NEC Electra Elite 192, Hardware Manual

Page: 362 / 369

Issue 6 Electra Elite
9 - 20 System Maintenance
F1
Low Volume Problems
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
1. Perform Second Initialization, and test.
2. Perform First Initialization, and test with
default program.
3. Replace CPUB( )-U10 ETU.
Problem
solved?
Done.
Replace COI(8)-U10 ETU. Check line with dB
meter and/or contact
Telco.
Report Problem
to Telco.
Less than
-8 dB?
Line
Port
Reset or replace
COI(8)-U10, and
test again.
All lines?
Bridge on
system CO
line?
Remove it. All stations?
Move suspected bad line to
good COI(8)-U10 ETU port.
Move good line to original
COI(8)-U10 ETU port.
Run a dB level test at DMARK
on lines with 1 kHz test tone.
No less than -8dB at MDF is
required.
Replace
Multiline SLT.
Problem
on port or
line?