Mitel SX-200 DIGITAL Pabx Engineering Information Manual

							Troubleshooting 
POWER SUBSYSTEM 
4.19 The SX-ZOO@ DIGITAL PABX power subsystem consists of up to 
four bay power supplies, or up to two rear-door power sup- 
plies, depending. upon the configuration of the system. The optional 
uninterruptabie power suppiy (UPS) is optional, and is user-supplied; 
Charts 4-4 and 4-5 outline the troubleshooting procedures for the 
power subsystem. 
Page 4-14  
						

							Troubleshooting 
CHART 4-4 
REAR-DOOR POWER SUPPLY TROUBLESHOOTING PROCEDURES 
tep Action Description / Follow-up Remarks 
1 Check if the ‘AC POWER ON’ LED, located on the Yes: * Go to step 5. see Note 
rear panel of the power supply is on. No : l Go to step 2. 1 
2 Verify that the system is plugged securely into the l Replace / repair cord as required. 
commercial AC source l Go to step 3. 
3 Check the AC power LINE fuse located on the rear l If it has blown, replace it; otherwise, go see Note 
panel of the power supply. to step 4. 1 
4 Verify the commercial AC source with an AC 0 If commercial.AC source is out of spec, 
meter, or by connecting another device to it. ensure that a UPS is connected. 
@ Verify that the UPS is functioning 
correctly. 
l Go to step 5. 
5 Check if the CONVERTER INPUT circuit breaker is Yes: * Switch it to the ON position; if it trips to see Note 
tripped (OFF). the OFF position again, replace the power 1 
supply. 
No : l Go to step 6. 
6 Check the connection from the rear-door power l Repair / replace any faulty wiring. see Notr 
supply (harness) to the shelf backplane. l Go to step 7. 2 
7 Check that the TOP SHELF POWER switch on the * Go to step 6. 
maintenance panel/top panel is in the ON position. 
8 Verify that the maintenance panel cable is 
connected correctly to the Interconnect card inside 
the cabinet. 
9 Check backplane for bent pins, foreign material, 
damage, etc. 
10 Check the backplane voltages (from terminal block 
on upper left corner of backplane). a Repair / replace broken switchies). see Not 
* Repair / replace faulty wiring. 2 
l Go to step 9. 
0 If backplane is damaged, replace it; 
otherwise, go to step 10. 
0 If they are out of spec, go to step 11. see Note 
l If they are in spec, power supply is .3 
functioning correctly. 
11 Replace the rear-door power supply. 
1 
Notes: 1. Refer to Section MITL9108-093-353-NA, General Maintenance information for location 
of LEDs, fuses, inputs, and outputs of the rear-door power supply. 
2. Refer to Section MITL9108-093-200-NA, Shipping, Receiving and Installation, for de- 
tails on these connections. 
3. Refer to Section MlTL9108-093-200-NA, Shipping, Receiving and Installation, for the 
measuring points. See Tables 4-2 and and 4-3 for the expected voltages. Remove all 
peripheral wiring before making measurements. 
Page 4-15  
						

							Troubleshooting 
CHART 4-5 
BAY POWER SUPPLY TROUBLESHOOTING PROCEDURES 
jtep Action Description / Follow-up Remarks 
1 Check if the power switch on the front panel bay Yes: l Go to step 8. 
power supply is in the “ON” position, and the No : l The power supply is not turned on. Put 
associated LED is on. the power switch into the “ON” position. 
l Go to step 2. 
2 Verify that the system is plugged securely into the * Replace / repair cord as required. 
commercial AC power source. l Go to step 3. 
3 Check if the cabinet has a rear-door power supply. Yes: e Verify that it is functioning properly - see Note 
refer to the Rear-door power supply 1 
troubleshooting procedures. 
* If it is functioning properly, go to step 5. 
No : * Go to step 4. 
4 Check the connection between the AC line filter a Secure connections / replace cable ‘as see Note 
[on the rear door) and the AC distribution panel, required. 2 
located beneath the equipment shelves. e Go to step 6. 
5 Check the connection between the rear-door o Secure connections / replace cable as see Note 
power supply and the AC distribution panel, required. 2 
located beneath the equipment shelves. e Go to step 6. see Note 
3 
6 Verify the wiring inside the AC distribution panel. l Replace / repair wiring as required. _ 
e Go to step 7. 
7 Check connection from AC distribution panel to the * Secure connection / replace cable as see Note 
bay power supply. required. 2 
* Go to step 8. 
8 Check backplane voltages. * If they are out of spec, go to step 9. see Note 
* If they are within spec, power supply is 4 
functioning correctly. 
9 Replace the bay power supply. 
Notes: 1. Refer to Section MITL9108-093-200-NA, Shipping, Receiving and installation for in- 
formation on power supply configurations. 
2. Refer to Section MITL9108-093-200-NA, Shipping, Receiving and Installation for details 
on power supply cabling. 
3. In some cabinets the AC distribution panel is located on the floor of the cabinet, 
behind the equipment shelves. See Section MITL9108-093-200-NA for further details. 
4. Refer to Bay l/2 backplane, and Figure 2-2 for the measuring points; see Tables 4-2 
and 4-3 for the expected voltages. 
Page 4-16  
						

							Troubleshooting 
TB Pin Voltage 
I Minimum 
I Maximum 
-!= a Vdc 
0 Vdc 
- 5 Vdc 
- 10 Vdc + 7.6 
- 5.3 
- 10.5 + a.4 
- 4.7 
- 9.5 
- 48 Vdc 
GND or 0 Vdc. 
90 Vat - 52.0 - 45.0 
85.0 95.0  TABLE 4-2 
BAY POWER SUPPLY TEST POINT VOLTAGES 
Voltage 
+ 5 Vdc 
+ 12 Vdc 
- 12 Vdc 
- 5 Vdc 
- 28 Vdc 
-48 Vdc 
90 Vat 
- Minimum 
+ 4.925 
+ 10.8 
- 13.2 
- 5.5 
- 30.8 
- 53.76 
63.0 Maximum 
+ 5.075 
+ 13.2 
- 10.8 
- 4.5 
- 23.8 
- 40.8 
99.0 
TABLE 4-3 
REAR DOOR POWER SUPPLY TEST POINT VOLTAGES 
Page 4-17  
						

							Troubleshooting 
UNINTERRUPTABLE POWER SUPPLY (UPS) 
4.20 Any UPS may be used with the SX-200F DIGITAL PABX, pro- 
vided that it meets the requirements specified in Section 
MITL9108-093-ZOO-NA, Shipping, Receiving and Installation. Since 
these are available from a number of suppliers, only rudimentary trou- 
bleshooting procedures for the UPS are provided in this document. 
Reference should be made to the appropriate manual provided by the 
manufacturer of the UPS for any self-diagnostic capabilities. Chart 4-6 
outlines the troubleshooting procedures for the UPS. 
Page 4-18  
						

							Troubleshooting 
CHART 4-6 
UPS TROUBLESHOOTING PROCEDURES 
Step Action Description / Follow-up Remarks 
1 
Verify the connection between the UPS and the l Secure connection / replace cable as 
commercial AC power source. required. 
l Go to step 2. 
2 Verify the connection between the UPS and the l Secure connection / replace cable as 
PABX. required. 
l Go to step 3. 
3 Check if UPS is functioning correctly. Yes: l stop. 
No : l Go to step 4. 
4 Consult manufacturer’s instructions and make * IMPORTANT: IF IT IS NECESSARY TO 
adjustments. REPLACE THE UPS, THIS MUST BE DONE 
ONLY DURING PERIODS OF LOW OR, 
PREFERABLY NO TRAFFIC, AS THIS WILL 
HAVE AN ADVERSE EFFECT ON SYSTEM 
PERFORMANCE. 
Page 4-19  
						

							Troubleshooting 
MAINTENANCE / CDE TERMINAL 
4.21 Any terminal which is compatible with RS-232C type interface 
protocol may be used with the SX-200@ DIGITAL PABX. Since 
these are available from a number of suppliers, only rudimentary trou- 
bleshooting procedures are provided in this document. Reference 
should be made to the appropriate manual provided by the manufac- 
turer of the terminal for any self-diagnostic capabilities. Chart 4-7 
outlines the troubleshooting procedures for the video display terminal. 
Page 4-20  
						

							Troubleshooting 
CHART 4-7 
MAINTENANCE / CDE TERMINAL TROUBLESHOOTING PROCEDURES 
itep Action Description / Follow-up Remarks 
1 See Note 1. 
2 Verify the connection from the commercial AC l Secure connection / replace cable as see Note 
power source and the terminal. required. 2 
l Go to step 3. 
3 Verify the connection from the terminal’s RS-232 l Secure connection / replace cable as see Note 
socket to the RS-232 socket on the maintenance required. 2 
panel (FE-232 pins 2. 3, 4, 5 and 7 are used). 
* Go to step 4. 
4 Check if the terminal passes its own Yes: 8 Go to step 5. 
self-diagnostics. No : l Replace the terminal. 
5 Verify that the communication parameters of the 0 Go to step 6. see Note 
terminal match those of the maintenance port. \3 
6 Verify the wiring from the maintenance panel to l Secure connection / repair wiring as see Note 
the Bay 2 backplane. required. 4 
0 Go to step 7. 
7 Replace the terminal. 0 If problem persists, go to step 6. 
6 Refer to Main Control card troubleshooting l May be necessary to replace Main 
procedures. Control card. 
Notes: 1. If the terminal is out of commission, system maintenance can still be performed via 
either the testline interface or the attendant console. Refer to Sections 
MITLSOI 8-093-353-NA, General Maintenance Information and MITL9108-093-315-NA 
Attendant Console Guide for further details. 
2. Refer to Section MITL9108-093-351-NA, RS-232 Maintenance Terminal for details of 
the connections. 
3. Refer to Section MITL9!08-093-351-NA, RS-232 Maintenance Terminal for details of 
setting communication parameters. 
4. Refer to Section MITL9108-093-200-NA, Shipping, Receiving and Installation for details 
on wiring of the maintenance panel. 
Page 4-21  
						

							Troubleshooting 
PRINTER 
4.22 Any printer which is compatible with RS-232C type interface 
protocol may be used with the SX-200@ DlGlTAL PABX. Since 
these are available from a number of suppliers, only rudimentary trou- 
bleshooting procedures are provided in this document. Reference 
should be made to the appropriate manual provided by the manufac- 
turer of the printer for any self-diagnostic capabilities. Chart 4-8 out- 
lines the troubleshooting procedures for the printer. 
Page 4-22  
						

							Troubleshooting 
CHART 4-8 
PRINTER TROUBLESHOOTING PROCEDURES 
itep Action Description / Follow-up Remarks 
1 Test the printer; use the TEST DEVICE TYPE Pass: l Go to step 2. see Note 
PRINTER command. Fail: l Replace printer; if problem persists, 1 
go to step 2. see Note 
2 
2 Verify the connection from the commercial AC * Secure connection / replace cable as see Note 
power source and the printer. ’ required. 4 
l Go to step 3. 
3 Verify the connection from the printer’s RS-232 l Secure connection / replace cable as see Note 
socket to the RS-232 socket on the Bay 2 required. 4 
backplane IRS-232 pins 2, 3, 4, 5 and 9 are used). @ Go to step 4. 
4 Check if the printer passes its own Yes: 0 Go to step 5. 
self-diagnostics. No : l Replace the printer. 
5 Verify that the communication parameters of the e Go to step 6. see Note 
printer match those of the printer port. 5 
6 Replace the terminal. * If problem persists, go to step 9. 
9 Refer to Main Control card troubleshooting 8 May be necessary to replace Main 
procedures. Control card. 
-I 
Notes: 1. Refer to Section MITL9108-093-351-NA, RS-232 Maintenance Terminal for details of 
procedures. 
2. To pass the test, the printer should print an entire page of test data. 
3. If the terminal is out of commission, system maintenance can still be performed via 
the testline interface. Refer to Section MITL9018-093-353-NA, General Maintenance 
Information for further details. 
4. Refer to Section MITL9108-093-351-NA, RS-232 Maintenance Terminal for details of 
the connections. 
5. Refer to Section MITL9108-093-351-NA, RS-232 Maintenance Terminal for details of 
setting communication parameters. 
1 
Page 4-23