Panasonic UF-490 Service Manual / Other ▷ View online
33
Initial Flow 4
Door Open ?
SCANNER Initial
H
Y
N
Y
END
EJECT Start
B Point OFF ?
Jam Length
Over ?
Error(Jam) Set
Info. Code 031
Info. Code 031
Error(ADF Open) Set
Info. Code 061
L
N
+24LVL
CNP11.3 24V -> -> (1)Q28
-> 5V -> -> (77)IC1 CPU
-> 5V -> -> (77)IC1 CPU
34
Not change from 3.3V ?
Initial Flow 5
PRINTER Initial
STOP
L
Door Open
Door Open ?
+24LVL
CNP11.3 24V -> -> (1)Q28(3)
-> 5V -> -> (77)IC1 CPU
-> 5V -> -> (77)IC1 CPU
Regist Senser ON ?
Exit Sensor ON ?
Paper JAM
Paper JAM
H
H
L
L
nRSEN
nESEN
CNP7.4 3.3V -> -> (75)IC1 CPU
PC3.3 3.3V -> -> (76)IC1 CPU
Fuser Heat-up
(Lamp ON)
pSSRA
nSSR
nSSR
IC3 SHINE(28) 3.3V -> ->
(2)Q35(3) 24V -> -> CNP4.11
(2)Q35(3) 24V -> -> CNP4.11
Thermistor Open ?
Abnormal
Temparature ?
Device Error
Y
Device Error
Y
N
H
THERM
CNP7.1 -> (79)IC1 CPU
THERM
CNP7.1 -> (79)IC1 CPU
Increase under 0.2V ?
Main Motor ON
N
A
sec.
”V
14sec.
0.2V
35
Initial Flow 6
Stand-by
A
Internal Process
of High Voltage
pTR0
IC1 CPU(25) 3.3V -> ->
(2)Q16(3) 16V -> -> CNP6.5
(2)Q16(3) 16V -> -> CNP6.5
pCR1
pCR0
DRCK
IC1 CPU(24) 3.3V -> ->
(2)Q17(3) 16V -> -> CNP6.4
(2)Q17(3) 16V -> -> CNP6.4
IC1 CPU(23) 3.3V -> ->
(2)Q18(3) 16V -> -> CNP6.3
(2)Q18(3) 16V -> -> CNP6.3
IC3 SHINE(29) 3.3V -> ->
(2)Q19(3) 16V -> -> CNP6.2
(2)Q19(3) 16V -> -> CNP6.2
Check Low Toner
and No Cartrige
TSENCONT
IC3 SHINE(169) 3.3V -> ->
(2)Q44(3) 5V -> -> CNP15.4
(2)Q44(3) 5V -> -> CNP15.4
TONER
CNP15.5 3.3V -> -> (78)IC1 CPU
No Cartrige ?
Fuser Idle
(Lamp OFF)
STOP
Y
N
36
2 Schematic Diagram
2.1.
General Circuit Diagram
A
B
C
D
1
2
3
4
2
1
3
4
Drawing Name
General Circuit Diagram
Model
UF-490
SC
CIS
pSPKOT
GND
5
10
2
7
9
1
6
8
3
+5V
+5VP
GND
PNLSD
PNLRD
BZCLK
PNLRST
W
AKUP
PWSA
VE
BPNT
1
RS
DB2
5
DB7
2
DB1
7
DB6
4
DB0
10
DB5
3
E
9
DB4
8
R/W
11
DB3
6
13
V5
12
12
VSS
VDD
14
LCD
1 2
DBGCLK
DBGTXD
nBOOT
,GND
VPP
DBGRXD
nRESET
GND
4
3
L2
L1
3
T2
4
T1
Boot Board
AO
3
1
VLED
5
7
CLK
4
5
3
AGND
SI
2
7
6
6
GLED
2
1
4
+5V
10
+3.3V
7
5
3
7
1
6
+5VP
2
10
5
nMPOFF
GND
4
3
9
nSSR
1
6
8
4
11
9
+24V
2
GND
+24V
-5V
8
11
1
+24VM
2
12
pTR0
13
15
14
3
4
pCR0
Power Supply Unit
5
7
5
3
2
1
1
2
10
5
4
3
4
1
6
3
4
11
9
2
8
6
+5V
12
8
7
13
Polygon
Laser
3
B_
5
1
3 4
+24VM
2
4
2
1
5
A_
B
A
Motor
Speaker
1 2
Paper
2
1
+24V
nST
AMPON
STAMP
2
3
1 2
3
1
CN1
1
CN2
CN3
CN10
CN4
CN13
CN12
CN16
CN17
CN5
CN50
CN1
CN14
30
6
11
18
22
36
25
26
3
35
5
33
31
14
4
15
7
16
17
20
9
29
8
28
10
24
23
1
13
12
2
19
27
32
34
21
+24V
+24VD
+24V
nADF1
CN103
CN9
CN102
Thermistor
Fuser Lamp
Thermostat
Thermal Fuse
Fuser Unit
LINE
TEL
Centronics I/F
Note: CN4 / CN6 cannot be removed
(Soldered)
DGND
+24VM
nLDEN
nST
AR
T
nS/H
CLK
GND
nREADY
nVIDEO
L+5V
nHSYNC
DGND
DGND
ILS
TH1
TH2
2
4
3
1
5
DRCK
5
16
pCR1
4
3
5
3
4
2
1
4
3
2
1
GND
CN6
CN76
CN77
CN7
nESEN
TH1
TH2
+5VSE
TH2
+5VSE
GND
4
2 3 4 5
3
5
2
1
1
2
1
3
SNST
LSU
1
3
Power Cord
FG
ACI
CN101
CN15
TONER
TSENCNT
(GND)
pPCHK1
CN81
JP1
PNL
SNSE
2
1
1
2
3
Toner Sensor
(Magnetic)
GND
4
GND
1
5
4
6
10
8
2 3
7
9
5
5
T2
6
5
N.C.
T1
1 2
N.C
Black
(L)
White
(N)
L
N
G
1 2
6
5
2
1
3 2
1
3
2
1 2
1
3
CN16
2
4
7
6 7
6
Toner
Cartridge
FG
T
C D
*1 : Option
Transfer
Charge
Development
SRU
2
3
4
1
2
3
1
4
6
5
4
1
3
2
200M ohm
1
2
LED
*2
*2
*2 : Depends on the Specifications
Handset Kit
*1
*3 : Specific Destinations Only
*3
*3
*3
TEL Line Cable
(PTT Plug)
AC Line
*4
*4 : For Writing Boot Program
Toner Sensor
No Paper Sensor
Exit Sensor
CN73
11
11
+5VST
GND
GND
2
JP1
1
3
SNST
4
4
6
6
TONER
TSENCNT (GND)
TSENCNT (GND)
+5V
GND
TONER
nFNRDT
4
2
3
1 +24V
N.C.
MGND
CN8
DC-Fan
1
2
2
5
7
4
3
6
1
5
3
2
4
7
6
B4WID
BWLED2
GND
nAPNT
APLED2
APLED1
RCV (-)
MIC (-)
MIC (-)
RCV (+)
MIC (+)
4
3
+5V
nBLCNT
LED(1)
LEDCT1
SENSOR
FUSE
TRIAC
6
6
+24VM
Mounted : Other Countries
Not Mounted : N.A.
BWLED1
SELECT
DATA0
nFAULT
DATA5
Not Used
GND
nSTB
Not Used
GND
GND
nINIT
GND
PE
DATA7
DATA1
PLH
BUSY
nAUTOFD
GND
GND
GND
GND
GND
GND
Not Used
GND
DATA2
DATA4
Not Used
GND
GND
GND
GND
nSELIN
nACK
DATA3
DATA6
Clutch
2
3
1
4
Black
(L)
White
(N)
1
3
2
On
On
On
On
On
Detect
Detect
On
On
5
0
5
0
5
0
5
0
5
0
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