Crt screen

[Pharo]

Hi all I picked up a s.c.i arcade last week and it plays great but I've noticed when I switch it on the first time nothing happens just a loud buzz so switch it off and back on and I get a rolling green screen with the same buzz but it gradually gets quieter and quieter till nothing then the screen bursts into life with the game is this anything I should be concerned about.
Cheers Brian.

 

[Ronnie Dent]

What monitor is it Brian? any lighning around the back of the tube?

 

[Pharo]

Hi Ronnie I'm sure it said Orion hantarex when I looked in the back at the screen.

 

[Ronnie Dent]

Is it a buzz or an arcing crackle? you would see sparks at the back

 

[Pharo]

Just a buzz Ronnie no sparks.

 

[Ronnie Dent]

Need to see if it's a polo or MTC chassis Brian, I'm no expert mind! probably needs a cap kit fitted

 

[Pharo]

Cheers Ronnie will try and get a picture or something tomorrow, when the crt does come on the picture is as bright and as sharp as any crt I've seen in a cab before with no burn.

 

[big10p]

Where's the buzzing coming from? The speakers? Does the cab have a Hantarex PSU by any chance?

 

[kingtreelo]

sounds like is knackered mate, so if you drop it off at mine i will gladly get rid of it for you

 

[Pharo]

Ha ha like it, I took a wee video just now the buzz is definitely coming from the speakers.

Did a wee video.

 

[kingtreelo]

looks like the entire cab is fucked, send it all over, i'll get shut of it for you

 

[big10p]

The game board doesn't seem to boot straight away? Check PSU voltages when you switch on. If it's a Hanty one, it's probably failing. They're pretty notorious.

 

[Pharo]

Hi to check this with a multimeter I gather I have it on black on ground and red on the 5v and 12v to check voltage.
Cheers Brian

 

[Pharo]

Ha ha wait till chase hq sits beside it that's got a sound problem so will be looking for help with that also 🤣

 

[TheDaddy]

Maybe send it to Retrosix ?? Pmsl !

Looks like caps to me possibly ?

Dave.

 

[Pharo]

Had some time today and it's definitely the psu it's as if it's taking time to get to the right voltage very slowly then it spikes to what it should be.
Here's a pic it is a hantarex.
The crt is a mtc-9000

 

[r-type]

The hanty PSUs can be repaired (I think Gunblade does them) although it's quite expensive. It might be cheaper to source a new ISO transformer for the monitor and JAMMA PSU for everything else. That's what I did in the end anyway, but had a spare ISO and PSU lying around. I can guide you through it should you want.

 

[Retroman839]

I have a us150 hantarex good W O
( same connector type )
If you get short on options £50 posted.

I’m not familiar with this cab.
But you might want to see if you can get a new psu that with some changing of your connectors supplies a correct and long term stable solution for your power requirements

 

[Pharo]

Hi r-type will have a look into that option might have to pm you though as it might be above my pay grade 🤣