Toshiba Strata Xii, Strata Xx General Description Manual
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OPERATING PROCEDURES SECTION 100-020-400 JANUARY 1984 05.00.3 The active pattern is shown by the state of the NT LED as follows: Three-pattern Two-pattern DAY OFF OFF DAY 2 FLASH N/A NITE ON ON -14-
~~SH~BA SYSTEM PRACTICES ELECTRONIC KEY TELEPHONE SYSTEM FAULT FINDING SECTION 100-020-500 _ JANUARY 1984 l . XII&xx FAULT FINDING PROCEDURES
FAULT FINDING SECTION 100-020-500 JANUARY 1984 FAULT FINDING PROCEDURES TABLE OF CONTENTS PARAGRAPH SUBJECT PAGE TABLE of CONTENTS. ........................................... i 01 GENERAL ..................................................... 1 02 FAULT CLASSIFICATION ........................................ 1 03 FAULT CLEARING PROCEDURES ................................. 1 04 DEFECTIVE APPARATUS RETURNS ............................... 1 05 FAULT IDENTIFICATION AND ELIMINATION PROCEDURES .......... 2 TABLE A-STATION CABLE CONTINUITY CHECK USING VOLTMETE’R . . -3 TABLE B-STATION CABLE CONTINUITY CHECK USING OHivit I tK .... 3 TABLE C-STRATA XII & XX POWER DISTRIBUTION ................. 4 TABLE D-STRATA XII & XX CROSSPOINT MATRIX LOCATION., ...... 6 TABLE-CRDU POSITIONS ........................................ 6 FLOW CHARTS CHART NO. l-FAULT CLASSIFICATION ........................ 7 CHART NO. 2-POWER FAULTS ................................ 9 CHART NO. 3-STATION FAULTS. .............................. 11 CHART NO. 4-MKSU FAULTS ................................. 13 CHART NO. 5-CO LINE FAULTS. .............................. 14 pm,-, D-t- h,n fi_I,,I-,-Earn\,, F&l 11 TC brnf-%rl I I”“. U-II” I Lll”“l”l . ..“L.“. ............................ 17 CHART NO. 7-DSS FAULTS ................................... 19 CHART NO. 8-AUTOMATIC DIALING FAULTS., ................. 21 CHART NO. 9-MOH, BGM, PAGE & RELAY SERVICE FAULTS ...... 23 CHART NO. lo-SMDR FAULTS ................................ 25 CHART NO. ll-OPX FAULTS .................................. 26 CHART NO. 12-OPL FAULTS. ................................. 28 . . . . .a-_ I-.-,-m* , 1-w ILLUS I HAI IUIV LIS I FIGURE TITLE PAGE 1 FLOW CHART SYMBOLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 SIMPLIFIED MPRU SCHEMATIC.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 _i_
01 GENERAL 01.01 This section describes the maintenance procedures used for the diagnosis of faults in the STRATA XII & XX electronic key telephone systems. Faults are classified and then cleared by replacing apparatus and performing operational tests in the sequences prescribed by the fault clearing flow charts in Paragraph 05. 02 FAULT CLASSIFICATION 02.01 A fault classification flow chart is pro- vided to ensure that fault clearing is pursued in a logical sequence (Chart No. 1). 02.02 In the flow charts an assumption is made that the fault was discovered and reported by a station user. All faults, therefore, are classified according to the way they would appear at the station. 02.03 Faults and associated flow charts are organized into the following categories: Flow Chart 1 2 3 4 5 6 7 8 9 10 11 12 Title Fault Classification Power Faults Station Faults MKSU Faults CO Line Faults Intercom Faults DSS Faults Automatic Dialing Faults MOH, BGM, Page, Relay Service Faults SMDR Faults OPX Faults OPL Faults 03 FAULT CLEARING PROCEDURES 03.01 Before attempting to clear any fault, ensure that it is in the STRATA system and not caused by associated external equipment such as wiring, MOH source, etc. IMPORTANT Many features of the STRATA XII & XX systems are assigned, enabled or disabled using software en tries as described in Set tion 100~020-300, System Programming. Further, with the exception of Programs SXX-9Xx, progratnmingmchanges areno t effective until the hew data has been shifted into working FAULT FINDING SECTION 100-020-500 JANUARY 1984 memory (see Paragraph 02.06 of Section 100-020-300, System Programming). it is important to verify that the s ys tern program- ming is correct and functionalbefore trouble- shooting the hardware. 03.02 In new systems, or ‘when the MCAUI AMMU or CRDU has been changed, the initialize procedure must be performei before testing. The system data stored on the original MCAU/AMMU or CRDU will be protected from loss by the battery on that PCB. Therefore, the initialize sequence should not be performed if the original PCB is reinstalled. 03.03 Faults in the STRATA systems are cleared by replacing PCBs, EKTs or the power supply, as instructed in the flow charts. 03.04 Five symbols are used in the flow charts. These symbols are identified in Figure 1. 03.05 The flow charts are sequentially arranged to permit rapid fault localization within the STRATA Xl I & XX systems. All f&t c/eking must begin with the Fault Classification Flow Chart, which is arranged in the correct fault locating sequence. 03.06 The following precautions must be observed when handling PCBs. DO NOT: Drop a PCB Stack one PCB on top of another Handle a PCB without discharging any static electricity from your person by touching the grounded MKSU Touch PCB contacts with your fingers IMPORTANT If the fault is not cleared by substituting a PCB, the original PCB must be ins talled in the MKSU BEFORE trying another PCB. 04 DEFECTIVE APPARATUS RETURNS 04.01 When defective STRATA apparatus is shipped for repair, the apparatus must be packed in a suitable container (an original type box is highly recommended). -l-
FAULT FINDING SEaION 100-020-500 JANUARY 1984 START AND END OF A FLOW CHART SEQUENCE IMPORTANT NOTES AFFECTING THE FAULT CLEARING PROCEDURE QUESTION TO BE ANSWERED YES OR NO PROGRESSION TO OR FROM ANOTHER FLOW CHART LOCATION. LETTER WILL DENOTE EXACT ENTRANCE OR EXIT POINT STATEMENT OF A REQUIRED ACTION I 0 0 TO/FROM SPECIFIC FLOW CHART (FC) FIGURE 1 -FLOW CHART SYMBOLS a) Paper container for the MCAU/AMMU, MSMU AND CRDU PCBs. b) Anti-static container for all other PCBs. c) Plastic bags for EKTs, MKSUs, etc. 04.02 NEVER WRITE ON THE APPARATUS ITSELF! Describe the nature of the defect on an information tag, and attach the tag to the front of the unit with string (not wire) so that the tag can remain attached during the testing and repair process. 04.03 If different and/or additional faults are created in the system by substituting a PCB, tag and return the substitute PCB as a defective unit. 05 FAULT IDENTIFICATION AND ELIMINATION PROCEDURES 05.01 The MCAU/AMMU PCB may contain a “soft” fault due to static electricity. If the MCAU/ AMMU is found defective during the fault finding procedures, attempt to clear a soft fault prior to returning the PCB for repair. The correct procedure for this is to reinstall the MCAU/AMMU, perform the initialization pro- cedure and then reprogram the system as necessary to test for the fault. If the fault returns after reinstalling and performing the initialization i procedure, tag the defective MCAUIAMMU and return for repair. .* . -2-
‘. FAULT FINDING SECTION 100-020-500 JANUARY 1984 NOTE: : .. 1. 2. The CRDU PCB is not considered sep- arately from its host PCBs in any flow chart except the Automatic Dialing Fault flow chart. If a CRDU is equipped, remove the CRDU when substituting a host PCB (MCBU or MDSU) and reinsert the same host PCB into the MKSU. If the fault is cleared, replace the defective CRDU. TABLE A STATION CABLE CONTINUITY CHECK USING VOLTMETER NOTE: Perform the following at the locations in- dica ted: 1. Modular block: Check all station cables. 2. MDF: Check cable from MSTU to MDF. 1) Disconnect the EKT. 2) Using a DC voltmeter, measure between the wires of the two pairs to verify the presence of the following readings: 3) An improper reading indicates an open, crossed The green-red and black-yellow measure- or shorted wire. ments should be within 10% of each other. 4) For the MDF-to-EKT cable, a more precise check is-made using an ohmeter per Table B. *Nominal voltage-within the power supply limits of 23.22,28.2 VDC while under ACpower. TABLE B ’ STATION CABLE CONTINUIITY CHECK USING 1) 2) 3) 4) 5) OHMETER * Disconnect the EKT at the wall. At the MDF, remove the bridging clips. Using an ohmeter, measure the resistance between all combinations of the four wires at the modular block. All measurements should exceed 1 MOhm. At the MDF, place shorting jumper wires between the T and R of pair #1 (green-red) and the T and R of pair #+2 (black-yellow). At the modular block, measure the resistance between all wire combinations. The proper readings are as follows: “NOTE: -3-
FAULT FINDING SECTION 100-020-500 JANUARY 1984 Input +24V From EPSA 104 TABLE C STRATA XII & XX POWER DISTRIBUTION ’ r Bower Switch I ,nter. Breaker SW1 MPRU Fl (24Vnl) (24L2, list. Breaker Voltage (Et&2) 24V#l IEKFT5#33) 24V#l (EKFT694) 24V#l 24V#2 (MZ”, +12 VI 1 +5 PCB Served F&l-” #l (SXII) #l, 2 (SXX) MSTU #2 (SXII) #3,4 (SXX) MSTU #3 (SXII) #5,6 LSXX) MSTU #4 (SXll) #7 (SXX) MCOU MDSU MINU MSMU MCOU MXPU MOPU MSTU MCAU MSMU MCBU MDSU MINU MINU MXPU MSTU MCOU MSTU MOPU MSMU MCAU MCBU MDSU MINU -4-
FAULT FINDING SECTION 100-020-500 JANUARY 1984 TBl SW1 +24V __c.. ON/OFF EKT #3 (F6) _i-,2.OA EKT #4 y&z KSU SPSA 104 - 1 1AB. 2AB . . 3 3Ab. 4AB 7 7AB. 8AB 1 38AB, 39AB 2 36AB. 37AB 3 34AB: 35AB 32AB. 33A8 9AB. 1OAB 16AB. 17AE 6 _L 15AE I-- -/- + 23AB. 24AE 12AB 13AB 14AB 5 1 26AB 27AB 28AB I +24V #I 1 24V #l GRD +24V $2 24V #2 GRD +12v Vl 12V GRD +5v 5V GRN FIGURE 2 -SIMPLIFIED MPRU SCHEMATIC -5-
FAULT FINDING SECTION 100-020-500 JANUARY 1984 TABLE D STRATA XII & XX CROSSPOINT MATRIX LOCATION STRATA Xii & XX STRATA XX PRIMARY MATRIX* EXPANSION I lOwI MSTU #l MXPU #l MXPU #2 18~25 MSTU #2 26~33 ! MSTU *3 MXPU #2 (SXII) MSTU #4 MXPU #3 (SXX) MXPU #4 34pv41 42%49 MSTU #5 MXPU ~$5 MXPU #6 50-57 MSTU #6 58~65 MSTU +7 MXPU #7 MXPU #8 “IMPORTANT.. In its power-up sequence, the STRATA software verifies that the primary matrix (MXPU) exists for each MSTU. if an MSTU is installed without an accompanying MXPU, a// ste-. tions in the system will be inoperative until the mismatch is corrected and the power switch is cycled OFF and ON. TABLE E - CRDU POSITIONS NOTE: The quantity of Automatic Dialing numbers (STRATA XII & XX) provided the system and stations by the available options are listed in this table. A CRDU is equipped on each PCB mentioned and the respective address codes are indicated in parenthesis. *Stations 10~41 for STRATA XII. -6-
To To To CHART NO. 1 FAULT CLASSIFICATION Please read the maintenance information before proceeding. i START FAULT FINDING SECTION 100-020-500 - JANUARY 1984 l I Start here to clear faults I in the STRATA system. Check fuses, circuit breakers and power indxators. To indicators, fuses NO NO access intercom or at least one NOTE: Verify MXPU locations per Table D.