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Main => Monitor/Video Forum => Topic started by: mccoy178 on November 02, 2006, 04:13:26 pm

Title: My first monitor problem. Blown fuse on PCB.
Post by: mccoy178 on November 02, 2006, 04:13:26 pm

I bought a Street Fighter 2 cabinet and it didn't work.  I did find a blown fuse on the pcb board of the monitor where the red power wires going to the monitor connect.  I replaced the fuse, and when plugged back in, it just began to start when the fuse blew again.  What other information can I provide to help on this?  I can do some problem solving, I just need some tips on what to test or look for.  Thanks for your help in advance.

Title: Re: My first monitor problem. Blown fuse on PCB.
Post by: grantspain on November 02, 2006, 04:31:16 pm

is the fuse the correct rating and is it blowing black

Title: Re: My first monitor problem. Blown fuse on PCB.
Post by: D_Zoot on November 02, 2006, 04:34:52 pm

Quote from: mccoy178 on November 02, 2006, 04:13:26 pm

  What other information can I provide to help on this? 

Make/model of the monitor would be a huge help,  many of us can tell you what common issues are for various monitors, but we need to know what the monitor is first

There should be a decal somewhere on the monitor (NOT the decal on the back of the tube) with some ID information.   If there isn't anything to identify it, post a picture of the board.


D

Title: Re: My first monitor problem. Blown fuse on PCB.
Post by: mccoy178 on November 02, 2006, 04:52:58 pm

Okay, here is what I have since discovered.  The fuse is a 4A 125V and it is blowing black.  It is located by the degaussing coil and not the power like I had first stated.  Next, I pulled the board after discharging the monitor and it is a Kortek chassis # KTA-915.  Does that help?

Title: Re: My first monitor problem. Blown fuse on PCB.
Post by: grantspain on November 02, 2006, 05:04:32 pm

not knowing the full history its difficult to say whats happening BUT always when a fuse blows pooless it points towards a dead short on the primary a/c psu circuit,in other words its most likely to be the degauss coil,degauss ptc component or the bridge rectifier circuit
start by unplugging the degauss coil,then meter the bridge circuit then desolder the ptc component(thats the black or white plastic box like component with three legs that the degauss coil goes directly to),oh and make sure you have lots of fuses

Title: Re: My first monitor problem. Blown fuse on PCB.
Post by: mccoy178 on November 02, 2006, 05:08:46 pm

I did test the monitor with the degaussing coil unplugged and the gun control cable unplugged.

Title: Re: My first monitor problem. Blown fuse on PCB.
Post by: grantspain on November 03, 2006, 03:03:52 am

then go to the next thing i suggested

Title: Re: My first monitor problem. Blown fuse on PCB.
Post by: mccoy178 on November 03, 2006, 03:19:49 am

Will do.  Just keeping you updated.  I will have more to report on Monday.