Mitel SX-200 DIGITAL Pabx Engineering Information Manual

							Troubleshooting 
CHART 2-2 
EMERGENCY TROUBLESHOOTING PROCEDURES 
ttep 
Action Description I Follow-up Remarks 
1 Check if the green ACTIVE LED on the Main Control Yes: l Go to step 9. 
Card front panel is flashing. No : l Go to step 2. 
2 Press the SYSTEM RESET pushbutton on the front l If the Main Control card 7-segment 
panel of the Main Control card. displays are blank, go to step 3; 
otherwise go to step 11. 
3 Check if the POWER ON LED on the Bay 2 power Yes: l Go to step 4. 
supply is on (ensure the switch is in the ON No : 0 Go to step 8. 
position). 
4 Turn the Bay 2 power supply off, reseat the Main Yes: 0 Go to step 1 I. 
Control card, and turn the power on again. No : l Go to step 5. 
Anything on 7-segment displays? 
5 Turn the Bay 2 power supply off, unplug the Main l Reseat the Main Control Card; turn the see Fig 
Control Card, and verify that the flea clips are power back on. 2-l 
properly connected (particularly clips W4 and W8). l If the problem persists, go to step 6. 
6 Check power rails and continuity on the Bay 2 * Verify that the required voltage signals see Fig 
backplane. actually are present at the Wlain Controi 2-2 
card edge connectors. 
l Once verified go to step 7. 
7 Power down Bay 2, remove Main Control card, and Yes: 0 Possible EPROM problem (check revision see Fig 
check if EPROM IC is securely installed. label) - replace Main Control card. 2-3 
No : * If loose, plug in securely; go back to step 
the AC distribution frame, to the AC 
source. 
l If no cabling problems are found, refer to 
the Bay Power Supply troubleshooting 
procedures in Paragraph 4.19. 
Yes: l Stop. Continue to monitor system. 
No : a Press the SYSTEM RESET pushbutton on 
Page 2-4  
						

							Troubleshooting 
CHART 2-2 (Cont’d) 
EMERGENCY TROUBLESHOOTiNG PROCEDURES 
12 
13 
18 Action 
:heck for the following error codes on the Main 
:ontrol card 7-segment displays: 
0 
E 
0 
E 
1 
E 
6 E E 
3 4 or 
E 
2 
E 
7 
E 
b. 
Sequence: E 
2 8 9 b b 
- ANY OTHER ERROR CODE - Description / Follow-up l Power down Bay 2, remove Main Control 
card, check flea clip W3 - re-install or 
replace as required; go back to step 2. 
l If problem persists, replace Main Control 
card. 
8 Power down Bay 2, remove Main Control 
card, inspect installation of DRAM and DX 
modules. 
@ If improperly installed, install correctly, 
and go back to step 2. 
* If properly installed, problem likely with 
1. either DRAM or DX modules - replace 
Main Control card. 
0 Power down Bay 2, replace Main Control 
card. 
* Power down Bay 2, remove Main Control 
card, inspect installation of EPROM IC. 
* If improperly installed, install- correctly, 
and go back to step 2. 
e If properly installed, problem likely with 
EPROM IC - replace Main Control card. 
* Power down Bay 2. remove Main Control 
card, inspect installation of DRAM 
module. 
0 If improperly installed, install correctly, 
and go back to step 2. 
* If properly installed, problem likely with 
DRAM module - replace Main Control 
card. 
* 
GO to step 20. 
* Power down the Main Control card, and 
check the installation of the Decryption 
module. 
0 If it is installed incorrectly, install it 
correctly. 
l If installed correctly, likely problem with 
Decryption module; replace Main Control 
card. 
* Go back to step 2. 
* If this persists, go to step 26. emarks 
;ee Fig 
2-1 
see Fig 
2-3 
see Fig 
2-3 
see Fig 
2-3 
lee Note 
1 
see Not 
2 
Page 2-5  
						

							Troubleshooting 
CHART 2-2 (Cont’d) 
EMERGENCY TROUBLESHOOTING PROCEDURES 
Action Description / Follow-u 
ns as required, then go 
that the lock latch is closed. 0 If problem persists, go to step 22. 
. Replace diskette if damaged. 
l If not damaged, attempt to reset system 
o If problem persists, go to step 23. 
o If problem persists, go to step 24. 
Yes: * Go to step 25. 
position (up, with respect to the board). No : * Put switch into ON position, go to step 2. 
* If problem persists, go to step 26. 
Notes: 1. In this case, the normal test progression will take place, software will be loaded from 
disk, but will not be started; rather, the system resets This cycle will continue until the 
problem is corrected. 
2. A normal running system may show other error codes on the 7-segment displays 
during normal operation; however, during a system reset, only those error codes 
shown in steps 12 through 18 are possible. Other error codes may be: 
a) Disk error codes - see paragraph 4.16. 
b) Faulty card error codes - where the top 7-segment display indicates the Bay 
number and the bottom -/-segment display indicates the slot number. 
Page 2-6  
						

							g$T 
I.. . . . . . . . . . . 
no & 
On 
S3 0 
on 
4 no I 
no I 
Inn [I SVSTEi 
RESET 
El 
RESET 
ALARM 
0 
PLANE 
-IANSFf 
El 
A3 
II 
B3 0 
0 
0 
0 
0 
I IUMPER POSITIONS ARE 
NDICATED THIS WAY: 
0 TOP VIEW 
UOTE: ALL S3 SWITCHES 
MUST BE OFF 
(UP POSITION). 
PCTIVE 
WNOR ALARM 
MAJOR ALARM 
CRITICAL ALARM  
						

							BAY 2 SLOT 3+4 BAY 1 SLOT 7t8 BAY 1 SLOT 5t6 
E4 (DG) 0 
r-l 
.0-e 523-0 0 ABC 
NOT USED 
Jl 
TEMP SENSE pf 
 NOT USED 
J17A 
10  
PCM TO 
15 
I  BAV 3 
20 
Jl7B 
25 PCM TO 
SAV 4 
30 
;: 
-I s 
E. 
CONSOLE 
MAINTENANCE 
DISK DRIVE PANEL 
. . . . 
POWER 
.,27 
lb 
DISK DRIVE 
DATA/ADDRESS 
0 ABC 
6 
Ill25 NOT USED 
0 SD 
11130 J3 *a* 
T+R TEST LINE 0 . . J41 OCUP 
El (EDGI 
8 
E2 (DGi 
0 
WY 2 SLOT lt2 BAY 1 SLOT 3t4 BAY 1 SLOT lt2 
NOTE: J19 = LOCAL RS-232 CONNECTOR 
ON MAINTENANCE PANEL 
521 I REMOTE RS-232 CONNECTOR 
ON MAINTENANCE PANEL 
7276RZE1 
Figure 2-2 8X-200@ DlGlTAL PABX Backplane  Troubleshooting 
Page 2-8  
						

							Troubleshooting 
DX 
MODULE 
DRAM 
MODULE 
EPfiOM 
IC 
Figure 2-3 Main Control Card Module Locations 
Page 2-9 --’  
						

							Troubleshooting 
PROCEDURE 2 - CRITICAL ALARM 
General 
--- 2.06 The raising of a critical alarm indicates a fault of actual or 
potentially catastrophic magnitude has occurred. Such an alarm 
is usually accompanied by activation of the automatic power fail 
transfer operation in a bay, bays, or throughout the entire system. 
Chart 2-3 shows the steps to be taken in analyzing a fault resulting in 
the raising of a critical system alarm. Refer to Section 
MITL9108-093-353-NA, General Maintenance Information for details on 
alarms. 
Page 2-10  
						

							Troubleshooting 
CHART 2-3 
CRITICAL ALARM TROUBLESHOOTING PROCEDURES - SYSTEM 
#tep Action Description / Follow-up Remarks 
1 Check if system has gone into power fail transfer Yes: l Go to step 2. see Note 
mode - examine maintenance log. No : l Force the system into power fail transfer 1 
mode via the maintenance panel 
switches, and leave it in this condition 
until the system is repaired. . 
2 Check if the Main Control card appears to be Yes: l Go to step 3. see Note 
functioning correctly - check visual displays on No : l Refer to Emergency Troubleshooting 3 
Main Control card front panel. Procedures (Chart 2-2). 
3 If there are analog cards in the system, check if Yes: 0 Go to step 4. see Note 
they seem to be functioning correctly - check No : e Refer to Peripheral Control Card 3 
visual displays on control card front panels. troubleshooting procedures. 
4 Check maintenance log history for indications of Yes: a Refer to the appropriate troubleshooting see Note 
trouble before the critical alarm; any such No : e Go to step 5. 2 
indications? 
5 Identify the fault(s) which caused the critical alarm l Use the SHOW ALARMS command. see Note 
condition. * If maintenance cannot be accessed, refer 2 
to the Emergency Troubieshooting 
Procedures (Chart 2-2). 
0, Go to step 6. 
6 Refer to the appropriate troubleshooting * If this leads nowhere, go to-step 7. 
procedures as indicated by the alarm report. 
7 Check maintenance log for possible cause(s). * If this uncovers a clue, refer to the see Note 
appropriate troubleshooting procedures; 2 
otherwise go to step 6. 
6 Check if the bays have power. Yes: 0 Go to step 9. 
No : 0 Refer to the power supply 
troubleshooting procedures. 
9 Exercise call processing to test stability. e Make station-to-station calls, see Note 
station-to-trunk calls, etc. 4 
* If critical alarm persists to this point, go 
to step 10. 
10 Refer to the Power Fail Transfer card 8 If the PFT cards appear functional, go to 
troubleshooting procedures. step 11. 
11 Refer to the Main Control card troubleshooting 
procedures. 
Notes: 1. Refer to Section MITL9108-093-353-NA, General Maintenance lnformation for details 
on the power fail transfer switches. 
2. Refer to Section MITL9108-093-351-NA, RS-232 Maintenance Terminal for information 
on procedures. 
3. Refer to Section MITL9108-093-353-NA, General Maintenance Information for detaits 
on control card status indicators. 
4. Avoid using stations or trunks under Power Fail Transfer (PFT) control. 
Page 2-l 1  
						

							Troubleshooting 
PROCEDURE 3 - MAJOR ALARM 
General 
2.07 A major alarm is raised when a serious degradation of service 
occurs. The major alarm is activated when a preprogrammed 
percentage of ports fail, or when any common control card fails. Refer 
to Section MITL9108-093-353-NA, General Maintenance Information 
for further details on alarms. Chart 2-4 outlines the troubleshooting 
procedures for both system-related major alarms and bay-related ma- 
jor alarms. 
Pa’ge 2-12  
						

							Troubleshooting 
CHART 2-4 
MAJOR ALARM TROUBLESHOOTING PROCEDURES 
Action Description I Follow-up 
dentify the fault(s) which caused the major alarm 
ondition. 
1 l Use the SHOW ALARMS command. 
l If maintenance cannot be accessed, refer 
to the Main Control card troubleshooting 
procedures. 
l Go to step 2. 
2 lefer to the appropriate troubleshooting * If this leads nowhere, go to step 3. 
rrocedures as indicated by the alarm report. 
3 Check maintenance log for possible cause(s). l If this uncovers a clue, refer to the 
appropriate troubleshooting procedures. 
0 If this is a system major alarm, or a 
digital bay major alarm, go to step 4. 
* Otherwise go to step 6. 
4 Check if the affected bay(s) have power. (es: l Go to step 5. 
Uo : 0 Refer to the bay power supply 
troubleshooting procedures. 
5 Check if the Main Control card appears to be fes: * Go to step 8. 
unctioning correctly. Uo : e Refer to the Main Control card 
troubleshooting procedures. 
6 Check if the affected bay(s) have power. les: l Go to step 7. 
Uo : * Refer to the rear-door power supply 
troubleshooting procedures. 
7 f there are analog cards in the system, check if fes: l Go to step 8. 
hey appear to be functioning correctly. Vo : * Refer to Peripheral Control Card 
troubleshooting procedures. 
a Check connections at the backplane (see Fig. 2-2). 0 Secure connections / replace cable as 
required. 
* Go to step 9. 
9 Check maintenance log history for indications of Yes: l Refer to the appropriate troubleshooting 
trouble before the major alarm; any such procedures. 
indications? No : * Go to step 10. 
10 Check if any other observable cause exists for the Yes: * Refer to the appropriate troubleshooting 
alarm. procedures. 
No : * Alarm may have been caused by a 
transient condition; record details and 
monitor the system’s progress. 
- 
?e Note 
1 
ze Note 
2 
ee Note 2 
ee Note 3 
Notes: 1. Refer to Section MITL9108-093-351-NA, RS-232 Maintenance Terminal for details of 
procedures. 
emarks 
2. Refer to Section MITL9108-093-353-NA, General Maintenance Information for details 
of control card status indicators. 
3. Refer to Section MITL9108-093-200-NA, Shipping, Receiving and Installation for loca- 
tion and connections of the interconnect card. 
Page 2-13