It looks like the problem is IC501 (TDA8172). Does this make sense? The picture returns to normal if I tap the part. I'm not an electronics person but I'm tempted to buy a part and replace it.
- posted
18 years ago
Sony KV27TS29 Sides Bow In
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- posted
18 years ago
first, check for dry joints in the area around the IC. It might be that simple....
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18 years ago
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18 years ago
It must be some part nearby, maybe even mounted on the same aluminum plate, but definitely not this IC. Your error is in the E/W circuit, this IC handles vertical deflection. Most of the time the E/W regulator transistor or some related coils will have bad solder connections.
-- Met vriendelijke groet,
Maarten Bakker.
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18 years ago
I reflowed and/or added some solder on about 12 pins around the IC. All looks well again.
Thanks
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18 years ago
i recall repairing a kv27ex about 3 years ago with this condition. there was a geometry daughterboard at the rear of the main pcb which had dry joints where it joined the main pcb. I also cleaned all the pots on it to be sure.
hope this helps, Ben