Rauland Mr100 Field Problems 电路图.pdf

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1、? INFORMATION FOR DISTRIBUTORS ? 3450 West Oakton Street, Skokie, IL 60076-2951 Tel: (847) 679-0900 FAX (847)679-0625 In Canada: RAULAND-BORG (CANADA) Inc. 6535 Millcreek Drive, Unit 5, Mississauga, Ontario, Canada L5N 2M2 (905) 821-2225 FAX: (905) 821-8325 TO: ALL RAULAND EDUCATIONAL DISTRIBUTORS -

2、 U.S. & CANADA SUBJECT: MR100 FIELD PROBLEMS Two potential field problems have been identified in the use of the MR100 Telemedia Controller. Item #1 - The MR100 produces a feedback tone signal to the user indicating that a connection has been made to the MR100. In some cases, this signal may be misi

3、nterpreted by the MR100 as a valid DTMF tone. When this occurs, an unintended command can be initiated (e.g. a VCR or Laser Disk Player may spontaneously stop or go into fast reverse). This problem has been resolved in units shipped from Rauland since 7/1/95. If your system is displaying similar sym

4、ptoms a modification can be made to the MR100 to correct it. The change involves the following: 1. Add a 0.33 uF capacitor (C16) directly across the DTMF receiver (U2) from ground (pin 8) to +5V (U3 pin 3) 1. Add a 1N914 diode (D23 from the bottom leg of R16 (anode) to the top of R11 (cathode). Item

5、 #2 - The most recent model of RANVCR is the Panasonic AG1300-P. In some cases, the universal remote used on the MR100 may not accept the code for the current model of RANVCR (code 162). When this occurs, the MR100 will not properly provide control of this particular model of VCR. If you are experiencing problems programming the MR100 to control this model of VCR please contact Rauland-Borg technical support for upgrade information. No: E2039tb U2 D23 R16 R11 U3 LED RESET SWITCH 8 3 .33uF 1N914 MR100 MODIFICATION RadioFans.CN 收音机爱 好者资料库