[TechAssist] Re: Orion TV TV2501B..No video; Audio, HV OK.(2001)
- From: <tvservice@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 6 Aug 2003 17:35:14 -0500
Disconnect the cap on the crt board connected to G2 and see if G2 volt
return if not remove crt board from crt and see if G2 volts returns
I have had the Vert IC fail but not kill G2 volts
Robert
tvservice@xxxxxxxxxxxxx
H & H Electronics Inc
Dallas, TX
----- Original Message -----
From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
To: "Techassist" <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, August 06, 2003 4:42 PM
Subject: [TechAssist] Orion TV TV2501B..No video; Audio, HV OK.(2001)
>
> No schematic.
> This set came in with no video. HV and audio are fine. CRT filaments are
lit.
> No G2 voltage, I do have 140x3 on CRT pins, but no other voltages.
> B+ is 135.8
> I am leaning towards the vertical IC.
> I have 26.7 on 2; 27.5 on 3 and 13.3 on pin 5. It is a LA78041
> I suspect the vertical IC because the heatsink for the
HOT(2SD2499)/vertical IC gets really hot after a
> few minutes.
> I verified the vertical chip was running hot by cooling it down and
placing fingers on both components
> and the vertical IC roasted first. I also checked the HOT which seemed
fine..has an internal diode that
> tested.
> I increased the G2 and still no raster. Has anyone no this IC to cause no
video, before I order one?
> Thank you.
>
>
> Jeff Dougherty
> Intrepid Video TV/VCR
> 263 S Front St
> Steelton PA 17113
> ph..717-939-7708 fax...717-564-4952
> www.intrepid-video.com www.tech-repair.net
>
>
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