Harmon Kardon HD970:inside view - diyAudio
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Old 21st July 2007, 01:35 AM   #1
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Thumbs up Harmon Kardon HD970:inside view

The overall view.Note that compare to earlier production,this one use a
"two-part" ATAPI drive as opposite to South Korea's DVS drive.

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Old 21st July 2007, 01:37 AM   #2
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The R-core transformer with 3 separate windings:2 for analog stages and 1 for the others.

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Old 21st July 2007, 01:38 AM   #3
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Sanyo's SF-HD65 laser pick-up unit,which can be found inside many cheap DVD players.

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Old 21st July 2007, 01:41 AM   #4
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The ATAPI board,which almost equivalent to a normal DVDROM without:
-Master/Slave/Cable Select jumper setting,
-Analog Audio Output,
-Digital Audio Output.

This one use a VOS chipset rather than the popular MTK chipset.

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Old 21st July 2007, 01:46 AM   #5
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The 'heart' of the machine:Analog Devices' Blackfin audio DSP.Note that
the adjacent Xilinx's FPGA.

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Old 21st July 2007, 01:53 AM   #6
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The SPDIF IN/OUT and DAC section.This CDP comes with digital inputs and putputs both on coaxial and optical,with AKM's AK4117 serves as input receiver and a AKM4103 as transmitter.

The DAC section employs a AD1955.

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Old 21st July 2007, 01:57 AM   #7
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The analog stages:OP275s as I/V converters and OPA2134s as low-pass filter/DC servo.Diamond buffers are also found at the final output stages.

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Old 21st July 2007, 02:01 AM   #8
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Power supply section:Standard adjustable linear regulators for the analog stages,low-dropout for the digital circuits and switching regulators for the ATAPI drive.

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Old 21st July 2007, 09:17 AM   #9
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Quote:
Originally posted by Leolabs
[B] Xilinx's FPGA.
CPLD not FPGA.
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Old 21st July 2007, 09:24 AM   #10
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thanks for the pictures Leolabs!
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