NEC Mcu 5000a Multipoint Control Unit Equipment Manual
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NECA 340-414-500 Revision 2.0 Page 1 of 2 MCU 5000A Multipoint Control Unit TCP-004 EXECUTION OF MCU 5000A LOOP TEST GENERAL: Perform a MCU 5000A loopback test at an arbitrary loop point using TLOP command, referring to NECA 340-414-300 . APPARATUS: MCU console STEP PROCEDURE REFERENCE NO. 1 Has the MCU console been started up? If YES , go to Step 3 . If NO , go to Step 2 . 2 Start the MCU console up and put it into communication state.TCP-016 3 Before the execution of loop test, the loopback point must be set beforehand by the STLP command.TCP-003 4 Decide the kind of loop test.COP-179 5 Enter the TLOP command and parameters for the selected kind of loop test and press the RETURN key.COP-179 6 Verify that the normal response is displayed with OK . If YES , go to Step 6 . If NO , repeat Step 5 using error code. 7 End of procedure.
Page 2 of 2 NECA 340-414-500 Revision 2.0 TCP-004 MCU 5000A Multipoint Control Unit This page is for your notes.
NECA 340-414-500 Revision 2.0 Page 1 of 2 MCU 5000A Multipoint Control Unit TCP-005 TROUBLESHOOTING OF M CONT UNIT GENERAL: Sectionalization of the failure is performed by the front lamp (LED) indication of M CONT unit. APPARATUS: None STEP PROCEDURE REFERENCE NO. Note: Location of SWs, Straps, LEDs, and list of LED function are shown in GSD-009 . 1 Verify the LED condition. If ST1 to ST6 are indicated steadily, go to Step 2 . If ST7 is lit, go to Step 3 . If ST8 is lit, go to Step 4 . 2 When ST1 to ST6 indicate steadily. Some LEDs are blinking to give HEX indication of the number of the task under execution by the CPU when operating normally. However, when an abnormality has occurred, LEDs stop blinking indicating the number of the task where the abnormality has occurred. Act according to Ta b l e 1 in INT-001 . 3 When ST7 is lit. ST7 lights when an abnormality of the program occurs. Act according to Ta b l e 1 in INT-001 . 4 When ST8 is lit. Is the memory card mounted? If YES , go to Step 6 . If NO , go to Step 5 . 5 Mount the memory card and push the reset switch. 6 Verify the indication of ST8. If still lit, go to Step 7 . If went off, go to Step 8 .
Page 2 of 2 NECA 340-414-500 Revision 2.0 TCP-005 MCU 5000A Multipoint Control Unit TROUBLESHOOTING OF M CONT UNIT STEP PROCEDURE REFERENCE NO. 7 Verify the state of Memory Card using RMCS command. If response is displayed with LOW BATTERY VOLTAGE , replace the battery with a new one. If response is displayed with ERR81 , replace the Memory Card with a new one.TCP-019 8 End of procedure.
NECA 340-414-500 Revision 2.0 Page 1 of 2 MCU 5000A Multipoint Control Unit TCP-006 TROUBLESHOOTING OF 1.5M LIF UNIT GENERAL: Sectionalization of the failure is performed by the LED indication of 1.5M LIF unit. APPARATUS: MCU console STEP PROCEDURE REFERENCE NO. Note 1: Mounting positions of LEDs and SW and the list of LED functions are shown in GSD-001 . Note 2: When the LED of the CH (channel) in use is lit, there is a failure in the line. However, LEDs in the unused channels are always lit. The channel where the LED is lit, is sectionalized by entering the command from the MCU console as described in the following. 1 Start up the MCU console.TCP-016 2 Set No. 8 element of the SW3 on the M CONT unit to ON (CLOSE). It is not necessary to turn the power OFF . 3 Set the remote (line) side loopback at point C from the console and execute. If the video and audio signals of local station return at each point, go to Step 4 . If they do not return, go to Step 6 .TCP-003/TCP-004 TCP-017 4 Set the local (MCU 5000A) side loopback at point F from the console and execute. If the LED of the CH that signal is loopback at the 1.5M LIF unit goes out, the 1.5M LIF unit operates normally. If it does not go out, the 1.5M LIF unit is faulty. Replace it. Then, go to Step 7 .TCP-003/TCP-004 5 Failure has occurred in the M CONT unit, perform troubleshooting. Then, go to Step 7 .TCP-005 6 The line is faulty, perform troubleshooting. 7 After the end of failure sectionalization, return No. 8 element of the SW3 on the M CONT unit to OFF (OPEN). Press the RESET SWITCH and RESTART . 8 End of procedure.
Page 2 of 2 NECA 340-414-500 Revision 2.0 TCP-006 MCU 5000A Multipoint Control Unit This page is for your notes.
NECA 340-414-500 Revision 2.0 Page 1 of 2 MCU 5000A Multipoint Control Unit TCP-007 TROUBLESHOOTING OF RS-422 LIF UNIT GENERAL: Sectionalization of the failure is performed by the front lamp (LED) indication of RS-422 LIF unit. APPARATUS: MCU console STEP PROCEDURE REFERENCE NO. Note 1: Location of SWs, Straps, LEDs, and list of LED function are shown in GSD-002 . Note 2:In the case where the LED of the CH (channel) in use is lit, there is a failure in the line. However, LEDs in the unused channels are always lit. The channel where the LED is lit is sectionalized by the command from the console as described in the following: 1 Start up the console. 2 Set No. 8 element of the switch pack SW3 on the M CONT unit to ON (CLOSE). It is not necessary to turn the power OFF . 3 Set the remote (line) side loopback at point F from the console and execute. If the video and audio signals of local station return at each point, go to Step 4 . If they do not return, go to Step 5 .TCP-003/TCP-004 TCP-017 4 Failure has occurred in the M CONT unit, perform troubleshooting. Then, go to Step 6 .TCP-005 5 The line is faulty, perform troubleshooting. 6 After the end of failure sectionalization, return No.8 element of the SW3 on the M CONT unit to OFF (OPEN). Press the RESET SWITCH and RESTART . 7 End of procedure.
Page 2 of 2 NECA 340-414-500 Revision 2.0 TCP-007 MCU 5000A Multipoint Control Unit This page is for your notes.
NECA 340-414-500 Revision 2.0 Page 1 of 2 MCU 5000A Multipoint Control Unit TCP-008 TROUBLESHOOTING OF H0-INF LIF UNIT GENERAL: Sectionalization of the failure is conducted by the front lamp (LED) indication of H0-INF LIF unit. APPARATUS: MCU console STEP PROCEDURE REFERENCE NO. Note 1: Location of SWs, Straps, LEDs, and list of LED function are shown in GSD-003 . Note 2: In the case where the LED of the CH (channel) in use is lit, there is a failure in the line. However, LEDs in the unused channels are always lit. The channel where the LED is lit is sectionalized by the command from the console as described in the following: 1 Start up the console. 2 Set No. 8 element of the switch pack SW3 on the M CONT unit to ON (CLOSE). It is not necessary to turn the power OFF . 3 Set the remote (line) side loopback at point C from the console and execute. If the video and audio signals of local station return at each point, go to Step 4 . If they do not return, go to Step 6 .TCP-003/ TCP-004 4 Set the local (MCU 5000A) side loopback at point F from the console and execute. If the LED of the CH that signal is looped back at the H0-INF LIF unit goes out, the H0-INF LIF unit operates normally. If it does not go out, the H0-INF LIF unit is faulty. Replace it.TCP-003/ TCP-004 TCP-017 5 Failure has occurred in the M CONT unit, perform troubleshooting. Then, go to Step 7 .TCP-005 6 The line is faulty, perform troubleshooting. 7 After the end of failure sectionalization, return No.8 element of the SW3 on the M CONT unit to OFF (OPEN). Press the RESET SWITCH and RESTART . 8 End of procedure.
Page 2 of 2 NECA 340-414-500 Revision 2.0 TCP-008 MCU 5000A Multipoint Control Unit This page is for your notes.