[TechAssist] Re: Magnavox RJ8540 AK03 (PTV325?)video blacks outintermittantly
- From: Philip Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 05 Nov 2003 11:04:51 -0500
I will print this out to take along, and will check all mentioned areas.
Note, the high voltage does not drop out, the brightness does.Still
possible same soldering needed.
originally my "helper" soldered the deflection areas to restore it from
a "dead set" condition,and some techs do just the absolute necessary to
restore picture,stop there,and not a bit more. I will no doubt find more
of the same solder connections.
Thanks,
Phil Bader
peggs wrote:
>
> Resolder connectors on the the PCB's.
> I think the horiz. Oscillator pcb is mounted to the board on the left.Resolder
> it's connector.
> from Winstips,various PTV3 chassis
> Heat/chill TDA1770 on horiz. osc. board if there.
> C450/455(470uf/25v)Main "Pi" Filters On 13v Line,if in there.
> Module A10320b002 (Defl): Solder Bad At T2-14 Next Stake. Resolder All Stakes
> (if these are feedthru stakes go over both sides of pcb)
> Have Video Going Into A/V I/O Jack Board But Not Out. Replace A/V Jack Panel
> R620 47k And R621 6.8k On Enterface Panel Reversed At Factory (Svm Circuit)
>
> Peggs
>
> At 06:12 AM 11/5/03, Philip Bader wrote:
> >I resurrected this 1989 46 inch Magnavox projection TV for my own use
> >3-4 years ago.Ever since then, sometimes the screen just blinks out
> >black for a moment, then blinks back normal. Not HV loss, video loss.
> >Sometimes I think I see have noise in the pix as it happens. Old
> >timers, remember when the old TVs had dirty breakdown switches? Not the
> >verttical collapse part, the video part of the switch. Like that.Totally
> >black, like "cut off", or blanking. It seems to me to happen during
> >especially violent scenes with a lot of action and flashing bright
> >scenes (like in action movies).
> >It has done this for as long as I have had it.May go days normal, or may
> >blink several times a night. I thought it looked somewhat like those
> >Sony TVs with the "IK" circuit cutting in and out.
> >I am doing some maintanence on it Thursday for the holidays(fluid
> >change, cleaning mirror,etc) and I want to address this symptom while
> >it's open.
> >Any related symptom histories on this model?
> >Phil Bader
> >--
> >Philip Bader
> >Jan Phyl TV Inc. (estab. 1976)
> >3420 Recker Hwy. Winter Haven, Fl. 33880
> >Fax (863) 299-8821
> >email: tjanphyl@xxxxxxxxxxxxxxx
> >For Professional Technicians Only
> >
> >*****************************************************************************
> >Classifieds! Buy or Sell!
> >http://sell.tech-assist.org
> >The Tech Address Book:
> >http://www.tech-assist.org/secure/tip/contact.htm
> >Add a Repair Tip Here, or Change/Remove your Email Address:
> >http://www.tech-assist.org/secure/tip/main.htm
> >Lost Password:
> >http://www.tech-assist.org and select "Lost your Login Info?".
> >Email Archives:
> >//www.freelists.org/archives/techassist/
>
> *****************************************************************************
> Classifieds! Buy or Sell!
> http://sell.tech-assist.org
> The Tech Address Book:
> http://www.tech-assist.org/secure/tip/contact.htm
> Add a Repair Tip Here, or Change/Remove your Email Address:
> http://www.tech-assist.org/secure/tip/main.htm
> Lost Password:
> http://www.tech-assist.org and select "Lost your Login Info?".
> Email Archives:
> //www.freelists.org/archives/techassist/
--
Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx
For Professional Technicians Only
*****************************************************************************
Classifieds! Buy or Sell!
http://sell.tech-assist.org
The Tech Address Book:
http://www.tech-assist.org/secure/tip/contact.htm
Add a Repair Tip Here, or Change/Remove your Email Address:
http://www.tech-assist.org/secure/tip/main.htm
Lost Password:
http://www.tech-assist.org and select "Lost your Login Info?".
Email Archives:
//www.freelists.org/archives/techassist/
Other related posts:
