IJ4000 Impulse Jet
Appendix B: Theory of Operation
5765-018 Operations Manual Rev J
Page 60
IJ4000 SMART-IDS Main CPU PCB
Test Points:
TP1:
12VDC, power for display backlight. Turns on/off with soft powerswitch.
TP2:
5VDC, power for 5V logic. Also supplies the input voltage to the 3.3V regulator.
TP3:
3.3VDC, power for 3.3V logic. Also supplies the input voltage to the 1.8V regulator.
TP4:
1.8VDC, power for the CPU core.
LEDs:
D1:
Ethernet connector, Green. Flashes to indicate network traffic.
D2:
Ethernet connector, Green. Indicates valid network connection.
D1:
Yellow, flashes when the CPU is running.(On CPU module)
D4:
Green, indicates 3.3V is present.
D2:
Green, indicates 3.3V is present. (On CPU module)
GREEN LED
GREEN LED, VISIBLE
ON THE CONNECTOR
VIA LIGHT PIPE
J5
J1
J8
J6
P3
P1
P2
P7
P5
D2
D1
J4
J3
J12
J7
B1
L2
D4
L1
J11
VCC
TP3
TP5
+5V
JP1
J10
U12
TP1
+12V
C60