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Repair
16 309909H
User Interface
Removal
1. Close main air shutoff valve on air supply line and
on unit.
2. Remove side panels (21).
3. Remove fasteners (45). Gently pull user interface
(11) away from pneumatic control (10).
4. To completely remove user interface (11), discon-
nect ground wire (315), and wires (416 and 406)
from main control board (301). See Electrical
Schematic, page 22.
Software Upgrades
1. Remove User Interface cover. See above.
2. Use a chip remover (D) to remove software chip (C).
F
IG. 2.
3. Install new chip (beveled corner down).
4. Reassemble.
5. Recalibrate main circuit board. See ProMix Easy
Operation Manual.
F
IG. 1
45
10
11
315
TI4901a
21
CAUTION
To avoid damaging circuit board, wear a grounding
strap.
F
IG. 2
C
D