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-
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~~SH~BA SYSTEM PRACTICES ELECTRONIC KEY TELEPHONE SYSTEM FAULT FINDING SECTION 100-020-500 _ JANUARY 1984 l . XII&xx FAULT FINDING PROCEDURES
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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...
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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...
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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)...
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‘. 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...
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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...
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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-
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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...
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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.