Onkyo-TXDS797-avr-sb020012 电路图 维修手册.pdf

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1、ONKYO USA CORPORATION Date 01/30/02 Must also Perform Bulletin 02002-3 For Dolby Digital Audio Drop Out. Procedure: In some units Q713 IC, brand ISSI, IS62LV1024LL-70H was used Fig1, where as in some NEC MPD441000LGU-B70X may be found. For those units using the ISSI SRAM and having the above aforeme

2、ntioned problem, you will need to replace the IC Q713 with PN#22241793R3 having NEC MPD441000LGU-B70X or Mitsubishi M5MV108DKV-70H brand label. If above part is to be replaced L753 need not be replaced. See Note. NOTE: For units having not developed such problem and has the ISSI IC in place, it is h

3、ighly recommended that L753 Fig2 be changed to 33 (PN#433223304R1) chip resistors and need not replace IC. * After service, please reset the unit following reset procedure. From a power ON state, press and hold Video-1 button and then press Stand-By switch. Unit will clear and shut down. Units not a

4、ffected by above changes are: SERVICE BULLETIN: 02001-2 Models: TX-DS797 / TX-DS898 Symptom:Static like Noise (tic, tic,) occurs when in surround mode with a limited possibility of Surround Back not functioning. Cause: Power Supply VCC for Q713 may be too high. Solution: Reduce VCC or Replace Q713.

5、Must Perform Bulletin 02002-2 For Dolby Digital Audio Drop Out as well. Fig1 Fig2 Mandatory: TX-DS797MDDSN#2210029801 TX-DS898MDDSN#2210022501 RadioFans.CN 收音机爱 好者资料库 ONKYO USA CORPORATION Date 02/20/03 * Please check if Service Bulletin 02001-2 is applicable or not. ModelLocationOld Part NumberNew

6、Part NumberNote: TX-DS595Q770122241572R322241572R3IC label 595 TX-DS696Q770122241570R322241570R3IC label 696 TX-DS797Q70222241458R322241458R3IC Label 898 TX-DS898Q70222241458R322241458R3IC Label 898 * In all above models the affected serial numbers are those manufactured prior to 2002. The second di

7、git from left identifies the production year. If the second digit from left is 2, then it needs modification. All having second digit 2 need not be modified as the issue has been addressed at the production stage. SERVICE BULLETIN: 02002-3 Models: TX-DS595, TX-DS696, TX-DS797, TX-DS898 Symptom:Audio

8、 Dropout when processing Dolby Digital signal input. For Example: Jurassic Park 3 and Pearl Harbor movie titles may play back intermittent in Dolby Digital Mode but OK in DTS mode. In some cases a consumer may claim to have problem processing Dolby Digital from SAT Dish receiver (Direct TV). Cause: Software Hardware (material) incompatible. Solution: Replace parts as per list below. Mandatory RadioFans.CN 收音机爱 好者资料库