Denon-AVR1803-avr-si维修电路原理图.pdf

DENONDENON Service Information DENON, LTD. INTERNATIONAL SALES DIVISION REF. NO: OST-760 DATE: September 2003 1. MODEL: AVR-1403, AVR-1603 and AVR-1803, All E Models. (Refer to the page 3/3 for details.) 2. SUBJECT: Serial Numbers to which the countermeasure for the cracked P. W. Board has been applied upon production of the units. 3. SYMPTOM: In case of the AVR-1403 G1C, the pattern was disconnected due to a crack of the P. W. Board of the MINI TRANS section, and a failure occurred that the Power is not turned on. 4. CAUSE: The yield strength of the unit against the vibration and/or the drop was reduced due to an increase of the gap between the P. W. Board and the MINI TRANS and the weight of the MINI TRANS part than the former model. 5. COUNTERMEASURE: Upon production of the above models, we have applied the modification for preventing the crack of the P. W. Board to all the E models of AVR-1403, AVR-1603 and AVR-1803 whose structures of the MINI TRANS sections are the same as AVR-140 G1C. Contents of the Countermeasure: 1) We additionally attached cushions between the bottom chassis and the P. W. Board of the MINI TRANS section. 2) We fixed the leg section of the MINI TRANS section and the P. W. Board by using a Bond. 6. MODIFICATION: 1) Remove nine screws on the Top Cover. (3 on the left, 3 on the right and 3 on the rear of the Top Cover.) 2) Remove the P. W. Board and Back Panel from the bottom chassis together. Screws to be removed are as follows: Remove two screws on the bottom. (Under the Heat-sink.) Remove four screws on the edge of the Back Panel. Remove eleven screws that are fixing the P. W. Board on the bottom chassis. (On the right of the Heat-sink: 5 screws. On the left side: 6 screws.) OST-760 Page 1/3 Z03-074 RadioFans.CN 收音机爱 好者资料库 3) Attach the Cushion (963 0099 709) on the pattern side of the P. W. Board of the MINI TRANS. (Fig. 1) 4) Apply Bond (SC608Z) to the leg portions of the MINI TRANS to fix the legs on the P. W. Board. (Fig. 2) Modification part. Part Number Part Name ETR Part Number 963 0099 709 Cushion 4050-21040-500-0 Pattern side of the MAIN P. W. Board. Fig. 1 Fig. 2 Fix the legs on the four corners with Bond. OST-760 Page 2/3 Z03-074 RadioFans.CN 收音机爱 好者资料库 6. APPLICATION OF THE MODIFICATION TO THE PRODUCTION MODELS: We have applied the above modification to the production models commencing from the following serial numbers. Model Serial Number AVR-483 BKEU 3xx3305601 AVR-483 G1C 3033302101 AVR-1403 G1C 3033302300 AVR-1403 KE2 3xx3306661 AVR-1403 KE3 3033317601 AVR-683 BKEU 3xx3311401 AVR-1603 G1C 3033330360 AVR-1603 G1H 3053301501 AVR-1603 G1K 3043300901 AVR-1603 G1T 3043300901 AVR-1603 GE1 3033305101 AVR-1603 KE2 3033322551 AVR-1603 KE3 3033324101 AVR-1603 KEA 3xx3304501 AVR-1603 KEK 3xx3301801 AVR-883 BKEU 3053304501 AVR-1803 G1C 3033302801 AVR-1803 G1H 3043301701 AVR-1803 G1K 3043300901 AVR-1803 G1T 3043301201 AVR-1803 GE1 3033302101 AVR-1803 GE2 3043316001 AVR-1803 KE2 3043319501 AVR-1803 KE3 3043335501 AVR-1803 KEK 3063301301 OST-760 Page 3/3 Z03-074