求助：主马达不转

大头猪

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( h2 w7 k% `0 n$ o# ]- p, J# m新年捡了部SONY TC-580，遗憾的是主马达不转，经检测怀疑是转速控制电路故障。如如图加一个电阻，主马达会转，改变阻值便可改变马达转速，但转速很不稳。
控制转速的IC, SONY CX-032各脚电压值如图

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是IC坏了还是其它问题？如坏了，求着IC一块。谢谢！
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yjwu

有人走過相同的路了
  ]4 Q; \& k8 G' X+ F摘自   Obsolete Media - Forum

http://obsoletemedia.com/geeklog/forum/viewtopic.php?showtopic=2025
6 Q7 F+ Z7 B5 Y7 Vhttp://obsoletemedia.com/geeklog/forum/print.php?id=2025

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Chip CX-032B for Sony TC-558
1 k4 ^  x! Q  m, PPosted on: June 16 2008 @ 01:43 PM
# R) J0 F% T9 B- ABy: RODALCO

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Hi, did a quick Google and found this link on a German Forum regarding the CX-032B chip.

2 e1 I0 a1 O, m: M0 b6 _8 ]/ eLuckily I can read German and donor machines could also be a Sony TC 440 and Sony TC 580 which have the same chip.
A rare Sony turntable TTS 400 has the same chip used as well.
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The supllier on this link has the IC listed.
- D6 _. ^# p  f6 Ohttp://www.prelcoparts.com/sony.pdf                                             (沒有相關資料)

The German Bandmaschinen Forum thread.

5 W7 q; \. j$ U$ e5 t$ n% ~http://mb.abovenet.de/forum2/showtopic.php?threadid=7232      ( 聯結失效)
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Gru�, Raymond

; }5 s% U; m) H0 d8 P6 }Chip CX-032B for Sony TC-558Posted on: June 17 2008 @ 01:35 PM
( T8 T9 i6 u. m* I6 B9 @By: RODALCO

Content:
<b>visitorj</b>, can you make a photo of the IC and the board please ? and the schema if you have it?
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I got some of my Dutch R2R friends to have a look at it as well and with a bit of luck they can design a circuit with disrete components.
This will help all Sony R2R users in the near future as well as our machines age over time.
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Kind regards, Raymond
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5 z% j/ D" I* b1 t' Q) W! y& }- t8 s有沒有用零件做出等效的主軸控制還要進一步追蹤

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http://www.globalsemi.com/productdetails.aspx?itemno=875032100
39.99美元 似無存貨 必須從其他舊機器拆 不過可能也是相同的毛病    -->  設計的弱點

大头猪

谢谢！