Yamaha MDX-596 Service Manual

MDX-596

MINIDISC RECORDER

MDX-596

SERVICE MANUAL

A - B

REPEAT

( ) ✽–&

PROG

STU VWX YZ /

CHAR.

NUMBER

M-MARK MONO/ST

SKIP

DISPLAY?! SCROLL

DELETE

REC

This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel. It has been assumed that basic service procedures inherant to the industry, and more specifically YAMAHA Products, are already known and understood by the users, and have therefore not been restated.

WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in personal

injury, destruction of expensive components and failure of the product to perform as specified. For these reasons,

SET

INPUT

SYNCTIME

IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authorization, certification or

The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and service departments of YAMAHA are continually striving to improve YAMAHA products. Modifications are, therefore, inevitable and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the distributor's Service Division.

we advise all YAMAHA product owners that all service required should be performed by an authorized YAMAHA Retailer or the appointed service representative.

recognition of any applicable technical capabilities, or establish a principle-agent relationship of any form.

S/F

RNDM

ABC DEF GHI JKL MNO

PQR

617283940

SPACE

+10

TITLE

PLAY PAUSE STOP REC

WDASCD-P

WARNING: Static discharges can destroy expensive components. Discharge any static electricity your body may have accumu-

IMPORTANT: Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit.

lated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this buss).

■ CONTENTS

TO SERVICE PERSONNEL . . . . . . . . . . . . . . . . . 1—2

REAR PANELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

INTERNAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

DISASSEMBLY PROCEDURES . . . . . . . . . . . . . . 4—6

ADJUSTMENT & TEST MODE . . . . . . . . . . . . . . 7—16

SPECIAL TEST MODE . . . . . . . . . . . . . . . . . . . . . . .17

ERROR DISPLAY . . . . . . . . . . . . . . . . . . . . . . . 18—19

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . 20—24

IMPORTANT NOTICE

MDX-596

IC DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25—34

BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . 35—37

TEST POINT WAVEFORMS . . . . . . . . . . . . . . .38—39

PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . 40—46

MD VOLTAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . 48—50

REMOTE CONTROL TRANSMITTER . . . . . . . . . . .51

PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52—61

GREASE APPLICATION DIAGRAM . . . . . . . . . . . .62

100718

MDX-596

■ TO SERVICE PERSONNEL

Critical Components Information Components having special characteristics are marked Z and must be replaced with parts having specifications equal to those originally installed.

WALL OUTLET

EQUIPMENT UNDER TEST

INSULATING TABLE

AC LEAKAGE TESTER OR EQUIVALENT

WARNING: Laser Safety

This product contains a laser beam component. This component may emit invisible, as well as visible radiation, which may cause eye damage. To protect your eyes and skin from laser radiation, the following precautions must be used during servicing of the unit.

1) When testing and/or repairing any component within the product, keep your eyes and skin more than 30 cm away from the laser pick-up unit at all times. Do not stare at the laser beam at any time.

2) Do not attempt readjustment, disassembly or repair of the laser pick-up, unless noted elsewhere in this manual.

3) CAUTION : Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

R, G, B models

Cover (MD)

Laser Emitting conditions:

1) When the Cover (MD) is removed, and the POWER SW is turned to the "ON" position, the laser component will emit a beam for several seconds to detect if a disc is present. During this time (5-10 sec.), the laser may radiate through the lens of the laser pick-up unit. Do not attempt any servicing during this period!

MDX-596

If no disc is detected, the laser will stop emitting the beam. When a disc is set, you will not be exposed to any laser emissions.

2) The laser power level can be adjusted with the VR on the pickup PWB, however, this level has been set by the factory prior to shipping from the factory. Do not adjust this laser level control unless instruction is provided elsewhere in this manual. Adjustment of this control can increase the laser emission level from the device.

MDX-596

Laser Diode Properties

Material : GaAlAs Wavelength : 785 nm Emission duration : Continuous Pulse Durations and Max. Output at the lens of the Laser Pick Up Unit ; Read mode : 0.8 mW (Continuous) Write mode : Max 10 mW for 0.5s, Min. Cycle 1.5s

ANSI Class : Class 1

* This output is the value measured at a distance of about 200 mm from

the objective lens surface on the Optical Pick-up Block.

VARO! : AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA NÄKYMÄTTÖMÄLLE

LASER-SÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN.

VARNING! : OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD OCH SPÄRREN ÄR URKOPPLAD.

BETRAKTA EJ STRÅLEN.

Magnetic head

Optical pick-up

■ REAR PANELS

▼ R model

▼ G, B models

▼ A model

MDX-596

■ SPECIFICATIONS

Digital audio system

System

MiniDisc digital audio system

Disc

MiniDisc

Recording method

Magnetic field variation overwrite

Reading method

Non-contact optical pickup (using semiconductor laser)

Laser

Semiconductor laser

Laser Diode Properties

Material: GaAIAs Wavelength: 785 nm Pulse time: Read mode ... 0.8 mW Continuous Write mode ... max 10 mW 0.5S

min cycle 1.5S Repetition

Record/playback time

Max. 80 minutes

80 minutes (stereo) 160 minutes (mono)

Revolutions

Approx. 400~900 rpm (CLV)

Error Correction

ACIRC (Advanced Cross Interleave Reed-solomon Code)

Sampling frequency

44.1 kHz (32 kHz and 48 kHz signals converted to 44.1 kHz for recording)

Coding

ATRAC (Adaptive TRansform Acoustic Coding)

Modulation system

EFM (Eight-to-Fourteen Modulation)

Number of channels

2 (stereo) or 1 (mono, for extended recording)

Frequency Response

5 ~ 20,000 Hz ±0.5 dB

Signal-to-Noise Ratio

More than 99 dB during playback

Wow and Flutter

Below measurable limit

GENERAL

Power Supplies

A model AC 240 V, 50 Hz G, B models AC 230 V, 50 Hz R models AC 110/120/220/240 V, 50/60 Hz

Power Consumption

18 W

Dimensions (W x H x D)

435 x 96 x 288 mm (17-1/8" x 3-3/4" x 11-5/16")

Weight

4.0 kg (8 lbs. 13 oz.)

Finish

Titanium color/Black color

Accessories

Remote Control.... 1

Audio cord... 2 Optical cord... 1

Batteries (size AA, R6, UM-3).... 2

Specifications subject to change without notice.

R : General model A : Australian model B : British model G : European model

* US and foreign patents licensed from Dolby Laboratories

Licensing Corporation.

6.7

(1/4")

Inputs

LINE IN (REC)

Type: pin jack Input impedance: greater than 50 k-ohms Standard input level: 300 mV

MDX-596

DIGITAL IN (OPTICAL) 1/2

Type: square optical connector jack

Outputs

LINE OUT (PLAY)

Type: pin jack Standard output level: 2.0 ± 0.5 Vrms

DIGITAL OUT (OPTICAL)

Type: square optical connector jack

PHONES

Standard output level (Input 150 ohms shorted, – 20 dB): 300 ± 60 mV

435 (17–1/8")

265.9 (10–1/2")

287.8 (11–5/16")

15.2

(5/8")

(3–1/8")

(3–3/4")

(5/8")

Units : mm (inch)

■ INTERNAL VIEW

MDX-596

q POWER TRANSFORMER w MAIN (1) P.C.B. e POWER SWITCH r MD RECORDER UNIT t MAIN (2) P.C.B.

CB401

■ DISASSEMBLY PROCEDURES

(Remove parts in disassembly order as numbered.)

1. Removal of Top Cover

a. Remove 4 screws ( q ) and 3 screw

2. Removal of Front Panel

a. Remove 4 connectors.

CB5, CB6, CB7, CB401

b. Remove 3 screws

* Arrow marks ( ) are printed to identify the screws to be

removed.

c. Remove 2 screws

( e )

( r )

in Fig. 1

3. Removal of MD Recorder Unit

a. Remove 1 connector.

CB1 b. Remove 4 screws ( t ) in Fig. 1. c. Remove 4 screws ( y ) in Fig. 2.

( w )

in Fig. 1.

q w

CB1

CB5

e r t

Top Cover

MD Recorder Unit

CB6

CB7

MD Recorder Unit

Front Panel

Fig. 1

Support (Mechanism)

Fig. 2

MDX-596

Disassembly of MD Recorder Unit

Remove the MD Recorder unit according to Steps 1 and 3 of the disassembly procedure (page 4).

Removal of MD Main P.C.B. and MD Mechanism (Fig. 3)

1. Remove 3 screws (K1) and then remove the Top Cover.

2. Remove 2 screws (K2) and then remove the Bottom Cover.

3. Disconnect 3 flat connecting cables (K3).

4. Disconnect the flexible P.C.B. for the optical pickup (K4).

5. Disconnect a connector (K5).

6. Remove 2 screws (K6) and then remove the MD Main P.C.B.

7. Remove the spring (K7).

8. Remove 1 screw (K8) and then remove the Side Cover.

9. Remove 4 cushions (K9) from the bosses of the MD Mechanism.

(K1)x1 ø2x 3mm

Top Cover

MD Mechanism

Boss

Spring (K7)x1

(K1)x1 ø2x 3mm

Cushion

(K9)x2

(K8)x1 ø2x 3mm

Boss

Removal of Magnetic Head (Fig.4)

• Once the magnetic head is removed, it will be neces-

sary to perform “Confirmation of magnetic head installation Position”. (See page 13.)

MDX-596

1. Remove screw (A1).

Caution

a. When removing the magnetic head, hold its base and

do not touch the magnetic head itself or the leaf

spring. b. Place the magnetic head upside down. c. Use special care so as not to cause any damage to

the magnetic head when installing it.

Side Cover

(K3)x2

Pull

(K4)x1 Flexible P.C.B. for optical pickup (*1)

(*1) After pulling off the flexible P.C.B. for the optical pickup from the connector, cover its end with aluminum foil or the like which is electrically conductive so as to prevent the optical pickup from being damaged by static electricity.

Leaf Spring

MD Mechanism

MD Main P.C.B.

(K2)x1 ø2x 2mm

(A1)x1

ø1.7x 5mm

Cushion (K9)x2

(K3)x1

(K5)x1

(K6)x2 ø1.7x 3mm

(K2)x1 ø2x 3mm

Bottom Cover

Magnetic Head

Fig. 3

Fig. 4

MDX-596

Removal of MD Loading P.C.B./Loading Motor (Fig. 5)

1. Remove 1 screw (B1).

2. Remove 3 hooks (B2) and then remove the MD Loading P.C.B.

3. Remove 2 screws (B3) and then remove the Loading Motor.

Removal of Sled Motor/Optical Pickup Head (Fig. 6)

• Once the MD mechanism switch P.C.B. is removed, it

will be necessary to perform “Adjustment of Lead-in Switch Position”. (See page 13.)

• Once the optical pickup head is removed, it will be

necessary to perform “Confirmation of magnetic head installation Position”. (See page 13.)

Loading Motor

(B2)x2

Optical Pickup Head

(B3)x2 ø1.7x 3mm

(C1)x1 ø1.4x 5mm

(B1)x1 ø1.7x 6mm

MD Loading P.C.B.

(B2)x1

(C1)x2 ø1.4x 4.5mm

Sled Motor

MD Mechanism P.C.B.

Fig. 5

1. Remove 3 screws (C1) and then remove the sled motor.

2. Remove the Optical Pickup Head.

Caution Use care so as not to cause any damage to the gear. (The damaged gear will cause abnormal noise to occur while searching.)

Removal of Spindle Motor (Fig. 7)

• Once the spindle motor is removed, it will be necessary to perform “Pickup Rating”. (See page 14.)

1. Remove 3 screws (D1) and then remove the Spindle

Motor.

Caution

a. Be careful not to scratch the gear.

(Scratched gear will produce noises during searching.)

b.As the turn-table is magnetized, keep foreign objects

from being attracted.

(D1)x3

ø1.4x 3mm

Fig. 6

MDX-596

Spindle Motor

Fig. 7

MDX-596

■ ADJUSTMENT & TEST MODE

Servicing Procedure

Perform adjustment and setup in the TEST mode. Specific adjustments and procedures vary depending on the type of servicing performed.

Required item

Type of servicing

PICKUP replacement Magnetic head replacement Mechanical unit replacement (including PICKUP) MD main PCB replacement MD microprocessor (IC1401) replacement MD LSI (IC1201) replacement RF IC (IC101) replacement EEPROM IC (IC1402) replacement

TEMP standard

setting TEMP

q q

Numbers in the table, e.g., q, w, e, indicate the order in which required items should be performed. "–" means that item needs not be performed.

– – –

–

EEPROM setting

value confirmation

EEPROM SET

–

w q

w w

AUTO preliminary

adjustment AUT YOBI

–

q e e

AUTO

adjustment

AUTO AJST

–

w r r

AUTO AFB adjustment

AUT AFB

–

e t t

EEPROM adjustment

value entry (*1)

TEST mode cancel

–

y w

r y y

(With AUTO main adjustment done in advance)

Operation confirmation

TEST-PLAY

–

u e

t u u

TEST-REC

u q u

i r

y i i

(*1): The result of EEPROM entry is displayed at the end of the TEST mode. OK_EEPROM: Both "setting value" and "preliminary adjustment completed" have been entered properly. WR_EEPROM: The "setting value" has been entered properly but not "preliminary adjustment completed".

Perform preliminary adjustment properly and then enter "preliminary adjustment completed".

NG_EEPROM: The "setting value" has not been entered.

Check the MD microprocessor and EEPROM for connection.

Preparation before Adjustment

● Test disc

Type Test disc

High reflecting disc TDYS1 (SONY) [for reproduction] (P/No. TX945850) Low reflecting disc Commercially available mini disc for recording Low reflecting disc MMD-318 [for pre-adjustment] (P/No. AAX04890) – – – – – – – – Clear disc for checking the head (P/No. AAX18050)

● Extension cable

Type Part No.

1. Extension P.C.B. for servicing AAX16660

2. 2-pin extension connector for servicing AAX16620

3. 6-pin flat cable for servicing AAX16640

4. 5-pin flat cable for servicing TX946190

5. 28-pin flat cable for servicing TX946220

TEST MODE

1. How to enter the test mode

1) Press the POWER button while pressing the SET/ENTER button and the PLAY/PAUSE button.

MDX-596

Version of microprocessor is displayed about 1 second.

t s m 1 C * * e * *

Version of EEPROM protect data (from 01) Version of microprocessor ROM (from 01)

(see connection diagram on page 14.)

“EJECT” on display

2) Load either a disc for reproduction or a disc for recording. “AUTO AJST” on display

2. How to set to each mode

Every time the DISPLAY (forward) or EDIT (reverse) button is pressed, the mode changes. (For operation of each mode, refer to the section describing each mode.)

AUTO_AJST (AUTO adjustment)

AUT_AFB (AUTO AFB adjustment)

RST_YOBI (RESULT preparation)

RESULT (RESULT)

Since this mode is not required for servicing , proceed to another mode promptly.

MNU_YOBI (MANUAL preliminary adjustment)

MNU_AJST (MANUAL adjustment)

EEPROM_SET (EEPROM setting)

AUT_YOBI (AUTO preliminary adjustment)

MDX-596

● Panel keys used in TEST mode

Panel key Function

REC TEST mode end (entry of EEPROM) 1FH EJECT Eject B3H DISPLAY Menu feeding in TEST mode (1) / (Feeding of menus mainly related to adjustment and EEPROM) B2H TITLE CHARA. EDIT Menu feeding in reverse in TEST mode (Menu feeding in reverse in each TEST mode) A8H SET/ENTER Finalization of menu selection or starting of its execution A2H DELETE/CANCEL Stopping each test item and shifting to menu selection at one step upper level A7H SEARCH w Forced feeding of the slide (in FWD direction) / Execution of JUMP function (FWD) AAH

SEARCH e Forced feeding of the slide (in REV direction) / Execution of JUMP function (REV) ACH

JOG DIAL y Forced feeding of the disc to EJECT / setting value increased F3H JOG DIAL t Forced feeding of the disc to LOAD / setting value reduced F4H INPUT RANDOM – REPEAT S/F – REPEAT A-B – SCROLL – PLAY/PAUSE – STOP –

Menu feeding in TEST mode (2) / (Feeding of menus mainly related to continuous playback and continuous recording) Menu feeding in TEST mode (3) (Feeding of menus mainly related to INNER mode and JUMP SELECT)

ADDRESS setting value increased / Specification of direction when setting the tracking

ADDRESS setting value reduced / Specification of direction when setting the tracking

Switching of laser power at EJECT / switching of display for continuous playback / switching of digit setting when setting ADDRESS

Command code

B4H F2H

F5H

MDX-596

3. How to cancel test mode (Entry of EEPROM adjustment value)

1) Be sure to perform AUTO preliminary adjustment, AUTO adjustment and AUTO AFB adjustment. ( “COMPLETE” appears on the display)

2) After completing above ajustments, press the REC button. (Entry to EEPROM initiates then.) The TEST mode is completed. ( “Test End” appears on the display)

3) Press the EJECT button to take out the disc.

4) Turn off the power.

MDX-596

Description of TEST modes

1. EJECT mode To TEMP setting (of EEPROM setting)

[ _ _ EJECT _ _ _ ] To CONTROL setting (of EEPROM setting)

Laser power setting (record/reproduction power) is performed.

2. AUTO preliminary adjustment mode Automatic preliminary adjustment is performed.

[ _ AUT _ YOBI _ ] Adjusted values are output by using the interface.

3. AUTO adjustment mode Automatic adjustment is performed. (Grating adjustment mode after this adjustment.)

[ AUTO _ AJST _ ] Adjusted values are output by using the interface.

Continuous reproduction is performed. (Error rate on display, jump test)

4. AUTO AFB adjustment mode Automatic focus balance adjustment is performed.

[ _ AUT _ AFB _ _ ] Adjusted values are output by using the interface.

RESULT preparation mode Not used (Do not use this function as it is not for servicing)

[ _ RST _ YOBI _ ]

RESULT mode (main adjustment) Not used (Do not use this function as it is not for servicing)

[ _ RESULT _ _ _ ]

MANUAL preliminary adjustment mode Not used (Do not use this function as it is not for servicing)

[ _ MNU _ YOBI _ ]

MANUAL adjustment mode Not used (Do not use this function as it is not for servicing)

[ _ MNU _ AJST _ ]

5. EEPROM setting mode Various factors of the digital servo function are changed manually.

[ EEPROM _ SET ] The voltage is measured at the temperature detect terminal and the standard value is set.

6. TEST-PLAY mode Continuous reproduction from the specified address is performed.

[ TEST _ PLAY _ ] C1 error rate is measured and ADIP error rate is measured.

7. TEST-REC mode Continuous recording from the specified address is performed.

[ TEST _ REC _ _ ]

8. INNER mode The position where the INNER switch is turned ON is measured.

[ _ _ INNER _ _ _ ]

1. EJECT mode

Step Setting method Remark Display

1 2 3

MDX-596

4 5

6 7 8

EJECT status in the TEST mode Press the INPUT button. Press the INPUT button. Press the INPUT button. Press the TITLE edit button.

Press the CHARA. button. Press the DISPLAY button. Press the DELETE/CANCEL button.

EJECT menu (No disc is loaded.) Reproduction power output status Recording power output status Since this mode is not required for servicing , proceed to another mode promptly. To TEMP setting (Refer to TEMP setting) To CONTROL1 setting To CONTROL2 setting EJECT menu

[ _ _ EJECT _ _ _ ] [ ppw _ _ _ _ _ _ _ ] [ rpw _ _ _ _ _ _ _ ] [ xpw _ _ _ _ _ _ _ ] [ TEMP _❍ ❍ _◆ ◆]

[ CONTROL1 _ 08 ] [ CONTROL2 _ 02 ] [ _ _ EJECT _ _ _ ]

MDX-596

Check procedure Mode

q Playback power output “ppw” DC 0.2V OK (Move on to check w.) –

w Recording power output “rpw” DC 1.8V OK (End of checking.) –

“rpw” not achieved. – NG Perform *1.

*1: Poor soldering of the line at Pin 100 of IC1401.

Check the line of Pin 93 of IC1401 for short and poor soldering. (Check all the way to the SW P.C.B.)

*2: Check the line of Pin 3 of IC1401 for poor soldering and short with other patterns.

Check the pick-up laser for breakage.

Check item

(Pin 3 of IC1401)

DC 1.5V NG Perform *1.

Less than DC1.5V NG Perform *2.

Judgement

Possible cause and check content

● Confirmation of pick-up laser power

Recording and reproduction can be checked by using the laser power meter. However it should be used for checking only because there is variation in its measurement. When the measured value is excessively deviated from the reference value, replace the pick-up.

Reference value (measured at room temperature of 25 °C) During reproduction (ppw) : 0.72 ± 0.1 mW During recording : 5.5 ± 0.5 mW

Note :Be very careful when using the laser power meter. The laser beam would cause damage to

your eye if exposed to it directly.

● TEMP (temperature standard) setting

(Make this setting quickly when the room temperature is within the range of 21 ˚C to 29 ˚C and the P.C.B. is cold.)

(1) Set to the TEMP setting mode menu.

[ TEMP ❍ ❍ ◆ ◆ ]

❍ ❍ : Temperature measured value

◆ ◆ : Temperature setting value

(2) Make temperature correction based on the ambient temperature and according to the following

table.

Ambient temperature Correction value

˚C ~ + 23.2 ˚C

+ 21.0 + 23.3 + 26.9

˚C ~ + 26.8 ˚C ˚C ~ + 30.7 ˚C

– 1H

± 0H

+ 1H

Example : When the temperature measured value is 7AH and the ambient temperature is 22 ˚C:

7AH (measured value) - 01H (correction value) = 79H (setting value)

* If the temperature measured value deflects between two values, use the smaller value (If 7AH and 79H in the

above example, use 79H.)

(3) Using the jog dial, match the value obtained in Step (2) with the temperature setting value.

Example : When the temperature measured value is 7AH and the ambient temperature is 22 ˚C:

[ TEMP 7A 79 ]

Temperature setting value

MDX-596

2. AUTO preliminary adjustment mode Disc in use: MMD-318 [for pre-adjustment]

Step Setting method Remark Display

Set the Test mode.

Load a disc.

Press the EDIT button once.

Press the SET/ENTER button once.

Adjusted values are output. Adjustment is completed.

When adjustment is OK, press the DELETE/CANCEL button.

When adjustment is NG, press the DELETE/CANCEL button.

No disc is loaded.

Auto adjustment menu Auto preliminary adjustment menu Auto preliminary adjustment is started after sliding to the innermost track. “ *** ” changes in the following order during automatic adjustment.

HAo -> ................. -> TCO

Proceed to Step 5 when adjustment is OK. Proceed to Step 6 when adjustment is NG.

The display returns to the AUTO preliminary adjustment menu. There is an abnormality at the adjusted point such as HAo. Refer to “Troubleshooting”. (page 20)

[ EJECT ] [ LOADING ] [ AUTO _ AJST _ ] [ _ AUT _ YOBI _ ] [ *** : _ _ _ _ _ _ ]

[ _ COMPLETE _ ] [ Can't _ ADJ. ]

[ _ AUT _ YOBI _ ] [ Can't _ ADJ. ]

3. AUTO adjustment mode Disc in use: TDYS1 (SONY) [for reproduction] or commercially available mini disc for recording

Step Setting method Remark Display

Set the TEST mode.

Load a disc.

Press the SET/ENTER button once.

Adjusted values are output. Adjustment is completed.

When adjustment is OK, press the SET/ENTER button.

Press the INPUT button. Press the DELETE/CANCEL button.

When adjustment is NG, press the DELETE/CANCEL button.

No disc is loaded.

AUTO adjustment menu Automatic adjustment is started after sliding to the innermost track. “ *** ” changes in the following order when a high reflecting disc (disc for reproduction) is used. PEG -> HAG “ *** ” changes in the following order when a low reflecting disc (disc for recording) is used. PEG -> LAg -> GCG -> GEG -> LAG Proceed to Step 4 when adjustment is OK. Proceed to Step 6 when adjustment is NG.

Continuous reproduction (bit section) (Address + C1 error display) Continuous reproduction (group section) (Address + C1 error display) Continuous reproduction (group section) (Address + ADIP error display) Display returns to the AUTO adjustment menu display. There is an abnormality at the adjusted point such as PEG.

Refer to “Troubleshooting”. (page 20)

Note) *** : Adjustment name, XXXX: Address, YYYY: Measured value

4. AUTO AFB adjustment mode Disc in use: Commercially available mini disc for recording

MDX-596

Step Setting method Remark Display

Set the Test mode.

Load a disc.

Press the DISPLAY button once.

Press the SET/ENTER button once.

Press the DELETE/CANCEL button.

No disc is loaded.

Auto adjustment menu Auto AFB adjustment menu Auto AFB adjustment is started.

Adjusted values are output.

The display returns to the AUTO AFB adjustment menu.

[ EJECT ] [ LOADING ] [ AUTO _ AJST _ ] [ *** : _ _ _ _ _ _ ]

[ _ COMPLETE _ ] [ Can't _ ADJ. ]

[ s XXXX c YYYY ] [ a XXXX c YYYY ] [ a XXXX a YYYY ] [ AUTO _ AJST _ ] [ Can't _ ADJ. ]

[ EJECT ] [ LOADING ] [ AUTO _ AJST _ ] [ _ AUT _ AFB _ _ ] [ FAB YY _ ZZZZ ] [ YY _ ZZZZ _ _ _ ] [ _ AUT _ AFB _ _ ]

Note) YY, ZZZZ: Measured value

MDX-596

5. EEPROM setting mode Disc in use: Commercially available mini disc for recording

(used to confirm/adjust setting values) Refer to p.15 for EEPROM setting.

6. TEST-PLAY mode Using the disc: Commercially available mini disc for recording

(Use this mode to check that the playback function is provided at the specified address.)

Step Setting method Remark Display

Load a disc.

Press the TITLE button.

Press the INPUT button.

Press the SET/ENTER button.

Press the INPUT button.

Press the DELETE/CANCEL button.

• Every time the TITLE button is pressed in the address setting mode, the address changes in the order of 0032-> 03C0 -> 0700 -> 08A0

-> 0950 -> —

• Pressing the DISPLAY button in the TEST-PLAY menu changes to the AUTO adjustment menu.

AUTO adjustment menu TEST-PLAY menu ADDRESS setting (The initial value of the target address is displayed.) Continuous reproduction (bit section) (Address + C1 error display) Continuous reproduction (group section) Continuous reproduction (group section) (Address + ADIP error display)

TEST-PLAY menu

(Address + C1 error display)

[ AUTO _ AJST _ ] [ TEST _ PLAY _ ] [ ADRES _ 0032 ] [ s XXXX c YYYY ] [ a XXXX c YYYY ] [ a XXXX a YYYY ]

[ TEST _ PLAY _ ]

7. TEST-REC mode Disc in use: Commercially available mini disc for recording

(It is used to check the REC function at the specified address.)

Step Setting method Remark Display

Load a disc.

Press the TITLE button twice.

Press the SET/ENTER button.

Press the DELETE/CANCEL button.

• Every time the TITLE button is pressed in the address setting mode, the address changes in the order of 0032-> 03C0 -> 0700 -> 08A0

-> 0950 -> —

• Pressing the DISPLAY button in the TEST-REC menu changes to the AUTO adjustment menu.

AUTO adjustment menu TEST-REC menu ADDRESS setting (The initial value of the address is displayed.) Continuous recording

TEST-REC menu

[ AUTO _ AJST _ ] [ TEST _ REC _ _ ] [ a0032 _ pw ZZ ] [ a XXXX _ pw ZZ ]

[ TEST _ REC _ _ ]

8. INNER mode Disc in use: Commercially available mini disc for recording

Step Setting method Remark Display

Load a disc.

Press the CHARA. button.

Press the SET/ENTER button.

Press the DELETE/CANCEL button.

• Pressing the DISPLAY button in the INNER menu changes to the AUTO adjustment menu.

AUTO adjustment menu INNER menu INNER switch position is measured. (Both SUBQ address and C1 error are displayed.) INNER menu

[ AUTO _ AJST _ ] [ _ _ INNER _ _ _ ] [ s XXXX c YYYY ]

[ _ _ INNER _ _ _ ]

MDX-596

●

Lead-in switch position adjustment

Adjust the lead-in switch position so that it is between FF85 and FFD2.

1. Load a TDYS1 (SONY) (P/No. TX945850) disc for reproduction.

2. Loosen the screw (A1) (1 pc) attaching the mechanical switch P.C.B.

3. Retighten the screw (A1) (1 pc) while pressing the mechanical switch P.C.B in the arrow A direction in the figure for FF85 or less and in the arrow B direction for FFD2 or more. Measure the lead-in switch position again and check that it is in the range between FF85 and FFD2.

Note) Apply thread lock to the screw (A1) (1 pc) of

(A1) X1

the P.C.B. after tightening it.

Fig.8

● Forced rotation of loading motor

It is possible to force the loading motor to rotate by turning the jog dial when the microprocessor version (tsm1C**e**) of the test mode or EJECT appears on display. (This is used when the disc cannot be ejected.)

JOG DIAL y : Forced feeding of the disc to EJECT JOG DIAL t : Forced feeding of the disc to LOAD

* To obtain the microprocessor version on display when a disc is loaded, “ AUTO _ AJST _ ” appears on display. Press

the DELETE/CANCEL key in this state, and the microprocessor version will appear.

● Confirmation of magnetic head installation position

• After replacing the magnetic head and the optical pick-up, be

sure to confirm their installation positions.

• To facilitate adjustment of their installation positions, bring the

optical pick-up to the center position and follow the procedure

Objective lens

Magnetic head

Circumferentical direction

described below.

1.Load a clear disc (P/No. AAX18050) for checking the head.

2.Push down the up-shift arm of the magnetic head with a finger to

MDX-596

Radial direction

raise the magnetic head.

3.Looking at the unit from above, check if the magnetic head

matches with the optical pick-up objective lens.

4.Check to ensure that the magnetic head moves up and down

smoothly.

Push down with a finger.

Fig.9

MDX-596

MECHANISM ADJUSTMENT

When making an adjustment, be sure to connect an extension cable for servicing and an expansion P.C.B. as shown in Fig.12.

1. Optical pickup rating inspection method

GND (TP1202)

IC1201 No.4 pin

EIN (TP1253)

IC1201 No.11 pin

FIN (TP1254)

IC1201 No.12 pin

(See page E41/J39)

(Externally attached)

100K

470p

100K

Oscilloscope

Fig. 10

GND CH1 CH2

Lissajous waveform

a:b = Within 4:1

After performing automatic adjustment in the AUTO mode selected from the test mode by using a TDYS1 (SONY) (P/ No. TX945850) disc for reproduction (COMPLETE status on display), adjust the EOUT to FOUT Lissajous waveform (x-y).

1. Loosen 3 screws of the spindle motor a little and make adjustment while watching the Lissajous waveform.

2. After adjustment, tighten screws in the order of (q), (w) and (e).

From magnetic head

Mechanism P.C.B.

Adjustment hole

Connector for 2P extension AAX16620

Check the Lissajous waveform while adjusting the installation position by using a screwdriver in the adjustment hole in the spindle motor.

Fig. 11

From optical pickup

Extension P.C.B. for servicing (AAX16660) Install an Extension P.C.B. for servicing to the mechanism.

FFC for 28P extension TX946220

FFC for 6P extension AAX16640

FFC for 5P extension TX946190

Fig. 12

MD Main P.C.B.

MDX-596

5. EEPROM setting mode Disc in use: Commercially available mini disc for recording

(used to confirm/adjust setting values)

1) Start the TEST mode.

2) Load the disc. [AUTO AJST]

3) Press the DISPLAY button 6 times. [EEPROM SET]

4) Execute the procedure to have “EEPROM setting mode transition diagram” displayed and adjust the jog dial so that the same setting values as those in “EEPROM contents list” are obtained. (Refer to p.10 for TEMP setting.)

5) Press the REC button to cancel the TEST mode. (Entry into EEPROM can be started here.)

6) Set to the TEST mode again and perform AUTO preliminary adjustment, AUTO adjustment and AUTO AFB adjustment.

EEPROM SETTING MODE TRANSITION DIAGRAM

Note) To return to the SUB MENU or MAIN MENU display of the test mode, press the DELETE/CANCEL button.

EEPROM CONTENTS LIST

● Focus setting (Focus)

Item on display Set value

FG ❍ ❍ B1 H FF0 ❍ ❍ 10 H FF1 ❍ ❍ 70 H FF2 ❍ ❍ E0 H FZHLEV ❍ ❍ ED H FOKLEVh ❍ ❍ 07 H FOKLEVL ❍ ❍ 09 H FOSTn ❍ ❍ 2C H DISCJG ❍ ❍ 14 H

● Spin setting (Spindle)

Item on display Set value

SPG ❍ ❍ 10 H SPG-in ❍ ❍ 5C H SPG-mid ❍ ❍ 48 H SPG-out ❍ ❍ 38 H SP1 ❍ ❍ 10 H SP2 ❍ ❍ 93 H SP3 ❍ ❍ ED H SP4 ❍ ❍ EE H SP5 ❍ ❍ 20 H SPDLIM ❍ ❍ 64 H SPKLEVm ❍ ❍ 15 H

● Tracking setting (Tracking)

Item on display Set value

TG ❍ ❍ 6B H TF0 ❍ ❍ 10 H TF1 ❍ ❍ 6B H TF2 ❍ ❍ F0 H FT3 ❍ ❍ 08 H SVCNT4 ❍ ❍ 01 H TRBLVo ❍ ❍ 68 H TRBLVt ❍ ❍ 50 H TRKLVo ❍ ❍ 60 H TRKLVt ❍ ❍ 2E H TDPWo ❍ ❍ 67 H TDPWt ❍ ❍ 21 H SLCTo ❍ ❍ 00 H SLCTt ❍ ❍ 50 H SLCTm ❍ ❍ 53 H TCRSC1P ❍ ❍ 16 H TCRSC0h ❍ ❍ 00 H TCRSC0L ❍ ❍ FA H TCRSCHh ❍ ❍ 02 H TCRSCHL ❍ ❍ 02 H COTLVP ❍ ❍ 05 H COTLVr ❍ ❍ 15 H JPint ❍ ❍ 00 H KIK10 ❍ ❍ 64 H

● Slide setting (Sled)

Item on display Set value

SLG ❍ ❍ 3E H SL2 ❍ ❍ 10 H SLDLIM ❍ ❍ 7F H SLDLEV ❍ ❍ 12 H SLKLVk ❍ ❍ 55 H SLKLVt ❍ ❍ 2E H SLKLVm ❍ ❍ 55 H SLBKm ❍ ❍ 08 H SLKrio ❍ ❍ 60 H SLKroi ❍ ❍ 68 H SLK1io ❍ ❍ 68 H SLK1oi ❍ ❍ 60 H

● Control setting (Control)

Item on display Set value

CONTROL1 ❍ ❍ 08 H CONTROL2 ❍ ❍ 02 H ADJTTM ❍ ❍ 14 H HDEQAD ❍ ❍ 92 H LDEQAD ❍ ❍ 8E H GDEQAD ❍ ❍ 91 H MDEQBC ❍ ❍ 8C H LDEQBC ❍ ❍ 8F H GDEQBC ❍ ❍ 8A H HALSG ❍ ❍ 11 H LALSG ❍ ❍ 11 H GALSG ❍ ❍ 11 H HALSOFS ❍ ❍ FC H LALSOFS ❍ ❍ 00 H GALSOFS ❍ ❍ 00 H

● Adjust setting (ADJSET)

Item on display Set value

COK ❍ ❍ 58 H FAT ❍ ❍ C0 H TAT ❍ ❍ 3E H CAT ❍ ❍ 40 H FAB ❍ ❍ 5C H STR ❍ ❍ 0B H SFS ❍ ❍ 0D H STC ❍ ❍ 0D H

MDX-596

■ SPECIAL TEST MODE

● How to set to the special test mode

Press the POWER button while pressing the SET/ENTER button and the STOP button. Then all the indicators will light up.

● Operation procedure

Every time the SET/ENTER button is pressed, lighting of indicators and items on the display change as follows.

1) All indicators light up.

2) All indicators turn off.

3) Segments not sharing the border light up.

4) Above segments turn off and other segments light up.

5) The date when the software was entered appears on the display.

6) The version of the micro processor appears on the display. [ CPU Ver:TP03 ]

7) The time of auto-marking appears on the display. [ AM Time :C8h ]

8) The analog level of auto-marking appears on the display. [ AM Lv1_A:24h ]

9) The digital level of auto-marking appears on the display. [ AM Lv1_D:1Ah ]

10) The parameter of the bit distribution during recording on the display. [ Rec Bit0:C0h ]

11) The parameter of the bit distribution during recording on the display. [ Rec Bit1:FEh ]

12) Write/read check for EEPROM appears on the display [ EE W/R Check ] When the INPUT button is pressed at this point, whether the micro processor executed data write/read function into EEPROM or not is checked. If [OK] appears on the display and the pin 6 of IC6 is at “H”, the check result is satisfactory. [NG] is displayed when there is an error while writing or reading the data. In such a case, check EEPROM (IC7).

● How to cancel the special mode

Press the STOP button, and the mode will change from the special test mode to the factory preset mode and the data in RAM will be cleared. Note : Turning off the power will cancel the special test mode but will not clear the data in RAM (ie., user settings are maintained).

MDX-596

Data to write in EEPROM (IC7) Initial settings

INPUT mode ANALOG REPEAT mode OFF RANDOM mode OFF PROGRAM mode OFF REC mode (STEREO/MONO) STEREO AUTO MARK/MANUAL AUTO (“MANUAL” does not light up.) DISPLAY mode DISC TITLE

+ 41 hidden pages

Yamaha MDX-596 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

■ TO SERVICE PERSONNEL

■ REAR PANELS

■ SPECIFICATIONS

■ INTERNAL VIEW

■ DISASSEMBLY PROCEDURES

■ ADJUSTMENT & TEST MODE

■ SPECIAL TEST MODE