SONY MCS50 - Service Manual Immediate Download

SERVICE MANUAL

PERSONAL NETWORK PLAYER

AEP Model

SPECIFICATIONS

MC-S50

Ver 1.0 2001.03

9-873-098-11

Sony Corporation

2001C0500-1

Audio Entertainment Group

2001.3

General Engineering Dept.

Audio specifications

Frequency response

20 20,000 Hz

Signal-to-noise ratio (S/N)

85 dB

Memory capacity

64 MB (including the system software:

61.1 MB available for music)

Available file format

ATRAC3

MP3

Bit rate*: 32256 kbps

Sampling rate: 32/44.1/48 kHz

* Variable bit rate files are not

supported. Bit rate higher than 128

kbps is not guaranteed when you

select the sampling rate 32 or 48 kHz.

WMA**

Bit rate: 64160 kbps

**The files applied with the Microsoft

Windows Media Right Manage are

not supported.

Output

Headphones jack

Stereo mini jack

Connector (special mini jack)

USB 1.0 compliant

General

Power requirements

LR03 (Size AAA) alkaline battery

× 1

USB bus power

Battery life

Approx. 6 hours (varies depending on

bit rate, volume, etc.)

Operating temperature

5°C to 35°C (41°F to 95°F) (not

condensed)

Environment temperature

20°C to 60°C (4°F to 140°F) (not

condensed)

Supplied accessories

· LR03 (Size AAA) alkaline battery (1)

· Headphones (1)

· Headphones/earphones

extension cord (1)

· Neck strap (1)

· USB cable (1)

· CD-ROM (OpenMG Jukebox

installation disc) (1)

· MC-S50 Operating Instructions (1)

· OpenMG Jukebox Operating

Instructions

Design and specifications are subject to change

without notice.

(1)

Power consumption

Approx. 145 mW

Dimensions (approx.)

Approx. 22.4

× 99.0 × 25.9 mm (29/

× 4

×1 inches) (w/h/d)

Mass

Approx. 33g (1.2 oz ) (including

battery)

MC-S50

TABLE OF CONTENTS

SERVICING NOTES .................................................. 3

GENERAL ...................................................................... 9

DISASSEMBLY

3-1. Disassembly Flow ............................................................ 10

3-2. Case Assy, Upper ............................................................. 10

3-3. Power Board ..................................................................... 11

3-4. "LOGIC Board", "AUDIO Board",

"FLEXIBLE (JACK) Board, Jack (J301)" ...................... 11

3-5. "LOGIC Board",

"Display Panel, Liquid Crystal (LCD901)" .................... 12

DIAGRAMS

4-1. Block Diagram ................................................................. 13

4-2. Note for Printed Wiring Boards and

Schematic Diagrams ........................................................ 14

4-3. Printed Wiring Board LOGIC Board ........................ 14

4-4. Schematic Diagram LOGIC Board .......................... 15

4-5. Printed Wiring Board AUDIO Board ....................... 16

4-6. Schematic Diagram AUDIO Board .......................... 17

4-7. Printed Wiring Board POWER Board ...................... 18

4-8. Schematic Diagram POWER Board ......................... 19

4-9. IC Pin Function Description ............................................ 22

EXPLODED VIEWS

5-1. Upper Case Assy .............................................................. 26

5-2. Board Assy ....................................................................... 27

ELECTRICAL PARTS LIST ................................ 28

Flexible Circuit Board Repairing

· Keep the temperature of the soldering iron around 270 °C dur-

ing 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.

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.

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)

: LEAD FREE MARK

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 flow) 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.

Sony, VAIO, the VAIO logo, Music Clip, OpenMG

and the OpenMG logo are trademarks of Sony

Corporation.

Microsoft, Windows, Windows NT, Windows

Media, Windows Millennium Edition and their

logos are trademarks or registered trademarks of

Microsoft Corporation in the United States and/or

other countries.

US and foreign patents licensed from Dolby

Laboratories.

All other trademarks and registered trademarks are

trademarks or registered trademarks of their

respective holders.

MC-S50

1-1.

Introduction

This document describes the "operation check for inspection (Test mode)" and "adjustment after board replacement for repair".

In performing these works, connect this set to the PC via a USB cable and use the following tool.

Tool list

Ref. No.

Tool name

Part code

Application

Service Tool 9140 (FD)

J-2507-037-1

Board check (Test mode) and readjustment after board replacement

1-2.

Board Repair

1. In performing the work, the set should be in a complete state (all components assembled).

2. Install the "OpenMG Jukebox" and "WMP7 Plug-in" (CD-ROM) in the PC in advance.

3. Do not start up other applications in the PC.

4. This set has the Test mode, and the use of exclusive application (Service Tool) on the PC side enables various function checks and the

voltage adjustment.

5. For the LOGIC board in this set, if either part listed in Table 1 is faulty, be sure to replace the board block. Also, when a part on the

POWER board was replaced or a combination of LOGIC board and POWER board was changed due to the board replacement,

perform 1-5 "Adjustment When Board was Replaced/Repaired".

6. The data in Table 1-2 have been written to the LOGIC board.

7. In repairing other than above parts, repair as usual.

Table 1-1.

Board name

Ref. No

LOGIC board

IC601, IC602, IC603, IC901

Table 1-2.

Board name

Stored data

LOGIC board

Music data, Battery adjustment value, Equalizer initial values, CODEC programs, and ID/IK codes

1-3.

Operation Check for Inspection (Test Mode)

Precautions

1. Be sure to remove the battery from this set. (The power is supplied via USB cable)

Operating the set in the Test mode with the battery loaded could clear necessary information.

2. If operation check was performed for inspection, execute "Play Info Initialize" in qd (see page 7) to return respective functions to

initial positions (see Table 1-5 on page 7). In such a case, record current position of each function before executing "Play Info

Initialize" in qd, if necessary.

SECTION 1

SERVICING NOTES

MC-S50

Work procedure

Preparation:

1. Make sure that no battery is loaded in the set.

2. Start up the test mode "apollo_service.exe" of the service tool (J-2507-037-1) from the PC, and check that the following screen

appears.

3. Connect PC to this set with a USB cable. Check that the block 1 of the following screen "open", and "1PC" is displayed on the LCD

of the set. (The block 1 will "close" if the set is disconnected again)

At this time, a sine wave is outputted from the headphone. Also, the model name is displayed in the block qd of the screen.

Note: If the block 1 does not "open", the circuits in LOGIC board will be faulty. Audio signals are outputted from the reference signal in the DSP of

the set.

MC-S50

Operational description of Test mode

Audio Block Function Check

Clicking the UP or Down button in block 2 of the screen allows you to check with various output frequencies. Also, clicking the UP or

Down button in block 3 can check variations of volume. Clicking the L, Stereo, R, or Mute button in block 4 can change audio output

status.

Battery Threshold Value Reading and Measurement

Connect an exclusive USB cable to the set, and available battery threshold values (converted values corresponding to voltage values)

written to the set at the shipment will be displayed at 5. (See Table 1-3)

These threshold values are inherent values of the set, but if they were readjusted during the board repair, newly set threshold values

(converted values corresponding to voltage values) are displayed.

Table 1-3.

Condition

OFF

Scale 1

Scale 2

Scale 3

Voltage set value

1.00 V

1.15 V

1.25 V

1.35 V

Converted value (ref.)

320

368

400

432

Note: The threshold values (converted values corresponding to voltage values) are different every set.

LCD Test

Clicking FULL (full lit), COL1 (column 1), COL2 (column 2), or OFF (full off) in block 8 results in all ON, column 1 ON, column 2 ON,

or all OFF of the LCD on the set respectively.

CODEC Info Check

The CODEC programs and their versions written to the set can be checked. (block 9)

The CODEC programs written to the set at the shipment are "MP3", "ATRAC3", and "WMA" and their versions are as listed below.

(Versions will vary if updated)

Program No.

Name

Version

CODEC1

MP3

CODEC2

AT3

CODEC3

WMA

CODEC4

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