Service manual

Avantra 36/44 Service Manual
2-8 Functional Analysis
2.3.3 The LUTH Motor Board (LMB)
The Luth Motor Board (LMB):
• Amplifies the motor preset value to the corresponding high voltage to drive
the main motor.
• Senses and limits the armature current.
• Receives and converts I/R pulse preset values.
Description of Inputs and Outputs (P/N 52024000100)
• X102 1, 2–24V AC input.
• X102 5, 6–0-24 DC output.
• X1 1, 2, 3–Optical interrupter.
• X3 1, 2–Tacho feedback to CPU.
• U201–Infrared receiver.
• X4 1,2–Motor overload signal.
2.3.4 The Agfa Terminal Board (ATB)
The Agfa Terminal Board (ATB):
• Displays convenient information
• Organizes the output from activated keys
• Organizes the input data
Description of Inputs and Outputs
1, 2–Data communication link between the LCB and the Agfa Terminal Board
(ATB). RS-232 serial data coded as ASCII characters are interchanged.
2.3.5 Sensors
• Optical Interrupter–This device consists of a transmissive sensor with four
(4) wires and connectors. The operating wavelength is 950 nm. The detec-
tor is a Photologic IC with Schmitt-Trigger output. Aperature size is 0.5 mm.
• Film Sensors (Input, Input/Output, Exit)–This sensor is an ultra low force
motion sensor. It features a long-life reed switch, an integral actuator arm,
and a magnet.
Operating Parameters:
Off point: Less than 10 ° rotation from rest position.
On point: Greater than 3 ° rotation from rest position.
• Temperature Sensor–The sensitive element is a platinum-coated ceramic
wafer manufactured by thin film techniques. The exact value is obtained by
laser trimming.