Mitel Sx 200 El/ml Technicians Handbook

Troubleshooting and Repair
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Troubleshooting
Disk Drive Maintenance
SX-200 LIGHT/DIGITAL Floppy Disk Subsystem 
Troubleshooting Procedures
Table 13 outlines the most likely causes of Floppy Disk Subsystem 
failure. 
Table 13:  Floppy Disk Troubleshooting Summary 
Step Possible Malfunction Source
1.Drive units require resets - power down the control bay (Bay 2 or Bay 
0), and power up again. Check for error codes on the Main Control 
Card numeric display - see Table 14.
2. 
Faulty backplane connections....

Technician’s Handbook
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NOTE: 1.Be aware of the difference between the code “E” and the code “E.”. “E” indi-
cates MCC error and “E.” indicates disk drive errors. 
2.If system is restarted at this point, the pending logs will be lost.
Table 14:  Floppy Disk Drive Error Code Summary
Error 
CodeLikely Cause(s)
E.
1Original system diskette has been replaced, and logs are pending. 
Either re-insert original diskette, or restart system. See Note 2.
E.
2Original system diskette has been replaced. Either...

Troubleshooting and Repair
93
Troubleshooting
Disk Drive Strapping
When replacing a floppy disk drive on an SX-200 LIGHT PBX, verify 
that the switch settings for the drives are set as follows:

Drive A: AT DC MO D0

Drive B: AT DC MO D1
When replacing a floppy disk drive on an SX-200 DIGITAL PBX, verify 
that the switch settings for the drives that are mounted on a floppy disk 
mounting card are set as follows:

Drive A: AT DC MO D0

Drive B: AT DC MO D0
On an ISDN Node, verify that the switch settings...

Technician’s Handbook
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Error Messages
Table 15:  SX-200 IP Node Troubleshooting Table 
Indication Possible Causes Action
WARNING: SX200 
Main control not 
connected or IP Node 
not supportedDefective Ethernet 
cablesReplace the Ethernet 
Crossover cable and 
CIM cable.
The Control Triple CIM 
card is programmed as 
a Dual CIM card.Reprogram the Triple 
CIM Card.
The CIM cable is 
connected to the 
wrong port on the 
SX-200 IP NodeCheck the hardware 
connections.
The IP Bay is not 
programmed in CDE...

Troubleshooting and Repair
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Troubleshooting
WARNING: Startup 
incomplete after 1800The DHCP server is 
not functioning 
properly.1. If youre not using a 
Mitel DHCP server, 
disconnect all DHCP 
servers
OR
Disconnect the IP 
Node from the subnet.
2. In the serial port 
window on the PC, 
type 
RetrieveDhcpDefaults.
3. Type Reboot.
4. Connect the BCC III 
Card to the Ethernet 
Switch with an 
Ethernet crossover 
cable.
5. Connect the IP 
Node to the Ethernet 
Switch.
6. Allow the IP Node to 
reboot.
If...

Technician’s Handbook
96
Test Line
The test line is on the ONS line card at Bay 1, Slot 1, Circuit 1 for the 
SX-200 EL/ML or Bay 2, Slot 1, Circuit 1 for the SX-200 LIGHT/ 
DIGITAL. An access code for Feature 18, Maintenance Function - Test 
Line, must first be programmed in CDE Form 02 (Feature Access 
Codes). 
Specifying Equipment From Test Line
Circuits are specified using their physical location numbers (bay, slot, 
circuit, subcircuit) or by Link and Channel number. 
A receiver circuit at location...

Troubleshooting and Repair
97
Troubleshooting
Table 16:  Test Line Command Codes
NumericAlphaCommand Codes Description
22 BCBusy Out Channel (Remove Channel)
26 BOBusy Out device
35 DLDump Logs
38 DTDirect Trunk select
72 RCReturn Channel
73 SDStop Dump Logs
77 RSReturn Device to Service
78 STStop Test Printers
82 TCTest Channel
83 TDTest Device
872 TPBTest Printer Bay_Slot_Circuit
873 TPETest Printer Extension_Number
877 TPPTest Printer Port 

Technician’s Handbook
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Test Line Indicator LEDs
After the maintenance person enters a command sequence, the MCC 
LEDs display the results as explained in the following table. 
NOTE:Failure of any test line command sequence necessitates using more sophisti-
cated maintenance tools. 
Table 17:  Test Line Status Indicator Codes
Code Meaning
PA The attempted operation was successful (pass).
FA The attempted operation was unsuccessful (fail).
(blank) System is waiting for command input.
II  Test was...

Troubleshooting and Repair
99
Troubleshooting
Test Line Tones
Approximately ten seconds after the maintenance person enters the 
test line access code on the test line set, a short ring burst, followed by 
dial tone is heard, indicating that the system is waiting for the command 
input. After the maintenance person enters a command sequence, the 
returned tone, described in Table 18, indicates the result of the action 
performed. 
Table 18:  Test Line Status Tones
Tone Type Meaning
Dial tone System is...

Technician’s Handbook
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