[sdiy] help with uQ repair
Julian Schmidt
elfenjunge at gmx.net
Thu Feb 23 17:26:52 CET 2017
I did search for the service manual but could only find people claiming
they are very hard to find and not public.
I would LOVE a link to the service docs!
I only found the service manual for the wave,
I checked 3.3V from the LF33CV and the 5V rail from the 7805 with the
big heat sink.
I also checked that the clocks are present.
Tried contacting waldorf a few days ago regarding service documents but
got no response so far.
I'll have a closer look at the data and address lines of the flash
memory next.
Thanks for all the help!
Best,
Julian
Am 23.02.2017 um 17:13 schrieb Peter Pearson:
> 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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