Service manual

Avantra 36/44 Service Manual
2-4 Functional Analysis
2.3.1.1 LCB Inputs and Outputs
Inputs and outputs include:
• Digital input and output
• Analog input
Description of LCB Inputs and Outputs
• X501, Input sensors, safety switches (only for OLP input and output sen-
sors and cassette sensor).
Digital input. (active state = high).
Connections:
-1 to 8 and 14 to 21 connected to the input sensors P1 to P8
-Only for OLP: -9/10 and 22/23 connected to input and output sensors
and cassette sensor
-11/24 connected to the LMB pcb X4A
-12/25 conneced to the 6 or 4 safety switches (via the LPB pcb X1-13
and X2-2 and the
Optocoupler pcb)
NOTE: The latest production 44 OLPs have two ‘front box’ and four
‘’top lid’ safety switches.
• X500, Temp and Exit sensor(s) input–Temp sensor inputs. Temperature
sensor channels are analog input. A software controlled amplifier gives
impedance matching to sensors of platinum, type PT500, used for measur-
ing developer/fixer/dryer temperatures. The amplifier limits the operating
area between 0 and +100 ° C.
The exit sensor channel (only for OLP) channel is a digital input.
Connections:
-1 & -6 connected to P30 exit sensor (only for OLP)
-3 & -7 connected to P16 dryer temperature sensor
-4 & -8 connected to P17 fixer temperature sensor
-5 & -9 connected to P18 developer temperature sensor
• X503, Low and empty level sensors, tacho out signal, waste sensors. Level
input accepting square wave signals (50 Hz). Used for level measurements.
Signals transmitted and received are galvanically separated from all other
signals. Pulse input available to pick up pulses with a frequency of up to
400 Hz.
Connections:
-1/9 connected to developer/Fixer tank level sensor
-2/10 connected to P33 replenishment tank empty sensor
-3/11 connected to P40 waste developer level (opt.)
-4/12 connected to X3 LMB 02 pcb tacho out