Sony HCD-NEZ31 User Manual

SERVICE MANUAL
COMPACT DISC DECK RECEIVER
HCD-NEZ31
Ver. 1.0 2006.08
SPECIFICATIONS
9-887-362-01
2006H05-1
© 2006.08
Sony Corporation
Personal Audio Division
Published by Sony Techno Create Corporation
Mexican Model
• HCD-NEZ31 is the amplifier, CD player, tape deck
and tuner section in CMT-NEZ31.
Model Name Using Similar Mechanism HCD-NEZ30
CD Section Base Unit Name BU-K8BD83S-WOD
Optical Pick-up block Name KSM-213CDP
TAPE Section
Model Name Using Similar Mechanism HCD-NEZ30
Tape Transport Mechanism Type CMAL5Z235A
Amplifier section
Continuous RMS power output (reference): 15 + 15 W (6 ohms at 1 kHz,
10% THD)
The following are measured at AC 120 V, 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)
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
CD player section
System: Compact disc and digital audio system
Laser Diode Properties
Emission Duration: Continuous
Laser Output*: Less than 44.6µW
* 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.
Tape deck section
Recording system: 4-track 2-channel, stereo
AM tuner section:
Tuning range
530 – 1,710 kHz (with 10 kHz tuning interval)
531 – 1,710 kHz (with 9 kHz tuning interval)
Antenna: AM loop antenna, external antenna terminal
Intermediate frequency: 450 kHz
General
Power requirements
AC 120 V, 60 Hz
Adjustable with voltage selector
Power consumption:
45 watts
Dimensions (w/h/d) (excl. speakers):
Mass (excl. speakers):
Approx. 3.3 kg
Approx. 164 × 235 × 265 mm
Design and specifications are subject to change without notice.
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

Sony HCD-NEZ31 Specifications

General

CD Player	Yes
Radio Tuner	FM/AM
Bluetooth	No
USB Playback	No
Cassette Deck	Yes
Remote Control	Yes
Speaker Configuration	2 Speakers
Type	Mini Hi-Fi System

Summary

SPECIFICATIONS

Technical Specifications Overview

Details amplifier, CD, tape, and tuner technical characteristics.

SERVICING NOTES

Handling Precautions

Covers safe handling of optical pick-up, laser diode, and unleaded solder.

Laser Diode Emission Check

Describes the procedure for checking laser diode emission.

GENERAL INFORMATION

Basic Operations

Explains fundamental functions like playing CDs, tapes, and listening to the radio.

System Setup and Settings

Details remote control usage, clock setting, and sound adjustments.

MP3 Disc Playback Notes

Provides specific guidelines for playing MP3 discs.

DISASSEMBLY PROCEDURES

Disassembly Flow and Cabinet

Outlines the overall disassembly sequence and cabinet removal.

Base Unit, Mechanical Deck, and Front Panel

Covers disassembly of key internal components.

Main Board and Tuner Section

Details removal steps for the main board and tuner.

TEST MODES

Cold Reset and Panel Test

Explains reset procedures and testing the LCD panel.

CD Error History and Tuner Step

Covers accessing CD error codes and changing AM tuning steps.

MECHANICAL ADJUSTMENTS

Precautions and Torque/Tension Measurement

Provides precautions for adjustments and details torque/tension specifications.

ELECTRICAL ADJUSTMENTS

Record/Playback Head Azimuth Adjustment

Details the procedure for adjusting the azimuth of the record/playback head.

CD SECTION DETAILS

Focus Bias Check Procedure

Describes the procedure for checking the CD player's focus bias.

DIAGRAMS AND SCHEMATICS

Block Diagrams

Presents block diagrams for CD Servo and Main Sections.

Circuit Board Layouts

Shows the location of various circuit boards.

Printed Wiring and Schematics

Details the PWB and schematic for CD, Main, and Power Supply boards.

EXPLODED VIEWS

Cabinet and Mechanical Components Views

Shows exploded views of the cabinet and mechanical deck.

Panel and Main Board Components Views

Details exploded views for the panel and main board assemblies.

ELECTRICAL PARTS LIST

Component Lists by Board

Provides detailed parts lists for AC, CD, Main, Panel, and other boards.