User Manual

23
Troubleshooting
No power
l
Is the power cord properly connected?
(→page19)
No sound
l
Is an instrument properly connected to the
INPUTjack?
l
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.
l
Istheinstrument’svolumecontrolturnedup?
l
AretheGAIN,MASTER,orVOLUMEcontrols
set to “0”?
l
Is the Amp Select switch properly set?
l
Is the cabinet properly connected? (→ page
16)
l
 IfyouhaveselectedtheCLEANamptype,no
sound is produced if the tone controls are set
to “0”.
l
Are a pair of headphones connected to the
PHONESjack?
l
Is the cable used to connect the instrument to
the amp damaged?
l
Is the cable used to connect the amp to the
cabinet damaged?
l
IstheFXLOOPfootswitchONwithoutan
external effector connected to the EFFECT
LOOPSEND/RETURNjacks?(→ page 21)
Stopped producing sound while
playing
1) The front grill lamp is not lit
l
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.
l
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
l
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.