EST EST3X - Page 201

Chapter 7: Service and troubleshooting
EST3X Technical Reference Manual 191
Address
Label Source Description
0624
Backup Audio Output
Analog
3-ZAxx • There is an open audio NAC circuit, or
a
missing or wrong value EOL resistor
• A short is detected on the audio NAC
circuit
• The output voltage jumper is incorrectly
set
0625
Amplifier Daughter
Board
3-ZAxx The board is defective
0626
Thermistor
Supervision
3X-NET
RS-485
The thermistor is either missing or not
functioning
0626
Fuse Supervision 3-ZAxx There is an open fuse on the amplifier
0627
Measurement Fault 3X-NET
RS-485
The A/D readings are not reliable
0627
PAL Supervision 3-ZAxx The PAL chip on the amplifier is bad
0628
NAC Class A
Mismatch
3X-NET
RS-485
• The expected Class A configuration
does not match actual hardware
• The CLA-PS10 adapter may be missing
0640
Jumper Fault 3-OPS The jumpers are incorrectly set
0641
AtoD Converter
Failure
3-OPS There is an internal module failure
0642
City Tie Open 3-OPS N/A
0652
Input Supervision
Trbls
3-ASU (EAEC) The microphone or connections are
defective
0653
Phone Page Time
Out
3-ASU (EAEC) The phone page switch activated for a
period that exceeds the time limit set in the
3-SDU
0654
Audio Hardware
Mismatch
3-ASU (EAEC) There is a mismatch between the installed
ACHS and the ACHS configured in the
3-SDU
0655
RAM Diagnostic
Failure
3-ASU (EAEC) There is a memory failure on the EAEC
0656
Audio Default Failure 3-ASU (EAEC) • The memory card is missing
• The audio database does not exist
0657
All Call Minus 3-ASU (EAEC) The All Call Minus feature activated
0658
Audio Interface
Failure
3-ASU (EAEC) There is a 3X-PMI hardware fault
0659
Audio Class
Supervision
3-ASU (EAEC) A short or open is detected on a riser