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UX-B20
Sharp UX-B20 Service Manual
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UX-B20U/UX-B20C/B25C
6 – 17
2. Power Supply PWB p
art
s layout (T
op side)
3. Power Supply PWB p
arts
layout (Bottom side)
D104
C103
R104
R103
BEA101
P101
C101
VR101
R107
C111
C104
IC101
CNPW
PC1
1
D5
C6
C7
Z1
D3
D4
D7
D6
T1
BEA1
D12
D11
F1
AC250V
2.5A
C1
J1
CNAC
L1
C5
R19
NTC1
D13
D10
D8
C8
Q1
D101
C102
D106
1
The
POWER
PWB
of
the
model
employs
lead-free
solder.
R41
R1
R109
R9
R12
R10
R110
R111
C110
R101
R112
R113
R115
R108
R102
R105
R106
D102
R11
R13
R8
C9
C11
R6
C10
R5
R2
R3
R4
Q2
R17
R7
The
POWER
PWB
of
the
model
employs
lead-free
solder.
82
84
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
104 pages
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Sharp UX-B20 Specifications
General
Brand
Sharp
Model
UX-B20
Category
Fax Machine
Language
English
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