Epson AcuLaser C8500 Service Manual page 552

EPSON AcuLaser C8500
Table 7-15. Signal Description - § § § § 9
Signal line
Detection signal for size of paper in cassette 1. (Analog
[1] SIZE SWITCH
value)
[1] FEED SOLENOID
On/off control signal for cassette 1 FEED SOLENOID.
ON(L) 24VDC
Signal for detecting presence of paper in the paper
[1] TRAY PAPER
cassette issued by the TRAY NO PAPER SENSOR.
SENSED(L) 5VDC
(High Paper not detected, Low: Paper detected)
Signal for detecting when paper in the paper cassette
[1] LOW PAPER
is low issued by the TRAY 1 LOW PAPER SENSOR.
SENSED(L) 5VDC
(High: Enough, Low: Low)
FEED SOLENOID coil resistance: 90
TURN CLUTCH coil resistance
Feed SWITCH description.
Size of paper in the paper cassette is determined by the on/off status of the
Paper Size Switches of the SIZE SWITCH ASSY. Paper Size Switch on/off
status and SIZE SWITCH voltage for each paper size are shown in the
following table.
NOTE: The Paper Size Switches when viewing the printer from the front are
from left to right: SW1, SW2, SW3, and SW4. "On" is "1" and "off" is
"0".
APPENDIX
Description
Ω Ω Ω Ω
o
± 10% (20 C)
Wiring Diagrams and Signal Information
Table 7-16. Size Switch Signals
Paper Size Switch
Paper size
SW1
No paper cassette 0
B5(LEF) *1 1
EXECUTIVE(LEF) *2
A4(LEF) 0
LETTER(LEF) 1
A4(SEF) *1 0
LETTER(SEF)*2
LEGAL14 (SEF) 1
B4(SEF) 0
A3(SEF) 0
LEDGER(SEF) 0
12" X 8" (SEF) 0
Nonstandard 1
Not used 1
Not used 1
Not used 0
Not used 1
Not used 1
*: When the paper size switch on/off status is same, one of the two shown below
is selected according to specifications.
*1: Milimeter unit spec., *2: Inch unit spec.)
Revision C
Voltage
(Unit: VDC)
SW2 SW3 SW4 SW4
0 0 0 0.275-0.293
1 0 0 3.671-3.715
1 0 0 1.396-1.445
0 1 0 3.098-3.152
1 1 1 2.248-2.298
1 1 0 4.247-4.276
1 0 1 1.680-1.730
0 1 0 0.834-0.871
0 1 1 1.116-1.157
0 0 1 0.554-0.583
1 1 1 4.537-4.554
0 0 0 -
0 0 1 -
1 1 0 -
0 1 1 -
1 0 1 -
7-50