[TechAssist] Re: RCA PTK178L2B
- From: "Shoreline Electronics" <jstielau@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 31 Aug 2004 08:05:33 -0400
Tips a plenty! The CTC178 and 179 are similar sets.
Q4801 = 214641 = IRF730 fet = ECG67 .............according to these tips.
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Text pasted from WinSTIPS 2.0
http://www.ServiceSoftware.com
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RCA CTC178
Bowed In On Sides
C. P. Electronics
Found Q4801 Charred And Open R4813 910 Ohm 1/2 Watt. Replace Q4801 Getting
Real Hot. Found Bad Connections On Cr4401.
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RCA CTC179
Dead / Fuses Ok / Then Bowed And Too Wide
Arundel Tv
Found C4406 2.2 @ 200 V Exploded And C4407 Bulged (214753)
Cr4402 Shorted (Ecg 580)
This Got The Set Running, With Bowed Sides. Then Found Q4801 (Irf730)
Shorted, Subs To Ecg 67.
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RCA CTC179
Horizontal None. Line Up And Down Screen
Electric Medic; Perry Bower 05/20/2004
C4407 Bulged, .55/250v C4406 Blown Apart, 2.2/ 200v, Then Had No
Pincushion, Q4801 Shorted. The Fet Mounted On Heat Sink.
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RCA CTC179
Pincushion Bad
Technos
Q4801 214641
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RCA CTC179
Pincushion Not Working
Jnm
Q4801 And Q4802
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RCA PTK178
Pincushion - Hourglass On Side Of Picture
Shannen'S Electronics
Measured Following Voltages: Q4801 Drain (11.4v), Gate (.4v) U4801 Pin 2
(4v) Pin 3 (4.6v). Found C4408 (10uf/50v Bipolar) Cracked On One End.
Resoldered Capacitor And Restored Normal Pincushion With The Following
Voltages: Q4801 Drain (19.9), Gate (2.1) U4801 Pin 2 (4.5v) Pin 3 (4.7v).
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RCA PTK178
Width - Drawing In On Sides
Mcgregor Tv Service
Q4801 Pin Switch Short Part # 214641
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==========================
Jeff Stielau
Shoreline Electronics Repair
344 East Main Street
Clinton,CT 06413
860-399-1861
860-664-3535 (fax)
jstielau@xxxxxxxx
========================
"If you push something hard enough it will fall over."
Fudd's First Law of Opposition - Sir Sidney Fudd
----- Original Message -----
From: "markbrock" <markbrock@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, August 30, 2004 10:19 PM
Subject: [TechAssist] RCA PTK178L2B
> pincushion problems, found Q4801 and R4813 burnt to a crisp, anyone have
> the part numbers, hopefully generic so I can rob one and see if this is
the
> only problem or a tip would be nice, works other than pincushion,
sides
> mainly thanks for the input
> brock
> Brock Electronics
> R.R.4 box 237
> 5208 cr.3385
> Independence Ks. 67301
> 620-331-0235
> fax 331-7191
>
> markbrock@xxxxxxxxxxxxx
> Zenith*Philips*Peavey*Fender*Crate
> we work on all brands,makes,models
> of anything that plugs in the wall
>
>
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