Moscode 300 Upgrade

ron944 · 7th March 2011, 07:50 PM

Hi, I am doing a full upgrade on my Moscoed 300 and created a problem. As part of the upgrade I am hard wiring to the circuit board. By mistake I cut off one side of the connector from the switch to the transformer. It is a six connector that uses four of the six. If someone can let me know what the two white wires and two dark wires connect to on the transformer it will be greatly appreciated.

Thanks,
Ron

llwhtt · 7th March 2011, 09:11 PM

Do you have a schematic? I have a schematic for the audio portion only no power supply.

Craig

ron944 · 7th March 2011, 10:51 PM

No, I have never seen a schematic for the power supply anywhere. I was hoping somone can just look at their unit and tell me the colors from the tranformer that correspond to the other side of the connector. I had to move the transformer over as I replaced the soda can caps with 25,000uf Sprague computer grade and they were too tall for the chassis.

llwhtt · 7th March 2011, 11:01 PM

All I have is a schematic, no amp.

Craig

vilfort · 12th March 2011, 06:51 PM

I have two MOSCODE 300s so let me take a look...

Aha! - Yes, the there are two primary windings wired in parallel for 120V operation. Here are the color codes:

Light wire: yellow-white + black-white
Dark wire: red + black red

Before you connect, make sure you measure the primaries though. They should show roughly the same value in pairs.

Hope this helps.

D.

ron944 · 14th March 2011, 03:18 AM

Does your transformer have four wires coming from it or six. Mine has six and the Black/White wire is one was not being used. I have measured the resistance on the Primaries.

vilfort · 14th March 2011, 09:46 PM

6 - and the yellow (white?) and the black-white is not being used for 120V AC

vilfort · 14th March 2011, 09:52 PM

Correction: it's the black-yellow that is not connected.

7th March 2011, 07:50 PM	#1
ron944 diyAudio Member Join Date: Sep 2010 Location: Florida	Moscode 300 Upgrade Hi, I am doing a full upgrade on my Moscoed 300 and created a problem. As part of the upgrade I am hard wiring to the circuit board. By mistake I cut off one side of the connector from the switch to the transformer. It is a six connector that uses four of the six. If someone can let me know what the two white wires and two dark wires connect to on the transformer it will be greatly appreciated. Thanks, Ron

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7th March 2011, 09:11 PM	#2
llwhtt diyAudio Member Join Date: Jun 2008	Do you have a schematic? I have a schematic for the audio portion only no power supply. Craig

7th March 2011, 10:51 PM	#3
ron944 diyAudio Member Join Date: Sep 2010 Location: Florida	No, I have never seen a schematic for the power supply anywhere. I was hoping somone can just look at their unit and tell me the colors from the tranformer that correspond to the other side of the connector. I had to move the transformer over as I replaced the soda can caps with 25,000uf Sprague computer grade and they were too tall for the chassis.

7th March 2011, 11:01 PM	#4
llwhtt diyAudio Member Join Date: Jun 2008	All I have is a schematic, no amp. Craig

12th March 2011, 06:51 PM	#5
vilfort diyAudio Member Join Date: Feb 2010	I have two MOSCODE 300s so let me take a look... Aha! - Yes, the there are two primary windings wired in parallel for 120V operation. Here are the color codes: Light wire: yellow-white + black-white Dark wire: red + black red Before you connect, make sure you measure the primaries though. They should show roughly the same value in pairs. Hope this helps. D.

14th March 2011, 03:18 AM	#6
ron944 diyAudio Member Join Date: Sep 2010 Location: Florida	Does your transformer have four wires coming from it or six. Mine has six and the Black/White wire is one was not being used. I have measured the resistance on the Primaries.

14th March 2011, 09:46 PM	#7
vilfort diyAudio Member Join Date: Feb 2010	6 - and the yellow (white?) and the black-white is not being used for 120V AC

14th March 2011, 09:52 PM	#8
vilfort diyAudio Member Join Date: Feb 2010	Correction: it's the black-yellow that is not connected.

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