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Troubleshooting
If the DTA-70.1 fails to function normally, first check the
following points before contacting the dealer from
whom you purchased this unit. If the problem is not
solved after going through the following list, unplug the
power cord and contact the dealer from whom you pur-
chased this unit.
No power.
• Power cord is not correctly plugged into AC outlet/
Inlet.
→ Plug the power cord into the AC outlet/Inlet prop-
erly.
• Power switch is not set to On position.
→ Set the Power switch to On.
Power turns on but no sound.
• Incomplete connections.
→ Check speaker cable connections.
→ Insert all plugs firmly into jacks.
• No input signal from control amplifier.
→ Check for input signal from control amplifier.
• Incorrect INPUT SELECT switch setting.
→ Set INPUT SELECT switch to correct setting.
The Standby indicator flashes red.
• The protection circuitry has been activated.
→ Remove the power cord from the wall outlet
immediately. Set the Power switch to Off, disconnect
all speaker cables and input sources, and then leave
the amplifier with its power cord disconnected for 1
hour. After that, reconnect the power cord, set the
Power switch to On. If the amplifier stays on, dis-
connect the power cord, and reconnect your speakers
and input sources. If the amplifier turns off, discon-
nect the power cord, and contact the dealer from
whom you purchased this unit.
The 12V trigger of the DTA-70.1 does not react
to that of the DHC-80.1.
• Connection between the 12V trigger terminals is
incomplete.
→ Connect the cables to the terminals firmly.
Humming or other noise is heard.
• Input cable connection is incomplete.
→ Insert the input cable to pin jack or connector
completely.
• Noise from power cord or power transformer affects
the input cable.
→ Keep power cord or power transformer away from
the input cable.
• Power cord or speaker cables are bundled together
with pin cords.
→ This may cause humming or noise. Do not bundle
power cord or speaker cables with pin cables
together.
• Connection to the input terminals is not complete or
not appropriate.
→ For each channel’s input terminals, connect cables
or cords to either balanced input terminal or audio
input terminal only and switch the INPUT SELECT
switch accordingly.
Avoid connecting the cables or cords to the input ter-
minals that will not be used.
DTA-70.1_En_100108.book Page 18 Friday, January 8, 2010 2:04 PM