Modification for the 8-40 ZIF Adapter
(Part # 840Z)

Only perform this modification on adapter revision 03201 or 03221.

Perform this modification if you have trouble programming 28-pin PIC18Fxxx devices that require a AVdd connection on pin 7, such as 18F2331 and 18F2431.

Only change the back (solder side) of the printed circuit board.

Solder a wire between the  pins as shown.   26-30 gauge wire-wrap wire can be used.

Modification for the 40/28 ZIF Adapter
(Part # 4028Z)

Only perform this modification on adapter revision 95181 or 01189.

Perform this modification if you have trouble programming 28-pin PIC18Fxxx devices that require a AVdd connection on pin 7, such as 18F2331 and 18F2431.

Only change the back (solder side) of the printed circuit board.

Solder a wire between the  pins as shown.   26-30 gauge wire-wrap wire can be used.

Modification for the 28-pin SOIC ZIF Adapter
(Part # 28SOIC)

Only perform this modification on adapter revision 03311.

Perform this modification if you have trouble programming 28-pin PIC18Fxxx devices that require a AVdd connection on pin 7, such as 18F2331 and 18F2431.

Only change the back (solder side) of the printed circuit board.

Solder a wire between the  pins as shown.   26-30 gauge wire-wrap wire can be used.

Modification for 8/18/20 ZIF Adapter
(Part # 820Z)

Only perform this modification on adapter revision 99273.

Perform this modification if you have problems programming the 8, 18, or 20-pin PIC16Fxxx  or 18Fxxx devices.

Only change the back (solder side) of the printed circuit board.

Cut the trace as shown using a sharp knife or a rotary tool with a small engraving bit.  Cut deeply into the board to make sure that the trace is completely severed.

Solder a wire bridge between the 2 pins as shown.  26-30 gauge wire-wrap wire can be used. 

Modification for the 40/28 ZIF Adapter
(Part # 4028Z)

Only perform this modification on adapter revision 95181.

Perform this modification if you have trouble programming the 28 or 40-pin PIC16Fxxx or PIC18Fxxx devices.

Only change the back (solder side) of the printed circuit board.

Solder a wire between the 4 pins as shown (all 4 pins should be electrically connected to one another).   26-30 gauge wire-wrap wire can be used.