
DX-80 I
NSTALLATION AND
M
AINTENANCE
M
ANUAL
P7290 IMM
4-2
Symptom(s)
Diagnostic Aid
Cause(s)
Action
Memory strap in
"Cold Start"
position.
If the Memory strap is in the "Cold Start" position,
perform the Initialization and Power Up operation at
the end of the Installation Section of this manual.
Power Switch
Switch the KSU AC power switch to the “ON”
position.
AC Fuse
Switch KSU power to the OFF position and remove
cover (four screws). Locate the system power
supply in the upper left corner of the KSU interior
and inspect the AC fuse for continuity (DVM
required).
DC Fuse
Switch KSU power to the OFF position and remove
cover (four screws). Locate the system power
supply in the upper left corner of the KSU interior
and inspect the DC fuse for continuity (DVM
required).
No system operation.
Digital Executive
Telephones may have
data frozen on the display.
Erroneous LED operation.
CPU Heartbeat
LED Dark or Lit
steady.
SPI Buss Error
Switch KSU power to the OFF position and remove
cover (four screws). Then check for the following:
1. Locate each expansion module and verify the
ribbon cable connection is accurate and secure.
2. Check for improper aligning of module
connectors.
3. Detach all station cabling and retest.
4. Check all socketed IC's for good "seated"
connections.
5. Unplug one module at a time and retest until
failed component is found.
6. Perform Initialization and Power Up sequence.
Note: this is an emergency action since the
unique customer database will be erased and the
system will reboot with default database
programming.
7. If this does not clear the trouble, replace KSU1
and follow the Power Up and Initialization
procedure.
Содержание DX-80
Страница 1: ...C O M D I A L D X 8 0 DX 80TM Installation Maintenance Manual ...
Страница 10: ...DX 80 INSTALLATION AND MAINTENANCE MANUAL P7290 IMM TOC 6 ...
Страница 50: ...DX 80 INSTALLATION AND MAINTENANCE MANUAL P7290 IMM 2 20 ...
Страница 316: ...DX 80 INSTALLATION AND MAINTENANCE MANUAL P7290 IMM 3 266 ...
Страница 346: ...DX 80 INSTALLATION AND MAINTENANCE MANUAL P7290 IMM 4 30 ...