This mod is only simple circuit modification. Dettach PIN#12 of DAC from PCB(Printed Circuit Board) and pull-it up to Vcc by 10k ohm resistor. You can find Vcc at PIN#1 of NGC connector(Triangle mark will be there).
But, this part is most hard to do. Because you need soldering on such a small IC.
So, I made following procedure to make this easier.
ĦĦRemove solders from PIN#12 of DAC. Use mesh wire or someting like that.
Heat PIN#12 of DAC. Then slip in the corner of "oven sheet" between lead and PCB. Don't push soldering iron much hard.
Now you dettached PIN#12 from PCB.Next, you must isolate them
Cut oven sheet to small piece,and fold it to double. And put it in between lead and PCB.
If you have double sided stick tape. Cut it small and attach it to PCB. This will hold resistor.
Then, put resistor on the stick tape. And bend resistor's lead to sutable position.
And , solder it.
Soldering is only needed at 2 points. One for PIN#12 of DAC. Another one for PIN#1 of CONNECTOR.
For safety reason. I recommend you to attache isolation tape to reverse side of "can"
Your soldering goal will be followings. (Oven Paper not shown)