Toshiba Perception 1 2 User Manual
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FAULT FINDING SECTION 200-255-500 MARCH 1991 CHART NO. 20 RlNGlNGlRlNGBACK TONE FAULTS Fault Classification Go to Page 4 to classify fault. To faulty at electronic/digital NO J Replace any faulty standard telephone(s). Replace the NSTU replaced SlT/2500- Measure the ringer voltage at the backplane (between pins 26 & 26). Tag the defective unit(s) and return creareo? / for repair. I ( END ) Call the Service Center for assistance. -38-
FAULT FINDING SECTION 200-255-500 MARCH 1991 CHART NO. 20 RINGING/RINGBACK TONE FAULTS (continued) From s2 Pages 14,38 I-;’ Remove all NSTUs and the NPRU. - Reinstall all PCBs, one at a time. . Note any failure (ringer voltage out of spec) and replace the suspected PCB. PCB also cause 1 Call the Service Tag the defective L -39-
FAULT FINDING SECTION 200-255-500 MARCH 1991 CHART NO. 21 MISCELLANEOUS FAULTS From From I Ha? more tl one unit been one unit
FAULT FINDING SECTION 200-255-500 MARCH 1991 CHART NO. 22 NMDWNDCU FAULTS From n here from the Fault Classification Either leave the circuit(s) disabled or enable them as required. -41-
FAULT FINDING SECTION 200-255-500 MARCH 1991 CHART NO. 22 NMDUINDCU FAULTS (continued) NOTES: 7. Verify that T & R are not reversed. 2. This question also refers to combined electronic telephone/DDIUs. I YES NOTE: If any NMDU/ I.““” *, AfnP’ ’ -ircuit(s) is/are still disal 5ted, the fault -t indicates : something ,, besides / disabled state. ‘ ‘ ‘ Using the TPER Program, disable and then enable the corresponding faulty circuits. . I ‘ ‘. . ‘ ‘. A Replace the NMDU/ NDCU PCB with the FALT LED & indication. Tag the defective unit and return for repair. i END -YES -42-
FAULT FINDING SECTION 200-255-500 MARCH 1991 CHART NO. 23 DATA COMMUNICATION STATION FAULTS / Did I I Y 1 NO Concentrate on on stations assigned to the same PC6 NOTE: Consult ‘ES NO . Verify that the DTR control signal is active (Sep DIU = Terminal Ready LED on). . Verify the station’s W-232 cable. - Verify that the DIU DTUModem and Mode switches are correctly set. . Verify that the computer/ terminal works properly. . Verify that the Baud rate and data format are compatible. - Correct if faulty. To Jl 0 Page 48 Tag the defective unit(s) and return 23 END -43-
FAULT FINDING SECTION 200-255-500 MARCH 1991 CHART NO. 23 DATA COMMUNICATION STATION FAULTS (continued) From From 4 NO TO - I 1 - Verify that the DTR contrc signal is active. (Sep DIU = Terminal Ready on.) - Verify the station’s RS- 232 Cable. - Verify that the computers/ terminals work properly. - Verify that the Baud rates and data formats are compatible. - Verify that the Mode Switch and the DTE/ Modem switch are set correctly (DDIU- MAT and DDIU-MA) . Correct if faulty. 1 EAFLFy cleared? appropriate station (NDCWNDKU) PCS ci END -44-
FAULT FINDING SECTION 200-255-500 MARCH 1991 CHART NO. 24 DATA COMMUNICATION TRUNK FAULTS Go to Page 4 to classify fault. To - Verify that the computer/terminal Baud rate and data format are compatible with the distant end. . If synch data is used, verify that the DIU mode switch is set correctly. . Correct if incompatible. -----_--___ p To Tag the defective unit and return for repair.
FAULT FINDING SECTION 200-255-500 MARCH 1991 CHART NO. 24 DATA COMMUNICATION TRUNK FAULTS (continued) Page 45 v I Using the TPER Program, disable all NMDU PCBs, except the one at the lowest PCB location number. Concentrate on clearing faults related to one NMDU PC0 location. than one NMDU Using the TPER Program, disable all NMDU PCBs except the next one that is numerically higher than 7 the NMDU last verified as free from faults. I ,’ I YES - a’ ‘ 8’ ‘ ‘* wr To@ the NMDU PCB that is still enabled. -46-
FAULT FINDING SECTION 200-255-500 MARCH 1991 ( i CHART NO. 24 DATA COMMUNICATION TRUNK FAULTS (continued) no other call intetferes on this port during tests. . Verify that the Baud rate and data format are compatible to the distant end. . Verify that the DTE/ MODEM switch is set to MODEM. . If synch data is used, verify that the DIU mode switch is set correctly. . Verify that the modem is compatible. . Verify that the DIU and modem cables are properly connected. (See section ZOO-25C 200. Installation.) . Verify that the DIU and modem power is on. . Correct if faultv. From Tl Page 46 -2 Using the TPER Program, disable all ports (except the lowest used port no.) of the respective (enabled) NMDU PCB i YES Enable the next Disable the port that was last verified to be free of faults. r This NMDU PCB (with related circuits) is free of faults. Correct similar faults on other NMDU port(s). Is NO 1 -%?:::? .- the fault cleared? / I 11115 purL (“wry compatibility.) I Re-enable all disabled NMDU PCBslports. Tag the defective unit and return for repair. YES c+ END -47-