Sharp XM 1801 tube swap?

[ncflagg]

Hello.

     I picked this Super Mario Bros (I know it's super mario because it has obvious burn-in) monitor hoping it was a Sanyo 20 but it's clearly not that. Can anyone identify it? Would it hook up to my Nintendo vs Unisystem?

Thanks

[SirPeale]

Found some stuff...you have a label on the side of your monitor.

http://homearcade.org/BBBB/XM-2001N.html

Another Link

[Kevin Mullins]

 

[ncflagg]

I hooked this monitor up to a Nintendo vs cab and replaced a fuse. It sounds like it is trying to power up but all I get is a loud clicking sound (maybe from the flyback transformer). Does anyone know where to get a flyback for this Sharp XM-180IN (or think this would help)?

[Ken Layton]

If it hasn't been recapped you should do that.

There's something else you can do to isolate flyback troubles. With all the lights in the room off and everything pitch black, power up the monitor. If the flyback is bad you'll see sparking/arcing/static electricity dancing around.

Remember, flybacks for this model have been unavailable for nearly 20 years. Sharp discontinued the flybacks long ago.

[ncflagg]

If the flyback is bad and there is no suitable replacement then is it a very combersome paperweight or is there anything salvagable?

[Ken Layton]

I have successfully used an 8liners.com replacement chassis on this monitor. However you won't be able to use it "as-is" on Nintendo games because it doesn't have video inversion nor sound amplifier built-in.

I use these as replacement monitors in JAMMA applications.

[ncflagg]

Can I hook this monitor up to the 100v output that the Sanyo EZV20 uses or does it need 120v?

[Ken Layton]

Both the Sharp XM-1801 and XM-2001 monitors operate on 100 volts AC.

The 8liners "Jen Shinn" replacement chassis has a built-in switching power supply and will operate perfectly fine on 100 volts AC.

[ncflagg]

I started to dismantle the monitor to put the cap kit in when I discovered a busted circuit board on the bottom where some control pots are (volume, bright ,hold etc). It was almost broken in half. I bypassed the broken circuitry with wire and powered up the monitor. The monitor now stays on and the volume control works but I can't see anything. I turned some of the other repaired pots but got nothing. This monitor has a degauss switch (it did nothing when i tried it...made no noise either). I have found that there is continuity across the the two pins of the degauss switch at the mainboard. I would think that this should not be the case... If i unplug this cable from the board the switch tests fine but when it's plugged in I get a constant beep from my meter.

I have yet to install the cap kit.

Thoughts?

[SirPeale]

I have yet to install the cap kit.

Thoughts?

Install the cap kit.

[ncflagg]

I installed the cap kit with no new results. The sound amplifier in the monitor still works and I have a black screen. I do find it odd that there is continuity over the contacts for the degauss switch. Where can I go from here?

[Kevin Mullins]

I have found that there is continuity across the the two pins of the degauss switch at the mainboard. I would think that this should not be the case... If i unplug this cable from the board the switch tests fine but when it's plugged in I get a constant beep from my meter.

It sounds as if you are actually measuring the degauss COIL itself with the cable plugged in. (across the switch contacts)
If the monitor was powering up properly then the degauss circuit would open the PTC shortly after turning on and then you would not measure the coil.

[ncflagg]

Ok, so I'll stop thinking about the degauss switch. I can see that the neck of the tube is lit up...what does that tell me?

Also, I can hear that the H-Hold is doing something. If I unplug the video cable the sound pitch of the monitor also changes.

[ncflagg]

I've noticed that many (but not all) off the Nintendo monitors I've seen have video inverter boards and output from "non inverted" if they are from nintendo pcbs. The Sharp monitor I have did not come with an inverter board...do I need one anyway for signal amplification or something?

[ncflagg]

Okay you do not need the inverter board. My other Nintendo monitors work fine without one.

Will the Sharp XM 1801 17" monitor power a 19" tube? I want to see if the tube is the problem....