[sdiy] help with uQ repair
Julian Schmidt
elfenjunge at gmx.net
Thu Feb 23 18:01:15 CET 2017
I'm afraid thats for the microWAVE not the microQ.
But thanks nonetheless.
julian
Am 23.02.2017 um 17:31 schrieb Peter Pearson:
> Check +/- 12V
> https://elektrotanya.com/waldorf_microwave.pdf/download.html
>
> On Thu, Feb 23, 2017 at 11:30 Peter Pearson <electrocontinuo at gmail.com
> <mailto:electrocontinuo at gmail.com>> wrote:
>
> Check +/- 12V
>
> On Thu, Feb 23, 2017 at 11:29 Terry Shultz <thx1138 at earthlink.net
> <mailto:thx1138 at earthlink.net>> wrote:
>
> Hi All,
>
> On another note , if this is a DSPB56362 device, then Waldorf
> wold not have put any of their code into this device.
>
> I do not recall Motorola doing a custom DSPx56362 for Waldorf
> as the volumes used would not support the mask charges.
>
> http://www.nxp.com/assets/documents/data/en/data-sheets/DSP56362.pdf
>
> regards,
>
> Terry
>
>
>> On Feb 23, 2017, at 8:13 AM, Peter Pearson
>> <electrocontinuo at gmail.com
>> <mailto:electrocontinuo at gmail.com>> wrote:
>>
>> Check the supply means check all the supplies. Do you have
>> all the other rails and reference voltages? The service
>> manual is online and you could check that for resets etc. You
>> should also consider contacting Waldorf for advice.
>>
>> On Thu, Feb 23, 2017 at 10:46 Julian Schmidt
>> <elfenjunge at gmx.net <mailto:elfenjunge at gmx.net>> wrote:
>>
>> yeah but these are ROM not RAM.
>> The datasheet says "These ROMs may be factory programmed
>> with data or programs provided by the application developer."
>>
>> No idea if waldorf went all the way to burn a custom
>> loader into these ROMs at the chip factory.
>> At least the normal firmware should be located on the
>> flash, otherwise you could not update it.
>>
>> julian
>>
>>
>> Am 23.02.2017 um 16:39 schrieb Terry Shultz:
>>> Hello All,
>>>
>>> The DSP56362 Motorola DSP does have P, X, and Y memory
>>>
>>> On-Chip Memories
>>> — Modified Harvard architecture allows simultaneous
>>> access to program and data memories — 30720 x 24-bit
>>> on-chip program ROM1 (disabled in 16-bit compatibility mode)
>>> — 6144 x 24-bit on-chip X-data ROM1
>>> — 6144 x 24-bit on-chip Y-data ROM1
>>> — Program RAM, instruction cache, X data RAM, and Y data
>>> RAM sizes are programmable
>>>
>>> Instruction Cache
>>>
>>> Disabled Enabled Disabled Enabled
>>>
>>> Switch Mode
>>>
>>> Disabled Disabled Enabled Enabled
>>>
>>> Program RAM Size
>>>
>>> 3072 × 24-bit 2048 × 24-bit 5120 × 24-bit 4096 × 24-bit
>>>
>>> Instruction Cache Size
>>>
>>> 0
>>> 1024 × 24-bit 0
>>> 1024 × 24-bit
>>>
>>> X Data RAM Size
>>>
>>> 5632 × 24-bit 5632 × 24-bit 5632 × 24-bit 5632 × 24-bit
>>>
>>> Y Data RAM Size
>>>
>>> 5632 × 24-bit 5632 × 24-bit 3584 × 24-bit 3584 × 24-bit
>>>
>>> page4image15160 page4image15320
>>>
>>> 1.
>>>
>>> — 192 x 24-bit bootstrap ROM (disabled in sixteen-bit
>>> compatibility mode)
>>>
>>> *
>>>
>>> Off-Chip Memory Expansion
>>>
>>> o
>>>
>>> —
>>> Datamemoryexpansionto256Kx24-bitwordmemoryforP,X,andYmemoryusingSRAM.
>>>
>>>
>>> o
>>>
>>> —
>>> Datamemoryexpansionto16Mx24-bitwordmemoryforP,X,andYmemoryusingDRAM.
>>>
>>>
>>> o
>>>
>>> —
>>> Externalmemoryexpansionport(twenty-fourdatapinsforhighspeedexternalmemoryaccessallowing
>>> for a large number of external accesses per sample)
>>>
>>> *
>>> o
>>>
>>> — Chip select logic for glueless interface to
>>> SRAMs
>>>
>>> o
>>>
>>> — On-chip DRAM controller for glueless
>>> interface to DRAMs
>>>
>>>
>>> regards,
>>>
>>>
>>> Terry
>>>
>>>> On Feb 23, 2017, at 7:17 AM, Julian Schmidt
>>>> <elfenjunge at gmx.net <mailto:elfenjunge at gmx.net>> wrote:
>>>>
>>>> I checked the 3.3V supply and it delivers stable 3.3V
>>>> Xtal is running at 14.3MHz and the Clock IC is
>>>> forwarding the clock to the DSP
>>>>
>>>> I only worked with SHARC DSPs so far, but I guess the
>>>> motorola DSP has no internal program memory and is
>>>> bootet by the uC from flash and has its OS stored in
>>>> the attached SRAM?
>>>>
>>>> The rest of the PCB, especially around the DSPs looks
>>>> pretty good. All sketchy looking parts where located to
>>>> the left of the uC and the DSP is on its right side.
>>>> Caps look good, too.
>>>>
>>>> Here is a pic of the board.
>>>> http://chipmusik.de/dump/uQ.jpg
>>>>
>>>> I'm a bit concerned that the firmware update does not
>>>> seem to work, as I guess the DSP should not be involved
>>>> with that.
>>>> Maybe an indication that it could be the flash indeed?
>>>>
>>>> Any idea how to check the flash?
>>>>
>>>> Julian
>>>>
>>>> Am 23.02.2017 um 15:56 schrieb Christian Tecl:
>>>>> Hello list - hello Julian....
>>>>> I guess you already checked everything round that flip
>>>>> flop, resistors, diodes etc... To me there are also
>>>>> reasons to suggest a problem with power supply, maybe
>>>>> you check that also before soldering that dsp... And
>>>>> think about the possibility that it could be the
>>>>> flash, also. Like to hear what you are discovering.
>>>>> Greets Christian
>>>>> --
>>>>> Diese Nachricht wurde von meinem Android Mobiltelefon
>>>>> mit GMX Mail gesendet.
>>>>> Am 23.02.2017, 15:24, Julian Schmidt
>>>>> <elfenjunge at gmx.net> <mailto:elfenjunge at gmx.net> schrieb:
>>>>>
>>>>> I have a broken microQ in the workshop right now.
>>>>> It arrived with a scrambled LCD that only showed
>>>>> garbage.
>>>>>
>>>>> after opening it up I saw someone butcher the
>>>>> D-Flipflop (bend and
>>>>> shorted pins)
>>>>> after replacing it the unit boots again, waldorf
>>>>> welcome screen, os2.2,
>>>>> then preset name.
>>>>>
>>>>> yay!
>>>>>
>>>>> bad news is the unit immediately freezes. No
>>>>> buttons and encoders do
>>>>> something. :(
>>>>>
>>>>> I tried the firmware update but on reveiving the
>>>>> sysex data the power
>>>>> button makes a quick flash, 4 or 5 vertical bars
>>>>> appear in the LCD and
>>>>> then nothing happens. Pingpong chaselight on the
>>>>> Inst. 1-4 LEDs and the
>>>>> message "please play back dump" or something like
>>>>> that in the screen.
>>>>>
>>>>> In factory test mode all buttons, LEDs and
>>>>> encoders work.
>>>>> Audio out test does not work (silence on all outs)
>>>>> and the DSP test fails.
>>>>> it only shows:
>>>>>
>>>>> 1:----- 2:----- 3:sig!
>>>>>
>>>>> and repeatedly flashes "DSP REBOOT" every second.
>>>>>
>>>>> So my guess is that I have a broken DSP.
>>>>>
>>>>> Is it worth it to try and replace the DSP? they
>>>>> are still in stock at
>>>>> digikey.
>>>>> But I am open for other ideas since I'm not keen
>>>>> on desoldering the LQFP144.
>>>>>
>>>>> Best,
>>>>> Julian
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