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Transistors for Hitachi HMA 7500 amplifier

Looking for replacment parts

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Hi,
you can download the service manual with this link:
HITACHI HMA 7500 MK II SM 1 Service Manual free download schematics...
In the document there is a schematic diagram also and you will see what type transistors are used by the device so you can find the replacement possibilities.
Thanks
gylacz

Posted on Apr 01, 2014

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Posted on Jan 02, 2017

  • 54 Answers

SOURCE: parts replacements

This is straight from the 1989 Japanese Transistor Substitution Manual.......

2SA 1011--------use 2SB 1085 A, made by Rohm

2SC2344---------use 2SD 1562A, made by Rohm

Good luck...Rob

Posted on Mar 03, 2008

  • 7 Answers

SOURCE: Studiomaster 900E power transitors

read through this thread and you should be able to get a schematic

http://www.diyaudio.com/forums/showthread.php?threadid=140776

Posted on Jun 17, 2009

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hi zm_16dec,

Right chanel fully dead , output transistor burnedout ,

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all i can advise is to replace the unknown part number of

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itself.


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Parts replacements


This is straight from the 1989 Japanese Transistor Substitution Manual.......

2SA 1011--------use 2SB 1085 A, made by Rohm

2SC2344---------use 2SD 1562A, made by Rohm

Good luck...Rob

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