Today we’ll be taking a look at the MG-350HD Media Centre which is as it says, is a media center with Wifi/LAN, a 3.5″ IDE hard drive, USB with lots of outputs including component/composite/DVI/audio/optical so it’s pretty packed.
At first I wondered why it was so heavy, after opening it up there is a 750GB 3.5″ hard drive – so that’s why, it’s an IDE drive.
A few screws later and one screw under the wireless card, we’re in. We’ve got a fair amount of passives on the top with our Mini-PCI wireless card and on the bottom we’ve got chips with some regulators – 3x AZ1117 LDOs, 2x AP1605 SMPS and AP1501 SMPS. There’s flat flex cable connecting the optical/S-video and the front panel. PCB date code is 22nd week of 2007.
For the IDE cable, it looks like they have an ferrite core in heat shrink for EMI and it could be the same thing they are doing on the wireless antenna cable too. It’s interesting to see the video from the PCB to the connectors, the connecting conductors are pretty large.
1. Sigma Designs Processor
A digital media processor capable of MPEG4/2/WM9/VC1/DVD decoding, supports DDR RAM, has various video outputs and an embedded 166MHz CPU – has lots more features. With 27MHz crystal and 33MHz crystal or oscillator.
EM8620L
2. Hynix 256Mbit DDR RAM x 2
HY5DU561622ETP
3. Samsung 64Mbit Flash
K8D6316UTM
4. Realtek 100Mbit Ethernet Controller
With 25MHz crystal and Atmel 93C46 1Kbit EEPROM
RTL8100C
5. Ti DVI Transmitter
With a 74LVC125D quad buffer
TFP410
6. VIA 4 Port USB2 Controller
VT6212L
7. Prolific USB2 to IDE Controller
With 12MHz crystal
PL2507
8. MT USB High-Side Power Switch
G525A2
9. Wolfson Microelectronics 24-bit 192KHz DAC
With a MOSA MS6308 Headphone Driver
WM8728
Ralink Wireless Mini-PCI Card
We have the main chip an RT2561ST, under the metal can we’ve got a 40MHz oscillator and a RT2527L. It seems to be 802.11g but I could be wrong.
Front Panel
We’ve got a Samsung 8bit 3F9454BZZSK94 MCU which has an 8bit timer, an ADC and and 1 PWM output running from an 6 MHz crystal and an IR receiver.
And that’s all.
