Sony DXAWZ-8-D Service manual

DXA-WZ8D

Amplifier section European and Russian models:

DIN power output at stereo mode (rated)

75 + 75 watts (6 ohms at

1kHz, DIN) Continuous RMS power output (reference) Front speaker: 100 + 100 watts (6 ohms at

1kHz, 10% THD) Center speaker: 40 watts (6 ohms at 1 kHz,

10% THD) Surround speaker: 40 + 40 watts (6 ohms at

1kHz, 10% THD) Music power output (reference) Front speaker: 200 + 200 watts (6 ohms at

1kHz, 10% THD) Center speaker: 80 watts (6 ohms at 1 kHz,

10% THD) Surround speaker: 80 + 80 watts (6 ohms at

1kHz, 10% THD)

Other models:

The following measured at AC 127, 220, 240 V, 50/60 Hz (Saudi Arabian model only) The following measured at AC 120, 220, 240 V, 50/60 Hz (except for Saudi Arabian model)

DIN power output at stereo mode (rated)

100 + 100 watts (6 ohms at

1kHz, DIN) Continuous RMS power output (reference) Front speaker: 140 + 140 watts (6 ohms at

1kHz, 10% THD)

Center speaker: 40 watts (6 ohms at 1 kHz,

10% THD)

Surround speaker: 40 + 40 watts (6 ohms at

1kHz, 10% THD)

Inputs MD (VIDEO) IN L/R (phono jacks):

Voltage 450 mV/250 mV, impedance 47 kilohms

MIC (phone jack): sensitivity 1 mV,

impedance 10 kilohms Outputs MD (VIDEO) OUT L/R (phono jacks):

Voltage 250 mV,

impedance 1 kilohms SUB WOOFER OUT: Voltage 1 V,

impedance 1 kilohms VIDEO OUT (phono jacks):

max. output level

1 Vp-p, unbalanced, Sync

negative, load impedance

75 ohms S VIDEO OUT (4-pin/mini-DIN jack):

Y: 1 Vp-p, unbalanced,

Sync negative,

C: 0.286 Vp-p,

load impedance 75 ohms COMPONENT VIDEO OUT:

Y: 1 Vp-p, 75 ohms

B/CB

: 0.7 Vp-p, 75 ohms

R/CR

: 0.7 Vp-p, 75 ohms

PHONES (stereo mini jack):

accepts headphones of 8 ohms or more

FRONT L/R: Use only the supplied

speaker SS-WZ8/WZ8E

SURROUND L/R: Use only the supplied

speaker SS-RS400/RS410

CENTER: Use only the supplied

speaker SS-CT400/CT410

Tape deck sect io n

Recording system 4-track 2-channel, stereo Frequency response 50 – 13,000 Hz (±3 dB),

using Sony TYPE I cassettes

General

Power requirements European and Russian models:

230 V AC, 50/60 Hz Australian model: 230 – 240 V AC, 50/60 Hz Saudi Arabian model: 120 – 127 V, 220 V or

230 – 240 V AC, 50/60 Hz

Adjustable with voltage

selector Thai model: 220 V AC, 50/60 Hz Korean model: 220 V AC, 60 Hz

SERVICE MANUAL

Ver 1.0 2003. 06

• DXA-WZ8D is deck and amplifier section in MHC-WZ8D.

Tape deck Section

SPECIFICATIONS

AEP Model

UK Model

E Model

Australian Model

Model Name Using Similar Mechanism DXA-WZ5 Tape Transport Mechanism T ype CWM43RR23

9-877-416-01

Sony Corporation

Home Audio Company Published by Sony Engineering Corporation

STEREO CASSETTE DECK AMPLIFIER

— Continued on next page —

DXA-WZ8D

Other models: 120 V, 220 V or

230 – 240 V AC, 50/60 Hz Adjustable with voltage

selector Power consumption European and Russian models:

235 watts

0.3 watts (in Power Saving

Mode) Other models: 26 0 watts Dimensions (w/h/d) Amplifier/Tape deck: Approx. 255 × 135 ×

330 mm Mass Amplifier/Tape deck: Approx. 8.5 kg Supplied accessories: Remote Commander (1)

Batteries (2)

AM loop antenna (1)

FM lead antenna (1)

Speaker pads (20)

Speaker cords (5)

Video cord (1) Design and specifications are subject to change

without notice.

[When bringing in the equipment for service]

In case of repairing, please bring the entire system set([HCD-WZ5, DXA-WZ5],except for the speaker) to the service station.

1. GENERAL ·········································································· 3

2. DISASSEMBLY ························································· 5

2-1. Case ··············································································· 5 2-2. Switching Power, DC Fan and Back Panel ··················· 6 2-3. TC MAIN Board ··························································· 6 2-4. FRONT AMP Board and SURROUND AMP Board ····7 2-5. Front Panel Assy···························································· 7 2-6. Tape Mechanism Deck (CWM43RR23) ······················· 8 2-7. Lid (TC) Assy, Holder (A) Assy and Holder (B) Assy·· 8

3. ELECTRICAL ADJUSTMENTS ································· 9

4. DIAGRAMS······································································ 10

4-1. Block Diagram ···························································· 11 4-2. Printed Wiring Board – TC MAIN Board – ··············· 12 4-3. Schematic Diagram – TC MAIN Board (1/2) – ······ 13

– TC MAIN Board (2/2) – ······ 14 4-4. Printed Wiring Board – FRONT AMP Board – ········· 15 4-5. Schematic Diagram – FRONT AMP Board – ········· 16 4-6. Printed Wiring Board – SURROUND AMP Board – 15 4-7. Schematic Diagram – SURROUND AMP Board – 16

5. EXPLODED VIEWS

5-1. Front Panel Section ····················································· 17 5-2. Chassis Section ···························································· 18 5-3. Tape Mechanism Deck Section ··································· 19

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.)

: 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 viscous (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 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.

6. ELECTRICAL PARTS LIST······································· 20

MODEL IDENTIFICATION

— BACK PANEL —

VOLTAGE SELECTOR Switch

MODEL

AEP, UK models EA model E2,E3,E15 models AUS model TH model

•Abbreviation AUS: Australian model E2 : 120V AC area in E model E3 : 240V AC area in E model E15 : 220-240V AC area in E model EA : Saudi Arabia model KR : Korean model

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.

PARTS No.

4-244-898-0s 4-244-898-1s 4-244-898-2s 4-244-898-4s 4-244-898-6s

MODEL

KR model MY,SP models RU model PH model

PARTS No.

4-244-898-7s 4-244-898-8s 4-244-898-9s 4-247-937-0s

MY : Malaysia model PH : Philippines model RU : Russian model SP : Singapore model TH : Thai model

Main unit

SECTION 1

GENERAL

DXA-WZ8D

This section is extracted from instruction manual.

ALPHABETICAL ORDER

A – L

Deck A wl Deck B wh

BUTTON DESCRIPTIONS

A Z (eject) wk (39) Z B (eject ) wj (39)

Amplifier/Tape deck

DXA-WZ8D

Getting Started

Hooking up the system

Perform the following procedures 1 to 7 to hook up your system using the suppli ed cords and accessories. European model is used for illustration purpose.

AM loop antenna

FM lead antenna

CD/DVD player/Tuner Amplifier/Tape deck

To front speaker (right) To surround speaker (right) To surround speaker (left)

Preparation

Place the components as shown below.

Amplifier/ Tape deck

CD/DVD player/ Tuner

To center speaker

To front speaker (left)

Note

The system cable is used to send signals and electricity between the components for interlinked operation.

Be sure to insert the connector horizontally until it clicks into place. Otherwise the system will not operate correctly.

1 Connect the system control cables to

the SYSTEM CONTROL connectors on the tape deck.

Connect to the same numbered jack in the order indicated on the rear panel.

2 Connect the speakers.

Be sure to match the appropriate speaker cords from the speaker terminals to the corresponding SPEAKER terminals on the tape deck.

SECTION 2

)

DISASSEMBLY

•The equipment can be removed using the following procedure.

SET

CASE

DXA-WZ8D

SWITCHING POWER, DC FAN

TC MAIN BOARD

FRONT AMP BOARD, SURROUND AMP BOARD

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

2-1. Case

case

two screws

(case 3 TP2)

FRONT PANEL ASSY

TAPE MECHANISM DECK (CWM43RR23)

LID (TC) ASSY, HOLDER (A) ASSY, HOLDER (B) ASSY

three screws (+BVTP 3

two screws

(case 3 TP2)

DXA-WZ8D

)

2-2. Switching Power, DC Fan and Back Panel

connector

(CN204)

back panel

DC fan

connector

(CN201)

two screws (+BVTP 3

five screws (+BVTP 3

switching power

connector

(CN101)

five screws (+BVTP 3

2-3. TC MAIN Board

connector

(CN502)

connector

(CN501)

wire (flat type) (13 core)

lead with connector

connector

(CN301)

(CN701)

connector

(CN401)

connector

(CN204)

two screws (+BVTP 3

three screws (+BVTP 3 × 8)

MAIN board

connector

(CN201)

connector

(CN101)

five screws (+BVTP 3

connector

(CN302)

(CN605)

connector

(CN102)

connector

(CN604)

2-4. FRONT AMP Board and SURROUND AMP Board

Remove the soldering.

two screws

FRONT

(+BVTP 3

AMP board

Remove the soldering.

two screws (+BVTP 3 × 8)

SURROUND

DXA-WZ8D

AMP board

2-5. Front Panel Assy

front panel assy

lead with connector

connector

claw

wire (flat type) (13 core)

two screws (+BVTP 3

DXA-WZ8D

)

2-6. Tape Mechanism Deck (CWM43RR23)

holder (lock)

button (A)

lever (L)

two screws (+BVTP 2.6

button (B)

tape

mechanism deck (CWM43RR23)

four claws

lever (R)

lever (C)

base lock

four screws (+BVTP 2.6

2-7. Lid (TC) Assy, Holder (A) Assy and Holder (B) Assy

holder (A) assy

spring holder (A)

claw

damper

holder (B) assy

damper

claw

spring (lid)

lid (TC) assy

spring (lid-R)

spring holder (B)

SECTION 3

)

ELECTRICAL ADJUSTMENTS

DXA-WZ8D

DECK SECTION

Note: Confirm each contents of this section first of all. If the results are

not satisfied, do the adjustment.

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.

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-A63J 10 kHz, –10 dB Azimuth Adjustment

Record/Playback Head Azimuth Adjustment

Procedure:

1. Mode: Playback

3. Mode: Playback

test tape P-4-A63J (10 kHz, –10 dB)

L-CH

set

R-CH

in phase 45°90°135°180

SPEAKER terminals (TM401 L-CH

R-CH

waveform of oscilloscope

good

oscilloscope

wrong

4. Repeat step 1 to 3 in playback (REV) mode.

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

test tape P-4-A63J (10 kHz, –10 dB)

SPEAKER terminals (TM402) L-CH, R-CH

level meter

set

+ –

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 1 dB

L-CH peak

R-CH peak

within 1 dB

Screw position

L-CH peak

Screw position

R-CH peak

+ 19 hidden pages

Sony DXAWZ-8-D Service manual

TABLE OF CONTENTS

GENERAL

DISASSEMBLY

2-1. Case

2-2. Switching Power, DC Fan and Back Panel

2-3. TC MAIN Board

2-4. FRONT AMP Board and SURROUND AMP Board

2-5. Front Panel Assy

2-6. Tape Mechanism Deck (CWM43RR23)

2-7. Lid (TC) Assy, Holder (A) Assy and Holder (B) Assy

ELECTRICAL ADJUSTMENTS