Luxman A373 - D375 - T353 Integr. Amp - CD - FM-Tuner - diyAudio
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Old 26th July 2011, 09:04 AM   #1
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Default Luxman A373 - D375 - T353 Integr. Amp - CD - FM-Tuner

For this Luxman hifi system I need a new MCU for each component.
The type No are follow:

1) Integrated Amplifier "A-373": TMP47C860N-G091
(TMP-47C860N-G091) Toshiba

2) Compact disc player "D-375": HD404729877S-35096WO3 (HD-404729877S-35096WO3) Hitachi

3) Stereo FM Tuner "T-353": TMP47C862AN-P527
(TMP47C862AN-P527) Toshiba

All parts are no longer available. Thus I am looking for other possibilities.

First possibility is to find out other models and brands with the same MCU's and same firmware.
Perhaps one of you know any models (most important is the amplifier).
Second possibility is to buy universal MCU's without firmware for own programming and additional the genuine Luxman firmware.
Who know appropriate delivery sources and suppliers for this?

BTW - the last is a general problem by much more other old audio components and therefore I think, there are some special company for offer this.

Thank you very much for your advices.
Attached Images
File Type: jpg luxman A373 front.jpg (70.8 KB, 186 views)
File Type: jpeg Luxman D375 front.jpeg (41.3 KB, 178 views)
File Type: jpg Luxman T353 front.jpeg.jpg (42.0 KB, 176 views)

Last edited by tiefbassuebertr; 26th July 2011 at 09:14 AM.
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Old 1st August 2011, 05:57 AM   #2
routhun is offline routhun  United States
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Default Luxman R-341 has same MCU as A-373

Hi tiefbassuebertr,

I guess this may be of some help to you. Luxman R-341 (possibly R-351) receiver has the same MCU - TMP47C860N, but I am not sure of the firmware in it. Usually these receivers go for cheap on Ebay (at least in US), it can be your source for this MCU. Otherwise, IMHO, it is too much hassle to make it work with general MCU. I do recall someone replaced a broken MCU in his Telefunken receiver (80s or 90s Japanese design) with some PIC controller. Need to search the internet.

Best of Luck,
Routhu
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Old 4th August 2011, 11:52 AM   #3
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Thank you for the advice of your keywords in this matter - I think you mean this URL:
http://john.ccac.rwth-aachen.de:8000/misc/rt200rep/
Good paper in case of such problems in general.
Concerning the mentioned Luxman devices I will also check your mentioned receiver models so as the Amp A371.
I would like to know all exist models of the Luxman series R-T-D-A 3xx.
By the Luxman heritage site this series isn't completly mentioned.
Attached Images
File Type: jpg Luxman A371.jpg (16.7 KB, 147 views)
File Type: jpg Luxman A373.jpg (45.2 KB, 143 views)
File Type: jpg Luxman R-341.jpg (16.4 KB, 12 views)
File Type: jpg Luxman R-351.jpg (524.0 KB, 13 views)

Last edited by tiefbassuebertr; 4th August 2011 at 11:59 AM.
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Old 23rd September 2011, 01:26 PM   #4
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The repair work was finished by the models A373 and T353 (I have found devices of the same models but in optical worse condition).
I replaced the internal stuff against each other.
For the D375 I have purchase a MCU as replacement part.
Before I perform the replacing, I need the schematic of this part.
Voltage are all correct after replace the regulators, but I don't understand, how the st-by control unit works.
Who can post the schematic of the D375 ?
Here are more models in the outline of D375, but completly other internal chip-sets
Attached Images
File Type: jpg Luxman D321 front.jpg (18.6 KB, 11 views)
File Type: jpg Luxman d322 black front.jpg (15.0 KB, 8 views)
File Type: jpg Luxman D322+A353 front.jpg (157.5 KB, 10 views)
File Type: jpg Luxman D351-A371.jpg (21.0 KB, 12 views)
File Type: jpg Luxman D355 front.jpg (23.5 KB, 9 views)
File Type: jpg Luxman D357 front.jpg (47.2 KB, 4 views)
File Type: jpg Luxman D357 HOPM3 mechanism.jpg (81.1 KB, 25 views)
File Type: jpg Luxman D373 front.jpg (18.3 KB, 21 views)
File Type: jpg Luxman D373 front-II.jpg (31.3 KB, 3 views)

Last edited by tiefbassuebertr; 23rd September 2011 at 01:37 PM.
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Old 23rd September 2011, 01:41 PM   #5
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and various additional images of the integrated amps from this outline series:
Attached Images
File Type: jpg luxman A353 black front high res.jpg (729.3 KB, 8 views)
File Type: jpg Luxman A357 - D375 front.jpg (84.7 KB, 7 views)
File Type: jpg luxman A377 front black.jpg (30.7 KB, 5 views)
File Type: jpg luxman A377 front.jpg (27.5 KB, 4 views)
File Type: jpg luxman A377 open top.jpg (72.5 KB, 27 views)
File Type: jpg luxman A377 stby PCB.jpg (59.9 KB, 29 views)
File Type: jpg luxman A383 front black.jpg (37.6 KB, 17 views)
File Type: jpg luxman A383 front.jpg (123.8 KB, 10 views)
File Type: jpg luxman A383 top open.jpg (57.3 KB, 28 views)
File Type: jpg Luxman A388 front.jpg (85.2 KB, 29 views)
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Old 23rd September 2011, 01:43 PM   #6
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there are also preamplifiers and power amps in this outline:
Attached Images
File Type: jpg Luxman M375-C383 front.jpg (102.1 KB, 20 views)
File Type: jpg Luxman M375-C383 rear.jpg (120.4 KB, 16 views)
File Type: jpg Luxman M383 front.jpg (46.7 KB, 11 views)
File Type: jpg Luxman M383-C383-T351 front.jpg (46.4 KB, 10 views)
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Old 25th March 2012, 11:12 AM   #7
retrex is offline retrex  United States
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I have a like new D375, can I be of help?
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Old 25th March 2012, 12:10 PM   #8
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Quote:
Originally Posted by retrex View Post
I have a like new D375, can I be of help?
I wonder, why at pin 16 ("Power ON") from the replaced MCU isn't to observed any activity after pressing the "ON" botton.
Thus the cd player remains in the stand by mode. Display is death.
The voltages from the power supply are all resent in the right value. The PIN "OSC1" works - i. e. MCK is present.

How can I prove whether the new MCU is defective again, or whether the error is outside of the MCU ??

HD404729 datasheet and application note, data sheet, circuit, pdf, cross reference, pinout | Datasheet Archive
Attached Images
File Type: jpg Luxman D375 img215.jpg (412.0 KB, 39 views)
File Type: jpg Luxman D375 img216.jpg (359.8 KB, 36 views)
File Type: jpg Luxman D375-I.jpg (147.5 KB, 23 views)
File Type: jpg Luxman D375-Ii.jpg (415.8 KB, 21 views)
File Type: jpg Luxman D375-iiI.jpg (496.1 KB, 25 views)
File Type: jpg Luxman D375-IV.jpg (371.5 KB, 23 views)
File Type: jpg Luxman D375-V.jpg (587.4 KB, 19 views)

Last edited by tiefbassuebertr; 25th March 2012 at 12:21 PM.
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Old 27th March 2012, 12:09 AM   #9
retrex is offline retrex  United States
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Default Similar situation with R117s

I have similar situations with R117s, I have working remotes, original R117 remotes, but they do not work with the R117s I have. I can help explore this, but not until Sunday at earliest. I have an R117 in pieces on my workbench that takes up all my bench room until them. But I will look at the schematics and work the problem from a logical view. Silly question maybe, but how do you know the IR on the remote is firing the correct code?
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Old 1st April 2012, 12:00 PM   #10
retrex is offline retrex  United States
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Default Ok, ready to go

OK I have cleared the bench and ready to tackle this project if you still have the need.


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File Type: jpg DSCF0001.JPG (311.5 KB, 19 views)
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