Internal Components
VC3500 User’s Manual
Valco Cincinnati
56
CPU Board
PN 151xx362
Connectors
J1, J2
Connection for the optional RS232 daughter board
J3
Connection to LCD/touchscreen module via a 20-pin ribbon cable
J4
Connection to glue inspection board (VC3700 only)
J5, J6
Connection for the optional channel 3 and 4 logic daughter board.
J7 (not used)
In early models, connection to LED board to deliver analog pressure feedback signal
to CPU
J8
Connection to interface board via a 26-pin ribbon cable
J9
Connection for 17VDC supply voltage from the power supply board
Indicators
D1 (Reset)
When lit, this red LED indicates that the main processor (68000) is being given a
hardware reset.
Jumpers
2/4 Channel Select
A wire jumper near the center of the board determines whether two-channel or four-
channel software is utilized:
•
Installed—A jumper installed dictates that two-channel software is use.
•
Not installed—No jumper dictates that four-channel software is used.
Switches
A pushbutton near the upper left corner provides a manual reset function.
Test Points
TP1 (CLOCK)
8 MHz, 5V digital clock signal from Oscillator U7 for main processor U1.
TP2 (CNTR-CLK)
5V encoder signal gated by a timer from U17 (68230, PB6). These gated encoder
pulses are counted by U9 (74HCT293).
Periodically, the 68000 main processor queries this binary count through port lines
PA0 through PA7 of U17. The 68000 main processor then calculates line speed from
knowing the number of encoder pulses in a given time period.
TP4 (PRESSURE)
This analog signal (0 to 5VDC) represents the air pressure sensed by the EPC-6.
TP3 (MIN SPEED)
This signal will be low when the line speed is Greater than minimum speed. This
signal will be high when the line speed is Lower than minimum speed.
TP5 (+5V)
Small pad located near lower right corner of board.
TP6 (GND)
A U-shaped pad on the right edge provides the reference for all logic signals.
Summary of Contents for VC3500
Page 1: ...VC3500 User s Manual Software Version 3 X Manual Number MCO35 Manual Release Date July 1999 ...
Page 19: ...Installation VC3500 User s Manual Valco Cincinnati 16 Figure 8 Internal Connections Diagram ...
Page 88: ...VC3700 User s Manual Software Version 3 X Manual Number MCO34 Manual Release Date July 1999 ...
Page 181: ...VC3500 VC3700 Troubleshooting Manual Manual Number MC048 Release Date May 1999 ...
Page 185: ...VC3500 VC3700 Troubleshooting Manual Valco Cincinnati Page 1 System Level Documents ...