Brother FAX-8650P

FAX3750/FAX-8650P/MFC7750

Appendix 2. Circuit Diagrams

A. Main PCB

B. Modem PCB

C. Network Control Unit (NCU) PCB

D. Control Panel PCB

E. Power Supply PCBs

Contents

Main Page PREFACE SAFETY INFORMATION Page Page 1. EQUIPMENT OUTLINE I - 2 2. SPECIFICATIONS (1/2) I - 3 (1/2) I - 4 (2/2) I - 5 (2/2) Page Page 1. INSTALLING THE UPDATE DATA TO THE FACSIMILE EQUIPMENT Connecting the equipment to your computer Installing the update data onto the flash ROM of the facsimile equipment Page Page Page 2. MECHANISMS Page Page Page Page Page Page Page Page Page III - 12 3. CONTROL ELECTRONICS 3.1 Configuration The hardware configuration of the facsimile equipment is shown below. Configuration of Facsimile Equipment Page Page Page Page Page Page Page Page Page 1. DISASSEMBLY/REASSEMBLY IV - 2 Tightening Torque List Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page IV - 39 Page Page Page Page Page IV - 45 2. LUBRICATION Apply the specified lubricants to the lubrication points as shown below. [ 1 ] Document feed roller ASSY and document ejection roller ASSY Page Page Page Page 1. ENTRY INTO THE MAINTENANCE MODE 2. LIST OF MAINTENANCE-MODE FUNCTIONS Page 3. DETAILED DESCRIPTION OF MAINTENANCE-MODE FUNCTIONS Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page 1. ERROR INDICATION Page Page Page Page Page Page Page Page Page Page Page Page Page 2. TROUBLESHOOTING Page Page Page Page Page Page Page VI - 23 Location of High-voltage Contacts and Grounding Contacts Grounding Contacts High-voltage Contacts Page Page EEPROM Customizing Codes n EEPROM Customizing Codes List Page Page # 5 ( ) # 5 AMain PCB 1/7 () ( ) AMain PCB 2/7 # 3 () AMain PCB 3/7 B G 3 0 8 0 / 2 AMain PCB 4/7 # 9 + 5 V M O D E M P 1 5 AMain PCB 5/7 5 6 7 9 1 0 1 2 1 1 P 5 ) # 2 AMain PCB 6/7 ******* * * * * * * * ( ) SPAMP AMain PCB 7/7 N O T A S S Y F A X 3 7 5 0 , M F C 7 7 5 0 9 BModem PCB 1/2 # 1 M A I N P 1 2 ( ) M A I N P 1 4 BModem PCB 2/2 ( ) () ( ) ( ) CNCU (U.S.A./Canada) CNCU PCB 1/2 FAX-8650P (Germany/U.K./Norway/ Switzerland/Sweden) FAX3750 (Australia/New Zealand) I T E M L 1 S P 3 S P 5 CNCU PCB 2/2 C 8 S P 9 S P 1 3 S P 1 0 CNCU PCB (Belgium/Netherlands) ( ) ( ) ( ) ( ) CNCU PCB (France) DControl Panel 1/2 (FAX3750) DControl Panel 1/2 (FAX-8650P/MFC7750) K I 0 K I 1 K I 2 K I 3 K I 4 DControl Panel 2/2 2 5 5432