Yamaha SRCD, ERCX, DRCX, SRCX user manual Troubleshooting, Symptom Probable causes Checkpoints Action

CHAPTER2 Ethernet Unit

2-13 Troubleshooting

When problems occur, then troubleshoot as needed by using the following information as a guide. Be sure to always also refer to sections on “Troubleshooting” in the controller user’s manual as well as the instruction manual for the other party’s equipment such as PCs or HUB peripheral devices. If taking the troubleshooting steps listed there does not eliminate the problem, then quickly contact your local YAMAHA sales dealer.

No.	Symptom		Probable causes	Checkpoints	Action
1	Cannot make			• Disconnect the controller from the	• If timeouts still occur when connected
	TELNET			network and connect the PC instead.	this way (using PC instead of
	connection.			(Use a PC capable of a good	controller), then the problem is on the
	(Using “ping”			connection with the network. Make the	client side or in the HUB peripheral
	only results in			same IP address, subnet mask and	device. (Check probable causes 1
	a timeout.)			gateway settings as used on the	through 6.)
				controller.)	• If a replay comes back normally, then
				Now try running “ping” from the client	the problem is in the controller, so
				while setup as above, and check for a	check probable causes 7 through 8.
				response.
		1)	Ethernet cable	• Check if securely attached to the	• Insert in firmly until a click noise is
			defects, poor	modular connector.	heard.
			connection, or	• Check for a disconnection (or break) in	• Correct the wiring if a miswire is
			wrong specs.	the cable or a miswire.	found. Replace the cable if a break in
				• Check if the straight-through cable or	the wiring is found.
				crossover cable are being used for the	• Use a straight-through cable between
				wrong connection.	the HUB and controller. Use a
				• Try replacing the cables.	crossover cable if connecting directly
					to the other party’s device.
					• If operation returns to normal, then the
					problem is in the cables. Replace the
					cable.
		2)	Defective HUB	• Try changing to another port.	• If operation returns to normal then the
			or wrong settings	• Check if the communication mode is	port is defective, so do not use that
				manually set to other than 10Mbps/Half	port.
				Duplex.	• When setting the HUB communication
				• Try another HUB	mode manually, then set it to
					10Mbps/Half Duplex.
					• If operation returns to normal then the
					HUB is defective, so replace the HUB.
		3)	Router is	• Check the router settings.	• Redo the router settings.
			defective or	• Try substituting with another router.	• If operation returns to normal then the
			wrong settings		router is defective so replace the
					router.
		4)	Network adapter	• Check the network settings on the	• Redo the network settings on the client
			used by the client	client side.	side.
			is defective or the	• Try substituting with another network	• If operation returns to normal then the
			settings on the	adapter on the client side.	network adapter is defective so replace
			client side are		the adapter.
			wrong.
		5)	Network traffic	• Check if the traffic load is appropriate.	• Change the network structure to get a
			(communication		smaller traffic load.
			data load) is too
			heavy.
		6)	Ethernet cable is	• Check how and where the Ethernet	• Separate the Ethernet cable from
			too close to a	cables are installed.	potential noise sources.
			noise source such
			as motor cables.

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