Sony MZR-910 Service manual

MZ-R910

SERVICE MANUAL

Ver 1.0 2002. 06

US and foreign patents licensed from Dolby Laboratories.

SPECIFICATIONS

Audio playing system

MiniDisc digital audio system

Laser diode properties

Material:GaAlAs Wevelength : λ =790nm Emissin duration : continuous Laser output : less than 44.6 µW (This output is the value measured at a distance of 200 mm from the lens surface on the optial pick-up block with 7 mm aperture.)

Recording and playback time (when using MDW-80)

Maximum 160 min. in monaural Maximum 320 min. in stereo

Revolutions

382 rpm to 2,700 rpm (CLV)

Error correction

ACIRC (Advanced Cross Interleave Reed Solomon Code)

Sampling frequency

44.1 kHz

Sampling rate converter

Input : 32 kHz/44.1 kHz/48 kHz

Coding

ATRAC (Adaptive TRansform Acoustic Coding) ATRAC3 - LP2/LP4

Modulation system

EFM (Eight to Fourteer Modulation)

Frequency response

20 to 20,000 Hz ± 3 dB

Wow and Flutter

Below measurable limit

Hong Kong Model

Tourist Model

Model Name Using Similar Mechanism NEW Mechanism Type MT-MZR910-180 Optical Pick-up Name LCX-5RV

Inputs

MIC : sterto mini-jack (minimum input level 0.25 mV) Line in :

stereo mini-jack for anolog input (minimum input level 49 mV) optical (digital) mini-jack for optical (digital) input

Outputs

i/LINE OUT 194 mv(10 kohm)

Maximum output(DC)

Headphones : 5 mW + 5 mW(16 ohm)

Power requirements

Sony AC Power Adaptor connected at the DC IN 3V jack (country model in parentheses) :

230 - 240 V AC, 50 Hz (Hong Kong) 100 - 240 V AC, 50/60 Hz (Tourist)

The recorder :

Nickel metal hydride rechargeable battery NH-14WM(A) 1.2V 1350 mAh (MIN) Ni-MH LR6 (SG) alkaline battery

Battery charging stand:

AC power adaptor DC 3V

Dimensions

Approx.78.9 x 72.0 x17.1 mm (w/h/d)

/8 x 2 7/8 x 11/16 in.)

: stereo mini-jack (dedicated remote control jack) /

– Continued on next page –

9-874-055-01 Sony Corporation

2002F0200-1 Personal Audio Company C 2002.06 Published by Sony Engineering Corporation

PORTABLE MINIDISC RECORDER

MZ-R910

Mass

Approx. 108g (3.8 oz) the recorder only

The LINE IN (OPT) jack is used to connect either a digital (optical)

cable or a line (analog) cable.

The i/LINE OUT jack connects either headphones/earphones or a

line cable.

Design and specitications are subjext to change without notice.

Battery life

When recording

Batteries SP

Nickel metal

(Unit: approxi.hours)(JEITA1))

LP2 Stereo

LP4 Stereo

Stereo

12 17 21 hydride rechargeable

battery LR6 (S G)

Sony alkaline dry battery

Nickel metal

12 19 23

30 43 52 hydride rechargeable battery + On e LR6 (SG)

Measured in accordance with the JEITA (J a pan Ele ctronic s a nd Inform a tion Technology Industries Association) standard.

When us ing a 100% fully charged

metal hyd ride

14WM(A)).

Whe n us ing a So ny LR6 (S G) “STAMINA” a lkaline dry batte ry (produced in Ja pa n).

When playing

rechargeable battery (NH-

: approxi.hours)(JEITA

(Unit

Batteries S P

Stereo

Nickel metal

30 38 42

LP2 Stereo

nickel

LP4 Stereo

)

hydride rechargeable

battery LR6 (S G)

Sony alkaline dry battery

Nickel metal

44 52 62

79 95 110 hydride rechargeable

battery + On e LR6

(SG)

Measured in accordance woth the JEITA (Japan Electronics and Information Technology Industries Association) standard.

When us ing a 100% fully charged

metal hydride

14WM(A)).

When using a Sony LR6 (S G) “STAMINA” a lkaline dry battery (pro duced in Ja pan)

rechargeable battery (NH-

nickel

CAUTION

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

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.

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.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the leadfree 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.

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.

TABLE OF CONTENTS

MZ-R910

1. SERVICING NOTES

............................................... 4

2. GENERAL ................................................................... 5

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 6

3-2. Panel Assy, Bottom ......................................................... 6

3-3. Panel Assy, Upper Section .............................................. 7

3-4. “LCD Module”, “Panel Assy,Upper” ............................. 7

3-5. MAIN Board Assy .......................................................... 8

3-6. “Case Assy, Battery”, “MAIN Board” ........................... 8

3-7. Strip, Ornamental ............................................................ 9

3-8. “MD Mechanism Desk (MT-MZR910-180)”,

“Chassis Assy, Set” ......................................................... 9

3-9. Service Assy, OP (LCX-5RV)......................................... 10

3-10. Holder Assy ..................................................................... 10

3-11. Motor, DC (Sled) (M602) ............................................... 11

3-12. “Motor, DC (Spindle) (M601)”,

“Motor, DC (Over Write Head UP/DOWN) (M603)” ... 12

4. TEST MODE.............................................................. 13

5. ELECTRICAL ADJUSTMENTS......................... 19

6. DIAGRAMS

6-1. Note for Printed Wiring Board and

Schematic Diagrams ....................................................... 44

6-2. Block Diagram – SERVO Section – ............................... 46

6-3. Block Diagram – AUDIO Section – ............................... 47

6-4. Block Diagram – DISPLAY/KEY CONTROL/

POWER SUPPLY Section – ........................................... 48

6-5. Printed Wiring Board

– MAIN Board (Component Side) – ............................. 49

6-6. Printed Wiring Board

– MAIN Board (Conductor Side) – ............................... 50

6-7. Schematic Diagram – MAIN Board (1/4) – .................. 51

6-8. Schematic Diagram – MAIN Board (2/4) – .................. 52

6-9. Schematic Diagram – MAIN Board (3/4) – .................. 53

6-10. Schematic Diagram – MAIN Board (4/4) – .................. 54

6-11. IC Pin Function Description ........................................... 60

7. EXPLODED VIEWS

7-1. Panel Section ................................................................... 67

7-2. Chassis Section ............................................................... 68

7-3. MD Mechanism Deck Section (MT-MZR910-180)....... 69

8. ELECTRICAL PARTS LIST ............................... 70

MZ-R910

SECTION 1

SERVICING NOTES

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care.

NOTES ON LASER DIODE EMISSION CHECK

Never look into the laser diode emission from right above when checking it for adjustment. It is feared that you will lose your sight.

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK (LCX-5RV)

The laser diode in the optical pick-up block may suffer electrostatic break-down easily. When handling it, perform soldering bridge to the laser-tap on the flexible board. Also perform measures against electrostatic break-down sufficiently before the operation. The flexible board is easily damaged and should be handled with care.

• The shipment data will be cleared when the NV is reset. Therefore, change the NV adjusted values following the Change of NV Adjusted Values immediately after the NV was reset. (See page 19)

• This set requires the patch data in the nonvolatile memory (IC802) to be rewritten using the application, when the MAIN board or nonvolatile memory (IC802) was replaced. (See page

26)

• Replacement of CXD2677-204GA (IC801) uesd in this set requires a special tool.

laser-tap

OPTICAL PICK-UP FLEXIBLE BOARD

• In performing the repair with the power supplied to the set, removing the MAIN board causes the set to be disabled. In such a case, fix a convex part of the open/close detect switch (S804 on MAIN board) with a tape in advance. Handle the FLEXIBLE board (over write head) with care, as it has been soldered directly to the MAIN board. In repairing the component side of MAIN board, connect the FLEXIBLE board (over write head) and the MAIN board with the lead wires in advance. (See page 8)

FLEXIBLE board (Over write head)

upper panel assy

Tape

S804

MAIN boar

Looking at controls

SECTION 2

GENERAL

MZ-R910

This section is extracted from instruction manual.

The recorder

1 2 3

4 5 6

1 Display window 2 T MARK button 3 Battery compartment 4 END SERCH button 5

VOLUME + */ * The VOLUME + button has a tactile dot.

6 Terminals for attaching dry battery case 7 DC IN 3V jack 8 GROUP / CANCEL buttons 9 OPEN buttons

5-way control key

• For basic operations Press N* to play / enter. * the N buttons has a tactile dot. Press ./ > to rewind / fast forward. Press X to pause. Press CHG x to stop / charge.

buttons

qd qf

qg qh

• For moving the cursor and entering selected items (during text entry and other settings).

Jog dial (MENU / ENTER)

Press to enter the menu, turn to select, and then press to enter.

qs LINE IN (OPT) jack qd MIC (PLUG IN POWER)* jack

* There is a tactile dot beside the MIC (PLUG IN POWER) jack

qf REC (record) switch

Hold switch (at the rear)

qg qh i / LINE OUT jack

The display window of the recorder

1 Character information display

Displays the disc and track names, date, error messages, track numbers, etc.

2 Group intication 3 Disc intication

Shows that the disc is rotating for recording, playing or editing an MD.

4 REC intication

Lights up while recording.When flashing, the recorder is in record standby mode.

5 SYNC (synchro-recording) intication

6 Play mode intication

Shows the play mode (shuffle play, program play, repeat play, etc.) of the MD

7 Level meter 8 LP2 (LP2 stereo), LP4 (LP4 stereo),

MONO (LP4 stereo)

9 Sound intication

Lights up when Digital Sound Preset is on.

0 Battery intication

Shows approximatevbattery condition.

qa Melody timer intication

432 5

q;87

qa9

The headphones/earphones with a remote control

You can quickly fast forward or rewind without listening to the play back sound.

Control (VOLUME +/-)

Pull and turn to adjust the volume.

9 Display window 0 HOLD switch

x (stop) button

May be used as the Enter button, depending on the function.

—

1 DISPLAY button 2 PLAY MODE button 3 RPT/ENT (repeat/enter) button 4 SOUND button 5 Clip 6 X (pause) button 7 Control (./N>)

N> : play, AMS, FF . : REW

Turn or turn and hold to play, fast forward or rewind.

The display window of the remote control

1 Trak number display 2 Character information display 3 Disc indication 4 Melody timer indication

5 Play mode indication 6 Battery leavl indication 7 REC indication 8 SOUND indication

MZ-R910

Note: Disassemble the unit in the order as shown below.

3-1. DISASSEMBLY FLOW

Set

SECTION 3

DISASSEMBLY

3-2. Panel Assy,

Bottom

3-7. Strip,

Ornamental

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

3-3. Panel Assy,

Upper Section

3-8. “MD Mechanism Deck

(MT-MZR910-180)”, “Chassis Assy, Set”

3-2. PANEL ASSY, BOTTOM

3-5. Main Board Assy

3-4. “LCD Module”,

“Panel Assy, Upper”

S801

3-6. “Case Assy, Battery”,

3-9. Service Assy, OP

(LCX-5RV)

3-11. Motor, DC (Sled) (M602)

3-12. “Motor, DC (Spindle) (M601)”,

“Motor, DC (Over Write Head Up/Down) (M603)”

Note: On installation,

adjust the position of both switch (S801) and knobs(hold).

“Main Board”

3-10. Holder Assy

Two ES lock screws

Knob (hold)

Close the battery terminal (plus).

Remove the “panel assy, bottom” in the direction of the arrow

Open the lid, battery case.

Three ES lock screws

Lid, battery case

Claw

3-3. PANEL ASSY, UPPER SECTION

)

Two ES lock screws

Panel assy, upper

Flexible board (CN801

Two ES lock screws

MZ-R910

3-4. “LCD MODULE”, “PANEL ASSY, UPPER”

Remove the LCD module in the direction of the arrow.

Push the button (open).

Three screws (1.7)

Panel assy, upper

MZ-R910

3-5. MAIN BOARD ASSY

Flexible board (CN501)

Main board assy

Remove two solders of flexible board.

Four screws (M1.4 toothed lock)

ES lock screw

3-6. “CASE ASSY, BATTERY”, “MAIN BOARD”

Flexible board (CN502)

Case assy, battery

Main boar

Remove the solder of terminal (plus).

Remove the solder

of terminal (minus).

3-7. STRIP, ORNAMENTAL

Pull toward the direction to disengage two bosses .

MZ-R910

Remove the “strip, ornamental” in the direction of arrow

Note: As the “strip, ornamental”

is very fragile, do not give an excessive force to the entire assy when removing it.

Three bosses

Two convex portions pointed with

Boss

)

Open toward the direction

Boss

to disengage two bosses and convex portions pointed with

Boss

3-8. “MD MECHANISM DECK (MT-MZR910-180)”, “CHASSIS ASSY, SET”

Boss

MD mechanism deck (MT-MZR910-180)

Boss

Spring (arm), tension

Screw (1.4)

Chassis assy, se

Screw (1.4)

MZ-R910

3-9. SERVICE ASSY, OP (LCX-5RV)

Washer (0.8-2.5)

Screw (M1.4)

Spring, rack

Gear (SA)

Screw (M1.4)

Spring, thrust detent

Pull off “screw, lead”

Service assy, OP (LCX-5RV)

Over write head section

Opening the over write head toward the direction (LCX-5RV) toward the direction

, remove the “service assy, OP

Note: Do not open the entire assy forcibly,

when opening the over write head.

3-10. HOLDER ASSY

Open the holder assy.

Remove the holder assy in the direction of arrow

Push the convex portion toward the direction open the holder assy toward the direction

Remove the concave portion in the direction of arrow

to erect uprightly.

and

MZ-R910

3-11. MOTOR, DC (SLED) (M602)

Two screws (M1.4)

Motor, DC (sled) (M602)

Gear (SA)

Boss

Washer (0.8-2.5)

Remove six solders of motor flexible board.

MZ-R910

3-12. “MOTOR, DC (SPINDLE) (M601)”, “MOTOR, DC (OVER WRITE HEAD UP/DO WN) (M603)”

Remove six solders of motor flexible board.

Note: Press-fit the gear (HA) up to the

position of the “motor, DC (over write head up/down) (M603) as shown below.

Gear (HA)

2.65 mm Chassis assy, gear

Motor, DC (over write head up/down) (M603)

Gear (HA)

Gear (HB)

Washer (0.8-2.5)

Three screws (M1.4)

Motor, DC (spindle) (M601)

Motor, DC (over write head up/down) (M603)

Two screws (M1.4)

Chassis assy, gear

Screw (M1.2)

Gear (HC)

SECTION 4

TEST MODE

MZ-R910

Outline

• This set provides the Overall adjustment mode that allows CD and MO discs to be automatically adjusted when in the test mode. In this overall adjustment mode, the disc is discriminate between CD and MO, and each adjustment is automatically executed in order. If a fault is found, the system displays its location. Also, the manual mode allows each individual adjustment to be automatically adjusted.

• Operation in the test mode is performed with the set. A key having no particular description in the text, indicates a set key.

• For the LCD display, the LCD on the remote commander is shown, but the contents of LCD display on the set are same.

Setting Method of Test Mode

There are three different methods to set the test mode: 1 Short SL801 (TEST) on the MAIN board with a solder bridge

(connect pin <zvn of IC801 to the ground) and turn on the switch. Then, turn on the power.

– MAIN Board (Conductor Side) –

[HOLD]

Operation in Setting the Test Mode

• When the test mode becomes active, first the display check mode is selected.

• Other mode can be selected from the display check mode.

• When the test mode is set, the LCD repeats the following display.

Remote commander LCD display

All lit

888

All off

Microcomputer version display

001 V1.000

• When the X key is pressed and hold down, the display at that time is held so that display can be checked.

Releasing the Test Mode

For test mode set with the method 1: Turn off the power and open the solder bridge on SL801 (TEST) on the MAIN board.

Note: Remove the solders completely. Remaining could be shorted with

the chassis, etc.

For test mode set with the method 2 or 3: Turn off the power.

SL801

TEST

SL801(TEST)

CN502

144

IC501

C508

C509

C510

C511

C513 C519

C821

C820

C818

C813

C811

C810

C850

R855

C808

2 In the normal mode, turn on the [HOLD] switch. While press-

ing the

[VOLUME --] key press the following order:

> t > t . t . t > t . t > t . t X t X

3 In the normal mode, turn on the [HOLD] switch. While

pressing the

x/CHG key, press the keys on the remote

commander with the following order:

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

Note: If electrical adjustment (CD and MO overall adjustment) has not

been finished completely, “NV Error” is displayed on LCDs of the set and the remote commander.

MZ-R910

x/CHG

key

x/CHG

key

[VOLUME +]

key: 100th place of item

number increase.

[VOLUME --]

key: 100th place of item

number decrease.

[Major item switching]

[VOLUME +]

key: 10th place of item

number increase.

[VOLUME --]

key: 10th place of item

number decrease.

[VOLUME +]

key: Increases the adjusted

value of the 1st digit

[VOLUME --]

key: Decreases the adjusted

value of the 1st digit

[Medium item switching]

key

[Minor item switching]

[Adjusted value variation]

key: When adjusted value is

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

[Adjusted value write]

key: Unit place of item number

increase.

key:Unit place of item number

decrease.

[PLAY MODE]

key of the remote commander: Increase the adjusted value of the 2nd digit

[SOUND]

key of the remote commander:

Decrease the adjusted value of the 2nd digit

Configuration of Test Mode

[Test Mode $Display Check Mode%]

Press the

Turn the jog dial (down), or press the

Press the

or [VOLUME +] key

[Manual Mode]

x/CHG

key

or [VOLUME --] key

[Overall Adjustment Mode]

x/CHG

key

[DISPLAY]

key on the remote commander

[Self-Diagnosis Result Display Mode]

x/CHG

key

[Servo Adjustment]

[Audio Adjustment] [Power Supply Adjustment]

[OP Alignment Adjustment]

[Electrical Offset Adjustment]

Power Supply Adjustment Auto Item Feed

CD Overall Adjustment/ MO Overall Adjustment

Press the

or [REC] key

[Sound Skip Check Result Display Mode]

Press the

x/CHG

Press the on the remote commander for several seconds (about 3 seconds)

[T MARK]

key

key, or

[DISPLAY]

[Key Check Mode]

The key check quits, or open the upper panel

Manual Mode

Mode to adjust or check the operation of the set by function. Normally, the adjustment in this mode is not executed. However, the Manual mode is used to clear the memory, power supply adjustment, and laser power check before performing automatic adjustments in the Overall Adjustment mode.

• Transition method in manual mode

1. Set the test mode (see page 13).

2. Press the where the LCD display as shown below.

Remote commander LCD display

000

3. During each test, the optical pick-up moves outward or inward while the onds respectively.

4. Each test item is assigned with a 3-digit item number; 100th place is a major item, 10th place is a medium item, and unit place is a minor item. The values adjusted in the test mode are written to the nonvolatile memory (for the items where adjustment was made).

> or[VOLUME +] key activates the manual mode

Manual

> or . key is pressed for several sec-

key

MZ-R910

5. The display changes a shown below each time the jog dial (down) is turned or the commander is pressed.

• Address & Adjusted Value Display

Remote commander LCD display

011

C68S01

item number

• Jitter Value & Adjusted Value Display

Remote commander LCD display

011

item number

• Block Error Value & Adjusted Value Display

Remote commander LCD display

011

item number

• ADIP Error Value & Adjusted Value Display

Remote commander LCD display

011

item number

• Focus Drive Value & Adjusted Value Display

Remote commander LCD display

011

item number

• Item Title Display

Remote commander LCD display

address

OFFJ01

jitter value

063B01

block error

value

059A01

ADIP error

value

015F01

Focus drive

value

[DISPLAY] key on the remote

adjusted value

Self-Diagnosis Result Display Mode

This set uses the self-diagnostic function system in which if an error occurred during the recording or playing, the mechanism control block and the power supply control block in the microcomputer detect it and record its cause as history in the nonvolatile memory. By checking this history in the test mode, you can analyze a fault and determine its location. Total recording time is recorded as a guideline of how long the optical pickup has been used, and by comparing it with the total recording time at the time when an error occurred in the selfdiagnosis result display mode, you can determine when the error occurred. Clear both self-diagnosis history data and total recording time, if the optical pickup was replaced.

• Self-diagnosis result display mode setting method

1. Set the test mode (see page 13).

2. In the display check mode, turn the jog dial (down) or press the

[DISPLAY] key on the remote commander activates the self-

diagnosis result display mode where the LCD display as shown below.

Remote commander LCD display

0XX

1 0000

history code

error display code

3. Then, each time the by one as shown below. Also, the LCD display ascends by one when the

. key is pressed.

Total recording time when error occurred

> key is pressed, LCD display descends

0XX 1 ****

0XX N ****

011

LrefPw 01

item number

However in the power mode (item number 700’s), only the item is displayed.

6. Quit the manual mode, and press the the test mode (display check mode).

item title

adjusted value

x/CHG key to return to

Overall Adjustment Mode

Mode to adjust the servo automatically in all items. Normally, automatic adjustment is executed in this mode at the repair. For further information, refer to “SECTION 5 ELECTRICAL ADJUSTMENTS” (see page 19).

0XX N1**** 0XX N2**** 0XX R_****

: Error code

****

: Total recording time

If the jog dial (down) is turned or the commander is pressed with this display, the LCD switches to the simple display mode.

4. Quit the self-diagnosis result display mode, and press the

CHG key to return to the test mode (display check mode).

[DISPLAY] key on remote

MZ-R910

• Description of error indication codes

Problem Indication code Meaning of code Simple display Description

No error 00 No error --- No error

Servo system error 02 High temperature Temp High temperature detected

03 Focus error Fcus Disordered focus or can not read an address 04 Spindle error Spdl Abnormal rotation of disc

TOC error

Power supply system error 22 Low battery LBat Momentary interruption detected

Offset system error

Disc error 35

11 TOC error TOC Faulty TOC contents 12 Data reading error Data Data could not be read at SYNC

31 Offset error Ofst Offset error

Illegal access target address was specified

Focus error ABCD offset error

Tracking error Offset error

X1 tracking error Offset error

MD DATA 2 disc error

Adrs Attempt to access an abnormal address

ABCD Focus error ABCD offset error

TE Tracking error Offset error

X1TE X1 tracking error Offset error

MD2 MD DATA 2 disc error

• Description of indication history

History code number Description

1 The first error N The last error N1 One error before the last. N2 Two errors before the last. R_ Total recording time

Reset the Error Display Code

After servicing, reset the error display code.

• Setting method of reset the error display code

1. Set the test mode (see page 13).

2. Turn the jog dial (down) or press the remote commander activates the self-diagnosis result display mode.

3. To reset the error display code, press the the code is displayed (except “R_****”). (All the data on the 1, N, N1, and N2 will be reset)

[DISPLAY] key on the

X key (twice) when

MZ-R910

Sound Skip Check Result Display Mode

This set can display the count of errors that occurred during the recording/playing for checking.

• Setting method of sound skip check result display mode

1. Set the test mode (see page 13).

2. Press the

sound skip result display mode becomes active respectively where the LCD displays the following.

Remote commander LCD display

3. When the

the LCD, and each time the item moves down by one as shown below. Also, if the is pressed, the display item moves up by one, then if the key is pressed, the display in the record mode appears. When the on the LCD, and each time the item moves down by one as shown below. Also, if the is pressed, the display item moves up by one, then if the

Playing sound skip result display

000 P**R**

N key or [REC] key, and the playing or recording

000

P**R**

Total count of record

Total count of play system errors (hex.)

N key is pressed, total error count is displayed on

[REC] key is pressed, total error count is displayed

N key is pressed, the display in the play mode appears.

system errors (hex.)

> key is pressed, the display

. key

[REC]

> key is pressed, the display

. key

Recording sound skip result display

000 P**R**

Jog and Key Check Mode

This set can check if the set and remote commander function normally.

• Setting method of jog check mode

1. Set the test mode (see page 13).

2. Press the jog button to activate the jog check mode and display as below.

Remote commander LCD display

000

PUSH

3. Turn the jog dial downwards one click.

Remote commander LCD display

000

JOG+ 1

4. Turn the jog dial downwards three more clicks.

Remote commander LCD display

000

JOG+OK

5. Turn the jog dial upwards one click.

Remote commander LCD display

000

JOG- 1

6. Turn the jog dial upwards three more clicks.

Remote commander LCD display

000 EIB **

000 Stat** 000 Adrs** 000 BEmp**

000 BOvr**

000 Bful** 000 Rtry** 000 ######

000 ######

P**R**

: Total play/record errors (hex.)

: Counter of sound skip check each item (hex.)

######

: 6-digit address where sound was skipped last (hex.)

• Cause of sound skip error

Cause of error Description of error

EIB Sound error correction error

Play

Record

4. To quit the sound skip check result display mode and to return

Stat Decoder status error Adrs Address access error BEmp Buffer is empty

BOvr

Bful Rtry Retry times over

to the test mode (display check mode), press the

Buffer is full, and sounds were dumped

Buffer capacity becomes less, and forcible writing occurred

x/CHG key.

000

JOG OK

7. When the check mode.

Note: T o enter the key check mode, it is not necessary to enter via the jog

dial check mode. (Refer to next item)

• Setting method of key check mode

1. Set the test mode (see page 13).

2. Press the mander for several seconds (about 3 seconds) activates the key check mode. (At the last two digits, AD value of remote commander key line is displayed in hexadecimal)

Remote commander LCD display

000

3. When each key on the set and on remote commander is pressed, its name is displayed on the remote commander LCD. (The operated position is displayed for 4 seconds after the slide switch is operated. If any other key is pressed during this display, the remote commander LCD switches to its name display)

x/CHG key is pressed, it changes over to the key

[T MARK] key or [DISPLAY] key on the remote com-

: AD value of the remote commander key

(hexadecimal 00 to FF)

MZ-R910

Example1: When the > key on the set is pressed:

Remote commander LCD display

000

FF **

: AD value of the remote commander key

(hexadecimal 00 to FF)

Example2: When the

is pressed:

Remote commander LCD display

000

rPLAY **

: AD value of the remote commander key

(hexadecimal 00 to FF)

4. When all the keys on the set and on the remote commander are considered as OK, the following displays are shown for 4 seconds.

Example1: When the keys on the set are considered as OK:

Remote commander LCD display

N > key on the remote commander

888

SET OK **

: AD value of the remote commander key

(hexadecimal 00 to FF)

Example2: When the keys on the remote commander are con-

sidered as OK:

Remote commander LCD display

888

RMC OK **

: AD value of the remote commander key

(hexadecimal 00 to FF)

5. When all keys were checked or if the upper panel is opened,

the key check mode quits and the test mode (display check mode) comes back.

SECTION 5

ELECTRICAL ADJUSTMENTS

MZ-R910

Outline

• In this set, automatic adjustment of CD and MO can be performed by entering the test mode. However, before starting automatic adjustment, the memory clear, power supply adjustment, and laser power check must be performed in the manual mode.

• A key having no particular description in the text, indicates a set key.

• For the LCD display, the LCD on the remote commander is shown, but the contents of LCD display on the set are same.

Precautions for Adjustment

1. Adjustment must be done in the test mode only.

After adjusting, release the test mode.

2. Use the following tools and measuring instruments.

• Test CD disc TDYS-1 (Part No. : 4-963-646-01)

• SONY MO disc available on the market

• Digital voltmeter

• Laser power meter LPM-8001 (Part No. : J-2501-046-A)

• Thermometer (using the Temperature Correction)

3. Unless specified otherwise, supply DC 3V from the DC IN 3V jack (J601).

4. Switch position

HOLD switch ............................................... ON

Adjustment Sequence

1. NV Reset (EEPROM clear)

2. Power Supply Manual Adjustment

3. Temperature Correction (item number: 015)

4. Laser Power Check

5. Electrical Offset Adjustment

Caution: This adjustment must be made with

no disc loaded.

r Overall Mode

6. CD Overall Adjustment

7. MO Overall Adjustment

8. RESUME Clear

 

Manual Mode

 



Manual Mode

 

 

Manual Mode

 

        



Manual Mode

 

NV Reset

Caution: The shipment data will be cleared when the NV is reset.

Therefore, change the NV adjusted values following the Change of NV Adjusted Values immediately after the NV was reset. Change the NV adjustment values according to the microcomputer version.

• Setting method of NV reset

1. Select the manual mode of the test mode, and set item number 021 NV Reset (see page 14).

Remote commander LCD display

021

2. Press the X key.

Remote commander LCD display

021

3. Press the X key once more.

Remote commander LCD display

021

ResNV CC

ResOK?

Res***

NV reset (after several seconds)

021

Reset!

4. Press the the test mode (display check mode).

• Change of NV adjusted values (version 1.300)

Caution: Change the NV adjustment values according to the mi-

In this set, some adjusted values were set in the manual mode at the shipment, but these will be cleared when the NV is reset. Therefore, modify the NV adjusted values through the following procedure immediately after the NV was reset.

1. Item numbers in which the NV adjusted values are to be modified – Change ABCD gain [Hpit] initial value (item number 336)

– Change CLV drive voltage limiter (item numbers 865, 866) – Change x2 CLV speed gain, +6dB compared to conventional

– Change x2 CLV phase gain, +3dB compared to conventional

– Change x2/x1 switching temperature threshold value

x /CHG

crocomputer version.

Caution: The ABCD gain [Hpit] initial value must be

(item numbers 867, 868)

(item numbers 871, 872)

(+10°C t +5°C) (item numbers 873, 874)

key to quit the manual mode, and return

changed before the overall adjustment.

2. NV adjusted values modifying procedure

1) Select manual mode of the test mode, and set item number 336 (see page 14).

Remote commander LCD display

336

AbcdGn **

: Adjusted value

MZ-R910

2) Adjust with the [VOLUME +] key (adjusted value up) or [VOL- key (adjusted value down) so that the adjusted value

UME --]

becomes 08.

3) Press the

4) Select manual mode of the test mode, and set item number

865 (see page 14).

Remote commander LCD display

865

: Adjusted value

5) Adjust with the [VOLUME +] key (adjusted value up) or [VOL-

UME --]

becomes 2C.

6) Press the

7) Select manual mode of the test mode, and set item number

866 (see page 14).

Remote commander LCD display

866

: Adjusted value

8) Adjust with the [VOLUME +] key (adjusted value up) or [VOL-

UME --]

becomes B9.

9) Press the

10) Select manual mode of the test mode, and set item number

867 (see page 14).

Remote commander LCD display

867

: Adjusted value

11) Adjust with the [VOLUME +] key (adjusted value up) or [VOL-

UME --]

becomes C9.

12) Press the

13) Select manual mode of the test mode, and set item number

868 (see page 14).

Remote commander LCD display

868

: Adjusted value

14) Adjust with the [VOLUME +] key (adjusted value up) or [VOL-

UME --]

becomes 80.

15) Press the

16) Select manual mode of the test mode, and set item number

871 (see page 14).

Remote commander LCD display

871

: Adjusted value

17) Adjust with the [VOLUME +] key (adjusted value up) or [VOL-

UME --]

becomes CA.

18) Press the

19) Select manual mode of the test mode, and set item number

872 (see page 14).

Remote commander LCD display

key to write the adjusted value.

V3 num **

key (adjusted value down) so that the adjusted value

key to write the adjusted value.

V3 dat **

key (adjusted value down) so that the adjusted value

key to write the adjusted value.

V4 num **

key (adjusted value down) so that the adjusted value

key to write the adjusted value.

V4 dat **

key (adjusted value down) so that the adjusted value

key to write the adjusted value.

V5 num **

key (adjusted value down) so that the adjusted value

key to write the adjusted value.

20) Adjust with the [VOLUME +] key (adjusted value up) or [VOL- key (adjusted value down) so that the adjusted value

UME --]

becomes 2D.

21) Press the

22) Select manual mode of the test mode, and set item number

873 (see page 14).

Remote commander LCD display

873

: Adjusted value

23) Adjust with the [VOLUME +] key (adjusted value up) or [VOL-

UME --]

becomes BB.

24) Press the

25) Select manual mode of the test mode, and set item number

874 (see page 14).

Remote commander LCD display

874

: Adjusted value

26) Adjust with the [VOLUME +] key (adjusted value up) or [VOL-

UME --]

becomes 05.

27) Press the

key to write the adjusted value.

V6 num **

key (adjusted value down) so that the adjusted value

key to write the adjusted value.

V6 dat **

key (adjusted value down) so that the adjusted value

key to write the adjusted value.

Power Supply Manual Adjustment

• Adjustment sequence

Adjustment must be done with the following steps.

1. Vc PWM Duty (L) adjustment (item number: 762)

2. Vc PWM Duty (H) adjustment (item number: 763)

3. Vl PWM Duty (L) adjustment (item number: 764)

4. Vl PWM Duty (H) adjustment (item number: 765)

5. Vrec PWM Duty (L) adjustment (item number: 766)

6. Vrec PWM Duty (H) adjustment (item number: 767)

7. Vd PWM Duty adjustment (item number: 768)

• Setting method of power supply manual adjustment

1. Make sure that the power supply voltage is 3V.

2. Select the manual mode of the test mode (see page 14).

3. Set item number.

• Adjustment method of Vc PWM Duty (L)

(item number: 762)

Remote commander LCD display

762

VclPWM **

: Adjusted value

872

V5 dat **

: Adjusted value

MZ-R910

1. Connect a digital voltmeter to the AP914 (VC) on the MAIN board, and adjust key (voltage down) so that the voltage becomes 2.40 V.

MAIN board

AP914 (VC)

AP912 (GND)

2. Press the X key to write the adjusted value.

Adjustment and Connection Location:MAIN board

• Adjustment method of Vc PWM Duty (H)

(item number: 763)

Remote commander LCD display

763

: Adjusted value

1. Connect a digital voltmeter to the AP914 (VC) on the MAIN board, and adjust

key (voltage down) so that the voltage becomes 2.75 ± 0.015

--]

MAIN board

AP914 (VC)

AP912 (GND)

2. Press the X key to write the adjusted value.

Adjustment and Connection Location:MAIN board

• Adjustment method of Vl PWM Duty (L)

(item number: 764)

Remote commander LCD display

764

: Adjusted value

1. Connect a digital voltmeter to the AP915 (VL) on the MAIN board, and adjust

key (voltage down) so that the voltage becomes 2.30 V.

--]

[VOLUME +] key (voltage up) or [VOLUME --]

digital

voltmete

(see page 23)

VchPWM **

[VOLUME +] key (voltage up) or [VOLUME

digital

voltmete

(see page 23)

VLpwmL **

[VOLUME +] key (voltage up) or [VOLUME

digital

voltmete

MAIN board

AP915 (VL)

AP912 (GND)

+ 0.005 – 0.01

1. Connect a digital voltmeter to the AP915 (VL) on the MAIN board, and adjust

key (voltage down) so that the voltage becomes 2.55 V.

--]

MAIN board

AP915 (VL)

AP912 (GND)

2. Press the X key to write the adjusted value.

Adjustment and Connection Location:MAIN board

• Adjustment method of Vrec PWM Duty (L)

(item number: 766)

Remote commander LCD display

766

: Adjusted value

1. Connect a digital voltmeter to the AP611 (VREC) on the MAIN board, and adjust

key (voltage down) so that the voltage becomes 1.08 V.

--]

MAIN board

AP611 (VREC)

AP912 (GND)

2. Press the X key to write the adjusted value.

Adjustment and Connection Location:MAIN board

• Adjustment method of Vrec PWM Duty (H)

(item number: 767)

Remote commander LCD display

767

: Adjusted value

1. Connect a digital voltmeter to the AP611 (VREC) on the MAIN board, and adjust

key (voltage down) so that the voltage becomes 1.65 to 1.70

--]

MAIN board

AP611 (VREC)

AP912 (GND)

[VOLUME +] key (voltage up) or [VOLUME

digital

voltmete

(see page 23)

RECpwL **

[VOLUME +] key (voltage up) or [VOLUME

digital

voltmete

(see page 23)

RECpwH **

[VOLUME +] key (voltage up) or [VOLUME

digital

voltmete

+ 0.005 – 0.01

2. Press the

Adjustment and Connection Location:MAIN board

• Adjustment method of Vl PWM Duty (H) (item number: 765)

Remote commander LCD display

765

: Adjusted value

key to write the adjusted value.

VLpwmH **

(see page 23)

2. Press the X key to write the adjusted value.

Adjustment and Connection Location:MAIN board

(see page 23)

• Adjustment method of Vd PWM Duty (item number: 768)

Remote commander LCD display

768

VD_PWM **

: Adjusted value

MZ-R910

1. Connect a digital voltmeter to the AP911 (VD) on the MAIN board, and adjust

key (voltage down) so that the voltage becomes 1.31 ± 0.010

--]

MAIN board

AP911 (VD)

AP912 (GND)

2. Press the X key to write the adjusted value.

Adjustment and Connection Location:MAIN board

[VOLUME +] key (voltage up) or [VOLUME

digital

voltmete

(see page 23)

Temperature Correction

• Adjustment method of temperature correction

1. Select the manual mode of test mode, and set the item number 015 (see page 14).

Remote commander LCD display

015

2. Measure the ambient temperature.

3. Adjust with justed value (hexadecimal value) becomes the ambient temperature. (Initial value: 19h = 25 °C, Adjusting range: 80h to 7fh (–128 °C to +127 °C)

4. Press the

SetTmp **

: Adjusted value

[VOLUME +], [VOLUME --] key so that the ad-

key to write the adjusted value.

4. Press the (item number 011).

Remote commander LCD display

011

5. Check that the laser power meter reading is 0.81 ± 0.08 mW.

6. Check that the voltage both ends (TP (+) and TP (–)) of resistor R521 at this time is below 44 mV.

7. Press the (item number 012).

Remote commander LCD display

012

8. Check that the laser power meter reading is 0.97 ± 0.10 mW.

9. Check that the voltage both ends (TP (+) and TP (–)) of resistor R521 at this time is below 44 mV.

10. Press the (item number 013).

Remote commander LCD display

013

11. Check that the laser power meter reading is 4.95 ± 0.50 mW.

12. Check that the voltage both ends (TP (+) and TP (–)) of resistor R521 at this time is below 80 mV.

13. Press the the test mode (display check mode).

Adjustment and Connection Location:MAIN board

key, and set the laser MO read adjustment mode

LrefPw **

key, and set the laser CD read adjustment mode

HrefPw **

key, and set the laser MO write adjustment mode

WritPw **

x /CHG

key to quit the manual mode, and activate

(see page 23)

Laser Power Check

Connection :

laser

power meter

Optical pick-up objective lens

digital voltmete

MAIN board

TP (+) TP (–)

Checking Method :

1. Select the manual mode of test mode (see page 14), and set the laser power adjusting mode (item number 010).

Remote commander LCD display

010

2. Press the

moves to the most inward track.

3. Open the cover and set the laser power meter on the objective lens of the optical pick-up.

Laser

key continuously until the optical pick-up

C212

C609

Adjustment/checking and Connection Location:

– MAIN Board (Conductor Side) –

AP914 (VC)

5816

IC303

129

C217

C216

C218

R218 R206

R319

L302

L804

L303

F801

FB301

FB303

FB304

FB306

L301

C101

IC302

R813

C335

D301

C836

1 5 10 15 19

CN801

C320

C102

R201

R102

R101

C108 C208

C105

C107

R105

R103 R203

R104

R846

C103

C203

C207

C306

C303

C302

C202

C304

R205

R204

C839

IC301

C305

C301

AP914

(VC)

C201

R202

C307

C205

D303

R301

R312

R303

C316

C315

R909 R910

C922

R941

C902

D603

R309

R902

R903

R905

R607

C601

R605

R604

C908

C921

C905

R616

AP912 (GND)

D602

R934

C906

TH601

R937R935

D901

R304

C901

C521

D903

D902

IC903

IC901

TP (+) TP (–) AP911 (VD)

ECB

Q911

TP(+)

C926

BCE

Q908

R956

R958

C935

R959

RB801

C932

R517

R955

R519

C915

C919

Q909

R503

C502

C527

R521

R522

ECB

C505

R505

Q501

R911

ECB

IC501

C504

C530

22 23

TP(–)

C529

C518

AP911

(VD)

D904

Q903

R915

C934

L907

C523

C507

C526

R961

R960

R950

R920

C913

R951

IC551

C914

C936

Q910

R953

R952

Q801

C826

4229

C920

R954

ECB

C506

AP915

C929

C928

L501

(VL)

R916

R922

C510

C511

C513 C519

C532 C514

R866

C515

C516

C851

L502

C524

Q907

D905

IC902

C931

G2 S2

Q605

S2 D2

C615

AP915 (VL)

R865

L802

Q904

R925

BCE

R929

R928

Q901

G1 S1 S1 D1

D606

D608

C603

MZ-R910

R816

C828

C829

R845

Q905

R927

IC803

BCE

C840

R930

Q906

AP611

(REC)

Q604

C608

G2S2S2

C626

C825

C604

SWITCH

LCD MODULE

J601

DC IN 3V

–

DRY BATTERY

SIZE “AA”

(IEC DESIGNATION R6)

1PC. 1.5V

HR601

OVER WRITE

HEAD

(BATTERY CASE)

AP912 (GND) AP611 (VREC)

+ 53 hidden pages