Ricoh 140F Manual de servicio - Página 9
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August 2nd, 1995
2.6. INTERFACE BOARD
(CN1-6) Serial Data (Incoming)
(CN1-7) Serial Clock
(CN1-9) Latch Signal
(CN1-8) Serial Data (Outgoing)
(CN2-5)
(CN2-7)
(CN2-6)
(CN2-4)
(CN1-11)
Cassette
INSL1
(CN1-12)
ID
INSL0
Creation
(CN2-2) OUTSL1
(CN2-1) OUTSL0
+5V
IC1 on the interface board controls the drive components as directed by con-
trol signals received from the host fax machine. It also monitors the sensors
in the unit and controls the LEDs to notify the users of any errors. IC2 is the
motor driver.
The host fax machine controls the paper feed unit(s) through a serial inter-
face. The fax machine sends the control signals to the installed paper feed
units one by one. Each paper feed unit then controls its drive components
and/or responds with sensor status signals to the host fax machine.
Two logical signals (DEF0 and DEF1) are used to identify how many paper
feed stations the unit is assigned. The cassette ID creation circuit gives a
unique number to each paper feed unit as shown in the following table and
as illustrated on the next page.
1st optional PFU
2nd optional PFU
3rd optional PFU
4th optional PFU
Up to four optional paper feed stations can be identified using these signals.
However, the number of optional paper feed stations which can be installed is
limited by the host fax machine's specifications. As an example, the H526
models can have only one optional paper feed unit, while the H515 models
can have up to two optional paper feed units.
+5V
IC1
+24V
INSL1
High
Low
Low
High
7
DETAILED SECTION DESCRIPTIONS
24V
(CN6-1) A
(CN6-2) +24V
(CN6-3) AB
IC2
(CN6-4) B
(CN6-5) +24V
(CN6-6) BB
24V
(CN5-2) +24V
(CN5-2) Clutch On [
+5V
(CN4-1) +5V
(CN4-2,3,4) LED On [
+5V
(CN3-5) +5V
(CN3-3) Paper Present [
(CN3-4) COM1
(CN3-2) Paper End [
(CN3-1) COM1
(CN3-9) Paper Size 0 [
(CN3-8) Paper Size 1 [
(CN3-6) Paper Size 2 [
(CN3-7) COM1
INSL0
DEF1
DEF0
High
Low
Low
Low
Low
High
High
High
Low
Low
High
High
INTERFACE BOARD
M
Paper Feed Motor
J
CL
24V]
Paper Feed Clutch
J
5V]
LEDs
J
5V]
Relay Sensor
J
5V]
Paper End Sensor
J
5V]
J
5V]
J
5V]
Paper Size Sensor
H110D501.wmf
Cassette ID
00
01
10
11