Chart B Data Circuit Problem

Chart B:

BCM Circuit:

CIRCUIT DESCRIPTION:
You have been directed to this chart as a result of a total loss of communication on CKT 800. This could be due to a wiring or element problem.

NOTES ON FAULT TREE:
1. This step checks for an open 800 CKT
2. The last step established that CKT 800 is not open. This step will check CKT 800 while it is operating. Normal operating voltage on CKT 800 is between .1 and 5 volts, fluctuating continuously.
3. If the dataline is functioning properly, a loss of ground to the IPC may be the cause of a blank IPC.