Samsung AC009BNLDCH Service Manual page 260

Troubleshooting
Indoor/outdoor communication error (2 min.) (Error Code: E202) (Cont.)
Communication IC Measuring Part
Measuring Part
Location
#5-GND, #6- Communication A,
Measuring Point
#7-Communication B, #8-Vcc
Communication IC Measuring (Port)
#6 - #5
#7 - #5
#8 - #5
TVS-Diode Measuring
Both ends of diode
4-66
(Circuit Diagram)
Steady-state Measuring Value
COM 1(RED)
0.9kΩ ~ 1.2kΩ
0.9kΩ ~ 1.2kΩ
4.7Vdc ~ 5.3Vdc
Example of Measuring
Communication IC
Comm B(#7)
Comm A(#6)
Vcc (#8)
GND(#5)
Measuring after separating the
Steady-state Measuring Value
1kΩ or above
Example of Measuring
TVS-Diode
Remark
communicatio connection
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