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Moduku

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  1. If you are using the supplied LCD :

    High-power Backlight LCD (i.e. LED array)

    If you are using a high-power backlight LCD that requires 250mA or more, then you should put a shunt in

    JBL in the “12V†position. It is labelled “12V†but it actually will be whatever voltage is coming into the

    base PCB, i.e. the input to the 7809 voltage regulator. Most often this is going to be 12V-14V. Put a shunt

    in JR4 to increase current. Turn brightness trimpot to approximately 2 o'clock, this gives the optimal

    current for a high-power backlight LCD being supplied by 12V and is considered “safeâ€. Experienced

    builders can try connecting a 2-pin SIL connector to JBL and measuring the actual current passing

    through JBL pins (i.e. between 12V and the backlight circuit).

  2. Ok I tried re-uploading MIOS. Same transfer rates ( 0.02 Kb/s ). Took 835s. During upload LCD read "Rebooting MIOS". Once upload was completed, LCD showed Boot screen and then READY.

    post-8236-091548900 1295419796_thumb.jpg

    Uploaded to PIC1 too with the same results as PIC0.

    I have also updated the midi interface drivers but it didn't help.

  3. Guys I need a hand troubleshooting my MB6582 base pcb.

    I have done the suggested voltage and continuity tests in Wilba's PCB build guide and everything seems fine BUT:

    Uploading mb6582.hex to PIC0 takes forever ( >5000s ). Once finished MIOS 1.9g reboots and LCD stands in READY.

    I see no errors of any kind on MIOS studio during the upload.

    post-8236-087880500 1295406621_thumb.jpg

    This is with PSU option A. R80 is in place.

    Voltage readings without SIDs connected are as follows:

    J3 : 5.16v

    J25: 12.55v

    C12: 8.97v

    J1/2_SID1: 8.96v

    SIDs: 8.96v

    Cores: 5.15v

    Also uploaded testtone to PIC0, no sound.

    Any suggestions on where to look for what might be causing the slow transfer rates?

    Thanks in advance.

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