Canon MP 780, MP 750 User Manual

0 (0)

PIXMA MP 780 PIXMA MP 750

SERVICE

MANUAL

Canon

Copyright 2004, Canon U.S.A. This technical publication is the proprietary and confidential information of Canon U.S.A. which shall be retained for reference purposes by Authorized Service Facilities of Canon U.S.A. Its unauthorized use is prohibited.

PIXMA MP750/780 SERVICE MANUAL

REVISION 0

PIXMA MP750	H12-4562	120V USA
PIXMA MP750	H12-4563	230V EMB
PIXMA MP750	H12-4564	230V GB
PIXMA MP750	H12-4565	230V EUM
PIXMA MP750	H12-4566	120V CND
PIXMA MP750	H12-4568	230V AUS
PIXMA MP780	H12-4582	120V USA
PIXMA MP780	H12-4583	230V EE/NE
PIXMA MP780	H12-4584	230V GB/ME/NORD/ZA
PIXMA MP780	H12-4585	230V AT/CH/DE
PIXMA MP780	H12-4586	230V WEST
PIXMA MP780	H12-4587	120V CND/LTN
PIXMA MP780	H12-4588	230V AUS
PIXMA MP780	H12-4589	230V AE
PIXMA MP780	H12-4597	230V CHN

HY8-13A3-000

Scope

This manual has been issued by Canon Inc., to provide the service technicians of this product with the information necessary for qualified persons to learn technical theory, installation, maintenance, and repair of products. The manual covers information applicable in all regions where the product is sold. For this reason, it may contain information that is not applicable to your region.

Revision

This manual could include technical inaccuracies or typographical errors due to improvements or changes made to the product. When changes are made to the contents of the manual, Canon will release technical information when necessary. When substantial changes are made to the contents of the manual, Canon will issue a revised edition.

The following do not apply if they do not conform to the laws and regulations of the region where the manual or product is used:

Trademarks

Product and brand names appearing in this manual are registered trademarks or trademarks of the respective holders.

All rights reserved. No parts of this manual may be reproduced in any form or by any means or translated into another language without the written permission of Canon Inc., except in the case of internal business use.

CANON INC.

Inkjet MFP Quality Assurance Div.

5-1 Hakusan 7-Chome, Toride-city, Ibaraki 302-8501, Japan

I. MANUAL OUTLINE

This manual consists of the following three parts to provide information necessary to service the PIXMA MP750/MP780:

Part 1: Maintenance

Information on maintenance and troubleshooting of the PIXMA MP750/MP780

Part 2: Technical Reference

New technology and technical information such as FAQ's (Frequently Asked Questions) of the PIXMA MP750/MP780

Part 3: Appendix

Block diagrams and pin layouts of the PIXMA MP750/MP780

Reference:

This manual does not provide sufficient information for disassembly and reassembly procedures. Refer to the graphics in the separate Parts Catalog.

II. TABLE OF CONTENTS

	Part 1: MAINTENANCE
1	- 1	1. MAINTENANCE
1	- 1	1-1. Adjustment, Periodic Maintenance, Periodic Replacement Parts, and Replacement
		Consumables by Service Engineer
1	- 3	1-2. Customer Maintenance
1	- 4	1-3. Product Life
1	- 4	1-4. Special Tools
1	- 5	1-5. Serial Number Location
1	- 6	2. LIST OF ERROR DISPLAY / INDICATION
1	- 6	2-1. Users Error Messege
1	- 9	2-2. Users Error Code
1	- 9	2-3. Service Call Errors
1	- 14	2-4. New Error Codes and Recovery Methods
1	- 16	2-5. Warnings
1	- 17	2-6. Troubleshooting by Symptom
1	- 22	2-7 Processing Communication Problems (MP780 only)
1	- 22	2-7-1 Initial Identification of Problems
1	- 24	2-7-2 Procedures for Processing Communication Problems
1	- 25	2-7-3 Procedures for Processing Communication Problems with Canon Facsimile.
1	- 26	2-7-4 Procedures for Processing Communication Problems with other Manufacturer's
		Facsimiles.
1	- 27	3. REPAIR
1	- 27	3-1. Notes on Service Part Replacement (and Disassembling / Reassembling)
1	- 30	3-2. Special Notes on Repair Servicing
1	- 30	3-2-1 Flexible Cable and Harness Wiring, Connection
1	- 33	3-3. Adjustment / Settings
1	- 33	3-3-1 Paper Feed Motor Adjustment
1	- 33	3-3-2 Gear Phase Adjustment
1	- 35	3-3-3 Lift Cam Shaft Ass’y Adjustment
1	- 36	3-3-4 Solenoid Cam Spring Location
1	- 36	3-3-5 Carriage Shaft Clip Location
1	- 37	3-3-6 White Sheet Location
1	- 39	3-3-7 Grease Application
1	- 41	3-3-8 Waste Ink Counter Setting
1	- 41	3-4. User Data Flow
1	- 46	3-5. Service Switches
1	- 46	3-5-1 Hardware Switches
1	- 46	3-5-2 Service Data Setting
1	- 47	3-5-3 Service Data Registration / Setting Method
1	- 48	3-5-4 Service Data Flowchart
1	- 54	3-5-5 Explanation of service data
1	- 55	3-5-6 New SSSWs / parameters added to this model
1	- 60	3-5-7 SSSW Default Setting
1	- 78	3-6. Test Mode / Factory Mode
1	- 78	3-6-1 Test Mode / Factory Mode Overview

1	- 79		3-6-2 Test Mode Menu
1	- 80		3-6-3 Factory Mode
1	- 81		3-6-4 Operation Panel Test
1	- 83		3-6-5 Print Test
1	- 85		3-6-6 CD-R Calibration (230V only)
1	- 85		3-7. Upgrading the version of SPCNT Flash ROM
1	- 86		3-8. Verification Items
1	- 86		3-8-1 Users Report Service Test Print
1	- 87		3-8-2 Service EEPROM Information Print
1	- 88		3-8-3 System Data List (MP780 only)
1	- 95		3-8-4 System Dump List (MP780 only)
1	- 99		3-8-5 Service Activity Report (sending/receiving) (MP780only)
1	- 101		3-8-6 EEPROM Information Print
1	- 102 4. Cleaning Your Machine
1	- 102		4-1 Caution
1	- 102		4-2 Cleaning the Exterior
1	- 102		4-3 Cleaning the Scan Area
1	- 103		4-4 Cleaning the Interior
1	- 103		4-5 Cleaning the Feeder Cover
1	- 104		4-6 Cleaning the Rubber Sheet / Paper Feed Rollor / Separate Rollor
1	- 104		4-7 Cleaning the Paper Feed Rollor
1	- 105		4-8 Cleaning the Bottom Plate
1	- 106	5.	Transportation
	Part 2: TECHNICAL REFERENCE
2	- 1	1.	New Technologies
2	- 3	2.	Cleaning Mode and Amount of Ink Purged
2	- 5	3.	Print Mode
2	- 9	4.	FAQ (Problems Specific to the MP750/MP780 and Corrective Actions)
	Part 3: APPENDIX
3	- 1	1.	Wiring Diagram
3	- 2	2.	Circuit Diagram
3	- 3	2-1 NCU Circuit Diagram1
3	- 4	2-2 NCU Circuit Diagram2
3	- 5	2-3 Relay Circuit Diagram
3	- 6	3.	Specification

Part 1

Maintenance

1. MAINTENANCE

1-1 Adjustment, Periodic Maintenance, Periodic Replacement Parts, and

Replacement Consumables by Service Engineer

(1) Adjustment

Adjustment	Timing	Purpose	Tool	Approx
Adjustment	Timing	Purpose	Tool	time
				time

ALL CLEAR	AtSPCNTBOARDASS’Y	To initialize settings other	None	1 min
(EEPROM	replacement	than the following	To initialize	1 min
(EEPROM	replacement	than the following	To initialize
initialization)		-1-touch speed dialing	the settings,
*1		(MP780 only)	select #8
		-Service/User soft SW	CLEAR–ALL
		(MP780 only)	in the service
		-Tx/Rx infomation	mode
		(MP780 only)
		-Various counters
		-TYPE Setting
TYPE settings	-AtSPCNTBOARDASS’Y	-To set the type	None	1 min
(EEPROM	replacement	-To set the destination	Select #5	1 min
(EEPROM	replacement	-To set the destination	Select #5
settings)	-AtexcecutingAllclear		TYPE in the
*1			service mode
			Power SW
			OFF/ON*1
Waste ink	At bottom case unit	To reset the waste ink	None	1min
counter resetting	replacement	counter.	Select #7	1min
counter resetting	replacement	counter.	Select #7
(EEPROM	At ink absorber INK		PRINTER in
settings)	ABSORBER		the service
	(HY7-2885/2886/2887/28		mode, and
	88/2889/2890/2891/2953)		input “0” at #5
			INK ABS
			CAPA.
Waste ink	At SPCNTBOARDASS’Y	Waste ink counter setting	None	1 imn
counter setting	replacement		Print out the	1 imn
counter setting	replacement		Print out the
(EEPROM			EEPROM
initialization)			information,
			and select #7
			PRINTER in
			the service
			mode.
			Then, register
			at #5 INK ABS
			CAPA.
CD-R sensor /	At SPCNTBOARDASS’Y	To correct the CD-R and	None.	1 min
automatic print	replacement	automatic print head	(Correction
head alignment	At carriage unit	alignment sensor.	performed
sensor correction	replacement		through
(EEPROM			FACTORY
settings)			MODE-[2]PRI
(230V only)			NTER-SHUK
			KEN at the
			same time as
			printing.)

1 - 1

Adjustment	Timing	Purpose	Tool	Approx
Adjustment	Timing	Purpose	Tool	time
				time

Print head	- At print head	To ensure accurate dot	None.(Main	2 min
alignment	replacement	placement.	body
	- At SPCNTBOARDASS’Y		buttons)
	replacement		Computer
			(settings via
			the printer
			driver)
Paper feed motor	-At paper feed motor unit	To adjust the belt tension.	None	2 min
position	replacement	(Position the paper	For the
adjustment*		feed motor so that the belt	adjustment,
		is stretched tight.)	refer to [3-3
*2			Adjustment/Se
			ttings
			(1) PAPER
			FEED
			MOTOR
			Installation
			Adjustment.
Grease	-At carriage unit	-To maintain sliding	-FLOIL	1 min
application	replacement	properties of the carriage,	KG-107A
	-At chassis' upper gear	carriage shaft, and shaft	-MOLYKOTE
	replacement	lift.	HP300
	-At LIFT CAM SHAFT	-To protect the chassis'
	replacement	upper gear.
		-To LIFT CAM SHAFT
		replacement

Note: DO NOT loosen the red screws on both sides of the main chassis, securing the carriage shaft positioning.

*1: When SPCNT BOARD ASS’Y isreplaced, be sure to select the settings of [#8CLEAR]-[ALL] and [#5TYPE] in Service Mode, and turn thepower OFF/ON with the Power button (Software Power: OFF/ON). DO NOT turn the power OFF/ON by removing and inserting the power code (Hardware Power: OFF/ON). In this case, data may not be written correctly.

*2: Red screws of paper feed motor

The red screws securing the paper feed motor may be loosened only at replacement of the paper feed motor unit.

(2) Periodic maintenance

Adjustment	Timing	Purpose	Tool	Approx.
				time

None

1 - 2

(3) Periodic replacement parts

	Adjustment	Timing			Purpose			Tool	Approx.
									time

	None

	(4) Replacement consumables

	Adjustment	Timing			Purpose			Tool	Approx.
									time

	None

1-2 Customer Maintenance
	Adjustment		Timing			Purpose		Tool	Approx.
	Adjustment		Timing			Purpose		Tool	time
									time

	Print head		At print head			To ensure accurate dot	None		3min
	alignment		replacement.			placement.	Main body
							buttons
							Computer
							(automatic
							settings
							via the printer
							driver)

	Print head cleaning		When print quality is			To improve nozzle	None		1 min
			not satisfying.			conditions.	Main body
							buttons
							Computer
							(settings via the
							printer driver)

	Print head deep		When print quality is			To improve nozzle	None		2min
	cleaning		not satisfying, and not			conditions.	Computer
			improved by print head				(setting via the
			cleaning.				printer driver)
							.
	Ink tank		When an ink	tank					2min
	replacement		becomes empty.(No ink			-	-
			error)
	Paper feed roller		When paper does not			To clean the paper feed	None		2min
	cleaning		feed properly.			rollers.	Main body
							buttons
	CD-R print position		At CD-R printing, when			To correct CD-R print	None		2min
	adjustment		necessary			position.	Computer
	(230V only)						(application
							software)

	Bottom plate		When the back side of			To clean the platen ribs.	None		1min
	cleaning		the paper is smeared				Computer
							(application
							software)

1 - 3

1-3 Product Life

(1) Main body

Specified print volume (a), (b), or the years of use (c), whichever comes first.

(a)Scanning Section: 15,000 pages

(b)Printing Section: 18,000 pages

Copy

FAX

1,500 character pattern + Post card

3,240 pages

3,780 pages

Address printing

(MP780)

3,420 pages

3,960 pages

(MP750)

1,500 character pattern

360 pages

(MP780)

Color

A4, 7.5% duty per color pattern

2,520 pages

2,880 pages

A4, photo, borderless printing

180 pages

360 pages

L, photo, borderless printing

1,080 pages

1,980 pages

Postcard, photo, borderless printing

360 pages

1,260 pages

5 years of use

(2) Ink tank

BCI-3eBK:

900 pages

(JEIDA STD patternJ1, plain paper standerd mode)

740 pages

(Black 1,500 character pattern, plain paper / standard mode)

1,300 pages

(ISO JIS-SCID No. 5 / plain paper / standard mode)

BCI-6C:

550 pages

(ISO JIS-SCID No. 5 / plain paper / standard mode)

BCI-6M:

430 pages

(ISO JIS-SCID No. 5 / plain paper / standard mode)

BCI-6Y:

360 pages

(ISO JIS-SCID No. 5 / plain paper / standard mode)

BCI-6BK:

2,000 pages

(ISO JIS-SCID No. 5 / plain paper / standard mode)

1-4 Special Tools

Name

Tool No.

Application

Remarks

MOLYKOTE

CK-8012-000

To be applied to the chassis' upper gear,

New

HP300

and to the sliding portion of the shaft lift.

FLOIL KG-107A

QY9-0057-000

To be applied to the sliding portion of the

In common with

carriage and the bearing portion

of the

other models.

carriage shaft.

1 - 4

1-5 Serial Number Label Location

On the right side of the backside in the bottom case (close to the rating plate)

Figure1-1 Serial Number Label Location

1 - 5

2. LIST OF ERROR DISPLAY / INDICATION

User error messages

Look for the applicable error message and execute the appropriate countermeasures.

Error Codes

As for the causes and countermeasures, only the error codes that are newly incorporated in the unit remedies unique to the product are included in New Error Codes and Recovery Methods. For the causes and countermeasures of other error codes, refer to the separate G3/G4 Facsimile Error Code List (Rev. 2).

Service error code output

When service data #1 SSSW SW01 Bit0 is set to “1”,the following service error codes are displayed when an error occurs.

2-1 User’s error messege

"CARTRIDGE JAMMED"

Printing position correction failed

Cause:	Carriage movement prevented by one of the following.
	Damaged shaft.
	Parts deformed. (Carriage or guide frame)
	Insufficient grease.

Solution: Replace the shaft.

	Replace the deformed parts.
	Apply more grease.
Cause:	Bi-directional print displacement correction failed because the carriage motor is
	out of step, or some similar reason.

Solution: Replace the carriage motor.

Home position error

Cause1: Tried to stop the carriage unit that has been moving or to move the carriage unit at a pouse by

force.

Solution1: Do not touch the carriage unit other than cartridge replacement position.

Cause2: Foreign body in carriage section.

Solution2: Open flatbed ass’y and remove the foreign body.

Cause3: Loose carriage belt.

Solution3: Replace carriage unit

Cause4: Carriage motor does not work.

Solution4 (1) Switch power OFF/ON.

(2) Replace carriage motor.

Cause5: The position of the carriage cannot be detected (due to smears on the carriage

encoder film or SPCNT board failure).

Solution5: (1) Switch power off/on.

(2)Wipe the carriage encoder film with a cloth soaked with alcohol.

(3)Replace the carriage encoder film.

(4)Replace the SPCNT board.

1 - 6

Note:

This error message means the same as service error codes ##338 and ##340. When this error occurs in this model, it is not treated as a service error, but as a user error, and the error message is displayed.

“COVER OPEN”

Cause:	You opened the scanning unit (printer cover) during an operation.
Solution:	Close the scanning unit (printer cover).
Cause:	Damaged scanner open arm ass’y, damaged scanner sensor arm, or SPCNT board ass’y failure.
Solution:	Replace the scanner open arm ass’y, replace the scanner sensor arm, or replace the SPCNT board
	ass’y.
“CHECK PRINTER (PRESS [OK])” (##334 - ##336, ##343, ##345, ##346, ##352, ##356 - ##362)
Cause:	The carriage unit does not move due to a foreign body in the carriage section.
Solution:	Open flatbed ass’y and remove the foreign body. If there is a paper jam, clear the paper jam.
Cause:	The printer’s internal unit has malfunctioned.
Solution:	Reinstall the BJ cartridge.
	Turn the power off and on.
	Check the service error code and refer to an appropriate solution.
Cause:	The waste ink tank (absorber) is nearly full.
Solution:	Replace the waste ink tank (absorber).

Note:

When replacing the waste ink absorber, you need to reset the waste ink volume counter. [Refer to 3-3 Adjustment/Settings (6) Service mode.]

“MEMORY FULL”

Cause:	The machine’s memory is full because you tried to copy a very detailed document.
Solution:	Divide the document and copy each part separately.
Cause:	The machine’s memory is full because it has received too many documents in the memory
	receiving mode. (MP780 only)
Solution:	Print out any documents, which are stored in memory. Then start the operation again. If the
	memory contains any documents you do not need, delete them.
“MEMORY CLEARED (PRESS [OK])”
Cause:	After receiving data in the memory receiving mode, the power is off due to a service interruption,
etc., and then the image data received in the memory receiving mode is cleared.
Solution:	Press [OK] to go back to the standby status.

1 - 7

Memo:

Until you press [OK] button, the machine displays this message continuously and you cannot perform any operations. The memory clear list of the cleared image data is not displayed in this machine. For the other party information, confirm in the communication management report.

1 - 8

2-2 User error code

The error codes that have newly been added starting with the product are identified by the notation “new” those error codes for which remedies unique to the product are offered are identified by the notation “UNQ (UNIQUE).”

No.	Tx or Rx	Definition	Remarks

#001	TX	Document has jammed
#003	TX/RX	Document is too long, or page time-over

#005	TX/RX	Initial identification (T0/T1) time-over

#009	RX	Recording paper has jammed or the recording
		paper has run out
#011	RX	Polling reception error

#012	TX	The other party has run out of recording paper

#018	TX/RX	Auto dialing transmission error
#021	RX	The other party has rejected the machine
		during polling reception

#022	TX	Call fails

#037	RX	Memory has overflowed when receiving
		images
#085	TX	Other party does not support ITU-T Color
		Faxing

#995	TX/RX	Memory Communication reservation
		cancellation

2-3 Service Call Errors
No.	Tx or Rx	Definition

##100	TX	The number allowed for retransmission of the procedure signal
		was exceeded during transmission
##101	TX/RX	The modem speed of the machine does not match that of the
		other party

##102	TX	Fallback is not possible

##103	RX	EOL cannot be detected for 5 sec (15 sec if CBT)
##104	TX	RTN or PIN has been received

##106	RX	The procedure signal cannot be received for 6 sec while in wait

##107	RX	The transmitting machine cannot be use fallback
##109	TX	After transmitting DCS, a signal other than DIS, DTC, FTT,
		CFR, and CRP was received, exceeding the permitted number
		of transmissions of the procedure signal

1 - 9

No.	Tx or Rx	Definition

##111	TX/RX	Memory error
##114	RX	RTN was transmitted

##200	RX	During image reception, a carrier is not detected for 5 sec
##201	TX/RX	DCN was received through a non-normal procedure

##204	TX	Receive DTC without Tx data

##220	TX/RX	System error (e.g., main program may have gone away)
##224	TX/RX	Fault occurred in the communication procedure signal

##226	TX/RX	Stack Pointer Not within RAM Range

##229	RX	The recording system became locked for 1 min
##232	TX	The IC used to control the encoder malfunctioned

##237	RX	The IC used to control the decoder malfunctioned

##238	RX	The unit used to control recording malfunctioned
##261	TX/RX	System error occurred between the modem and system control
		board

##280	TX	The number of re-transmissions of the procedure signal has
		been exceeded

##281	TX	The number of re-transmissions of the procedure signal has
		been exceeded
##282	TX	The number of re-transmissions of the procedure signal has
		been exceeded

##283	TX	The number of re-transmissions of the procedure signal has
		been exceeded

##284	TX	DCN has been received after transmission of TCF
##285	TX	DCN has been received after transmitting EOP

##286	TX	DCN has been received after transmitting EOM

##287	TX	DCN has been received after transmitting MPS
##288	TX	After transmitting EOP, a signal other than PIN, PIP, MCF,
		RTP, or RTN was received

##289	TX	After transmitting EOM, a signal other than PIN,PIP,MCF,
		RTP, or RTN was received

##290	TX	After transmitting MPS, a signal other than PIN,PIP,MCF,
		RTP, or RTN was received
##332	TX/RX	Printer control DRAM check error

##333	TX/RX	Printer control ROM check error

##334	TX/RX	Printer control EEPROM check error
##335	TX/RX	Data transmission error between the system control section and
		printer control section

1 - 10

No.	Tx or Rx	Definition

##336	TX/RX	BJ head abnormal temperature error

##337	RX	BJ head temperature sensor error
UNQ ##341	TX/RX	Maintenance Jet Waste Ink Tank Full

UNQ ##342	TX/RX	Cleaning absorption waste ink capacity full

UNQ ##343	TX/RX	Ink Detection Waste Ink Tank Full
##345	TX/RX	BJ cartridge head cleaning error

##346	TX/RX	Inside temperature error

NEW ##352	RX	Printer control EEPROM head information error
NEW ##355	RX	A motor to lift up for CD-R print is malfunctioned

NEW ##356	TX/RX	ASF cam sensor error

NEW ##357	TX/RX	ASF paper feed (AP) position error

NEW ##358	TX/RX	USB Host VBUS overcurrent error

NEW ##359	TX/RX	Paper feed position error

NEW ##360	TX/RX	Paper feed cam sensor error

NEW ##361	TX/RX	Valve sensor error

NEW ##362	TX/RX	Motor driver malfunctioned error

##670	TX	In V.8 late start, the V.8 ability was detected in DIS from the
		other party and, in response, CI was transmitted; however, the
		procedure failed to advance, causing a T1 time-over condition

##671	RX	In V.8 call arrives, the procedure fails to advance to phase 2
		after CM detection, causing a T1 time-over condition

##672	TX	In V.34 transmission, the procedure fails to move from phase 2
		to phase 3 and later, causing a T1 time-over condition

##673	RX	In V.34 reception, the procedure fails to move from phase 2 to
		phase 3 and later, causing a T1 time-over condition

##674	TX	In V.34 transmission, the procedure fails to move from phase 3
		or phase 4 to a control channel or later, causing a T1 time-over
		condition

##675	RX	In V.34 reception, the procedure fails to move from phase 3 or
		phase 4 to a control channel or later, causing a T1 time-over
		condition

1 - 11

No.	Tx/Rx	Definition

##750	TX	In ECM transmission, no significant signal can be received
		after transmission of PPS-NULL, and the allowed number of
		procedure signal re-transmissions was exceeded
##752	TX	In ECM transmission, DCN was received after transmission of
		PPS-NULL

##753	TX	In ECM transmission, the allowed number of procedure signal
		re-transmissions was exceeded or a T5 time-over (60 sec)
		condition occurred after transmission of PPS-NULL
##754	TX	In ECM transmission, the allowed number of procedure signal
		re-transmissions was exceeded after transmission of
		PPS-NULL

##755	TX	In ECM transmission, no significant signal can be received
		after transmission of PPS-MPS, and the allowed number of
		procedure signal re-transmissions was exceeded

##757	TX	In ECM transmission, DCN was received after transmission of
		PPS-MPS
##758	TX	In ECM transmission, the allowed number of procedure signal
		re-transmissions was exceeded or a T5 time-over (60 sec)
		condition occurred after transmission of PPS-MPS

##759	TX	In ECM transmission, the allowed number of procedure signal
		re-transmissions was exceeded after transmission of PPS-MPS

##760	TX	In ECM transmission, no significant signal can be received
		after transmission of PPS-EOM, and the allowed number of
		procedure signal re-transmissions was exceeded
##762	TX	In ECM transmission, DCN was received after transmission of
		PPS-EOM

##763	TX	In ECM transmission, the allowed number of procedure signal
		re-transmissions was exceeded or a T1 time-over (60 sec)
		condition occurred after transmission of PPS-EOM

##764	TX	In ECM transmission, the allowed number of procedure signal
		re-transmissions was exceeded after transmission of PPS-EOM
##765	TX	In ECM transmission, no significant signal can be received
		after transmission of PPS-EOM, and the allowed number of
		procedure signal re-transmissions was exceeded

##767	TX	In ECM transmission, DCN was received after transmission of
		PPS-EOM

1 - 12

No.	Tx or Rx	Definition

##768	TX	In ECM transmission, the allowed number of procedure signal
		re-transmissions was exceeded or a T5 time-over (60 sec)
		condition occurred after transmission of PPS-EOM

##769	TX	In ECM transmission, the allowed number of procedure signal
		re-transmissions was exceeded after transmission of PPS-EOM
##770	TX	In ECM transmission, no significant signal can be received
		after transmission of EOR-NULL, and the allowed number of
		procedure signal re-transmissions was exceeded

##772	TX	In ECM transmission, DCN was received after transmission of
		EOR-NULL

##773	TX	In ECM transmission, the allowed number of procedure signal
		re-transmissions was exceeded or a T5 time-over (60 sec)
		condition occurred after transmission of EOR-NULL
##774	TX	In ECM transmission, ERR was received after transmission of
		EOR-NULL

##775	TX	In ECM transmission, no significant signal can be received
		after transmission of EOR-MPS, and the allowed number of
		procedure signal re-transmissions was exceeded

##777	TX	In ECM transmission, DCN was received after transmission of
		EOR-MPS
##778	TX	In ECM transmission, the allowed number of procedure signal
		e-transmissions was exceeded or a T5 time-over (60 sec)
		ondition occurred after transmission of EOR-MPS

##779	TX	In ECM transmission, ERR was received after transmission of
		OR-MPS

##780	TX	In ECM transmission, no significant signal can be received
		after transmission of EOR-EOM, and the allowed number of
		rocedure signal re-transmissions was exceeded
##782	TX	In ECM transmission, DCN was received after transmission of
		OR-EOM

##783	TX	In ECM transmission, the allowed number of procedure signal
		re-transmissions was exceeded or a T5 time-over (60 sec)
		condition occurred after transmission of EOR-EOM

##784	TX	In ECM transmission, ERR was received after transmission of
		OR-EOM

1 - 13

No.	Tx/Rx	Definition

##785	TX	In ECM transmission, no significant signal can be received
		after transmission of EOR-EOP, and the allowed number of
		procedure signal re-transmissions was exceeded
##787	TX	In ECM transmission, DCN was received after transmission of
		OR-EOP

##788	TX	In ECM transmission, the allowed number of procedure signal
		retransmissions was exceeded or a T5 time-over (60 sec)
		condition occurred after transmission of EOR-EOP
##789	TX	In ECM transmission, ERR was received after transmission of
		EOR-EOP

##790	RX	In ECM reception, ERR was transmitted after reception of
		EOR-Q

##791	TX/RX	During an ECM mode procedure, a signal other than a
		significant signal was received
##792	RX	In ECM reception, PPS-NULL between partial pages cannot be
		detected

##793	RX	In ECM reception, no effective frame was detected while
		signals were received at high speed, and a time-over condition
		occurred

2-4 New Error Codes and Recovery Methods

Those error codes that have been added starting with the product and those error codes for which remedies unique to the product are offered are shown together with causes and remedies, where applicable.

##341 Maintenance jet waste ink capacity full

Solution: Replace the waste ink absorber as follows in the error occurs:

(1)Select [7] PRINTER TEST in the service mode and select [5] INK ABS CAPA under the [7], then input “0”.

(2)Check to make sure that no image exist in memory; then, turn off the power, remove the appropriate parts, and replace the waste ink absorber.

##342 Cleaning absorption waste ink capacity full

Solution: Replace the waste ink absorber as follows in the error occurs:

(1) Select [7] PRINTER TEST in the service mode and select [5] INK ABS CAPA under the [7], then input “0”.

1 - 14

(2) Check to make sure that no image exist in memory; then, turn off the power, remove the appropriate parts, and replace the waste ink absorber.

##343 Ink detection waste ink capacity full

Solution: Replace the waste ink absorber as follows in the error occurs:

(1)Select [7] PRINTER TEST in the service mode and select [5] INK ABS CAPA under the [7], then input “0”.

(2)Check to make sure that no image exist in memory; then, turn off the power, remove the appropriate parts, and replace the waste ink absorber.

##352 Printer control EEPROM head information error Cause: The EEPROM for printer control is faulty. Solution: (1) Turn off and then on the power.

(2)Turn off the power, and replace the print head.

(3)Replace the SPCNT board.

NOTE:

In the presence of ##352, the carriage unit will not move to print head replacement position even when the inner cover is opened. Moreover the carriage will not be locked in position even when the power is turned off. When replacing the print head, be sure to turn off the power, and draw out the carriage before replacement.

##355 Lit-up motor for CD-R print malfunctioned

Cause: In performing a CD-R print, the motor to lift up the carriage shaft is malfunctioned. Solution: (1) Turn off and then on the power.

(2)Check the connection from the SHEET FEED unit to the SPCNT board ass’y (JPM1).

(3)Replace the SHEET FEED ASS’Y.

(4)Replace the SPCNT board.

##356 ASF cam sensor error

Cause: An error occurs at the ASF cam sensor in the ASF (Auto Sheet Feeder) unit.