Read Panasonic UF-8300 / UF-8200 / UF-7300 / UF-7200 (serv.man2) Other Service Manuals online
15
UF-7300/7200
UF-8300/8200
2.2.8.
EEPROM Control Circuit
This machine has 2kbit EEPROM (IC502). Page Count Data, Calibration Data, etc. are saved on the IC.
The EEPROM control signals are explained as follows.
EEPCS :
This is the Chip select signal.
EEPCLK :
This is the Serial Data transfer clock.
EEPDO :
This is the Serial Data from CPU (IC504) to EEPROM (IC502).
EEPDI :
This is the Serial Data from EEPROM (IC502) to CPU (IC504).
SPC PC Board
High Voltage Unit
CHGCTL
DBPWM
DBCH
TRPWM
TRCTL
7
10
CN728
5
6
3
4
2
8,9
nCHGCTL
+24VIR
nDB
nDBCH
nTR
nTRCTL
+5VA
GND (+24V)
7
10
CN501
5
6
3
4
2
8,9
Charge Control
Circuit
Circuit
Transformer
Dev. Bias Control
Circuit
Circuit
Transformer
Transformer
Transfer
Control
Circuit
Control
Circuit
Transfer Roller
Cleaning
Control Circuit
Cleaning
Control Circuit
Transfer
Dev. Bias
Charge
OPC
Grid
Control
Circuit
Control
Circuit
Grid
OPC Drum
Unit
+24VIR
+24V
Right Cover
+5V
R540
R538
R539
8
54
9
58
10
IC504
Q503
Q502
Q505
Q506
L506
L509
L507
L508
L505
Q508
(Engine CPU)
Safety
Interlock SW
Interlock SW
27
3 DI
IC502 (EEPROM)
IC504 (CPU)
EEPDO
EEPDO
33
4 DO
EEPDI
EEPDI
29
1 CS
EEPCS
EEPCS
28
2 SK
EEPCLK
EEPCLK
R518
R517
SPC PC Board
Click on the first or last page to see other UF-8300 / UF-8200 / UF-7300 / UF-7200 (serv.man2) service manuals if exist.