...
J6_COREx, J7_COREx (for analog outputs via AOUT modules)
J5_COREx (for analog inputs)
Check this:
Now after soldering all those, you can start soldering together the PSU section. Go back to the start of this guide and follow the soldering instructions for the PSU option you want to use. Then follow the soldering instructions for the power socket and power switch for that PSU option.
Test that the power rails and ground are not connected (shorted). You can test this at J4.
Test that each of the following IC socket's pins are correctly connected to the 5V rail:
SIDs: test pin 25 (fourth from top right); COREs: test pin 11 (eleventh from top left); 74HC595/74HC165s: test pin 16 (first from top right) Optocoupler 6N138: test pin 8 (first from top right)
Test that each of the following IC socket's pins are correctly connected to ground:
SIDs: test pin 14 (bottom left) COREs: test pin 12 (twelfth from top left) 74HC595/74HC165s: test pin 8 (bottom left) Optocoupler 6N138: test pin 5 (bottom right)
You should now be ready to plug in your power supply and turn on the power switch. It is important that you get your multimeter ready to test the voltages at J4, and test them quickly after turning on the switch, so if you don't see the right voltages, then you can turn it off quickly and avoid damaging components. If you've put the bridge rectifier and capacitors in the correct way and tested for short circuits across the power rails, then you should not have a problem.
Before connecting power to the power socket:
Check you've completely followed the soldering instructions for the PSU option of your choice, especially soldering the bridge at J71, J72 and J73 (if instructed to do so).
Check the orientation of J1A (if you are using a panel-mount socket to connect a C64 PSU). It is a good idea to test the voltages coming out of the C64 PSU first, to make sure you really have 5V and ground connected to the right pins! Ideally you should use a polarized header and connector for J1A to avoid swapping 5V and ground and destroying components!
Then connect the power, turn on the switch and:
Check DC voltage between 5V and ground at J3.
If using PSU Option A or B, check voltage at J25 (should be above 9V, around 11V depending on load).
Check output of V1 by checking voltage across C12 (bottom pin should be 9V relative to top pin).
Check 9V pin of J1_SID1, J2_SID1 relative to ground (at ground pin of J3).
If using PSU Option B, check 12V pin of J1_SID1, J2_SID1 relative to ground (at ground pin of J3).
Insert jumper into J1_SID1, J2_SID1 depending on type of SID - 9V for 8580/6582, 12V for 6581
Check voltage between pin 28 of SID socket (top right corner) relative to ground.
If these voltage checks are passed, then you have finished the PSU section and can continue. If these voltage checks fail, disconnect power immediately. You will have to work out what is wrong by testing connnections. Start with testing pins on the C64 PSU, then checking for any breaks in continuity between the power socket and the rest of the circuit, i.e. you can test if the switch is working and pins 1&2 and 4&5 are connected when the switch is on, etc.
Control surface build:
http://www.midibox.org/dokuwiki/doku.php?id=wilba_mb_6582
...