求助：主马达不转

大头猪

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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。
9 X2 `2 N: U8 ?% h; ~6 C控制转速的IC, SONY CX-032各脚电压值如图


8 i0 V- x* g% a7 J# T; i" O+ }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
8 n3 G5 T' {6 y2 F! y: U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
Posted on: June 16 2008 @ 01:43 PM
By: RODALCO
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1 \; A. U& N. z% Y: J" NContent:

; o, o: w) @( m( y0 |9 D. \( _8 `# |, gHi, did a quick Google and found this link on a German Forum regarding the CX-032B chip.
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1 Q' j+ g9 P3 k" p' WLuckily I can read German and donor machines could also be a Sony TC 440 and Sony TC 580 which have the same chip.
5 l; y* M$ D4 r' N8 Q0 N& wA rare Sony turntable TTS 400 has the same chip used as well.
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0 S3 U% O6 g! L. YThe supllier on this link has the IC listed.
http://www.prelcoparts.com/sony.pdf                                             (沒有相關資料)
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The German Bandmaschinen Forum thread.
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  ^$ V. s% l9 xhttp://mb.abovenet.de/forum2/showtopic.php?threadid=7232      ( 聯結失效)
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5 v) s( h, ?" [/ ?4 R( i# z8 _Gru�, Raymond

Chip CX-032B for Sony TC-558Posted on: June 17 2008 @ 01:35 PM
1 }$ s! f! D: p" s+ U: N( eBy: RODALCO
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% Y$ {/ M2 G7 `# _Content:
<b>visitorj</b>, can you make a photo of the IC and the board please ? and the schema if you have it?

( l! Z2 V2 t+ y8 n% X$ m) S( nI 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.
& q% b: D3 s2 x" u, ~$ cThis will help all Sony R2R users in the near future as well as our machines age over time.

9 E- ^$ D! F1 \+ F0 j: V; x, cKind regards, Raymond

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- b7 O& w- ]( z, F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
+ {% N0 d& \0 V* `+ {  a, Vhttp://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！