Operation
Playback may start automatically and tracks can be played, paused and navigated using the front panel or remote
control transport controls. For CD/DVD player, it may be necessary to press DVD ON/OFF.
A backlit LCD display shows the status and elapsed time of playback material.
Adjust the MASTER volume control to the required level for the playback and then balance with any auxiliary input.
Switch on wired microphones and gradually increase the WIRED MIC (or MIC1 and MIC2) volume controls whilst
testing the level of speech into the microphone through the speaker. For PPA74, repeat this process for the VHF
wireless microphones.
Adjust BASS and TREBLE controls to achieve the required tone characteristic for microphone and line inputs.
Adjust ECHO control to vary the amount of echo to be applied to microphone inputs for karaoke/vocalists.
Before powering down, it is advisable to turn the MASTER volume down to avoid a loud click when switching off.
Switch off wired and wireless microphones plugged into the unit and remove USB or SD/MMC card media.
Remove any CD or DVD media by pressing OPEN/CLOSE, removing disc and pressing OPEN/CLOSE again.
Press the POWER switch to power down. This will be then be the charging mode for the internal battery.
SPECIFICATIONS
Model
PPA72
PPA74
(Stock Code)
(170.127)
(170.125)
Power Supply
240Vac 50Hz and dual rechargeable 12V/5Ah batteries
Output power
70Wrms @ 4Ω
Microphone inputs
2 x 6.3mm jack
2 x 6.3mm jack + 2 x VHF wireless
VHF microphone power supply
N/A
9Vdc (PP3 battery) each
VHF microphone frequencies
N/A
173.8MHz + 174.8MHz
Aux Input
L + R RCA line input
Video outputs
Component, Composite, SVHS and VGA
Audio outputs
L+R line out, 5.1 surround, S/PDIF optical and coax
Multiple unit link
Active bus IN and OUT, 6.3mm jack
Disc Player
CD, CDR, CD+G and DVD playback
Digital Media Player
Compressed digital audio from USB pen drive or SD/MMC card
Charge time
8 hours
THD
<0.1%
Frequency response
50Hz - 20kHz (±3dB)
Dimensions (mm)
540 x 330 x 290mm
Weight
21.4kg
Troubleshooting
No LEDs lit on front panel
Ensure mains is connected properly or battery is charged
Check mains lead and supply voltage are correct
Battery “CHARGE” LED is lit
Unit is in re-charging mode
– switch power on to operate
Battery “LOW” LED is lit
Switch to mains power or switch off until battery is charged
No playback from CD or DVD
Check format is correct (will not play CDROM and some other types)
Press DVD ON/OFF button and use transport controls to check
USB/SD player will not play audio from media
(CM-LIVE models only)
Press PLAY on transport controls
Check memory device is connected properly (remove and re-insert)
Check file types
– standard compressed digital audio files required
Check memory device works on a PC or Mac for standard playback
No output from VHF microphones (PPA74 only)
Check batteries in handheld transmitters
Check handheld transmitters are switched on
Output is very quiet
Turn up MASTER and/or Microphone level controls
Check volume controls are not turned down on remote control
If Battery LOW LED is lit, switch to mains power or charge battery
Press L/R CHANNEL button to check karaoke output mode
Check for quiet recording of media files on USB/SD or CD
Output is very loud or distorted
Check level of input signal is not too high
Reduce Microphone level controls
Reduce MASTER level control
Ensure Hi-Z line level input(s) not connected via XLR
Check for high gain recording of media files on USB/SD or CD
Feedback (loud squealing or howling from mics)
Face the microphone away from the speaker
Reduce Microphone LEVEL control and ECHO control
Reduce MASTER volume control
Note: for further troubleshooting, refer equipment to qualified service personnel for testing
© qtx sound 2011
