Specifications

Chapter 3 61
Troubleshooting
Self-Test Diagnostics (Step 1)
Figure 3-10 Non-Blinking LED Codes for Miscellaneous Hardware Failure
Then the failure is...
A2A23 Reference
A2A80A1 Audio Filter 1 - C-Message Filter
A2A80A2 Audio Filter 2 - 6 kHz BPF
A2A36 Receive DSP
A2A34 Data Buffer
= off
= rapid blink
= steady on or slow blink
LED Legend
If the second and third
LED patterns displayed
321
0
321
0
= don’t care