DOWNLOAD Panasonic KX-FL423RU Service Manual ↓ Size: 10.1 MB | Pages: 127 in PDF or view online for FREE

Model
KX-FL423RU
Pages
127
Size
10.1 MB
Type
PDF
Document
Service Manual
Brand
Device
Fax / COMPACT LASER FAX
File
kx-fl423ru.pdf
Date
PREV: Panasonic KX-FL403UA (serv.man11) Service Manual / Supplement

Panasonic KX-FL423RU Service Manual ▷ View online

13
KX-FL423RU-B / KX-FL423RU-W 
4.2.2.2.
REPORTS
14
KX-FL423RU-B / KX-FL423RU-W 
5 Features
General
• Help function
Display:
1. FEATURE LIST
2. PHONEBOOK
3. FAX RECEIVING
4. CALLER ID
Plain Paper Facsimile Machine
• Automatic document feeder (15 sheets)
• Quick scan
• Resolution: Standard/Fine/Super fine/Photo/Photo with text.
(64 level)
- STANDARD: For printed or typewritten documents with
normal-sized characters.
- FINE: For documents with small printing.
- SUPER FINE: For documents with very small printing.
This setting is effective only when the other party has a
compatible fax machines.
- PHOTO: For documents containing photographs,
shaded drawing, etc.
- MIXED (PHOTO WITH TEXT): For documents contain-
ing photograph and text.
• Broad cast 
• 200-sheet paper capacity (60 g/m2~ 75 g/m2[16 lb~20 lb.])
Integrated Telephone System
• On-hook dialing
• Monitor speaker
• Voice muting
• Redialing function
• 100-Station telephone directory
• Caller identification service (Caller ID) 
This unit is Caller ID compatible. In order to display the
caller’s telephone number, you must subscribe to the appro-
priate service of your local telephone company.
Important:
- This unit is designed in accordance with the ETS (Euro-
pean Telecommunication Standard) and only supports
the basic CLIP (Calling Line Identification Presentation)
features.
- This unit will only display the caller’s telephone number
and name. 
- This unit will not support future additional telephone ser-
vices.
- Depending on the service of the local telephone com-
pany, the date/time of the call or the caller’s name may
not be displayed.
Enhanced Copier Function
• Multi-copy function (up to 99 copies)
• Enlargement and reduction
• Collate
• 64-Level halftone
15
KX-FL423RU-B / KX-FL423RU-W 
6 Technical Descriptions
6.1.
Connection Diagram
1 2 3 4 5
7 6 5 4 3 2 1
1
2
1
2
3
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
CN104
CN105
CN113
CN102
CN103
CN107
CN110
1 2 3 4 5
CN106
CN402
CN401
CN300
1
2
3
CN114
MAIN
BOARD
HVPS
SMPS
OPERATION  PANEL
BOARD
LCD
LSU
PICKUP
SOLENOID
TO
TELEPHONE
LINE
TO
EXTERNAL
TELEPHONE
1 2 3 4 5 6 7 8
CN601
9 8 7 6 5 4 3 2 1
10
CN651
24V
24V
GND
GND
GND
5V
CN101
24V
-
GND
CHG
DEV
TRS
TOPCVR
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
CN1
LIVE
NEUTRAL
COVER  OPEN SW
SW1
TRA
OPC
DEV
CHG
GND
FANDET
FANON
GND
PICK
POLCLK
XREAD
Y
POLON
GND
24V
XHSYNC
GND
5V
XAPC
XLDEN
XVIDEO
GND
DC  FAN
TRANSFER
ROLLER
OPC
DRUM
DRUM  UNIT
1 2 3 4 5 6 7 8
THRM2
KST
AR
T
KTXD
KSCLK
OPERST
DG
5V
RPS
DB7
DB6
DB5
DB4
E
R / 
W
RS
V0
VDD
VSS
DEVELOPING
ROLLER
TONER  SUPPLY
ROLLER
1 2 3
TONER  
SENSOR
CN511
IC512
REGIST
SENSOR
PS531
HEAT  LAMP
THERMOSTAT
THERMOSTAT
THERMISTOR
1 2 3 4
CN111
1 2 3 4
PS501
EXIT SENSOR
CN502
1
2
3
CN501
THRM
THR
FUSER
UNIT
VARISTOR  
BOARD
GND
PICK
SPRX
SPMUTE
HSTX
HSRX
AG
RLY
CN405
HOOK  SW
1
2
CN406
Speaker
HSMIC+
4
HSSP-
3
2
No
HSSP+
HSMIC-
1
NAME
NAME
No
CN403
HANDSET
SP+
SP-
SCAN
MOTOR
COM
XB
XA
B
READ
POSITION
Sensor
DOCUMENT
SW
SW641
PS601
CIS MODULE
CIS MODULE
GND
3.3V
SI
GLED
VLED
SIG
CLK
1
3
2
4
1
3
5
2
4
6
THRM1
GND
LED
POUT
3.3V
TNREMP
GND
1
2
3
4
CN101
MAIN
MOTOR
A
B
XB
XA
A
CN531
1 2 3 4
CN112
1 2 3 4
REGIST
GND
+3BA
T
3.3V
PWRDWN
HTRCTL
1
2
3
4
5
6
7
8
1 2 3 4
CN403
CN1
AC POWER
HVERR
GRID
BATTERY
9
8
7
6
5
4
3
2
1
16
15
14
13
12
11
10
P-SHORT/RLY2
BELL/CPC
GND
+5V
LINERX
LINETX
MONRX
DCN
9
8
7
6
5
4
3
2
1
16
15
14
13
12
11
10
HOOK
GND
CN671-1
CN671-2
ANALOG  BOARD
CN407
16
KX-FL423RU-B / KX-FL423RU-W 
6.2.
General Block Diagram
The following is an outline of each device IC on the digital board.
1. SOC (IC101)
This custom IC is used for general FAX operations.
2. ROM (IC102)
This 4MB FLASH ROM contains all of the program instructions on the unit operations.
3. Synchronous Dynamic RAM (IC103)
This SDRAM is used for CPU work and receiving memory and page memory.
4. Read Section
CIS image sensor to read transmitted documents.
5. LSU (Laser Scanning Unit)
Forms the images on the OPC drum by rotating polygon motor and reflecting the laser beam against polygon.
6. Analog Board
Composed of ITS circuit and NCU circuit.
7. Sensor Section
Composed of 3 switches and 4 sensors.
8. Power Supply Board Switching Section
Supplies +5V and +24V to the unit and controls the heat lamp.
9. High Voltage Power Supply Board Section
Supplies bias need for the printing operation: bias of the DRUM, Developing and Transcription.
10. Fixing Unit
Composed heat lamp, thermistor and thermal fuse.
(1) CPU:
This model uses a Z80 equivalent CPU operating at 16MHz.
Many of the peripheral functions are handled by custom designed LSIs.
As a result, the CPU only needs to process the results.
(2) RTC:
Real time clock.
(3) DECODER:
Decords the address.
(4) ROM/RAM I/F:
Controls the SELECT signal of ROM or RAM and bank switching.
(5) LSU I/F:
Controls the polygon motor and outputs the VIDEO signal to LSU.
(6) I/O PORT:
I/O Port Interface.
(7) ANALOG UNIT:
Sends beep tones, etc.
Convert the analog signal to the digital signal.
(8) MOTOR I/F:
Controls the SCAN Motor.
(9) OPERATION PANEL I/F: Serial interface with Operation Panel.
(10) ANALOG GATE ARRAY
I/F: Controls the ANA-
LOG GATE ARRAY.
Controls the ANALOG GATE ARRAY.
(11) MOTOR I/F:
Controls the ENGINE Motor.
(12) FAN I/F:
Controls FAN MOTOR and detect the rotation of FAN MOTOR.
(13) SENSOR I/F:
Controls the LED and detect the sensor signal.
(14) MODEM:
Performs the modulation and the demodulation for FAX communication.
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