Read Panasonic UF-490 / UF-4000 / UF-4100 / UF-490YC / UF-490YR Service Manual online
5
1 System Description
1.1.
Electrical Circuit Explanation
1.1.1.
Fax Block Diagram
IC12
IC11
P
aper
F
eed
Solenoid
A-point
Sensor
B-point
Sensor
Speak
er
TEL
LINE
Co
v
er Sensor
50MHz
CIS
IA2008-MA30C (A4)
or
IH2010-MB51B (B4)
Work Memory
Page Memory
SDRAM
8MB
Scanner
/ Pr
inter
Motor
F
ax Bloc
k Diag
ra
m
PNL PCB
Key
Matrix
and LED
MN860741
16MHz
Motor
Driver
7.235MHz
10.923MHz
LSU UNIT
Pa
rallel I/F
SHINE
(DZAC000273)
for 16pels/mm
Pr
inting
for 600dpi
Pr
inting
5MHz
Stamp
Fa
n
ILS PCB
Program
FROM
2MB
24.576MHz
MN195006
Si3021
Si3015
Handset
(option)
SC PCB
IEEE 1284
Transceiver
CPU
(V850/MA1)
LCD Unit
CPU
P
o
w
er Inlet
A
CI PCB
Heater
Control
+5VP
+5V
+24V
-12V
+3.3V
Low Voltage
Power Supply
AC
Ther
mistor
Fuser LAMP
Ther
mostat
Specific Countr
ies Only
.
Not Mounted
for USA, Canada
Registr
ation
Sensor
Exit
Sensor
B4 Width
Sensor
High Voltage
Power Supply
P
aper Chec
k
Sensor
T
oner
Sensor
SNSE PCB
ETXDN342A2E (120V)
ETXDN342E2E (230V)
IC1
IC18
IC5
IC6
IC9
IC7
IC13,
19
Q16
Q17
Q18
Q19
IC28
IC26
Q39
Q40
Q2
Q5
Q3
Q27
IC4
IC2
C5
F
acsimile Real Ima
g
e
Pr
ocessor
A/D Con
ver
ter
, White Shading
64 Le
vels Err
or Diffusion
Binar
y
Coding,
Scanning Data Reduction
System Handling and Ima
g
e
Na
vigation Engine
Ad
dress Decoder
, SDRAM Contr
ol,
DMA Contr
ol
W
atc
h-dog
Timer (Reset Contr
ol),
IEEE 1284 Contr
ol
CIS Contr
ol,
Blac
k Shading,
Motor Contr
ol
Print Quality Contr
ol,
Print Data Reduction
Print Engine Contr
ol (LSU & Heater)
32-bit RISC CPU (V850/MA1)
PNL CPU
I/F
Ima
g
e Code/De-code (BC/BE)
SDRAM Contr
o
l
I/O P
o
rt
SNST PCB 2/2
SNST PCB 1/2
Modem
G3 Signal Contr
o
l
DTMF Dialing
D
AA I/F
D
AA (Digital Access Arrang
ement)
Line
V
olta
g
e/Loop Current Monitor
A
C
/DC
T
ermination,
Ring
er Impedance
Ring Detect,
Pulse Dialing
Integrated Analog Fr
ont End (AFE)
IC3
16Mbits Flash R
O
M
Firmware Pr
ogram Code
Bac
k-up Data (TEL#,
P
arameter etc..)
8-bit CISC CPU (uPD780022A)
LCD Unit Contr
o
l
K
e
y Matrix Monitor
LED Contr
ol,
R
T
C
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