Zeppelin Design Labs VPM-1, Руководство пользователя

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APPENDIX 3: REPLACING THE DIGITAL POTENTIOMETER
Your VPM-1 Expression upgrade came with a 50K digital pot installed on the board. Some effects
pedals will work better for you with the optional 10K pot. Here’s how to swap them out.
WHAT YOU WILL NEED
1.
#2 Philips screw driver
2.
Small flat head screw driver
3.
A Sharpie or other black permanent marker
The digital potentiometer is a static-sensitive device. Please take the proper anti-static precautions
before handling this IC. Please review “A WORD OF CAUTION” about static sensitive parts on page
15 before continuing.
1. To access the expression board you’ll need to remove the VPM-1 main board chassis from the
volume pedal. Unscrew the 2 screws under the main board chassis (1). Before you unplug the
ribbon cable, use a black marker to draw some orientation marks on the ribbon cable header and
the main circuit board so you know which direction to plug the ribbon cable back in later (2). It is
very important to make sure this ribbon cable gets re-installed in the correct orientation.
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2. These digital potentiometer IC’s have 8 pins and are installed in a socket on the expression board.
Before you remove the digital potentiometer that is currently installed in the socket please note
the dot and divot on one end of the IC (3). These markings on the IC are closest to the end of the
socket with the divot.
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