Troubleshooting
270 LS9-16/32 Owner’s Manual
Troubleshooting
Power does not turn on, panel LEDs
and the LCD display do not light
❍Are the LCD contrast and panel brightness adjusted appropriately? You can adjust the LCD contrast by
holding down the [HOME] key and turning the dial.
❍Is the LS9’s POWER switch turned on?
❍If the power still does not turn on, contact your Yamaha dealer.
Sound is not input
❍Is the optional I/O card installed correctly? (→ p. 44)
❍Is a signal being input from the external device?
❍Is the input port patched to an input channel? (→ p. 99)
❍Is the GAIN of the internal head amp or external head amp set to an appropriate level? (→ p. 47, 57)
❍Is the EQ attenuator raised? (→ p. 115)
❍Could insert be turned on even though it has not been specified correctly? (→ p. 101)
❍Is the [ON] key indicator of the input channel lit?
❍Is the fader of the input channel raised?
Sound is not output
❍Is the optional I/O card installed correctly? (→ p. 44)
❍Is the [ON] key indicator of the STEREO channel lit?
❍Is an output port patched to the output channel? (→ p. 95)
❍Could LCR be on, and the CSR value be set to 1.0? (→ p. 58)
Sound is not output from headphones
or the MONITOR OUT jacks ❍Is the [PHONES] knob or [LEVEL] knob set to an appropriate volume?
Sound is not loud enough
❍Is the GAIN of the internal head amp or external head amp set to an appropriate level? (→ p. 47, 57)
❍Is the fader of the input channel raised?
❍Could the EQ gain be set to an extremely low setting? (→ p. 115)
❍Could the GATE/COMP threshold or ratio be set to an extreme setting? (→ p. 117)
❍Is the EQ attenuator raised? (→ p. 115)
❍Is the fader of the output channel raised?
❍Try using the various screens of the METER function to check the levels. (→ p. 155)
Sound is distorted
❍Is the word clock set correctly? (→ p. 206)
❍Is the GAIN of the internal head amp or external head amp set to an appropriate level? (→ p. 47, 57)
❍Could the fader of the input channel be raised too high?
❍Could the fader of the STEREO channel be raised too high?
❍Could the EQ gain be set to an extremely high setting? (→ p. 115)
Sound is output even though it is not
patched to an output channel
❍Could you have assigned an input channel to direct out? (→ p. 103)
❍Could you have assigned an output channel as the insert out? (→ p. 101)
The volume of a specific channel rises
and falls ❍Could GATE/COMP be set to ducking? (→ p. 117)
Operating a fader does not control the
level as you expect ❍Is SENDS ON FADER selected and INPUT TO MIX FADER and so on active in the panel?
Only the sound of a specific channel is
heard from the MONITOR OUT or
PHONES jack
❍Could a [CUE] key be on?
Noise occurs from an externally
connected recorder or other device
❍Is the word clock set correctly? (→ p. 206)
❍Could the input signal be unsynchronized?
❍Could oscillator or talkback be turned on? (→ p. 151, 153)
High frequency range is attenuated
❍Could emphasis be applied? This problem will occur if the input signal status does not match the
emphasis data. (→ p. 206)
❍Could EQ be applied? (→ p. 115)
An input signal is being input, but
there’s no monitor output
❍Is the dimmer applied?
❍Is the MONITOR C assigned even though its output port has not been connected to external device.
Not enough headroom, especially
when EQ boost is applied ❍Use the EQ attenuator function to lower the level. (→ p. 115)
Signal is delayed ❍Check whether the delay setting for each channel is set correctly. (→ p. 95)
Turning a SELECTED SEND encoder
does not change the send level to the
MIX/MATRIX bus
❍Is the MIX/MATRIX turned on?
❍Is the MIX/MATRIX [ON] turned on?
❍Is the MIX bus set to VARI type? (→ p. 213)
❍If the send point is set to POST, could the fader have been lowered?
Can’t save scene memory or library
data ❍Are you attempting to save the data to a read-only scene/library or a protected scene? (→ p. 129)
Can’t save to USB memory
❍Is the USB memory protected?
❍Does the USB memory have enough free capacity to save the data?
❍When formatting the USB memory, format it in FAT32 or FAT16 format.
❍Could the recorder be playing back?
Can’t transmit/receive MIDI data
❍Is the MIDI PORT selected correctly? (→ p. 178)
❍Are the mode and channel selected correctly on the transmitting and receiving devices? (→ p. 178)
❍Has an event been assigned for the program change? (→ p. 180)
When you recall a scene, some
channels/parameters are not updated
❍Could that channel or parameter be set to Recall Safe? Could Focus be turned off in the scene you
recalled? Could user level restrictions have been specified? (→ p. 139, 140, 192)