Brother HL-600 Series User manual

MECHANICS & ELECTRONICS
SERVICE MANUAL
LASER PRINTER

PREFACE
This service manual contains basic information required for after-sales service of the laser printer (here-
in-after referred to as "this machine" or "the printer"). This information is vital to the service technical in
maintaining the high printing quality and performance of the printer.
This service manual covers both HL-630 / HL-631/ HL-641,645 / 650 / 655M.
This manual consists of the following chapters:
CHAPTER I : FEATURES AND SPECIFICATIONS
Features, specifications, and operation.
CHAPTER II : THEORY OF OPERATION
Basic operation of the mechanical system, the electrical system and the electrical
circuit, and their timing.
CHAPTER III : DISASSEMBLY AND REASSEMBLY
Procedures of disassembling and reassembling the mechanical system.
CHAPTER IV : TROUBLESHOOTING
Reference values and adjustment, troubleshooting for image defects, troubleshooting
for malfunctions, etc.
Informationinthismanualissubjecttochangeduetoimprovementorre-designoftheproduct.Allrelevant
information in such cases will be supplied in service information bulletins (Technical Information).
A through understanding of this printer, based on information on this service manual and service
information bulletins, is required for maintaining its quality performance and fostering the practical ability
to find the cause of troubles.

i
CONTENTS
CHAPTER I FEATURES AND SPECIFICATIONS
1 FEATURES .................................................................................................................... I-1
2 SPECIFICATIONS............................................................................................................... I-2
2.1 Printing .................................................................................................................... I-2
2.2 Functions ................................................................................................................... I-2
2.3 Electrical and Mechanical .......................................................................................... I-2
2.4 Paper Specification.................................................................................................... I-4
2.5 Print Delivery ............................................................................................................. I-4
2.6 Paper .................................................................................................................... I-4
2.7 Effective Printing Area ............................................................................................... I-5
3 SAFETY INFORMATION .................................................................................................... I-7
3.1 Laser Safty (110 - 120V Model only) ......................................................................... I-7
3.2 CDRH Regulations (110 - 120V Model only) ............................................................. I-7
3.3 Caution for Laser Product.......................................................................................... I-8
CHAPTER II THEORY OF OPERATION
1 ELECTRONICS .................................................................................................................. II-1
1.1 General Block Diagram............................................................................................. II-1
1.2 Main PCB Block Diagram ......................................................................................... II-2
1.3 Main PCB.................................................................................................................. II-3
1.3.1 CPU ............................................................................................................ II-3
1.3.2 ASIC ........................................................................................................... II-4
1.3.3 ROM ........................................................................................................... II-7
1.3.4 RAM ........................................................................................................... II-7
1.3.5 Optional RAMs ........................................................................................... II-8
1.3.6 Optional Serial I/O ...................................................................................... II-8
1.3.7 EFPROM .................................................................................................... II-9
1.3.8 Reset Circuit............................................................................................... II-9
1.3.9 CDCC I/O ................................................................................................... II-9
1.3.10 Engine I/O ................................................................................................ II-10
1.4 Driver PCB .............................................................................................................. II-11
1.4.1 Paper Feed Motor Drive Circuit................................................................ II-11
1.4.2 Solenoid (Pick-up,Clutch), Erase Lamp, Fan Motor Drive Circuit ............ II-11
1.4.3 Operation Panel ....................................................................................... II-12
1.4.4 Scanner Motor, Laser Sensors(Registration, Paper Eject, Toner),
Thermistor, High-voltage Power Supply................................................... II-12
1.5 Power Supply.......................................................................................................... II-13
2 MECHANICS ................................................................................................................. II-14
2.1 Overview of printing mechanism............................................................................. II-14
2.2 Paper Transfer........................................................................................................ II-15
2.2.1 Paper Supply ............................................................................................ II-15
2.2.2 Paper Registration.................................................................................... II-15
2.2.3 Paper Eject............................................................................................... II-16
2.3 Sensors ................................................................................................................. II-17
2.3.1 Multi Purpose Tray (MPT) Sensor............................................................ II-17
2.3.2 Cover Sensor ........................................................................................... II-17
2.3.3 Toner Empty Sensor ................................................................................ II-17
2.4 Process Unit ........................................................................................................... II-18
2.4.1 Photosensitive Drum ................................................................................ II-18
2.4.2 Primary Charger ....................................................................................... II-18
2.4.3 Developer Roller....................................................................................... II-18
2.4.4 Transfer Roller.......................................................................................... II-18
2.4.5 Cleaner Blade........................................................................................... II-18

ii
2.4.6 Toner Auger ............................................................................................. II-18
2.4.7 Erase Lamp .............................................................................................. II-18
2.5 Print Process .......................................................................................................... II-18
2.5.1 Charging ................................................................................................... II-18
2.5.2 Exposure Stage........................................................................................ II-19
2.5.3 Developing ............................................................................................... II-20
2.5.4 Transfer .................................................................................................... II-20
2.5.5 Drum Cleaning Stage ............................................................................... II-21
2.5.6 Erasing Stage........................................................................................... II-21
CHAPTER III DISASSEMBLY AND REASSEMBLY
1 SAFETY PRECAUTIONS................................................................................................. III-1
2 DISASSEMBLING FLOW ................................................................................................. III-2
3 DISASSEMBLING PROCEDURE ..................................................................................... III-3
3.1 Multi-purpose Paper Tray ........................................................................................ III-3
3.2 Process Unit ............................................................................................................ III-3
3.3 Top Cover................................................................................................................ III-4
3.4 Main Cover .............................................................................................................. III-5
3.5 Upper Shoot Cover.................................................................................................. III-6
3.6 Fixing Unit................................................................................................................ III-6
3.7 Scanner Unit ............................................................................................................ III-7
3.8 Fan Guard................................................................................................................ III-7
3.9 Interlock Levers ....................................................................................................... III-8
3.10 Fan Motor ................................................................................................................ III-8
3.11 Registration Sensor PCB......................................................................................... III-8
3.12 Solenoid P ............................................................................................................... III-9
3.13 Gear Shaft Plate ...................................................................................................... III-9
3.14 Gears ................................................................................................................ III-10
3.15 Main Motor Unit ..................................................................................................... III-11
3.16 Solenoid C ............................................................................................................. III-11
3.17 Main PCB............................................................................................................... III-12
3.18 Base Plate ............................................................................................................. III-12
3.19 Driver PCB............................................................................................................. III-14
3.20 Power Supply PCB ................................................................................................ III-14
3.21 High-voltage Power Supply ................................................................................... III-15
3.22 Tray Extention........................................................................................................ III-15
3.23 Paper Eject Tray.................................................................................................... III-16
3.24 Filter Cover ............................................................................................................ III-16
4 PACKING ................................................................................................................ III-17
CHAPTER IV TROUBLE SHOOTING
1 INTRODUCTION ...............................................................................................................IV-1
1.1 Initial check..............................................................................................................IV-1
1.2 Basic Procedure ......................................................................................................IV-2
2 IMAGE DEFECTS .............................................................................................................IV-3
2.1 Image Defect Example ............................................................................................IV-3
2.2 Troubleshooting Image Defect.................................................................................IV-4
3 TROUBLESHOOTING OF MALFUNCTIONS.................................................................IV-12
4 INSPECTION MODE .......................................................................................................IV-17
4.1 Inspection mode 1 .................................................................................................IV-17
4.2 Inspection Pattern 1...............................................................................................IV-17
4.3 Inspection mode 2 .................................................................................................IV-19
4.4 Initialization of NV-RAM.........................................................................................IV-19
4.5 Error codes ............................................................................................................IV-20

I - 1
CHAPTER I FEATURES AND SPECIFICATIONS
1 FEATURES
This printer has the following features:
300dpi Resolution and 6ppm Printing Speed
300dotsperinch(dpi)withmicrofinetonerandsixpagesperminute(ppm)
printing speed (Letter paper).
Versatile Paper Handing
The printer has a multi-purpose sheet feeder and straight paper path
mechanism. Using this mechanism, you can load A4, letter, legal, B5, A5
andexecutivesizeofpaper,andvarioustypesofpaperincludingenvelopes,
postcard, organizer paper, andyourcustompapersize.Themulti-purpose
sheetfeederalsoallowsmanualpaperloading,soyoucanalsouselabels.
Remote Printer Console Program for DOS
Theutilityprogram,RemotePrinterConsole,isavailableonthefloppydisk
supplied with your printer. When you operate your computer in the DOS
(DiskOperatingSystem)environment,thisallowsyoutoeasilychangethe
default setting of the printer such as fonts, page setup, emulations and so
on. This program also provides a status monitor program, which is a
Terminate-and-Stay Resident (TSR) program. It can monitor the printer
status while running in the background and report the current status or
errors on your computer screen.
Popular Printer Emulation Support
This printer supports three printer emulation modes, HP LaserJet IIP,
Epson FX-850, and IBM Proprinter XL. When you use DOS application
software or WindowsTM version 3.0 or earlier, you can use any of these
emulationstooperatetheprinter.TheprinteralsosupportsAuto-emulation
switching between HP and Epson or HP and IBM. If you want to fix the
printer emulation, you can do it using the Remote Printer Console
Program.
Bi-Directional Parallel Interface
The parallel interface of this printer allows bi-directional communication
withacomputer.Thisinterface allowsthe printer to communicate back to
the computer useful information such as the amount of memory installed,
and other printer setup conditions. As the supplied Remote Printer
Console program or WindowsTM 3.1 driver supports the bi-directional
mode, they can both report the printer status.
Optional Macintosh Interface (Standard in some countries)
The optional Macintosh serial interface kit is available with a driver, which
allows your printer to be connected to Macintosh computers. With this
option, you can use your printer with both an IBM PC, or its clone, and a
Macintosh at the same time. This optional interface board can be used as
a RS-422A interface for Macintosh or a RS-232C serial interface for IBM
PC or compatible.
Enhanced Memory Management
The printer has it's own data Compression Technology, which can
automaticallycompressgraphicdataanddownloadedfontdataefficiently
into the printer memory . You can avoid memory errors and print most
fullpage 300 dpi graphic and text data, including large fonts, with printer's
standard memory.

I - 2
2 SPECIFICATIONS
2.1 Printing
Print Method Electrophotography by semiconductor laser beam scanning
Resolution 300 dots/inch
Print Speed 6page/minute(whenloadingLetter-sizepaperfromthemulti-
purpose sheet feeder)
Warm-Up Max. 1 minute at 23°C (73.4°F)
First Print 20 seconds (when loading Letter-size paper from the multi-
purposesheet feeder)
Print Media Toner in a cartridge
Life Expectancy: 3,000 pages/cartridge (when printing A4 or
letter -size paper at 4% print coverage)
Developer Drum unit, separated from toner cartridge (when printing A4
orletter-sizepaperat4%printcoveragein continuousprinting.)
Download Fonts Acceptable
True Type Fonts on disks True TypeTM-compatible soft-fonts for WindowsTM on supplied
disk
2.2 Functions
CPU MC68EC000 16 MHz
Emulation AutomaticemulationselectionamongHPLaserJetIIP,EPSON
FX-850, and IBM Proprinter XL
Printer Driver WindowsTM3.1driver,supportingBrotherNativeCompression
mode and bi-directional capability.
Optional Macintosh® QuickDraw driver (Standard in some
countries.)
Interface Bi-directional Centronics parallel.
RS-422A/RS-232C serial interface is optionally available.
(The serial interface is a standard in some countries.)
Memory 1.0 or 2.0 MB (subject to the printer model) with Data
Compression Technology.
Expandable up to 2.0 MB with the optional memory board.
Control Panel 2 switches and 4 lamps
Diagnostics Self-diagnostic program
2.3 Electrical and Mechanical
Power Source U.S.A. and Canada : AC 110 to 120 V, 60Hz
Europe and Australia: AC 220 to 240 V, 50Hz
Power Consumption Printing: 480 W or less
Standing by: 60 W or less
Sleep: 10 W or less
Noise Printing: 50 dB A or less
Standing by: 38 dB A or less

I - 3
Temperature Operating: 10 to 32.5°C (59 to 90.5°F)
Storage: 0 to 40°C (38 to 104°F)
Humidity Operating: 20 to 80% (without condensation)
Storage: 20 to 80% (without condensation)
Dimensions (W x H x D) 357(W) 351(D) 192(H) mm
(when the output tray is closed and the Multi-purpose sheet

I - 4
2.4 Paper Specification
(1) Multi-purpose tray loading
Paper size: A4, Letter, Legal, B5, A5, and Executive, and other sizes of paper that can be
handled by the feed mechanism, can be loaded.
Feedable paper type : 60 (16 lb.) to 135 (36 lb.)g/m2
Maximum load height : 22 mm (200 sheets of 75 g/m2paper) letter size
Envelopes : 10 envelopes
Setting method : Pull the manual paper tray toward you, insert the sheaf
of paper into the tray, alining the top edge of the sheets,
then push the tray back to its original position.
(2) Manual paper loading
Themanualpaperloadingtakespriorityoffeedingandasinglesheetofpapercanbefedinto
the printer.
The applicable sizes and types of paper are the same as the multi-purpose tray loading
above in specification.
2.5 Print delivery
(1) At the print delivery tray opened
Tray capacity : Maximum 100 sheets (75g/m2), face-down only
(2) At the print delivery tray closed
Tray capacity : 1 sheet (75 g/m2), face-down only
Note) Face down : Deliver the printed face of the paper downward.
Environment : 23 ° C
2.6 Paper
(1) Types of paper
(a) Normal paper (60 to 135 g/m2, specified types of high-quality paper)
• A4 size
• Letter size
• Legal size
• B5 size
• A5 size
• Executive size
* The specified types of plain paper are as follows:
Letter : Xerox 4024 (75 g/m2)
A4 : Mitsubishi PPC paper (64 g/m2), Multi Copy (80 g/m2)
Feeding direction
148 to 356 mm (face down)
90 to 216 mm

I - 5
(b) Special paper (specified types)
• Labels
• Envelopes (DL, C5, COM10)
• Postcards
• Organizers (K, L, and M sizes of DAY-TIMERS)
(2) Paper feed conditions
2.7 Effective printing area
Printable area
Theeffectiveprintingareameanstheareawithinwhichtheprintingofallthedatareceivedwithout
any omissions can be guaranteed.
A
DB
F
F
E
E
C
Type Name Tray feed Manual feed
Normal paper (cut sheet)
Special paper (cut sheet)
60 to 135 g/m
2
paper
Labels
Envelopes
Postcards
Organizers

I - 6
The table below shows the effective printing areas.
(NotethatthepapersizesindicatedhereshouldconformtothenominaldimensionsspecifiedbyJIS.)
A4 paper must accommodate 80 characters printed in pica pitch (203.2 mm).
SIZE A B C D F
A 4
Letter
Legal
Executive
Organizer
(K size)
Organizer
(L size)
B 5
A 5
COM-10
MONARCH
C 5
DL
210.0mm
(2,480 dots) 297.0mm (3,507 dots) 203.2.0mm (2,400 dots)
288.5mm
11.36"
(3,408 dots)
4.23mm
(50 dots)
215.9mm
8.5"
(2,550 dots)
279.4mm
11.0"
(3,300 dots)
207.5mm
8.0"
(2,400 dots)
288.5mm
10.67"
(3,200 dots)
215.9mm
8.5"
(2,550 dots)
355.6mm
14.0"
(4,200 dots)
207.5mm
8.0"
(2,400 dots)
288.5mm
10.67"
(3,200 dots)
182.0 mm 257.0 mm 173.5 mm 248.5 mm
184.15mm
7.25"
(2,175 dots)
266.7mm
10.5"
(3,150 dots)
175.7mm
6.92"
(2,400 dots)
258.2mm
10.17"
(3,200 dots)
148.5mm
(1,754 dots) 105.0mm (1,240 dots) (1,654 dots) (1,140 dots)
95.25mm
3.75"
(1,125 dots)
171.45mm
6.75"
(2,025 dots)
86.78mm
3.42"
(1,025 dots)
162.98mm
6.42"
(1,925 dots)
139.7mm
5.5"
(1,650 dots)
215.9mm
8.5"
(2,550 dots)
131.23mm
5.17"
(1,550 dots)
207.43mm
8.17"
(2,450 dots)
104.78mm
4.125"
(1,237 dots)
241.3mm
9.5"
(2,850 dots)
98.43mm
3.875"
(1,162 dots)
190.5mm
7.5"
(2,250 dots)
162mm
(1,913 dots) 229mm (2,704 dots)
110mm
(1,299 dots) 220mm (2,598 dots)
E
3.4mm
(40 dots)
6.35mm
(75 dots)
6.01mm
(71 dots)
6.35mm
(75 dots)
6.01mm
(71 dots)

I - 7
feeder is removed.)
Weight Approx. 7kg (15.4 lb.)
3 SAFETY INFORMATION
3.1 Laser Safety (110 - 120V Model only)
Thisprinteriscertifiedas aClass1 laserproductunder theUSDepartment ofHealthand Human
Services(DHHS)RadiationPerformanceStandardaccordingtotheRadiationControlfor Health
and Safety Act of 1968. This means that the printer dose not produce hazardous laser radiation.
Sinceradiationemittedinsidetheprinteriscompletelyconfinedwithintheprotectivehousingsand
externalcovers,thelaserbeamcannotescapefromthemachineduringanyphaseofuseroperation.
3.2 CDRH Regulations (110 -120 V Model only)
The Center for Device and Radiological Health (CDRH) of the US Food and Drug Administration
implemented regulations for laser products on August 2, 1976. These regulations apply to laser
products manufactured from August 1, 1976. Compliance is mandatory for products marketed in
the United States. The label shown below indicates compliance with the CDRH regulations and
must be attached to laser products marketed in the United States.
MANUFACTURED : K
BROTHER INDUSTRIES, LTD.
15-1, Naeshiro-cho, Mizuho-ku Nagoya 467, Japan.
This product conforms with CDRH radiation
performance standard 21 CFR chapter 1
subchapter J. Fig. 1.1

I - 8
3.3 Caution for Laser Product
(1) CAUTION: Whenthemachineduring serving is operated withopencover,the regulations
of VBG 93 and the performance instructions for VBG 93 are valid.
(2) CAUTION: Incaseofanytroublewiththelaserunit,please replace the laser unit itself. To
prevent direct exposure to the laser beam, do not try to open the enclosure of
laser unit.
(3) Location of the Exit Opening of Laser Beam.
Fig. 1.3
CLASS 1 LASER PRODUCT
APPAREIL A LASER DE CLASSE 1
LASER KLASSE 1 NACH IEC825
UH0741
`
(4) Location of Caution Label for Laser Product.
Fig. 1.2
Scanner unit

II - 1
CHAPTER II THEORY OF OPERATION
1. ELECTRONICS
1.1 General Block Diagram
Fig. 2.1 shows a general block diagram of this printer.
Optional RAM board
(1.0, 1.5 MB)
Optional I/F board
(Mac. RS-232C)
Control system
Expansion memory I/O Expansion I/O
Video control block Interface block
External device
Engine control block
High-voltage power supply block
Image generation system
Drive block
(Stepping motor)
Laser scanner unit Paper tray unit
Manual feed
Paper tray
Fixing unit
Paper feed system
Drum unit Transfer block
Developing
block Cleaner
block
Charging
block
Drum
Toner cartridge
Fig. 2.1 General Block Diagram
External device
Eraser lamp Paper eject block
Operation block
(Operation panel)
Low-voltage power supply block

II - 2
1.2 Main PCB Block Diagram
Fig. 2.2 shows a block diagram of the main PCB.
RESET CIRCUIT
PROGRAM + FONT ROM
512 KByte
RAM
(0.5M or 1M Byte)
OPTION RAM
(0.5M or 1M Byte)
OPTION SERIAL I/O
(RS232C & RS422A)
EEPROM (128 8 bit)
CPU
(MC68EC000)
A S I C
OSCILLATOR (15.3MHz)
ADDRESS DECODER
DRAM CONTROL
TIMER
FIFO
CDCC PARALLEL I/O
SOFT SUPPORT
EEPROM I/O
ENGINE CONTROL I/O
TO DRIVER PCB
BUS INT
Fig. 2.2 Main PCB Block Diagram

II - 3
A2
A3
A4
A5
A6
A7
A8
A9
A1
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
31
32
56
55
54
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
34
33 A2
A3
A4
A5
A6
A7
A8
A9
A1
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
D2
D3
D4
D5
D6
D7
D8
D9
D1
D10
D11
D12
D13
D14
D15
D0
58
59
60
61
62
63
64
65
66
67
68
2
3
4
5D2
D3
D4
D5
D6
D7
D8
D9
D1
D10
D11
D12
D13
D14
D15
D0
<08> ( -11D)
( -11B)
<02> (02-08B)
( -11D)
<07> ( -11D) (02-09B)
( -11B)
<01> ( -04C) ( -08B)
+5V
#2 MC68EC000FN16
NC 22
RESET 21
20
16
11
NC
RESET
HALT
CLK
DTACK
BR
BERR
AVEC
IPL0
IPL1
IPL2
IPL0
IPL1
IPL2
27
26
25
AVEC
+5V
SCLK
DTACK
BR 13
24
23
VCC
VCC
VCC
CND
CND
CND
CND
CND
BC
14
15
53 14
14
1
17
18
35
57 0V
12
30
29
28
19
7
10
8
9
FC0
FC1
FC2
MODE
A0
NC
AS
R/W
UDS
LDS
AS
R/W
UDS
LDS
FC0
FC1
FC2
BC
+5V
( -04C)
( -05F)
( -05F)
( -05F)
( -04C)
( -04C)
( -04C)
( -04C)
6
( -05F)
( -05E)
( 05)
( -05F)
( -05F)
( -05F)
( -05F)
( -05F)
1.3 Main PCB
1.3.1 CPU
TheCPU isaMotorola MC68EC000FN16whichisdrivenwith aclockfrequencyof15.3
MHz. This clock frequency is made by dividing the source clock of 30.67 MHz into two.
The address bus is 23 bits of A1 to A23, and the data bus is 16 bits. The total memory
space is 16 MBytes.
Fig. 2.3

II - 4
1.3.2 ASIC
(1) Oscillator circuit
Generates the main clock for the CPU by deviding the source clock frequency
into two.
(2) Address decoder
Generates the CS for each device.
(3) DRAM control
GeneratestheRAS,CAS, WR, OEandMAsignals for theDRAMandcontrols
refresh processing (CAS before RAS self-refreshing method).
(4) Interrupt control
Interrupt levels:
Priority High 7 NMI
6 FIFO
5 Timer1
4BD
3 EXINT (Option Serial I/O)
2 CDCC
Low 1 Timer2
(5) Timers
The following timers are incorporated:
Timer 1 16-bit timer
Timer 2 10-bit timer
Timer 3 Watch-dog timer 1
Timer 4 Watch-dog timer 2
(6) FIFO
A2,560-bitFIFOisincorporated. DataforonerasteristransferedfromtheRAM
totheFIFO by DMAtransmission andis out putasserialvideo data. Thedata
cycle is 1.53 MHz.
(7) CDCC parallel I/O
CDCCdataisreceivedin4-byteunitsbyDMAtransmission. Ifdataoflessthan
4bytesremains,atime-outoccursanditisforciblytransferredbyDMStransfer.
t < 33 µ sec
0.6µ sec
t > 33 µ sec
3µsec
High Speed Mode
Low Speed Mode
STROBE
BUSY
ACK
STROBE
BUSY
ACK
Fig. 2.4

II - 5
The default setting is "AUTO MODE", which means that the time between
the falling edge of the BUSY signal and the rising edge of the STROBE signal
is measured, and if it is longer than about 33 µsec, the mode is automatically
switched to the LOW SPEED MODE; if it is shorter, the mode is automatically
switched to the HIGH SPEED MODE.
It is also possible to fix the mode to the LOW SPEED MODE by sending a
command from the PC to rewrite the contents of the NV-RAM.
BUSY goes HIGH at the falling edge of STROBE.
The data (8-bit) from the PC is latched in the ASIC at the rising edge of
STROBE.
The pulse width of ACK differs according to the MODE, as shown above.
(8) Software support
Supports16x16rotation,bitexpansion,andfloatingdecimalpointcalculations.
(9) EEPROM I/O
One output port and one I/O port are assigned.

II - 6
Fig. 2.5
(10) Engine control I/O
This I/O is for connection to the driver PCB. It controls the motors,
solenoids, sensors, etc.
<04> ( -05E) (02-04E)
<03> ( -11D) (02-09B)
( -11B)
<08> ( -11D) (02-09B)
( -11B)
<02> (02-08B)
( -11D)
A2
A3
A4
A5
A6
A7
A8
A9
A1
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
100
99
98
97
96
95
94
93
101
92
91
90
89
88
87
86
85
84
83
82
76
75
74
A2
A3
A4
A5
A6
A7
A8
A9
A1
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
56
55
NC
NC NC
NC
MA0
RWU
RWL
ROE
MA1
MA2
MA3
MA4
MA5
MA6
MA7
MA8
MA9
148
146
144
142
141
143
145
147
149
150
MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
MA8
MA9
154
155
151
RWU
RWL
ROE
<08>
<07>
<06>
XCAS0
XCAS1
ICAS0
ICAS1
RAS
139
138
153
140
152
XCAS0
XCAS1
ICAS0
ICAS1
RAS
(02-09B)
(02-09B)
<02>
<03>
VCC
VCC
VCC
VCC
VCC
LED0
LED1
LED2
LED3
LED4
DCI1
DCI2
DCI3
DCI4
DCI5
DCI6
DCI7
DCI8
17
16
15
14
13
12
11
10
SD1
SD2
SD3
SD4
SD5
SD6
SD7
SD8
XOUT
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
D00
D01
D02
D03
D04
D05
D06
D07
D08
D09
D10
D11
D12
D13
D14
D15
117
116
115
114
113
112
111
110
109
108
107
106
105
104
103
102
C35
C32 309
309
0V
CSA30.67MXZ
XL1 (R25)
(1M)
157 XIN
(02-07D) DCI(8..1)
(02-07C) SELIN
HBUSY
PRMINT
STB
SW1
SW2
HAISI
LOCK
TONER
SENSE
XVDO
(02-07C)
(02-07C)
(02-07C)
C40
101
( -01F)
( -01F)
( -01F)
IPL0
( -02F)
( -02F)
( -02F)
FC0
FC1
FC2
IPL1
IPL2
AVEC ( -01E)
FC0
FC1
FC2
IPL0
IPL1
IPL2
AVEC
SCLK
BR
BGACK
DTACK
RD
ROM1
ROM0 ROM0
SCL
RD
DTACK
BR
SCLK ( -01E)
( -01E)
( -11F)
( -01E)
72
73
21
125
127
128
129
131
134
133
132
137
136
135
R19 100
( -11F)
( -01B)
71
67
66
55
54
52
53
51
37
35
50
49
48
47
68
45
43
46
30
29
28
27
26
23
22
6
8
9
7
3
RESERVE
THM1
THM0
HVA
HVB
D0DC
HVT
HEATON
DRIVE
SCANCLK
PMBB
PMB
PMAB
PMA
RIO
CRCH
ERS
PCKUP
RES
BC
RW
UDS
AS
130
126
123
119
118
AS
LDS
RW
BC 124
UDS LDS
( -02F)
( -02E)
( -02F)
( -02F)
( -02F)
78
77
70
69
63
62
61
60
59
58
0V
( -03B)
(02-04C) RESIST TESASI
SENTAN+5VI
TEST1
TEST2
( -07A)
( -08F)
( -08F)
HCMP1
MCMP2N
MCMP1N
HCMP1
HCMPN
MCMP2N
MCMP2I
MCMP1N
MCMP1I FLT
PE
ACK
SLCT
BUSY
WR
OPTION
FLT
PE
ACK
SLCT
BUSY
WR
OPTION
(02-07C)
(02-07B)
(02-07B)
(02-07B)
(02-07B)
(02-04E)
(02-04E)
(02-04C)
(02-04C)
( -08B) TONER
XVDO
MP
20
44
39
38
36
34
31
( -08C)
( -08B) HAISI
BD
LOCK
COVER
( -08B)
( -08B) 25
24
19
SW1
SW2
EXINT
2
4
5
18
SELIN
HBUSY
PRMINT
STB
#5 UPD93094GM-3ED 1
40
57
81
120
+5V
C33
104
41
42
64
79
80
121
122
156
159
160 0V
CND
CND
CND
CND
CND
CND
CND
CND
CND
CND
VDO
VON
32
33
TEST
R21 5.1K
R29 10K
0V
1K
1K
1K
100K
R23
R27
R26
R24
<01> +5VI
0V
+5V
0V
( -05D) HEATON
(02-04F)
+5V
EXINT
158 HEATON ( -02C)
( -02B)SDA
( -11B)

II - 7
1.3.3 ROM
A program of 512 Kbytes and the font data are stored in the ROM.
A42-pinICsocketisprovided:an8MbitROM(42-pin)canbemountedtothissocket
normally,buta4MbitROM(40-pin)mustbemounted toleavethe1stand42ndpins
of the socket opened.
1.3.4 RAM
A4-MbitDRAM(x16bits)isusedastheRAM. Dependingonthespecification,There
are two models: the 0.5 M model (one mounted), or the 1 M model (two mounted).
Fig. 2.6
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
10
9
8
7
6
5
4
3
41
40
39
38
37
36
35
34
33
2
1
22
16
18
20
23
25
27
29
15
17
19
21
24
26
28
30
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A0 D0
D15
/A-1
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D0
D15
NC 42 NC
( -05E)
+5V
<04> RD
ROM0 11
13
32
CE
OE
BYTE
#1
UPD27C8000CZ
VCC
CND
CND
31
12
14
C26
104
+5V
0V
MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
MA8
MA9
16
17
18
19
22
23
24
25
26
15
A1
A2
A3
A4
A5
A6
A7
A8
A9
A0
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
DQ9
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
DQ16
2
3
4
5
7
8
9
10
D1
D2
D3
D4
D5
D6
D8
D9
D10
D11
D12
D13
D14
D0
D7
D15
31
32
33
34
36
37
38
39
NC
NC
NC
NC 11
NC 29
NC 30
27
13
12
28
14
OE
UW
CAS
LW
RAS
RWU
RWL
ICAS1
RAS
( -05H)ROE
1
6
28
21
35
40
+5V
( -05H)
( -05H)
( -05C)
( -05C)
VCC
VCC
VCC
VSS
VSS
VSS
#4
M5M44170AJ-8 C29
104
0V
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
DQ9
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
DQ16
MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
MA8
MA9
16
17
18
19
22
23
24
25
26
15
A1
A2
A3
A4
A5
A6
A7
A8
A9
A0
2
3
4
5
7
8
9
10
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
32
33
34
36
37
38
39
31
( -05H)ROE
+5V
VCC
#3
M5M44170AJ-8
0V
21
35
40
VCC
VCC
VSS
VSS
VSS
1
6
20
27
13
12
28
14
11
UW
CAS
LW
RAS
RHU
RHL
ICAS1
RAS
( -05H)
( -05H)
( -05C)
( -05C)
C29
104
OE
29
30
NC
NC
NC
NC
NC
NC
Fig. 2.7

II - 8
1.3.5 Optional RAMs
There are two types of optional RAM: the 1 Mbyte model and the 1.5 Mbyte model,
butevenifthe1.5Mbytemodelismountedinadditiontoa1Mmode,only2Mbytes
in total will be recognized.
0.5 M model + 1 M optional RAM = 1.5 Mbytes
0.5 M model + 1.5 M optional RAM = 2 Mbytes
1 M model + 1 M optional RAM = 2 Mbytes
1 M model + 1.5 M optional RAM = 2 Mbytes
P2 OPTION RAM
OE
UW
LW
ICAS1
XCAS0
XCAS1
RAS
5
6
7
29
27
28
30
(01-05H) ROE
(01-05H) RWU
(01-05H) RWL
(01-05F) XCAS0
(01-05F) XCAS1
(01-05C) RAS
MA0
MA1
MA2
MA3
MA4
MA5
MA6
MA7
MA8
MA9
40
39
38
37
36
35
34
33
32
31
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
8
9
10
11
12
13
14
15
D1
D2
D3
D4
D5
D6
D7
D0
D9
D10
D11
D12
D13
D14
D15
D8 25
24
20
19
18
17
16
26 DQ9
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
DQ16
VCC
VSS
23
4
3
21
22
2
1
VCC
VCC
VSS
VSS
VSS
C25
104
+5V
0V
(01-07H) D(15..0)
(01-09C) MA(9..0)
(01-05C) ICAS1 R18 0
P3 OPTION I/F
RESET
OPCS
RD
WR
A5
RESET (01-01E)
OPTION (01-05C)
RD
WR (01-11F)
(01-05B)
A4
A3
A2
A1
D7
D6
D5
D4
D3
D2
D1
D0
OPIRQ
SENTAN
BD
EXVDO
LEDR
SENSE
+5V
+5V
+5V
0V
0V
0V
0V
17
2
13
1
30
29
15
14
28
24
9
8
23
7
21
6
5
16
27
22
12
20
10
11
25
26
18
4
19
3
0V
C34
104
+5V
EXINT (01-03A)
RESIST (01)
RBD (01-02A)
EXVDO
LEDR
SENSE
(01-04B)
(01-06C)
(01-04B)
D(7..0) (01-07C)
A(5..1) (01-08C)
1.3.6 Optional Serial I/O
The interrupt of serial I/O are input to the EXINT terminal of the ASIC, and are
recognized by the CPU. A 32-byte space for register is provided for this I/O,
which are read and written to by the CPU.
Fig. 2.8
Fig. 2.9