
100 Corporate Drive Mahwah, NJ 07430 
           Service Bulletin 
No. : OST-C1437 
Date: October 28, 2008 
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Model: RCD-CX1    
Subject:  RCD-CX1 does not play a CD in "EVERY TIMER". 
Countermeasure is applicable only upon claim from the customer. 
Symptom: Step1: CD plays when becoming set time in the "EVERY TIMER" 
mode.  
Step2: CD is played by the "SLEEP TIMER" function.  
Step3: The power supply of the unit is turned on at the "EVERY TIMER" setting 
time. However, CD doesn't play. 
Solution:  We corrected the firmware so that no malfunction occurs. 
MODIFICATION: 
Replace the old Microprocessor with the improved new Microprocessor on "8UÂ210024 SYS/DAMP/DISP UNIT". 
______________________________________________________________________________________ 
The information contained in this document is intended for the exclusive use by DENON Authorized Service Centers and their 
employees. This document may contain information that is privileged, confidential and may be protected from disclosure under 
applicable laws and terms of the DENON Service Agreement. Any distribution, disclosure, dissemination or copying of this 
document and the information it contains is prohibited. No responsibility will be accepted by DENON for any damage, injury or loss 
resulting from the misuse of the information contained in this document. 
CONFIDENTIALITY NOTICE: 
 

Confirmation of the version: 
(1) Pull out the AC cable from the AC strip. (Turn the Power Supply of the unit 
off.)  
(2) Insert the AC cable into the AC strip while holding both "PLAY/PAUSE"  
button and "REV/-" button on the front panel simultaneously.  
(3) After 30 seconds, version of firmware will be indicated on FL Display. 
The version of the firmware: S1001030 
Parts: 
Ref# Description  Part Number 
IC302  CX1 SYSTEM ROM 
8R2411001030D 
ASSY 
Serial Number Range: 
We will apply the above modification to the production models at the following 
serial numbers. (Last 5-digits) 
00201 ~ 
______________________________________________________________________________________ 
The information contained in this document is intended for the exclusive use by DENON Authorized Service Centers and their 
employees. This document may contain information that is privileged, confidential and may be protected from disclosure under 
applicable laws and terms of the DENON Service Agreement. Any distribution, disclosure, dissemination or copying of this 
document and the information it contains is prohibited. No responsibility will be accepted by DENON for any damage, injury or loss 
resulting from the misuse of the information contained in this document. 
CONFIDENTIALITY NOTICE: