[TechAssist] Re: Question on Hitachi 50v500a
- From: "tvservice" <tvservice@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 10 Aug 2004 08:44:10 -0500
Besides the 230 to 300 volt supply to the ballast look for a start pulse
from micro usually around 3-5 volts.
Most "Training manuals" will tell where to test for this pulse, on some
models you may need to contact manufacturer tech line.
Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc
----- Original Message -----
From: "Damon" <damon101@xxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, August 10, 2004 7:57 AM
Subject: [TechAssist] Re: Question on Hitachi 50v500a
> 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
> | > |
> | > |
> | > |
> | >
> |
>
| --------------------------------------------------------------------------
> | > ---
> | > | Lost Password:
> | > | http://www.tech-assist.org and select "Login Problems?".
> | > | Email Archives:
> | > | //www.freelists.org/archives/techassist/
> | > |
> | >
> | >
> |
>
> --------------------------------------------------------------------------
> | ---
> | > Lost Password:
> | > http://www.tech-assist.org and select "Login Problems?".
> | > Email Archives:
> | > //www.freelists.org/archives/techassist/
> |
> |
>
| --------------------------------------------------------------------------
> ---
> | Lost Password:
> | http://www.tech-assist.org and select "Login Problems?".
> | Email Archives:
> | //www.freelists.org/archives/techassist/
> |
> |
>
>
> --------------------------------------------------------------------------
---
> Lost Password:
> http://www.tech-assist.org and select "Login Problems?".
> Email Archives:
> //www.freelists.org/archives/techassist/
-----------------------------------------------------------------------------
Lost Password:
http://www.tech-assist.org and select "Login Problems?".
Email Archives:
//www.freelists.org/archives/techassist/
Other related posts:
