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-014 TROUBLESHOOTING OF VIDEO RELATED FAILURE GENERAL: When the video signal is not output, troubleshooting is performed through the use of line from each conference room. APPARATUS: None STEP PROCEDURE REFERENCE NO. 1 Is the CONF A LED (CONF B LED) of the V SW/LSD IF unit lit? If YES , go to Step 3 . If NO , go to Step 2 .GSD-005 2 Turn the toggle switch on the V SW/LSD IF unit to CONF A (CONF B). Then, verify that CONF A LED (CONF B LED) lights.GSD-005 3 Are JOIN CH1 to CH8 LEDs (participating conference room) lit? If YES , go to Step 5 . If NO , go to Step 4 .GSD-005 4 Perform the power-up and setup of the VL 5000 at each participating conference room. Then, verify that JOIN CH1 to CH8 LED lights. 5 Are broadcast sending station LEDs (TX 1 to 8) lit? If YES , go to Step 7 . If NO , go to Step 6 . 6 Request the system operator to speak loudly. If the TX ( ) LED lights up, the operation is normal. If not, the V SW/LSD IF unit is faulty. Replace it.TCP-017 7 End of procedure.
Page 2 of 2 NECA 340-414-500 Revision 2.0 TCP-014 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-015 TROUBLESHOOTING OF AUDIO SYSTEM GENERAL: Troubleshooting of the audio system is performed through the use of line from each conference room. APPARATUS: Level Meter or Speaker with amplifier STEP PROCEDURE REFERENCE NO. 1 Start up the whole system. 2 Request each conference room to speak loudly for a test. 3 Are the appropriate LEDs (RC 1 to 4) of the A CODEC unit lit? If YES , go to Step 4 . If NO , replace the A CODEC unit. Then, go to Step 5 .TCP-017 4 Perform the troubleshooting of the A SUM unit. Connect a level meter or speaker with amplifier to the monitor terminal on the front panel of a A SUM unit and monitor.TCP-013 5 Is the signal monitored? If YES , go to Step 6 . If NO , go to Step 7 . 6 The A CODEC unit is faulty. Replace it. Then, go to Step 8 .TCP-017 7 The A SUM unit is faulty. Replace it.TCP-017 8 End of procedure.
Page 2 of 2 NECA 340-414-500 Revision 2.0 TCP-015 MCU 5000A Multipoint Control Unit This page is for your notes.
NECA 340-414-500 Revision 2.0 Page 1 of 4 MCU 5000A Multipoint Control Unit TCP-016 START-UP OF MCU CONSOLE GENERAL: This procedure provides instruction for turn-up of MCU. APPARATUS: None STEP PROCEDURE REFERENCE NO. Note: MCU console is required the specifications as following. A. Physical Interface • RS-232 interface port (serial interface port) of both the MCU 5000A and the MCU console are equipped with the D-sub 25-pin connector con- forming to EIA RS-232C. • Up to 3 consoles can be connected to the MCU 5000A using CH1 to CH3 terminals. B. Electrical Interface • The pin assignments of the connector are given in the following table. • Pin Assignments for RS-232C Port Connector The reverse (twisted) cable is used to connect the MCU console with the MCU 5000A, as both of them are DTE (Data Terminal Equipment). The straight cable is used to connect DCE (Data Communication Equipment) such as the modem. C. Reverse Cable Connection The communication condition for the RS-232C Port is set as follows: • Synchronous mode: Start-stop mode • Baud rate: 9600 bps • Character bit length: 8 bits • Stop bit length: 1 bit • Parity check: none • X control: none
Page 2 of 4 NECA 340-414-500 Revision 2.0 TCP-016 MCU 5000A Multipoint Control Unit START-UP OF MCU CONSOLE STEP PROCEDURE REFERENCE NO. 1 Connect reversed cable between RS-232C terminal at rear side of MCU 5000A and RS-232C terminal of MCU console by using RS-232C cable. (See Fig. 2) 2 Set MCU console as below. • Synchronous mode: Start Stop mode • Baud rate: 9600 bps • Character bit length: 8 bit • Stop bit length: 1 bit • Parity Check: none • X control: none 3 Turn on power switch of MCU console. 4 Turn on power switch of MCU 5000A. 5 Is the opening message displayed? (See Fig. 1) If YES, go to Step 8. If NO, go to Step 6. 6 Turn OFF power switch of MCU console and MCU 5000A. 7 Check the connection of cable. 8 Using the RCLK command, check if the console connection is correct or not. RCLK ¿ 9 Verify that the correct date and time are displayed on the screen. If correct, go to Step 11. If not correct, go to Step 10. 10 To change the date and time setting, enter as follows using the WCLK command. WCLK yyyy - mm - dd hh : ff : ss ¿ yyyy: year (4 digits) mm: month (2 digits) dd: day (2 digits) hh: hour (2 digits) ff: minute (2 digits) ss: second (2 digits) 11 End of procedure.
NECA 340-414-500 Revision 2.0 Page 3 of 4 MCU 5000A Multipoint Control Unit TCP-016 START-UP OF MCU CONSOLE Figure 1: Connection of MCU Console to MCU 5000A Figure 2: Opening Message MCU REAR TERMINAL ARRANGEMENT RS-232C AC IN CH1CH5 CH1 CH13 CH9 CH5CH1 CH2CH6 CH2 CH14 CH10 CH6CH2 CH7 CH3 CH3 CH15 CH11 CH7 CH3 CH4 CH8 CH4 CH16 CH12 CH8 CH4 RS-232CHSD IFL IF RS-232C MCU CONSOLE (REVERSE) PORT Note 1: The channel 4 (CH4) at RS-232C interface port does not support RS-232C interface.Note 2: The HSD IN ports are for future use. *** Multi point Teleconference control unit MCU 5000A Ver x.xx *** *** Copyright (C) NEC Corporation 1991, 1993 ***
Page 4 of 4 NECA 340-414-500 Revision 2.0 TCP-016 MCU 5000A Multipoint Control Unit This page is for your notes.
NECA 340-414-500 Revision 2.0 Page 1 of 4 MCU 5000A Multipoint Control Unit TCP-017 REPLACEMENT OF UNIT GENERAL: This procedure describes the step of unit replacement. APPARATUS: None Figure 1: Open Front Cover Ta b l e 1 : STEP PROCEDURE REFERENCE NO. 1 Turn OFF the power switch of the MCU 5000A. 2 If front cover is already open, go to Step 4.INP-003 3WARNING: FRONT COVER SHOULD BE LOWERED (180 o) WITH BOTH HANDS ALLOWING COVER TO DROP FREELY MAY DAMAGE COVER OR EQUIPMENT BELOW.
Page 2 of 4 NECA 340-414-500 Revision 2.0 TCP-017 MCU 5000A Multipoint Control Unit REPLACEMENT OF UNIT Figure 2: Remove Unit STEP PROCEDURE REFERENCE NO. 4 Using index fingers, slide the locking knob to inside of the front cover. WARNING: 1. TO PREVENT DAMAGE TO THE ELECTROSTATICS SENSITIVE DEVICE USED IN THE MCU 5000A, ALWAYS WEAR A WRIST STRAP WHEN REPLACING A UNIT. 2. ATTACH THE 2224 ADJUSTABLE WRIST STRAP OR EQUIVALENT TO THE WRIST AND CONNECT TO THE ESD CONNECTOR ON THE MCU 5000A. 5 Check to see the unit to be pulled out. The unit abbreviation marked on the inside of front cover shows the mounting position. 6 Pull down on the bottom ejector and push up on the top ejector. 7 Hold the top and bottom edges of the unit and gently slide the unit out of MCU 5000A.