Question about Lexmark X4270 All-In-One InkJet Printer
If on connecting to the line there is a busy tone always then it is possible that the line switching circuit is faulty.
You will need to check on the optocoupler and the transistor drive in the line section for a possible short that makes the line busy.
Posted on Sep 14, 2010
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Posted on Jan 02, 2017
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