Meccanoid G15 Brain Surgery

Oh the Horror

Not exactly Brain Surgery.  It is a brain of sorts.

Having trouble with the clock not holding time since day one I knew I’d have to replace the clock battery sooner or later, or so I thought.  Ha.

After updating the firmware flash and downloading the new App; the clock not functioning is now an issue because the drag and drop “behavior” programming has a use for it.  There’s also a hidden function in ‘settings’ menu that allows setting an alarm.  Woo hoo.  I was thinking that would be a nice function about a year ago.  Scary.

I had it apart once before but only for cursory examination  to check the board to see if it was indeed the one that had a clock battery and not a third farad capacitor.  Sure enough it had a battery hard soldered.  Not having an extra one of that type or any other suitable replacement to be soldered in I quickly slapped it back together without much further examination.

Oooops.   Ya.   Assumptions and all that.  Take a look.  Nice solder job.  NOT.

g15-controller-4

Can you see it?  Just above the clock chip.  No?  Look closer to battery to the right of “C24”.

g15-controller-5-1
Somethings aren’t better at higher res just uglier.

How about now?

g15-controller-7-1
Magic.  All purty like.

You know when you give a people a bowl a rice a day and work for 14 or more hours this happens.  I’m just saying.  I could be wrong, but given that the vast majority of chips on this board are China Mart , probably not.

There were some other nice pieces of solder slag laying on the board.  I’ve become accustomed to checking boards from overseas manufacturers.  Not only China.  Please don’t think I’m picking on China.  Many manufacturers produce quality products cheaply.  This is not one of those.  Lots of nice cold solder joints too.

g15-controller-6
Short waiting to happen.

Here’s one the larger pieces for example.  Doesn’t look like much but was laying across traces next to the blob.  The black blob is the CPU/MCU.  It didn’t appear to be attached by anything other green protectant paint layer.  Most were like that and smaller.  Not cool.

Checked the clock battery at 2.85VDC,  not great but good enough for a while.  Not worthy of a replace.    Cleaned up what I thought I should and put it back together.  FWIW that solder slab was shorting to clock crystal to one of the clock IC pins.  The clock does work now.  However the Firmware /ROM has issues.  More on that laters.  ONE Down.  Pencil in another dozen problems.  Sigh.    A few more pics for ya:

g15-controller-3g15-controller-2g15-controller-1

 

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