Perfecta 76UC

Discussion in 'Cutters and Trimmers' started by andy martin, Mar 11, 2021.

  1. andy martin

    andy martin Member

    Joined:
    Aug 2016
    Messages:
    96
    Location:
    bradford po
    Hi
    Perfecta 76UC. Intermittent ERROR33, manual says fault on SMS safety module replace. Any one had this problem. It will be very expensive to replace whole module
    Cheers
    Andy
     
  2. CHOCK

    CHOCK Senior Member

    Joined:
    Dec 2016
    Messages:
    2,852
    Location:
    Managua,Nicaragua
    Hi sir;
    The safety module consists of:

    - a motherboard,
    - 2 CPU boards,
    - a comparator board.

    2) Before to replace do this;

    1) Perform a visual inspection : look for loose and broken wires, improperly seated connectors, loose or broken wires
    misset switch, missing jumpers. and so on.

    Chech for obviously damaged component(components burned or discolore due to overheating);
    Dust + dirt + tear +wear

    2) Reseating Boards and components:

    Edge connectors are a common souorce of problems. Power down the system and remove the PC boards. Examine the edge connector
    for contamination and clean with contacts cleaner contacts. Reseat any loose components such as scoketed ICs) .

    Reseat and clean very well the
    boards and power up+look for dry +colder joint solder


    3) Power supply checks:
    Check the power supply for missing voltages and voltages out of spec. A digital multimieter DMM can be necessary, as
    voltage specifications are quite tight: logic supplies for example: must be within + 5% percent of 5Vdc. All the
    multiple supplies and all must be checked.

    4) Measure the power supply 24Vdc for CPU, and look for pins bends, or corroded.

    5) Measure the Clock,

    6) Finally Reset the Cpu , attached is the schematic, how to do it
     

    Attached Files:

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