LG HCD MD595 Service Manual

HCD-MD595

CD player section

System Compact disc and digital audio

system

Laser Semiconductor laser (λ=800 nm)

Emission duration: continuous

Laser output Max. 44.6 µW*

* This output is the value measured at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block with a 7 mm aperture.

Frequency response 2 Hz – 20 kHz

MD deck section

System MiniDisc digital audio system Laser Semiconductor laser (λ=780 nm)

Emission duration: continuous

Laser output Max. 44.6 µW*

* This output is the value measured at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block with a

7 mm aperture. Sampling frequency 44.1 kHz Frequency response 5 Hz – 20 kHz

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range Tourist model: 76.0 – 108.0 MHz

(50 kHz step) European model: 87.5 – 108.0 MHz

(50 kHz step) Other models: 87.5 – 108.0 MHz

(100 kHz step) Antenna FM lead antenna Antenna terminals 75 ohms unbalanced Intermediate frequency 10.7 MHz

Amplifier section

For the U.S. and Canadian models AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC DISTORTION:

With 6 ohm loads, both channels driven, from 120 – 10,000 Hz; rated 20 watts per channel minimum RMS power, with no more than 0.9% total harmonic distortion from 250 milliwatts to rated output.

Continuous RMS power output:

25 + 25 watts (6 ohms at 1 kHz, 10% THD, 120 V) (Reference)

European model:

DIN power output (Rated):25 + 25 watts (6 ohms at 1 kHz,

DIN, 230 V)

Continuous RMS power output (Reference):

30 + 30 watts (6 ohms at 1 kHz, 10% THD, 230 V)

Music power output (Reference):

50 + 50 watts

Other models:

DIN power output (Rated):20 + 20 watts (6 ohms at 1 kHz,

DIN, 240 V) 18 + 18 watts (6 ohms at 1 kHz,

DIN, 220 V)

Continuous RMS power output (Reference):

25 + 25 watts (6 ohms at 1 kHz, 10% THD, 240 V) 23 + 23 watts (6 ohms at 1 kHz, 10% THD, 220 V)

Peak Music Power Output:400 watts

Inputs TAPE IN (phono jacks): voltage 250 mV, impedance

47 kilohms

DIGITAL OPTICAL IN (Supported sampling frequencies: 32 kHz, 44.1 kHz and 48 kHz)

ANALOG IN (stereo minijack):

voltage 250 mV, impedance 47 kilohms

Outputs TAPE OUT (phono jacks):voltage 250 mV, impedance

1 kilohm

PHONES (stereo minijack):

accepts headphones of 8 ohms or more.

SPEAKER:

accepts impedance of 6 to 16 ohms.

SERVICE MANUAL

Ver. 1.1 2005.03

HCD-MD595 is the Amplifier, CD player, MD Deck and Tuner section in DHC-MD595.

US and foreign patents licensed from Dolby Laboratories.

CD Section

MD Section

US Model

Canadian Model

AEP Model

UK Model

E Model

Austr alian Model

Chinese Model

Tourist Model

Model Name Using Similar Mechanism NEW CD Mechanism Type CDM55A-21BD53 Base Unit Name BU-21BD53 Optical Pick-up Name OP Assy (A-MAX. 2) Model Name Using Similar Mechanism NEW MD Mechanism Type MDM-7X2A Optical Pick-up Name KMS-262A/J1N

9-929-258-12

2005C05-1

Sony Corporation

Audio Group Published by Sony Engineering Corporation

SPECIFICATIONS

COMPACT DISC DECK RECEIVER

– Continued on next page –

AM tuner section

Tuning range European model: 531 – 1,602 kHz

Other models: 531 – 1,602 kHz

Antenna AM loop antenna

Intermediate frequency 450 kHz

(with the interval set at 9 kHz)

(with the interval set at 9 kHz) 530 – 1,710 kHz (with the interval set at 10 kHz)

External antenna terminals

General

Power requirements U.S.A. and Canadian models:

Australian model: 220 – 240 V AC, 50/60 Hz Chinese model: 220 V AC, 50/60 Hz European model: 230 V AC, 50/60 Hz Other models: 110 – 120 V or 220 – 240 V

Power consumption U.S.A. and Canadian models:

Other models: 70 watts during normal operation

120 V AC, 60 Hz

AC, 50/60 Hz

60 watts during normal operation

Dimensions (w/h/d) incl. projecting parts and controls

Mass

Approx. 215 × 147 × 326 mm Approx. 5.0 kg

Design and specifications are subject to change without notice.

SELF-DIAGNOSIS FUNCTION

The self-diagnosis function consists of error codes for customers, which are displayed automatically when errors occur, and error codes, which show the error history in the test mode during servicing. For details on how to view error codes for the customer, refer to the following box in the instruction manual. For details on how to check error codes during servicing, refer to the following “Procedure for using the Self-Diagnosis Function (Error History Display Mode)”.

Self-diagnosis Display

This system has a Self-diagnosis display function to let you know if there is a system malfunction. The display shows a code made up of three or five letters and a message alternately to show you the problem. To solve the problem refer to the following list. If any problem persists, consult your nearest Sony dealer.

C11/Protected

The MD is protected against erasure. cRemove the MD and slide the tab to close the

slot.

C12/Cannot Copy

You tried to record a CD or MD with a format that the system does not support, such as a CDROM.

cRemove the disc and turn off the system once,

then turn it on again.

C13/REC Error

Recording could not be performed properly. cMove the system to a stable place, and start

recording over from the beginning.

The MD is dirty or scratched, or the MD does not meet the standards.

cReplace the MD and start recording over from

the beginning.

C13/Read Error

The MD deck cannot read the disc information properly. cRemove the MD once, then insert it again.

C14/Toc Error

The MD deck cannot read the disc information properly.

cReplace the MD. cErase all the recorded contents of the MD

using the All Erase function.

C41/Cannot Copy

The sound source is a copy of a commercially available music software, or you tried to record a CD-R (Recordable CD). cThe Serial Copy Management System

prevents making a digital copy. You cannot record a CD-R.

C71/Check OPT-IN

This appears momentarily because of the signal of the digital broadcast during recording.

cThere is no affect on the recorded contents. No component is connected to the DIGITAL

OPTICAL IN jack, or a digital component is not connected properly. cConnect a digital component to the DIGITAL

OPTICAL IN jack properly using a digital connecting cable (not supplied).

The connected digital component is not turned on.

cSee the operating instructions supplied with

the connected component and confirm

whether the component is turned on. The digital connecting cable connected to the DIGITAL OPTICAL IN jack is pulled out, or the connected digital component is turned off during digital recording. cConnect the cable, or turn on the digital

component.

E0001/MEMORY NG

There is an error in the internal data that the system needs in order to operate.

cConsult your nearest Sony dealer.

E0101/LASER NG

There is a problem with the optical pickup. cThe optical pickup may have failed. Consult

your nearest Sony dealer.

MD SECTION

PROCEDURE FOR USING THE SELF-DIAGNOSIS FUNCTION (ERROR HISTORY DISPLAY MODE)

Note 1: About “R”

As this unit has only a few buttons, some operations require the use of remote commander (RM-S5EN/provided with unit: 1-476-086-21) buttons. These operations are indicated as “R” in this manual. Example: MENU/NO “R” ...Press the [MENU/NO] button of the remote commander.

Note 2: Incorrect operations may be performed if the MD test mode is not entered properly.

In this case, press the I/1 button to turn the power off, and retry to enter the MD test mode.

Note 3: Perform the self-diagnosis function in the “error history display mode” in the MD test mode. The following describes the least required

procedure. Be careful not to enter other modes by mistake. If you set other modes accidentally, press the MENU/NO “R” button to exit the mode.

Procedure:

1. Press the I/1 button to turn the power on.

2. Press the [FUNCTION] button to set the MD function.

3. Press three buttons of M > , [PLAY MODE], and [MD ] simultaneously to enter the MD test mode and display “[Check]”.

4. Press the . m “R ” or M > “R” button to display “[Service]”.

5. Press the ENTER/YES “R” button to display “AUTO CHECK”, and press the M > “R” button to display “Err Display”.

6. Press the ENTER/YES “R” button to enter the error history mode and display “op rec tm”.

7. Select the contents to be displayed or executed using the . m “R” or M > “R” button.

8. Press the [CD-MD SYNC NORMAL] b utton to light up “IT” indicator , then press the [REC MODE] button will display or execute the contents selected.

9. Press the [REC MODE] button another time returns to step 7.

10. Press the MENU/NO “R” button displays “Err Display” and release the error history mode.

11. To release the MD test mode, press the [REPEAT] button to display “Initialize” and release the MD test mode.

ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTS

Display Details of History

op rec tm Displays the recording time.

Displayed as “rssssssh”. The displayed time is the total time the laser is set to the high power state. This is about 1/4 of the actual recording time. The time is displayed in decimal digits from 0h.

op play tm Displays the playback time.

Displayed as “p ssmin”. The displayed time is the total of the actual play time.

spdl rp tm Displays the spindle motor running time.

Displayed as “rssssssh”. The time is displayed in decimal digits from 0h.

retry err Displays the total number of retries during recording and number of retry errors during play.

Displayed as “r ss p ss”. “r” indicates the retries during recording while “p” indicates the retry errors during play. The number of retries and retry errors are displayed in hexadecimal digits from 00 to FF.

total err Displays the total number of errors.

Displayed as “total ss”. The number of errors is displayed in hexadecimal digits from 00 to FF.

err history Displays the 10 latest errors.

Displayed as “0s ErrCd @@”. s indicates the history number. The smaller the number, the more recent is the error. (00 is the latest) @@ indicates the error code. Refer to the following table for the details. The error history can be switched by pressing the

M > “R” button.

retry adrs Display the 5 latest retry address.

Display as “ss ADRS@@@@”. ss indicates the history number. The smaller the number, the more recent is the error. (00 is the latest) @@@@ indicates the cluster of retry address. The number of retry address can be switched by pressing the . m “R” or M > “R” button.

er refresh Mode to clear the error history and retry address history.

Procedure:

1) Press the

2) The display will change to “er refresh?”, and then press the ENTER/YES “R” button. The operation is over if “Complete!” is displayed. After this mode was executed, check the following:

• The data have been cleared.

• Perform the recording and playing to check that the mechanism operates normally.

tm refresh Mode to clear cumulative time of “op rec tm” and “op play tm”.

Procedure:

1) Press the

2) The display will change to “tm refresh?”, and then press the ENTER/YES “R” button. The operation is over if “Complete!” is displayed.

op change Mode to c lear cumulative time of “op rec tm” and “op play tm”.

These historical data are used to determine the timing when the optical pick-up is to be replaced. When the optical pick-up was replaced, perform this operation to clear historical data.

Procedure:

1) Press the

2) The display will change to “op change?”, and then press the ENTER/YES “R” button. The operation is over if “Complete!” is displayed.

spdl change Mode to clear cumulative time of “spdl rp tm”.

This historical data is used to determine the timing when the spindle motor is to be replaced. When the spindle motor was replaced, perform this operation to clear historical data.

Procedure:

1) Press the

2) The display will change to “spdl change?”, and then press the ENTER/YES “R” button. The operation is over if “Complete!” is displayed.

[REC MODE] button.

. m “R” or

Table of Error Codes

Error Code Details of Error

10 Loading failed 12 Loading switch combination is illegal 20 Head of PTOC could not be read within the

specified time

21 Head of PTOC could be read but its content is

erroneous

22 Access to UTOC could not be made within the

specified time

23 UTOC could be not read within the specified

time 24 Content of UTOC is erroneous 30 Playing could not start 31 Content of sector is erroneous 40 Cause of retry occurred during normal recording 41 D-RAM overflowed and retry was executed 42 Retry was executed during the writing to TOC 43 S.F editing was interrupted by retry 50 Address could not be read except in access

processing 51 Focusing failed and it is out of control 60 Unlock retry

CD SECTION

PROCEDURE FOR USING THE SELF-DIAGNOSIS FUNCTION (ERROR HISTORY DISPLAY MODE)

1. To Enter The CD Test Mode

Procedure:

1. Press the I/1 button to turn the power on.

2. Press the [FUNCTION] button to set the CD function.

3. Press three buttons of M > , [CD ], and [TUNER/BAND] simultaneously.

4. The set enter the CD test mode (menu) and displays “dvt ERR CODE”.

4. Display of No Disc Error History

Procedure:

1. In the CD test mode menu, press the M > button to display “dvt ECODE BU”.

2. Press the [CD ] button to display as bellow.

Display

E**D********

(a)

(c)

(b) (d)

(e)

Note: If the triple button pressing failed to activate the CD test mode,

press the [CD ] button, and the [TUNER/BAND] button in this order while pressing the M > button. Also, release the

[TUNER/BAND], [CD ], and M > buttons in this order, when

releasing the buttons. If the consequence was diaplayed except “dvt ERR CODE”, press the . m button to display “dvt ERR CODE”.

2. Display of Error Number

Procedure:

1. Press the [CD ] button to display as bellow.

Display

Emc=**Edc=**

(a)

(a) Number of mechanical error. (b) Number of no disc error that occurred after chucking.

2. Press the

x (CD) button and return to CD test mode menu

(“dvt ERR CODE” is displayed).

3. Display of Mechanical Error History

Procedure:

1. In the CD test mode menu, press the M > button to display “dvt ECODE MEC”.

2. Press the [CD ] button to display as bellow.

Display

(b)

E**M********00

(a) The number of no disc error.

Latest one “00” to last ten “09” (Press the . m or M > button to change the error number)

(b) 01: Focus error

02: GFS error 03: Set up error 04: Focus error (not used in servicing)

02: No disc error (Chucking retry to completion)

(d) The status, when determined no disc error.

2x: During setting up 3x: During reading TOC 4x: During accessing 5x: During playback 6x: During pause 7x: During manual search (during playback) 8x: During manual search (during pause)

3. Press the

x (CD) button and return to CD test mode menu

(“dvt ECODE BU” is displayed).

4. To Erase The Error History

When returning the unit to the customer after completing repairs, perform this to erase the past error history.

Procedure:

1. In the CD test mode menu, press the M > button to display “dvt ECNT0 MEC”. (When erase the mechanical error) Or one more press the M > button to display “dvt ECNT0 BU”. (When erase the no disc error)

2. Press the [CD ] button to erase the error history (mechanical

error or no disc error) and display as bellow.

Display

(a)

(c)

(b) (d)

(e)

(a) The number of mechanical error.

Latest one “00” to last ten “09” (Press the . m or M > button to change the error number)

(b) FF: Mechanical error, when normal operation.

Other display: Mechanical error, between mechanical initialize.

(c), (d), (e): Not used in servicing.

3. Press the x (CD) button and return to CD test mode menu (“dvt ECODE MEC” is displayed).

Emc=00Edc=00

5. To Release The CD Test Mode

Press the I/1 button to turn the power off.

SELF-DIAGNOSIS FUNCTION..................................... 2

1. SERVICING NOTES ............................................... 8

2. GENERAL ................................................................... 19

3. DISASSEMBLY ......................................................... 23

4. TEST MODE ............................................................... 32

5. ELECTRICAL ADJUSTMENTS

MD Section ..................................................................... 37

CD Section ...................................................................... 48

6. DIAGRAMS

6-1. Block Diagram – MD SERVO Section – ....................... 51

6-2. Block Diagram – D/A, A/D CONVERTER Section –... 52

6-3. Block Diagram – MAIN Section .................................... 53

6-4. Block Diagram

– DISPLAY, POWER SUPPLY Section –..................... 54

6-5. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 55

6-6. Printed Wiring Board – BD (CD) Board – ..................... 56

6-7. Schematic Diagram – BD (CD) Board –........................ 57

6-8. Schematic Diagram – BD (MD) Board (1/2) – .............. 58

6-9. Schematic Diagram – BD (MD) Board (2/2) – .............. 59

6-10. Printed Wiring Board – BD (MD) Board – .................... 60

6-11. Schematic Diag ram – MD DIGITAL Board (1/3) – ...... 61

6-12. Schematic Diag ram – MD DIGITAL Board (2/3) – ...... 62

6-13. Schematic Diag ram – MD DIGITAL Board (3/3) – ...... 63

6-14. Printed Wiring Board

– MD DIGITAL Board (Component Side) – ................. 64

6-15. Printed Wiring Boards

– MD DIGITAL (Conductor Side)/

LOADING Boards – ....................................................... 65

6-16. Schematic Diagram

– MAIN (1/2)/RDS IC Boards –..................................... 66

6-17. Schematic Diagram – MAIN Board (2/2) – .................. 67

6-18. Printed Wiring Boards – MAIN/RDS IC Boards – ...... 68

6-19. Printed Wiring Board – SP Board – .............................. 69

6-20. Schematic Diagram – SP Board – .................................. 69

6-21. Printed Wiring Board – AMP Board – .......................... 70

6-22. Schematic Diag ram – AMP Board – ............................. 71

6-23. Printed Wiring Boards – PANEL/BL Boards – ............. 72

6-24. Schematic Diag ram – PANEL/BL Boards – ................ 73

6-25. Printed Wiring Board – POWER Board – ..................... 74

6-26. Schematic Diag ram – POWER Board – ........................ 75

6-27. IC Pin Function Description ........................................... 81

7. EXPLODED VIEWS ................................................ 93

8. ELECTRICAL PARTS LIST ............................... 99

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

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.

SAFETY-RELATED COMPONENT WARNING!!

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

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS P AR 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.

SAFETY CHECK-OUT

After correcting the original service problem, perform the following safety check before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.

LEAKAGE TEST

The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes.). Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA WT -540A. Follo w the manufacturers’ instructions to use these instruments.

2. A battery-operated A C milliammeter. The Data Precision 245 digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate lowvoltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A)

To Exposed Metal Parts on Set

1.5 k

0.15 µF

Fig. A. Using an AC voltmeter to check AC leakage.

Ω

Earth Ground

voltmete (0.75 V)

CAUTION

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

The following caution label is located inside the unit.

CAUTION

Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer’s instructions.

ADVARSEL!

Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering.

Udskiftning må kun ske med batteri

af samme fabrikat og type.

Levér det brugte batteri tilbage til leverandøren.

ADVARSEL

Eksplosjonsfare ved feilaktig skifte av batteri.

Benytt samme batteritype eller en tilsvarende type

anbefalt av apparatfabrikanten.

Brukte batterier kasseres i henhold til fabrikantens

instruksjoner.

VARNING

Explosionsfara vid felaktigt batteribyte. Använd samma batterityp eller en likvärdig typ som rekommenderas av apparattillverkaren. Kassera använt batteri enligt gällande föreskrifter.

VAROITUS

Paristo voi räjähtää, jos se on virheellisesti asennettu. V aihda paristo ainoastaan laitev almistajan suosittelemaan tyyppiin. Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.

This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.

Laser component in this product is capable of emitting radiation exceeding the limit for Class 1.

CAUTION

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

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.

For CD

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objectiv e lens.

LASER DIODE AND FOCUS SEARCH OPERATION CHECK

Carry out the “S curve check” in “CD section adjustment” and check that the S curve waveforms is output three times.

For MD

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.

MODEL IDENTIFICATION

— Back panel —

PART No.

Model Part No.

AEP, UK and North European models

US and Canadian models 4-228-095-2 Australian model 4-228-095-5 Malaysia, Singapore, Hong Kong

and Tour ist models

4-228-095-1

4-228-111-3

[]

[] []

[]

CLEANING OBJECTIVE LENS OF OPTICAL PICK-UP

• In cleaning the objective lens of optical pick-up, be sure the following below.

1. In cleaning the lens, do not apply an excessive force.

As the optical pick-up is vulnerable, application of excessive force could damage the lens holder.

2. In cleaning, do not use a cleaner other than exclusive cleaning

liquid (KK-91 or isopropyl alcohol).

3. Wipe the objective lens spirally from center toward outside.

(See Figure A)

(Figure A)

4. Eject the disk, if loaded.

5. Disconnect the power cord from the socket to shut off the power

supply.

6. When cleaning the objective lens of optical pick-up in CD,

refer to “HOLDER (BU) ASS’Y” on page 29 for removing HOLDER (BU) ASS’Y.

SERVICE POSITION

MD mechanism deck section (MDM-7X2A)

CN103

BD (MD) board

CD mechanism deck section (CDM55A-21BD53)

Connect extension jig (J-2501-198-A) to the BD (MD) board (CN103) and MD DIGITAL board (CN1004).

Connect extension jig (J-2501-100-A) to the BD (MD) board (CN102) and MD DIGITAL board (CN1003).

CN1004

CN1003

CN101

BD (CD) board

CN1005

CN1002

MD DIGITAL board

Connect extension jig (J-2501-075-A) to the BD (CD) board (CN101) and MD DIGITAL board (CN1002).

CN1005

Pin 2 (GND)

Pin 3 (OUTSW)

CN102

harness

• In checking the MD mechanism deck section (MDM-7X2A), prepare two extension jigs (Part No. J-2501-100-A: 1.00 mm 27 core and Part No. J-2501-198-A: 1.00 mm 17 core).

• In checking the CD mechanism deck section (CDM55A-21BD53), prepare extension jig (Part No. J-2501-075-A: 1.00 mm 21 core.)

Note on Checking CD Mechanism Deck Section

In performing the operation check with the CD mechanism deck section removed from the main unit, the CD disc loading will be disabled if the connector cable between MD DIGITAL board (CN1005) and LOADING board (CN151) is disconnected. Accordingly, make preparation through the following steps.

1. Insert the CD disc for test with the set assembled.

2. Unplug the AC power cord to turn the power off, and remove the CD mechanism deck section. (Disconnect the connector cable

between MD DIGITAL board (CN1005) and LOADING board (CN151), and also the connector cable between MD DIGITAL board (CN1002) and BD (CD) board (CN101))

3. Connect the CN1005 pin 3 (OUTSW) and pin 2 (GND) on the MD DIGITAL board with a lead wire.

4. Connect the connectors between MD DIGITAL board (CN1002) and BD (CD) board (CN101) with the extension tool (part No.: J-

2501-075-A).

Note 1:Under this condition, the CD can be played but the disc loading operation is disabled. Note 2:After checking, disconnect the lead wire connected in step 3.

MC COLD RESET

• The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the customer.

Procedure:

1. Press the I/1 button to turn the power on.

2. Press three buttons of . m , [REC MODE], and x (CD) simultaneously.

3. The set is reset, and displays “COLD RESET”, then becomes standby status.

AMP TEST

Procedure:

1. Press the I/1 button to turn the power on.

2. Press three buttons of M > , [REC MODE], and N X (MD) simultaneously.

3. Each buttons are pressed, it changes display as follows.

Button Display

x (CD) 7[TESTMIN]

REC MODE 8[TESTMID]

x (MD) 9[TESTMAX]

[VOLUME] knob is turned, it changes display as follows.

Turn Direction Display

clockwise VOLUME MIN center VOLUME 21 counterclockwise VOLUME MAX

5. To release from this mode, press the I/1 button to turn the power off and cold reset.

VERSION DISPLAY

Procedure:

1. Press the I/1 button to turn the power on.

2. Press three buttons of M > , [REC MODE], and [TUNER/BAND] simultaneously.

3. Enter the version display mode and display STR version.

4. Each time the x (MD) button is pressed, it changes display STR version → CD version → MD version → STR version → ...

5. To release from this mode, press the I/1 button to turn the power off.

LCD AND LED TEST

Procedure:

1. Press the I/1 button to turn the power on.

2. Press three buttons of M > , [REC MODE], and N X (CD) simultaneously.

3. Liquid crystal display and LEDs are all turned on.

4. Each time the x (MD) button is pressed, it changes display all turned on → all turned off → pattern 1 → pattern 2 → all turned on → ...

5. Each time the x (CD) button is pressed, it changes LED indication all turned on → all turned off → “I/1” → “REC” → “N” (CD)

→ “X” (CD) → “N” (MD) → “X” (MD) → all turned on → ...

6. To release from this mode, press the I/1 button to turn the power off.

KEY TEST

Procedure:

1. Press the I/1 button to turn the power on.

2. Press three buttons of . m , [CD ], and [MD ] simultaneously.

3. Enter the key test mode and display “KEY00 VOL0”.

4. Each time a button is pressed, “KEY” value increases. However, once a button is pressed, it is no longer taken into account.

“VOL” value increases like 0, 1, 2 ... if tur n the [VOLUME] knob clockwise, or it decreases like 9, 8, 7 ... if tur n the [VOLUME] knob counterclockwise.

5. To release from this mode, press three buttons in the same manner as step 2 , or disconnect the power cord.

MD SECTION

JIG FOR CHECKING BD (MD) BOARD WAVEFORM

The special jig (J-2501-196-A) is useful for checking the waveform of the BD (MD) board. T he names of terminals and the checking items to be performed are shown as follows.

GND : Ground I+3V : For measuring IOP (Check the deterioration of the optical pick-up laser) IOP : For measuring IOP (Check the deterioration of the optical pick-up laser) TE : Tracking error signal (Traverse adjustment) VC : Reference level for checking the signal RF : RF signal (Check jitter) FE : Focus error signal

I+3V

GND

IOP

I+3V

IOP

GND

FE VC RF

CN105

I+3V IOP

GND

TE FE VC RF

for

MDM-7X2

Note 1:About “R”

As this unit has only a few buttons, some operations require the use of remote commander (RM-S5EN/provided with unit: 1-476-086-21) buttons. These operations are indicated as “R” in this manual. Example: MENU/NO “R” ... Press the [MENU/NO] button of the remote commander.

Note 2:Incorrect opera tions may be performed if the MD test mode is not entered properly.

In this case, press the I/1 button to turn the power off, and retry to enter the MD test mode.

IOP DATA RECORDING AND DISPLAY WHEN OPTICAL PICK-UP AND NON-VOLATILE MEMOR Y (IC195 OF BD (MD) BOARD) ARE REPLACED

The IOP value labeled on the optical pick-up can be recorded in the non-volatile memory. By recording the value, it will eliminate the need to look at the value on the label of the optical pick-up. When replacing the optical pick-up or non-volatile memory (IC195 of BD (MD) board), record the IOP value on the optical pick-up according to the following procedure.

Record Procedure:

1. Press the I/1 button to turn the power on.

2. Press the [FUNCTION] button to set the MD function.

3. Press three buttons of M > , [PLAY MODE], and [MD ] simultaneously to enter the MD test mode and display “[Check]”.

4. Press the . m “R ” or M > “R” button to display “[Service]”.

5. Press the ENTER/YES “R” button to display “AUTO CHECK”, and press the M > “R” button to display “Iop Write”.

6. Press the ENTER/YES “R” button.

7. The display becomes “Ref= @@@.@” (@ is an arbitrary number) and the numbers which can be changed will blink.

8. Input the IOP value written on the optical pick-up. To select the number : Press the . m “R” or M > “R” button. To select the digit : Press the [REC MODE] button.

9. When the ENTER/YES “R” button is pressed, the display becomes “Measu=@@@.@” (@ is an arbitrary number).

10. As the adjustment results are recorded for the step 9 value. Leave it as it is and press the ENTER/YES “R” button.

11. “Complete!” will be displayed momentarily. The value will be recorded in the non-volatile memory and the display will become “Iop Write”.

12. Press the [REPEAT] button to complete. “Initialize” will be displayed and release the MD test mode.

Display Precedure:

1. Press the I/1 button to turn the power on.

2. Press the [FUNCTION] button to set the MD function.

3. Press three buttons of M > , [PLAY MODE], and [MD ] simultaneously to enter the MD test mode and display “Check”.

4. Press the . m “R” or M > “R” button to display “Service”.

5. Press the ENTER/YES “R” button to display “AUTO CHECK”, and press the M > “R” button to display “Iop Read”.

6. Press the ENTER/YES “R” button.

7. “@@.@/##.#” is displayed and the recorded contents are displayed. @@.@ : Indicates the Iop value labeled on the pick-up. ##.# : Indicates the Iop value after adjustment.

8. Press the [REPEAT] button to complete. “Initialize” will be displayed and release the MD test mode.

WHEN MEMORY NG IS DISPLAYED

If the nonvolatile memory data is abnormal, “E001 MEMORY NG” will be displayed so that the MD deck does not continue operations. In this case, set the test mode promptly and perform the following procedure.

Procedure:

1. Enter the MD test mode (refer to page 32).

2. Normally a message for selecting the test mode will be displayed. However if the nonvolatile memory is a bnormal, the follo wing will be

displayed “INIT EEP?”.

3. Press the x (MD) and [MD ] buttons simultaneously.

4. Press the . m “R” or M > “R” button to display “MDM-7X2A”.

5. Press the ENTER/YES “R” button. If the nonvolatile memory is successfully overwritten, the normal MD test mode will be set and a

message to select the MD test mode will be displayed.

CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS IN MD

Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in “5 Electrical Adjustments”.

Laser power check (6-2 : See page 40)

Traverse check (6-6 : See page 41)

Focus bias check (6-7 : See page 42)

C PLAY check (6-8 : See page 42)

Self-recording/playback check (6-9 : See page 42)

Temperature compensation offset check (6-1 : See page 40)

Criteria for Determination (Unsatisfactory if specified value is not satisfied)

• 0.9 mW power Specified value : 0.84 to 0.92 mW

• 7.0 mW power Specified value : 6.8 to 7.2 mW

Iop (at 8.4mW)

• Labeled on the optical pick-up Iop value ± 10mA

• Traverse waveform Specified value : Below 10% offset

• Error rate check Specified value : For points A and B C1 error : About 200 AD error : below 2 For point C C1 error: 20 AD error: below 2

• Error rate check Specified value: a. When using test disc (MDW-74/GA-1)

C1 error : Below 20 AD error : 00

b. When using check disc (TDYS-1)

C1 error : Below 20

• CPLAY error rate check Specified value: C1 error : Below 20 AD error : Below 2

• Unsatisfactory if displayed as T=@@ (##) [NG]” NG (@@, ## are both arbitrary numbers)

• Clean the optical pick-up

• Adjust again

• Replace the optical pick-up

If always unsatisfactory:

• Replace the overwrite head

• Check for disconnection of the circuits around the overwrite head

If occasionally unsatisfactory:

• Check if the overwrite head is distorted

• Check the mechanism around the sled

• Check for disconnection of the circuits around D101 (BD (MD) board)

• Check the signals around IC101, IC151, CN102, CN103 (BD (MD) board)

Measure if unsatisfactory

Note:

The criteria for determination above is intended merely to determine if satisfactory or not, and does not serve as the specified value for adjustments. When performing adjustments, use the specified values for adjustments.

RETRY CAUSE DISPLAY MODE IN MD

• In this test mode, the causes for retry of the unit during recording can be displayed on the liquid crystal display. During playback, the “track mode” for obtaining track information will be set. This is useful for locating the faulty part of the unit.

• The following will be displayed : During recording and stop: Retry cause, number of retries, and number of retry errors. During playback : Information such as type of disc played, part played, copyright. These are displayed in hexadecimal.

Precedure:

1. Load a recordable disc whose contents can be erased into the unit.

2. Press the MENU/NO “R” button. When “Edit Menu” is displayed on the liquid crystal display, press the . m “R” or

M > “R” button to display “All Erase?”.

3. Press the ENTER/YES “R” button.

4. When “All Erase??” is displayed on the liquid crystal display, the music calendar number blinks.

5. Press the ENTER/YES “R” button to display “Complete!”.

6. Press the [REC/REC IT] button to start recording. Then press the N X (MD) button and start recording. If recording cannot be

performed, press the [FUNCTION] button and set a different function.

7. Press three buttons of . m , [PLAY MODE] and N X (MD) simultaneously to enter the retry cause display mode.

8. To check the “track mode”, press the N X (MD) button to start playback.

9. To release this mode, press the I/1 button to turn the power off. When “TOC” goes off, disconnect the power plug from the outlet.

If the test mode cannot be released, refer to “MC COLD RESET” on page 10.

Fig. 1 Reading the Test Mode Display

(During recording and stop)

RTs@@c##e

Liquid crystal display

@@ : Cause of retry ## : Number of retries

: Number of retry errors

Reading the Retry Cause Display

Higher Bits Lower Bits

Hexadecimal

Bit

Binary

84218421

b7 b6 b5 b4 b3 b2 b1 b0

00000001 00000010

00000100 00001000 00010000 00100000 01000000 10000000

Hexa-

decimal

04 08 10 20 40 80

Cause of Retry

shock

ader5 Discontinuous address

DIN unlock FCS incorrect IVR rec error CLV unlock Access fault

Fig. 2 Reading the Test Mode Display

(During playback)

@@ ###

Liquid crystal display

@@ : Parts No. (name of area named on TOC) ## : Cluster

: Sector

$$ : Track mode (Track information such as copy-

right information of each part)

When track jump (shock) is detected When ADER was counted more than five times

continuously When ADIP address is not continuous When DIN unlock is detected When not in focus When ABCD signal le v el e xceeds the specified range When CLV is unlocked When access operation is not performed normally



Address

 

Occurring conditions

Reading the Display:

Convert the hexadecimal display into binary display. If more than two causes, they will be added.

Example

When 42 is displayed: Higher bit: 4 = 0100 t b6 Lower bit : 2 = 0010 t b1 In this case, the retry cause is combined of “CLV unlock” and “ader5”.

When A2 is displayed: Higher bit: A = 1010 t b7 + b5 Lower bit : 2 = 0010 t b1 The retry cause in this case is combined of “Access fault”, “IVR rec error”, and “ader5”.

Reading the Retry Cause Display

Higher Bits

Hexadecimal

Bit

Binary

Reading the Display:

Convert the hexadecimal display into binary display. If more than two causes, they will be added.

Example When 84 is displayed:

Higher bit: 8 = 1000 t b7 Lower bit : 4 = 0100 t b2 In this case, as b2 and b7 are 1 and others are 0, it can be determined that the retry cause is combined of “Emphasis OFF”, “Monaural”, “Original”, “Copyright”, and “Write allowed”.

Example When 07 is displayed:

Higher bit: 0 = 0000 t All 0 Lower bit : 7 = 0111 t b0 + b1 + b2 In this case, as b0, b1, and b2 are 1 and others are 0, it can be determined that the retry cause is combined of “Emphasis ON”, “Stereo”, “Original”, “Copyright”, and “Write prohibited”.

84218421

b7 b6 b5 b4 b3 b2 b1 b0

00000001 00000010 00000100 00001000 00010000 00100000 01000000 10000000

Lower Bits

Hexa-

decimal

01 02 04 08 10 20 40 80

When 0

Emphasis OFF Monaural

This is 2-bit display. Normally 01. 01:Normal audio. Others:Invalid

Audio (Normal) Original Copyright Write prohibited

Details

When 1

Emphasis ON Stereo

Invalid Digital copy No copyright Write allowed

Hexadecimal t Binary Conversion Table

Hexadecimal Binary Hexadecimal Binary

0 0000 8 1000 1 0001 9 1001 2 0010 A 1010 3 0011 B 1011 4 0100 C 1100 5 0101 D 1101 6 0110 E 1110 7 0111 F 1111

CD SECTION

CD AGING MODE

Procedure:

1. Press the

2. Press the

3. Press three buttons of M > , [CD ], and x (MD) simultaneously.

4. The set displays “AGING SEL=00”. Between it is displayed, press the [CD ] button to start CD aging mode.

5. The sequence during the CD aging mode is following as below.

I/1 button to turn the power on.

[FUNCTION] button to set the CD function, and press the [CD ] button to insert a disc.

Note: If the triple button pressing failed to activate the CD test mode, press the [CD ] button, and the x (MD) button in this order while pressing the

M > button. Also, release the x (MD), [CD ], and M > buttons in this order, when releasing the buttons.

If the consequence was that display “AGING SEL=01”, press the . m button to display “AGING SEL=00”. “AGING SEL=01” is not used in servicing.

CD aging mode sequence:

CD disk tray open

CD disc tray close

TOC read

Playback track 1

Playback last track

Display aging number

6. To release from this mode, press the

Note: Refer to “Error History Display Mode” (page 5) for display at an error occurred.

I/1 button to turn the power off.

CD-TEXT TEST DISC

This unit is able to display the test data (character information) written in the CD on its fluorescent indicator tube. The CD-TEXT TEST DISC (TGCS-313:4-989-366-01) is used for checking the display. To check, perform the following procedure.

Checking Method:

1. Press the I/1 button to turn the power on, set the disc to the disc table with the “test disc” label facing up, and chuck the disc.

2. Press the N X (CD) button and playback the disc.

3. The following will be displayed on the liquid crystal display. Display : 1kHz/0db/L&R

4. Pressing the . m or M > button, select the track. The text data of each track will be displayed.

For details of the displayed contents for each track, refer to “T ab le 1 : CD-TEXT TEST DISC TEXT Da ta Contents” and “Table 2 : CDTEXT TEST DISC Recorded Contents and Display”.

Restrictions in CD-TEXT Display

In this unit, some special characters will not be displayed properly. These will be displayed as a space or a character resembling it. For details, refer to “Table 2 : CD-TEXT DISC Recorded Contents and Display”.

Table 1 : CD-TEXT TEST DISC TEXT Data Contents (TRACKS No. 1 to 41:Normal Characters)

TRACK

No.

1 1kHz/0dB/L&R 22 1kHz/–90dB/L&R 2 20Hz/0dB/L&R 23 Infinity Zero w/o emphasis//L&R 3 40Hz/0dB/L&R 24 Infinity Zero with emphasis//L&R 4 100Hz/0dB/L&R 25 400Hz+7kHz(4:1)/0dB/L&R 5 200Hz/0dB/L&R 26 400Hz+7kHz(4:1)/–10dB/L&R 6 500Hz/0dB/L&R 27 19kHz+20kHz(1:1)/0dB/L&R 7 1kHz/0dB/L&R 28 19kHz+20kHz(1:1)/–10dB/L&R 8 5kHz/0dB/L&R 29 100Hz/0dB/L*

9 7kHz/0dB/L&R 30 1kHz/0dB/L* 10 10kHz/0dB/L&R 31 10kHz/0dB/L* 11 16kHz/0dB/L&R 32 20kHz/0dB/L* 12 18kHz/0dB/L&R 33 100Hz/0dB/R* 13 20kHz/0dB/L&R 34 1kHz/0dB/R* 14 1kHz/0dB/L&R 35 10kHz/0dB/R* 15 1kHz/–1dB/L&R 36 20kHz/0dB/R* 16 1kHz/–3dB/L&R 37 100Hz Squer Wave//L&R 17 1kHz/–6dB/L&R 38 1kHz Squer Wave//L&R 18 1kHz/–10dB/L&R 39 1kHz w/emphasis/–0.37dB/L&R 19 1kHz/–20dB/L&R 40 5kHz w/emphasis/–4.53dB/L&R 20 1kHz/–60dB/L&R 41 16kHz w/emphasis/–9.04dB/L&R 21 1kHz/–80dB/L&R

Displayed Contents

TRACK

No.

Displayed Contents

Note: The contents of Track No. 1 to 41 are the same as those of the current TEST DISC-their titles are displayed.

Table 2: CD-TEXT TEST DISC Recorded Contents and Display

(In this unit, some special characters cannot be displayed. This is not a fault)

TRACK

No.

42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67

Recorded contents

! ” # $%& ´ (21h to 27h)1kHz 0dB L&R

( ) + , – . / (28h to 2Fh)

01234567 (30h to 37h) 8 9 : ; < = > ? (38h to 3Fh)

@A B C D E F G (40h to 47h)

H I J K LMN O (48h to 4Fh) P Q R S T U VW (50h to 57h) X Y Z [ ¥ ] ^ _ (58h to 5Fh)

a b c d e f g (60h to 67h)

′

h i j k l m n o (68h to 6Fh) p q r s t u v w (70h to 77h) xyz{ I}

(78h to 7Fh)

i¢£¤¥ § (A0h to A7h) 8859-1

C ª

•±23

†

º ¿ (B8h to BFh)

–

µ ¶ • (B0h to B7h)

′

14123

(A8h to AFh)

АБВГДЕЖЗ (C0h to C7h)

ИЙКЛМНОП (C8h to CFh) D СТУФХЦ ШЩЪЫЬY

(D0h to D7h)

Я (D8h to DFh) абвгдежз (E0h to E7h) ийклмноп (E8h to FFh) ∂ стуфхц÷ (F0h to F7h) шщъыьy я (F8h to FFh)

No.66 No.67 to No.99

Display

T All the same T All the same T All the same T All the same T All the same T All the same T All the same T All the same T All the same T All the same T All the same T All the same

(A0h to A7h) 8859-1 (A8h to AFh) (B0h to B7h)

(B8h to BFh) AAAAAA C (C0h to C7h) E E E E I I I I (C8h to CFh) DNOOOOO (D0h to D7h)

O UU U U Y (D8h to DFh)

a a a a a a c (E0h to E7h) eeeeiiii (E8h to EFh) dnooooo (F0h to F7h) o u u u u y y (F8h to FFh)

T All the same T All the same

T All the same

LOCATION OF CONTROLS

• Front View

SECTION 2

GENERAL

qh qj

465

7 89

qsqa

qdqf

qkqlw;wa wswd

1 I/1 button and indicator 2 Remote sensor 3 MD disc slot 4 MD Z button 5 N X (MD) button and indicator 6 x (MD) button 7 CD disc tray 8 CD Z button 9 N X (CD) button and indicator 0 x (CD) button

qa ANALOG IN jack qs Liquid crystal display qd . m/M > (MD/CD), TUNING +/– buttons qf TUNER/BAND button qg VOLUME knob qh PHONES jack qj FUNCTION button qk PLAY MODE, TUNING MODE button ql REPEAT, STEREO/MONO button w; REC MODE button wa REC/REC IT button ws CD-MD SYNC NORMAL button wd CD-MD SYNC HIGH button

• Rear View

8796

• Liquid Crystal Display

1 PC LINK jack 2 TAPE IN/OUT jacks 3 SPEAKER IMPEDANCE USE 6-16 Ω terminals 4 Cooling fan 5 AM ANTENN A terminals 6 TAPE CONTROL jack 7 DIGITAL OPTICAL IN jack 8 FM 75 Ω jack 9 Power cord

7 8 90

1 CD/MD, Sound level indicators 2 TOC, TEXT, DBFB indicators 3 Tuner mode indicators 4 CD/MD play mode indicators 5, 6 Text information (clock, disc name, play time, etc.) indicator 7 S.F EDIT indicator 8 REC indicators 9 REC mode indicators 0 Timer indicators

Additional Information

Parts descriptions for

the remote

You can use the supplied remote to control the

system.

Note

You cannot perform the following operations with the

remote;

— Removing discs

— Selecting the recording mode

— CD-MD Synchro Recording

1 ? /1 (power) switch

2 CLOCK/TIMER SELECT button

Press to check timer settings, or to set the timer

on/off. (pages 56, 58)

CLOCK/TIMER SET button

Press to set the clock and timer functions. (pages

6, 55, 57)

continued

3 DISPLAY button

Press to switch the contents appearing on the

upper level of the display (preset equalizer name,

clock, disc name/track name/radio station name,

volume, etc.). (pages 9, 17, 23)

TIME button

Press to switch the contents appearing on the

lower level of the display (CD/MD play time

mode, etc.). (pages 9, 17, 23)

4 N (play) button

X (pause) button

x (stop) button

5 MD z REC button

6 PLAY MODE/TUNING MODE button

This functions as the PLAY MODE button when

playing a CD or MD. Press to select normal play,

Shuffle Play or Program Play.

This functions as the TUNING MODE button

when listening to the radio. Press to select

MANUAL, AUTO or PRESET tuning. (pages 15,

16, 21)

REPEAT button

Press to play a track or all the tracks repeatedly.

(pages 15, 20)

7 CURSORT/t, m/M buttons

Press to skip to the beginning of the next track or

the previous track when playing a CD or MD.

Press to tune the frequency when listening to the

radio.

These buttons are also used to set the clock, make

the Program Play setting, adjust the recording

level, and select characters to be entered, etc.

+/–, ./> (AMS: Automatic Music

Sensor) buttons

ENTER/YES button

Press to set the clock, Program Play and to label a

CD, MD and preset station, or to enter the

settings in “Edit Menu” or “Setup Menu”.

MENU/NO button

Press to label a CD, MD and preset station.

8 TIME MACHINE REC button

Parts descriptions for the

remote (continued)

Additional Information

qd PRESET EQ button

Press to select the type of the preset equalizer.

(page 52)

qf STEREO/MONO button

Press to switch between stereo and monaural

when receiving a stereo broadcast, etc.

qg SCROLL button

Press to display the disc title or track title

scrolling. (pages 18, 19, 23, 40)

qh CLEAR button

Press to cancel the selection. (pages 16, 19, 22,

39, 54)

qj TUNER/BAND button

Press to select the tuner for the sound source, or

to select the FM or AM band.

qk VOLUME +/– buttons

Press to adjust the volume.

ql DBFB button

Press to reinforce the bass sound. (page 52)

9 SLEEP button

Press to set Sleep Timer. (page 55)

0 NAME EDIT/SELECT button

Press to display the text input screen and to select

the type of characters to be input. (pages 18, 38,

53)

qa Letter/Number buttons

Press to select track numbers of a CD, MD, or

preset station.

Press to enter the corresponding letter or number

at the character input screen.

qs FUNCTION button

Press to switch the sound source.

Each time you press this button, the sound source

changes as follows;

TUNER

OPTICAL IN

TAPE

ANALOG IN

This section is extracted from instruction manual.

Step 2: Setting the time

You must set the time beforehand to use the timer

functions.

The clock is on a 24-hour system for the European

model, and a 12-hour system for other models.

The 12-hour system is used for illustration

purposes.

3,4,5

3,4

DISPLAY

TCURSOR

Turn on the system.

Press CLOCK/TIMER SET.

The time setting display appears, and the day

indication “SUN” flashes.

Press – or + to set the day, then press

ENTER/YES or CURSORt.

The hour indication flashes.

(For models using a 12-hour system, noon is

indicated as 0:00 PM, and midnight as

0:00 AM.)

Press – or + to set the hour, then press

ENTER/YES or CURSORt.

The minute indication flashes.

Press – or + to set the minute, then press

ENTER/YES.

The clock starts.

If you made a mistake

Press TCURSOR or CURSORt until the

indication you wish to change (day, hour, minute)

flashes, then change the setting.

Showing the time

In consideration of reducing standby power, this

system can select whether or not to display the

clock in standby mode. The system is set at the

factory to not display the clock when the power is

off (Power Saving Mode). To display the clock

even when the power is off, press DISPLAY or

TIME while the power is off. Press the button

again to turn the clock display off and activate the

Power Saving Mode.

While the system is on, the information that

appears at the top of the display changes as

follows each time you press DISPLAY.

Preset Equalizer name t Clock

Name*

Volume

* Displayed only when disc title, track title, radio

station name or other name information is labeled.

No display when this information is not labeled.

Tip

The upper dot of the clock display flashes for the first

half of a minute (0 to 29 seconds), and the lower dot

flashes for the last half of a minute (30 to

59 seconds).

To change the preset time

You can change the preset time while the system

is off.

Press CLOCK/TIMER SET.

2 Repeat steps 3 to 5 of “Setting the time”.

• This set can be disassembled in the order shown below.

SECTION 3

DISASSEMBLY

SET

CASE

(Page 24)

FRONT PANEL SECTION

(Page 24)

MD MECHANISM DECK (MDM-7X2A)

(Page 26)

BD (MD) BOARD

(Page 26)

HOLDER ASS’Y

(Page 27)

D.C. FAN (M901), BACK PANEL ASS’Y

SP BOARD, MAIN BOARD AND RDS IC BOARD (AEP, UK models)

(Page 25)

CD MECHANISM DECK (CDM55A-21BD53)

(Page 29)

HOLDER (BU) ASS’Y

(Page 29)

BASE UNIT (BU-21BD53)

HOLDER (55-BU21)

(Page 30)

(Page 25)

TRAY (CDM), LOADING BOARD

(Page 30)

CAM (CDM55)

(Page 31)

GUIDE (L), SLIDER (EJ),

SLIDER, LEVER (HEAD)

(Page 27)

OPTICAL PICK-UP (KMS-262A/J1N),

OVER WRITE HEAD (HR901)

SPINDLE MOTOR ASS’Y (M101),

SLED MOTOR ASS’Y (M102),

LOADING MOTOR ASS’Y (M103)

(Page 28)

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

)

CASE

two screws (CASE3 TP2)

case

two screws (CASE3 TP2)

FRONT PANEL SECTION

front panel section

ground wire

three claws

wire (flat type) (29 core (CN100)

three screws (BVTT3

D.C. FAN (M901), BACK PANEL ASS’Y

)

D.C. fan (M901)

two floating screws (PTPWH M2.6)

back panel ass’y

two claws

three screws (BVTP3 × 10)

five screws (BVTP3 × 10

connector (CN109)

SP BOARD, MAIN BOARD AND RDS IC BOARD (AEP, UK models)

two connectors

connector (CN401) (AEP, UK models)

wire (flat type) (31 core) (CN107)

MAIN board

RDS IC board (AEP, UK models)

(CN103, 801)

SP board

connector (CN994)

screw (BVTT3 × 6)

wire (flat type) (15 core

screw (BVTT3

MD MECHANISM DECK (MDM-7X2A)

four step screws (BVTPWH M3)

two insulators

mechanism deck (MDM-7X2A)

wire (flat type) (17 core) (CN103)

wire (flat type) (27 core) (CN102)

insulator

ground wire

BTN scre (1.7 × 3)

BD (MD) BOARD

insulator

Remove the solder (four portions).

Remove the solder (five portions).

two screws (BTP2 × 6)

BD (MD) board

flexible board (CN104)

HOLDER ASS’Y

holder ass’y

claw

GUIDE (L), SLIDER (EJ), SLIDER, LEVER (HEAD)

slider (EJ)

slider

guide (L)

two screws

(BTP2

lever (CHG)

lever (head)

OPTICAL PICK-UP (KMS-262A/J1N), OVER WRITE HEAD (HR901)

)

optical pick-up (KMS-262A/J1N)

over write head (HR901)

screw (KTP2 × 6)

screw

(KTP2

screw (BTP2 × 6)

main shaft

screw (BTP2 × 6

base (BU-A)

base (BU-D)

gear (SD)

screw

(M1.7, T APPING)

SPINDLE MOTOR ASS’Y (M101), SLED MOTOR ASS’Y (M102), LOADING MOTOR ASS’Y (M103)

belt (loading)

two screws (PWH1.7

2.5)

two screws (PWH1.7

2.5)

loading motor ass’y (M103)

spindle motor ass’y (M101)

three screws (M1.7)

sled motor ass’y (M102)

)

CD MECHANISM DECK (CDM55A-21BD53)

base (MDM) section

loading panel

two claws

CD mechanism deck (CDM55A-21BD53)

connector (CN151)

screw (BVTT3

two screws (BVTT3

wire (flat type) (21 core) (CN1002)

wire (flat type) (31 core) (CN107)

two claws

HOLDER (BU) ASS’Y

holder (BU) ass’y

floating screw (PTPWH M2.6

Rotate the lever (SW)

in the direction of the arrow.

BASE UNIT (BU-21BD53), HOLDER (55-BU21)

base unit (BU-21BD53)

two insulators (BU21)

two cone coil springs

three floating screws (DIA. 12)

floating screw (PTPWH M2.6)

two insulators (BU21)

two cone coil springs

holder (55-BU21)

shaft (BU21)

TRAY (CDM), LOADING BOARD

belt (CDM55)

Pull the tray (CDM) pushing B.

two screws (BTP2.6

Rotate the gear(B) in the direction of arrow

LOADING board

+ 80 hidden pages

LG HCD MD595 Service Manual

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

DISASSEMBLY