Sony MZR-500-PC Service manual

MZ-R500/R500PC

SERVICE MANUAL

Ver 1.0 2001. 01

Ver 1.0 2001. 06

This service manual contains the information on the MZ-R500 (9-873-054-11).

Photo: MZ-R500

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 lens surface on the optical 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

350 rpm to 2,800 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 ATRAC3-LP4

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 limit

Inputs

Line in: stereo mini-jack, minimum input level 49 mV Optical (Digital) in: optical (digital) minijack

Outputs

i: stereo mini-jack, maximum output level 5 mW + 5 mW, load impedance 16 ohm

US Model

Canadian Model

MZ-R500/R500PC

AEP Model

UK Model

E Model

Chinese Model

MZ-R500

Model Name Using Similar Mechanism NEW Mechanism Type MT-MZR500-172 Optical Pick-up Name LCX-4R

General

Power requirements

Sony AC Power adaptor connected at the DC IN 3 V jack (AEP, Chinese and Argentine models only):

230 V AC, 50/60 Hz (AEP model) 220 V AC, 50 Hz (Chinese model)

220 V AC, 50 Hz (Argentine model) One LR6 (size AA) alkaline dry battery (not supplied)

– Continued on next page –

9-873-177-01

PORTABLE MINIDISC RECORDER

Sony Corporation

Personal Audio Company Shinagawa Tec Service Manual Production Group

MZ-R500/R500PC

Battery operation time Battery life

LR6 (SG) alkaline dry battery3)Normal LP2 LP4

Recording Playback 36 42 48

Dimensions

Approx. 83.0 × 27.8 × 75.8 mm (w/h/d) (3 3/8 × 1 1/8 × 3 in.) without projections.

Mass

Approx. 113 g (4.0 oz) the recorder only

Supplied accessories

AC power adaptor (AEP, Chinese and Argentine models only) (1) Headphones/earphones (1) Optical cable (AEP, Chinese and Argentine models only) (1)

Design and specifications are subject to change without notice.

The battery life may be shorter due to operating conditions, the temperature of the location, and varieties of batteries. Measured in accordance with the EIAJ (Electronic Industries Association of Japan) standard. When using a Sony LR6 (SG) “STAMINA” alkaline dry battery (produced in Japan). To prevent interrupted recording due to drained battery, use new battery for recording operations.

(Unit: approx.hours) (EIAJ2))

7.5 10 13.5

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.

CAUTION

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

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 P ARTS 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!!

MZ-R500/R500PC

1. SERVICING NOTE......................................................... 4

2. GENERAL

Looking at the Controls ...................................................... 5

Record an MD..................................................................... 5

Playing an MD right away ..................................................6

3. DISASSEMBLY

3-1. Case (Lower) Assy .............................................................. 7

3-2. Case (Upper) Assy .............................................................. 7

3-3. LCD Module ....................................................................... 8

3-4. Main Board .........................................................................8

3-5. MD Mechanism Deck ......................................................... 9

3-6. Service Assy, OP.................................................................9

3-7. Holder Assy.......................................................................10

3-8. Motor Flexible Board ........................................................ 10

3-9. Motor, DC (M602) ............................................................ 11

3-10. “Motor, DC (M601)”, “Motor, DC (M603)” .................... 11

4. TEST MODE

4-1. Outline............................................................................... 12

4-2. Setting Method of Test Mode............................................ 12

4-3. Operation in Setting the Test Mode...................................12

4-4. Releasing the Test Mode ...................................................12

4-5. Configuration of Test Mode ..............................................13

4-6. Manual Mode ....................................................................13

4-7. Overall Adjustment Mode ................................................. 14

4-8. Self-Diagnosis Result Display Mode ................................ 14

4-9. Reset the Error Display Code............................................15

4-10. Sound Skip Check Result Display Mode .......................... 16

4-11. Key Check Mode...............................................................16

5. ELECTRICAL ADJUSTMENTS

5-1. Outline............................................................................... 18

5-2. Precautions for Adjustment............................................... 18

5-3. Adjustment Sequence........................................................ 18

5-4. NV Reset ........................................................................... 18

5-5. Power Supply Manual Adjustment.................................... 19

5-6. Temperature Correction..................................................... 20

5-7. Laser Power Check ........................................................... 20

5-8. Overall Adjustment Mode ................................................. 21

5-9. Resume Clear ....................................................................23

5-10. Patch Data Rewriting when Nonvolatile

Memory was Replaced...................................................... 23

6. DIAGRAMS

6-1. IC Pin Function Description ............................................ 30

6-2. Block Diagram – Servo Section – ..................................... 36

6-3. Block Diagram – Audio Section – ....................................37

6-4. Block Diagram – System Control/Power Section – .......... 38

6-5. Printed Wiring Board – Main Section –............................ 40

6-6. Schematic Diagram – Main Section (1/3) – ...................... 42

6-7. Schematic Diagram – Main Section (2/3) – ...................... 43

6-8. Schematic Diagram – Main Section (3/3) – ...................... 44

7. EXPLODED VIEWS

7-1. Case (Lower) Section........................................................ 49

7-2. Case (Upper) Section ........................................................ 50

7-3. Chassis Section .................................................................51

7-4. MD Mechanism Deck Section .......................................... 52

8. ELECTRICAL PARTS LIST...................................... 53

MZ-R500/R500PC

SECTION 1

SERVICING NOTE

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-4R)

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.

• 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 (S806 on MAIN board) with a tape in advance. Handle the FLEXIBLE board (overwrite 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 (overwrite head) and the MAIN board with the lead wires in advance. (See page 8)

FLEXIBLE board (Over write head)

panel assy, upper

Tape

laser-tap

OPTICAL PICK-UP FLEXIBLE BOARD

S806

MAIN board

• Replacement of CDX2671-204GA (IC801) used in this set requires a special tool.

• On the set having the microcomputer version 1.000, some adjusted values were set in the manual mode at the shipment, but these data will be cleared when the NV is reset. Therefore, on the set having the microcomputer version 1.000, change the adjusted values following the Change of Adjusted Values immediately after the NV was reset. (See page 18)

• If the nonvolatile memory was replaced on the set, the modified program data must be written to the nonvolatile memory . In such a case, write the modified data that meets the microcomputer version following the patch data rewriting procedure at the replacement of nonvolatile memory. (See page 23)

SECTION 2

GENERAL

MZ-R500/R500PC

This section is extracted from instruction manual.

MZ-R500/R500PC

SECTION 3

DISASSEMBLY

Note : This set can be disassemble according to the following sequence.

Set Case (Lower) Assy Case (Upper) Assy LCD Module

Main Board MD Mechanism Deck

MZ-R500/R500PC

Service Assy, OP

Holder Assy Motor Flexible Board Motor, DC (M602) "Motor, DC (M601)"," Motor, DC (M603)"

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

3-1. CASE (LOWER) ASSY

claw

screw (1.7), MI

screws (1.7), MI

knob (hold)

3-2. CASE (UPPER) ASSY

spring (pop-L), torsion

case(lower) assy

chassis assy

screw (1.7), MI

case (upper) assy

CN801

screws (1.7), M

MZ-R500/R500PC

3-3. LCD MODULE

screws (1.7x3), tapping

LCD module

3-4. MAIN BOARD

terminal (-), battery

Remove the solder

screws (M1.4x2),

toothed lock

CN501

case (upper) ass

Remove the solders

toothed lock

screws (M1.4x2),

CN701

MAIN boar

screw (M1.4x2),

toothed lock

terminal (+), battery

Remove the solder

3-5. MD MECHANISM DECK

MD mechanism deck

boss

MZ-R500/R500PC

chassis assy, se

3-6. SERVICE ASSY, OP

precision pan screw (M1.4)

rack spring (S)

washer (0.8 - 2.5)

gear (SA)

precision pan screw (M1.4)

spring, thrust detent

Pull off the lead screw.

screws (1.7), MI

Opening the over write head

toward the direction OP Service assy toward the direction Note: Do not open the entire assy

forcibly, when opening the over write head.

, remove th

over write head section

MZ-R500/R500PC

3-7. HOLDER ASSY

Open the holder assy.

Remove the holder assy to direction of the arrow

3-8. MOTOR FLEXIBLE BOARD

Remove four solders of DC motor (sled) (M602).

adhesive sheet

Note: Align a circular hole in the stripping paper

with a circular hole in the DC motor (sled), when mounting the motor flexible board.

boss

motor flexible board

Remove two solders of DC motor (over write head up/down) (M603).

Remove four solders of DC motor (spindle) (M601).

3-9. MOTOR, DC (M602)

Remove six solders of motor flexible board.

three precision pan screws (M1.4)

DC motor (over write head up/down) (M603)

two precision pan screws (M1.4)

chassis assy, gear

screw (M1.2 × 1.5)

gear (HA)

gear (HB)

washer (0.8 - 2.5)

gear (HC)

DC motor (spindle) (M601)

DC motor (over write head up/down) (M603)

gear chassis assy

gear (HA)

2.65 mm

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

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

DC motor (sled) (M602)

two precision pan screws (M1.4)

Remove four solders of motor flexible board.

MZ-R500/R500PC

washer (0.8 - 2.5)

gear (SA)

3-10. “MOTOR, DC (M601)”, “MOTOR, DC (M603)”

MZ-R500/R500PC

SECTION 4

TEST MODE

4-1. 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.

4-2. Setting Method of T est Mode

There are two different methods to set the test mode: 1 Short TAP801 (TEST) on the MAIN board with a solder bridge

(connect pin 3 of IC801 to the ground). Then, turn on the power.

MAIN BOARD (SIDE B)

4-3. 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 dis-

play.

This set LCD display

All lit

SYNCMONO REC REMAIN

SHUFREC

-a 8 8 : 8 8

All off

Microcomputer version display

00 6

• When the time is held so that display can be checked.

X key is pressed and hold down, the display at that

V1.200

AP856

AP526

AP529

AP530

R811

AP528

C521

C815

AP531

R805

TAP801

(TEST)

FB801

C830

C807

AP802

AP803

C808

R810

R830

R806

R807

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

ing the [VOL --] key press the following order:

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

Caution: On the set having the microcomputer version 1.000,

some adjusted values were set in the manual mode at the shipment, but these data will be cleared when the NV is reset. Therefore, on the set having the microcomputer version 1.000, change the adjusted values following the Change of Adjusted Values immediately after the NV was reset (see page 18).

4-4. Releasing the Test Mode

For test mode set with the method 1: Turn off the power and open the solder bridge on T AP801 (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: Turn off the power. Note: If electrical adjustment (see page 18) has not been finished

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

start in normal mode)

4-5. Configuration of T est Mode

x key N key

Major item switching

Minor item switching

Medium item switching

. key: Unit Place of item number

decrease.

VOL – key: 10th Place of item number decrease.

VOL + key: 10th Place of item number increase.

VOL – key: Decreases the adjusted value

VOL + key: Increases the adjusted value

VOL – key: 100th Place of item number decrease.

VOL + key: 100th Place of item number increase.

N key: Unit Place of item number increase.

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

Adjusted value variation

Adjusted value write

Test mode (Display Check Mode)

Press the > or VOL+ key

Manual Mode

Press the x key

Press the . or VOL– key

Overall Adjustment Mode

Press the x key

ENTER key

Self-Diagnosis Result Display Mode

Press the x 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

MZ-R500/R500PC

4-6. 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. Setting the test mode (see page 12).

2. Press the > or[VOL +] key activates the manual mode where

Press the N or T.MARK + N keys.

Sound Skip Check Result Display Mode

Press the x key

Press the T.MARK + X keys.

Key Check Mode

The key check quits,or open the upper panel

the LCD display as shown below.

This set LCD display

0 0 0 Manual

3. During each test, the optical pick-up moves outward or in-

4. Each test item is assigned with a 3-digit item number;

ward while the > or . key is pressed for several seconds respectively.

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).

MZ-R500/R500PC

0 XX1

0 XXN

0 XXN1

0 XXN2

0 XXR_

:Error code

:Total recording time

5. The display changes a shown below each time the

[ENTER] key on the set is pressed.

• Address & Adjusted V alue Display

This set LCD display

0 11

item number

• Jitter Value & Adjusted Value Display

This set LCD display

0 11

item number

• Block Error Value & Adjusted Value Display

This set LCD display

0 11

item number

• ADIP Error Value & Adjusted Value Display

This set LCD display

3A4S1D

adjustment valu address

OFEJ1D

adjustment valu jitter value

063B1D

adjustment valu block error value

4-8. 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. Setting the test mode (see page 12).

2. In the display check mode, press the [ENTER] key activates the

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

This set LCD display

0 XX

error display code

history code

1 0000

Total recording time when error occurred

0 11

item number

• Item Title Display

This set LCD display

0 11

item number

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

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

072A1D

LrefPw

x key to return to the

4-7. 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 18).

adjustment valu ADIP error value

item title

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

4. Quit the self-diagnosis result display mode, and press the x key to return to the test mode (display check mode).

. key is pressed.

> key is pressed, LCD display descends

MZ-R500/R500PC

• 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

03 Focus error Fcus Disordered focus 04 Spindle error Spdl Abnormal rotation of disc

TOC error

Power supply system error 22 Low battery LBat Momentary interruption detected

Offset system error

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

Adrs Attempt to access an abnormal address

ABCD Focus error ABCD offset error

TE Tracking error Offset error

X1TE X1 tracking error Offset 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

4-9. Reset the error display code

After servicing, reset the error display code.

• Setting method of Reset the Error Display Code

1. Setting the test mode (see page 12).

2. Press [ENTER] key activates the self-diagnosis result display mode.

3. To reset the error display code, press the X key (2 times) when the code is displayed (except “R_****”). (All the data on the 1, N, N1, and N2 will be reset)

MZ-R500/R500PC

)

This set LCD display

8 8 8

RMC OK

This set LCD display

8 8 8 FF

4-10. 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 12).

2. Press the N key or [T.MARK] + [PLAY] keys, and the play-

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

This set LCD display

0 00

Total count of play system errors(hex.)

3. When the N key is pressed, total error count is displayed on

the LCD, and each time the > key is pressed, the display item moves down by one as shown below. Also, if the . key is pressed, the display item moves up by one, then if the

P R

Total count record system errors(hex.)

[T.MARK] + N keys is pressed, the display in the record

mode appears. When the [T.MARK] + N keys is pressed, total error count is displayed on the LCD, and each time the > key is pressed, the display item moves down by one as shown below. Also, if the . key is pressed, the display item moves up by one, then if the N key is pressed, the display in the play mode appears.

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

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

BOvr

Bful Rtry Retry times over

Buffer is full, and sounds were dumped

Buffer capacity becomes less, and forcible writing occurred

x key.

4-11. Key Check Mode

This set can check if the set function normally.

• Setting Method of Key Check Mode

1. Setting the test mode (see page 12).

2. Press the [T.MARK] + X keys activates the key check mode. (At the last two digits, AD value of remote commander key line is displayed in hexadecimal)

Playing sound skip result display

0 00 P R

0 00 EIB

0 00 Stat

0 00 Adrs

0 00 BEmp

0 00 ######

P R

:Total play/record errors(hex.) :Counter of sound skip check each item(hex.) :6-di

######

it address where sound was skipped last(hex.

Recording sound skip result display

0 00 P R

0 00 BOvr

0 00 Bful

0 00 Rtry

0 00 ######

3. When each key on the set and on remote commander is pressed, its name is displayed on the 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)

Example1: When > key on the set is pressed:

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:

This set LCD display

8 8 8 RMC OK

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.

MZ-R500/R500PC

This set LCD display

0 2 1 ResNV

This set LCD display

0 2 1 ResOK?

: Address

E4: Adjusted value

This set LCD display

8 3 2

SE4

SECTION 5

ELECTRICAL ADJUSTMENTS

5-1. Outline

• In this set, automatic adjustment of CD and MO can be performed by entering the test mode (see page 12). 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 display on the set is shown.

5-2. 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 ............................................... OFF

5-3. Adjustment Sequence

• Setting method of NV reset

1. Select the manual mode of the test mode, and set item number 021NV Reset (see page 13).

2. Press the X key.

3. Press the X key once more.

This set LCD display

0 2 1

Res

NV reset(after several seconds)

Reset!

1. NV Reset(Memory clear)

2. Power Supply Manual Adjustment

3. Temperature Correction(item number:014)

4. Laser Power Check

5. Electrical offset Adjustment

Caution: This adjustment must be made with no disc loaded.

6. CD Overall Adjustment

7. MO Overall Adjustment

8. RESUME Clear

Manual Mode

Overall Mode

Manual Mode

Overall Mode

Manual Mode

5-4. NV Reset

Caution: On the set having the microcomputer version 1.000,

4. Press the x key to quit the manual mode, and activate the test mode (display check mode).

• Change of Adjusted Values

On the set having the microcomputer version 1.000, some adjusted values were set in the manual mode at the shipment, but these data will be cleared when the NV is reset. Therefore, on the set having the microcomputer version 1.000, modify the adjusted values through the following procedure immediately after the NV was reset.

1. Item numbers in which the adjusted values are to be modified Item number 832 Item number 862 Item number 871 Item number 872

2. Adjusted values modifying procedure

1) Select the manual mode of the test mode, and set item number 832 (see page 13).

This set LCD display

8 3 2

2) Adjust with the key (adjusted value down) so that the adjusted value becomes E4.

[VOL+] key (adjusted value up) or [VOL--]

Pw-T W

+ 40 hidden pages

Sony MZR-500-PC Service manual

TABLE OF CONTENTS

SERVICING NOTE

GENERAL

DISASSEMBLY

case(lower) assy

case (upper) assy

LCD module

MD mechanism deck

motor flexible board

TEST MODE

Manual Mode

ELECTRICAL ADJUSTMENTS