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Poly Planar LLC 520 McCormick Dr. Glen Burnie MD. 21061 410-761-4000 

www.polyplanar.com 

the switch to the desired position. (Power must be removed from the radio, or the reset 
switch must be pressed before the new frequency mode is activated.) 

 

Special Controls for CD Operation 

Intro scan, random, repeat: 

Press the 'INTRO' (preset 1) to enter intro-scan mode. 'SCN' will appear at the left of 
the display. The first 10 seconds of each track on the CD will play continuously until 
you press the INTRO button a second time or the TUNE/SEEK UP or DOWN button. 
Press and hold “INTRO” to scan Albums on an MP3 disc. Unit will display “DCN”. 
 
Press the 'RANDOM' (preset 2) to play the tracks of the CD in random order. 'RDM' will 
appear at the left of the display. 
Press and hold 'RANDOM' to play MP3 tracks and albums in random order. Unit will 
display “DDM”. 
 
Press the 'REPEAT' (preset 3) to repeat the current track. 'RPT' will appear at the left 
of the display. 
Press and hold ' REPEAT ' 

to repeat the current album. Unit will display “DPT”. 

 
Press 

║ (preset 4 ) to alternately  pause and play the CD. 

 
Press Album +/- (presets 5 & 6) to change Album/Folders on MP3 & WMA CD-ROM 
discs. 
 

Using the Optional CD Changer 

Playing a CD: 

Press the SOURCE button to select the CD Changer. 'CDC' will appear at the left of 
the display. The main display will indicate 'CD-X' where X is 1 to 6, the currently 
playing CD.  
 
If no magazine is inserted in the player then the word 'eject' will appear in the display If 
no CDs are in the magazine, then 'NO DISC' will appear in the display 

 

CD-ROM Play Sequence 

The MRD-70 will play MP3 and WMA audio files. The MRD-70 will ignore files that do 
not end in “.mp3” or “.wma”. 
Also,  all  folders  will  be  assigned  a  number  in  order  of  play.  If  a  folder  does  not  have 
music files in it, it

’s number will be skipped when pressing the Album +/- keys. 

 
The order of play is as follows:  
The  top  level  songs  will  be  played  first  in  alphabetical  order  and  “Album  00”  will  be 
displayed  as  the  Album/Folder.  The  contents  of  the  folders/albums  will  be  played  in 
alphabetical order as shown in the chart shown on next page. 

Summary of Contents for MRD-70

Page 1: ...hat also functions as a network audio source with Poly Planar s other audio network products Features AM FM CD CD R CD RW MP3 Source Unit Sealed chassis optimized for wet environments Anti skip memory...

Page 2: ...Poly Planar LLC 520 McCormick Dr Glen Burnie MD 21061 410 761 4000 www polyplanar com 2 Controls and Connections Eject CD Reset Latch Line Out DIN Cable Speakers Power Auxiliary Inputs Antenna...

Page 3: ...t this wire to a switched 12V source such as an ignition or accessory switch This connection must be able to supply 7amps of current Yellow Wire Connect this wire to a constant 12V source This retains...

Page 4: ...duits The blue connector cap ends can be discarded if a smaller diameter is required such as a Pod mount Use shrink tube to seal the connections Connector cap ends removed Before drilling holes for ca...

Page 5: ...Scan 2 Intercom Switch 11 Audio Controls 3 Presets 1 6 12 Audio Source Select 4 Display Options 13 Power On Off 5 Tune Track Up 14 Mute 6 Tune Track Down 15 Amplifier Source Select 7 AM FM Band Preset...

Page 6: ...tercom volume up or down See Volume 9 The Master zone intercom volume is set using a potentiometer on the RT 20 Router See RT 20 Instructions 3 Presets Tune to a desired AM FM or Satellite Radio optio...

Page 7: ...an through the preset stations and press again to stop the scan Press and hold to automatically assign presets to the current bank starting with the next station found 11 Audio Controls Pressing this...

Page 8: ...reached release the button The unit remains in manual tune for 3 seconds after the button is released so you can still fine tune with additional button presses After 3 seconds the seek mode is re enab...

Page 9: ...Press and hold REPEAT to repeat the current album Unit will display DPT Press preset 4 to alternately pause and play the CD Press Album presets 5 6 to change Album Folders on MP3 WMA CD ROM discs Usi...

Page 10: ...l 100 3 Stereo FM1 P1 Vol 15 Frequency Band Preset Bank Preset Stereo Signal Present Volume Level AM FM Tuner Screen Trk 07 4m 49s CD Vol 15 Track Elapsed Time Volume Level CD Player Screen Aux Input...

Page 11: ...r voltage too low or too high 3 Input signal level too high Turn down 4 Power wire gauge too small Use at least 14AWG wire Low Bass Output Speakers are wired out of phase Check polarity of wires to th...

Page 12: ...C Idle Current no signal 10 mA Maximum current draw full power 7 A Remote wire current 4 mA WARRANTY Poly Planar marine audio systems are warranted to be free of defects in materials and workmanship f...

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