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Suggestions on the soldering order
I finished building my LXR today (Revision 2 Board), and would like to make some suggestions for a changed building order. I would be interested in your opinions on that.
1.) do the bottom board assembly in the order of the parts size. That means
* Bridge
* Diodes
* Resistors
* ceramic caps
* IC socket
* electrolytic caps
* power socket
* USB socket
* audio jacks
* female 2x13 header
DO NOT mount/solder the MIDI sockets now (I'll do it after mounting the display - see below), do not mount/solder the 5V-regulator now! The uprising regulator is quite annoying while handling the pcb.
In consequence: Leave away the first 5V check.
2.) now do all top side stuff until Step 14:
* Insert the pin array normally (not upside down as suggested)
* solder the most left pin
* solder the most right pin
* now heat again the solder of the most left pin and pull the array at this side slightly from the pcb, so the pins is raised on the soldering side only 0,5mm over the pcb.
* now heat again the solder of the most right pin and pull the array in
this side slightly from the pcb, so all the pins are raised on the soldering side only 0,5mm over
the pcb.
* now solder the other pins of the array.
* put some tape over the solder joints.
* Now mount and solder the DIN-sockets to the board
The tape is not really required, as the only open contact on the bottom of the DIN socket (the ground connection) is placed in a sunk area. But prudence is the better part of valor (or as we Germans say: "Caution is the mother of the crate containing the chinaware")
After you have mounted and soldered the potentiometers and the encoder, you should add the voltage regulator to the bottom, and now do the (second) voltage test. Or is there any argument to do the first 5V-check?
Also one might first solder the LEDs and then the tactile switches, as those are slightly higher than the LEDs.
Best regards
Florian
1.) do the bottom board assembly in the order of the parts size. That means
* Bridge
* Diodes
* Resistors
* ceramic caps
* IC socket
* electrolytic caps
* power socket
* USB socket
* audio jacks
* female 2x13 header
DO NOT mount/solder the MIDI sockets now (I'll do it after mounting the display - see below), do not mount/solder the 5V-regulator now! The uprising regulator is quite annoying while handling the pcb.
In consequence: Leave away the first 5V check.
2.) now do all top side stuff until Step 14:
* Insert the pin array normally (not upside down as suggested)
* solder the most left pin
* solder the most right pin
* now heat again the solder of the most left pin and pull the array at this side slightly from the pcb, so the pins is raised on the soldering side only 0,5mm over the pcb.
* now heat again the solder of the most right pin and pull the array in
this side slightly from the pcb, so all the pins are raised on the soldering side only 0,5mm over
the pcb.
* now solder the other pins of the array.
* put some tape over the solder joints.
* Now mount and solder the DIN-sockets to the board
The tape is not really required, as the only open contact on the bottom of the DIN socket (the ground connection) is placed in a sunk area. But prudence is the better part of valor (or as we Germans say: "Caution is the mother of the crate containing the chinaware")
After you have mounted and soldered the potentiometers and the encoder, you should add the voltage regulator to the bottom, and now do the (second) voltage test. Or is there any argument to do the first 5V-check?
Also one might first solder the LEDs and then the tactile switches, as those are slightly higher than the LEDs.
Best regards
Florian