Conformal Coating - Rabbit RabbitCore RCM3209 User Manual

A.6 Conformal Coating
The areas around the 32 kHz real-time clock crystal oscillator has 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.
Conformally coated
Figure A-6. RCM3209/RCM3229 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 Rabbit's Technical Note
TN303, Conformal Coatings, in the online documentation.
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areas
U1
R15
U2
R2 J1
R4
R5
R6
U3
Y1 C5
U4
R11
C13
C17
U6 R12 R13 R14
C31
Y2
R18
C30
C29
R23
R25 R26
Y3
R24
2
C41
C42
JP1
J2
JP2 JP3 JP4 JP5
C8
C10
C9
C11
C18
L1
C26
C33
C32
J3
R16
L2
C34
U7
R19
R20
R21
1
C46
JP14
DS1
R33
Q1
R28
R34
C45
R29
U10 DS2
DS3
D1
Q2
U9
RCM39XX
DS4
RabbitCore RCM3209/RCM3229