Sony HCD-M500AV Service manual

HCD-M500AV

SERVICE MANUAL

Ver 1.1 2001. 07

HCD-M500AV is the tuner, deck, CD and amplifier section in MHC-M500AV.

Manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol ; and “PRO LOGIC” are trademarks of Dolby Laboratories Licensing Corporation.

SECTION

TAPE DECK

SECTION

Model Name Using Similar Mechanism HCD-MC3AV

CD Mechanism Type CDM-46B1

Optical Pick-up Name KSM-213BFN/C2NP

Model Name Using Similar Mechanism NEW

Tape Transport Mechanism Type TCM-230AWR21

US Model

Amplifier section U.S.A models:

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC DISTORTION: With 6 Ω loads both channels driven, from 120 – 10,000 Hz; rated 75 W per channel minimum RMS power, with no more than 10% total harmonic distortion from 250 mW to rated output.

Front Speaker:

Continuous RMS power output

75 + 75 W (6 Ω at 1 kHz, 10% THD)

Total harmonic distortion

less than 0.09% (6 Ω at 1 kHz, 40 W)

Center Speaker:

Continuous RMS power output

35 W (6 Ω at 1 kHz. 10% THD)

Rear Speaker:

Continuous RMS power output

35 + 35 W (6 Ω at 1 kHz, 10% THD)

SPECIFICATIONS

Inputs VIDEO/MD IN (phono jack):

voltage 250 mV/450 mV, impedance 47 kΩ

DVD FRONT (phono jacks): voltage 450 mV,

impedance 47 kΩ

REAR (phono jacks): voltage 450 mV,

impedance 47 kΩ

CENTER (phono jacks): voltage 450 mV,

impedance 47 kΩ

WOOFER (phono jacks): voltage 450 mV,

impedance 47 kΩ

Outputs PHONES (stereo phone jacks):

accepts headphones of 8 Ω or more FRONT SPEAKER: accepts impedance of 6 to 16 Ω REAR SPEAKER: accepts impedance of 6 to 16 Ω CENTER SPEAKER: accepts impedance of 6 Ω SUPER WOOFER: voltage 1 V, impedance 1 kΩ

— Continued on next page —

9-929-288-12

COMPACT COMPONENT SYSTEM

Sony Corporation

Home Audio Company

Shinagawa Tec Service Manual Production Group

CD player section

System Compact disc and digital audio system Laser Semiconductor laser (λ =780 mm)

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

7 mm aperture. Frequency response 2 Hz – 20 kHz (± 0.5 dB) Wavelength 780 – 790 nm Signal-to-noise ratio More than 90 dB Dynamic range More than 90 dB CD OPTICAL DIGITAL OUT (Square optical connector jack, rear panel) Wave length 600 nm Output level –18 dBm

AM tuner section

Tuning range 530 – 1,710 kHz

(with the interval set at 10 kHz) 531 – 1,710 kHz

(with the interval set at 9 kHz) Antenna AM loop antenna Antenna terminals External antenna terminal Intermediate frequency 450 kHz

General

Power requirements 120 V AC, 60 Hz

Power consumption 210 W

Dimensions (w/h/d) Approx. 280 × 373 × 468 mm

Mass Approx. 11.0 kg

Tape player section

Recording system 4-track 2-channel stereo Frequency response 40 – 13,000 Hz (± 3 dB),

using Sony TYPE I cassette

Tuner section

FM stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range 87.5 – 108.0 MHz Antenna FM lead antenna Antenna terminals 75 Ω unbalanced Intermediate frequency 10.7 MHz

Supplied accessories: AM loop antenna (1)

Remote commander (1)

Batteries (2)

FM lead antenna (1)

Speaker cords (2)

Center speaker pads (4)

Manual connecting cord (1)

Design and specifications are subject to change without notice.

CAUTION

0.15µF

To Exposed Metal Parts on Set

1.5kΩ

AC voltmeter (0.75V)

Earth Ground

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

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

SAFETY CHECK-OUT

(US model only)

After correcting the original service problem, perform the following safety checks 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

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 microampers). Leakage current can be measured by any one of three methods.

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

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

2. A battery-operated AC 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 low-voltage 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 2V AC range are suitable. (See Fig. A)

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

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.

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.

TABLE OF CONTENTS

1. GENERAL

Font Panel ··············································································· 5 Rear Panel ·············································································· 6

2. DISASSEMBLY ······························································· 8

3. TEST MODE ··································································· 16

4. MECHANICAL ADJUSTMENTS ···························· 18

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.

LASER DIODE AND FOCUS SEARCH OPERATION CHECK

Carry out the “S curve check” in “CD section adjustment” and check that the S curve waveform is output repeatedly.

Notes on chip component replacement

• Never reuse a disconnected chip component.

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

by heat.

Flexible Circuit Board Repairing

• Keep the temperature of the soldering iron around 270 ˚C during

repairing.

• Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering or

unsoldering.

5. ELECTRICAL ADJUSTMENTS

Deck Section ········································································ 21 CD Section ··········································································· 23

6. DIAGRAMS

6-1. Block Diagram – CD Section – ········································ 24

Block Diagram – Main Section – ····································· 25

Block Diagram – Audio Section –···································· 26 6-2. Circuit Boards Location ··················································· 27 6-3. Printed Wiring Board – BD Section – ······························ 28 6-4. Schematic Diagram – BD Section – ································· 29 6-5. Printed Wiring Board – CD Motor Section – ··················· 30 6-6. Schematic Diagram – CD Motor Section – ······················ 31 6-7. Printed Wiring Board – Audio Section – ·························· 32 6-8. Schematic Diagram – Audio Section –····························· 33 6-9. Printed Wiring Board – Main Section – ··························· 34 6-10. Schematic Diagram – Main (1/6) Section – ····················· 35 6-11. Schematic Diagram – Main (2/6) Section – ····················· 36 6-12. Schematic Diagram – Main (3/6) Section – ····················· 37 6-13. Schematic Diagram – Main (4/6) Section – ····················· 38 6-14. Schematic Diagram – Main (5/6) Section – ····················· 39 6-15. Schematic Diagram – Main (6/6) Section – ····················· 40 6-16. Printed Wiring Board – Power Section – ························· 41 6-17. Schematic Diagram – Power Section – ···························· 41 6-18. Printed Wiring Board – Panel Section – ··························· 42 6-19. Schematic Diagram – Panel Section – ····························· 43 6-20. Printed Wiring Board – Front Amp Section – ·················· 44 6-21. Schematic Diagram – Front Amp Section – ····················· 45 6-22. Schematic Diagram – Rear Amp Section – ······················ 46 6-23. Printed Wiring Board – Rear Amp Section – ··················· 47 6-24. Waveforms ········································································ 48 6-25. IC Pin Function Description ············································· 48 6-26. IC Block Diagrams ··························································· 56

7. EXPLODED VIEWS ····················································· 59

8. ELECTRICAL PARTS LIST ····································· 66

FRONT PANEL

5 4 3

2 1

el ek ej

eh eg ef

SECTION 1

GENERAL

678 90 qaqsqd qfqgqh

qj qk

w; wa ws wd

wf wg wh wj

1 @/1 button 2 STANDBY indicator 3 MEMO INPUT button 4 MEMO SCAN button 5 MEMO SEARCH button 6 TAPE A h button and indicator 7 CD 7 button and indicator 8 TAPE A H button and indicator 9 Display window 0 x (STOP) button qa TAPE B h button and indicator qs TUNER/BAND button qd TAPE B H button and indicator qf CHECK button qg CLEAR button qh DELETE button qj GROOVE button and indicator qk FUNCTION button ql DSP button and indicator w; DBFB button

wle;eaesed

wa CONTINUE/STEREO/MONO button ws ENTER button wd PROGRAM/TUNER MEMORY button wf SHUFFLE/DIRECTION button wg + M > button wh . m – button wj SELECTOR dial wk PHONES jack wl FILE SELECT button e; VOLUME knob ea X PAUSE button and indicator es CD SYNCHRO button ed z REC button ef CD PLUS ONE button eg TIMER SELECT button and indicator eh CLOCK TIMER SET button ej DISPLAY button ek PROLOGIC button and indicator el DVD5.1CH button and indicator

REAR PANEL

5 6 7 8

1 CD DIGITAL OUT connector 2 SUPER WOOFER jack 3 DVD INPUT jack 4 MD/VIDEO INPUT (AUDIO) jack 5 ANTENNA terminal 6 CENTER SPEAKER terminal 7 REAR SPEAKER terminal 8 FRONT SPEAKER terminal 9 AC power cord

This section is extracted from instruction manual.

SECTION 2

)

DISASSEMBLY

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

2-1. CASE

3 Case

2 Three screws

(BVTP 3 × 8)

1 Three screws (CASE3 TP2)

2-2. FRONT PANEL SECTION

2 Wire (flat type) (15 core)

qa Front panel assy

7 Screws

(BVTT 3 × 8)

1 Wire (flat type) (17 core)

8 Lug

1 Three screws

(CASE3 TP2)

4 Connector(CN804)

0 Two claws

5 Connector(CN604A

3 Wire (flat type) (10 core)

6 Connector(CN453)

0 Two claws

9 Three screws (BVTP 3 × 8)

2-3. DOOR ASSY

)

1 Two screws (PTPWH 2.6 × 8)

3 Remove the door ass

to direction of the arrow A.

2-4. BACK PANEL

1 Connector (CN802)

2 Connector(CN751)

2 Open the door assy

7 Eight screws

(BVTP 3 × 8)

6 Two screws (BVTP 3 × 8)

5 Three screws (BVTP 3 × 8)

3 Five screws (BVTP 3 × 8

4 Cover

8 Remove the back panel

to direction of the arrow.

2-5. MAIN BOARD

9 Connector(CN454)

3 Connector(CN902)

1 Wire (flat type) (16 core)

5 Connector(CN454)

4 Connector(CN801B)

8 Connector(CN403)

7 Connector(CN451)

2 Wire (flat type) (9 core)

qa Remove the MAI

board to direction of the arrow.

6 Connector(CN461)

0 Two screws

(BVTP 3 × 8)

2-6. POWER TRANSFORMER (T991)

7 Power transforme (T991)

3 Connector CN995

4 Two screws

(BVTT3 x 8)

5 Sub trans board

Four screws

(BVTT 3 × 8)

1 Connector CN992

2 Power cor

2-7. SUB CHASSIS

2 Three screws

(BVTP 3 × 8)

1 Two screws (BVTT 3 × 8)

3 Sub chassis

2-8. CD MECHANISM DECK SECTION

5 Two screws (BVTT 3 × 6)

7 Reinforcement

1 Screw

(PTPWH 2.6 × 8)

0 Screw (BVTT 3 × 14)

6 Wire holder

2 Two screws

(BVTP 3 × 8)

Three screws

(BVTT 3 × 10)

9 Base (LOADING)

qa Screw

(BVTT 3 × 10)

qs Base (CDM)

3 Two screws

(BVTP 3 × 8)

2 Table (50)

4 Cover (CD)

2-9. CD BASE UNIT

1 Two screws (BTVP 3 × 8)

2 Bracket

3 Two tention springs

5 Base unit

4 Four screws

(PTPWH 2.6 × 8)

2-10. BD BOARD, SLED MOTOR (M102)

6 Gear (A) (S)

5 Claw

0 Two screws (P 2 × 3)

qa Sled motor

(M102)

8 Gear cover

7 Three claws

9 Gear (B) (RP)

1 Wire (flat type) (16 core)

4 BD board

3 Removal four solders.

2 Screw (PTPWH 2 × 5)

2-11. OPTICAL PICK-UP

3 Remove the optical pick-up to direction of the arrow A.

2 Sled shaft

2-12. TAPE MECHANISM DECK SECTION

2 Remove the cassette lid (L) assy to direction of the arrow B.

1 Remove the cassette lid (R) assy to direction of the arrow A.

1 Claw

4 Remove the tape mechanism

deck section.

3 Three screws

(BVTP 2.6 × 8)

3 Three screws (BVTT 3 × 6)

2-13. PANEL BOARD

3 Remove the cassette lid (L) assy

3 Remove the cassette lid (R) assy

5 Two screws (BVTP 2.6 × 8)

6 Remove the TC bracket

4 Remove the spring (B deck)

qa Five screws

(BVTP 2.6 × 8)

4 Remove the spring (A deck)

qa Nine screws

(BVTP 2.6 × 8)

qa Five screws (BVTP 2.6 × 8)

qs Remove the panel (L) board

qf Remove the panel board

qd Remove the panel (R) board

8 Volume ring

7 Volume knob

9 Selector ring

0 Selector ring

2-14. CASSETTE BOARD

4 CASSETTE board

2-15. CAPSTAN MOTOR (M1)

Remove the capstan motor

to direction of the arrow.

2 Remove the belt.

3 Two screws

(BVTT 2 × 4 (S))

1 Four rivets

2 Break the soldering of tw

flexible flat cables.

3 Remove the belt.

1 Two screws

(PS 2.6 × 5)

SECTION 3

TEST MODE

[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 three buttons x , ENTER and @/1 at the same

time.

2. The fluorescent indicator tube turns off for a moment and the RAM is reset to the initial conditions.

[MC Hot Reset]

* This mode resets the set with the preset data kept stored in the

memory. This hot reset mode is performed also when the power cord is plugged in and out.

Procedure:

1. Press the three buttons x , ENTER and FUNCTION at the same time.

2. The fluorescent indicator tube turns off for a moment and the RAM is reset to the initial conditions.

[CD Initial]

* The CD INITIAL clears all of the CD related data. Execute

this mode when returning the set to the customer.

Procedure:

1. Press the three buttons x , ENTER and CONTINUE/ STEREO/MONO at the same time.

2. The message “STANDBY” appears on the fluorescent indicator tube and the CD related data is reset to the initial conditions.

[CD Line Test]

* The CD Line test displays the rotating time required for one

rotation by rotating the disc tray.

Procedure:

1. Press the three buttons x , ENTER and CLOCK/TIMER SET at the same time. The CD PLAY LED and the CD PAUSE LED flash alternately and the disc tray starts rotation.

2. The message “xx << y.y” appears on the fluorescent indicator tube. The left numbers count up the discs starting from 1 to 51. The left numbers “y.y” indicate the rotating time required for one rotation by rotating the disc tray.

3. To exit the CD LINE test mode, execute the MC Hot Reset.

[CD Memo All Clear]

* The mode clears all contents of the CD disc memo. Execute

this mode when returning the set to the customer.

Procedure:

1. Press the two buttons MEMO INPUT and ENTER at the same time.

2. The message “ALL ERASE” appears on the fluorescent indicator tube and the CD disc memo is all cleared.

Procedure:

1. Press the three buttons x , ENTER and DISPLAY at the

same time. The set enters the GC test mode, and all of the fluorescent tubes and LEDs turn on.

2. From this state, any one of the three modes MODEL NAME, KEY CHECK and VACS can be selected. Go to step 3 to enter the MODEL NAME test mode. Go to step 5 to enter the KEY CHECK test mode. Go to step 11 to enter the VACS test mode.

3. [MODEL NAME test mode ] From the state of step 2, press the CONTINUE/STEREO/MONO button. Every pressing of the CONTINUE/STEREO/MONO button advances the following check modes and displays in the given order. Model name display, destination display, MC version display, GC version display, DC version display, VC version display and CC version display.

4. To exit the GC test mode and to return to the STANDBY mode, press the x , ENTER and DISPLAY buttons again.

5. [KEY CHECK test mode ] You can enter this mode directly from step 2. When you performed steps 3, perform steps 4, then 1 and 2 before starting the step 5. [KEY CHECK test mode ] From the GC test mode, press the PROGRAM/TUNER MEMORY button to enter the key check mode. The display: K 1, J 0, V 0 appears.

6. The value after K indicates the number of times that the key is pressed. 1 is displayed because the PROGRAM/TUNER MEMORY button has already been pressed.

7. When other keys are pressed one after another, the key count increases up to 43. The keys which have already been pressed, are not counted.

8. The value after J indicates the number of clicks that the JOG dial is rotated. The clockwise rotation increases the count value. The counter-clockwise rotation decreases the count value.

9. The value after V also indicates amount of rotation of volume control. The clockwise rotation increases the count value. The counter-clockwise rotation decreases the count value.

10. To exit the GC test mode and to return to the STANDBY mode, press the x , ENTER and DISPLAY buttons again.

11. [VACS test mode ] You can enter this mode directly from step

2. When you performed steps 3, perform steps 4, then 1 and 2 before starting the step 5. [VACS test mode ] From the GC test mode, press the SHUFFLE button to enter the VACS attenuation check mode. The display: VOL NORMAL appears.

12. To exit the GC test mode and to return to the STANDBY mode, press the x , ENTER and DISPLAY buttons again.

[Aging Mode]

The decks A and B are operated automatically for aging purpose. When errors occur during aging, causes of errors are displayed and the aging mode is stopped.

How to enter the aging mode

1. Turn on the main power. Install a playback tape to deck A and install a blank tape to deck B.

2. Select TAPE A with the FUNCTION button.

3. Press the three buttons of x , ENTER and SHUFFLE at the same time to enter the aging mode.

[GC Test Mode]

* This mode checks microprocessor version number, keys,

fluorescent tubes, LEDs and VACS (Variable Attenuation Control System).

How to exit the aging mode.

Turn off the main power.

1. Rewind the tapes A and B. Tapes stop at the shut-off of tape A and the aging mode advances to the next step. The message: TAPE A AG-1 appears.

2. The tape A is played back in the FWD mode. After two minutes of the FWD playback, the aging mode advances to the next step. The message: TAPE A AG-2 appears.

3. The tape A runs in fast forward. After two minutes of fast forward, or at the shut-off point, the tape is stopped and the aging mode advances to the next step. The message: TAPE A AG-3 appears.

4. The tape A is played back in the RVS mode. After two minutes of the RVS playback, the aging mode advances to the next step. The message: TAPE A AG-4 appears.

5. The tape A is rewound and stops at the shut-off. The aging mode advances to the next step. The message: TAPE A AG-5 appears.

6. The tape B is played back in the FWD mode. After two minutes of the FWD playback, the aging mode advances to the next step. The message: TAPE B AG-2 appears.

7. The tape B runs in fast forward. After two minutes of fast forward, or at the shut-off point, the tape is stopped and the aging mode advances to the next step. The message: TAPE B AG-3 appears.

8. The tape B is played back in the RVS mode. After two minutes of the RVS playback, the aging mode advances to the next step. The message: TAPE B AG-4 appears.

9. The tape B is rewound and stops at the shut-off. The aging mode advances to the next step. The message: TAPE B AG-5 appears.

[AM TUNER STEP 9 kHz/10 kHz Selection Mode]

* Either the 9 kHz step or 10 kHz step can be selected for the AM

channel step.

Procedure:

1. Turn on the power and select TUNER using the FUNCTION button.

2. Select AM with the TUNER/BAND button and turn off the power.

3. Press the two buttons ENTER and @/1 at the same time. The main power is turned on and the other frequency step of the previous mode is selected and displayed. “AM 9 k STEP” or “AM 10 k STEP”

[CD SRAM Test Mode]

Procedure:

1. Turn on the power and select CD using the FUNCTION button.

2. Press the three buttons x , ENTER and DBFB at the same time.

3. The message “SRAM OK” appears on the fluorescent indicator tube.

[GC VACS ON/OFF Mode]

Procedure:

1. Press the two buttons DELETE and @/1 at the same time.

2. The message “VACS ON” or “VACS OFF” appears on the fluorescent indicator tube.

SECTION 4

MECHANICAL ADJUSTMENTS

• TAPE MECHANISM DECK SECTION

Precaution

1. Clean the following parts with a denatured alcohol-moistened swab: record/playback heads pinch rollers erase head rubber belts capstan idlers

2. Demagnetize the record/playback head with a head demagnetizer.

3. Do not use a magnetized screwdriver for the adjustments.

4. After the adjustments, apply suitable locking compound to the parts adjusted.

5. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

• Torque Measurement

Mode

FWD

back tension

REV

back tension

FF/REW

FWD tension

REV tension

Torque meter Meter reading

CQ-102RC

CQ-102C

CQ-201B

CQ-403A

CQ-403R

3.06 N • m to 6.96 N • m

31 to 71 g • cm

(0.43 – 0.98 oz • inch)

0.19 N • m to 0.58 N • m

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

3.06 N • m to 6.96 N • m

31 to 71 g • cm

(0.43 – 0.98 oz • inch)

0.19 N • m to 0.58 N • m

2 to 6 g • cm

(0.02 – 0.08 oz • inch)

6.96 N • m to 14.02 N • m

71 to 143 g • cm

(0.98 – 1.99 oz • inch)

9.80 N • m

100 g or more

(3.53 oz or more)

9.80 N • m

100 g or more

(3.53 oz or more)

• CD MECHANISM DECK SECTION

To adjust the mechanism section, enter the mechanism section adjustment mode. For how to enter the mechanism section adjustment mode, refer to each adjustment section.

DISC SENSOR ALIGNMENT

1. Make sure that there is no disc in the unit.

2. Connect an oscilloscope to IC401rs, IC4014 of the MAIN board.

oscilloscope

IC401rs D.SENS (CH1)

IC4014 HHOUT (CH2)

GND

3. Press the @/1 button to turn ON the power.

4. Press the x button, ENTER button and CLOCK/TIMER SET button simultaneously.

PLUS ONE

5. The disc table rotates in the clockwise direction. The disc table rotation time is displayed with “PLUS ONE” slit as a measuring point.

6. Measure the waveform of the oscilloscope when the disc table is rotating.

7. Move the holder (sensor) center so that the flat portion center at the top of the D.SENS (CH1) input waveform and the “H” center of HHOUT (CH2) coincide.

D.SENS (CH1) waveform

Holder (sensor)

HHOUT (CH2) waveform

Fixed screw

Flat portion center of D.SENS (CH1) waveform

8. Tighten the fixed screw to fix the disc table, then press the CLEAR button.

9. The disc table rotates in the counterclockwise direction. Measure the waveform and make sure that the flat portion center at the top of the D.SENS (CH1) input waveform and the “H” center of HHOUT (CH2) coincide.

10. If the adjustment is not successful, press the CLEAR button to rotate the disc table in the clockwise direction, and perform steps 6 to 9.

Note: During the adjustment mode, the rotational direction is switched each time the CLEAR button is pressed.

Pressing the CHECK button enters the loading mode which will be described later. Pressing the CLEAR button rotates the disc table again.

MAGNET ASSY ALIGNMENT

)

1. Check that there is no disc in the unit and then press the @/1 button to turn ON the power. Open the door, and set a disc in the PLUS

ONE slit.

2. Close the door, and while pressing the x button, ENTER button and CLOCK/TIMER SET button simultaneously.

3. Press the CHECK button, and set the loading mode.

4. Press the + J L button and chuck the disc.

5. Adjust the magnet assembly and magnet holder so that A = B as shown in the figure.

Magnet ASSY

Magnet holder

Magnet ASSY

Screw (For adjustment)

DISC HOLDER A ALIGNMENT

1. Check that there is no disc in the unit and then press the @/1 button to turn ON the power. Open the door, and set a disc in the PLUS

ONE slit.

2. Close the door, and while pressing the x button, ENTER button and CLOCK/TIMER SET button simultaneously.

3. Press the CHECK button, and set the loading mode.

4. Press the + J L button and chuck the disc.

5. Press + J L or l j – button to stop the disc holder A slightly away from the disc.

6. Rotate and adjust the adjusting screw so that the center of the disc and that of the disc holder coincide.

Disc

Disc holder A

a = b

Disc holder A

Disc

Screw (For adjustment

SECTION 5

ELECTRICAL ADJUSTMENTS

DECK SECTION

0 dB = 0.775 V

1. Demagnetize the record/playback head with a head demagnetizer.

2. Do not use a magnetized screwdriver for the adjustments.

3. After the adjustments, apply suitable locking compound to the parts adjust.

4. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

5. The adjustments should be performed in the order given in this service manual. (As a general rule, playback circuit adjustment should be completed before performing recording circuit adjustment.)

6. The adjustments should be performed for both L-CH and RCH.

7. Switches and controls should be set as follows unless otherwise specified.

• Test Tape

Tape Signal Used for

P-4-A100 10 kHz, –10 dB Azimuth Adjustment

WS-48B 3 kHz, 0 dB Tape Speed Adjustment

P-4-L300 315 Hz, 0 dB Level Adjustment

Record/Playback Head Azimuth Adjustment

DECK A/B

Note: Perform this adjustments for both decks

Procedure:

1. Mode: Playback

test tape P-4-A100 (10 kHz, –10 dB)

main board CN301B Pin qs (L-CH) Pin qa (R-CH)

set

main board CN301B Pin 0 (GND)

level meter

+ –

2. Turn the adjustment screw and check output peaks. If the peaks do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 1 dB of peak.

Output level

within 1dB

L-CH peak

R-CH peak

within 1dB

Screw position

L-CH peak

Screw position

R-CH peak

3. Mode: Playback

test tape P-4-A100 (10 kHz, –10 dB)

L-CH

MAIN board CN301B set

R-CH

in phase 45 ° 90° 135° 180°

pin qs

pin 0

waveform of oscilloscope

good

oscilloscope

wrong

4. After the adjustments, apply suitable locking compound to the pats adjusted.

Adjustment Location: Playback Head (Deck A).

Record/Playback/Erase Head (Deck B).

Tape Speed Adjustment DECK A/B

(

)

Note: Start the Tape Speed adjustment as below after setting to the test

mode.

Procedure:

1. Press the @/1 button to turn ON the power.

2. Press the x button, ENTER button and TIMER SELECT

button simultaneously. (The “VOLUME” on the fluorescent indicator tube will blink while in the test mode.) To exit from the test mode, press the @/1 button.

Mode: Playback

test tape WS-48B (3 kHz, 0 dB)

set

main board CN301B (Pin qs : L-CH)

frequency counte

–

Pin qa : R-CH

1. Insert the WS-48B into the deck.

2. Press the H button on the deck.

3. Adjust RV1001 on the LEAF SW board so that frequency counter reads 3,000 ± 90 Hz.

Adjustment Location: LEAF SW board

[MAIN BOARD] (Component Side)

CN301B

CN402

[CASSETTE BOARD] (Component Side)

VR301

LEVEL

IC301

CN401

216

115

1211

CN301

IC501

11 1

12 2

Sample Value of Wow and filter

W, RMS (JIS) within 0.3% (test tape: WS-48B)

Playback level Adjustment DECK A/B

Procedure:

Mode: Playback

test tape P-4-L300 (315 Hz, 0 dB)

set

Phones jack (HP801)

level meter

–

Adjust DECK A/B: VR301 (R-CH) so the level meter reading becomes the adjustment limits below.

Adjustment Level:

CN301 PB level: 155 to 275 mV (– 14 to – 9 dB) level difference between the channels: within ± 0.5 dB Adjustment Location: CASSETTE board

[LEAF SW BOARD] (Component Side)

TAPE SPEED

(NORMAL)

RV1001

CN1001

CD SECTION

IC102

IC101

(VC)

(TE)

(FE)

(RF)

(PLCK)

CN101

CN102

CN103

(DVDD)

(TOFF)

Note :

1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10 MW impedance.

4. Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks.

oscilloscope

BD board

TP (FE) TP (VC)

S Curve Check

Procedure :

1. Connect the oscilloscope to TP (FE) of the BD board.

2. Press the @/1 button to turn ON the power .

3. Open the front cover, and press the CD PLUS ONE button.

4. Set the disc (YEDS-18) into the “PLUS ONE” slit.

5. Close the front cover, and chuck the disc.

6. The first track will be played back automatically.

7. Check the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 1.8 ±

0.6 Vp-p.

S-curve waveform

symmetry

within 1.8 ± 0.6Vp-p

8. Turn OFF the power.

Note : • Try to measure several times to make sure than the ratio

of A : B or B : A is more than 10 : 7.

• Take sweep time as long as possible and light up the brightness to obtain best waveform.

RF Level Check

oscilloscope

BD board

TP (RF) TP (VC)

Procedure :

1. Connect the oscilloscope to TP (RF) of the BD board.

2. Press the @/1 button to turn ON the power.

3. Open the front cover, and press the CD PLUS ONE button.

4. Set the disc (YEDS-18) into the “PLUS ONE” slit.

5. Close the front cover, and chuck the disc.

6. Playback the fifth track of the disc.

7. Confirm that oscilloscope waveform is clear and check RF sig-

8. Turn OFF the power.

nal level is correct or not.

Note : A clear RF signal waveform means that the shape “◊” can be

clearly distinguished at the center of the waveform.

RF signal waveform

VOLT/DIV : 200mV TIME/DIV : 500ns

level : 1.8 ± Vp-p

+0.3 –0.2

E-F Balance (Traverse) Check

The procedure for this checking method differs for when a general remote control unit is used and not used.

oscilloscope

BD board

TP (TE) TP (VC)

1. Solder lead wires to TP (DVDD) and TP (TOFF) on the BD board severally.

2. Connect the oscilloscope to TP (TE) of the BD board.

3. Press the @/1 button to turn ON the power.

4. Open the front cover, and press the CD PLUS ONE button.

5. Set the disc (YEDS-18) into the “PLUS ONE” slit.

6. Close the front cover, and chuck the disc.

7. Playback the fifth track of the disc.

8. Short-circuit the lead wire connected at step 1. (The tracking servo is turned OFF)

9. Check the level B of the oscilliscope's waveform and the A (DC voltage) of the center of the Traverse waveform. Confirm the following : A/B × 100 = less than ± 10%

Traverse waveform

Center of the waveform

A (DC voltage)

level : 0.7 ± 0.3 Vp-p

10. Disconnect the lead wire short-circuited at step 8. (The tracking servo is turned ON.) Confirm the C (DC voltage) is almost equal to the A (DC voltage) is step 8.

Traverse waveform

C (DC

Tracking servo

OFF

Tracking servo

voltage)

11. Turn OFF the power, and remove the lead wire connected at step 1.

RF PLL Free-run Frequency Check

Procedure :

1. Connect the frequency counter to TP (PLCK) of the BD board.

frequency counter

2. Press the

BD board

TP (PLCK)

@/1 button to turn ON the power.

3. Open the front cover, and press the CD PLUS ONE button.

4. Set the disc (YEDS-18) into the “PLUS ONE” slit.

5. Close the front cover, and chuck the disc.

6. Playback the fifth track of the disc.

7. Confirm that reading on frequency counter is 4.3218 MHz ± 30 kHz.

Adjustment Location :

[ BD BOARD ] — CONDUCTOR SIDE —

[ MAIN BOARD ] — COMPONENT SIDE —

IC501

11 1

12 2

CN402

CN301B

CN401

216

115

HCD-M500AV

6-1. BLOCK DIAGRAM – CD SECTION –

OPTICAL PICK-UP

BLOCK

(KSM-213BFN/C2NP)

DETECTOR

VCC

A+5V

Q103

DRIVER

SECTION 6

DIAGRAMS

FOCUS/TRACKING/

SLED/SPINDLE SERVO

RF AMP

IC101

FIN 1

FIN 2

LDD

RF SM

TES

HFL

DIGITAL SIGNAL

PROCESSOR

IC102

44SLI

49DEF

33JP+

32JP-

EFMI

EFMO

DEFI

TES

HFL

JP+

JP-

D OUT

X101

16.9344MHz

A+5V

IC402

VDD

D IN

GND

DIGITAL

OUT

• SIGNAL PATH

:CD

:DIGITAL OUT

FOCUS

COIL

TRACKING

COIL

M102 SLED

MOTOR

M101

SPINDOL

MOTOR

S101

LIMIT

GND

FCS/TRK COIL

SL/SP MOTOR

DRIVER

IC103

F+

T+

V06

V IN 3

V05

V07

V08

V04

V03

V02

V01

V IN 4

V02

V IN 1

MUTE

LDS

SLD

SPD

CLK

TGL

DRF

SLOF

SL+

SL-

CV-

52DATA

35TOFF

Q102

Q101

40CV+

COIN

4.2M

CQCK

RWC

TGL

V/P

CONT2

TOFF

CONT3

CLV+

CLV-

CONT4

L CH

R CH

SFSY

16M

SBCK

SBSY

WRQ

SQOUT

PDO

RESET

R CH

D151

Q471

BUFFER

CD CHANGER

CONTROL

IC401

IIC DATA

IIC CLK

CD TEXT

DECODER

IC104

SBSO

WFCK

MCK

EXCK

SCOR

SRDT

SCLK

13DQSY

6XMODE

X401

10MHz

SRDT

SCLK

DQSY

XMODE

WRQ

SQOUT

XTAL

EXTAL

RESET

A14

SRAM IC411

815

+5V

Q411

RESET

CD L

IIC DATA

IIC CLK

RESET

AMP

SECTION

(Page 25)

MAIN

SECTION

(Page 26)

BD RESET

COIN

COCK

RWC

TGL

DRF

MOTOR DRIVER

IC461

Q464,468

M601

MOTOR

TABLE

MOTOR

M602

OUT1+

OUT1-

OUT2+

OUT2-

R IN 1

F IN 1

R IN 2

F IN 2

MOTOR

CONTROL

Q461,465

MOTOR

CONTROL

Q463,467

MOTOR

CONTROL

Q462,466

MOTOR

CONTROL

SL+

SL-

LD OUT

LD IN

TBL L

TBL R

DOWN SW

TSENS 1

TSENS 2

TSENS 3

UP SW

DOOR SW

42D SENS

Q51 D51

DISC

SENSOR

TABL

SENSOR

IC51-53

S51

(UP)

S52

(DOWN)

S413

(DOOR)

DISC

SENSOR

– MAIN SECTION –

SECTION

(Page 24)

MAIN

SECTION

(Page 26)

MAIN

SECTION

(Page 26)

DVD

INPUT

J01

MD/VIDEO

(AUDIO)

FRONT

REAR

CENTER

WOOFER

REC IN L

TUNER L

J201

CD L

PB L

R CH

Q161,162

MIX

AMP

R CH

IC251

4 5 6

PRO LOGIC PROCESSOR

8 9 27

IC181

SELECTOR

IC201

DATA

SCK REQ

IC501(2/2)

MASTER

CONTROL

6 1011 12

22 23 24

IC101

SOUND PROCESSOR

Q195,196

SWITCH

IC251

Q131

67 69

6566

PL CE

PL CLK

DVD SEL

PL DOUT

Q293

Q292

Q291

SPEANA

MUTE

Q294,295

MUTE

SWITCH

70 71 1

SCL

SDA

MAIN

SECTION

(Page 26)

Q263,

264

MUTE

SWITCH

MUTE REAR

MUTE CENTER

HCD-M500AV

IC141 IC801

31 1126

21 22

TDA DATA

Q141,143 Q145

MUTE

SWITCH

JW815

CONTROL

63 62 75 74 61 68

TDA CLK

DBFB H/N

STK MUTE

DBFB ON/OFF

Q171,172

MUTE

LINE MUTE

MUTE

Q741-743

POWER

AMP

MUTE

IC831(1/3)

IC831(2/3) 15 10

IC831(3/3)

16 18

OVER LOAD

DET.

Q197

SWITCH

Q841

OVER LOAD

DET.

Q842

OVER LOAD

DET.

Q881

OVER LOAD

DET.

Q801

F RELAY

RY731

Q732,733

LATCH

DRIVER

RY771

RY772

Q771,772

LATCH

DRIVER

Q703 Q721

LATCH

DRIVER

PROTECT

DC AMP

PL RELAY

PWR SAVE

CD POWER

27 28

Q751,752

MUTE

SWITCH

PROTECT

SWITCH

Q711,712Q701,702

OVER HEAT

DET.

R CH

JW842

-VP

M+13V

M+7V

A+9V

P+5V

P+5V CD

J801

J103

JK801

FRONT

SPEAKER

M751 (FAN)

REAR

SPEAKER

CENTER

SPEAKER

SUPER

WOOFER

Q921,922

B+

SWITCH

HP801

PHONES

FRONT

REAR

Q931 D836

-30V REG.

IC922

+7V

3 1

REG

Q901-904

+9V

REG

IC921

+5V

3 1

REG

FOR

AMP

FOR

AMP

• R-CH is omitted

• SIGNAL PATH

: CD : AUDIO : PB (DECK A) : PB (DECK B) : REC : MD/VIDEO

+VE

-VE

+VE

-VE

Q991

RELAY

DRIVER

VF2

VF1

D951

D961

D901-904

T991

POWER

TRANSFORMER

RY991

F992

+5.6V

IC931

+5.6V

3 1

REG

D831,832 D931,932

T992

AC IN

+ 57 hidden pages