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Panasonic
KX-FT21RS
manual
Models:
KX-FT21RS
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Troubleshooting
Specs
Install
Ccitt No Test Chart
User Recoverable Errors
Transmit problem
Reset Circuit
Disassembly Instructions
Battery Caution
Adjustments
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KX-FT21RS
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Contents
KX-FT21RS
Contents
Insulation Resistance Test
Safety Precautions
For Service Technicians
Battery Caution
AC Caution
Moving Sections of the Unit
Personal Safety Precautions
Live Electrical Sections
Integrated telephone system
Features
General
Facsimile
Optional Accessories
Specifications
Ccitt No Test Chart
Overview
Location of Controls
Control Panel
Connections
Installing the Recording Paper
Installation
Document Stacker
Press START/COPY/SET
Setting Your Logo
# , then
Example Bill
Documents you can send
To select characters with the dial keypad
Maintenance Check ITEMS/COMPONENT Locations
Maintenance Items and Component Locations
Outline
Maintenance List Maintenance Cycle
Line cord
Maintenance Cleaning the Document Feeder Unit
Disconnect the power cord and the telephone
Clean the document feeder rollers, sub roller
Cleaning the Pick UP Roller
Cleaning the Thermal Head
Refer to 4 Disassembly Instruction
Troubleshooting
Troubleshooting Summary
Precautions
User Recoverable Errors
Document Jam
Starting Troubleshooting
Troubleshooting Details
Simple Check List
Troubleshooting Items Table
No document feed
ADF Auto Document Feed Section
Paper JAM
Multiple feed
Skew
Image is distorted When printing
Black or white vertical lines appear Skewed receiving image
KX-FT21RS
KX-FT21RS
Facsimile section
Communication Section
Defective facsimile section
Transmit problem
Sometimes there is a transmit problem
Check Document Paper JAM
Reception problem
Unit can copy, but cannot transmit/receive
Echo/Echo Canceler
Erroneous detection due to an echo or echo canceler
Cause and Countermeasure
Countermeasure B
Causes and Countermeasures Cause a
Countermeasure a
Cause B
Reception Operation
Transmission Operation
How to output the Journal Report
TX=TRANSMISSION RX=RECEPTION
Countermeasure
KX-FT21RS
KX-FT21RS
KX-FT21RS
KX-FT21RS
KX-FT21RS
KX-FT21RS
KX-FT21RS
Hint
Remote programming
KX-FT21RS
YES/NO
Program Mode Table
996 Journal
Digital Board Section
Please refer to the 2.3.4.3.1. Digital Block Diagram
Digital Block Diagram
KX-FT21RS
Normal Wave Patterns
Pin No. Diagram
KX-FT21RS
KX-FT21RS
NG Example
Check the Status of the Digital Board
Analog Board Section
Defective ITS Integrated Telephone System Section
Key components for troubleshooting
Power Supply Board Section
Troubleshooting Flow Chart
KX-FT21RS
Broken parts repair details D101, D102, D103, D104
No key operation No LCD indication
Operation Board Section
Check the document sensor PS1
Sensor Section
Check the read position PS2
Refer to 6.4.4. Scanning Block
Read Section
KX-FT21RS
Refer to 6.4.3. Thermal Head
Thermal Head Section
Operation
Programming and Lists
Operation Flow
Above values are the default values
3ALL
Service Function Table
See 2.6.1. Printout Example
Service Mode Settings Example of a printed out list
Other
Test Functions
Button Code Table
Dtmf Signal Tone Transmit Selection
Print Test Pattern
EQM
Descriptions
Compression Code MH/MR
Mslt means Minimum Scan Line Time. Used only at the factory
Printout Example
Adjusting the Feed Pressure
Adjustments
Disassembly Instructions
KX-FT21RS
KX-FT21RS
KX-FT21RS
KX-FT21RS
KX-FT21RS
KX-FT21RS
KX-FT21RS
KX-FT21RS
KX-FT21RS
KX-FT21RS
Preparation
Flat Package IC Removal Procedure
KX-FT21RS
Connection Diagram
Codec IC5 D/A converter
General Block Diagram
+24V +5V
AC220V
256k
Control Section
Block Diagram
100
Transmits the recorded data to the thermal head
Asic IC1
Decodes the address
Execute modulation and demodulation for the FAX
102
103
Vddc
104
ROM IC2
Reset Circuit
RAM IC3
Function
Sram and RTC Back UP Circuit
Circuit Operation
Supervision Circuit for the Thermal Head Temperature
LED Arraycis
Transmission
Facsimile Section
Image Data Flow During Facsimile Operation
Copy Fine, Super-Fine, Half Tone
Head 110
Block Diagram
Analog
Front/End
Thermal Head
112
Scanning Block
Stepping Motor Drive Circuit
Stepping Motor Phase Pattern
Gear Section
Mode Selection
Copy mode
Mode Operation
Transmit mode
Receive mode
Scanning Printing
See 6.5. Sensers and Switches
117
118
Copying
All of the sensor and switches are shown below
Sensors and Switches
119
Recording Paper Sensor SW201
Motor Position Sensor
120
Document Sensor PS1
Read Position Sensor PS2
121
Definition of Each Group
Modem Section
Function
On ITU-T International Telecommunications´ Union
Hold time
Concerning Transmission Time
Control time
Image transmission time
DIS/DTC DCS
124
125
CFR
126
This unit uses one-dimensional MH format 127
Redundancy Compression Process Coding Mode
Modem Circuit Operation
Analog Unit
Bell Detection Circuit
NCU Section
General
Line Relay RLY1
Line Amplifier and Side Tone Circuits
Handset Circuit
Monitor Circuit
EXT. TEL
Circuit
Diagram
Key Matrix
Analog Switch IC1 Control
Operation Panel
KEY Scan
LCD Control
Sensor Detection
Rectifier Circuit
Power Supply Board Section
This power supply board uses the switching regulator method
Input Circuit
KX-FT21RS
Over Voltage Circuit
Surge Absorber Circuit
Control Circuit and Detecting Circuit
Over Current Limiter O.C.L
For the Schematic Diagrams
141
Printed Circuit Board
142
TP8 TP7 C26
C225
D104 D103
SW201
C230 C231 C106
Q203
L203
IC101
R215
145
F101
146
Printed Circuit Board Operation Board
147
Schematic Diagram
148
Schematic Diagram Analog Circuit
149
Schematic Diagram Switching Power Supply
150
Schematic Diagram Operation Circuit
151
152
153
Operation Panel Section
154
Upper Cabinet Section
155
Lower CABINET/P.C.B. Section
Motor Section
157
Actual Size of Screws and Washer
158
Cabinet and Electrical Parts
This replacement parts list is for KX-FT21RS only
159
160
Digital Board Parts
161
162
Analog Board Parts
163
164
Operation Board Parts
165
Power Supply Board Parts
Fixtures and Tools
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