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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.
Conformally coated
Figure A-5. RCM4200 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.
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LINK
R49
DS3
R48
SPEED
R50
C26
C31
area
C35
C38
R21
C28
C29
C43
L2
C88
R3
R20
R31
R51
R5
R35
R33
R32
R41
C72
JP11
JP10
C78
JP12
C77
R47
JP1
R14
JP2
R52
JP15
C25
JP9
C85
C19
R29
JP6
JP13
C18
R4
C20
C7
JP7
JP3
JP5
JP4
U15
C6
JP8
C13
C14
C39
R18
R9
U7
C21 R1 R10
U6
R44
R22
R39
R42
R16
R11
R2
R46
R45
R43
RabbitCore RCM4200
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