Acquired Electronics360

Television Hardware

Samsung LN-R408DX LCD Television Teardown

30 November 2012
The following is an overview of a teardown analysis conducted by IHS Technology Teardown Services.

Overview

The LN-R408DX is a 40" wide HDTV/DCR LCD television from Samsung, that represents one model of a range of 8 models of LCD TVs currently featured from Samsung ranging from 15" to this 40" (largest, apparently) model. Pricing availability ranges from just below $2,000 to over $5,000 from US-based online retailers as of Q1, 2006.

Samsung LN-R408DX LCD Television_(iSi) - Tuner PCB MountedSamsung LN-R408DX LCD Television_(iSi) - Tuner PCB Mounted
Cost Notes

Main Cost Drivers (Including LCD panel. These are totals and account for the total value of components when multiples are concerned.)

  • $770.00 LCD Display - Samsung - LTA400W2-L01
  • $25.00 CCFL Driving Inverter Transformers
  • $22.50 Miscellaneous DRAM & Flash
  • $14.65 Digital Natural Image Engine Chipset - Samsung
  • $11.75 Tuner - Samsung
  • $14.70 DTV MPEG Decoder and CPU - ARM Powered, Chip Set with S3C2800/ S5H2010 - Samsung
  • $9.60 MOSFET - Dual, N-Channel, 40V - Vishay - Siliconix

All prices in this analysis represent iSuppli's cost estimate at the time of initial publication of this teardown.

Design Notes

This LCD is fairly distributed in terms of discrete PCB assemblies, however the core AV processing all takes place on the LN-R408D AV Board. The next largest boards, and also next largest cost drivers are the two identical LCD driver (CCFL inverter) boards positioned to the left and right of the screen ?these boards serve a primarily power distribution fucnction and are dominated by specialty magnetics and power discretes. There are two separate power supply boards, one that appears to be possibly an off-the-shelf 35W swicthmode supply from Dong Yang Instrument Co. (China), and a much larger custom power supply. One other significant board worth mention is the T-VII board which features a Samsung LCD controller core chip.

LN-R408D AV Board

  • DTV MPEG Decoder - Samsung - S5H2010
  • DTV CPU - Samsung - S3C2800
  • Digital Natural Image Engine - Samsung - STP02 &SDP43
  • Micronas - MSP4440G - Audio DSP - 44kHz
  • SDRAM - 128MB (2M x 16Bit x 4 Banks) ?Samsung (x2)
  • SDRAM - 64MB (512K x 32Bit x 4 Banks) ?Samsung (x2)
  • SDRAM - 128MB (1M x 32Bit x 4 Banks) GDDR - Samsung
  • Flash - 128MB ?Intel - TE28F128J3C150
  • Receiver - HDMI/ DVI - Silicon Image - SiI 9993CT100
  • Microcontroller - Samsung - S3X9XXX
  • Microcontroller - Cable Card / DVB Common Interface Controller - SCM Microsystem - CIMaX-SP2

Samsung LN-R408DX LCD Television_(iSi) - LN-R408D (Main AV) AV Board - TopSamsung LN-R408DX LCD Television_(iSi) - LN-R408D (Main AV) AV Board - Top
Samsung LN-R408DX LCD Television_(iSi) - LN-R408D (Main AV) AV Board - BottomSamsung LN-R408DX LCD Television_(iSi) - LN-R408D (Main AV) AV Board - Bottom
LCD DRV PCBs

  • Vishay-Siliconix - Si4942DY - MOSFET - Dual, N-Channel, 40V
  • International Rectifier - IR2184S - Half Bridge Driver

Power Supply PCB

  • Power MOSFET - 500V, 20A - International Rectifier - IRFB20N50K
  • Schotky Rectifier - 100V, 2x20A - ST Microelectronics - STPS40H100CW

Samsung LN-R408DX LCD Television_(iSi) - Power Supply PCB MountedSamsung LN-R408DX LCD Television_(iSi) - Power Supply PCB Mounted

T-VII (LCD Controller) Board

  • LCD Controller - Samsung - LRX4222T2
  • SDRAM - Samsung - 128 M-Bit DDR, (1M x 32Bit x 4 Banks)
  • Op Amp - Quad, 12 MHz, Rail-to-Rail Input-Output ?Intersil - EL5420CRZ

Samsung LN-R408DX LCD Television_(iSi) - T-VII PCB (LCD Controller Board) - BottomSamsung LN-R408DX LCD Television_(iSi) - T-VII PCB (LCD Controller Board) - Bottom



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