Conformal Coating - Rabbit RabbitCore RCM4100 User Manual

A.6 Conformal Coating
The areas around the 32 kHz real-time clock crystal oscillator have had the Dow Corning
silicone-based 1-2620 conformal coating applied. The conformally coated area is shown
in Figure A-6. The conformal coating protects these high-impedance circuits from the
effects of moisture and contaminants over time.
Figure A-6. RCM4100 Areas Receiving Conformal Coating
Any components in the conformally coated area may be replaced using standard soldering
procedures for surface-mounted components. A new conformal coating should then be
applied to offer continuing protection against the effects of moisture and contaminants.
NOTE: For more information on conformal coatings, refer to Technical Note 303, Con-
formal Coatings.
80
Conformally coated
area
R13
R12
C25 C19
C26
C20
C30
C6
C31
C7
R3
JP1
JP2
JP9
C36
JP6
C38
C39 C21 JP7
C27 R18
C29
JP3
R9
R11
C28 R21
RP1
R19
JP5
C23
JP4
R10
R22 R17 R16
C1
U1
C15
C16
C2
C17
C4
RabbitCore RCM4100