Samsung SCX-4725FN Bedienungsanleitung

Manual

SERVICE

DIGITAL LASER MFP

SCX-4725FN Series

SCX-4725FN/XAZ

Basic Model :SCX-4725FN

DIGITAL LASER MFP The keynote of Product

- Machine Life: 50,000Pages

- Cpu: Chorus M

- Device Memory: 32MB

- Resolution: 1200x1200dpi

- Option: N/A

- Printing Speed: 24ppm(A4, LTR)

- Print Language: PCL

- Path Type: C-Path

- Cassette Capa.: 250sheets

- Outlet Stacking Capa.: 100sheets

- Toner Cartridge: initial(1.5K), sales(3K)

- ADF Capacity: 30sheets

- Scan Method: 600 dpi Color CIS

- Copy Speed: SDMC: 22Cpm/Ltr,

MDMC: 7Cpm/Ltr

- Interface: USB2.0

SCX-4725FN Series

Contents

1. Precautions

1.1 Safety Warning 1-1

1.2 Caution for safety 1-2

1.3 ESD Precautions 1-5

1.4 Super Capacitor or Lithium Battery Precautions 1-5

2. Product Specification

2.1 Product Overview 2-1

2.2 Specifications 2-2

2.3 Model Comparison Table 2-8

3. System Overview

3.1 System Layout 3-1

3.2 Engine H/W Specification 3-5

3.3 Deverope Process 3-12

3.4 Sanner Part 3-13

3.5 OPE(Operational Panel Equipment) 3-15

3.6 SMPS & HVPS 3-16

3.7 FUSER AC POWER CONTROL 3-18

4. Alignment and Adjustments

4.1 User Mode 4-1

4.2 Tech Mode and Setting 4-4

4.3 Control Panel 4-13

4.4 LCD Status Error Massages 4-15

4.5 Engine Test Mode 4-17

4.6 Paper Path and Clearing Paper Jams 4-19

Continued

5. Disassembly and Reassembly

5.1 General Precautions on Disassembly 5-1

5.2 MP Tray 5-2

5.3 Pick Up Roller 5-3

5.4 Front Cover 5-3

5.5 Cassette Tray 5-4

5.6 Rear Cover 5-5

5.7 Right Cover 5-6

5.8 Left Cover 5-7

5.9 Scan Ass'y 5-8

5.10 ADF Housing 5-9

5.11 OPE Unit 5-11

5.12 Platen Housing 5-12

5.13 Middle Cover 5-14

5.14 HVPS 5-15

5.15 Main PBA 5-16

5.16 RX Drive 5-17

5.17 Fuser Unit 5-18

5.18 Engine Shield (With LIU PBA, SMPS) 5-21

5.19 LSU 5-22

5.20 Paper Path Frame 5-23

5.21 CRUM Harness 5-25

6. Troubleshooting

6.1 Checking Symptoms 6-1

6.2 Bad discharge 6-4

6.3 Set Malfunction – Causes and Solutions 6-8

6.4 Bad Software Environment 6-12

6.5 Bad image 6-16

6.6 Fax & Phone Problems 6-23

Continued

6.7 Copy Problems 6-27

6.8 Scanning Problems – Causes and Solutions 6-29

6.9 Toner Cartridge Service 6-30

6.10 Software Problems – Causes and Solutions 6-32

6.11 Windows Problems 6-36

6.12 SyncThru Installation Problems 6-37

7. Exploded Views & Parts List

7.1 Main 7-2

7.2 Cover Housing 7-3

7.3 Front Cover 7-4

7.4 Rear Cover 7-5

7.5 Frame Ass'y 7-6

7.6 ADF Ass'y 7-7

7.7 Platen Cover Ass'y 7-8

7.8 Platen Ass'y 7-9

7.9 OPE Unit 7-10

7.10 RX Drive Unit 7-11

7.11 MP Tray 7-12

7.12 Fuser Unit 7-13

7.13 Paper Path Ass'y 7-14

7.14 Pick Up Unit 7-15

8. Block diagram

8.1 System Block Diagram 8-1

Continued

9. Connection Diagram

9.1 Connection Diagram 9-1

10. Reference Information

10.1 Troubleshooting Tools 10-1

10.2 Acronyms and Abbreviations 10-2

10.3 Selecting printer locations 10-4

10.4 Sample Tests Patterns 10-5

11. Circuit Description

11.1 Engine Controller 11-1

11.2 System Overview 11-7

Samsung Electronics

Service Manual

Troubleshooting

6-2

6.1.1 Basic Check List

1. Check the Power.

• Does "Warming Up" appear on the display?

--> If not check power cable, switch or SMPS.

--> Does the wall socket work?

• Do the Motors or other components initialize (listen for main motor, fan and LSU sounds)?

--> If not or there are none of the normal startup sounds check cable, switch or SMPS.

--> Does the wall socket work?

2. Check the LCD Panel.

• Is there any display at all?

--> If not check power cable, switch or SMPS.

--> Does the wall socket work?

• Is the display a meaningful message care there any broken or badly formed characters?

--> Check the main PBA and cable harness.

• Is the message on the LCD Panel a standard error message?

--> Refer to section 4.3

3. Check the Paper Path

• Is there a Paper Jam?

--> Remove any paper fragments caught in the paper path.

• Paper Jam occurs repeatedly at a specific point in the Paper Path

--> Open the fuser cover, Jam clear.

--> Dismantle the machine and carefully inspect the region where the jam occurs.

(Especially, check if paper fragments are caught in the Fuser

4. Print the Information Page (Configuration).

• Try printing a test page from a computer.

--> If there is an error check cables and driver installation.

5. Check the Print Quality.

•Is there are a Print Quality Problem?

--> Refer to section 6.5

6. Check consumables (toner etc.).

•Using the keys print the Test Pattern.

--> Expected life of various consumable parts, compare this with the figures printed and replace as required

Exploded Views & Parts List

Samsung Electronics Service Manual

7-1

7.1 Main 7-2

7.2 Cover Housing 7-3

7.3 Front Cover 7-4

7.4 Rear Cover 7-5

7.5 Frame Ass'y 7-6

7.6 ADF Ass'y 7-7

7.7 Platen Cover Ass'y 7-8

7.8 Platen Ass'y 7-9

7.9 OPE Unit 7-10

7.10 RX Drive Unit 7-11

7.11 MP Tray 7-12

7.12 Fuser Unit 7-13

7.13 Paper Path Ass'y 7-14

7.14 Pick Up Unit 7-15

7. Exploded Views and Parts List

Contents

SAMSUNG Laser SCX-4725 sm_06.pdf

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