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User’s Manual
85
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. RCM3750 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
R37 DS3
J3
L4
DS2
DS1
R32
C55
R30
R34
C80
2
R39
R40
C79
Y3
4
1
R44
R46
R45
T1
U4
U6
J2
JP3
JP1
C7
U3
U1
R18 C35
RP1
RP2
R24
R36
R2
C25
C34
C33
C30
C32
C31
C83
C84
C81
C26
R15
R16
C27
C82 C28
C29
C41
R6
U5
R11 C37
Y1
C36
C39
R13
R5
JP2
Q1
C10
C40
R14
D1
C50 C51 R27
C49
C53
C54
R29
R26
R31
CAUTION: HOT!
Summary of Contents for RabbitCore
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