Sony HCD-PX333 User Manual

HCD-PX333

SERVICE MANUAL

Ver 1.0 2001. 06

HCD-PX333 is the Amplifier, CD player, MD Deck and Tuner section in CMT-PX333.

US and foreign patents licensed from Dolby Laboratories.

CD Section

MD Section

AEP Model

UK Model

E Model

Australian Model

Model Name Using Similar Mechanism HCD-MD595 CD Mechanism Type CDM55A-21BD53 Base Unit Name BU-21BD53 Optical Pick-up Name OP Assy (A-MAX. 2) Model Name Using Similar Mechanism HCD-MD595 MD Mechanism Type MDM-7X2A Optical Pick-up Name KMS-262

Amplifier section

European model: DIN power output (Rated):20 + 20 watts

(6 ohms at 1 kHz, DIN, 230 V)

Continuous RMS power output (Reference):

25 + 25 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) 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) 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.

SPECIFICATIONS

CD player section

System Compact disc and digital

audio system

Laser Semiconductor laser

(λ=800 nm) Emission duration: continuous

Frequency response 2 Hz – 20 kHz

MD deck section

System MiniDisc digital audio

system

Laser Semiconductor laser

(λ=780 nm) Emission duration:

continuous Sampling frequency 44.1 kHz Frequency response 5 Hz – 20 kHz

Tuner section

FM stereo, FM/AM superheterodyne tuner FM tuner section Tuning range 87.5 – 108.0 MHz

(50 kHz step) Antenna FM lead antenna Antenna terminals 75 ohms unbalanced/

300 ohms balanced Intermediate frequency 10.7 MHz AM tuner section

Tuning range European model: 531 – 1,602 kHz

(with the interval set at

9kHz)

MICRO HI-FI COMPONENT SYSTEM

Other models: 531 – 1,602 kHz

Antenna AM loop antenna

Intermediate frequency 450 kHz

General

Power requirements European model: 230 V AC, 50/60 Hz Australian and Hong Kong models:

Power consumption European model: 70 watts

Other models: 70 watts Dimensions (w/h/d) incl. projecting parts and controls

Mass

Design and specifications are subject to change without notice.

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

External antenna terminals

220 – 240 V AC, 50/60 Hz

0.8 W or less in standby mode

Approx. 190 × 141 × 325 mm Approx. 4.9 kg

9-873-168-01

Sony Corporation

Home Audio Company Shinagawa Tec Service Manual Production Group

HCD-PX333

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 SelfDiagnosis 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 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.

t Remove 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 CD-ROM.

t Remove the disc and turn off the system once,

then turn it on again.

C13/REC Error

Recording could not be performed properly.

t Move 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.

t Replace the MD and start recording over from

the beginning.

C13/Read Error

The MD deck cannot read the disc information properly.

t Remove the MD once, then insert it again.

C14/Toc Error

The MD deck cannot read the disc information properly.

t Replace the MD. t Erase 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).

t The Serial Copy Management System prevents

making a digital copy (see page 44). You cannot record a CD-R.

C71/Check OPT-IN

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

t There 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.

t Connect a digital component to the DIGITAL

OPTICAL IN jack properly using a digital connecting cable.

The connected digital component is not turned on.

t See 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.

t Connect 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.

t Consult your nearest Sony dealer.

E0101/LASER NG

There is a problem with the optical pickup.

t The 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-S55EM/provided with unit: 1-476-664-21) 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 ?/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 ?/1 button to turn the power on.

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

3. Press three buttons of M > TUNING+ , [REC MODE], and . m (MD) simultaneously to enter the MD test mode and display “[Check]”.

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

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

8. Press the [CD SYNC NORMAL] button 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 STEREO/MONO] 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 “rssmin”. 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 ssssssh”. The displayed time is the total of the actual play time. The time is displayed in hexadecimal digits from 0h.

spdl rp tm Displays the spindle motor running time.

Displayed as “rssssssh”. The time is displayed in hexadecimal 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

> “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 .“R” or > “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 clear 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.

HCD-PX333

. “R” or

HCD-PX333

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

HCD-PX333

CD SECTION

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

1. To Enter The CD Test Mode

Procedure:

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

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

3. Press three buttons of x (CD), [ TUNING

] and

[TUNER/BAND] simultaneously.

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

Note: If the consequence was displayed except “dvt ERR CODE”, press the

.m M>

[ TUNING-], [ TUNING+]button to display “dvt

ERR CODE”.

2. Display of Error Number

Procedure:

1. Press the Z (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.

(b)

4. Display of No Disc Error History

Procedure:

1. In the CD test mode menu, press the [ TUNING

[ TUNING+] button to display “dvt ECODE BU”.

2. Press the Z (CD) button to display as bellow.

Display

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

(a)

(a) The number of no disc error.

Latest one “00” to last ten “09” (Press the [ TUNING 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)

(c)

(b) (d)

(e)

] or [ TUNING+] button to

2. Press the (“dvt ERR CODE” is displayed).

3. Display of Mechanical Error History

Procedure:

1. In the CD test mode menu, press the [ TUNING

[ TUNING+]button to display “dvt ECODE MEC”.

2. Press the Z (CD) button to display as bellow.

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

Display

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

(a)

(a) The number of mechanical error.

Latest one “00” to last ten “09” (Press the [ TUNING 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).

(c)

(b) (d)

(e)

],[ TUNING+] button to

3. Press the (“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 [ TUNING

[

TUNING+] button to display “dvt ECNT0 MEC”. (When

erase the mechanical error) Or one more press the [ TUNING+] button to display “dvt ECNT0 BU”. (When erase the no disc error)

2. Press the Z (CD) button to erase the error history (mechanical error or no disc error) and display as bellow.

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

Display

Emc=00Edc=00

5. To Release The CD Test Mode

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

HCD-PX333

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

1. SERVICING NOTES ............................................... 7

2. GENERAL ................................................................... 17

3. DISASSEMBLY ......................................................... 19

4. TEST MODE ............................................................... 31

5. ELECTRICAL ADJUSTMENTS

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

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

6. DIAGRAMS

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

– D/A, A/D Converter Section – ..................................... 52

– Main Section ................................................................ 53

– Display, Power Supply Section – ................................ 54

6-2. Note for Printed Wiring Boards and

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

6-3. Printed Wiring Board – BD (CD) Board – ..................... 56

6-4. Schematic Diagram – BD (CD) Board – ........................ 57

6-5. Printed Wiring Board – BD (MD) Board – .................... 58

6-6. Schematic Diagram – BD (MD) Board (1/2) – .............. 59

6-7. Schematic Diagram – BD (MD) Board (2/2) – .............. 60

6-8. Printed Wiring Board – MD DIGITAL Section – .......... 61

6-9. Schematic Diagram – MD Digital Section (1/3) – ......... 62

6-10. Schematic Diagram – MD Digital Section (2/3) – ......... 63

6-11. Schematic Diagram – MD Digital Section (3/3) – ......... 64

6-12. Printed Wiring Boards – Main Board – ......................... 65

6-13. Schematic Diagram – Main Board (1/2) – ..................... 66

6-14. Schematic Diagram – Main Board (1/2) – ..................... 67

6-15. Printed Wiring Board – AMP Board – .......................... 68

6-16. Printed Wiring Board – SP Board – .............................. 68

6-17. Schematic Diagram – AMP Board – ............................. 69

6-18. Schematic Diagram – SP Board – .................................. 70

6-19. Printed Wiring Boards – Panel Section1 – .................... 71

6-20. Schematic Diagram – Panel Section1 – ........................ 72

6-21. Printed Wiring Boards – Panel Section2 – .................... 73

6-22. Schematic Diagram – Panel Section2 – ........................ 73

6-23. Printed Wiring Boards – Power Board – ....................... 74

6-24. Schematic Diagram – Power Board – ........................... 75

6-25. IC Block Diagrams .......................................................... 77

6-26. IC Pin Function Description ........................................... 81

MODEL IDENTIFICATION

— Back panel —

PART No.

Model Part No.

AEP,UK models 4-231-958-1[]

Homg Kong,Malaysia, Singapore models

Australian model 4-231-958-3

4-231-958-2[]

[]

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

8. ELECTRICAL PARTS LIST .............................. 100

SECTION 1

SERVICING NOTES

HCD-PX333

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 pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

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.

Notes on chip component replacement

• Never reuse a disconnected chip component.

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

Flexible Circuit Board Repairing

• Keep the temperature of 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.

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

Eksplosjonsfare ved feilaktig skifte av batteri.

Benytt samme batteritype eller en tilsvarende type

anbefalt av apparatfabrikanten.

Brukte batterier kasseres i henhold til fabrikantens

instruksjoner.

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

The following caution label is located inside the unit.

CAUTION

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

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. Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin. Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.

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 XX for removing HOLDER (BU) ASS’Y.

HCD-PX333

SERVICE POSITION

• 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.)

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

MD mechanism deck section (MDM-7X2A)

BD (MD) board

CD mechanism deck section (CDM55A-21BD53)

CN103

BD (CD) board

Pin 2 (GND)

CN102

CN1005

CN101

Pin 3 (OUTSW)

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

CN1004

CN1005

CN1003

CN1002

MD DIGITAL board

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

harness

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.

HCD-PX333

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. The names of terminals and the checking items to be performed are shown as follows.

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) GND : Ground TE : Tracking error signal (Traverse adjustment) FE : Focus error signal VC : Reference level for checking the signal RF : RF signal (Check jitter)

I+3V

GND

IOP

I+3V

IOP

GND

FE VC RF

CN105

I+3V IOP GND TE FE VC RF

for

MDM-7X2

HCD-PX333

Note 1:About “R”

As this unit has only a few buttons, some operations require the use of remote commander (RM-S55EN/provided with unit: 1-476-664-21) 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 ?/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 MEMORY (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 ?/1 button to turn the power on.

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

3. Press three buttons of [ TUNING+], [REC MODE], and .m (MD) simultaneously to enter the MD test mode and display

“[Check]”.

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

5. Press the ENTER/YES “R” button to display “AUTO CHECK”, and press the > “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 . “R” or > “R” button. To select the digit : Press the [REC MODE] button after press the [CD SYNC NORMAL] button to display “IT”.

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 STEREO/MONO] button to complete. “Initialize” will be displayed and release the MD test mode.

Display Precedure:

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

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

3. Press three buttons of [ TUNING+], [REC MODE], and .m (MD) simultaneously to enter the MD test mode and display

“[Check]”.

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

5. Press the ENTER/YES “R” button to display “AUTO CHECK”, and press the > “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 STEREO/MONO] 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.

2. Normally a message for selecting the test mode will be displayed. However if the nonvolatile memory is abnormal, the following will be

displayed “INIT EEP?”.

3. Press the x (MD) and Z (MD) buttons simultaneously.

4. Press the . “R” or > “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 : figure1

• 8.4 mW power Specified value : figure2

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

HCD-PX333

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.

Figure1:

SPECIFIED VALUE

Figure2:

SPECIFIED VALUE

KMS-262A KMS-262E

0.84 to 0.92 mW

0.90 to 0.96 mW

8.1 to 8.7 mW

8.4 to 8.9 mW

HCD-PX333

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 . “R” or

> “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 [ 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 TUNING MODE] and [ MD ] simultaneously to enter the retry cause display mode.

8. To check the “track mode”, press the [ 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 31.

N X

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

Hexadecimal

Bit

Binary

Reading the Display:

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

84218421

b7 b6 b5 b4 b3 b2 b1 b0

00000001

00000010

00000100 00001000 00010000 00100000 01000000 10000000

Lower Bits

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

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 level exceeds the specified range When CLV is unlocked When access operation is not performed normally

@@ ###



Address

 

Occurring conditions

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

HCD-PX333

Higher Bits Lower 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

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

HCD-PX333

CD SECTION

CD AGING MODE

Procedure:

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

2. Press the [FUNCTION] button to set the CD function, and press the Z (CD) button to insert a disc.

3. Press three buttons of x (CD) , [ TUNING

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

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

] and x (MD) simultaneously.

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

order while pressing the x (CD) button. Also, release the x (MD), [ TUNING releasing the buttons.

CD aging mode sequence:

CD disk tray open

CD disc tray close

TOC read

Playback track 1

Playback last track

Display aging number

] button, and the x (MD) button in this

] and x (CD) buttons in this order, when

6. To release from this mode, press the

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

?/1 button to turn the power off.

HCD-PX333

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 ?/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 [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 [ TUNING

For details of the displayed contents for each track, refer to “Table 1 : CD-TEXT TEST DISC TEXT Data 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

N X

M >

] or [ TUNING+] button, select the track. The text data of each track will be displayed.

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.

HCD-PX333

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 L M NO (48h to 4Fh) P QR S T U V W (50h to 57h) XYZ [ ¥ ] ^ _ (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¬PR–(A8h to AFh)

•±23

†

µ ¶• (B0h to B7h)

′

14123

º ¿ (B8h to BFh)

АБВГДЕЖЗ (C0h to C7h)

ИЙКЛМНОП (C8h to CFh) D СТУФХЦ ШЩЪЫЬY

(D0h to D7h)

ß (D8h to DFh)

абвгдежз (E0h to E7h)

ийклмноп (E8h to FFh) ∂ стуфхц÷ (F0h to F7h) шщъыьy ÿ (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 U U 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

SECTION 2

GENERAL

This section is extracted from instruction manual.

Parts Identification

The items are arranged in alphabetical order. Refer to the pages indicated in parentheses for details

Main unit

HCD-PX333

wa w;

CD disc tray 9 (8 ) CD SYNC HIGH q; (17) CD SYNC NORMAL qa (17) CD N X ws (9) Display window 3 FUNCTION qh (9, 13, 18, 25, 41) MD insertion slot 2 (13) MD NX 6 (13) PHONES jack qj

2 3 4

qjqk qh qg qf qd qs qa q;

PLAY MODE qg (9, 13, 24) REC/REC IT qs (18) REC MODE qd (20) REPEAT qf (9, 14) STEREO/MONO ql (35) TUNER/BAND qd (34) TUNING MODE qg (34) TUNING +/– w; (34) VOLUME +/– qk

6 7

BUTTON DESCRIPTIONS

?/1 ZMD 4 x (MD) 5 m/M (MD) 7 ./> (MD) 7 ZCD 8 m/M (CD) w; ./> (CD) w; x (CD) ws

HCD-PX333

Remote Control

w; ql

qk qj

qh qg qf

qs qa

Parts Identification

3 4

8 9

CLEAR 6 (11, 15, 26, 36) CLOCK/TIMER SELECT ql

(38) CLOCK/TIMER SET ql (7, 38) DBFB qa (37) DISPLAY qj (8, 11, 15) ENTER/YES qg (7, 10, 14, 23,

25, 34, 38) FUNCTION qf (9, 13, 18, 25, 41) Letter/Number buttons 5 (10, 14,

25)

MD z REC qs (18) MENU/NO qg (11, 23) NAME EDIT 8 (12, 25, 36)

Setting the time

Turn on the system.

Press CLOCK/TIMER SET on the remote.

Proceed to step 5 when you set the clock for the first time.

Press . or > on the remote to select “CLOCK SET?”.

Press ENTER/YES on the remote.

Press + or – on the remote to set the day.

Press ENTER/YES or M on the remote.

The hour indication flashes.

PLAY MODE qk (9, 13, 24) PRESET EQ qa (37) REPEAT qk (9, 14) SCROLL 4 (12, 26) SELECT 8 (12, 25) SLEEP w; (37) STEREO/MONO 2 (35) TIME qj (8, 11, 15) TIME MACHINE REC qs (19) TUNER/BAND 9 (34) TUNING MODE 3 (34) VOLUME +/– q;

BUTTON DESCRIPTIONS

?/1 M/CURSORt >/+

N (MD) qd N (CD) qd X qd x qd m/TCURSOR qh ./– qh

Press + or – on the remote to set the hour.

Press ENTER/YES or M on the remote.

The minute indication flashes.

Press + or – on the remote to set the minute.

Press ENTER/YES on the remote.

The clock starts working.

If you made a mistake

Press m or M on the remote repeatedly until the incorrect item flashes, then set it again.

To change the preset time

Start over from step 1.

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

CASE

(Page 20)

BACK PANEL,

SP BOARD, TUNER

(Page 22)

POWER TRANSFORMER,

DC FAN

(Page 22)

CD MECHANISM DECK

(CDM55A-21BD53)

(Page 27)

HOLDER (BU) ASSY

(Page 28)

AMP BOARD

(Page 23)

MD DIGITAL BOARD

(Page 28)

FRONT PANEL SECTION

(Page 20)

MD MECHANISM DECK

(MDM-7X2A)

(Page 24)

HOLDER ASSY

(Page 25)

OVER WRITE HEAD

(HR901),

BD (MD) BOARD

(Page 24)

SLED MOTOR ASSY

(M102)

(Page 26)

LOADING MOTER ASSY

(M103)

(Page 25)

JACK BOARD,

BL BOARD, VOL BOARD

(Page 21)

REC BOARD, VOL BOARD

(Page 21)

OPTICAL PICK-UP

(KMS-262)

(Page 26)

SPINDLE MOTOR ASSY

(M101)

(Page 27)

MAIN BOARD,

POWER BOARD

(Page 23)

SET

CAM

(CDM55)

(Page 30)

TRAY (CDM),

LOADING BOARD

(Page 29)

BASE UNIT (BU-21BD53),

HOLDER (55-BU21),

(Page 29)

HCD-PX333

SECTION 3

DISASSEMBLY

HCD-PX333

3-1. CASE

two screws

(CASE3 TP2)

case

two screws

(CASE3 TP2)

3-2. FRONT PANEL SECTION

front panel section

wire (flat type)(23 core)

(CN100)

three claws

three screws (+BVTT3 × 6)

3-3. JACK BOARD, BL BOARD, PANEL BOARD, LCD

wire (flat type)(23 core)

(CN601)

four screws (+BVTP 2.6 × 8)

holder (LCD)

lid (LCD holder)

LCD

plate (LCD), light guide

sheet, diffusion

PANEL board

BL board

JACK board

two screws (+BVTP 2.6 × 8)

connector 2p (CN604)

connector 2p (CN606)

spacer (LCD)

HCD-PX333

3-4. REC BOARD, VOL BOARD

shaft (lid rec)

screw (+BVTP 2.6 × 8)

three screws (+BVTP 2.6 × 8)

REC board

buttan (REC)

VOL board

screw (+PTPWH M2.6)

screw (+BVTP 2.6 × 8)

spring (lid func), leaf

two screws (+BVTP 2.6 × 8)

lid (REC)

HCD-PX333

)

3-5. BACK PANEL, SP BOARD, TUNER

two connectors

(CN103, 801)

SP board

wire (flat type)

(11 core)

tuner pack (FM/AM)

back panel

four screws

(+BVTP3

10)

four screws

(+BVTP3

3-6. TRANSFORMER, POWER and DC FAN

connector 2p

(CN992)

connector 4p

(CN993)

screw (+BVTP3 ×10)

transformer, power (T900)

two screws

(+B3

16)

four screws

(+BVTT 3

spacer (FAN)

Remove two solderings.

DC fan

(M901)

3-7. MAIN BOARD, POWER BOARD

connector 2p (CN991)

POWER board

connector 2p (CN992)

connector 4p (CN993)

screw (+BVTT 3 × 6)

wire (flat type)(31 core)

(CN107)

wire (flat type)(11 core)

(CN105)

MAIN board

connector (CN101)

two screws (+BVTT 3 × 6)

HCD-PX333

3-8. AMP BOARD

screw (+BV 3 × 10)

screw (+BVTT 3 × 6)

bracket (H/S F)

screw (+BV 3 × 10)

heat sink

two screws (+BVTT 3 × 6)

screw (+BVTT 3 × 6)

bracket (H/S R)

three screws (+BVTP 3 × 10)

AMP board

two screws (+BV 3 × 10)

screw (+BVTT 3 × 6)

HCD-PX333

)

3-9. MD MECHANISM DECK (MDM-7X2A)

ground wire

four screws

(+BVTPWH M3), step

two insulators

MD mechanism deck

(MDM-7X2A)

screw (1.7 × 3), btn

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

wire (flat type)(27 core)(CN102

two insulators

3-10. OVER WRITE HEAD (HR901), BD (MD) BOARD

Note : When the 1 connector (CN104) is removed first

of all, the overwrite head (HR901) and the BD (MD) board can be removed to either side.

Note : The overwrite head (HR901) is very fragile and

easy to be damaged. Be careful to handle it gently with care not to break it.

Remove four solderings

head, over write (HR901)

screw (+P1.7 × 6)

BD (MD) board

connector (CN104)

Remove five solderings

two screws (+BTP2 × 6)

flexible board (CN101)

3-11. HOLDER ASSY

spring (holder), tension

boss

holder assy

boss

HCD-PX333

claw

3-12. LOADING MOTOR ASSY (M103)

two screws

(+PWH1.7 × 3.5)

motor assy, loading

(M103)

belt (loading)

HCD-PX333

)

3-13. SLED MOTOR ASSY (M102)

two screws

(+BTP2

slider (EJ)

slider

guide (L)

lever (CHG)

Slide in the direction of arrow A while

pulling up the claw.

lever (head)

two screws

(+PWH1.7

motor assy, sled (M102

3.5)

3-14. OPTICAL PICK-UP (KMS-262)

flexible board

base, SL

screw (+P1.7 × 6)

optical pick-up

(KMS-262)

two screws (+K2 × 6)

Pull out the main shaft.

screw

(+BTP2

base (BU-A)

screw (M1.7), tapping

gear (SD)

3-15. SPINDLE MOTOR ASSY (M101)

)

motor assy, spindle

(M101)

HCD-PX333

3-16. CD MECHANISM DECK (CDM55A-21BD53)

panel, loading

screw (+BVTT3 × 6)

three screws (M1.7),

tapping (M1.7)

four screws (+BVTT 3 × 6)

wire (flat type)(21 core

(CN1002)

CD mechanism deck

(CDM55A-21BD53)

connector 5p (CN151)

two claws

HCD-PX333

3-17. MD DIGITAL BOARD

connector 5p (CN1005)

two claws

MD DIGITAL board

wire (flat type)(17 core)

(CN1004)

wire (flat type)(27 core)

(CN1003)

3-18. HOLDER (BU) ASSY

holder (BU) assy

screw (+BV 3 × 10)

wire (flat type)(31 core)

(CN1001)

screw (+PTPWH M2.6),

floating

Rotate the lever (SW) in the direction of arrow A.

3-19. BASE UNIT (BU-21BD53), HOLDER (55-BU21)

base unit (BU-21BD53)

three insulators (BU21)

three springs, cone coil

three screws (+PTPWH M2.6), floating

floating

HCD-PX333

screw (+PTPWH M2.6),

insulator (BU21)

spring, cone coil

holder (55-BU21)

shaft (BU21)

3-20. TRAY (CDM), LOADING BOARD

claw

belt (CDM55)

Pull the tray (CDM)

while pushing the claw.

(+BTP2.6 × 6)

two screws

direction of arrow A.

LOADING board

Rotate the gear (B) in the

HCD-PX333

)

3-21. CAM (CDM55)

lever (SW)

spring, torsion

gear (B)

spacer (55)

pulley (LDG)

gear (A)

roller

cam (CDM55

+ 82 hidden pages

Sony HCD-PX333 User Manual

SELF-DIAGNOSIS FUNCTION

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

DISASSEMBLY

case

front panel section

AMP board

holder assy

MD DIGITAL board

holder (BU) assy