide L, and Solenoid	114
1.29 Cleaning of High-voltage Contacts and Grounding Contacts	115
2. LUBRICATION	117
[ 1 ] ADF unit	117
[ 2 ] Scanner mount	118
[ 3 ] Drive gear ASSY	119
[ 4 ] Paper cassette	120
CHAPTER V. MAINTENANCE MODE	122
1. ENTRY INTO THE MAINTENANCE MODE	123
2. LIST OF MAINTENANCE-MODE FUNCTIONS	124
3. DETAILED DESCRIPTION OF MAINTENANCE-MODE FUNCTIONS	127
3.1 EEPROM Parameter Initialization	127
3.2 Printout of Scanning Compensation Data	128
3.3 ADF Performance Test	130
3.4 Test Pattern 1	131
3.5 Firmware Switch Setting and Printout	132
[ A ] Firmware switch setting	132
[ B ] Printout of firmware switch data	134
3.6 Operational Check of LCD	135
3.7 Operational Check of Control Panel PCB	135
3.8 Sensor Operational Check	138
3.9 CCD Scanner Area Setting	140
3.10 EEPROM Customizing	140
3.11 Erasure of Received FAX Messages Temporarily Stored in the Flash Memory (Not applicable to the American version)	141
3.11A Display of the Equipment's Log Information	142
3.12 Machine Error Code Indication	143
3.13 Output of Transmission Log to the Telephone Line (Not applicable to machines w/o fax)	143
3.14 Cancellation of the Memory Security Mode (Not applicable to the American version or machines w/o fax)	144
CHAPTER VI. ERROR INDICATION AND TROUBLESHOOTING	146
1. ERROR INDICATION	147
1.1 Machine Errors	147
[ 1 ] Error messages on the LCD	147
[ 2 ] Error codes shown in the \	151
1.2 Communications Errors (Not applicable to machines w/o fax)	153
2. TROUBLESHOOTING	163
2.1 Introduction	163
2.2 Precautions	163
2.3 Checking prior to Troubleshooting	163
2.4 Troubleshooting Procedures	165
[ 1 ] Control panel related	165
[ 2 ] Telephone related	165
[ 3 ] Communications related	166
[ 4 ] Paper/document feeding related	166
[ 5 ] Print-image related	167
[ 6 ] PC-driven or video capture-driven printing	173
Location of High-voltage Contacts and Grounding Contacts	174
Appendix 1. EEPROM Customizing Codes	176
Appendix 2. Firmware Switches (WSW)	179
Appendix 3. Circuit Diagrams	228
A. Main PCB (MFC9800/MFC9880/MFC9860/MFC9760)	229
A. Main PCB (MFC9700/DCP1400)	235
B. Engine PCB	241
C. Engine PCB	242
D. NCU PCB	243
E. Control Panel PCB	247

Match case Limit results 1 per page

- 2

Messages on the LCD

Probable Cause

CLEAN UP SCANNER

In the scanning compensation data list printed by the mainte-

nance-mode function code 05 (refer to Chapter V, Section 3.2),

less than fifty percent of the white level data is faulty.

(This message may appear only in the maintenance mode.)

COOLING DOWN

WAIT FOR A WHILE

(These messages appear

alternately.)

The controller, which monitors the internal resistance of the in-

casing temperature sensor (thermistor) and heater thermistor,

has detected that the temperature inside the machine or the

heater temperature exceeded the specified level.

If either

temperature exceeds the preset level, recording is no longer

possible.

COVER OPEN

PLS CLOSE COVER

(These messages appear

alternately.)

The cover sensor detects that the front cover is not closed.

(In the 1st row)

CHECK DOCUMENT

CHECK ORIGINAL

(In the 2nd row)

Remove document, then

press STOP KEY.

Document jam

(1)

The document length exceeds the limitation (400 or 90 cm)

registered by firmware switch WSW16. (Refer to Chapter V,

Section 3.5.)

(Both the document front and rear sensors stay ON after the

document has been fed by the registered length.)

(2)

The document rear sensor detects no trailing edge of a

document after the document has been fed by 400 cm.

(The document rear sensor stays ON even after the

document has been fed when the document front and rear

sensors were OFF and ON, respectively.)

Document loading error

(1)

The document rear sensor detects no leading edge of a

document within 10 seconds from the start of document

loading operation.

(The document rear sensor stays OFF even after the

document has been fed when the document front sensor

was ON.)

(2)

The loaded document is too short.

(Since the document is shorter than the distance between

the document front and rear sensors, the document front

sensor is turned OFF before the document rear sensor is

turned ON.)

(In the 1st row)

CHECK ROM VER

(In the 2nd row)

NC-8100h firmware update

req'd: Visit web site.

An optional LAN card (NC-8100h) is newly installed to the

machine. However, the current firmware in the machine cannot

support the optional LAN card. You need to update the firmware.

*On machines equipped with a single-row LCD, these messages appear alternately.