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Magnavox turned into an expensive Metronome - 32D700-7570    
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JohnnyZ



Joined: 04 Aug 2009
Posts: 2
Location: Mesa, AZ

PostPosted: Tue Aug 04, 2009 11:48 am    Post subject: Magnavox turned into an expensive Metronome - 32D700-7570 Reply with quote

Dear pros,

Brand: Philips Magnavox
Model: TS3258 C101
Chassis: 32D700-7570

I was watching TV and with out any provocation, it just turned off, as if it thought I had had enough! Tried turning it back on with no response. I pulled out the TV and took off the back. When plugged in, it makes a quiet electrical snap sound about one per second. Sounds like it is coming somewhere from the center of the board, hard to tell exactly where because I couldn't get my big head in there. I thought of wipping out the guitar and jamming to the beat, but decided to try and fix it (break it more) instead.

I jumped online and started reading. I found several people with issues similar, but their front power light would work or would be flashing, mine on the other hand does nothing.

I took the TV to the garage and blew off all the dust and pulled the main board. After careful scrutinizing, I see no deformed caps or blackened areas. I guess its time to start testing components, but I though one of you pros could give me a pointer as to where to start looking.

Thanks much in advance,
Johnny
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JTS1957



Joined: 21 Jan 2009
Posts: 2395
Location: Far, Far Away

PostPosted: Tue Aug 04, 2009 12:26 pm    Post subject: Reply with quote

Switched Mode Power Supply and Horizontal Output circuits are always a good place to start testing transistors and diodes. Smile
Could also have bad capacitors or Flyback.
JohnnyZ



Joined: 04 Aug 2009
Posts: 2
Location: Mesa, AZ

PostPosted: Thu Aug 13, 2009 9:41 am    Post subject: Found bad cap? Reply with quote

I started by checking the cap in 2634 which I've been told is a weak point on this model, but it looked fine and read infinity (all i have to test is a standard meter) BUT while soldering it back on I saw a small crack on cap 3908. I pulled it from the board and it measures 12.2 ohms. Im I wrong, or shouldn't it be infinity?

It is a small round dirt red cap which says "100" above some distorted symbol and "87". Can you help identify this cap?

Thanks in advance,
Johnny
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