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Thread: Different part numbers the SBEC2 PCB board

  1. #1
    Supporting Member II Turbo Mopar Contributor
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    Different part numbers the SBEC2 PCB board

    I have found two different SBEC2 PCB board 4517652 and 4632377
    I am guessing that the 377 was the early release and my examples utilize the 87C257 latch chip
    The 652 was able to use the 87C257, 27C256, SST and Toshiba chip.
    I will be checking part number on the chip with the parts fiche.
    Any additional information will help.
    Regards,
    Miles

    DD '87 Sundance T1, 12PSI, SLH with rear disks
    '87 CSX #432

  2. #2
    Supporting Member II Turbo Mopar Contributor 85lebaront2's Avatar
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    Re: Different part numbers the SBEC2 PCB board

    Is the board number readable without destroying the SBEC?
    "growing old is inevitable, growing up is optional"
    1986 Lebaron convertible to replace totalled 85
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  3. #3
    Rhymes with tortoise. Turbo Mopar Staff cordes's Avatar
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    Re: Different part numbers the SBEC2 PCB board

    Quote Originally Posted by 85lebaront2 View Post
    Is the board number readable without destroying the SBEC?
    If you have one which is fairly clear, you should be able to read what is under the potting compound. IIRC, the numbers are toward the outside of the board and not obscured by components.

  4. #4
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    Re: Different part numbers the SBEC2 PCB board

    Quote Originally Posted by chromguy View Post
    I have found two different SBEC2 PCB board 4517652 and 4632377
    I am guessing that the 377 was the early release and my examples utilize the 87C257 latch chip
    The 652 was able to use the 87C257, 27C256, SST and Toshiba chip.
    I will be checking part number on the chip with the parts fiche.
    Any additional information will help.
    Where are you finding part number info at? I've been trying to id which of the 4 main chips is what in a SMEC for the last 3 months and haven't been able to cross reference or id anything.

  5. #5
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    Re: Different part numbers the SBEC2 PCB board

    Quote Originally Posted by 85lebaront2 View Post
    Is the board number readable without destroying the SBEC?
    Yes the PCB part number are on the back side of the board but if you look in my other post it will show you how to identify without flipping the board upside down
    http://www.turbo-mopar.com/forums/sh...652&highlight=

    - - - Updated - - -

    Quote Originally Posted by crusty shadow View Post
    Where are you finding part number info at? I've been trying to id which of the 4 main chips is what in a SMEC for the last 3 months and haven't been able to cross reference or id anything.
    I have not ripped my SMECs apart yet. Most chips are labelled with Mopar part number so it is difficult to say what they are. Please send picture as we maybe able to figure it out.
    Regards,
    Miles

    DD '87 Sundance T1, 12PSI, SLH with rear disks
    '87 CSX #432

  6. #6
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    Re: Different part numbers the SBEC2 PCB board

    The first one is a Motorola 68HC11 variant, i just need to know which one it is so i can figure out what clock speed it is, rom only or eprom memory.



    Next one is a Peripheral Interface Controller, only reason i know that is when i did a google search one of those chinese wholesale sites had them listed as such but no data sheet can be found anywhere on the site.


    next 2 i have no info on.





    Since all these chips are 30 years old nothing shows up in any online catalogs.

  7. #7
    Supporting Member II Turbo Mopar Contributor
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    Re: Different part numbers the SBEC2 PCB board

    Quote Originally Posted by crusty shadow View Post
    The first one is a Motorola 68HC11 variant, i just need to know which one it is so i can figure out what clock speed it is, rom only or eprom memory.

    Next one is a Peripheral Interface Controller, only reason i know that is when i did a google search one of those chinese wholesale sites had them listed as such but no data sheet can be found anywhere on the site.
    next 2 i have no info on.


    Since all these chips are 30 years old nothing shows up in any online catalogs.
    So sorry but I cannot see the pictures??

    Here are a few links to info on the LM and I am certain you will see similarities. I do on the SBEC/SBEC2
    TurboSOB send me this the other day.

    I found this:
    https://www.turbododge.com/threads/1984-1986-turbo-logic-module-information.662914/
    in linked this:
    http://www.turbo-2.com/pdf/adv-turbo-theory.pdf
    Regards,
    Miles

    DD '87 Sundance T1, 12PSI, SLH with rear disks
    '87 CSX #432

  8. #8
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    Re: Different part numbers the SBEC2 PCB board

    try these







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  9. #9
    Supporting Member II Turbo Mopar Contributor
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    Re: Different part numbers the SBEC2 PCB board

    Sorry I have done near zero on the SMEC other than a socketed one last weekend so I can bench test new products.
    Here is what I collected from Rob L on the 87 LM for what it is worth.
    87 LM
    Z20=40 pin 6803u4 (thanks Geoff)
    Z83=40pn 6821 PIA programmable interface adapter
    Z85=ADC0808
    Z22=28pin 6840 programmable timer on 87's (another 2764 or 24 pin 1kbyte rom
    on 85/86's)
    Z69=20pin 74HC373 octal latch used for address/data demux
    Z70=16pin 74HC139 decoder/demux used for address decoding
    Z80=14pin 74HC00 Quad Nand Gate - used for Wr/E and for ADC decoding
    Z51=28pin 28C128 UVPROM
    Z81=14pin 74HC14 Hex Inverting Scmidt Trigger - used for I/O protection and inversion of signals
    Z48=L293B/NTE1749 QUADRUPLE HALF-H DRIVERS
    Z47=Z43=DS3669/DS3668
    Regards,
    Miles

    DD '87 Sundance T1, 12PSI, SLH with rear disks
    '87 CSX #432

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