Sony MZE-300 Service manual

MZ-E300

SERVICE MANUAL

Ver 1.2 2001.12

US and foreign patents licensed from Dolby Laboratories Licensing Corporation

SPECIFICATIONS

System

Audio playing system

MiniDisc digital audio system

Laser diode properties

Material: GaAlAs Wavelength: λ = 790 nm Emission duration: continuous Laser output: less than 44.6 µW* * This output is the value measured at a distance of 200 mm from

the objective lens surface on the optical pick-up block with 7 mm aperture.

Revolutions

Approx. 700 rpm to 1,500 rpm

Error correction

ACIRC (Advanced Cross Interleave Reed Solomon Code)

Sampling frequency

44.1 kHz

Coding

ATRAC (Adaptive TRansform Acoustic Coding)

Modulation system

EFM (Eight to Fourteen Modulation)

Number of channels

2 stereo channels 1 monaural channel

Frequency response

20 to 20,000 Hz ± 3 dB

Wow and Flutter

Below measurable limits

Power requirements

One LR6 (size AA) battery (not supplied)

US Model

Canadian Model

AEP Model

E Model

Chinese Model

Model Name Using Similar Mechanism NEW

MD Mechanism Type MT-MZE300-176

Optical Pick-up Mechanism Type LCX-4E

Battery operation time

Battery life (EIAJ1))

Battery Playback

LR6 (SG) Sony Alkaline dry battery

Measured in accordance with the EIAJ (Electronic Industries Association of Japan) standard (using a Sony MDW-series Mini-disc).

When using a Sony LR6 (SG) “STAMINA” alkaline dry battery (produced in Japan).

Note

The effective battery life may be shorter than that indicated above, depending on operating conditions, the surrounding temperature, and the battery type.

Dimensions

Approx. 83.0 x 26.7 x 76.5 mm (w/h/d) (3 3/8 x 1 1/16 x 3 1/8 in.) (not including projecting parts and controls)

Mass

Approx. 83.0 g (3.0 oz) (the player only)

Supplied accessories

Headphones/earphones (1)

Design and specifications are subject to change without notice.

Approx. 33 hours

9-873-064-13

2001L0200-1

PORTABLE MINIDISC PLAYER

Sony Corporation

Personal Audio Company

Published by Sony Engineering Corporation

MZ-E300

TABLE OF CONTENTS

SECTION 1

SERVICING NOTE

Specifications ........................................................................... 1

1. SERVICING NOTE ...................................................... 2

2. GENERAL

Preparing a Power Source .................................................. 3

To Connect the Headphones/Earphones ............................ 3

Playing an MD ................................................................... 3

3. DISASSEMBLY

3-1. “Lid ASSY, Upper”, Holder ASSY ............................ 4

3-2. Mechanism Deck ........................................................ 4

3-3. Main Board ................................................................. 5

3-4. Optical Pick-up ASSY ................................................ 5

4. TEST MODE.................................................................. 6

5. DIAGRAMS

5-1. Explanation of IC Terminals ..................................... 13

5-2. Block Diagram .......................................................... 18

5-3. Printed Wiring Boards – Main Section (1/2) – ......... 19

5-4. Printed Wiring Boards – Main Section (2/2) – ......... 20

5-5. Schematic Diagram – Main Section (1/3) – ............. 21

5-6. Schematic Diagram – Main Section (2/3) – ............. 22

5-7. Schematic Diagram – Main Section (3/3) – ............. 23

6. EXPLODED VIEWS

6-1. Main Section ............................................................. 29

6-2. Mechanism Deck Section ......................................... 30

When repairing this device with the power on, if you remove the main board, this device stops working. In this case, you work without the device stopping by fastening the hook of the Open/Close detection switch (S808).

Open/Close detection switch (S808)

Note on IC replacement

If using flux on replacing IC801 etc., clean it with alcohol or equivalent, and after that, check carefully there are no dust or rags in between pins.

Especially, be sure to check between pins 4 and 5.

7. ELECTRICAL PARTS LIST................................... 31

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

Flexible Circuit Board Repairing

• Keep the temperature of the 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.

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be damaged by heat.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

À LA SÉCURITÉ!

SECTION 2

GENERAL

MZ-E300

This section is extracted from instruction manual.

MZ-E300

SECTION 3

DISASSEMBLY

• The equipment can be removed using the following procedure.

Set

“Lid ASSY, Upper”, Holder ASSY

Mechanism deck

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

3-1. “LID ASSY, UPPER”, HOLDER ASSY

Note : Holder ASSY installation

1. Attach the holes on Holder ASSY to the projections on right and left sides.

2. Attach Spring (POP/L) as shown in the figure.

Holder ASSY

Main board

Optical pick-up ASSY

Lid ASSY , Upper

Screws (1.4),MI

Move it away

from projection

Reinforcement

Spring (POP/L)

3-2. MECHANISM DECK

5 Motor flexible board

7 Screws, tapping (1.7)

Holder ASSY

Move it away

from projection

1 Screw (MD), step

Case ASSY

Mechanism deck

6 OP flexible board

Move it away

from projection

Reinforcement

Case ASSY

3 Claw

3-3. MAIN BOARD

Note : On installation of main board, adjust the position of

both switch (S809) and knob (HOLD).

MZ-E300

1 Screws, tapping (1.7)

Main boar

3-4. OPTICAL PICK-UP ASSY

Optical pick-up ASSY (LCX-4E)

2 Claw

Knob (HOLD)

Washer

Gear (SA)

Screw (MI 1.4)

Spring, thrust deten

MZ-E300

IC501

SECTION 4

TEST MODE

4-1. GENERAL

• When entered in the TEST MODE, this set provides the Overall

Adjustment mode which allows CD and MO discs to be automatically adjusted. In the Overall Adjustment mode, performs adjustments in sequence automatically, and displays the faulty location if any fault is found. In the Manual mode, selected adjustments can be performed automatically.

• Operations in the Overall Adjustment mode can be performed

either via the main unit, or the keys of a remote control unit. Note that this device does not include a remote control unit. Therefore, since no connection terminals for a remote control are provided either, a connection device must be used in order to allow a suitable remote control unit to be connected.

Connection

Following parts are required Remote commander: RM-MZ2N (1-418-493-71)

After RM-MZE1 applicable to 2.4V (Not applicable to remote commanders before RM-MZE1).

Jack: 7 poles jack for phones/remote commander (1-793-288-61)

JACK: 1-793-288-61

R_KEY

R_DATA

R_VDD

R_GND

Lead wires: 4 leads

4-2. SETTING THE TEST MODE

4-2-1. How to set the TEST MODE

To set the TEST MODE, three methods are available. 1 Solder bridge and short BP801 (TEST) on the main board.

Then turn on the power.

MAIN BOARD (SIDE A)

TP809

TP816

BP801 (TEST)

TP808

C806

R907

R830

C810

R803

X801

FB801

C805

BP801

OPEN : Normal mode SHORT : Test mode

R82

MAIN BOARD (SIDE A)

4321

12 34

TP803

TP804

TP805

TP802

TP806

TP951

TP801

2 Using a pair of tweezers or similar tool short-circuit TP804 and

TP805 on the main board and turn on the power.

MAIN BOARD

TP804 TP805

(SIDE A)

TP803

TP802

TP804

TP805

TP806

3 In the normal mode, operate the keys on the set and those on the

remote control as specified below: Turn on HOLD switch on the set. Holding down x (STOP) key on the set, press the keys on the remote control in the following sequence:

> N t > N t . t . t > N

t . t > N t . t X t X

TP801

TP951

MZ-E300

Ver 1.2 2001.12

4-2-2. Operations when the TEST MODE is set

When the TEST MODE is entered, the system switches to the display check mode within the TEST MODE. From this mode, the other Test modes can be accessed. When the TEST MODE is set, the LCD repeats a cycle of the following displays:

Main unit LCD

1SHUFF

AVLS BASS

888:88

130

All on

All off

Microprocessor version display

Remote control LCD

4-3. TEST MODE STRUCTURE

* Manual mode operation can only be performed via the remote

control unit. Use the connection tool to connect the remote control unit. The display of the main unit shows “Adj”.

Test Mode (Display Check Mode)

key

Manual Mode

key

Press and hold

down

key

(Remote control only)

key

Display segment check mode

keyRelease

Servo Mode

Audio Mode

Power Mode

OP Alignment Mode

(Main unit only)

888

1SHUFF PGM

SOUND 1 2 BASS 1 2

All on

All off

008 V1.300

Microprocessor version display

The remote control display varies with the type of remote control unit used. (Example shown: RM-MC10L)

• The current display is retained as long as either the PLAY MODE/DISPLAY key on the main unit or the PLAY MODE key on the remote control unit is pressed and held.

4-2-3. How to release the TEST MODE

When method 1 was used: Turn off the power and open the solder bridge on BP801 on the main board. Note: The solder should be removed clean. The remaining solder

may make a short with the chassis and other part.

When method 2 or 3 was used: Turn off the power. Note: If electrical adjustment (see page 8) has not been finished

completely, always start in the test mode. (The set cannot start in normal mode)

key

Overall Adjustment Mode

key

4-4. MANUAL MODE

4-4-1. Outline of the function

The Manual mode is designed to perform adjustments and operational checks on the set’s operation according to each individual function. Usually, no adjustments are made in this mode. However, the Manual mode is used to clear the memory before performing automatic adjustments in the Overall Adjustment mode.

* Manual mode operation can only be performed via the remote

control unit. Use the connection tool to connect the remote control unit. The display of the main unit shows “Adj”.

4-4-2. How to set the Manual mode

1. Set the TEST MODE and press + key to set the Manual mode.

Remote control LCD display

000 AAAS CC

2. When the test mode display shows “100”, “200”, “300”, “500”, “600”, “700”, “800”, or “900”, the optical pickup can be moved inside and outside of the SLED perimeter by continuously pressing the ( > N or . keys on the main unit.

MZ-E300

3. Each test item is assigned with a three-digit item number. The 100th place is a major item, 10th place is a middle item, and unit place is a minor item.

key : 100th place of mode number increase

key : 100th place of mode number decrease

keykey

key : 10th place of mode number increase

key : 10th place of mode number decrease

key

key : Unit place of mode number

> N

increase

key : Unit place of mode number decrease

Change Adjustment Value

Write Adjustment Value

key : When adjusted value is changed : Adjusted value is written. When adjusted value is not changed : That item is adjusted automatically.

key : Up key : Down

> N

Change Major Item

Change Middle Item

key

Change Minor Item

4. During each test mode, the display is changed from one to another each time DISPLAY key is pressed (Remote control only).

4-5. OVERALL ADJUSTMENT MODE 4-5-1. Outline of the function

This mode is designed to adjust the servo system automatically by going through all the adjustment items. Usually, this mode is used to perform automatic adjustments when servicing the set.

4-6. NV RESET

Power: Connect the battery terminals to a stable DC 1.5V power supply, or insert fresh batteries (size “AA”, IEC “LR6”). Two different methods apply for NV reset, depending on whether the main unit or a remote control unit is used.

NV reset via main unit

1. Enter test mode.

2. Use the – key or the . key to set the device to Overall Adjustment mode.

ASS

3. Press the PLAY MODE/DISPLAY key. “CL” starts to flash.

AdJ

4. Press the PLA Y MODE/DISPLAY key once more. “CL” stops flashing and remains lit, thus concluding NV reset.

Address Value & Adjustment Value

LCD display

011 XXXSXX

Block Error Value & Adjustment Value

LCD display

011 XX BXX

ADIP Error Value & Adjustment Value

LCD display

011 XX AXX

* Functions are displayed,

Jitter Value & Adjustment Value

LCD display

but cannot be used via this unit.

011 XXXJXX

Power Adjustment Value

LCD display

731 XX VXX

After the voltage indicator appears, press the DISPLAY key twice.

AdJ

5. Press the x key to return to test mode.

NV reset via remote control

1. Set the TEST MODE.

2. Set the Manual mode and set the item No. 021, Reset NV. LCD display

021 AAAS CC

3. Press X key on the remote control. LCD display

021 AAAS CC

Flash CC

4. Press X key on the remote control again. LCD display

Memory Monitor Mode

XXX: Each Value

XX: Adjustment Value

for Item number

Note: In the Power mode, the item title display is only displayed.

5. To terminate the Manual mode and return to the TEST MODE, press x key.

021 AAAS CC

5. Press x key to terminate the Manual mode and return to the TEST MODE.

MZ-E300

4-6-1. Electrical offset adjustment method Note: Doing adjustment by the state that a disc does not enter.

1. Confirm the power voltage is 1.5V.

2. Set to the test mode.

3. Press the – key of main unit activates the overall adjustment mode.

Main unit LCD display

ASS

4. Press the + key.

Main unit LCD display

035:

5. Press the + key once more. Adjustment is complete when the adjustment value appears in the “XX” position.

4-6-2. Display segment check mode

1. Enter test mode. Display continuously alternates between the following three conditions: entire LCD is lit, entire LCD is extinguished, version info is shown, and so on.

2. Press and hold the x key on the main unit to enter display segment check mode.

* Should segments not be displayed correctly at this point, a short-

circuited COM terminal and/or SEG terminal on the microprocessor chip (IC801) are possible causes.

3. Display returns to condition “1” as soon as the x key is released.

4-7. OVERALL ADJUSTMENT MODE

4-7-1. Overall adjustment mode structure

TEST MODE (Display Check Mode)

key

CD overall Adjustment

MO overall Adjustment

Electrical offset Adjustment key

NV reset

> N

key

VOL – key or key

Overall Adjustment Title Display(ASSY**)

key

> N

VOL + key

PLAY MODE/DISPLAY key

Perform overall adjustments according to the following procedures (procedures may differ depending on the microprocessor chip version used). For Ver. 1.10, if it is no good in the overall adjustment, please repeat the overall adjustment several times.

Microprocessor Version 1.10

1 Clear NV.

2 Electric offset adjustment.

3 Rewriting of RAM 633h

1. switch to manual mode No. 100.

2. Press the DISPLAY key on the remote control unit 6 times consecutively to enter RAM mode.

3. Change the RAM address to 633h. Use the following keys on the remote control unit to change the digits of the RAM address: “The DISPLAY key for the first digit (hundreds), the x key for the second digit (tens) and the >B key or the . key for the third digits (units).”

4. Use the + and – keys on the remote control unit to set the adjustment value of No.633h to 03h and press once the pause key on the remote control unit to write this value to NV. “(If NV is cleared, the value is 00h.)

5. Press the DISPLAY key once more to change the display to “address and adjustment value display”.

6. Switch to the overall adjustment.

4 CD overall adjustment * (Not to turn off the power between the

items 3 and 4 .)

MZ-E300

XXX:

Ver 1.1 2001.03

5 Rewriting of the adjustment value.

1.After CD overall adjustment, switch to manual mode No. 321 in the condition the disc is in.

2.Press – key on the remote control unit to set 1 step down the

adjustment value of No. 321, and press the pause key on the remote control unit to write this value to NV.

3.Press the >B key on the remote control unit to switch to

manual mode No. 323.

4.Press the pause key on the remote control unit to set to the

automatic adjustment. During adjusting automatically, the adjustment value turns on and off, so wait for the time the adjustment value is on.

5.Press the >B key on the remote control unit to switch to

manual mode No. 345.

6.Note down the current adjustment value of No. 345 (value X).

Use the + and – keys on the remote control unit to set the adjustment value of No. 345 to the value (Y) determined by the formula below, and press the pause key on the remote control unit to write this value to NV. Formula: X x 1.18 = Y

* Since X and Y are 2’sC, attention must be paid to codes.

And the maximum value of Y must be 7Fh. (Never set it to the negative value.) Example: Since X = 2Bh, Y = 2Bh x 1.18 = 33h

6 Change the disc to MO overall adjustment disc (GA1 disc).

Switch to manual mode No.114. Press the pause key on the remotecontrol unit to set to the automatic adjustment. After adjustment, pull out the battery from the set to turn off the power. Then insert the battery again.

7 MO overall adjustment.

5 Change the disc to MO overall adjustment disc (GA1 disc).

6 MO overall adjustment.

4-7-2. Overall CD and MO adjustment method

1. Set the TEST MODE and press VOL – key or . key to set

the Overall Adjustment mode.

Main unit LCD display

ASS

2. Insert CD disc in the set, and press . key to set the Overall

CD Adjustment mode. Automatic adjustments are made.

Main unit LCD display

XXX:

XXX: Item No. for which an adjustment is being executed. YY: Adjustment Value

3. If NG in the overall CD adjustments, return to Reset NV and perform from the electrical offset adjustment again.

Microprocessor Version 1.20 and higher

1 Clear NV.

2 Electric offset adjustment.

3 CD overall adjustment.

4 Rewriting of the adjustment value.

1.After CD overall adjustment, switch to manual mode No. 321 in the condition the disc is in.

2.Press – key on the remote control unit to set 1 step down the adjustment value of No. 321, and press the pause key on the remote control unit to write this value to NV.

3.Press the >B key on the remote control unit to switch to manual mode No. 323.

4.Press the pause key on the remote control unit to set to the automatic adjustment. During adjusting automatically, the adjustment value turns on and off, so wait for the time the adjustment value is on.

5.Press the >B key on the remote control unit to switch to manual mode No. 345.

6.Note down the current adjustment value of No. 345 (value X). Use the + and – keys on the remote control unit to set the adjustment value of No. 345 to the value (Y) determined by the formula below, and press the pause key on the remote control unit to write this value to NV. Formula: X x 1.18 = Y

* Since X and Y are 2’sC, attention must be paid to codes.

And the maximum value of Y must be 7Fh. (Never set it to the negative value.) Example: Since X = 2Bh, Y = 2Bh x 1.18 = 33h

The NG item and “ng” alternately flash on the main unit LCD display.

XXX: NG item No. YY: Adjustment Value

4. If OK through the overall CD adjustments, then perform overall MO adjustments.

Main unit LCD display

End:cd

5. Insert MO disc in the set, and press > N key to set the Overall MO Adjustment mode. Automatic adjustments are made.

Main unit LCD display

XXX:

XXX: Item No. for which an adjustment is being executed. YY: Adjustment Value

6. If NG in the overall MO adjustments, return to Reset NV and perform the adjustment again.

The NG item and “ng” alternately flash on the main unit LCD display.

XXX:

XXX: NG item No. YY : Adjustment Value

7. If OK through the overall MO adjustments, press x key to return to the TEST MODE and terminate the Overall Adjustment mode.

Main unit LCD display

MZ-E300

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