ICD-PX820, ICD-PX820D, ICD-PX820M - Sony Audio Service Manual (repair manual)

2010D04-1

© 

2010.04

Capacity (User available capacity)
2 GB (approx. 1.8 GB =1,929,622,016 Byte)
A part of the memory capacity is used as a
management area.

Maximum recording time
The maximum recording time of all the folders
is as follows.

22 hr. 15 min. 33 hr. 25 min. 89 hr. 15 min.

LP mode
535 hr. 55 min.

(hr. : hours/min. : minutes)

Frequency range
•  SHQ : 75 Hz - 20,000 Hz
•  HQ : 75 Hz - 17,000 Hz
•  SP : 75 Hz - 15,000 Hz
•  LP : 80 Hz - 3,500 Hz

Bit rate and sampling frequency
for MP3 fi les*

1

•  SHQ : 44.1 kHz, 192 kbps
•  HQ : 44.1 kHz, 128 kbps
•  SP : 44.1 kHz, 48 kbps
•  LP : 11.025 kHz, 8 kbps

Bit rate: 32 - 320 kbps, VBR
Sampling frequencies: 
 16/22.05/24/32/44.1/48 

kHz

*

1

  The playback of MP3 fi les recorded using 

 

the IC recorder is also supported.

 

Not all encoders are supported.

Speaker
Approx. 28 mm (1

 1/8

 in.) dia.

Input/Output
•  Microphone jack (minijack, stereo)
  – input for plug in power, minimum input
    level 0.5 mV, 3 kilohms or lower impedance
  microphone
•  Headphone jack (minijack, stereo)
  – output for 8 - 300 ohms headphones
• USB connector
  – High-Speed USB compatible

Playback speed control (DPC)
+100% to –50%

Power output
300 mW

Power requirements
Two LR03 (size AAA) alkaline batteries
(supplied): 3.0 V DC
Two NH-AAA rechargeable batteries (not
supplied): 2.4 V DC

Operating temperature
5˚C - 35˚C (41˚F - 95˚F)

Dimensions (w/h/d) (not incl.
projecting parts and controls) (JEITA)*

2

37 × 111 × 21.2 mm (1

 1/2

 × 4

 3/8

 × 

27/32

 in.)

Mass (JEITA)*

2

Approx. 71 g (2

 1/2

 oz) including LR03 (size

AAA) alkaline batteries

*

2

  Measured value by the standard of JEITA

 

(Japan Electronics and Information

 Technology 

Industries 

Association)

Supplied accessories
IC Recorder (1)
LR03 (size AAA) alkaline batteries (2)
USB connecting cable (1)
Application Software, Digital Voice Editor 
(CD-ROM)
Application Software, Dragon 
NaturallySpeaking® (DVD-ROM)*
Stereo headphones* (1)
Carrying pouch* (1)
Stereo microphone with shift-clip* (1)
Operating Instructions

* The some of the software, stereo headphones,
  carrying pouch and stereo microphone with
  shift-clip are supplied with some models in
  some regions only.

Design and specifi cations are subject to
change without notice.

Note:
Be sure to keep your PC used for service and 
checking of this unit always updated with the 
latest version of your anti-virus software.
In case a virus affected unit was found during 
service, contact your Service Headquarters. 

1-1.   Disassembly Flow ...........................................................   3
1-2.   Battery Case Lid .............................................................   3
1-3.   Case (Front) Assy, Speaker (SP101) ...............................   4
1-4.   Complete Main Board .....................................................   5
1-5.  Liquid Crystal Display Panel (LCD101), Main Board ...   5

TEST  MODE 

 ............................................................   6

3-1. Block 

Diagram 

................................................................  11

3-2.  Printed Wiring Board –Main Section (1/2)– ...................   12
3-3.  Printed Wiring Board –Main Section (2/2)– ...................   13
3-4.  Schematic Diagram –Main Section (1/5)– ......................   14
3-5.  Schematic Diagram –Main Section (2/5)– ......................   15
3-6.  Schematic Diagram –Main Section (3/5)– ......................   16
3-7.  Schematic Diagram –Main Section (4/5)– ......................   17
3-8.  Schematic Diagram –Main Section (5/5)– ......................   18

4-1.  Case (Front) Section .......................................................   28
4-2.  Case (Rear) Section ........................................................   29

  ..............................   30

Accessories are given in the last of the electrical parts list.

UNLEADED  SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution:  Some printed circuit boards may not come printed with 

the lead free mark due to their particular size)

Unleaded solder has the following characteristics.
•  Unleaded solder melts at a temperature about 40 °C higher 

than ordinary solder.

 

Ordinary soldering irons can be used but the iron tip has to be 
applied to the solder joint for a slightly longer time.

 

Soldering irons using a temperature regulator should be set to 
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if 

the heated tip is applied for too long, so be careful!

• Strong 

viscosity

 

Unleaded solder is more viscous (sticky, less prone to fl ow) 
than ordinary solder so use caution not to let solder bridges 
occur such as on IC pins, etc.

•  Usable with ordinary solder
 

It is best to use only unleaded solder but unleaded solder may 
also be added to ordinary solder.

NOTES  ON  CHIP  COMPONENT  REPLACEMENT
•  Never reuse a disconnected chip component.
•  Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

FLEXIBLE  CIRCUIT  BOARD  REPAIRING
•  Keep the temperature of soldering iron around 270 °C during 

repairing.

•  Do not touch the soldering iron on the same conductor of the 

circuit board (within 3 times).

•  Be careful not to apply force on the conductor when soldering 

or unsoldering.

Note: Follow the disassembly procedure in the numerical order given.

•  This set can be disassembled in the order shown below.

1 claw

2 claw

3 battery case lid

2 two screws

7 two screws

8 bracket (speaker)

9 bracket (speaker)

0 Remove the two solders.

qa speaker (SP101)

3 two claws

4 two claws

5 two claws

6 case (front) assy

1 tapping screw