Common Emitter: mp3 player disassembly

Showing posts with label mp3 player disassembly. Show all posts

2012-09-01

Teardown: Philips SA1210 mp3 player

Teardown: TECHNIKA 1GB mp3 player

SoC: Sigmatel STMP3503

NAND: K9G8G08

2012-06-16

Teardown: Philips SA2220

2GB Flash mp3 player from 2007. In general similar to previously mentioned SA2620, both have "Desing by Perception Digital" printed on PCBs -> http://en.wikipedia.org/wiki/Perception_Digital. Major differences from user perspective would be playback time (10 h with SA2220 vs 30 h with SA2620) and display size (2 vs 3 lines accordingly).

It has smaller integration level than SA2620 so there are more reuse options.
AT1305P: step-up DC/DC converter with LDO.

WM8731LS: low power stereo codec with integrated headphone amplifier.
SM3400F SoC.
TH58NVG4D4CTG00 NAND: multi chip, 3.3V, 16 Gbit, 2 bits/cell, x8, 2kB / 256kB, 70 nm, TSOP.

2012-06-09

Teardown: Rio Carbon

MP3 player with miniature 5 GB (2.5GB to 6 GB?) HDD and lithium battery from 2004.
Quite difficult to open - lot of metal latches on back cover.
No HDD inside of this unit but rest of the hardware seems to be functional - might get carbonized.

Sigmatel STMP3550 SoC

K4S280832F: 16M x 8bit 133 MHz SDRAM - same part was used in PC 128 MB DIMMs

74LVC245: octal bus transceiver with direction pin with 5 V tolerant input/outputs (3-state)

Big lithium battery (20 hours of playback time!)

512 kbit I2C EEPROM

2012-06-07

Teardown: Samsung Yepp YP-E32 mp3 player

Back in time: Samsung's first mp3 player from 1999.
See review at: http://www.anythingbutipod.com/forum/showthread.php?t=63924.
32 MB internal Flash memory, LPT as PC interface, powered by 2xAAA, 3 lines x 10 chars + few icons B/W display, handles SmartMedia cards (up to 32 MB?).

Inside: 2 PCBs
SEC KS57P215160
MICRONAS DAC3550A - stereo I2S DAC

OKI chip - hard to identify after removing sticker

MICRONAS MAS3507D - mp3 decoder

Flash: KM29U64000T - 8M x 8 Bit NAND, 512B page, impressive 1M program/erase cycles (x4 total giving 32 MB)

Puzzling: "RSF" hybrid IC

Teardown: Philips HDD070

MP3 player from 2005 with 2 GB hard disk and FM radio. Got 6 pieces of these, all incomplete (without batteries, some case elements and mostly without hard disks).

It received quite a few negative opinions over the internet, mostly related to software and reliability, but inside it is astonishing piece of hardware. Most visible thing would be light but solid case made of AZ91D magnesium alloy (metal surface visible after scratching):

SoC: SAA7750EL

Altera EPM7064AETC100-10, 3.3V EEPROM-based CPLD, ISP via JTAG, 1250 gates, 64 macrocells, working as ATA glue logic circuit

D741649 - TIC hard disk controller

TEA5880 FM tuner

FM tuner (apart from well-known Altera PLD) is worth mentioning. This IC requires only two external components - two coils (top side) that can be also replaced with PCB traces. Coils on the bottom side just filter VCCA and VCCD. It doesn't even require external crystal (the price for this is software calibration requirement). Major drawback seems to be power consumption - according to datasheet 250 mA (typical) to 500 mA (max) from VCCD. That would give 2.5 W power dissipation at VCCD = 5V! Not sure if this is not just print error as it would consume HDD070 battery in 2 or 3 hours.

Top side:

Micron 48LC16M16A2 256-Mbit SDRAM arranged as 4 Mbits x 16 x 4 banks with a

CAS latency of 2 at 100 MHz (see: Using SDRAM on AT91SAM7SE Microcontrollers Atmel Application Note).

Big up and down switches are Panasonic EVQPWBA15 with double-action (to get the idea: one of their recommended application is shutter switch for still camera).

Keypad and headphone remote are using trick with resistance switching - more that one key can be handled by single ADC input.

PCF50605HN, power supply controller - real monster: 3 x DC/DC switching converter, 5 x linear regulator, battery charger and a lot more; produces 1.8V (ARM core), 2.4V (Flash), 3V (wake-up, CPLD, tuner), 3.3V (HDD) and 5V (LCD backlight).

Power supply section - 3 "double-C" shaped inductors visible with thick wire.

Display with integrated controller; 128x96, 2 bit greyscale.

CORNICE 2GB model 200LMTLF543 hard disk drive.

Philips HDD050, HDD055, HDD065 and HDD075 seem very similar to this player - main difference is used hard disk capacity and RAM buffer memory size.

Best of all: schematic is pretty easy to find.

Teardown: Philips SA2620, SA2640

Pendrive-style MP3 player powered by R03/AAA cell with 2 GB internal Flash memory. SA2640 is a version with 4 GB memory. It's main advantage is probably low current consumption - according to my measurement it should work an single AAA cell even longer than advertised 30 hours.
I've got 8 or 9 of these players but fixed most of them with dedicated Philips application. These two could not be fixed and their LCD was damaged also.