GUIDANCE NEEDED to mod - MARANTZ SA 7001 - Page 10 - diyAudio
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Old 8th January 2013, 06:14 PM   #91
UV101 is offline UV101  England
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Quote:
Originally Posted by 6h5c View Post
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!!!!!
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Old 8th January 2013, 07:14 PM   #92
6h5c is offline 6h5c  Netherlands
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You upped the heater voltage a bit, or was the player's voltage simply too low?
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Old 8th January 2013, 07:19 PM   #93
UV101 is offline UV101  England
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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?
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Old 9th January 2013, 06:09 AM   #94
6h5c is offline 6h5c  Netherlands
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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
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Old 7th April 2013, 01:03 PM   #95
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I think Lee may have a fix for the dim display.......

Most definitely in the analogue engineering domain!!!!
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Old 7th April 2013, 03:36 PM   #96
6h5c is offline 6h5c  Netherlands
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Always curious to see a fix for that. I haven't looked into it yet, it's still on my to-do list

Ray
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Old 8th April 2013, 08:58 AM   #97
Thomo is offline Thomo  United Kingdom
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Click the image to open in full size.

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.
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Old 8th April 2013, 05:49 PM   #98
6h5c is offline 6h5c  Netherlands
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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
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Old 9th April 2013, 08:34 AM   #99
Thomo is offline Thomo  United Kingdom
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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.
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Old 9th April 2013, 05:47 PM   #100
6h5c is offline 6h5c  Netherlands
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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
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