Panasonic DP-2500, Technical Manual

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34
1.2. Power On Initial Flow Chart
1.2.1. Fax
<Check Output : If Signal is not correct, each IC
might be defective >
API IC14API(32) : Low / High
CPU(CS0)
IC1CPU(50) -> IC5MSC (23:CS04)
-> (2) IC14API
CPU (RD)
IC1CPU(43) -> IC5MSC(10:IORD)
-> (7) IC14API
CPU(A1-3)
IC1CPU(8,9,10) -> IC5MSC (14,
16,17:IOA1-3) -> IC14API(9,10,11)
CPU(D0-16) IC1CPU(D0-16) -> IC14API (12 -20)
CPU(IRQST3V) IC1CPU(45) (3V)
Power CNP101(9)5V -> (1)IC59(2)3.3V -> CPU
Master
Clock 7.16Hz -> (94)IC1CPU( 107)14.32MHz
CK14MLV
XTAL
-> (175)IC5MSC
Reset ResetIC4(2) -> -> (173)IC5MSC(217)
-> ->(108)IC1CPU
<Check Output : If Signal is not correct, each IC
might be defective >
MSC(CS08) IC5MSC(26) -> (40)IC28DANCE
MSC(CS05) IC5MSC(25) -> (134)IC34BRIDGE
<Check Output : If Signal is not correct, each IC
might be defective >
CPU(PNLTXD) IC1CPU( 131) -> IC6 -> CNP108.8
CPU(PNLRXD) IC1CPU( 130) <- IC5MSC(219) <- CNP108.7
CPU(PNLCK) IC1CPU(
CPU(PNLRST)
PNLCKEN
PNLCL
PNLRXD
PNLTXD
Power ON
Is Update Memory Card
Installed IC60API(32) is Low ?
Initial Flow
CPU I/O Port Set
Y
Y
N
N
Panel Initial
Hardware Reset
Update Program
I/O Device Reset
I/O Device Port Set
1
0
Is program date
Same?
Boot Program in CPU Start
DRAM Working Area Clear
System Program (FROM) Start
0V
3.5V
<Check Output : If Signal is not correct, each IC
* Check outside view of SC PCB before checking signal.
Especially check whether CNP104 (FROM Card) pins
short or not.
might be defective >
0V
3.5V
5V
0V
5V
0V
3.3V
3V
0V
TX RX
3.3V
0V
IC14API(47)0V -> CNP108.9
IC1CPU(66) IRQPNL3V
132) <-> IC 4(1) <-> CNP108.6
51) PNLCKEN
IC1CPU(