User Manual

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amplier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.