求助：主马达不转

大头猪

& ~  w  f3 n: Q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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6 A4 C8 R: U, a% {& o是IC坏了还是其它问题？如坏了，求着IC一块。谢谢！

yjwu

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有人走過相同的路了
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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4 E- d9 c' R- T1 |Chip CX-032B for Sony TC-558
5 I3 _2 D# h6 i  X: V+ u. U0 N5 ^Posted on: June 16 2008 @ 01:43 PM
By: RODALCO

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8 r7 p$ x6 B3 _/ XHi, 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.
: L' t$ @7 N$ A! ^5 u! `$ C" P9 o9 s% LA rare Sony turntable TTS 400 has the same chip used as well.

The 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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http://mb.abovenet.de/forum2/showtopic.php?threadid=7232      ( 聯結失效)

Gru�, Raymond

Chip CX-032B for Sony TC-558Posted on: June 17 2008 @ 01:35 PM
By: RODALCO
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, x+ Y0 P( U8 D. J+ ?3 Q<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.
3 Q; |4 n# f7 h- V6 ?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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零件追蹤
9 F* Y% O2 F, V' `8 X$ x! ]http://www.globalsemi.com/productdetails.aspx?itemno=875032100
( K$ G* H5 k  n0 ~; U: _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！