Siemens Saturn Iie Epabx General Description Manual
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SATURN IIE EPABX Maintenance and Troubleshooting - A30808-X5130-DllO-l-8920 Issue 1, May 1986 Table 4.05 Allowable Voltage Ranges MODULE/OUTPUT NOMINAL VOLTAGE VOLTAGE RANGE CONNECTOR-PIN LTUPS l + 5Vdc + 4.9 tp + 5.2 Jl-2, -3, -12, -13 (if system is equipped + 12Vdc +11.3 to +12.7 Jl-1, -11 with LTU shelf(s)) -12Vdc -11.3 to -12.7 Jl-5, -15 - 5Vdc - 4.9 to - 5.2 Jl-4, -14 PSU - 5Vdc - 4.9 to - 5.2 JlO-1 + 5Vdc l * * + 4.9 to f 5.2 J9-1, -2, -3, :4; Jll-1, -2; J6-3 + 12Vdc +11.3 to -1-12.7 JlO-10, -11; Jll-4, -5; J6-6 -12Vdc -11.3 to -12.7 JlO-12 MSM l (+5MEM/+5B) + 5Vdc l * + 4.9 to + 5.3 JlO-3 RGEN 9OVac (RMS) @ 20Hz 75.0 to 100.0 (Not directly measurable) RACIRMW 9OVac (RMS) @ 20Hz See Figure 2.12 J7-6 to Basic Shelf, J7-7 (for 2 seconds) to LTU Shelf 1: J8-7 to +97Vdc (for 1 second) LTU Shelf 2: J8-8 to alternating LTU Shelf 3’ -48PS0 -488 -48Vdc -43.0 to -53.0 J2-1 -48P -48Vdc -43.0 to -53.0 J2-3 -48PSl * (if an Expansion Cabinet is included) -488 -48Vdc -43.0 to -53.0 J2-1 -48P -48Vdc -43.0 to -53.0 J2-3 * Optional. l * If optional MSM is installed, PSU +5 Vdc output must be adjusted to 50 millivolts below +5MEM/+5B output provided by MSM (with memory PCBs installed). Adjustment (+5 V ADJUST) is accessible through PSU front panel (refer to Figure 2.01). (a) Replace the fuse. (c) Replace the fuse again. (b) If the fuse blows again, replace the PSU. (If op- tional MSM is installed, adjust PSU +SVdc out- put versus MSM output as specified in Table 4.05.) 4. If an RAC fuse has blown, NOTE: If it is known or believed that a previous event or or action by the craftsperson may have caused a transient fault condition which caused the fuse to blow, proceed to step (a) below; otherwise proceed to step (b) below. (1) If the fuse does not blow, a subscriber line module (SLMA-0, SLMA-S, or SLAl6 PCB) is at fault. Reinsert the subscriber line mod- ules in the shelf, one at-a-time and recheck the fuse after each module is inserted. If the fuse blows after reinserting a module, the module is defective. Replace the module. (2) If the fuse blows again, the most probable location of the fault is the PSU. Replace the PSU. (If optional MSM is installed, adjust PSU +SVdc output versus MSM output as specified in Table 4.05.) (a) Replace the fuse. If the fuse blows again, pro- 5. ceed to step (b) below. If a circuit breaker has tripped to the off (down) po- sition, (b) Remove all subscriber line modules (SLMA-0, SLMA-S, or SLA16 PCBs) in the associated shelf. Do not remove the PIMD, SLMD, DTMF, trunk (TMBA-2, TMBA-4, TMBM, or TMIE PCBs) or common control (CE PCBs) modules in the shelf. (a) Switch the circuit breaker to the on (up) position. (1) If the circuit breaker does not trip to off im- mediately, continue to observe it for a period of time to determine that it remains on. Also, check system for proper performance 4-19
A30808-X5130-DIIO-l-8920 Issue 1, May 1986 SATURN IIE EPABX Maintenance and Troubleshootrng (b) If the circuit breaker trips off (down) again, switch it on again. (1) If the circuit breaker does not trip to off im- mediately, continue to observe it for a peri- od of time to determine that it remains on. Also, check system for proper performance. (2) If the circuit breaker trips off again, replace the associated power supply as indicated below: BASIC PS circuit breaker: replace the PSU. (If optional MSM is installed, adjust PSU +SVdc output versus MSM output as specified in Table 4.05.) LTUPSO circuit breaker: replace the LTUPS on LTU Shelf 1. LTUPSl circuit breaker: replace the LTUPS on LTU Shelf 2 in the Expansion Cabinet. LTUPS2 circuit breaker: replace the LTUPS on LTU Shelf 3 in the Expansion Cabinet. -48PSO circuit breaker: replace -48PSO. -48PSl circuit breaker: replace -48PSl. (3) If the circuit breaker trips off again, the most probable location of the fault is the PSU. Replace the PSU. (If optional MSM is in- stalled, adjust PSU +SVdc output versus MSM output as specified in Table 4.05.) b. If the fuses and circuit breakers are normal but all LEDs on the cabinet(s) are extinguished (i.e., no calls are be- ing processed), perform the following voltage checks: 1. Check the ac input voltage to the Basic Cabinet: (a) Connect one lead of the DVM to pin 1 and the other lead to pin 3 of connector Pl (connected to Jl) on the rear panel of the PSU (refer to Figure 4.00). Be careful not to damage the connector housing or contacts. (b) If ac voltage is measured, replace the PSU. (If optional MSM is installed, adjust PSU +5Vdc output versus MSM output as specified in Table 4.05.) (c) If no ac voltage is measured, check the ac vol- tage at the ac power source outlet. (1) If no ac voltage is measured, commercial power is not being supplied to the SATURN System. (2) If the ac voltage is correct at the ac power source outlet, check power cable and con- nections in cabinet junction box (refer to Figure 4.01). 2. To check the ac input to a particular -48PS module, (a) Connect one DVM lead to pin 1 and the other lead to pin 2 of the plug mated to connector Jl 4-20 on the -48PS module (refer to Figure 4.01). Be careful not to damage the plug housing or contacts. (b) If no ac voltage is measured, replace the PSU. (If optional MSM is installed, adjust PSU +5Vdc output versus MSM output as specified in Table 4.05.) 3. Check the dc output voltages from the PSU (+5V, SV, +12V and -12V) appearing at connectors J47 and J48 on the Basic Shelf backplane (refer to Figure 4.02). For each voltage shown in Figure 4.02, con- nect the common (-) DVM lead to the ground bus- bar and insert the positive (+) DVM lead into the associated wire slot of the wiring harness plug. Be careful not to damage the plug housing or contacts. (a) If only one output voltage from the PSU to the Basic Shelf backplane is low (refer to Table 4.05 for the acceptable voltage ranges), suspect that excessive current load on that output is causing current foldback protection to be in effect. This may be due to a short circuit or partial short cir- cuit in a PCB installed in the Basic Shelf or the PSU may be defective. To isolate the fault, pro- ceed as follows: (1) (2) (3) Remove all PCBs in the Basic Shelf and recheck the incorrect voltage. If the voltage remains low, replace the PSU. (If optional MSM is installed, adjust PSU +5Vdc output versus MSM output as speci- fied in Table 4.05.) If the voltage returns to normal after remov- ing all PCBs in the Basic Shelf, a PCB is probably at fault. Reinsert the PCBs in the shelf, one at-a-time and recheck the voltage after each PC8 is inserted. If the incorrect voltage reading returns after inserting a PCB, the PCB is defective. Replace the PCB. (b) If all PSU output voltages are low as measured at the Basic Shelf, the PSU may have ex- perienced an overvoltage condition at its output which caused the overvoltage protection circuitry to latch the PSU into a shut down mode. This may be due to a short,circuit or partial short cir- cuit between two output voltages. When a short circuit is cleared, it is necessary to switch the BASIC PS circuit breaker on the PSU to off (down), then on (up) again, to clear the latched shut down condition. To isolate the faulty equip- ment proceed as follows: (1) Remove all PCBs from the Basic Shelf (2) Switch the associated BASIC PS circuit breaker on the PSU to off (down), then on (up) again. Check the PSU output voltages once again at the Basic Shelf. If the voltages remain low, replace the PSU. flf ootional MSM is installed, adjust PSU +5Vdcbutput versus MSM output as specified in Table 4.05)
SATURN IIE EPABX A30808-X5130-DllO-l-8920 Maintenance and Troubleshooting Issue 1, May 1986 Jg,(I, j-J11w
SATURN IIE EPABX A30808-X5130-DllO-l-8920 Maintenance and Troubleshooting issue 1, May 1986 I J2/P2 Pin 1 -48Vdc (-488) 2 Ground 3 -48Vdc (-48P) 4 Ground Jl/Pl Junction LINE-AC IN LINE AC IN Pin Box (AC%@ IN) (AC#l IN) 1 AC Line Note 2 2 AC Neutral 3 AC Ground -48PSo Note 1 PSU J2 Notes: 1. When -48PSl is installed, voltages on connectors Jl and J2 are the same as those on -48PSfi. 2. Second AC input is required only when expansion cabinet is used and -48$PSl is installed. Jumper plug at PSU J2 is removed and second AC source is connected to J2. Figure 4.01 -48PSO Module Power Connections 4-22
SATURN IIE EPABX Maintenance and Troubleshooting A30808-X5130-DllO-l-6920 Issue 1, May 1986 (3) If the voltages return to normal after remov- ing all the PCBs, a PCB has probably short- ed. Reinsert the PCBs in the shelf, one at a time, and recheck the the PSU output vol- tages at the Basic Shelf after each PCB is inserted. If the low voltage readings return after inserting a PCB, the PCB is defective. Replace the PCB. (c) If all output voltages from the PSU are zero and ac is applied to the input, switch off all PSU cir- cuit breakers and replace the PSU. (If optional MSM is installed, adjust PSU +SVdc output ver- sus MSM output as specified in Table 4.05.) c. If PSU circuit breakers and fuses are normal and the sys- tem is processing some calls (i.e., status indicators on the CIOP PCB are decrementing), check appropriate vol- tages for the shelf or shelves experiencing problems. If problems appear to be in the Basic Shelf, check dc in- put voltages to the shelf. If problems appear to be in an LTU shelf, check the ac input voltage to the shelf LTUPS then check the dc output voltages provided by the LTUPS. To check the ac input to a particular LTUPS, 1. Connect one lead of the DVM to pin 1 and the other lead to pin 2 of the LTUPS ac input connector on the raceway (refer to Figure 4.03). Be careful not to damage the connector housing or contacts. 2. If no ac voltage is measured, replace the PSU. (If optional MSM is installed, adjust PSU +5Vdc out- put versus MSM output as specified in Table 4.05.) d. If the ac input voltage to the LTUPS is correct, check the dc output voltages from the associated LTUPS module. The LTUPS output voltages can be checked at connec- tor Jl on the LTUPS and at connectors J42, J43, and J44 on the LTU shelf backplane. To check the output vol- tages, refer to Figure 4.03 for the location of the connec- tor on the rear of the LTUPS and Figure 4.04 for the locations of connectors J42, J43, and J44 on the LTU shelf backplane. For each voltage indicated in Figures 4.03 and 4.04, connect the common (-) DVM lead to the ground busbar and insert the positive (+) DVM lead in the associated wire slot of the connector. Be careful not to damage the connector housings or contacts. 1. If only one output voltage is low (refer to Table 4.05), suspect that excessive current load on that output is causing current foldback protection to be in effect. This may be due to a short circuit or partial short circuit within a PCB installed in the shelf, or the LTUPS module may be at fault. To isolate the faulty equipment proceed as follows: NOTE: If the +5Vdc is low, the voltage can be in- creased by turning the +5 V ADJUST potentiometer on the front of the LTUPS clockwise. (4 (b) w 2. Remove all PCBs in the LTU shelf and check the voltage again. If the voltage is still low, replace the LTUPS module. If the voltage returns to normal after removing all the PCBs, a PCB has probably shorted. Reinsert the PCBs into the shelf, one at a time. Check whether the low voltage returns after in- serting each PCB. If the low voltage returns af- ter inserting a PCB, the PCB is defective. Replace the PCB. If all output voltages from the LTUPS module are low, suspect that the LTUPS module has ex- perienced an overvoltage condition at its output which has caused the overvoltage protection cir- cuitry to latch the LTUPS into a shut down mode. This may be due to a short circuit or partial short circuit between two output voltages. When the short circuit is cleared, it will be necessary to switch the associated LTU shelf input circuit breaker OFF and then ON to clear the “latched shut down con- dition.” (a) Remove all PCBs in the LTU shelf. (b) Switch the LTU circuit breaker on the PSU mod- ule off and then ON to determine if the shut down condition is cleared. (c) Check the LTUPS output voltages again. (1) If the voltages are still low, replace the LTUPS module. (2) If the voltages return to normal after remov- ing all the PCBs, the latched shut down condition has cleared, indicating that a PCB has probably shorted. To determine which PCB(s) is defective, reinsert the PCBs into the shelf, one at a time. After in- serting each PCB, again check the output voltages of the LTUPS module. If the low voltages return after inserting a PCB, the PCB is defective. Replace the PCB. (3) If all output voltages from the LTUPS mod- ule are zero and there is ac input to the module, replace the LTUPS module. 4-23
A30808-X5130-DllO-l-8920 Issue 1, May 1986 El +5Vdc J46IP46 Pin 1 RAC/RMW 2 Ground 3 -48Vdc (-48P) J47IP47 Pin 1 -5Vdc 2 -48Vdc (-488) 3 Ground 4 Ground E2 + 5Vdc J48lP48 Pin 1 -12Vdc - 2 +12Vdc 3 +12Vdc 4 Ground 5 +5Vdc (a5B) ’ E3 -i- 5Vdc ’ E4 +5Vdc Figure 4.02 Basic Shelf Backplane Power Connections
I SATURN IIE EPABX Maintenance and Troubleshooting A30808-X5130-DllO-l-8920 Issue 1, May 1986 Raceway PI Pin 1 AC Line 2 AC Corn1 3 GND nor Jl Pin Pin Pin 1 +12v 6 RET 11 +12v 2 +5v 7 RET 12 +5v 3 +5v 8 Keying Plug 13 +5V 4 -5v 9 RET 14 -5v 5 -12V 10 RET 15 -12v Figure 4.03 LTUPS Module Power Connections 4-25
SATURN IIE EPABX Maintenance and Trouhleshootlng J42 Pin 1 -k5v 2 RING S GND 4 -48P 5 -5v J43 Pin 1 GND 2 -488 3 +5v 4 +12v 5 -12v ’ J44 Pin 1 GND 2 +5v 3 +5v 4 GND AC (+-5Vdc) (RAC/RMV (Ground) (Ground) (-48Vdc) (+SVdc) (Ground) V) ! Figure 4.04 LTU Shelf Backplane Power Connections 4-16
I _-. SATURN IIE EPABX Maintenance and Troubleshooting 4.07 Single-Line Telephone Related Failures. Step-by-step instructions for troubleshooting the single-line telephone (SLT) (i.e., 500-or 2500-type analog instrument) are provided below: a. If the SLT is completely inoperative (i.e., no talk battery), 1. Using the SERVICE CMU Procedure, check serv- ice state of the circuit serving this SLT (a) If in-service, continue with step 2. (b) If out-of-service-craft, return the circuit to the in-service state (Table 4-10) and verify opera- tion. Continue with step 2 if the SLT remains inoperative. (c) If out-of-service - automatic, attempt to return the circuit to the in-service state (Table 4-10). (1) If circuit returns to the in-service state and the failure clears, the problem was tran- sient. If transient problems recur on the same circuit, continue with step 2. (2) If the circuit remains in the out-of-service - automatic state, continue with step 2. 2. Using the ALMDATA CMU Procedure, check the Failure History Memory for system alarm mes- sages. The corrective repair procedures for system alarm messages are provided in Table 4.02. 3. If more than one SLT fails at the same time, (a) If all affected SLTs are assigned to the same sub- scriber line module (SLMA-C, SLMA-S, or %A16 PCB) replace the subscriber line module. (b) Replace the SMXTG PCB 4. If only one SLT fails, (4 Check the line with a test set or replace the SLT with a known good SLT. If the problem disap- pears, replace the faulty SLT. UN Replace the associated subscriber line mod- ule (SLMA-0, SLMA-S, or %A16 PCB). (4 Replace the SMXTG PCB. b. If the SLT rings continuously, 1. Replace the associated subscriber line module (SLMA-0, SLMA-S, or SLAl6 PCB). c. If dial tone cannot be heard, 1. Using the SERVICE CMU Procedure, check serv- ice state of the circuit serving this SLT. (a) If in-service, continue with step 2. (b) If out-of-service - craft, return the circuit to the in-service state (Table 4-lo), and verify opera- tion. Continue with step 2 if the SLT remains inoperative. A30808-X5130-DllO-l-8920 Issue 1. May 1986 (c) If out-of-service - automatic, attempt to return the circuit to the in-service state (Table 4-10). (1) If circuit returns to the in-service state and the failure clears, the problem was tran- sient. If transient problems recur on the same circuit, continue with step 2. (2) If the circuit remains in the out-of-service - automatic state, continue with step 2. 2. Using the ALMDATA CMU Procedure, check the Failure History Memory for system alarm mes- sages. The corrective repair procedures for system alarm messages are provided in Table 4.02. 3. If dial tone cannot be heard at more than one SLT, (4 04 (cl If all affected SLTs are assigned to the same subscriber line module (SLMA-0, SLMA-S, or SLA16 PCB), replace the associated subscriber line module. Perform the Tone Generator Test (Table 4.06). If the Tone Generator Test passes but the failure still persists, replace the associated SMXTG PCB. 4. If dial tone cannot be heard on one SLT only, (a) Check line.with a test set or replace the SLT with a known g,ood SLT. If the problem disap- pears, replace the faulty SLT. (b) Replace the associated subscriber line mod- ule (SLMA-0, SLMA-S, or SLAl6) PCB. d. If dial tone is distorted or at a low level, 1. 2. If dial tone is distorted or at a low level on only one SLT, replace the SLT with a known good SLT. If dial tone is distorted or at a low level on more than one SLT. (a) (b) (cl Perform the Tone Generator Test (Table 4.06). If the Tone Generator Test passes but the failure still persists, replace the associated PSC PCB and recheck dial tone. (PSCO for Basic Cabi- net; PSCl for Expansion Cabinet, if applicable.) If failure persists, reinsert original PSC PCB and replace the MCA PCB. e. If the SLT dial pad is suspected of being faulty, per- form the DTMF Dial Pad Test (Table 4.12). f. If the SLT fails to ring, 1. Using the SERVICE CMU Procedure, check serv- ice state of the circuit serving this SLT, (a) If in-service, continue with step 2. (b) If out-of-service-craft, return the circuit to the 4-27
SATURN IIE EPABX Maintenance and Troubleshooting I ’ A30808-X5130-DllO-l-8920 Issue 1, May 1986 in-service state (Table 4-lo), and verify opera- tion. Continue with step 2 if the SLT remains inoperative. (c) If out-of-service - automatic, attempt to return the circuit to the in-service state (Table 4-10). (1) If circuit returns to the in-service state and the failure clears, the problem was tran- sient. If transient problems recur on the same circuit, continue with step 2. (2) If the circuit remains in the out-of-service - automatic state, continue with step 2. 2. Using the ALMDATA CMU Procedure, check the Failure History Memory for system alarm mes- sages. The corrective repair procedures for system alarm messages are provided in Table 4.02. 3. Perform the Station Line Test (Table 4.13) to verify ringing capability. 4. Verify that the problem is not due to the activation of a SATURN feature (e.g., Do Not Disturb, Call For- warding, etc.). 5. Replace the SLT with a known good SLT. If the problem is corrected, replace the faulty SLT. 6. Replace the associated subscriber line module (SLMA-0, SLMA-S, or SLA16) PCB. 4.08 Attendant Console Related Failures. Step-by-step in- structions for troubleshooting the attendant console are provided below: a. If the console is completely inoperative (i.e., no dial tone, no audible alerting, no functioning buttons and LED indicators), 1. Using the SERVICE CMU Procedure, check serv- ice state of the circuit serving this console. (a) If in-service, continue with step 2. (b) If out-of-service - craft, return the circuit to the in-service state (Table 4-10) and verify opera- tion. Continue with step 2 if the console re- mains inoperative. (c) If out-of-service - automatic, attempt to return the circuit to the in-service state (Table 4-10). (1) If circuit returns to the in-service state and the failure clears, the problem was tran- sient. If transient problems recur on the same circuit, continue with step 2. (2) If the circuit remains in the out-of-service - automatic state, continue with step 2. 2. Using the ALMDATA CMU Procedure, check the Failure History Memory for system alarm mes- sages. The corrective repair procedures for system alarm messages are provided in Table 4.02. 3. Verify that the line cord is properly seated in the modular jacks. One end of the line cord plugs into the rear base of the console and the other end con- nects to the modular connecting block. Also insure that the handset cord is properly seated in the handset console jacks. 4. Replace the associated PIMD PCB. 5. Replace the console with a known good console. If the problem is corrected, replace the faulty console. b. If static is heard in the handset, 1. Replace the handset. 2. Replace the handset coiled cord. 3. Replace the associated PIMD PCB. 4. Replace the console with a known good console. If the problem is corrected, replace the faulty console. c. If the console is not operating properly (i.e., nonfunc- tioning LED(s), button(s), alphanumeric display, audi- ble alerting device, etc.): 1. Perform the Attendant Console Test (refer to Table 4.14). 2. If theAttendant Console Test passes but the failure persists, (a) Replace the associated PIMD PCB. (b) Replace the console with a known good con- sole. If the problem is corrected, replace the faulty console. (c) Replace the SMXTG PCB. 4.09 Siemens Digital Telephone (SDT) Related Failures. Step-by-step instructions for troubleshooting SDTs are provid- ed below: a. If the SDT is completely dead (i.e., no dial tone, no au- dible alerting, no functioning buttons and LED indi- cators), 1. Using the SERVICE CMU Procedure, check serv- ice state of the circuit serving this SDT. (a) If in-service, continue with step 2. (b) If out-of-service - craft, return the circuit to the in-service state (Table 4-10) and verifv opera- tion. Continue with step 2 ‘if the SDT iemains inoperative. (c) If out-of-service - automatic, attempt to return the circuit to the in-service state (Table 4-10). (1) If circuit returns to the in-service state and the failure clears, the problem was tran- sient. If transient problems recur on the same circuit, continue with step 2. 4-28