NEC Mcu 5000a Multipoint Control Unit Equipment Manual
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NECA 34 0-4 14- 500 Revision 2.0 Page 13 of 14 MCU 5000A Multipoint Control U nit INT-001 9. HANDLING OF BACKUP MEMORY B ATTE RY IN M CONT UNIT A +? CN 2 C7C8 ON As seen for A OPER ATING CONDITION 24-H OUR DISCHARGE 8 HOUR/E AC H TIME DISCHARGE
Page 14 of 14 NECA 3 40-4 14- 500 Re vis ion 2.0 INT-001 MCU 5000A Mult ipoint Con trol Unit D . Re placement of
NECA 340-414-500 Revision 2.0 Page 1 of 4 MCU 5000A Multipoint Control Unit TCP-001 CHECK ON POWER SYSTEM GENERAL: Check on AC power supply and output voltages of PWR Unit is conducted. APPARATUS: Digital Multimeter (DDM) STEP PROCEDURE REFERENCE NO. 1 Turn ON the power switch of the MCU 5000A. 2 Is POWER LED of PWR Unit lit? If YES , go to Step 10 . If NO , go to Step 3 . 3 Set Digital Multimeter (DDM) range to measure 300 VAC. 4 Turn DDM power switch to ON. 5 Connect DDM test cord between DDM and power terminal of plug of power cord. (See Fig. 1) 6 Read DDM measurement. 7 Does AC line voltage meet specified figure of 85 VAC through 132 VAC? If YES , go to Step 10 . If NO , go to Step 8 . 8 Is power cord normal? If YES , go to Step 10 . If NO , go to Step 9 . 9 Replace the power cord, then go to Step 6 . 10 Check DC output voltage of PWR unit. 11 Set the range of the Digital Multimeter (DDM) to measure 20 VDC. 12 CAUTION: BE CAREFUL OF THE POLARITY OF THE VOLTAGE CHECK TERMINALS. Connect one end of the test cord to the DDM and other end to the power terminal of PWR unit. (See Fig.2) 13 Confirm that the measured output power voltage is between +4.75 VDC and +5.25 VDC.
Page 2 of 4 NECA 340-414-500 Revision 2.0 TCP-001 MCU 5000A Multipoint Control Unit CHECK ON POWER SYSTEM Figure 1: Checking AC Line Voltage STEP PROCEDURE REFERENCE NO. 14 Does output voltage meet specified figure of +4.75 V through + 5.25 VDC? If YES, go to Step 15. If NO, go to Step 18. 15 CAUTION: BE CAREFUL OF THE POLARITY OF THE VOLTAGE CHECK TERMINAL. Connect one end of the test cord to the DDM and other end to the power terminal of PWR unit. (See Fig. 2) 16 Confirm that the measured output power voltage is between +11.4 VDC and +12.6 VDC. 17 Does output voltage meet specified figure of +11.4VDC to +12.6 VDC? If YES, go to Step 19. If NO, go to Step 18. 18 Replace the PWR unit. 19 End of procedure. POWER TERMINAL 19 990
NECA 340-414-500 Revision 2.0 Page 3 of 4 MCU 5000A Multipoint Control Unit TCP-001 CHECK ON POWER SYSTEM Figure 2: Checking DC Output Voltage of PWR Unit MON CONF B A LMT MON OFFON MEM MCU 5000A PWR 19 990 +12VDC +5 VDC G -12 VDC
Page 4 of 4 NECA 340-414-500 Revision 2.0 TCP-001 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-002 IMPLEMENTATION OF C&I LOOPBACK FUNCTION GENERAL: Operate a C&I remote loopback on specified terminals of VL 5000 using RLCS 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 .TCP-016 2 Start up the MCU console and put it into communication state.TCP-016 3 Decide the number (1 to 8) of conference room where the loop point is to be set and the kind of loop by using RLCS command. (video signal loop=V, digital signal loop=D, audio signal loop=A)COP-177 4Enter the RLCS command and above parameters of Step 3 and press the RETURN key. COP-177 5 Verify that the normal response is displayed with OK . If YES , go to Step 6 . If NO , repeat Step 4 using error code. 6 After executing the loopback, be sure to release the loop using the RLCS command. Input: RLCS parameter (number of the conference room where the loop point is set.) Loop releasing parameter=0 ¿ COP-177 7 End of procedure
Page 2 of 2 NECA 340-414-500 Revision 2.0 TCP-002 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-003 SETTING OF MCU 5000A LOOPBACK POINTS GENERAL: Set MCU loopback on specified point of MCU 5000A using STLP 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 Decide test loopback points A to H shown in Fig.1. 4 Enter the STLP command and necessary parameters for loop setting and press RETURN key.COP-178 5 Verify that the normal response is displayed with OK . If YES , go to Step 6 . If NO , repeat Step 4 using error code.COP-180 6 After the end of loop test (See TCP-004), be sure to release the loop using the RTLP command. 7 End of procedure.
Page 2 of 2 NECA 340-414-500 Revision 2.0 TCP-003 MCU 5000A Multipoint Control Unit Figure 1: MCU 5000A Loopback Point RELAY IPAF MTSC MTSC MTSCMTSC PN CHECKER PN GENERATOR POINT A POINT B POINT C POINT D POINT E POINT F1.5M LIF UNIT EC H221 MUX UNIT V SW/LSD UNIT HSCX A CODEC POINT H POINT G RELAY MTSC MTSC MTSCMTSC PN CHECKER PN GENERATOR POINT A POINT B POINT C POINT D POINT FRS-422 LIF UNIT EC H221 MUX UNIT V SW/LSD UNIT HSCX A CODEC POINT H POINT G (a) In case that MCU 5000A consists of 1.5M LIF unit and H0-INF unit (b) In case that MCU 5000A consists of RS-422 LIF unit