GUIDANCE NEEDED to mod - MARANTZ SA 7001 - Page 10

UV101 · 8th January 2013, 06:14 PM

Quote:

Originally Posted by 6h5c

A separate tranny is the best solution indeed, this voltage should be treated as 'digital supply' regarding noise.

Still have to look into that display-brightness-thing by the way...

4.5v Transformer en route!!

Must admit, I'm stumped by the brightness!!!!!

6h5c · 8th January 2013, 07:14 PM

You upped the heater voltage a bit, or was the player's voltage simply too low?

UV101 · 8th January 2013, 07:19 PM

I changed the zenor voltage up but it made no difference!! Display is still too dim

Do you think lifting h1 and h2 might make it brighter Ray??! maybe 6v instead of 4.3v?

6h5c · 9th January 2013, 06:09 AM

Oh, I thought you meant that you fixed it with the new heater winding... never mind

Increasing the heater voltage may help, but the life span of the display will be shorter if it 'burns' hotter. I don't know what the nominal heater voltage is supposed to be for this display, so there's no way of telling what is correct.

Ray

UV101 · 7th April 2013, 01:03 PM

I think Lee may have a fix for the dim display.......

Most definitely in the analogue engineering domain!!!!

6h5c · 7th April 2013, 03:36 PM

Always curious to see a fix for that. I haven't looked into it yet, it's still on my to-do list

Ray

Thomo · 09:00 AM

It took a new window, the relocation of the IR sensor and a bit of work but the results are worth it.

The original window is so dark it's crazy.

Edit: I suppose I'd best say thanks to Brent for the new window.

6h5c · 8th April 2013, 05:49 PM

Nice

So a non-electrical fix, that's a good one

Is this an original replacement window that is clear? I'd love to have one for my SA8400!

Ray

Thomo · 9th April 2013, 08:34 AM

Hi Ray,

The replacement window isn't quite clear, it's just not almost black like the original!

I had to cut the new one down to size and file the edges to make it fit, but it was definitely worth it.

Lee.

6h5c · 9th April 2013, 05:47 PM

Very neat job. The original one is very dark indeed, during the day it's very hard to see anything on the display. Very annoying...

I WILL get this fixed, whether it will be electrical or mechanical!

Ray

8th January 2013, 07:14 PM	#92
6h5c One Seriously Addicted to Audio and Electronics diyAudio Member Join Date: Apr 2004 Location: Heerhugowaard	You upped the heater voltage a bit, or was the player's voltage simply too low? __________________ Gonna buy my little girl a pink soldering-iron The new DOS-CFP board is out!

8th January 2013, 07:19 PM	#93
UV101 diyAudio Member Join Date: Dec 2008 Location: Oxford	I changed the zenor voltage up but it made no difference!! Display is still too dim Do you think lifting h1 and h2 might make it brighter Ray??! maybe 6v instead of 4.3v? __________________ When Bitstream came out, I thought, “my God, what are we going to do...?” Ken Ishiwata http://www.hifisounds.co.uk JA-88D Class A, Audio Aero Capitole MKII, Focal and Kimber "Leave Nothing as Standard"

9th January 2013, 06:09 AM	#94
6h5c One Seriously Addicted to Audio and Electronics diyAudio Member Join Date: Apr 2004 Location: Heerhugowaard	Oh, I thought you meant that you fixed it with the new heater winding... never mind Increasing the heater voltage may help, but the life span of the display will be shorter if it 'burns' hotter. I don't know what the nominal heater voltage is supposed to be for this display, so there's no way of telling what is correct. Ray __________________ Gonna buy my little girl a pink soldering-iron The new DOS-CFP board is out!

7th April 2013, 01:03 PM	#95
UV101 diyAudio Member Join Date: Dec 2008 Location: Oxford	I think Lee may have a fix for the dim display....... Most definitely in the analogue engineering domain!!!! __________________ When Bitstream came out, I thought, “my God, what are we going to do...?” Ken Ishiwata http://www.hifisounds.co.uk JA-88D Class A, Audio Aero Capitole MKII, Focal and Kimber "Leave Nothing as Standard"

7th April 2013, 03:36 PM	#96
6h5c One Seriously Addicted to Audio and Electronics diyAudio Member Join Date: Apr 2004 Location: Heerhugowaard	Always curious to see a fix for that. I haven't looked into it yet, it's still on my to-do list Ray __________________ Gonna buy my little girl a pink soldering-iron The new DOS-CFP board is out!


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8th April 2013, 08:58 AM	#97
Thomo diyAudio Member Join Date: Nov 2006	It took a new window, the relocation of the IR sensor and a bit of work but the results are worth it. The original window is so dark it's crazy. Edit: I suppose I'd best say thanks to Brent for the new window. __________________ /\/\/\/\/\/\/\/ Last edited by Thomo; 8th April 2013 at 09:00 AM.

8th April 2013, 05:49 PM	#98
6h5c One Seriously Addicted to Audio and Electronics diyAudio Member Join Date: Apr 2004 Location: Heerhugowaard	Nice So a non-electrical fix, that's a good one Is this an original replacement window that is clear? I'd love to have one for my SA8400! Ray __________________ Gonna buy my little girl a pink soldering-iron The new DOS-CFP board is out!

9th April 2013, 08:34 AM	#99
Thomo diyAudio Member Join Date: Nov 2006	Hi Ray, The replacement window isn't quite clear, it's just not almost black like the original! I had to cut the new one down to size and file the edges to make it fit, but it was definitely worth it. Lee. __________________ /\/\/\/\/\/\/\/

9th April 2013, 05:47 PM	#100
6h5c One Seriously Addicted to Audio and Electronics diyAudio Member Join Date: Apr 2004 Location: Heerhugowaard	Very neat job. The original one is very dark indeed, during the day it's very hard to see anything on the display. Very annoying... I WILL get this fixed, whether it will be electrical or mechanical! Ray __________________ Gonna buy my little girl a pink soldering-iron The new DOS-CFP board is out!

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