DHC-NXM4D, HCD-NXM4D - Sony Audio Service Manual (repair manual)

E Model

Australian Model

2005E02-1
© 2005.05

– Continued on next page –

• HCD-NXM4D is the Amplifier, DVD player,

tape deck and tuner section in DHC-NXM4D.

Model Name Using Similar Mechanism

NEW

DVD

DVD Mechanism Type

CDM81A-DVBU60

Section

Base Unit Name

DVBU60

Optical Pick-up Name

DBU-3

TAPE

Model Name Using Similar Mechanism

HCD-CPX22

Section

Main unit
Amplifier section
The following measured at AC 120, 127, 220, 240 V, 50/60 Hz
DIN power output (rated):

60 + 60 watts
(6 ohms at 1 kHz, DIN)

Continuous RMS power output (reference)
Front speaker:

75 + 75 watts
(6 ohms at 1 kHz, 10% THD)

Center speaker:

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

Surround speaker:

40 + 40 watts
(6 ohms at 1 kHz, 10% THD)

Sub woofer:

120 watts
(4 ohms at 100 Hz, 10% THD)

Inputs
VIDEO/SAT IN (phono jacks):

voltage 250/450 mV, impedance 47
kilohms

MIC1/MIC2 (phone jacks):

sensitivity 1 mV, impedance 10
kilohms

Outputs
VIDEO/SAT OUT (phono jacks):

voltage 250 mV, impedance 1 kilohm

VIDEO OUT (phono jack):

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
PB, PR: 0.7 Vp-p, 75 ohms

PHONES (stereo mini jack): accepts headphones of 8 ohms or

more

FRONT SPEAKER:

Use only the supplied speaker
SS-NXM4D

SURROUND SPEAKER:

Use only the supplied speaker
SS-RS400S

CENTER SPEAKER :

Use only the supplied speaker
SS-CT400S

SUB WOOFER SPEAKER: Use only the supplied speaker

SS-WG4D

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 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.

This appliance is classified as
a CLASS 1 LASER product.
This label is located on the rear
exterior.

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.

Disc player section
System

Compact disc and digital audio and
video system

Laser

Semiconductor laser
(DVD: 

λ=650 nm, CD: λ=780 nm)

Emission duration: continuous

Frequency response

DVD (PCM 48 kHz):
2 Hz – 22 kHz (

±1 dB)

CD: 2 Hz – 20 kHz (

±1 dB)

Video color system format

Latin American model: NTSC
Other models: NTSC, PAL

Tape deck section
Recording system

4-track 2-channel stereo

Frequency response

50 – 13,000 Hz (

±3 dB), using Sony

TYPE I cassette

Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range

87.5 – 108.0 MHz (50 kHz step)

Antenna

FM lead antenna

Antenna terminals

75 ohms unbalanced

Intermediate frequency

10.7 MHz

AM tuner section
Tuning range
Latin American models:

530 – 1,710 kHz
(with the interval set at 10 kHz)
531 – 1,710 kHz
(with the interval set at 9 kHz)

Saudi Arabian models:

531– 1,602 kHz
(with the interval set at 9 kHz)

Other models:

531 – 1,602 kHz
(with the interval set at 9 kHz)
530 – 1,710 kHz
(with the interval set at 10 kHz)

Antenna

AM loop antenna

Antenna terminals

External antenna terminal

Intermediate frequency

450 kHz

General
Power requirements
Australian model:

230 – 240 V AC, 50/60 Hz

Saudi Arabian model:

120 – 127 V or 220 – 240 V AC,
50/60 Hz
Adjustable with voltage selector

Thai model:

220 V AC, 50/60 Hz

Other models:

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

Power consumption

315 watts

Dimensions (w/h/d)

Approx. 230 x 290 x 355 mm

Mass

Approx. 7.0 kg

Design and specifications are subject to change without notice.

3

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

4

Location of Controls ........................................................

5

3-1.

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

7

3-2.

Case .................................................................................

8

3-3.

Back Panel .......................................................................

8

3-4.

DVD Section ...................................................................

9

3-5.

Main Board ...................................................................... 10

3-6.

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

3-7.

Front Amp Boardm Sur Amp Board ................................ 11

3-8.

Tape Mechanism Deck .................................................... 12

3-9.

Panel Board ..................................................................... 12

3-10. Video Board ..................................................................... 13
3-11. DMB07 Board, DVD Mechanism Deck

(CDM81A-DVBU60) ...................................................... 13

3-12. Tray .................................................................................. 14
3-13. Motor Board, M761 (LD/ST Motor),

M762 (BU U/D Motor) ................................................... 14

3-14. Base Unit (DVBU60) ...................................................... 15
3-15. RF Board ......................................................................... 15
3-16. Optical Pick-Up (DBU-3) ............................................... 16

.............................................................. 17

....................... 19

Deck section .................................................................... 26
Video Section .................................................................. 27

7-1.

Circuit Board Location .................................................... 29

7-2.

Block Diagram  – DVD DSP (1/2) Section – .................. 31

7-3.

Block Diagram  – DVD DSP (2/2) Section – .................. 32

7-4.

Block Diagram  – Tuner/Tape Deck Section – ................ 33

7-5.

Block Diagram  – Main Section – ................................... 34

7-6.

Block Diagram  – Amp Section – .................................... 35

7-7.

Printed Wiring Board  – RF Board – ............................... 36

7-8.

Schematic Diagram  – RF Board – .................................. 37

7-9.

Printed Wiring Board  – DVD Mechanism Board – ....... 38

7-10. Schematic Diagram  – DVD Mechanism Board – .......... 39
7-11. Printed Wiring Board  – DMB07 Board (Side A) – ........ 40
7-12. Printed Wiring Board  – DMB07 Board (Side B) – ........ 41
7-13. Schematic Diagram  – DMB07 Board (1/6) – ................. 42
7-14. Schematic Diagram  – DMB07 Board (2/6) – ................. 43
7-15. Schematic Diagram  – DMB07 Board (3/6) – ................. 44
7-16. Schematic Diagram  – DMB07 Board (4/6) – ................. 45
7-17. Schematic Diagram  – DMB07 Board (5/6) – ................. 46
7-18. Schematic Diagram  – DMB07 Board (6/6) – ................. 47
7-19. Printed Wiring Board  – Video Board – .......................... 48
7-20. Schematic Diagram  – Video Board – ............................. 49
7-21. Printed Wiring Boards  – Main Board – .......................... 50
7-22. Schematic Diagram  – Main Board (1/3) – ..................... 51
7-23. Schematic Diagram  – Main Board (2/3) – ..................... 52
7-24. Schematic Diagram  – Main Board (3/3) – ..................... 53
7-25. Printed Wiring Boards  – Panel Board – ......................... 54
7-26. Schematic Diagram – Panel Board – ............................... 55
7-27. Printed Wiring Board  – Disc SW, Vol, HP Board – ....... 56
7-28. Schematic Diagram  – Disc SW, Vol, HP Board – .......... 57
7-29. Printed Wiring Board  – Front Amp Board – .................. 58
7-30. Schematic Diagram  – Front Amp Board – ..................... 59
7-31. Printed Wiring Board  – SURAmp Board – .................... 60
7-32. Schematic Diagram  – SUR Amp Board – ...................... 61
7-33. IC Block Diagram ........................................................... 63

8-1.

Case, Rear Panel Section ................................................. 78

8-2.

Front Panel Section ......................................................... 79

8-3.

Chassis Section ................................................................ 80

8-4.

DVD Mechanism Deck Section-1

(CDM81A-DVBU60) ..................................................... 81

8-5. DVD Mechanism Deck Section-2

(CDM81A-DVBU60) ..................................................... 82

8-6. DVD Mechanism Deck Section-3

(CDM81A-DVBU60) ..................................................... 83

8-7.

Base Unit (DVBU60) ...................................................... 84

................................ 85

4

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.

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.

Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveform is output several times.

tape mechanism deck

Jig (J-2501-271-A)

Jig (J-2501-270-A)

CN301

CN302

If CD/DVD mechanism deck is exchanged while the desk had gone into trays 2 or 3, since the address is memorized by the microprocessor,
the set will not operate normally.
In this case, please perform cold reset with reference to test mode (page 17.)

• Abbreviation

E2

: 120 V AC Area in E model

E3

: 240 V AC Area in E model

E15 : Iran model
EA

: Saudi Arabia model

SP

: Singapore model

MY : Malaysia model
AUS : Australian model
TH

: Thai model

MODEL

PART No.

SP, MY models

4-253-361-0[]

E2 model

4-253-361-1[]

E3, E15 model

4-253-361-2[]

EA model

4-253-361-3[]

AUS model

4-253-361-4[]

TH model

4-253-361-5[]

PART No.