[TechAssist] Re: Philips 25"ctv Model TS2574/ 25B800 chasis/No vertical
- From: "Intrepid Video Support" <support@xxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 12 Mar 2004 14:51:37 -0500
Mando,
Here's what I have from Tech Repair CD:
Philips\27B8\Shutdown\\\27B8\D409 - off pin # 5 of IFT(4835 130 37094 an ECG
580 type)\R420 - off pin # 5
of IFT(1 ohm 1/2w 5% part no 4835 116 57109)\R58 - on CRT module(22 ohms 1/2w
5% 4835 116 57708)\small
trace running to pin # 4 of the Vertical output IC was also open*Also solder
vertical IC or replace\\\\\
MAGNAVOX \27TS54C101\DEAD\Black screen except flicker of light at edges
& could faintly see that
vertical was collapsed to about 2 at bottom of screen\with faint video visible
in pix. After removing
chassis-set failed to start & HV would kick to 12kv\27B800-Manual: 7562\IC500
(4835-209-88531)(TDA9302H)\R420 (1ohm-½w) 4835-116-57109\R420/D409 Located next
to IHVT\Replace the IC
first as resistor will immediately burn\\\\\
Good luck..
If I remember, the trace that I had lifted was in the opposite direction from
the diode relevant to the
vertical chip..off one of the other pins..There were two traces leading to the
components pin and one of
the traces were lifted.
Jeff Dougherty
Intrepid Video TV/VCR
263 S Front St
Steelton PA 17113
fax...717-564-4952
www.intrepid-video.com www.tech-repair.net
----- Original Message -----
From: "armando guerra" <birdie@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, March 12, 2004 12:02 PM
Subject: [TechAssist] Re: Philips 25"ctv Model TS2574/ 25B800 chasis/No vertical
Thats the first thing that I thought of since I've had that happen to me
before.However,I did check for continuity with my meter to all traces of the IC
and D409.
Thanks.
Mando
Birdie's TV & Electronics
Casa GRande, AZ
Intrepid Video Support wrote:
> Mando,
> If you had your iron too hot, these traces very easily lift..at the pads, yet.
> Ohn out the pads and look very closely for lifted pads.
>
> Jeff Dougherty
> Intrepid Video TV/VCR
> 263 S Front St
> Steelton PA 17113
> fax...717-564-4952
> www.intrepid-video.com www.tech-repair.net
>
> ----- Original Message -----
> From: "armando guerra" <birdie@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, March 11, 2004 3:55 PM
> Subject: [TechAssist] Philips 25"ctv Model TS2574/ 25B800 chasis/No vertical
>
> This set when powered on,would try to start but go into shutdn.I
> replaced the vertical ic TDA-9302h,D 409 (used nte 580) R420=1 ohm,and
> C557 =100\50v lytic.Now when I power the tv on,tv comes on but has just
> a line across screen (no vertical defflection).I have the manual for the
> F8 chasis but not for this B8.They are different.The +13v and the -13V
> at the ic are there.I had a known good used yoke,subbed it and made no
> difference. Can someone with the B8 chasis manual send me a print of
> the vertical ckt so that I troubleshoot this problem .Any tips ir idea's
> would also be apreciated. Thanks.
> Mando
> Birdie's TV & Electronics
> Casa GRande, AZ
> PS I made sure that the traces to the ic are ok.I have seen some come
> apart when unsoldering the ic.Also the traces to D409.
>
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