McQuay MWM Service Manual Book page 34

9.3 Sequential Main Board SQMB01 (New Version)
9.4 Sequential LCD Panel SQ-LCD (New Version)
SQLCD (LCD Panel) from old to new
Step 1: Remove Jumper: J1, J2
Step 2: Add Chip Resistor. 1/10W 5% 200K
to R8, R9, R10
Step 3: Add Part: 1000000030
IC: SMD MAX1483CSA to U4
Part: 2051-MAX1483 IC
:MAX1483
Jumper J1 and
J2 removed
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