When The Rs485 Is Not Connecting - Samsung DMS2.5 Service Manual

Troubleshooting

5-2-4. When the RS485 is Not Connecting

Is the cable connection for RS485 proper?
Is the polarity of RS485 cable correct?
[Left : +(or "A"), Right : – (or "B")]
Change Main Board
5-6
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Start
Yes
Yes
End
No
Check the condition of cable connection
No
Check the polarity of RS485 cable
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