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[TV] Re: RCA HD61LPW163 DLP Dead No turn on
Can you here the color wheel spinning..?
If it does not spin it will shut down..
The color wheel is the first
thing that fires up then everything after that...
No color wheel rotation no lamp fireing...
see ya....
--
Rick Hilton / Field Technician / Best Buy
Field Office: 27050 Wick Rd Taylor,MI. / USA 48180
Technical Office: 476 Robbe Ave. Belleville, MI. / USA 48111
734-732-0027 Mobile
Nextel Direct Connect: 131*23169*3
Electronics Technician 25 Years As of 2007
-------------- Original message --------------
From: = Steve = <houaudiovideo@xxxxxxxxxxxxx>
>
> http://www.ace4parts.com/Departments/strongBrowse-By-Categorystrong/Lamp--Led/Co
> ld-Cathode.aspx
> These folks are a power supply that will fire those lamps.
> In case the link doesn't make it, it's www.ace4parts.com Look under
> lamps and the cold cathode.
> Steve Rumel
> Houston Audio Video Service
> 2727 Fondren, Suite 5Q
> Houston, Tx 77063
> 713-780-4440
>
>
>
> steves@xxxxxxxxxxxxxxxxxxxxxxxxx wrote:
> > Thanks for the feedback Mike, I am still trying to learn how to test thesse
> lamps. They either need to be ignited or is there any simpler way besides a
> visual. Visually the lamp is intact although some min estimated 3000 hours on
> it. At turn on there is absolutely no sound, tick or pop. Just the occasional
> sound of the relay which only turns on and will not shut off the set from the
> power switch. I suspected the turn off will not be allowed until the proper
> start up sequence completes. Are you familiar with the startup cycle? Upon
> plugging in the unit, relay clicks as the front lights turn on and this is the
> only sound you hear.
> >
> > -----Original Message-----
> >
> >> From: Mike Bates
> >> Sent: Jul 29, 2007 11:08 AM
> >> To: tv@xxxxxxxxxxxxxxx
> >> Subject: [TV] Re: RCA HD61LPW163 DLP Dead No turn on
> >>
> >>
> >> well since the ballast is seeing the Boost-up B+ from the boost converter,
> >> it should be ready to fire.
> >>
> >> make sure the lamp is really ok, im sure you probably already did.
> >>
> >> Also there is an opto isoloator on the ballast board. probabably 2 of them
> >> on the input connector to the motherboard. one is to signal the ballast on,
> >> another is to tell the MB the lamp is lit or not.
> >>
> >> you can jump the transistor side of the opto on the signal-on to see if the
> >> ballast is going to fire. it woudl tell you if its the ballast or the
> >> motherboard. also listen for a distinct "popping" sound near the ballast
> >> during power on, which is the ignition voltage hitting the lamp trying to
> >> ignite it. if you hear nothing and jumping the opto does nothing, then the
> >> ballast is bad.
> >>
> >> usually what goes bad in the UHP ballast is the H-Bridge which is running an
> >> IRF640 mosfet bridge. something like that. one shorts.
> >>
> >>
> >> ----
> >> Mike
> >>
> >>
> >>
> >> ----- Original Message -----
> >> From: "steves@xxxxxxxxxxxxxxxxxxxxxxxxx"
> >> To:
> >> Sent: Sunday, July 29, 2007 7:54 AM
> >> Subject: [TV] RCA HD61LPW163 DLP Dead No turn on
> >>
> >>
> >>
> >>> This DLP TV has a power lite that stays on yet no fire-up of the ballast.
> >>> I expect that part of the reset sequence for this TV is to power up the
> >>> lamp ballast before completing the reset. Once on it wont shut its
> >>> indicator lamps off but the Ballast or lamp assemble gets the 365V DC from
> >>> the relay circuitry once plugged in, then nothing happens. Is anyone
> >>> familiar with the start up process of this model? Does the ballast become
> >>> a high failure rate part (Module) I cant see any obvious physical damage
> >>> and the ballast is getting power but there is no corresponding lamp
> >>> activation. Any input/shared experience here would be great.
> >>>
> >>> Thanks
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> >>> --
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> >>> 3:50 PM
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