HAWK-800 Constructions and Installations Instructions –
Is Your Soldering Good?
Maybe you have 'some' soldering experience but don't actually have good knowledge of how to solder. Don't be
embarrassed about that. Good soldering is both a skill and an art. If you are not sure if your soldering is good, send a
picture of the back of your HAWK board to
and we can tell you if it looks good or not. If you are
not sure about your soldering skills check out this youtube video and watch and learn.
https://www.youtube.com/watch?
If you were not soldering properly, you can redo the soldering. But again, what the youtube and learn about
the right way to solder, how much solder to use, how to heat the joint first. And how to redo a bad joint.
Check All Soldering for Bridges or Missed Joints
Now, check for:
1. Un-soldered pins. Pins that were not soldered at all.
a) Check every solder point on the HAWK board.
b) Check each pin for the IC29 socket on the main board.
c) Check each pin for the EPROM socket.
d) For the MK2, check all of the connections related to the MK2 installation.
2. Bridged pins. Where you joined two or more pins together when they should not be.
a) Check every solder point on the HAWK board.
b) Check each pin for the IC29 socket on the main board.
c) Check each pin for the EPROM socket.
d) For the MK2, check all of the connections related to the MK2 installation.
If none of the above helps to bring your Poly/HAWK alive then proceed to the next stage.
Main Board Checks
Using a multimeter and with the power unplugged from your synth, on the main board, check the following:
IC29 Socket
IC 29 socket between pins 16 and 6 should show zero ohms (shorted).
IC 29 socket between pins 16 and 6 should both show shorted to pin 28 on the IC 22 socket.
IC 29 socket between pins 4, 5 and 8 should show shorted.
IC 29 socket between pins 4,5 and 8 should also all show shorted to pin 14 on the IC22 socket.
There should
NOT
be any shorts between IC29 pins 1, 2, 3, 7, 9, 10, 11, 12, 13, 14 and 15. Your ohm-meter might show
some resistance but it should NOT show a zero ohms short.
IC29 socket pin 1 should show a short with IC24 pin 26.
IC29 socket pin 2 should show a short with IC24 pin 27.
IC29 socket pin 3 should show a short with IC24 pin 28.
IC29 socket pin 7 should show a short with IC26 pin 9.
IC29 socket pin 9 should show a short with IC16 pin 4
IC29 socket pin 10 should show a short with IC16 pin 9.
IC29 socket pin 11 should show a short with IC34 pin 4.
IC29 socket pin 12 should show a short with IC16 pin 12.
IC29 socket pin 13 should show a short with IC25 pin 8.
IC29 socket pin 14 should show a short with DTC2 pin E (emitter). It's difficult to figure out which pin is the emitter so just
test all three pins on DTC2 until you get a zero ohms reading on one of the three.
IC29 socket pin 15 should show a short with IC22 socket pin 20.
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