Nakamichi MB-100 transistor burned - Need info - diyAudio
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Old 23rd April 2009, 05:44 AM   #1
diyAudio Member
Join Date: Feb 2008
Default Nakamichi MB-100 transistor burned - Need info

I have an MB-100 in that I need some info on. I have seen a few posts on here with others that have worked on them. I have a bad transistor. Possibly 2. (only a faint sound coming out of the output RCA's) ... Here is what I am looking for Q401 and Q402 ... I have 24-52 on one trans and the other one has a **-51 . Can't read what is on there since it has a burn mark. Anyone have a board for one they can look at, or possibly a schematic? Perry? Anyone? Maybe I am stretching here, but anyone possibly have these transistors in stock? See pic below. Thanks in advance.

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Old 28th April 2009, 03:18 AM   #2
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Anyone? Does anyone on here still have one that they could check their board? It is the main board in the disc section. Thanks...
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Old 28th April 2009, 10:51 AM   #3
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Location: Louisiana
Shot in the dark:

I don't have the service manual.
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Old 29th April 2009, 09:00 AM   #4
MadMutt is offline MadMutt  Australia
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Join Date: Nov 2006
From nak mb75 service manual.

desig, part no, description
Q401, 0k10030a, tr, 2sa1036k-r
Q402, 0b14011a, tr, dtc114ek

And i'd suggest fixing those leaking caps too.
Although by the looks of the plate through holes it may be too late......
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Old 3rd May 2009, 06:29 PM   #5
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Thanks for the help. I appreciate it. Now on the hunt to find the transistors. Forums sure make it a lot easier than the old way of guessing, or waiting forever of getting a schematic from the mfr...
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