Konica Minolta LT-203 User Manual

SERVICE MANUAL

MODEL

LT-203

Large Capacity Tray Unit

NOVEMBER 2002

CSM-LT203

LT-203

SERVICE MANUAL

Used On Model 7145

November 2002

IMPORTANT NOTICE

Because of the possible hazards to an inexperienced person servicing this equipment, as well as the risk of damage to the equipment, Konica Business Technologies strongly recommends that all servicing be performed by Konica-trained service technicians only.

Changes may have been made to this equipment to improve its performance after this service manual was printed. Accordingly, Konica Business Technologies, Inc., makes no representations or warranties, either expressed or implied, that the information contained in this service manual is complete or accurate. It is understood that the user of this manual must assume all risks or personal injury and/or damage to the equipment while servicing the equipment for which this service manual is intended.

Corporate Publishing Department

© 2002, KONICA BUSINESS TECHNOLOGIES, INC. All rights reserved.

Printed in U.S.A.

CONTENTS

CONTENTS

SAFETY AND IMPORTANT WARNING ITEMS

Refer to the 7145 service manual on page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-1

IOUTLINE

1. LT-203 PRODUCT SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 2. CENTER CROSS-SECTIONAL DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 3. DRIVE SYSTEM DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 3.1 Rear side drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 3.2 Front side drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

II UNIT EXPLANATION

1. PAPER FEED SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 1.1 Composition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 1.2 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 1.2.1 Tray up drive control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 1.2.2 Paper feed control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 1.2.3 Remaining paper detection control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

III DISASSEMBLY/ASSEMBLY

1. PAPER FEED SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 1.1 Removing the LT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 1.2 Removing the right, front and rear covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 1.3 Replacing the feed rubber and the paper feed rubber. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 1.4 Replacing the double feed prevention rubber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 1.5 Replacing the wire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

I OUTLINE

III DIS./ASSEMBLY II UNIT EXPLANATION

iii

CONTENTS

I OUTLINE

III DIS./ASSEMBLY II UNIT EXPLANATION

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iv

		LT-203 PRODUCT SPECIFICATIONS
I	OUTLINE
1. LT-203 PRODUCT SPECIFICATIONS
A.	Type
Type:		Side mount type large capacity paper feed tray
B.	Functions
Paper size:		A4, 8.5 x 11
Applicable copy paper:		60g/m2 to 105g/m2 (16lbs to 24lbs), high-quality paper
Maximum tray capacity:		2000 sheets (80g/m2 or 20lbs)
C. Machine data
Power source:		24VDC/5V (supplied from the main body)
Power consumption:		Maximum 31VA (with no internal heater used)
Weight:		Approx. 13kg
Dimensions:		339mm (W) x 515mm (D) x 299mm (H)
D.	Maintenance and life
Maintenance:		Same as the main body
Machine service life:		Same as the main body
E.	Operating environment
Temperature:		10°C to 30°C (50°F to 86°F)
Humidity:		10% RH to 80% RH

Note:

• The information herein may be subject to change for improvement without notice.

I OUTLINE

1-1

I OUTLINE

CENTER CROSS-SECTIONAL DIAGRAM

2. CENTER CROSS-SECTIONAL DIAGRAM

[3]

[4]

[5]

[2]

[1]

[1]	Double feed prevention roller	[4]	Paper feed roller
[2]	Conveyance roller	[5]	Paper lift plate

[3]Feed roller

1-2

DRIVE SYSTEM DIAGRAM

3. DRIVE SYSTEM DIAGRAM

3.1Rear side drive

[4]

[3]

[2]

			[1]
[1]	Paper lift plate	[3]	M150 (LT paper feed motor)
[2]	M151 (Tray up drive motor)	[4]	Conveyance roller

3.2Front side drive

[3]

[2]

[1]

[1] SD151 (LT paper feed solenoid)

[3] Feed roller

[2]Conveyance roller

I OUTLINE

1-3