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[TV] Re: RCA HD61LPW163 DLP Dead No turn on
yeap your right.
----
Mike
----- Original Message -----
From: "Rick Hilton" <rickhilton@xxxxxxxxxxx>
To: <tv@xxxxxxxxxxxxxxx>
Sent: Sunday, July 29, 2007 6:00 PM
Subject: [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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>> >>> Checked by AVG Free Edition.
>> >>> Version: 7.5.476 / Virus Database: 269.10.23/924 - Release Date:
>> >>> 7/28/2007
>> >>> 3:50 PM
>> >>>
>> >>>
>> >>>
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>
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