Continued from [LCD TVs Teardown] Only 2 Substrates Found Inside [Part 2]
After breaking down the Bravia KDL-32J5, Sony's energy-saving LCD TV, Nikkei Electronics Teardown Squad moved on to disassemble Dynaconnective's 32-inch DVD player-equipped LCD TV, the DY-32SDDB, featuring a low price of ¥49,800 (approx US$517).
Aeon Co Ltd, one of the largest distributors in Japan, launched the DY-32SDDB Feb 20, 2009, in a limited release of 15,000 units. And they were sold out in a few days. In terms of pricing, the TV is ¥30,000 to 40,000 cheaper than 32-inch LCD TVs manufactured by other major Japanese TV makers.
It is equipped with an LCD panel made by Samsung Electronics Co Ltd. Dynaconnective purchased a large amount of the panels at a low price when Samsung had an excessive inventory of the panels after the Lehman shock in 2008.
The LCD panel features a resolution of 1,366 x 768, a luminance of 500cd/m2 and a contrast ratio of 3,000:1, which are normal specifications for a 32-inch LCD TV.
Before breaking down the TV, we compared its image quality with that of the Bravia KDL-32J5.
"The Bravia has slightly better image quality, but there is little difference for general users," an engineer from a Japanese TV manufacturer said. However, he added, "The image qualities of low-priced LCD TVs are not worth discussing."
Too many distribution cables
We wrapped up the discussion of the image qualities and started to tear down the DY-32SDDB. We found a significant difference from the KDL-32J5 at first glance after removing the back chassis. To put it simply, there are so many distribution cables inside the DY-32SDDB that it looks messy in contrast to the well-organized inside of the KDL-32J5.
"When there are this many cables, a large amount of EMI (electro magnetic interference) is generated," an engineer from a Japanese TV manufacturer said. "Did they take enough measures against this problem?"
There are six substrates found inside the chassis. On the back of the LCD panel are a signal processing board, tuner circuit board, power supply board, inverter circuit board for the backlight and timing controller board for the LCD panel. A B-CAS card slot board is located on the back chassis.
"Japanese makers would never make this kind of design," an engineer said. "Its production efficiency must be very low."