Toshiba MX-104 instruction manual Rear Panel, Power Switch Power

Rear Panel

Power Switch (POWER)

The power switch is a three- position type with the middle position being the "off position.

The MX-104 should be operated

in the switch position which produces the lowest amount of system hum.

Speaker Jacks (SPEAKERS)

The speaker outputs are stand- ard 1/4" phone jacks wired in parallel. Speaker cables (recom- mend at least #18 gauge wire) should be connected between the MX-104 and the speaker

systems prior to applying power to the unit.

Caution - The MX-104 should

never be operated into less than

a 4 ohm speaker load.

Earth Terminal (GND)

AC Power Cord

The power cord is the three-wire

type with proper grounding faci-

lities.

Caution - The ground pin should

not be removed under any cir- cumstances. If the MX-104 must be used without proper ground- ing facilities, a suitable ground- ing adapter should be utilized.

Operation of the MX-104 with proper grounding techniques

will result in less system noise

and greatly reduced shock hazard.

Cord Wrap

The cord wrap is provided for convenient storage of the power cord when the MX-104 is not in use.

Caution - The power cord should

always be completely removed from the cord wrap prior to operation of the unit. This will insure maximum cooling of the MX-104. For the same reason, adequate clearance should be maintained between the rear panel and any other surface (4-6 inches should do). The vents on the bottom and top of the MX-

104are also provided for convec- tion cooling. These vents should be kept clear and open. Failure to do so may cause thermal shut- down of the unit.

Warning - To avoid possible

equipment damage and/or per- sonnel injury, the fuse should always be replaced with same type and rating. Using improper

fuses will also void the warran-

ty. The MX-104 should always be disconnected from AC outlet prior to changing fuses. If fuse repeatedly fails, the unit should be referred to qualified service personnel for repair.

Fault Protection Table

Fault	Protection	Indication	Action	Restoration
Excessive current due to	Current limiter activates at	Compressor	Remove excessive loads.	Automatic restoration
overloads.	less than 2 ohm.	LED illuminates.	Minimum speaker loads	after normal loads are
			4 ohm.	obtained.
Short circuits	Current limiter activates,	Amp protection	Check speaker	Turn off power switch.
(less than 0.4-ohm)	input signal is lowered,	LED illuminates.	lines/systems for shorts.	Turn on into operational
	unit shuts down,			loads.
Temperature rise of heat	Input signal is lowered.	Amp protection	Check for adequate	Automatic restoration
sink	Unit shuts down.	LED illuminates.	ventilation.	after temperature
(more than 105°C)				lowers (to 75° - 95° C)
DC drift	Input signal is lowered.	Amp protection	Refer to qualified service	Automatic restoration
	Unit shuts down.	LED illuminates.	personnel.	after normal bias is
				regained.

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