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27X602-00BB Golden Screwdriver    
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Ker
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PostPosted: Fri Mar 09, 2007 10:45 pm    Post subject: 27X602-00BB Golden Screwdriver Reply with quote

Hello all,
Working on a Magnavox model 27TS52, with chassis 27X602-00BB. This unit came in DOA, with positive evidence of the Golden Screw Driver. So far, i've found besides the normal wrong fuse and such from the previous repair attempt, a blown cap in the HV section, which got replaced, a Blown HOT, which also got replaced. Unit is still dead. I've got no prints of any type for this unit.

Any Help would be appreciated such as guidence on my next move. I'm checking diodes and other caps.

Thanks in advance,
Ker
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PostPosted: Fri Mar 09, 2007 10:45 pm    Post subject: Reply with quote

well most likely its blown the power supply pretty good if it had a golden
nugget in there.
Ker
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PostPosted: Fri Mar 09, 2007 10:46 pm    Post subject: Reply with quote

It didn't physically have a piece of driver in it, this phrase is from the old paper that used to hang in my shop which pertained to the tech always having work as long as there were customers out there with screwdrivers.

The Power up to the main filter cap is present. I just don't have the print to chase it down to see what voltages I should have elsewhere on the board. A print would make this job much easier.

Ker
Dennis
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PostPosted: Fri Mar 09, 2007 10:46 pm    Post subject: Reply with quote

REPLACE C423 (100MFD@200V) and R432(1k@0.5w)
John
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PostPosted: Fri Mar 09, 2007 10:46 pm    Post subject: Reply with quote

Which fuse are you stating the glass fuse or the chemical fuse. Look for a
2.5 amp chemical fuse. May be open.
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Peggs
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PostPosted: Fri Mar 09, 2007 10:47 pm    Post subject: Reply with quote

according to WinStips,
this unit uses the dreaded C432 100uF/250v...replace C431 also,near the 130v Regulator.
Q400 should have 130v on it's Emitter.
There is a Circuit Protector type fuse that opens if the HOT is Shorted... F401 ???(near the Main Filter Cap)

Peggs
Ker
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PostPosted: Fri Mar 09, 2007 10:47 pm    Post subject: Reply with quote

Thanks guys,
I Found the C432, HOT and checked Q400 on the first pass. That little F401 was the guy that got me. I over looked that like a dumb *ss. Well, this does happen from time to time. Set is up and running, with a temp fuse in place until I get some more Pico's in.

Thanks again for all the help!

Ker
kuhurdler



Joined: 28 Dec 2006
Posts: 2879
Location: Overland Park, KS

PostPosted: Tue Sep 08, 2009 11:45 am    Post subject: Golden Screwdriver Reply with quote

Subject: The Golden Screwdriver


Once upon a time, a young lad was born without a belly button. In its
place was a golden screw. All the doctors told his mother that there
was nothing they could do. Like it or not, he was stuck with it. All
the years of growing up was real tough on him, as all who saw the
screw made fun of him. He avoided ever leaving his house and thus,
never made any friends.

One day, a mysterious stranger saw his belly and told him of a swami
in Tibet that could get rid of the screw for him. He was thrilled. The
next day he took all of his life's savings and bought a ticket to
Nepal. After several days of climbing up steep cliffs, he came upon a
giant monastery. The swami knew exactly why he had come. He was told
to sleep in the highest tower of the monastery and the following day
when he awoke, the screw would have been removed.

The man immediately went to the room and fell asleep. During the night
while he slept, a purple fog floated in an open window, bearing in its
mist, a golden screwdriver. In just moments, the screw-driver removed
the screw and disappeared out of the window.

The next morning when the boy woke, he saw the golden screw laying on
the pillow next to him. Reaching down, he felt his navel, and there
was no screw there!

Jubilant, he leaped out of bed, but in seconds, his butt fell off.

The moral to this is, "Don't screw around with things you don't
understand or you'll lose your a$$"
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