[TechAssist] Re: Hitachi TV Model Number CT2262 second post
- From: "Shaun" <satguy@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 3 Jul 2003 15:50:40 -0600
Turned out to be C739 (1000 uf 16 volt) shorted to ground and of course I
had to replace the
flyback. Best part was when it came on I found out the picture tube was
really weak I boosted it and it looks just ok anyway thank you very much for
all that helped on this on especially Alvie Rodgers who pointed me in the
right direction.
Shaun
Advanced Electronics
224 West Riverview Ave.
970-867-3124
Fort Morgan, CO 80701
satguy@xxxxxxxxxxxxx
----- Original Message -----
From: <MDileo0000@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, July 03, 2003 10:46 AM
Subject: [TechAssist] Re: Hitachi TV Model Number CT2262 second post
> Are you using a scope? Can you verify whether or not you are getting
> horizontal drive from pin 17 out of IC501? I have the factory schematic.
You must
> remove A/C power at the plug to reset the chip if it is going into protect
> shutdown. Disable the HOT and scope IC501. Pin 18 is the x-ray safety
shutdown on
> IC501 and will trigger if this pin is over 0.6vdc.
> The circuitry of these sets was/is very stable. They did have a high
failure
> rate with the flyback and the picture tubes went south in a rather short
> time. That's a 1986 model if I am not mistaken.
>
> Dominic DiLeo
> Atlantic TV
> Freeport, Maine
> &&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
>
> have this Hitachi CT2262 that had a bad flyback that burnt a hole in the
> pc on pin 10. I replaced the fly and still no high voltage, the relay
clicks
> on and there is 156 vdc on the collector of Q702 but no drive on the
base.
> There is also no horz drive on Q701 but there is 22 vdc on the collector
of
> Q701. I have checked all the resistors in the power supply and the
regulator
> is good. Any ideas on this old dog?
>
> Shaun
> Advanced Electronics
> Fort Morgan, CO 80701
> (970) 867-3124
> satguy@xxxxxxxxxxxxx
>
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