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[FinNo-[In/Oue | Sgnainame[ ___Deseription
————+d
Write signal. A high state of this
signal writes data.
led
37
Out
| BCEK-OUT]|
Battery voltage check signal.
Goes high for a certain period
immediately before actuation of
the ready lamp.
| 38 | Ou |
Pc
| Personal counter advance signal.
39
TMR
Toner motor relay actuating signal.
A high state of this signal actuates
the toner motor.
Di
a
aca
Discharge lamp signal. A high state
of this signal actuates the discharge
@) 1C105 signal description
lamp.
[Pin No] In/Out Signainame] Description
Pa | [FOF _| Connected to GND (OV).
Out
A
Display drive signal. A high state
of this signal drives the display.
[a [ ie [380 oatesiena
Pa [e081]
ata signet
Display drive signal. A high state
of this signal drives the display.
as
Display drive signal. A high state
7
Data signal..
of this signal drives the display.
Display drive signat. A high-state
of this signal drives the display.
Data signal.
Ov.
Data signal.
12
Out
Display drive signal. A high state
of this signal drives the display.
° 5
Display drive signal. A high state
of this signal drives the display.
DB6
Data signal.
B7
Data signal.
Display drive signal. A high state
of this signal drives the display.
vD1
+5V supply.
fe) 5
oO
@ BCIN
: When the battery voltage drops below 2.27V,
it does not go high level (+5V) in the battery
check timing.
SF-7200
(2) Main circuit-2
(1) Detect circuit signals
@
PT
:
PT sensor output signal.
2.5msec
@
POF
The signal used to inform the LSI whether the
supply voltage is within
the regulated level,
which takes the following action.
:
ON
OFF
AC supply
|
| ante
DC supply
F
POF
1
P
1
(Generated within
70msec!
.
85msec
the power suppiy unit)
—
+;
\
@® HTO
The signal used to detect the open state of the
;
heat
roller thermistor.
If' the thermistor
is
open, its output goes high (10V).
@® HTL
The heat roller lower limit temperature detect
signal which goes high (10V) when the heat
roller temperature drops below 160°C.
@
HTH
:
The heat roller upper limit temperature detect
signal which goes high (10V) when the heat
roller temperature goes above 220°C.
@ WTLL
:
The
signal
used
to interrogate
if the
heat
roller temperature
is at the given rating of
120°C during power down.
A low on this line (OV) actuates the heater
lamp, and a high on this line (10V) deactuates
the heater lamp.
@ WTL
The signal used to interrogate if the heat roller
temperature is at the given rating of 180°C.
A low on this line (OV) actuates the heater
lamp, and a high on this line (10V) deactuates
the heater lamp.
e
TSG
Toner empty signal.
It goes low level (OV) when
the toner con-
centration decreases.
e@ TSW1
DV color sensing signal.
The respective color is in use. when the signal
is in low level (OV). (Black)
@
TSW2
:
DV color sensing signal.
The respective color is in use when the signal
is in low level (OV). (Red) .
e
TSW3
DV color sensing signal.
:
The respective color is in use when the signal
is in low level (OV). (Blue)
@
TSW4
DV color sensing signal.
The respective color is in use when the signal
is in low level (OV). (Brown)
@
LNSW :
Lens position sensing signal.
Goes low (OV) when the lens locates at the
given magnification position.
156-3
15
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