求助：主马达不转

大头猪

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6 c, x' ?8 M) H0 q( Q" X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


是IC坏了还是其它问题？如坏了，求着IC一块。谢谢！

yjwu

; E4 w0 f% ?& m3 e9 [1 \有人走過相同的路了
% m  x' W1 w1 T4 ]* @6 `; M' ^3 @3 {, z摘自   Obsolete Media - Forum
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! w, J6 _& e; h" d, dhttp://obsoletemedia.com/geeklog/forum/viewtopic.php?showtopic=2025
, l/ Z. h+ e+ m) Q9 z) ?3 yhttp://obsoletemedia.com/geeklog/forum/print.php?id=2025

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Chip CX-032B for Sony TC-558
5 C- R' ~9 S0 ]5 h: \Posted on: June 16 2008 @ 01:43 PM
By: RODALCO
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Content:
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8 o( ^( D! q& ?" j( c( KHi, did a quick Google and found this link on a German Forum regarding the CX-032B chip.

9 Z9 K# M1 N+ p* C  _: \5 kLuckily 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.

8 b9 V  `9 O! |  lThe supllier on this link has the IC listed.
8 n# W2 A( S! ]) [  k& [http://www.prelcoparts.com/sony.pdf                                             (沒有相關資料)
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/ n0 @; Q" t$ ?* N0 wThe German Bandmaschinen Forum thread.
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& h- P# X) C8 ?3 Q* Y! mhttp://mb.abovenet.de/forum2/showtopic.php?threadid=7232      ( 聯結失效)
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5 E# Q( a. V+ v2 kGru�, Raymond
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Chip CX-032B for Sony TC-558Posted on: June 17 2008 @ 01:35 PM
8 t) s: h* h# a* U7 ?By: RODALCO
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Content:
9 V- a4 ^# g& @9 m0 ?9 s<b>visitorj</b>, can you make a photo of the IC and the board please ? and the schema if you have it?

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.
2 k5 Q$ \  r8 J. QThis will help all Sony R2R users in the near future as well as our machines age over time.
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: A/ o2 \8 Z6 v$ K# @& Q3 PKind regards, Raymond


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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零件追蹤
http://www.globalsemi.com/productdetails.aspx?itemno=875032100
* N: y. t# ]% @. m+ t3 n39.99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！