Kenwood DPX-502U Fascicule

•  This document describes the procedure and precautions for upgrading the 

CD/USB receiver fi rmware.

•  If an error occurs while you are updating the fi rmware, the CD/USB receiver may 

become unusable. Be sure to read the following procedure and precautions 
carefully before updating the fi rmware.

This updater cab be used to update the fi rmware of the CD/USB Receiver.
Target models are grouped as follows by the diff erence of fi rmware version.

<Model group A>

  KDC-MP435U, KDC-X491, KDC-W4737U,  KDC-W4737UY, KDC-MP4036U,

KDC-MP535U, KDC-X591, KDC-W6537U, KDC-W6537UY, KDC-MP5036U, DPX502, 
DPX502U, DPX502UY, DPX-MP5100U, DPX-U77, U525, KDC-MP7080U, 
KDC-MP8080U

<Model group B>

  KDC-W4537UA, KDC-W4537UG, KDC-W4537UAY, KDC-W4537UGY, KDC-MP436U

<Model group C>

  KDC-MP735U, KDC-X791, KDC-X891, KDC-W7537U, KDC-W7537UY, KDC-X7006U, 

KDC-X8006U, U727, KDC-MP9080U

<Model group D>

  KDC-X991, KDC-W9537U, KDC-W9537UY, KDC-X9006U, U929

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•  The update procedure diff ers for each model group.

This updater can be used to update the following fi rmware versions:

<Model group A, B, C>

  Ver 02.71 or earlier

<Model group D>

  Ver 04.10 or earlier
Refer to “Checking the Firmware Version” below for information on how to check 
the fi rmware version.
By executing this updater, the fi rmware version will become “Ver 02.72” for Model 
group A, B, C or “Ver 04.13” for Model group D.

<Model group A, B, C>

  Program name (size): player01.rom (Approx. 820KB)

<Model group D>

  Program name (size) : player02.rom (Approx. 980KB)

Create the update media on your PC.
1.  Download player01.rom or player02.rom to your PC and copy it to the top 

directory of the USB device.

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•  Be sure to copy player01.rom/player02.rom to the top directory of the USB 

device. Update cannot be performed if it is copied inside a folder.

<Model group A&B>

1.  Press the [SRC] and select “STANDBY” (Standby mode).
2.  Press the [MENU] button to enter the menu mode.
3.  Press the control knob up/down to select the menu item “F/W VER”.
4.  Pressing the control knob left or right, displays the fi rmware version.

<Model group C&D>

1.  Press the [SRC] and select “STANDBY” (Standby mode).
2.  Press the [FNC] button to enter the function control mode.
3.  Turn the control knob to display “MENU” and then press.
4.  Turning the control knob and selecting “F/W Version” displays the fi rmware 

version.

<Model group A&B>

1.  Connect the “Update Media” to the CD/USB receiver.
2.  When the audio fi le starts playing or “NO MUSIC” appears, press the [MENU] 

button to enter menu mode.

3.  Press the control knob up/down and select “F/W UP”.
4.  Press the control knob for at least 1 second to start the update.
  “UPDATING” appears during update and “COMPLETE” appears when complete. It 

takes approximately 40 seconds to load the updater.

5.  When audio fi le starts playing or “NO MUSIC” appears once more, refer to 

“Checking the Firmware Version” above and check that fi rmware version “VER 
2.72” or “VER 4.13” is displayed.

<Model group C&D>

1.  Connect the “Update Media” to the CD/USB receiver.
2.  When the audio fi le starts playing or “No Music Data” appears, press the [FNC] 

button to enter function control mode.

3.  Turn the control knob to display “MENU” and then press.
4.  Press the control knob up/down to display “F/W Update” and then press. 

“UPDATING?  NO/YES” appears.

5.  Press the control knob to the right to select “YES” and then press to start the 

update.

  “Updating” appears during update and “Complete” appears when complete. It 

takes approximately 40 seconds to load the updater.

6.  When audio fi le starts playing or “No Music Data” appears once more, refer to 

“Checking the Firmware Version” above and check that the fi rmware version “F/
W Version: 2.72” or “F/W Version: 4.13” is displayed.

•  USB memory is recommended as the update media.
•  Update cannot be performed to a CD media.
•  When using an digital audio player to perform update, be sure to set the player 

to MSD (mass storage device) mode. Player that cannot be set to MSD mode 
cannot be used for update.

•  Update may not be possible with some multicard reader and memory card 

combination.

•  The fi rmware updater may be used by copying it to a device containing audio 

fi les.

•  Be sure to park the vehicle in a safe place before updating. Keep the engine 

running in order to prevent battery from running out.

  Do not turn off  the engine or CD/USB receiver power, or remove the USB 

device while updating. Update cannot be performed correctly and the CD/USB 
receiver may become unusable.

CDUSB_R_FWverup_en