Sony CMT-NEZ3 / CMT-NEZ5 / HCD-NEZ3 / HCD-NEZ5 Service Manual ▷ View online
SERVICE MANUAL
COMPACT DISC DECK RECEIVER
HCD-NEZ3/NEZ5
Ver. 1.4 2006.09
SPECIFICATIONS
Main unit
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
(The United States model only)
DISTORTION:
(The United States model only)
CMT-NEZ5
With 6 ohm loads, both channels driven, from
120
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.
total harmonic distortion from 250 milliwatts to
rated output.
CMT-NEZ3
With 6 ohm loads, both channels driven, from
120
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.
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
DIN power output (rated): 18 + 18 W (6 ohms at
1 kHz, DIN)
Continuous RMS power output (reference):
25 + 25W (6 ohms at
1 kHz, 10% THD)
1 kHz, 10% THD)
Music power output (reference):
38 + 38 W
Pan-American model:
Continuous RMS power output (reference):
Continuous RMS power output (reference):
20 + 20 W (6 ohms at
1 kHz, 10% THD)
1 kHz, 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
The following measured at AC 120, 220 or 240 V,
50/60 Hz
DIN power output (rated): 14 + 14 W (6 ohms at
1 kHz, DIN)
Continuous RMS power output (reference):
20 + 20 W (6 ohms at
1 kHz, 10% THD)
1 kHz, 10% THD)
Inputs
AUDIO IN:
AUDIO IN:
Sensitivity 250 mV,
impedance 47 kilohms
impedance 47 kilohms
Outputs
PHONES:
PHONES:
Accepts headphones with
an impedance of 8 ohms or
more
an impedance of 8 ohms or
more
SPEAKER:
Accepts impedance of 6 to
16 ohms.
16 ohms.
CMT-NEZ3
North-American model:
Continuous RMS power output (reference):
Continuous RMS power output (reference):
10 + 10 W (6 ohms at
1 kHz, 10% THD)
1 kHz, 10% THD)
European model:
DIN power output (rated): 11 + 11 W (6 ohms at
DIN power output (rated): 11 + 11 W (6 ohms at
1 kHz, DIN)
Continuous RMS power output (reference):
15 + 15 W (6 ohms at
1 kHz, 10% THD)
1 kHz, 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
The following measured at AC 120, 220 or 240 V,
50/60 Hz
DIN power output (rated): 11 + 11 W (6 ohms at
1 kHz, DIN)
Continuous RMS power output (reference):
15 + 15 W (6 ohms at
1 kHz, 10% THD)
1 kHz, 10% THD)
Inputs
AUDIO IN:
AUDIO IN:
Sensitivity 250 mV,
impedance 47 kilohms
impedance 47 kilohms
Outputs
PHONES:
PHONES:
Accepts headphones with
an impedance of 8 ohms or
more
an impedance of 8 ohms or
more
SPEAKER:
Accepts impedance of 6 to
16 ohms.
16 ohms.
9-879-528-05
2006I05-1
© 2006.09
© 2006.09
Sony Corporation
Personal Audio Division
Published by Sony Techno Create Corporation
Published by Sony Techno Create 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.
tuner section in CMT-NEZ3.
•
HCD-NEZ5 is the amplifier, CD player, tape deck and
tuner section in CMT-NEZ5.
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 or CMAL5Z235A
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.
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.
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 APPARA
T
This appliance is classified
as a CLASS 1 LASER
product.
as a CLASS 1 LASER
product.
This label is located on the
rear exterior.
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.
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.
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
Ω
0.15
µ
F
AC
voltmeter
(0.75 V)
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
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:
Pan-American model:
530
− 1,710 kHz
(with the tuning interval
set at 10 kHz)
531
set at 10 kHz)
531
− 1,710 kHz
(with the tuning interval
set at 9 kHz)
set at 9 kHz)
European model:
531
− 1,602 kHz
(with the tuning interval
set at 9 kHz)
set at 9 kHz)
Other models:
530
− 1,710 kHz
(with the tuning interval
set at 10 kHz)
531
set at 10 kHz)
531
− 1,602 kHz
(with the tuning interval
set at 9 kHz)
set at 9 kHz)
Antenna
AM loop antenna, external
antenna terminal
antenna terminal
Intermediate frequency
450 kHz
General
Power requirements
North American model:
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
230
− 240 V, 50/60 Hz
Adjustable with voltage
selector
selector
Power consumption
CMT-NEZ5
European model:
CMT-NEZ5
European model:
60 W
0.3 W (in Power Saving
Mode)
0.3 W (in Power Saving
Mode)
Other models:
50 W
CMT-NEZ3
North American model:
North American model:
40 W
European model:
45 W
0.3 W (in Power Saving
Mode)
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:
CMT-NEZ5:
Approx. 3.6 kg
CMT-NEZ3
North American model:
North American model:
Approx. 2.8 kg
Other models:
Approx. 3.6 kg
Design and specifications are subject to change
without notice.
without notice.
CD player section
Laser Diode Properties
Emission duration:
continuous
Laser Output: Less than
44.6
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)
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.
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.
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)
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)
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
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
4
HCD-NEZ3/NEZ5
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.
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.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
BLOCK OR BASE UNIT
SECTION 1
SERVICING NOTES
•
MODEL IDENTIFICATION
– Rear Cabinet –
MODEL
Power Voltage Incdication
NEZ3: US, CND
AC: 120 V 60 Hz 40 W
NEZ3: AEP, UK, EE, RU
AC: 230 V - 50/60 Hz 45 W
NEZ3: E, E51, SP
AC: 120 V/220 V/230
−
240 V
- 50/60 Hz 45 W
NEZ3: EA
AC: 120
−
127 V/220 V/230
−
240 V
- 50/60 Hz 45 W
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, EE, RU
AC: 230 V - 50/60 Hz 60 W
NEZ5: E, E51, SP
AC: 120 V/220 V/230
−
240 V
- 50/60 Hz 50 W
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
EE
AR : Argentina model
AUS : Australian model
CND: Canadian model
E51 : Chilean and Peruvian model
EA : Saudi Arabia model
EE
: East European model
KR : Korean model
MX : Mexican model
RU : Russian model
SP
MX : Mexican model
RU : Russian model
SP
: Singapore model
TW : Taiwan model
Power Voltage Indication
Fig.1 Method to push the S1820
S1820
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 pick-
up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
the disc reflective surface by the objective lens in the optical pick-
up 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 lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
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)
: 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
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)
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.
occur such as on IC pins, etc.
•
Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
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.
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.
Emission of the laser diode is visually checked.
1. Open the upper lid.
2. Push the S1820 as shown in Fig.1.
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.
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.
