[TechAssist] Re: Question on Hitachi 50v500a
- From: "Damon" <damon101@xxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 10 Aug 2004 07:57:07 -0500
Well so far the only test I know is to check for 230V dc on the main line
going into the ballast, I'd like to check the transformer area with a probe
and see if inductive pickup works on these transformers, just like we do
with IHVT's......right now, if I don't hear diddly coming from the ballast,
either within one minute of the fans coming on in the LCDs or within 20
seconds of the color wheel spinning up on the DLPs, then I suspect the
ballast blown....of course you have to have a quiet room for this...
Damon Brunger
Telrad Electronic Services
Ft Wayne, IN 46815
----- Original Message -----
From: "Leonard Caillouet" <lcaillo@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, August 10, 2004 7:06 AM
Subject: [TechAssist] Re: Question on Hitachi 50v500a
| Most of the ballasts that we have seen that were bad were on Sharp
| projectors. They would cause the lamp to fail early or, as Damon said,
not
| fire at all. Too bad most of the parts are not available on those. They
| would not be very hard to repair. I know I could use some better
| troubleshooting and testing techniques for them. What are the rest of you
| doing? If we had a good procedure for testing the ballast, this is one
| service that we could offer to discourage customers from changing the
lamps
| themselves. A ballasts test, cleaning, and calibration with each lamp
| change could be a good service package to offer.
|
| Lemonade from lemons...or margaritas from limes, depending on the number
of
| dogs in the shop...
|
| Leonard Caillouet
| Electronics World
|
| ----- Original Message -----
| From: "Damon" <damon101@xxxxxxxxxxxxxx>
| To: <techassist@xxxxxxxxxxxxx>
| Sent: Monday, August 09, 2004 10:33 PM
| Subject: [TechAssist] Re: Question on Hitachi 50v500a
|
|
| > Mostly bulbs, no ballasts. When you get there, listen closely to the
| ballast
| > while it's firing.....bad bulb will tic tic tic......tic tic
tic.....I've
| > had some where the ballast will cause the bulb to rattle like a thin
piece
| > of sheet metal, ballast is good, but the bulb has lost the gas if you
hear
| > that.
| >
| > Damon Brunger
| > Telrad Electronic Services
| > Ft Wayne, IN 46815
| > ----- Original Message -----
| > From: <Royal19960@xxxxxxx>
| > To: <techassist@xxxxxxxxxxxxx>; <gizmo@xxxxxxxxxxxxxxxx>
| > Sent: Monday, August 09, 2004 2:33 PM
| > Subject: [TechAssist] Question on Hitachi 50v500a
| >
| >
| > | Hi.
| > | I have a service call to do on one of these and it's quite a few milws
| > away.
| > | The"red" led stays on all the time and the "laml" led lights.
| > | Hitachi says I should go out there (60 miles round trip) and see if
the
| > relay
| > | clicks with the back off, then drive back and order the bulb and then
| > return
| > | to the home and install it.
| > | The question,,,,,Have you had any bad ballest's or is it always the
| buld?
| > | Thanks
| > | Roy
| > |
| > | Roy E. Adams C.E.T./C.A.
| > | Bonded TV Service
| > | 5158 W Forest Home Ave
| > | Milwaukee, WI 53219
| > | 414-541-9111
| > | Bondedtv.com
| > | We have over 8,000 tubes listed on the website
| > | Web hosting at only $50.00 per year at BondedHost.com
| > |
| > |
| > |
| >
|
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