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Title: u5000 frustrations!! Post by: Rayoshi on July 26, 2014, 09:57:06 am Ok I bought a killer instinct 2 cab with a u5000 and all it was doing was clicking! after a ton of googling, a cap kit, flyback, 2 Hots, and a couple resisters. The clicking sound is gone! Great news I thought. but it still wont power up! I've got no neck glow! and when i "try" to discharge the monitor I get nothing. the B+ reads at only 7.8vDC which I know it needs to be around 115v. Im just at a wall and dont know what else to do.
Just looking for some pointers I guess. Thanks guys Title: Re: u5000 frustrations!! Post by: Mr_Rampage on July 26, 2014, 10:39:01 am Check the power supply is giving out the proper voltages. Then if that doesn't work check the fuses that there the right values and not burnt out. I am no expert on this but it sounds to me like a power supply issue of some sort. Even if it isn't its still two good places to check.
Title: Re: u5000 frustrations!! Post by: iankellogg on July 28, 2014, 09:45:02 am Welcome to the frustration of the U5000.
(http://i.imgur.com/hW6jecm.jpg) (http://imgur.com/hW6jecm) Remove that jumper and turn it on. Measure across the big green cap in the photo. You should be getting over 150V (this is okay for testing purposes) There is a chance the SMPS controller died. If you have a short you should still be hearing the clicking sound. If that is not dead I would probably start thinking about the input power mosfet. If everything checks out then you need to try to connect a 30W lightbulb up (i use a CFL, they work well enough) and remeasure across the capacitor. You should see around 130V (if not adjust the pot near the controller) Title: Re: u5000 frustrations!! Post by: Rayoshi on July 30, 2014, 07:34:59 pm (http://i.imgur.com/1iOw58i.jpg)
What is this daughter board? My u5000 doesnt have that. Mine from what ive read is a modified u5000 it doesnt have the pin header to change it to med res. Title: Re: u5000 frustrations!! Post by: VertexGuy on July 30, 2014, 08:05:44 pm Ok I bought a killer instinct 2 cab with a u5000 and all it was doing was clicking! after a ton of googling, a cap kit, flyback, 2 Hots, and a couple resisters. The clicking sound is gone! Great news I thought. but it still wont power up! I've got no neck glow! and when i "try" to discharge the monitor I get nothing. the B+ reads at only 7.8vDC which I know it needs to be around 115v. Im just at a wall and dont know what else to do. Just looking for some pointers I guess. Thanks guys It went into Shutdown? Title: Re: u5000 frustrations!! Post by: Rayoshi on July 30, 2014, 08:29:16 pm It doesnt start up. when i first got it it was clicking (which is what I thought was shutdown?) But now that Ive done a cap kit, flyback, changed some resistors (r100,r728,r760,r104, and r111)and now it doesnt click it just doesnt turn on. and i have no neck glow.
Title: Re: u5000 frustrations!! Post by: John's Arcade on July 31, 2014, 08:31:31 am It doesnt start up. when i first got it it was clicking (which is what I thought was shutdown?) But now that Ive done a cap kit, flyback, changed some resistors (r100,r728,r760,r104, and r111)and now it doesnt click it just doesnt turn on. and i have no neck glow. https://www.wellsgardner.com/pdf/Repair/U5000_25_inch.pdf Title: Re: u5000 frustrations!! Post by: iankellogg on July 31, 2014, 08:37:59 am when it isn't clicking, are you getting 130V at the B+ test point?
That little thing john posted is a good place to start. It sounds like the heater isn't running so you need to make sure your voltages are working and follow the chart. Title: Re: u5000 frustrations!! Post by: John's Arcade on July 31, 2014, 08:48:38 am when it isn't clicking, are you getting 130V at the B+ test point? That little thing john posted is a good place to start. It sounds like the heater isn't running so you need to make sure your voltages are working and follow the chart. Voltage regulator, B+, shutdown, something like that. SHUTDOWN: C713, C730, Z701, IC U701, |