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Summary of Contents for Toa TOAEXES-5OOO
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Page 1: Intercom System
INTERCOM SYSTEM TOA EXES-5OOO INTERCOM SYSTEM TROUBLE SHOOTING GUIDE TOA ELECTRIC CO., LTD. KOBE, JAPAN... -
Page 2: Troubleshooting Guide
TROUBLE SHOOTING GUIDE Repairing of the EXES-5000 system is basically done by replacing defective units with good ones. faults in an installation can be divided into the fol- lowing categories. Faults in an exchange Faults in a station Cable faults To make system repairing easier, find which category is involved, then refer to the chart below for assistance in fault finding. - Page 3 EXES-5000 SYSTEM CHECK FLOW CHART START DIP switch on CPU correctly set ? Back-up battery on CPU connected ? Program switch on CPU off ? Power switch on Proper voltages at each output power terminal? (tabl 1) No.15 of SCN SELECT on OCU lit brighter than others ? CLOCK lamp on HCU lit...
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Page 4: Fault In Exchange
8-1. FAULT IN EXCHANGE Before power supply check, confirm the following three points to eliminate elementary faults: Is voltage selector set correctly? Is AC power supplied? Is power switch O N ? Start checking after disconnecting all wiring connected to DC output of the power supply unit. SYMPTON Exchange does not operate. -
Page 5: How To Find Short Between T-Line And R-Line
8-2. HOW TO FIND SHORT BETWEEN T-LINE AND R-LINE If the shorted condition between T-line and R-line is not corrected for a long time, it may burn out the guard re- sistor (330 , 1/2W) on the LMU board. the shorted line according to the following procedure: Turn off the privacy switch on all stations in the system. - Page 6 1. One of transmitting lines (T-Line) is disconnected. Station can make dialing. Symptom can hear can not hear Noise is heard at Noise increases at pressed at LMU Lamps Normal One of receiving lines (R-Line) is disconnected. Sympton: can make dialing without dialing tone. When heard at LMU Lamps ----- Normal...
- Page 7 T-Line and R-Line are shorted or mixed up. Symptom 3-1 A can not dial. Conversation is impossible between stations. When B dials A , noise will be heard at B immediately after the calling tone. Brighter than normal. LMU Lamps T-Line and R-Line are connected conversely.
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Page 8: Fault In Specific Station Only
8-3. FAULT IN SPECIFIC STATION ONLY Find the cause according to the following table if the fault lies with a specific station only, not with all stations. Dialing can not be made at privacy off mode. Specific key does not operate. Calling tone can not be heard. - Page 9 Same symptom Sound of the other party is broken remains even the station during call. is replaced. Immediately after Same symptom remains even the calling tone, the station the line switches to cancel, busy, is replaced. dial tone, etc. Becomes normal if the station is replaced.
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Page 10: Speech And Function Test
8-4. SPEECH AND FUNCTION TEST Speech Test After completing the wiring check and the power supply and exchange test according to the system flow chart, the speech test for each station can then take place. IMPORTANT NOTE Before testing, all programming (Secretary transfer, Master/Substation, Executive Priority Function) must be cleared from station No.200 by turning on the PRO- GRAM switch of the CPU, or the speech test can not... - Page 11 Function Test Check all employed functions with a few stations near the exchange. Check "User Programmable Functions" at stations in- volved after the programming from station 200. Secretary Transfer: Is transfer made correctly Master/Substation : Touch dial Executive Priority: Is this function operated at Use all number keys including To-Talk bar, Vol.
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- Page 14 TOA ELECTRIC CO., LTD. KOBE, JAPAN Printed in Japan EX5(7)-01R(79-2)
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