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Service Information
Table 5-4
Troubleshooting procedure
Step
Item/component
1
GND pad
2
+6V pad
3
+5V pad
4
+14.6V pad
5
+V pad
6
U105, pin 5
7
U105, pin 6
8
U100, pin 7
9
U100, pin 2
10
U100, pin 3
11
U100-U104, pins 10-18
*+3.5VDC present at +V pad under steady-state conditions. This voltage rises to +5.7VDC for about 100msec when relay configuration is
changed.
5-16
Required condition
+6VDC
+5VDC
+14.6VDC
+3.5VDC*
ID CLK pulses
ID DATA pulses
STROBE pulse
CLK pulses
DATA pulses
Low with relay energized;
high with relay de-energized.
Comments
All voltages referenced to digital ground
(GND pad).
Relay voltage.
Logic voltage.
Relay bias voltage.
Regulated relay voltage.
During power-up only.
During power-up only.
End of relay update sequence.
During relay update sequence only.
During relay update sequence only.
Relay driver outputs.
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