Troubleshooting; Specifications; Karaoke - Yamaha KPA-502 Owner's Manual

If this unit functions abnormally during operation, first check the following items. If the unit continues to function abnormally, or
if an abnormality occurs other than those listed below, switch off the unit's power and disconnect the AC plug, and then
consult your authorized YAMAHA dealer or servicing personnel.
SYMPTOM
Your voice is not heard
through the microphone.
The volume of the original
vocals cannot be reduced
even when the MPX
BALANCE control is turned to
the MUSIC side.
Your voice cannot replace the
original vocals even when the
ONE TOUCH KARAOKE
button is pressed.
The sound of the playback
source is not heard.
It happens that this unit does
not work normally
NOTE:
When the unit fails to operate normally because of some reasons, turn the power on and off by pressing the POWER button.
The microcomputer inside the unit is reset through this procedure.
<Audio>
Minimum RMS Output Power per Channel ..... 75W + 75W
(0.05% THD, 20Hz~20kHz, 6 ohms, both channels driven)
Rated Output RMS Power (EIAJ) ................. 100W + 100W
Input Sensitivity/Impedance
MIC ........................................................ 1.0 mV/30 kohms
VCD/LD, TAPE, AUX ............................. 150 mV/50 kohms
Output Level/Impedance (Input Level: 150 mV)
PRE OUT ....................................................... 1 V/1 kohms
REC OUT ................................................ 150 mV/1 kohms
Music Tone Control Characteristic
BASS (Boost/Cut) ............................ +9 dB/–9 dB (50 Hz)
TREBLE (Boost/Cut) ...................... +8 dB/–8 dB (10 kHz)
<Video>
Video Input Level/Impedance
VCD/LD, AUX ......................................... 1 Vp-p/75 ohms
Video Output Level/Impedance
MONITOR 1, 2 ......................................... 1Vp-p/75 ohms
12

TROUBLESHOOTING

POSSIBLE CAUSE
Microphone plug is not firmly inserted
to the jack.
Microphone is turned off.
The MIC LEVEL is set to MIN
The MPX/STEREO button is not set
properly.
The volume level of the microphone
is low.
The singing voice level is not loud
enough.
The INPUT selector is not set
properly.
There is an influence of strong
external noise (lightning, excessive
static electricity, etc.) or a
misoperation was performed while
using this unit.

SPECIFICATIONS

Insert firmly.
Turn on the power of the microphone.
Set the MIC LEVEL to an appropriate level.
With sound multiplex sources, set the MPX/
STEREO button to on. (The indicator lights.)
Turn up the volume of the microphone with the
MIC LEVEL control.
Sing louder.
Set it to the source to be played.
Turn this unit power off and disconnect the AC
power from the AC outlet. After about 30
seconds have passed, connect the power and
try again.
<General and China model>
Power Supply .................. AC 110/120/220/240 V, 50/60 Hz
Power Consumption ................................................. 145 W
AC Outlet (2 UNSWITCHED OUTLETS) ... 100 W max. total
(U.S.A. model)
Power Supply ............................................ AC 120 V, 60 Hz
Power Consumption ................................................. 140 W
AC Outlet (2 UNSWITCHED OUTLETS) ... 100 W max. total
(Singapore model)
Power Supply ............................................ AC 230 V, 50 Hz
Power Consumption ................................................. 145 W
AC Outlet (2 UNSWITCHED OUTLETS) ... 100 W max. total
Dimensions (W x H x D) ...................... 420 x 141 x 434 mm
Weight ...................................................................... 10.4 kg
Specifications are subject to change without notice.
REMEDY