Z-World RabbitCore RCM3200 User Manual - page 37
User’s Manual
33
A.5 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-5. The conformal coating protects these high-impedance circuits from the
effects of moisture and contaminants over time.
Figure A-5. RCM3200 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
U1
U6
R28
R38
R41
C5
C3
C9
C8
C12
C17
C23
C30
C18
C29
C35
C33
R29
R37
R39
R40
R42
Y3
C42
R35
R31
R27
R25
DS1
R67
R70
J4
C79
Y4
C83
C86 GND
R75
R74
R71
DS3
DS2
R63 R64
C71 C72
C68
C64
C67
L2
U8
R49
R48
C62
R51
C61
R44
R47
C59
C49
C57
L1
R69
R72
R73
C75
C74
R58
C53
C47
C48
C45
C44
C43
JP5
C31
JP3
JP4
C28
C27
C37
C36
C32
R24
R22
C19
R23
C24
R20
C20
R19
C16
C15
R17
R18
R7
R9
R1
R8
C1
R10
R14
C4
SPD LNK
ACT
J3
U5
U4
D1
Q1
C39
RP1