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UX-B20
Sharp UX-B20 Service Manual
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UX-B20U/UX-B20C/B25C
7 – 2
[2] Power on sequence
2
1
YES
YES
CPU
initialized
MODEM
initialized
STOP
key
?
"WAIT
A
MOMENT"
display
START
NO
YES
STAND-BY
3
sec
?
NO
"MEMORY
CLEAR
?"
display
NO
YES
STAND-BY
3s
e
c?
NO
NO
START
key
?
COPY
key
?
STOP
key
?
NO
Memory
clear
STAND-BY
2
1
"MEMORY
CLEARED"
display
Memory
clear
PROCESS
CHECK
MODE
"MEMORY
CLEARED"
display
YES
89
91
Table of Contents
Default Chapter
1
Table of Contents
1
Chapter 1. General Description
3
Specifications
3
Operation Panel
4
Transmittable Documents
5
Installation
6
Connecting the Power Cord
7
Loading Printing Paper
7
Installing the Print Cartridge
8
Setting the Paper Size
10
Connecting the Telephone Line Cord
10
Quick Setup Guide
12
Quick Reference Guide
13
Volume Adjustments
14
Chapter 2. Adjustments
14
Adjustments
14
Diagnostics and Service Soft Switch
15
Troubleshooting
36
Error Code Table
37
General Description
38
Hopper Mechanism
38
Chapter 3. Mechanism Blocks
38
Ink Jet Printer
40
Disassembly and Assembly Procedures
43
Block Diagram
47
CHAPTER 4. DIAGRAMS 1] Block Diagram
47
Wiring Diagram
48
Point-To-Point Diagram
49
Circuit Description
50
Chapter 5. Circuit Description
50
Circuit Description of Control PWB
51
Circuit Description of LIU PWB
64
Circuit Description of Power Supply PWB
66
Circuit Description of CIS Unit
66
Control PWB Circuit
67
LIU PWB Circuit
77
Power Supply PWB Circuit
82
Operation Panel PWB Circuit
84
Ink PWB Circuit
87
Chapter 7. Operation Flowchart
89
Protocol
89
Power on Sequence
90
Chapter 8. Other
91
Service Tools
91
Changing the Record Paper Size
94
Rewriting Version up the FLASH ROM
95
Parts Guide
105
Sharp Corporation
105
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Operation Manual
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Sharp UX-B20 Specifications
General
Brand
Sharp
Model
UX-B20
Category
Fax Machine
Language
English
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