Onkyo-TXSR500-avr-sbSR500lfe01vid 电路图 维修手册.pdf

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1、ONKYO USA CORPORATION 18 P ark way, U pp er S ad dl e Ri v er, NJ 074 58 Title: TX-SR500B Date: 02/27/03 Classification: Mandatory Service Bulletin Ref #: SR500LFE-01-VID Solution:1) In some units improper software was used for System Control Microprocessor (Q7008). Follow the table to establish rem

2、edy only for those units having microprocessors considered having “No LFE (Mode-3)”. PN (Q7008)Description (Q7008)StatusMemo 22241765R3UPD784225GC-166GOODNeed Not Replace 22241842R3UPD784225GC-176No LFE (Mode-3)NLA 22241881R3UPD784225GC-183No LFE (Mode-3)NLA 22241957R3UPD784225GC-215GOODAvailable, S

3、upplied When addressing service for above described problem, check and confirm that the microprocessor Q7008 suffix is other than xx166 or xx215 and then proceed to replace. Proper SM component removal technique is expected. Solution:2) C203, C205, C211, and C215 must be changed from their current v

4、alue of 47uf or 100uf to 1000uf. Please refer to page #2 bulletin “TR500-SR500-VID” for solution. Symptom:1) In some units, LFE (SW Setting) Mode #3 may not have any out put when playing DD material. Symptom:2) In production lower value of capacitors were used on PCB NAVD-7422, locations C C203, C20

5、5, C211, and C215 that may cause Video jitter, Vertical roll and Video mute in TV-Monitors. Page 1 RadioFans.CN 收音机爱 好者资料库 Model: HTR-500, TX-SR500 Problem: In some rare occasions, some TV-Monitors may experience Video Mute, Unusable Signal and Vertical Jumping video conditions when S-Video and Vide

6、o is sent through receiver. Solution: Replace C203, C205, C211, and C215 with 1000uf 6.3v capacitors. Part Number 354721029. Ref: TR500-SR500-VID Application: Mandatory Service Bulletin Page 2 RadioFans.CN 收音机爱 好者资料库 Before C205 Changed Multi-Burst Wave Form After C205 Changed In HT-R500 a change in

7、 C205 from its current value 100uf16V capacitor to 1000/6.3V will help eliminate the ringing and jitter in video waveform. NOISE in video HT-R500 and TX-SR500 Disclosed information is only based on Composite Monitor Output. The change and modification will also apply to the S-Video Monitor Output as well. Page 3 RadioFans.CN 收音机爱 好者资料库