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SERVICE MANUAL
Ver. 1.0 2005.03
MICRO HI-FI COMPONENT SYSTEM
· CMT-NEZ3/NEZ5 are composed of the following models.
As service manuals are issued for each component model, please refer to them.
CMT-NEZ3/NEZ5
SPECIFICATIONS
COMPONENT MODEL NAME
CMT-NEZ3
CMT-NEZ5
Compact Disc Deck Receiver
HCD-NEZ3
HCD-NEZ5
Speaker System
SS-CNEZ3
SS-CNEZ5
9-879-530-01
2005C05-1
© 2005.03
Sony Corporation
Personal Audio Group
Published by Sony Engineering Corporation
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, 230 - 240 V, 50/60 Hz
Other models:
AC 120, 220 or 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 × 265mm
Mass (excl. speakers)
CMT-NEZ5:
Approx. 3.6 kg
CMT-NEZ3
North American model:
Approx. 2.8 kg
Other models:
Approx. 3.6 kg
Supplied accessories
Remote Commander (1)
R6 (size AA) batteries (2)
AM loop antenna (1)
FM lead antenna (1)
Design and specifications are subject to change without notice.
US Model
Australian Model
CMT-CNEZ3
Canadian Model
AEP Model
UK Model
E Model
CMT-CNEZ3/CNEZ5
· Abbreviation
AR
: Argentina model
AUS: Australian model
CND : Canadian model
E51 : Chirean and Peruvian models
EA
: Saudi Arabia model
EE
: East European model
KR
: Korean model
MX : Mexican model
RU
: Russian model
SP
: Singapore model
TW : Taiwan model
1-754-102-31 ANTENNA, LOOP (LW.MW)
1-754-243-11 ANTENNA (FM)
2-055-382-01 BATTERY COVER (for RM-SC30)
2-582-894-11 MANUAL, INSTRUCTION (ENGLISH) (US, CND, AEP, UK, E,
TW, AR, SP, EA, E51, AUS)
2-582-894-21 MANUAL, INSTRUCTION (FRENCH) (CND, AEP, E, SP, EA)
2-582-894-31 MANUAL, INSTRUCTION (SPANISH)
(AEP, E, AR, MX, SP, E51)
2-582-894-41 MANUAL, INSTRUCTION (GERMAN, DUTCH) (AEP)
2-582-894-51 MANUAL, INSTRUCTION (ITALIAN, PORTUGUESE) (AEP)
2-582-894-61 MANUAL, INSTRUCTION (SWEDISH, DANISH, FINNISH)
(EE, RU)
2-582-894-71 MANUAL, INSTRUCTION (POLISH, CZECH, HUNGARIAN)
(EE, RU)
2-582-894-81 MANUAL, INSTRUCTION (GREEK, RUSSIAN) (EE, RU)
2-582-894-91 MANUAL, INSTRUCTION (ARABIC) (EA)
2-582-896-11 MANUAL, INSTRUCTION (TRADITIONAL CHINESE)
(TW, SP)
2-582-896-21 MANUAL, INSTRUCTION (KOREAN) (KR)
A-1108-432-A OVERALL ASSY (RM-SC30)
ACCESSORIES
Part No.
Description
Remark


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2
CMT-NEZ3/NEZ5
REVISION HISTORY
Clicking the version allows you to jump to the revised page.
Also, clicking the version at the upper right on the revised page allows you to jump to the next revised
page.
Ver.
Date
Description of Revision
1.0
2005.03
New


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SERVICE MANUAL
COMPACT DISC DECK RECEIVER
HCD-NEZ3/NEZ5
Ver. 1.3 2005.11
SPECIFICATIONS
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.
9-879-528-04
2005K05-1
© 2005.11
Sony Corporation
Personal Audio Division
Published by Sony Engineering Corporation
­ Continued on next page ­
US Model
Australian Model
HCD-NEZ3
Canadian Model
AEP Model
UK Model
E Model
HCD-NEZ3/NEZ5
· 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.
Photo: HCD-NEZ5
Model Name Using Similar Mechanism
NEW
CD Section
Base Unit Name
BU-K7BD81D2 or BU-K8BD83S-WOD
Optical Pick-up Name
KSM-213EDP or KSM-213CDP
TAPE Section
Model Name Using Similar Mechanism
NEW
Tape Transport Mechanism Type
CMAL5Z231


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2
HCD-NEZ3/NEZ5
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.
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.
The following caution label is located inside the unit.
CLASS 1 LASER PRODUCT
LUOKAN 1 LASER LAITE
KLASS 1 LASER APPARAT
This appliance is classified
as a CLASS 1 LASER
product.
This label is located on the
rear exterior.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 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 DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY.
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.
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
0.15
µF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
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
(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
(with the tuning interval
set at 9 kHz)
Other models:
530
- 1,710 kHz
(with the tuning interval
set at 10 kHz)
531
- 1,602 kHz
(with the tuning interval
set at 9 kHz)
Antenna
AM loop antenna, external
antenna terminal
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,
230
- 240 V, 50/60 Hz
Other models:
AC 120, 220 or
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.
CD player section
Laser Diode Properties
Emission duration:
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)
Frequency response
20 Hz
- 20 kHz
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)


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3
HCD-NEZ3/NEZ5
TABLE OF CONTENTS
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-K7BD81D2) ...........................................
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
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
Ver. 1.1