求助：主马达不转

大头猪

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5 j1 V% G& v1 N: k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。
( _3 S& y: c" [8 |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

$ ?" e; h8 |+ W5 P+ ~* S( a有人走過相同的路了
$ O2 v' T6 i, [摘自   Obsolete Media - Forum
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http://obsoletemedia.com/geeklog/forum/viewtopic.php?showtopic=2025
http://obsoletemedia.com/geeklog/forum/print.php?id=2025
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Chip CX-032B for Sony TC-558
$ J2 g$ J- n- t2 SPosted on: June 16 2008 @ 01:43 PM
By: RODALCO
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* S2 P' e/ \" qContent:
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) F. [7 \+ y9 g3 Y6 e0 CHi, did a quick Google and found this link on a German Forum regarding the CX-032B chip.
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Luckily I can read German and donor machines could also be a Sony TC 440 and Sony TC 580 which have the same chip.
/ d- E( H2 ~4 y! fA rare Sony turntable TTS 400 has the same chip used as well.
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( H3 `6 p" A, `) y0 G; R' vThe supllier on this link has the IC listed.
# w- h- [/ c" Whttp://www.prelcoparts.com/sony.pdf                                             (沒有相關資料)

The German Bandmaschinen Forum thread.
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: P1 v/ W& w' i. P: ]1 q; q1 q- rhttp://mb.abovenet.de/forum2/showtopic.php?threadid=7232      ( 聯結失效)

Gru�, Raymond
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Chip CX-032B for Sony TC-558Posted on: June 17 2008 @ 01:35 PM
By: RODALCO
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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.
+ w; L1 i1 Z' Z* y+ ~This will help all Sony R2R users in the near future as well as our machines age over time.

0 D9 g1 s0 D- K/ a' \Kind regards, Raymond

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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
- I( b0 ?/ l" [- ^* y% ahttp://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
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大头猪

谢谢！