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SFT-1的CD机怎么接田兄的同轴板?

田兄,原來SFT-1的PCB需要大改嗎?
謝謝!
不知田兄有冇SFT-1的線路?
應是CDT,因SFT-1沒有解碼部分。
小弟没有这个机器的线路图哦。
小弟没有这个机器的线路图哦。
田雨 发表于 2011-3-1 13:47
有空照个像,板上好像就几颗IC,估計不是很复杂。(下面照片是n年前拍的,穩约看见有四只cmos IC,其中有一只是负责振蕩的)
SONIC2.JPG
找DSP那颗IC,然后按其PDF找到数字输出脚和晶振输入脚就可以了。
左上兩黃色是輸出牛,左--单出,右--平衡出。兩黃色右边ic是光出用的。
网上杪來的:
Sonic Frontiers SFT-1    1993     1996 Now a brand absorbed into Anthem AV, Sonic Frontiers started as a high-end parts distributor in 1987 : Wima, Vishay, WBT, Gold Aero, Cardas, ALPS et al.
The transition from parts supplier to manufacturer happened in the 1987, first as kits (SFM-75) then as factory built - with much success ahead.

The SFT-1 was SF's first CD player, built to exacting standards for stable readout and very low jitter replay : 16.9344MHz clock placed right next to the Philips CDM-12.4 drive and over-beefy and regulated power-supplies with two potted toroidal transformers.
The top cover is damped with a sorbothane sheet ; three silicone rings soften vibrations of the mechanism.

Outputs comprise S/PDIF (Sony/Philips Digital Interface) in s-e coaxial and BNC, balanced AES/EBU and Hewlett Packard glass optical ST.
UltraAnalog chips work on the servos alongwith an Intel 8082. Laser control is done by two Philips TDA-7073 and a Philips SAA-7345.
As measured by UnltraAnalog's jitter analyzer, the internal jitter of the SFT-1 is of only 2 picoseconds between 100Hz and 40Khz, increasing to 10 picoseconds once at the digital outputs.

The only problem (today) is the center of the SFT-1 : the CDM-12.4 mechanism. If greatly integrated and very cheap to produce, this drive proved however far less reliable than the "old" CDM-0, -1 and -4... and was recently even difficult to find.
找DSP那颗IC,然后按其PDF找到数字输出脚和晶振输入脚就可以了。
田雨 发表于 2011-3-1 16:37
是SAA7345嗎?
SAA7345就好办了,2脚是数字输出脚,接同轴板的DIN,13脚是时钟输入脚,接同轴板的CLKO。
SAA7345就好办了,2脚是数字输出脚,接同轴板的DIN,13脚是时钟输入脚,接同轴板的CLKO。
田雨 发表于 2011-3-1 17:14
大概這樣,下一步看怎么樣實際去改。
田兄這板有線路圖可看?
Image00000.gif
2011-3-2 11:28
13# 田雨
太好了!謝謝田兄!
田兄,原來CDT的晶振是否要讓它不工作?具體是怎么做的?
原来的晶振要拆掉,从同轴板上的CLKO接回CDT的原晶振输入端。
原来的晶振要拆掉,从同轴板上的CLKO接回CDT的原晶振输入端。
田雨 发表于 2011-3-5 17:02
謝謝田兄!
我想把spdif之VCC斷開,較容易處理。
經過一番折騰,成功把CDT改造出來!
恭喜
恭喜
田雨 发表于 2011-3-6 10:25
正如您說:一番捣乱之后,声音的改变是正面的。
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