23
Troubleshooting
No power
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Is the power cord properly connected?
(→ page 19)
No sound
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Is an instrument properly connected to the
INPUT jack?
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THR100HD:
Is the instrument connected to
the INPUT II jack? If only a single instrument
is being used, it must be connected to the
INPUT I jack.
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Is the instrument’s volume control turned up?
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Are the GAIN, MASTER, or VOLUME controls
set to “0”?
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Is the Amp Select switch properly set?
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Is the cabinet properly connected? (
→
page
16)
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If you have selected the CLEAN amp type, no
sound is produced if the tone controls are set
to “0”.
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Are a pair of headphones connected to the
PHONES jack?
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Is the cable used to connect the instrument to
the amp damaged?
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Is the cable used to connect the amp to the
cabinet damaged?
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Is the Effect Loop mode set to a serial
connection with the “THR HD_H Utility”?
In the serial connection mode, no sound is
produced if the loop is active without an effect
connected to the EFFECT LOOP SEND/
RETURN jacks. (→
page 21)
Stopped producing sound while
playing
1) The front grill lamp is not lit
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The thermal protection system has activated,
terminating output to the SPEAKER OUT jack.
Allow the amplifier to cool down then switch
the power ON again. If the thermal protection
system activates again, unplug the power cord
and contact the Yamaha dealer from whom
you purchased the device.
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The tip end of the speaker cable is grounded
or touched by static electricity causing a short.
Check the speaker cable and after eliminating
the cause, switch the power OFF and then ON
again. If the protection circuit activates again,
immediately turn the power OFF, disconnect
the power cord, and contact the Yamaha
dealer from whom you purchased the device.
2) The power is OFF
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The internal circuitry may not be functioning
properly. Immediately turn the power OFF,
disconnect the power cord, and contact the
Yamaha dealer from whom you purchased the
device.
Содержание THR100HD
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