DXA-WZ5, DXA-WZ50, MHC-WZ5 - Sony Audio Service Manual (repair manual)

AEP Model

UK Model

E Model

Australian Model

• DXA-WZ5 is deck and amplifier

section in MHC-WZ5.

DIN power output (rated): 75 + 75 watts (6 ohms at 

1 kHz, DIN)

Continuous RMS power output (reference):

100 + 100 watts (6 ohms
at 1 kHz, 10% THD)

at

at

1 kHz, 10% THD)

at 1 kHz, 10% THD)

Music power output (reference):

200 + 200 watts (6 ohms

 

The following measured at AC 120, 220, 240 V AC, 
50/60 Hz (Australian model at 240 V AC, 50/60 Hz)
DIN power output (rated): 100 + 100 watts (6 ohms

 

1 kHz, DIN)

Continuous RMS power output (reference):

140 + 140 watts (6 ohms

 

Inputs
MD (VIDEO) IN (phono jacks):

Voltage 450 mV/250 mV, 
impedance 47 kilohms

Outputs
PHONES (stereo mini jack):

Accepts headphones of 
8 ohms or more

MD (VIDEO) OUT (phono jacks):

Voltage 250 mV,
impedance 1 kilohms

FRONT SPEAKER:

Use only the supplied 
speaker SS-WZ5/WZ5E

SUB WOOFER (Except for European model):

Voltage 320mV,
impedance 1 kilohms

Recording system

4-track 2-channel, stereo

Frequency response

50 – 13,000 Hz (

±3 dB), 

using Sony TYPE I 
cassettes

Power requirements
European model:

230 V AC, 50/60 Hz

Australian model:

230 – 240 V AC, 50/60 Hz

TW model:

120 V AC, 50/60 Hz

Other models:

120 V, 220 V or 
230 – 240 V AC, 50/60 Hz
Adjustable with voltage 
selector

Power consumption
European model:

150 watts
0.3 watts (at the Power 
Saving Mode)

Except for European model:

180 watts

Dimensions (w/h/d)
Amplifier/Tape deck:

Amplifier/Tape deck

Approx. 255 

× 135 ×

330 mm

Mass

European model:

Approx. 6.0 kg

Except for European model:

Approx. 6.3 kg

Design and specifications are subject to change 
without notice.

2003D1600-1

© 2003.04

Tape deck

Section

Model Name Using Similar Mechanism

NEW

Tape Transport Mechanism Type

CWM43RR23

2

0

0

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be

damaged by heat.

• 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.

— BACK PANEL —

• Abbreviation

AUS

: Australian model

E2

: 120V AC Area in E model

E3

: 240V AC Area in E model

KR

: Korean model

TW

: Taiwan model

PARTS No.

VOLTAGE SELECTOR Switch

Power Voltage Indication

·········································································· 3

························································· 5

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

································· 9

······································································ 10

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

- MAIN Board (2/2) - ················· 14

4-4. Printed Wiring Board - AMP Board - ·························· 15
4-5. Schematic Diagram - AMP Board - ···························· 16

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

······································· 20

Boards requiring use of unleaded solder are printed with the lead-
free 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.)

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.

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

AEP, UK models

E2 model

E3 model

AUS model

KR model

TW model

4-244-468-0

s

4-244-468-1

s

4-244-468-1

s

4-244-468-3

s

4-244-468-9

s

4-244-468-8

s

AC: 230V

50/60HZ

AC: 120V

60HZ

AC: 240V

50HZ

AC: 230-240V

50/60HZ

AC: 220V

50/60HZ

AC: 120V

50/60HZ

3

This section is extracted
from instruction manual.

Deck A wh

Deck B wd

A Z (eject) wg (15)
Z B (eject) wf (15)

Amplifier Tape deck

4

Perform the following procedures 1 to 5 to hook up your system using the supplied cords and 
accessories. Australian model is used for illustration purpose.

Place the components as shown below.

1

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

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.

2

Connect the speaker cords to the 
SPEAKER terminals on the tape deck and 
to the terminals on the speakers as shown 
below.

Speakers

AM loop antenna

Front 
speaker (right)

Front 
speaker (left)

FM lead antenna

Amplifier/

CD player/
Tuner

Tape deck

Tape deck

CD player/
Tuner

R

L

SPEAKER

Gray (

3

)

Black (

#

)

Gray (

3

)

Black (

#

)

Amplifier/