Read Panasonic UF-8300 / UF-8200 / UF-7300 / UF-7200 (serv.man2) Other Service Manuals online
10
UF-7300/7200
UF-8300/8200
2.2.3.
Reset Circuit
Reset signal is generated when the 5VDC Power Supply Voltage drops below 4.2VDC, or when the signal
pPRTRST or pSCNRST goes high. The reset circuit initializes the CPUs (IC504, IC102), and the ASIC
(IC402).
Approx. 100~800 ms after turning On the power, Pin4 of Reset IC (IC501, IC100) goes High.
pPRTRST or pSCNRST goes high. The reset circuit initializes the CPUs (IC504, IC102), and the ASIC
(IC402).
Approx. 100~800 ms after turning On the power, Pin4 of Reset IC (IC501, IC100) goes High.
19
6
nRST
IC504
IC402
R516
Q701
C520
C519
C517
3
4
1
2
IC501
VDD
OUT
GND
CD
Engine
nRESET
ASIC
Reset IC
pPRTRST
(Reset Signal from SC PC Board)
100-800 ms
5V
4.2V
4.2V
5V
0V
0V
VDD
(Pin2 of Reset IC)
(Pin2 of Reset IC)
RESET Signal
(Pin4 of Reset IC)
(Pin4 of Reset IC)
Timing Chart
Printer Reset Circuit
CPU
12
nRESET
IC102
R108
Q700
C107
C105
C102
3
1
2
IC100
+5V
+5V
VDD
OUT
GND
CD
Scanner
Reset IC
pSCNRST
(Reset Signal from SC PC Board)
Scanner Reset Circuit
CPU
Click on the first or last page to see other UF-8300 / UF-8200 / UF-7300 / UF-7200 (serv.man2) service manuals if exist.