ArcRevival
Well-known member
Question about Donkey Kong with a Sanyo 20Z2Aw in it
I have to say that Nintendo monitors are still a little foreign to me so maybe someone can figure this one out.
Picked up a DK where someone started to put a 20Z2AW from a Punchout in it but did not quite finish it. The plug for sound was plugged into the inverter board and the plug from the chassis that is supposed to go there was just left hanging. The video cable was going to the inverter board but since the audio was plugged into to it instead of the power from the chassis it had no picture. I put the video cable from the board straight to the chassis.
The game had no picture or sound but the monitor was coming on with high voltage. Figured out where the sound plug was supposed to go on the audio board and moved it over. Bypassed the inverter board as it's not needed for DK. Now I have a picture and it looks great but volume is very low, can barely hear it and I mean barely. Volume pot didn't really make a change other than to bring it up to where I can just hear it.
I installed new caps on the audio board and here is where the big question comes in. There is a place for the cap at c378 but it was not populated like it is on a 20ez. Do I need to install that cap ? Does this monitor have the wrong audio board ? I don't see that cap in the 20z2aw schematic. I ohmed out the speaker, it checks good. I tried a second boardset, same volume level. I still need to verify the pot is good but am still wondering about that cap at C378.
I have to say that Nintendo monitors are still a little foreign to me so maybe someone can figure this one out.
Picked up a DK where someone started to put a 20Z2AW from a Punchout in it but did not quite finish it. The plug for sound was plugged into the inverter board and the plug from the chassis that is supposed to go there was just left hanging. The video cable was going to the inverter board but since the audio was plugged into to it instead of the power from the chassis it had no picture. I put the video cable from the board straight to the chassis.
The game had no picture or sound but the monitor was coming on with high voltage. Figured out where the sound plug was supposed to go on the audio board and moved it over. Bypassed the inverter board as it's not needed for DK. Now I have a picture and it looks great but volume is very low, can barely hear it and I mean barely. Volume pot didn't really make a change other than to bring it up to where I can just hear it.
I installed new caps on the audio board and here is where the big question comes in. There is a place for the cap at c378 but it was not populated like it is on a 20ez. Do I need to install that cap ? Does this monitor have the wrong audio board ? I don't see that cap in the 20z2aw schematic. I ohmed out the speaker, it checks good. I tried a second boardset, same volume level. I still need to verify the pot is good but am still wondering about that cap at C378.
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