R2 OPL3 Module


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Parts List:
MBHP OPL3 Orderlist (last update: 06-2010)
+------------+------------------------------------+-----+
| Loc.       | Description                        | Qty |
+------------+------------------------------------+-----+
| IC3,5,6    | TL074                              |  3  |
| IC3,5,6    | IC-Sockets for TL074               |  3  |
| Q1         | TTL Oscillator 14.318 MHz          |  1  |
| R1         | Resistor 470 Ohm                   |  1  |
| R2,3       | Resistor 33 Ohm                    |  2  | 
| R6,9,12,15 | Resistor 22K Ohm                   |  4  |
|R17,19,21,23| Resistor 220 Ohm                   |  4  | 
+------------+------------------------------------+-----+
|R4,5,7,8,10 | \               /                  |     |
|11,13,14,16 | Resistor 10K Ohm                   | 12  |
|18,20,22    | /               \                  |     |
+------------+------------------------------------+-----+
|C1,3,5,7,11 | \               /                  |     |
|16,18,20,22 | Electrolytic Cap 10µF              | 15  |
|24,26,31,32 | 10uF - 35v                         |     |
|33,34       | /               \                  |     |
+------------+------------------------------------+-----+
|C2,4,6,15,17| Ceramic Cap 100nF=.1µF             |  9  |
|19,21,23,25 | /               \                  |     |
+------------+------------------------------------+-----+ 
|C8,12       | Ceramic Cap 68 pF                  |  2  |
|C9,10,13,14 | Ceramic Cap 2.7 nF                 |  4  |
|C27,28,29,30| Ceramic Cap 100 pF                 |  4  |
| Jx,OUT1-4  | 1-row SIL Headers (25 pins)        | --- |
| LED1       | Green Power LED                    |  1  |
+------------+------------------------------------+-----+
Note 1: YMF262 and YAC512 are not listed here - you have to desolder it from an old 
        Soundblaster compatible card, or you can participate in a group order.  See
        the forum for info.
Note 2: Normally soundblaster cards are only stuffed with one YAC512, so you either
        have to cannibalize two cards, or you have to pass on the 3rd and 4th audio
        out - in this case you can also leave out the 2nd TL074 (IC5) and everything
        related to these audio channels.
Note 3: Parts for the +12/-12V PSU not listed here

PCBs are available: Click to order.



PCB:

Please Note: the YAC chip near C5/C6/R3 is incorrectly labeled IC3 and should read IC4.

Construction Tips:

First install the SMD IC's on the solder side of the PCB:


Then install your jumpers: (locations shown in red)


Changelog:
06.02.2010
Changes from R1:

"gapped" trace fixed (no more error jumper)

Part designation silkscreen changed to match official schematic

Duplicate designations corrected in official schematic and .brd file (thanks TK!)


For complete technical info and instructions see www.midibox.org