[TechAssist] Re: Magnavox RL8570,Chas PTV380
- From: "al m" <ampm@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sun, 12 Oct 2003 14:19:31 -0400
On the way let me know if you got them.
Al Marquardt
ampm@xxxxxxx
Al Marquardt Electronic Repair
206 W Main
Girardville Pa. 17935
----- Original Message -----
From: <phxmobilbob@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, October 11, 2003 10:33 PM
Subject: [TechAssist] Re: Magnavox RL8570,Chas PTV380
>
> Thanks Al
> What I need is the Vertical section ,to include the
feedback[pump-up]path.I need to check the caps maybe surface mounted .
> I appreicate Your offer to send Me what You have .
> Bob Searcy
>
>
>
>
> --- On Fri 10/10, al m < ampm@xxxxxxx > wrote:
> From: al m [mailto: ampm@xxxxxxx]
> To: techassist@xxxxxxxxxxxxx
> Date: Fri, 10 Oct 2003 22:12:25 -0400
> Subject: [TechAssist] Re: Magnavox RL8570,Chas PTV380
>
> Hold on Bob. My records show I have a PTV380 manual. Have to go to
Philly<br>tomorrow but I'll check Sunday. What section do you need? Never
mind I'll<br>send what I have.<br>Al Marquardt<br>ampm@xxxxxxx<br>Al
Marquardt Electronic Repair<br>206 W Main<br>Girardville Pa. 17935<br>-----
Original Message ----- <br>From: <phxmobilbob@xxxxxxxxxx><br>To:
<techassist@xxxxxxxxxxxxx><br>Sent: Friday, October 10, 2003 5:36
PM<br>Subject: [TechAssist] Re: Magnavox RL8570,Chas
PTV380<br><br><br>><br>><br>> Thanks Bob<br>> D502 did not do it.<br>> Looks
like I'll have to order the schmatic .It is off center ,but it is<br>lacking
some bottom sweep ,could be the return line<br>> when I get it fixed I will
post<br>> Bob Searcy<br>><br>><br>><br>> --- On Fri 10/10, Gemini Computer
& TV < geminitv@xxxxxxxxxxxxxxxx ><br>wrote:<br>> From: Gemini Computer & TV
[mailto: geminitv@xxxxxxxxxxxxxxxx]<br>> To: techassist@xxxxxxxxxxxxx<br>>
Date: Fri, 10 Oct 2003 09:34:03 -0400<br>> Subject: [TechAssis
> t] Re: Magnavox RL8570,Chas PTV380<br>><br>> Sounds like you have a bad
D502 on the INTERFACE board in the V-Hi line.<br>It<br>is part# 483513037048
and it is between R590 (68K - off the base of<br>Q523)<br>and R560 (2.2K).
The physical location of this diode is on the edge<br>of the<br>board in the
middle just above J504. Try replacing this diode and<br>let us<br>know if
that took care of it. Of course, you will now need to<br>readjust
it<br>since you played with the adjustments.<br><br>Bob Waterman,<br>CET®
#RI-28<br>Master Technician License #9109<br>Service Manager /
Parts<br>Manager<br>Gemini Computer, TV, &
Security<br>Alarms<br>(508)695-7302<br>(508)695-7769<br>FAX<br>geminitv@bell
atlantic.net<br>geminitv@xxxxxxx<br>www.geminicomputertv<br>securityalarms.c
om<br><br><br>----- Original Message -----
<br>From:<br><phxmobilbob@xxxxxxxxxx><br>To:
<techassist@xxxxxxxxxxxxx><br>Sent: Friday,<br>October 10, 2003 9:01
AM<br>Subject: [TechAssist] Magnavox RL8570,Chas<br>PTV380<
> br><br><br>><br>><br>> HI ALL<br>> Magnvox PTV380 , can not
get<br>Vertical center. Have<br>> no Schmatic working<br>from bits and
pieces of other s Schmatic's<br>><br>I'v changed the Vert IC ,checked
voltages around the vert IC,all look<br>good<br>.<br>> Have +20 ,-20 at conv
PRW Supply, +12,-12 at the conv<br>BD.<br>> The more checks and Adj I make ,
Looks more like some thing wrong<br>in Vert<br>IC Section . missing bottom
portion of sweep with a trapazode<br>effect.maybe I<br>should try another
Vert IC .<br>> Just checked D552 off<br>pin 1 of Vert IC. Is this doide
paralleled with a<br>resistor .getting a bad<br>read on this .<br>> If
Anybody has seen this problem or has any ideas I<br>would
sure<br>appreciate.Anybody have a schmatic for this PTV380<br>><br>It<br>>
Thanks Bob Searcy<br>><br>> Exellent
TV<br>><br>><br>><br>><br>><br>_____________________________________________
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