Checking A7 Cpu Red Led Patterns (For Instruments With Llrmware Revisions 6.Xx And Below.) - Agilent Technologies HP 8719D Service Manual

Checking A7 CPU Red LED Patterns
The A7 CPU has four red LEDs that can be viewed through a small opening in
the rear panel of the analyzer. (See Figure 6-5.)
power
the
1. Cycle
Cycle the power on the analyzer and observe the four red LEDs. All four
If the four LEDs did not turn on, replace the A7 CPU after verifying the
power supply.
2. Hold in
the [j)
Press and hold down the ~~~ key while observing the four LEDs on A7.
The far right LED should be off. (See Figure 6-5.)
6.10 Digital ControlTroubleshooting
key