WP
4
PotentiaMeter
Cleaning and Maintenance
49
cotton swabs to clean the block sensors. Most cotton
swabs contain adhesives and other compounds that
are released and transferred to the mirror and other
surfaces, contaminating them.
Cleaning the Block and Sensors
Accessing the Block
1. Unplug your WP4.
2. Remove the case lid screw located on the back
panel. Carefully remove the lid by pulling the
back of the lid upward and then sliding the lid
back (away from the front of the case) and off.
3. Unscrew the two thumbscrews that secure the
sensor block.
4. Unplug the cable with the 20-pin socket that
attaches the block to the main circuit board by
releasing the two locking levers that are on
either side of the socket.
5. Carefully lift the block straight up from its
mount. Turn the block over to expose the cham-
ber cavity as shown in the illustration:
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