Sharp FO 4400 - B/W Laser - All-in-One Service Manual Page 87
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- Table of contents
- TROUBLESHOOTING
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FO-4400U
FO-CS1
4 – 1
CHAPTER 4. DIAGRAMS
[1] Block diagram
Lithium Battery
+5V/+24V
Power supply Unit
SH7706(SH-3) SCIF RS-232C
Driver
external 33MHz
Only for Firmware Download from PC
Program Memory
16
(No Production)
Operation Panel Unit
&
LCD Module
Entry Data Memory
:
20 x 2Line
NOR Flash 4MB
16
New ASIC-1 Panel PWB
Working Memory
("COSMOS")
:
Tact SW
SDRAM
16
• MMR CODEC<1ch>
8MB • JBIG CODEC <2ch>
• SDRAM Controller
Backup Memory
8 • Image Processor
16
Page Memory
Scanner
SRAM 32KB
: up to 400dpi/B4
SDRAM 8MB 8.3"/30ppm
Option (FO-8MK)
based on LC821033
A4 CIS
Memory PWB Image Memory
8 • Run length Converter
:
203dpi(8pixel/mm)
Image Memory
NAND Flash 8MB
• Panel Controller
NAND Flash
8 • Motor Controller Scan Mechanism
8MB
• CPU I/F, Mapper (Stepping Motor)
• GPIO port
serial
RTC(Backup)
• Print Data Processor SM8578BV
LIU PWB MODEM(Line1) 8 • ECC Code Generator
HSYNC,TOD etc
Printer PWB
MINOLTA NC-L601/16ppm
Line-1 FM336Plus
(PCU Output)
(MINOLTA CPU
: 406 x 391dpi
on
New ASIC-2
("SPIDER")
16
• RTC I/F
SCI & PCU-input
• SCI ch0(for PCU)
• SCI ch1(for PCL)
• Video I/F Switch
• GPIO
• DPO Bus Switch
(Arbitrator)
•
Buzzer Clock Generator
Main CPU
133MHz
SANYO IP CORE
USER LOGIC
PC
Control PWB
board)
- SERVICE MANUAL 1
- FACSIMILE 1
- CONTENTS 2
- [1] Specifications 4
- [2] Life of consumable 4
- [3] Operation panel 5
- [4] Transmittable documents 6
- [5] Installation 7
- Attach a letter or 9
- SPEED DIAL 14
- CHAPTER 2. ADJUSTMENTS 15
- MEMORY CLEAR ? 16
- S W 0 1 = 0 0 0 0 0 0 0 0 17
- Soft switch mode screen 17
- PANEL CHECK MODE 18
- ALL KEY OK !! 18
- : Speed dial number 19
- HHHHHHHHHHHHHHHHHHHH 20
- • Blank paper aging mode 21
- 4. Soft switch description 24
- • Soft switch 24
- [3] Troubleshooting 49
- [4] Error code table 50
- 2. Service call error massage 51
- Super G3 mode 51
- [1] Mechanical description 53
- [2] Printer description 54
- 8. LASER EXPOSURE 57
- 9. DEVELOPMENT 57
- 9-1. Overview 57
- Temperature (°C) 58
- 12. PRINT SEQUENCE 59
- 13. Timing chart 60
- 13-1. Print Starting 60
- 13-2. Print Ending 60
- 2 Rear cabinet 62
- PWB plate, Right cabinet 63
- 4 PWB unit 64
- Inner left cabinet unit 67
- 9 Power supply PWB 68
- Scanner frame unit (1/2) 69
- Scanner frame unit (2/2) 70
- Document guide upper unit 71
- Operation panel unit 71
- 13 Upper cover 72
- Wire treatment 73
- High voltage PWB unit (HV1) 74
- Main motor (M1) 75
- Fusing unit (1/2) 77
- Heater Lamp 78
- Voltage Mark 78
- Paper cassette (FO-CS1) 79
- Cassette case unit 80
- Drive system unit (FO-CS1) 81
- Cassette cabinet (FO-CS1) 82
- Cassette case (1/2) (FO-CS1) 83
- Cassette case (2/2) (FO-CS1) 84
- (FO-45VS) 85
- CHAPTER 4. DIAGRAMS 87
- [1] Circuit description 91
- FO-4400U 100
- (3) Modem block 101
- (2) Backup memory block 101
- 0 I1 Output Current 104
- E) = IOUT 104
- E) = IOUT x 2/3 104
- E) = IOUT x 1/3 104
- 2. Waveforms 105
- CPU block 110
- MAIN CPU 111
- HD6417706F133 111
- Main ASIC block 112
- IC5 SDRAM 113
- MT48LC4M16A2TG-75/ 113
- W986416DH-7 113
- Sub ASIC block 114
- R284 10K 115
- Memory block 4/12 116
- Modem block 5/12 117
- LCD controller block 7/12 119
- Connector block 1 9/12 121
- Connector block 2 10/12 122
- Connector block 3 11/12 123
- Connector block 4 12/12 124
- [2] LIU PWB circuit 1/1 127
- M38079EFFS_12MHZ 130
- Printer PWB circuit 2/2 131
- HEATER ON 134
- HEATER-RELAY OFF 134
- INTERLOCK 134
- Power Supply PWB parts layout 135
- Joint PWB 138
- No. DESCRIPTION PARTS CODE 139
- C LED PWB unit DCEKP425CXHI1 139
- [1] G3 Protocol 144
- [2] Super G3 Protocol 145
- [3] Power On Sequence 146
- CHAPTER 8. OTHERS 147
- Fig. 5 Connected cable 149
- FO-4400 PC 150
- PARTS GUIDE 151
- [5] Document guide upper unit 156
- [4] Operation panel unit 156
- [10] Drive/Transfer unit 162
- PARTS CODE 163
- DESCRIPTION 163
- I n d e x 183
- © 2002 BY SHARP CORPORATION 190
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