Brother International HL 760 Service Manual - Page 4

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CONTENTS CHAPTER I FEATURES AND SPECIFICATIONS 1. FEATURES 2. SPECIFICATIONS 2.1 Printing 2.2 Functions 2.3 Electrical and Mechanical 2.4 Paper Specification 2.5 Print Delivery 2.6 Paper 2.7 Effective Printing Area 3. SAFETY INFORMATION 3.1 Laser Safety (110 - 120V Model only)) 3.2 CDRH Regulations (110 -120V Model only) 3.3 Caution for Laser Product CHAPTER II THEORY OF OPERATION 1. ELECTRONICS 1.1 General Block Diagram 1.2 Main PCB Block Diagram 1.3 Main PCB 1.3.1 CPU Core 1.3.2 ASIC 1.3.3 ROM 1.3.4 DRAM 1.3.5 Optional RAM 1.3.6 Optional Serial I/O 1.3.7 EEPROM 1.3.8 Reset Circuit 1.3.9 CDCC I/O 1.3.10 Engine I/O 1.3.11 Paper Feed Motor Drive Circuit 1.4 Panel Sensor PCB 1.5 Power Supply 2. MECHANICS 2.1 Overview of printing mechanism 2.2 Paper Transfer 2.2.1 2.2.2 2.2.3 Paper Supply Paper Registration Paper Eject 2.3 Sensors 2.3.1 Cover Sensor 2.3.2 Toner Empty Sensor 2.4 Drum Unit 2.4.1 2.4.2 2.4.3 2.4.4 Photosensitive Drum Primary Charger Developer Roller Transfer Roller I-1 1-1 1-3 1-3 1-3 . 1-4 Refer to HL-730 (P. 1-7) Refer to HL-730 (P.1-7) Refer to HL-730 (P.I-7) Refer to HL-730 (P. 1-8) Refer to HL-730 (P.I-10) Refer to HL-730 (P.1-10) Refer to HL-730 (P1-10) Refer to HL-730 (P I-11) II-1 11-1 11-1 11-2 11-3 11-3 11-4 11-7 11-8 11-9 II-10 11-10 11-11 11-11 11-12 11-13 Refer to HL-730 (P. 11-22) Refer to HL-730 (P11-23) Refer to HL-730 (P.I1-24) Refer to HL-730 (P. 11-24) Refer to HL-730 (P. 11-25) Refer to HL-730 (P11-25) Refer to HL-730 (P. 11-25) Refer to HL-730 (P. 11-26) Refer to HL-730 (P. 11-27) Refer to HL-730 (P. 11-27) Refer to HL-730 (P11-27) Refer to HL-730 (P. 11-28) Refer to HL-730 (P11-28) Refer to HL-730 (P. 11-28) Refer to HL-730 (P. 11-28) Refer to HL-730 (P 11-28)

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CONTENTS
CHAPTER
I
FEATURES
AND
SPECIFICATIONS
I-1
1.
FEATURES
1-1
2. SPECIFICATIONS
1-3
2.1
Printing
1-3
2.2
Functions
1-3
2.3
Electrical
and
Mechanical
.
1-4
2.4
Paper
Specification
Refer
to
HL
-730
(P.
1-7)
2.5
Print
Del
ivery
Refer
to
HL
-730
(P.
1-7)
2.6
Paper
Refer
to
HL
-730
(P.
I-7)
2.7
Effective
Printing
Area
Refer
to
HL
-730
(P.
1-8)
3.
SAFETY
INFORMATION
Refer
to
H
L-730
(P.
I-10)
3.1
Laser
Safety
(110
-
120V
Model
only))
Refer
to
HL
-730
(P.
1-10)
3.2
CDRH
Regulations
(110
-120V
Model
only)
Refer
to
HL
-730
(P1-10)
3.3
Caution
for
Laser
Product
Refer
to
HL
-730
(P
I-11)
CHAPTER
II
THEORY
OF
OPERATION
II
-1
1.
ELECTRONICS
1
1-1
1.1
General
Block
Diagram
1
1-1
1.2
Main
PCB
Block
Diagram
1
1-2
1.3
Main
PCB
1
1-3
1.3.1
CPU
Core
1
1-3
1.3.2
ASIC
1
1-4
1.3.3
ROM
1
1-7
1.3.4
DRAM
1
1-8
1.3.5
Optional
RAM
1
1-9
1.3.6
Optional
Serial
I/O
II
-10
1.3.7
EEPROM
1
1-10
1.3.8
Reset
Circuit
1
1-11
1.3.9
CDCC
I/O
1
1-11
1.3.10
Engine
I/O
1
1-12
1.3.11
Paper
Feed
Motor
Drive
Circuit
1
1-13
1.4
Panel
Sensor
PCB
Refer
to
HL
-730
(P.
1
1-22)
1.5
Power
Supply
Refer
to
HL
-730
(P1
1-23)
2.
MECHANICS
Refer
to
HL
-730
(P.
I
1-24)
2.1
Overview
of
printing
mechanism
Refer
to
HL
-730
(P.
1
1-24)
2.2
Paper
Transfer
Refer
to
HL
-730
(P.
1
1-25)
2.2.1
Paper
Supply
Refer
to
HL
-730
(P1
1-25)
2.2.2
Paper
Registration
Refer
to
HL
-730
(P.
1
1-25)
2.2.3
Paper
Eject
Refer
to
HL
-730
(P.
1
1-26)
2.3
Sensors
Refer
to
HL
-730
(P.
1
1-27)
2.3.1
Cover
Sensor
Refer
to
HL
-730
(P.
1
1-27)
2.3.2
Toner
Empty
Sensor
Refer
to
HL
-730
(P1
1-27)
2.4
Drum
Unit
Refer
to
HL
-730
(P.
1
1-28)
2.4.1
Photosensitive
Drum
Refer
to
HL
-730
(P1
1-28)
2.4.2
Primary
Charger
Refer
to
HL
-730
(P.
1
1-28)
2.4.3
Developer
Rol
ler
Refer
to
HL
-730
(P.
1
1-28)
2.4.4
Transfer
Rol
ler
Refer
to
HL
-730
(P
1
1-28)