Agilent Technologies E4418B Service Manual page 125

Figure 6-3: Troubleshooting Guide - TTL Inputs
No
Yes
Apply TTL logic 0 pulse to RJ45 connector pin 5
Investigate Power
wrt pin 8. Apply TTL logic 1 pulse to RJ45 connector
Meter Failure
pin 6 wrt pin 8. See User's Guide Ch. 2 for timing.
Agilent E4418B/E4419B Service Guide
Start
Power Up
meter
POST
Pass?
Yes
Connect Sensor to Channel A
Connect Sensor to Channel B (if applicable)
Any Sensor
Errors?
No
Select
System/Inputs
More
Service
Self Test
Instrument Self Test
Self Test
Errors?
No
Select
Done
Zero/Cal
More
TTL Inputs On
A
End
Troubleshooting
Introduction
Yes
Investigate
Sensor Failure
6-7