Nakamichi MB-100 transistor burned - Need info

tomtomjr · 23rd April 2009, 05:44 AM

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.

tomtomjr · 28th April 2009, 03:18 AM

Anyone? Does anyone on here still have one that they could check their board? It is the main board in the disc section. Thanks...

Perry Babin · 28th April 2009, 10:51 AM

Shot in the dark:
http://www.rohm.com/products/databoo...f/dtc114ee.pdf
http://www.rohm.com/products/databoo...f/2sa1036k.pdf

I don't have the service manual.

MadMutt · 29th April 2009, 09:00 AM

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......

tomtomjr · 3rd May 2009, 06:29 PM

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...

23rd April 2009, 05:44 AM	#1
tomtomjr diyAudio Member Join Date: Feb 2008	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.

28th April 2009, 10:51 AM	#3
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Shot in the dark: http://www.rohm.com/products/databoo...f/dtc114ee.pdf http://www.rohm.com/products/databoo...f/2sa1036k.pdf I don't have the service manual. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Replacing burned out transistor	DeadSpeaker	Solid State	11	23rd January 2009 04:50 AM
Why Nakamichi use this configuration of output transistor	ostie01	Solid State	11	25th August 2006 08:49 PM
Nakamichi mb-4s , info/mods please	ocaukrell	Digital Source	0	30th December 2005 02:06 AM
Nakamichi PA302 setup info wanted	ocaukrell	Car Audio	0	5th November 2005 12:54 AM
Transistor info (2SK,2SJ...)	Voyager92	Solid State	1	17th April 2003 02:08 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

28th April 2009, 03:18 AM	#2
tomtomjr diyAudio Member Join Date: Feb 2008	Anyone? Does anyone on here still have one that they could check their board? It is the main board in the disc section. Thanks...

29th April 2009, 09:00 AM	#4
MadMutt diyAudio Member 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......

3rd May 2009, 06:29 PM	#5
tomtomjr diyAudio Member Join Date: Feb 2008	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...

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)