User’s Manual
65
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. RCM3600 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
R23
C31
C32
C34
C4
C33
C7
C2
JP3
JP2
JP1
R1
C1
C12
C13
C21
C14
C18
C15
U1
U4
R13
U5
C25
C17
C16
C5
C19
RP1
C20
RP3
C10R11
Y1
C24 R4 R5
C22 C23
R6
RP5
R8
R16
R15 R2
R9
U2
U3
J2
C26
Q1
R14
R18
U6
R22
R7
C1
1
C8
C9
R3
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