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2007D05-1
© 2007.04

US Model

Canadian Model

UK Model

E Model

East European Model

•

HCD-NEZ30 is the amplifier, CD player, tape deck
and tuner section in CMT-NEZ30.

Model Name Using Similar Mechanism

HCD-NEZ3

CD Section

Base Unit Name

BU-K8BD83S-WOD

Optical Pick-up block Name

KSM-213CDP

TAPE Section

Model Name Using Similar Mechanism

NEW

Tape Transport Mechanism Type

CMAL5Z235A

AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
(

 

The United States model only)

With 6 ohm loads, both channels driven, from 120 – 10,000 Hz; rated 15 watts 
per channel minimum RMS power, with no more than 10% total harmonic 
distortion from 250 milliwatts to rated output.

North-American model:

Continuous RMS power output (reference): 15 + 15 W (6 ohms at 1 kHz, 
10% THD)

European model:

DIN power output (rated): 11 + 11 W (6 ohms at 1 kHz, DIN) 
Continuous RMS power output (reference): 17 + 17 W (6 ohms at 1 kHz, 
10% THD)
Music power output (reference): 28 + 28 W 

The following are measured at AC 220 V, 50/60 Hz (Argentine model), AC 
120 V, 60 Hz (Mexican model), AC 120, 220 or 230 – 240 V, 50/60 Hz (other 
models)

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)

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

System: Compact disc and digital audio system
Laser Diode Properties

Emission Duration: Continuous
Laser Output*: Less than 44.6

µ

W

* This output is the value measurement at a distance of 200 mm from the 

objective lens surface on the Optical Pick-up Block with 7mm aperture.

Recording system: 4-track 2-channel, stereo

AM tuner section:

Tuning range
Pan-American model:  530 – 1,710 kHz (with 10 kHz tuning interval) 

531 – 1,710 kHz (with 9 kHz tuning interval)

Other models:  530 – 1,710 kHz (with 10 kHz tuning interval)

European models:  531 – 1,602 kHz (with 9 kHz tuning interval)

531 – 1,602 kHz (with 9 kHz tuning interval)

Antenna: AM loop antenna, external antenna terminal
Intermediate frequency: 450 kHz

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

Argentine model: AC 220 V, 50/60 Hz
Other models: AC 120, 220 or 230 – 240 V, 50/60 Hz
Adjustable with voltage selector

Power consumption:

North American model: 45 watts
Other models: 45 watts

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

Mass (excl. speakers): 

North

Approx. 164 

×

 235 

×

 265 mm

 American model: Approx. 3.2 kg

European model: Approx. 3.6 kg
Other models: Approx. 3.3 kg

Design and specifications are subject to change without notice.

FM stereo, FM/AM superheterodyne tuner

FM tuner section:

Tuning range
North American model: 87.5 – 108.0 MHz (100 kHz step)
Other models: 87.5 – 108.0 MHz (50 kHz step)
Antenna: FM lead antenna
Antenna terminals: 75 ohms unbalanced
Intermediate frequency: 10.7 MHz

2

•

Never reuse a disconnected chip component.

•

Notice that the minus side of a tantalum capacitor may be

damaged by heat.

•

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.

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

 0

0

0

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.

1.5 k

Ω

0.15 

µ

F

AC
voltmeter
(0.75 V)

To Exposed Metal
Parts on Set

Earth Ground

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)

classified as a CLASS 

This appliance is

1 LASER product. This 
marking is located on the 
rear exterior.

3

...............................................

3

...................................................................

6

3-1.

Disassembly Flow ...........................................................

8

3-2.

Cabinet .............................................................................

8

3-3.

Cabinet (Top) Section ......................................................

9

3-4.

Base Unit (BU-K8BD83S-WOD) ...................................

9

3-5.

Front Panel Section ......................................................... 10

3-6.

Mechanical Deck (CMAL5Z235A) ................................ 10

3-7.

MAIN Board .................................................................... 11

3-8.

Tuner (FM/AM) ............................................................... 11

.............................................................. 12

....................... 13

......................... 14

7-1.

Block Diagram – CD SERVO Section – ......................... 17

7-2.

Block Diagram – MAIN Section – .................................. 18

7-3.

Printed Wiring Board – CD Board – ............................... 20

7-4.

Schematic Diagram – CD Board – .................................. 21

7-5.

Printed Wiring Boards – MAIN Section – ...................... 22

7-6.

Schematic Diagram – MAIN Section (1/2) – .................. 23

7-7.

Schematic Diagram – MAIN Section (2/2) – .................. 24

7-8.

Printed Wiring Board – PANEL Board – ........................ 26

7-9.

Schematic Diagram – PANEL Board – ........................... 27

7-10. Printed Wiring Boards – DC Section – ........................... 28
7-11. Printed Wiring Board – AC Board – ................................ 29
7-12. Schematic Diagram – POWER SUPPLY Section – ........ 30

8-1.

Cabinet Section ................................................................ 36

8-2.

Mechanical Deck Section ................................................ 37

8-3.

Panel Board Section ........................................................ 38

8-4.

Cabinet (Top) Section ...................................................... 39

8-5.

MAIN Board Section ....................................................... 40

8-6.

AC Board, DC Board Section ......................................... 41

................................ 42

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.

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 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.

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.

Refer to SUPPLEMENT-1 for the CD board of printed wiring board,
schematic diagram and electrical parts list of UK and East European
models.
When repairing the set of except UK and East European models, refer to
either of original service manual/SUPPLEMENT-1 according to the set.

Refer to SUPPLEMENT-2 for the HEAD PHONE board of printed wiring
board, schematic diagram and electrical parts list of UK and East European
models.
When repairing the set of except UK and East European models, refer to
either of original service manual/SUPPLEMENT-2 according to the set.

Refer to SUPPLEMENT-3 for the PANEL board of printed wiring board,
schematic diagram and electrical parts list of UK and East European
models.
When repairing the set of except UK and East European models, refer to
either of original service manual/SUPPLEMENT-3 according to the set.

Refer to SUPPLEMENT-1 for the MAIN board of printed wiring board,
schematic diagram and electrical parts list of except US and Canadian
models.
When repairing the set of US and Canadian models, refer to either of
original service manual/SUPPLEMENT-1 according to the set.

4

During normal operation of the equipment, emission of the laser
diode is prohibited unless the upper lid is closed while turning ON
the S820. (push switch type)
The following checking method for the laser diode is operable.

•

1. Open the upper lid.
2. Push the S820 as shown in Fig.1.

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.

S820

Model Name

Part No.

E model

2-665-907-0[]

Mexican model

2-665-908-0[]

Chilean and Peruvian models

2-665-909-0[]

Argentina model

2-665-910-0[]

US and Canadian models

2-665-913-0[]

UK model

3-100-772-0[]

East European model

3-312-856-0[]

Part No.

In this set, the main power transformer (T902) and sub power
transformer (T901) of US and Canadian models have been changed
in the midway of production.
The mount parts on DC board and Part No. of DC board have been
changed along with it.
Perform after confirming which type set when you repair set because
there is a suited combination.

•

Distinguish by the print of label pasted to side of main power
transformer (T902).

•

TYPE A

TYPE B

POWER

1-443-902-11

1-443-903-11

TRANSFORMER

TRANSFORMER,

TRANSFORMER,

(T902)

POWER

POWER

T901

1-443-833-11

1-443-846-11

(on AC board)

TRANSFORMER,

TRANSFORMER,

POWER

POWER

D921

NO MOUNT

6-501-193-01

(on DC board)

DIODE 1SS355WTE-17

R911

1-216-841-11

1-216-829-11

(on DC board)

METAL CHIP

METAL CHIP

47K   5%   1/10W

4.7K   5%   1/10W

R912

1-216-841-11

1-216-845-11

(on DC board)

METAL CHIP

METAL CHIP

47K   5%   1/10W

100K   5%   1/10W

R920

NO MOUNT

1-216-864-11

(on DC board)

SHORT CHIP   0

DC board

A-1158-136-A

A-1216-850-A

1-443-902-11: TYPE A
1-443-903-11: TYPE B