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Sony BU-1 compatibility?
Sony BU-1 compatibility?
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Old 18th July 2017, 07:28 AM   #11
Mike P is offline Mike P  United Kingdom
diyAudio Member
Join Date: Jan 2012
Hi Salar,

I think the laser in my 333ESD is probably damaged by cigarette smoke. When first received this player it stank of cigarettes inside! I have cleaned the top surface of the top lens and also the underside surface of the top lens (tricky) but it hasn't helped much.

I don't remember exactly but I think I was measuring about 0.9v pk-pk for the laser eye pattern.

The player will play perhaps 1 in 3 discs part of the way through so I don't think there are any other problems, I think it is just a weak laser.

I thought it was possible that may be the photoreceptor on the laser was dirty and contaminated with nicotine residues but I cannot see a way to get to it to clean it. I did consider trying to clean the whole laser assembly in a bath of IPA but this would be an absolutely last resort.

If you have a spare BU1-C that's great and I would be interested in buying it from you.

If you only have spare BU-1 lasers that could work too but it looks like I will have to swap the RF boards.
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Old 18th July 2017, 10:24 AM   #12
Salar is offline Salar  Germany
diyAudio Member
Join Date: Feb 2006
Location: Germany
Hi Mike,
It is BU-1.
Did you compare the cables/connections between RF-Board and Main Board?
I do not have the time for this in the moment, maybe tonight
Maybe the RF-Board can be simply kept and only the cabling has
to be adapted. This would be easy and save then.
Motor boards seem to be the same.
All the best, Salar
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