User`s manual

68 RabbitCore RCM3400
A.5 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-5. The conformal coating protects these high-impedance circuits from the
effects of moisture and contaminants over time.
Figure A-5. RCM3400 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.
Conformally coated
area
JP1
C61
C59
C56
JP2
R21
C40
C39
C33 C34
C28
U3
C22
U2
C48
C53
C51
RP2
RP3
RP4
JP3
C55
C50
R25
R24
C62
D1
C35
R20
R18
R17
R13
C32
R11
C31
Y1
U5
U7
U1
C9
C8
R1
R4
C1
C3 C4 C5
C24 C25
C19
C14
C13
C2
R3