Sony HCD-NEZ3, HCD-NEZ5 Service Manual

HCD-NEZ3/NEZ5

Main unit

AUDIO POWER SPECIFICATIONS POWER OUTPUT AND TOTAL HARMONIC

DISTORTION: (The United States model only)

CMT-NEZ5

With 6 ohm loads, both channels driven, from 120 − 10,000 Hz; rated 18 watts per channel minimum RMS power, with no more than 10% total harmonic distortion from 250 milliwatts to rated output.

CMT-NEZ3

With 6 ohm loads, both channels driven, from 120 − 10,000 Hz; rated 9 watts per channel minimum RMS power, with no more than 10% total harmonic distortion from 250 milliwatts to rated output.

Amplifier section CMT-NEZ5

European model: DIN power output (rated): 18 + 18 W (6 ohms at

1kHz, DIN)

Continuous RMS power output (reference):

25 + 25W (6 ohms at 1kHz, 10% THD)

Music power output (reference):

38 + 38 W

Pan-American model: Continuous RMS power output (reference):

20 + 20 W (6 ohms at

1kHz, 10% THD) Other models: The following measured at AC 120, 220 or 240 V, 50/60 Hz DIN power output (rated): 14 + 14 W (6 ohms at

1kHz, DIN) Continuous RMS power output (reference):

20 + 20 W (6 ohms at

1kHz, 10% THD) Inputs AUDIO IN: Sensitivity 250 mV,

impedance 47 kilohms Outputs PHONES: Accepts headphones with

an impedance of 8 ohms or

more SPEAKER: Accepts impedance of 6 to

16 ohms.

CMT-NEZ3

North-American model: Continuous RMS power output (reference):

10 + 10 W (6 ohms at

1kHz, 10% THD)

European model: DIN power output (rated): 11 + 11 W (6 ohms at

1kHz, DIN)

Continuous RMS power output (reference):

15 + 15 W (6 ohms at 1kHz, 10% THD)

Music power output (reference):

28 + 28 W

Other models: The following measured at AC 120, 220 or 240 V, 50/60 Hz DIN power output (rated): 11 + 11 W (6 ohms at

1kHz, DIN)

Continuous RMS power output (reference):

15 + 15 W (6 ohms at 1kHz, 10% THD)

Inputs AUDIO IN: Sensitivity 250 mV,

impedance 47 kilohms Outputs PHONES: Accepts headphones with

an impedance of 8 ohms or

more SPEAKER: Accepts impedance of 6 to

16 ohms.

SERVICE MANUAL

Ver. 1.0 2005.03

• HCD-NEZ3 is the amplifier, CD player, tape deck and tuner section in CMT-NEZ3.

• HCD-NEZ5 is the amplifier, CD player, tape deck and tuner section in CMT-NEZ5.

CD Section Base Unit Name BU-K7BD81D-G

TAPE Section

Photo: HCD-NEZ5

Model Name Using Similar Mechanism NEW

Optical Pick-up Name KSM-213EDP Model Name Using Similar Mechanism NEW Tape Transport Mechanism Type CMAL5Z231

US Model

Australian Model

HCD-NEZ3

Canadian Model

AEP Model

UK Model

E Model

HCD-NEZ3/NEZ5

9-879-528-01

Sony Corporation

Personal Audio Group Published by Sony Engineering Corporation

SPECIFICATIONS

COMPACT DISC DECK RECEIVER

– Continued on next page –

HCD-NEZ3/NEZ5

CD player section

Laser Diode Properties Emission duration:

Frequency response 20 Hz − 20 kHz

Tape deck section

Recording system 4-track 2-channel, stereo

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 ohms unbalanced Intermediate frequency 10.7 MHz

AM tuner section

Tuning range Pan-American model: 530 − 1,710 kHz

continuous Laser Output: Less than

44.6 µW (This output is the value measurement at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture)

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

(with the tuning interval set at 9 kHz)

European model: 531 − 1,602 kHz

Other models: 530 − 1,710 kHz

Antenna AM loop antenna, external

Intermediate frequency 450 kHz

General

Power requirements North American model: AC 120 V, 60 Hz Mexican model: AC 120 V, 60 Hz European model: AC 230 V, 50/60 Hz Australian model: AC 230 − 240 V, 50/60 Hz Korean model: AC 220 V, 60 Hz Chinese model: AC 220 V, 50/60 Hz Taiwanese model: AC 120 V, 50/60 Hz Argentine model AC 220 V, 50/60 Hz Saudi Arabian model: AC 120 − 127, 220,

Other models: AC 120, 220 or

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.

CAUTION

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

(with the tuning interval set at 9 kHz)

(with the tuning interval set at 10 kHz) 531 − 1,602 kHz (with the tuning interval set at 9 kHz)

antenna terminal

230 − 240 V, 50/60 Hz

230 − 240 V, 50/60 Hz Adjustable with voltage selector

Power consumption CMT-NEZ5 European model: 60 W

0.3 W (in Power Saving Mode)

Other models: 50 W

CMT-NEZ3 North American model: 40 W European model: 45 W

0.3 W (in Power Saving Mode)

Other models: 45 W

Dimensions (w/h/d) (excl. speakers)

Approx. 164 × 235 × 265 mm

Mass (excl. speakers) CMT-NEZ5: Approx. 3.6 kg CMT-NEZ3 North American model: Approx. 2.8 kg Other models: Approx. 3.6 kg

Design and specifications are subject to change without notice.

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. 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 2 V AC range are suitable. (See Fig. A)

The following caution label is located inside the unit.

This appliance is classified

CLASS 1 LASER PRODUCT LUOKAN 1 LASER LAITE KLASS 1 LASER APPARAT

as a CLASS 1 LASER product.

This label is located on the rear exterior.

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.

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.

To Exposed Metal Parts on Set

0.15 µF

1.5 k

Ω

voltmete (0.75 V)

Earth Ground

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

ATTENTION AU COMPOSANT AYANT RAPPORT

LES COMPOSANTS IDENTIFIÉS P AR UNE MARQ UE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU D ANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

À LA SÉCURITÉ!

1. SERVICING NOTES ............................................... 4

2. GENERAL ................................................................... 6

3. DISASSEMBLY

3-1. Disassembly Flow ........................................................... 8

3-2. Cabinet ............................................................................. 8

3-3. Cabinet (Top) Section...................................................... 9

3-4. Base Unit (BU-K7BD81D-G) ......................................... 9

3-5. Front Panel Section ......................................................... 10

3-6. Mechanical Deck (CMAL5Z231) ................................... 10

3-7. MAIN Board .................................................................... 11

3-8. Tuner Unit ....................................................................... 11

4. TEST MODE.............................................................. 12

5. MECHANICAL ADJUSTMENTS ....................... 13

6. ELECTRICAL ADJUSTMENTS ......................... 13

HCD-NEZ3/NEZ5

7. DIAGRAMS

7-1. Block Diagram – CD SERVO Section – ......................... 15

7-2. Block Diagram – MAIN Section – .................................. 16

7-3. Printed Wiring Board – CD Board – ............................... 18

7-4. Schematic Diagram – CD Board – .................................. 19

7-5. Printed Wiring Boards – MAIN Section – ...................... 21

7-6. Schematic Diagram – MAIN Section (1/2) – .................. 22

7-7. Schematic Diagram – MAIN Section (2/2) – .................. 23

7-8. Printed Wiring Board – PANEL Board – ........................ 24

7-9. Schematic Diagram – PANEL Board – ........................... 25

7-10. Printed Wiring Boards – DC Section – ........................... 26

7-11. Printed Wiring Board – AC Board – ................................ 27

7-12. Schematic Diagram – POWER SUPPLY Section – ........ 28

8. EXPLODED VIEWS

8-1. Cabinet Section ................................................................ 35

8-2. Mechanical Deck Section ................................................ 36

8-3. Panel Board Section ........................................................ 37

8-4. Cabinet (Top) Section...................................................... 38

8-5. MAIN Board Section ....................................................... 39

8-6. AC Board, DC Board Section ......................................... 40

9. ELECTRICAL PARTS LIST................................ 41

HCD-NEZ3/NEZ5

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.

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 ˚C higher

than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350 ˚C. Caution: The printed pattern (copper foil) may peel away if

the heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscou-s (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder.

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.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

• MODEL IDENTIFICATION – Rear Cabinet –

Power Voltage Indication

LASER DIODE AND FOCUS SEARCH OPERATION CHECK

During normal operation of the equipment, emission of the laser diode is prohibited unless the upper lid is closed while turning ON the S1820. (push switch type) The following checking method for the laser diode is operable.

• Method

Emission of the laser diode is visually checked.

1. Open the upper lid.

2. Push the S1820 as shown in Fig.1.

Note: Do not push the detection lever strongly , or it may be bent or damaged.

3. Press the u button.

4. Check the object lens for confirming normal emission of the laser diode. If not emitting, there is a trouble in the automatic power control circuit or the optical pick-up. In this operation, the object lens will move up and down 2 times along with inward motion for the focus search.

S1820

MODEL Power Voltage Incdication

NEZ3: US, CND AC: 120 V 60 Hz 40 W

NEZ3: AEP, UK AC: 230 V - 50/60 Hz 45 W

NEZ3: E, E51, SP

NEZ3: EA

NEZ3: MX ca - 120 V 60 Hz 45 W NEZ3: TW AC: 120 V - 50/60 Hz 45 W

NEZ3: AR ca - 220 V 50/60 Hz 45 W NEZ3: KR AC: 220 V - 60 Hz 45 W

NEZ3: AUS AC: 230 − 240 V - 50/60 Hz 45 W NEZ5: CND AC: 120 V 60 Hz 50 W

NEZ5: AEP, UK AC: 230 V - 50/60 Hz 60 W

NEZ5: E, E51, SP

NEZ5: MX ca - 120 V 60 Hz 50 W NEZ5: TW AC: 120 V - 50/60 Hz 50 W

NEZ5: AR ca - 220 V 50/60 Hz 50 W NEZ5: KR AC: 220 V - 60 Hz 50 W

• Abbreviation

AR : Argentina model AUS: Australian model CND: Canadian model E51 : Chilean and Peruvian model EA : Saudi Arabia model

AC: 120 V/220 V/230 − 240 V

- 50/60 Hz 45 W

AC: 120 − 127 V/220 V/230 − 240 V

- 50/60 Hz 45 W

AC: 120 V/220 V/230 − 240 V

- 50/60 Hz 50 W

KR : Korean model MX : Mexican model SP : Singapore model TW : Taiwan model

Fig.1 Method to push the S1820

SERVICE POSITION

– CD BOARD –

HCD-NEZ3/NEZ5

CD board

– TAPE MECHANICAL DECK –

cabinet (top) section

tape mechanical dec

HCD-NEZ3/NEZ5

12 3 45 6 7

Main unit

ALPHABETICAL ORDER

A – S T – Z

CD SYNC qk Display window 6 DSGX 3 PHONES jack qd PLAY MODE 5 Remote sensor 2

SECTION 2

GENERAL

Tape deck qs TUNER/BAND qg TUNING +/− q; TUNING MODE 5 VOLUME control 9

This section is extracted from instruction manual.

BUTTON DESCRIPTIONS

?/1 (power) 1 z PAUSE/START 4 Z PUSH OPEN/CLOSE (CD

open/close) 7

+/− 8*

.m/M> (rewind/fast

forward, go back/go forward) 0

PUSH OPEN/CLOSE Z (tape

open/close) qa

x (stop) qf CD/NX (play) qh TAPE/N qj *Except for North American

model CMT-NEZ3

qk qj

0 qa

Remote control

HCD-NEZ3/NEZ5

ALPHABETICAL ORDER

A – O

CD qh CLEAR qd CLOCK/TIMER SELECT 2 CLOCK/TIMER SET 3

DISPLAY ql ENTER 9 EQ qs FM MODE 4 FUNCTION 6

P – Z

PLAY MODE qk REPEAT 4 SLEEP w; TAPE qg TUNER/BAND 5 TUNER MEMORY qj TUNING MODE qk VOLUME +/− q;

ql qk qj qh qg

qd qs

BUTTON DESCRIPTIONS

?/1 (power) 1 m/M (rewind/fast forward)

N (play) 8 X (pause) 8 x (stop) 8

+/− qa

./> (go back/go forward)

−/+ (tuning) qf

2 3 4

5 6

7 8

9 0

Setting the clock

Use buttons on the remote for the operation.

Press ?/1 to turn on the unit.

Press CLOCK/TIMER SET.

Press . or > repeatedly to set the hour.

Press ENTER.

Press . or > repeatedly to set the minute.

Press ENTER.

The clock starts working.

To adjust the clock

Press CLOCK/TIMER SET.

Press . or > repeatedly to select “CLOCK”, then press ENTER.

Do the same procedures as step 3 to 6 above.

Note

The clock is not displayed in Power Saving Mode.

HCD-NEZ3/NEZ5

)

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

3-1. DISASSEMBLY FLOW

SET

3-2. CABINET

(Page 8)

3-3. CABINET (TOP) SECTION

(Page 9)

SECTION 3

DISASSEMBLY

3-5. FRONT PANEL SECTION

(Page 10)

3-6. MECHANICAL DECK (CMAL5Z231)

(Page 10)

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

3-2. CABINET

fan motor connector

(HCD-NEZ5)

(CN313)

3-4. BASE UNIT (BU-K7BD81D-G)

(Page 9)

3-7. MAIN BOARD

(Page 11)

3-8. TUNER UNIT

(Page 11)

two

screws

(BVTP 3

10)

cabinet

two

(BVTP 3

three

(BVTP 3

screws

3-3. CABINET (TOP) SECTION

)

screw

(BVTP 2.6

connector

(S1820)

claw

cabinet (top) section

wire (flat type) (27 core

(CN317)

HCD-NEZ3/NEZ5

3-4. BASE UNIT (BU-K7BD81D-G)

screw

(BVTP 2.6

claw

four

screws

(PWH 2.6

10)

base unit

(BU-K7BD81D-G)

wire (flat type) (27 core)

(CN201)

HCD-NEZ3/NEZ5

)

3-5. FRONT PANEL SECTION

wire (flat type) (9 core) (FFC1803)

(CN900)

front panel section

connector

(CN301)

wire (flat type) (13 core) (FFC1804) (except NEZ5: AEP, UK models) wire (flat type) (15 core) (FFC1804) (NEZ5: AEP, UK models) (CN320)

wire (flat type) (19 core) (FFC1805)

(CN321)

wire (flat type) (13 core) (FFC501)

(CN500)

four

screws

(BVTP 3

3-6. MECHANICAL DECK (CMAL5Z231)

wire (flat type) (7 core) (FFC1801)

three

(BVTP 2.6

screws

screw

(BVTP 2.6

terminal lead wire (WIRE200)

mechanical deck (CMAL5Z231)

3-7. MAIN BOARD

)

two connectors (CN314, CN318)

HCD-NEZ3/NEZ5

wire (flat type) (11 core) (except NEZ5: AEP, UK models wire (flat type) (15 core) (NEZ5: AEP, UK models) (CN319)

screw (BVTP 3

MAIN board

3-8. TUNER UNIT

wire (flat type) (11 core) (except NEZ5: AEP, UK models) wire (flat type) (15 core) (NEZ5: AEP, UK models)

AC board, DC board section

two

screws

(BVTT 3

terminal lead wire (WIRE900)

three

(BVTT 3

(CN901)

screws

power cord connecto

tuner unit

two

screws

(BVTP 3

HCD-NEZ3/NEZ5

SECTION 4

TEST MODE

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. While pressing the x button, press the I/1 button and turn the [VOLUME] knob in the counter-clock wise.

3. The message “RESET” is displayed and the set is reset.

PANEL TEST

* All segments of liquid crystal display are tested, and the version

and released date of the micro computer are displayed.

Procedure:

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

2. While pressing the [DSGX] button, press the l m button and turn the [VOLUME] knob in the counter-clock wise. Then all segments of liquid crystal display are turned on.

3. Press the [DSGX] button, the version and released date of the micro computer are displayed.

example of display:

1119 V006

Version of micro computer (In this case, version 006)

released date of micro computer (In this case, released of November 19)

CD ERROR HISTORY

*This mode can be used for CD error history display.

Procedure:

1. Set the FUNCTION to CD.

2. While pressing the [DSGX] button, press the CD u button and turn the [VOLUME] knob in the counter-clock wise.

3. CD error history is displayed on the liquid crystal display. Each time l m or M L button is pressed, CD error history is changed.

CD POWER MANEGE

*This mode is for switch the CD power supply on/off. Even if

this state pulls out AC plug, it is held.

Procedure:

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

2. Set the FUNCTION to CD.

3. Press the I/1 button again to turn the power off (standby).

4. While pressing the CD u button, press the I/1 button.

5. If turns power on and display “CD POWER”, then display “ON” or “OFF”.

4. Press the [TUNER/BAND] button, the model name and distination are displayed.

example of display:

NE ASIA2

distination (In this case, Asian model)

model name (In this case, HCD-NEZXX)

5. Press the [PLAY MODE/TUNING MODE] button, “KEY 0 0” is displayed on the liquid crystal display, and key test mode in. Each time a key is pressed, the numerical value corresponding to each key is displayed on the liquid crystal display.

6. To exit from this mode, perform the “COLD RESET”.

TUNER STEP CHANGE-OVER

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

AM channel step.

Procedure:

1. Set the FUNCTION to AM, and press the the power off.

2. While depressing the [TUNER/BAND] button, press the I/1 button.

3. The message “9K STEP” or “10K STEP” is displayed on the liquid crystal display, and thus the channel step is changed over.

I/1 button to turn

SECTION 5

MECHANICAL ADJUSTMENTS

HCD-NEZ3/NEZ5

SECTION 6

ELECTRICAL ADJUSTMENTS

• Precaution

1. Clean the following parts with a denatured-alcohol-moistened swab :

record/playback head pinch roller erase head rubber belts capstan idlers

2. Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head magnetizer close to the erase head.)

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

4. After the adjustments, appiy 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 Torque Meter Meter Reading

2.95 – 6.86 mN⋅m

FWD CQ-102C (30 – 70 g⋅cm)

(0.42 – 0.97 oz⋅inch)

FWD

Back Tension

FF CQ-201B (more than 60 g⋅cm)

REW CQ-201B (more than 60 g⋅cm)

CQ-102C (1.5 – 5.5 g⋅cm)

0.15 – 5.39 mN⋅m

(0.021 – 0.076 oz⋅inch)

more than 5.89 mN⋅m

(more than 0.83 oz⋅inch)

more than 5.89 mN⋅m

(more than 0.83 oz⋅inch)

0 dB=0.775 VDECK SECTION

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

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

• Test T ape

Tape Signal Used for

P-4-A063 6.3 kHz, -10 dB Azimuth Adjustment

RECORD/PLA YBA CK HEAD AZIMUTH ADJUSTMENT

Note: Remove the cover (azimuth) before this adjustment.

• Tape T ension Measurement

Mode Tension Meter Meter Reading

FWD CQ-403A

more than 100 g

(more than 3.53 oz)

Procedure:

1. Mode: Playback

test tape P-4-A063 (6.3 kHz, –10 dB)

HEAD PHONE board PHONES jack (J500)

set

level mete

+ –

HCD-NEZ3/NEZ5

+ –

CD board

TP (RFACO) TP (VC)

oscilloscope

(DC range)

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 1dB 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-A063 (6.3 kHz, –10 dB)

HEAD PHONE board PHONES jack (J500)

set

oscilloscope

CD SECTION

Note:

1. CD Block is basically constructed to operate without adjustment.

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.

5. Check the focus bias check when optical block is replaced.

FOCUS BIAS CHECK

Procedure :

1. Connect the oscilloscope to TP (RF ACO) and TP (VC) on the CD board.

2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)

3. Press the CD u button.

4. Confirm that the oscilloscope waveform is as shown in the

figure below. (eye pattern) A good eye pattern means that the diamond shape (‡) in the center of the waveform can be clearly distinguished.

waveform of oscilloscope

in phase 45°90°135°180

good

wrong

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

Adjustment Location: Record/Playback/Erase Head

• RF signal reference waveform (eye pattern)

VOLT/DIV: 0.2 V (with the 10: 1 probe in use.) TIME/DIV: 500 ns

1.1

0.2 Vp-p

When observing the eye pattern, set the oscilloscope for AC range and raise vertical sensitivity.

Checking Location:

– CD BOARD (Conductor Side) –

TP (VC)

(RFACO)

SECTION 7

DIAGRAMS

7-1. BLOCK DIAGRAM – CD SERVO Section –

HCD-NEZ3/NEZ5

DETECTOR

OPTICAL PICK-UP

BLOCK

(KSM-213EDP)

LASER DIODE

M101

(SPINDLE)

I-V AMP

D +3.3V

AUTOMATIC

POWER

CONTROL

Q10

CH4OUTF

CH4OUTR

MOTOR/COIL DRIVE

IC251

MOTOR

DRIVE

CH4IN

SUMMING

AMP

FOCUS ERROR

TRACKING

ERROR AMP

APC LD

AMP

FILTER

CD DSP

IC101 (1/2)

AC_

SUM

FEO

TEO

OPIN+

OPOUT

EQ_

RFAC

VCA

RFACO

45 46

RFACI

ASYI ASYO

DIGITAL

CLV

PROCESSOR

MDP

ASYMMETRY

CORRECTOR

100

XRST

51 53

FILI

PCO

FILO

CLTV

DIGITAL PLL

TO SERVO AUTO

SEQUENCER

CPU INTERFACE

DATA

CLOCK

XLAT

33 68

XLT

CDCLK

CDDATA

1125052

XPCK

DEMODULATOR

SUBCODE

PROCESSOR

SQSO

EXCK

SCOR

SENS

SBSO

96 97

98 99115107102 105 104 110 111

SENS

CD SCOR

EFM

SQCK

MP3DI

MP3DO

MP3CLK

MICS MILP

MIACK MP3REQ MP3STB MP3RST

32K

RAM

INTERNAL BUS

WFCK

XUGF

GFS

113

29 30 28 73 70 72 69 71 75

CORRECTOR

EMPH

MIDIO

MICK

MICS

MILP

MIACK

PO11/BUCK/AD14

STANDBY

RESET

ERROR

MP3 DECODER

IC301

D/A

DIGITAL

INTERFACE

117 93

C4M

SELECTOR

LRCK

63 66 65

18 14

SBSY/BCKIB

SFSY/LRCKIB

D/A

CONVERTER

BCK

PCMD

SDI0

BCKIA

LRCKIA

XTSL

CLOCK

GENERATOR

LRCKI

BCKI

62 60 61

PCMDI

1132 19

SDO0

XTAO

XTAI

XTACN

AOUT1

AOUT2

77 78

R-CH

X171

16.9344MHz

(Page 16)

M102

(SLED)

2-AXIS

DEVICE

(TRACKING)

(FOCUS)

17 18

14 13

12 11

CH3OUTF CH3OUTR

CH1OUTF CH1OUTR

CH2OUTF CH2OUTR

MOTOR

DRIVE

COIL

DRIVE

COIL

DRIVE

MUTE

CH3FIN

CH3RIN

CH1FIN

CH1RIN

CH2FIN

CH2RIN

21 23

CD DSP

IC101 (2/2)

SFDR

SRDR

4 5

6 7

TFDR

TRDR

FFDR

FRDR

PWM GENERATOR

FOCUS/TRACKING/SLED

S101

(LIMIT)

FEI

TEI

A/D

CONVERTER

FOCUS/

TRACKING/SLED

SERVO DSP

SSTP

MIRR,

DFCT, FOK

DETECTOR

SERVO

INTERFACE

SERVO AUTO

SEQUENCER

TO CPU INTERFACE

FOK

MIRR

DFCT

COUT SCLK

SYSTEM CONTROLLER

IC1801 (1/2)

3 1 2

119 108

XRST

XTCN

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH : CD PLAY

HCD-NEZ3/NEZ5

1515

HCD-NEZ3/NEZ5

7-2. BLOCK DIAGRAM – MAIN Section –

(Page 15)

ANTENNA

FM 75Ω

COAXIAL

HRPE301

(REC/PB/ERASE)

J321

AUDIO IN

FM ANT

ANT GND

AM ANT

ANT GND

L-CH

R-CH R-CH

ERASE

TUNER UNIT

L OUT

R OUT

ST DIN

ST DOUT

ST CLK

TUNED

STEREO

ST MUTE

RDS DATA

RDS INT

(NEZ5: AEP, UK)

ST CE

Q326 – 332

REC/PB

SWITCH

R-CH

CLK

TUNED

STEREO

TU-MUTING

RDS DATA

RDS CLOCK

AUX-L

OUT-L

CD-L

R-CH

POWER

AMP

IC501

J500

PHONES

ST-L

TC-L

INPUT SELECT,

ELECTRICAL VOLUME

IC302

REC BIAS

SWITCH

Q347, 348

M +10V

CONT

RECO-L

(NEZ5)

D320

DETECT

Q342, 343

D307

D313

– +

–

FAN MOTOR

DRIVE

Q316, 317

J302

SPEAKER IMPEDANCE USE 6 – 16Ω

M301 (FAN)

• R-ch is omitted due to same as L-ch.

• SIGNAL PATH : TUNER : CD PLAY : TAPE PLAY : REC

: AUX IN

MAIN POWER

TRANSFORMER

T902

D920, 936

BIAS OSC

T301

BIAS OSC

Q344

(NEZ5: AEP, UK)

DETECT

Q333, 338

POWER AMP

AMP B+

AMP B–

RECT

D918, 919

RECT

D916, 917

TAPE MECHANISM

DECK BLOCK

MOTOR

10V

(CAPSTAN/REEL)

(DECK-A)

PLAY SW

END SW

SOL 10V

PACK

REC

CAPSTAN/REEL

MOTOR DRIVE

Q1804, 1805

PLUNGER

DRIVE

Q1802, 1803

LCD1801

LIQUID CRYSTAL DISPLAY

REMOTE CONTROL

RECEIVER

IC1802

TCMOTOR

S0L

TC HARF/REC

TCPLAY

ENDSW

LCDDATA

LCDCLK

SIRCS

CLK

DOUT

STDIN

STCLK

LED DRIVE

D1804, 1805

(LCD BACK LIGHT)

TUNED

STCE

Q1808

STEREO

TU-MUTING

TUNED

STEREO

STMUTE

BACKLIGHT

RDS DATA

RDS CLOCK

RDS INT

RDSDATA

LED DRIVE

Q1806

D1806

STANDBY

STBYLED

BIAS

REC/PB

SYSTEM CONTROLLER

IC1801 (2/2)

(CD LID OPEN/CLOSE DETECT)

VOLUME

S1801 – 1813

(FRONT PANEL KEYS)

FDATA

X1801

32.768kHz

11 10

XT2

S820

ROTARY

ENCODER

RV1801

15 13

XT1

X1802 10MHz

CF2

CF1

AMPSTBY

AMPMUTE

77 CD OPEN

97 VOL ENCORDER

74 KEYWAKEUP

KEY0, KEY1

90, 89

CD +1.5V

I POWER MONITOR

65CDON

20ACCUT

12RESET

6POWER ON

REGULATOR

(NEZ5: AEP, UK)

RESET

SWITCH

Q1801

+1.5V

IC303

D +3.3V

RDS +3.3V

D +4V

SYS +3.3V

VOLTAGE

DETECT

IC1803

LCD +3.3V

LCD +4V

B+ SWITCH

Q300, 301

AC DETECT

Q1807

B+ SWITCH

Q1809 – 1811

M +7V

M +10V

A +9V

+3.3V

REGULATOR

D305

D1898

D1809

+7V

REGULATOR

Q320, 321

+10V

REGULATOR

IC900

+9V

REGULATOR

IC902

+4V

REGULATOR

IC901

+4V

REGULATOR

IC903

RECT

D911 – 914

RECT

D907 – 910

D922, 923

SUB POWER

TRANSFORMER

T901

• Abbreviation E51 : Chilean and Peruvian EA : Saudi Arabia SP : Singapore

(EXCEPT E, E51, EA, SP)

(E, E51, EA, SP)

VOLTAGE

SELECTOR

S901

(EXCEPT E, E51, EA, SP)

MAIN POWER RELAY DRIVE

Q311, 315

RY901

(AC IN)

HCD-NEZ3/NEZ5

1616

+ 36 hidden pages

Sony HCD-NEZ3, HCD-NEZ5 Service Manual

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

3-1. DISASSEMBLY FLOW

3-2. CABINET

DISASSEMBLY

3-3. CABINET (TOP) SECTION

3-4. BASE UNIT (BU-K7BD81D-G)

3-5. FRONT PANEL SECTION

3-6. MECHANICAL DECK (CMAL5Z231)

3-7. MAIN BOARD

3-8. TUNER UNIT

TEST MODE

MECHANICAL ADJUSTMENTS

ELECTRICAL ADJUSTMENTS

DIAGRAMS

7-1. BLOCK DIAGRAM – CD SERVO Section –

7-2. BLOCK DIAGRAM – MAIN Section –