Yamaha GX-90VCD Internal care, External care, English, MAINTENANCE, TROUBLESHOOTING, Deck, Deck, cleaning tape, sound and tape jams, carefully before use

MAINTENANCE

	Internal care
Deck 1	•	Dirty heads, capstans and pinch rollers can cause poor
		sound and tape jams.
		Clean these parts with a cotton swab moistened with
		commercially available head/pinch roller cleaner or
		isopropyl alcohol, or with a commercially available
	•	cleaning tape.
		After long use, the deck’s heads and capstans may
		become magnetized, causing poor sound. Demagnetize
		these parts once every 30 hours of playing/recording time
		by using a commercially available tape head
		demagnetizer. Read the demagnetizer’s instructions
Deck 2		carefully before use.
	External care
	•	Periodically clean the surfaces of this system, especially
		the top panel of the main unit to prevent the ventilation
	•	holes from being blocked with dust etc.
		Do not use chemically treated cleaning cloths or other
		chemicals. (See “Precautions”.)

TROUBLESHOOTING

If your unit fails to operate normally, check the following points to determine whether the fault can be corrected by the simple measures suggested. If it cannot, or if the fault is not listed in the SYMPTOM column, disconnect the power cord and contact your authorized YAMAHA dealer or service center for help.

	SYMPTOM	CAUSE	REMEDY
	No power even if the POWER switch is	AC supply lead is not plugged in.	Plug in the AC supply lead.
	pressed.
	No sound from one speaker	Loose speaker connections.	Connect properly.
	No sound from speakers.	Internal protection circuit is functioning.	Unplug the AC supply lead from the wall AC outlet, and then
			plug in again.
	No sound from the rear speakers.	One rear speaker connection is loose or bad.	Connect it properly.
		The sound output level to the rear speakers is	Raise the sound output level to the rear speakers.
		set to minimum.
		No sound field program is selected.	Select the appropriate program.
GENERAL	No sound from the center speaker.	The sound output level to the center speaker is	Raise the sound output level to the center speaker.
		set to minimum.
		The center channel mode is in PHANTOM	Select NORMAL mode.
		mode.
		Incorrect sound field program selection.	Select the appropriate program.
		No sound field program is selected.
	No sound (or no picture) from an external	Incorrect cord connections.	Connect the cords properly. If the problem persists, the
	unit connected with this system.		cords may be defective.
		Input source selection is not proper.	Make a proper input source selection.
	Can’t set timer.	Current time is not set.	Set current time.
	This unit will not operate properly.	The internal microcomputer has been frozen by	Unplug the AC supply lead from the wall AC outlet, and then
		an external electric shock (lightning, excessive	plug in again after about one minute.
		static electricity, etc.) or power supply with low
		voltage.

English

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