Sony MZ-N505 Service Manual

SERVICE MANUAL
PORTABLE MINIDISC RECORDER
US Model
Canadian Model
AEP Model
UK Model
SPECIFICATIONS
MZ-N505
US and foreign patents licensed from Dolby
Laboratories.
– Continued on next page –
Model Name Using Similar Mechanism MZ-N707
Mechanism Type MT-MZN707-177
Optical Pick-up Name LCX-5R
Ver 1.0 2002. 01
9-873-459-01 Sony Corporation
2002A0500-1 Personal Audio Company
C 2002.1 Published by Sony Engineering Corporation
• OpenMG, “MagicGate”, “MagicGate Memory Stick”, “Memory Stick”,
VAIO,MusicClip and their logos are trademarks of Sony Corporation.
• “WALKMAN” is a trademark of Sony Corporation.
• Microsoft,Windows,Windows NT and Windows Media are trademarks
or registered trademarks of Microsoft Corporation in the United States
and/or other countries.
• IBM and PC/AT are registered trademarks of International Business
Machines Corporation.
• Macintosh is a trademark of Apple Computer,Inc.in the United States
and/or other countries.
• All other trademarks are trademarks of their respective owners. ™ and
® marks are omitted in this manual.
MD Recorder
Audio playing system
MiniDisc digital audio system
Laser diode properties
Material: GaAlAs MQW
Wavelength:
λ = 790 nm
Emission duration: continuous
Laser output: less than 44.6 µW
(This output is the value measured at a distance
of 200 mm from the lens surface on the optical
pick-up block with 7 mm aperture.)
Recording and playback time
When using MDW-80
Maximum 160 min. in monaural
Maximum 320 min. in stereo
Revolutions
Approx. 380 rpm to 2,700 rpm (CLV)
Error correction
ACIRC (Advanced Cross Interleave Reed
Solomon Code)
Sampling frequency
44.1 kHz
Sampling rate converter
Input: 32 kHz/44.1 kHz/48 kHz

Sony MZ-N505 Specifications

Power

input voltage	3 V
power requirements	AC Adaptor (AC-ES305)
battery type	AA Alkaline

Battery Life

battery life SP mode	42 hrs
battery life LP2 mode	48 hrs
battery life LP4 mode	56 hrs

Audio Specifications

sampling frequency	44.1 kHz
frequency response	20-20, 000Hz +/-3dB
data compression method	ATRAC/ATRAC3

Weight and Dimensions

weight	104 g
width	81.0 mm
height	74.4 mm
depth	27.9 mm

Summary

Servicing Notes

Handling the Optical Pick-up Block

Provides crucial safety and handling procedures for the optical pick-up block and laser diode.

System Requirements

Disassembly

Disassembly Flow

Outlines the step-by-step procedure for disassembling the unit.

Test Mode

Setting Method of Test Mode

Describes the different methods to enter the unit's test mode.

Operation in the Test Mode

Details how to operate the unit once the test mode is activated.

Releasing the Test Mode

Explains how to exit the test mode and return to normal operation.

Electrical Adjustments

Precautions for Adjustment

Important precautions to follow before and during electrical adjustments.

Adjustment Sequence

Lists the proper order for performing all necessary electrical adjustments.

NV Reset

Procedure for resetting the non-volatile memory.

Diagrams

Block Diagram – SERVO/USB Section

Shows the block diagram for the servo and USB sections of the device.

Block Diagram – AUDIO Section

Illustrates the block diagram for the audio processing sections.

Block Diagram - Display/Key Control/Power Supply Section

Printed Wiring Board - Main Board (Component Side)

Printed Wiring Board – Main Board (Conductor Side)

Schematic Diagram – Main Board (1/4)

Schematic Diagram – Main Board (2/4)

Schematic Diagram – Main Board (3/4)

Schematic Diagram – Main Board (4/4)

IC Pin Function Description

Details the pin functions for key integrated circuits.