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Table of contents for the manual
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Page 1
T O A EXES-5OOO I N T E R C O M SYSTEM TROUBLE SHOOTING GUIDE T O A ELECTRIC CO . , LTD. KOBE, JAPAN INTERCOM SYSTEM[...]
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8 . TROUBLE SHOOTING GUIDE Repairing of th e EXES-5000 s ys te m is basically done b y replacing defective units with go od ones. Th e system's faults i n an installation can be divided i nt o t h e f o l - lowing categories. 1 . Faults i n a n exchange 2 . Faults in a station 3 . Cable faults T o m a ke system repairing easier, find which cat[...]
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EXES-5000 SYSTEM CHECK FLOW CHART START D IP switch on CPU correctly set ? Back-up battery o n C P U connected ? Program switch on CPU off ? Power switch on Proper voltages at each output power terminal? (tabl 1 ) No.15 o f SCN SELECT on OC U l i t brighter than others ? CLOCK lamp on HCU l it brightly ? Other lamps on HC U of f ? Station No . lamp[...]
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8-1. FAULT I N EXCHANGE Before power supply check, confirm the following three points t o eliminate elementary faults: 1 . I s voltage selector set correctly? 2 . I s AC power supplied? 3 . I s power switch O N ? Start checking after disconnecting al l wiring connected t o DC output o f th e power supply unit. SYMPTON CHECK-ITEM Over-current flows [...]
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8-2. HO W T O FIND SHORT BETWEEN T-LINE A N D R-LINE I f th e shorted condition between T-line a n d R-line is n o t corrected fo r a long time, it ma y burn out t h e guard r e - sistor (330 , 1/2W) o n th e L M U board. Therefore, find t h e shorted line according t o t h e following procedure: 1 . Turn off t he privacy switch on all stations in [...]
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1 . One of transmitting lines (T-Line) i s disconnected. Sympton: 2 - 1 A c a n make dialing w i t hout dialing tone. 2 - 2 When B dials A , busy tone or dial tone will b e heard a t B immediately after th e calling tone. LMU Lamps ----- Normal Station EXCHANGE EXCHANGE Symptom 1-1 1-2 1-3 1-4 1-5 A ca n make dialing. A c an hear B . B c a n no t h[...]
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3 . T-Line a n d R-Line a r e shorted or mixed u p. Symptom 3-1 3-2 3-3 A ca n n o t dial. Conversation i s impossible between stations. When B dials A , noise will b e heard at B immediately after the calling tone. L M U Lamps Brighter than normal. 4 . T-Line a n d R-Line a r e connected conversely. Sympton: 4-1 4-2 4-3 A can n o t make dialing. C[...]
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8-3. FAULT I N S P ECIFIC STATION ONLY Find th e cause according t o th e following ta bl e if th e fault lies with a specific station only, no t with all stations. CHECK-ITEM Dialing can n o t b e made a t privacy o ff mode. LMU Lamp i s off. Specific Lamp on LMU is brighter than normal. LM U Lamp i s on i n normal. Specific key does n o t operate[...]
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Sound of th e other party i s broken during call. Same symptom remains even t he station i s replaced. Immediately after the calling tone, th e line switches to cancel, busy, dial tone, etc. Same symptom remains even t h e station i s replaced. Becomes normal i f t h e station i s replaced. Adjust t h e volume control of station speaker i f t h e r[...]
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8-4. SPEECH A N D FUNCTION TEST 1 . Speech Test After completing t h e wiring check an d th e power supply and exchange test according t o t h e system flow chart, th e speech test f o r each station c an then take place. IMPORTANT NOTE Before testing, a ll programming (Secretary transfer, Master/Substation, Executive Priority Function) must be cle[...]
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2 . Function Test Check al l employed funct ions with a f ew stations near t h e exchange. Check "User Programmable Functions" at stations in - volved after t h e programming from station 200. Secretary Transfer: I s transfer made correctly with the privacy s w itch o n at t h e executive station. at substation Master/Substation : Touch d[...]
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MEMO[...]
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MEMO[...]
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TOA ELECTRIC CO., LTD. KOBE, J APAN Printed i n J apan EX5(7)-01R(79-2)[...]