Onkyo-TSDX-494-Service-Manual 电路图 维修手册.pdf

《Onkyo-TSDX-494-Service-Manual 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Onkyo-TSDX-494-Service-Manual 电路图 维修手册.pdf（1页珍藏版）》请在收音机爱好者资料库上搜索。

1、Based On TX-DS494 Input selector IC. Analog source can be any of the available inputs found on the unit except multi-channel input. Left Right L/R Clock 12,288mz/256= 48khz L/R S/D L/R S/D S/D Analog signal processing method. In many of the receivers X701 is turned ON via control data, when source i

2、s analog same IC often is utilized to perform the base PLL frequency oscillation. L/R Clock 12,288mz/256= 48khz Q701 and its surrounding components very easily affected by to noise generated by power supply or excessive grounding of the unit to external devices. Always check and recheck power supply

3、 regulators for least ripple or H/F oscillation. Does not apply to US models Master Clock AK4526A Q801 DA/AD Converter Q801 must have M/C and Sampling frequency to work properly. M/C is generated by Q701 in most applications. The most critical parts of the DSP besides the Base frequency oscillators,

4、 are the Flash-Roms. These ROMs are often configured in an 8-bit data bus mode, A failing or loose DSP Flash ROMs could trigger, data error in which DSP may sound to break up and stutter do to mute ON-OFF. It may also mute indefinitely. It is recommended to check these components very closely before

5、 assuming otherwise. Pins labeled A0 and D0 are often same DC level. Most DSP design will incorporate a local DC to DC regulator. It extremely important to make sure the primary or secondary DC have no H/F oscillation. Left Right Page 1 Most DSP inputs are configured in a balanced input mode. RadioFans.CN 收音机爱 好者资料库