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Thread: Motorola Spectra Clean Cab programming anomoly

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    Default Motorola Spectra Clean Cab programming anomoly

    SERVICE AND REPAIR NOTES
    SRN - 1326
    Sept.- 2000

    Memo To: SRN Mailing List Deadline: Dec. 31 2000
    From: Special Applications / Subscriber Product Group, Plantation, FL.
    Subject: Spectra Clean Cab Railroad Radio RSS anomaly

    Symptoms:
    Dual or Remote Control Head Spectra Clean Cab radios will intermittently fail when reading or programming with the
    RSS (RVN 4099).


    Potential Problem Radios:
    Model # MBR43KME1170AD with dual or remote control head options (MBW496, MBW654, MBW892).


    Cause:
    Loading on the serial communications bus causes a low signal level at the RIB, which in turn causes intermittent read errors to
    be perceived by the RSS.


    Corrective Action:
    For radios which experience programming problems (after the RIB & cables have been determined to be good)
    Remove 0-ohm chip resistors R3048 and R3049 on the rear panel interface board.
    Attached Files Attached Files


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