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Marantz 74 CD38/o1B User Manual

Marantz 74 CD38/o1B
38 pages
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74
CD38/o1B/02B/05B
Manual
Compact
disc
player
DIGITAL AUDIO
TABLE
OF
CONTENTS
SECTION
PAGE
1.
TECHNICAL
SPECIFICATIONS
3
2.
WARNINGS
9
3.
SERVICING
HINTS
-
TOOLS
10
4.
DISMANTLING
INSTRUCTIONS
1
1
5.
SERVICE
TEST
PROGRAM
12
6.
CDM 12.1
START UP
DIAGRAM
13
7. FAULTFINDING
GUIDE
CDM
12.1
14
8.
FAULTFINDING
GUIDE
20
9.
SPECIFICATIONS
MEASUREMENT
21
10.
BLOCK
DIAGRAM
23
11.
WIRING
DIAGRAM
24
12.
CIRCUIT
DIAGRAM
and
PRINTED
BOARDS
12.1.
POWER
SUPPLY
and
TRANSFORMER
CONNECTIONS
25
12.2. SERVO
CIRCUIT
DIAGRAM
26
12.3.
DECODER
CIRCUIT
DIAGRAM
27
12.4.
DAC
CIRCUIT
DIAGRAM
28
12.5. MONO
BOARD
LAYOUT
29
12.6.
MAIN
PANEL
SOLDER
SIDE
30
12.7.
DISPLAY
&
KEYBOARD
31
13.
EXPLODED
VIEW
LOADER &
PARTS
LIST
32
14.
EXPLODED
VIEW
CABINET
&
MECHANICAL
PARTS
LIST
33
15.
ELECTRICAL
PARTS
LIST
34
Please use
this
service
manual
with
referring
to
the
user guide (D.F.U) without
fail.
PCS
89
146
model
CD-38
4822
725
51151
First
Issue
1997.9
225\y855010
ACT
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Marantz 74 CD38/o1B Specifications

General IconGeneral
TypeCD Player
Disc formatCD
Frequency response20Hz to 20kHz
Channel separation98dB
Total harmonic distortion0.0025%
Line output2V
Digital outputsCoaxial
Channels2

Summary

Marantz Design and Service

Ordering Parts

Procedure for ordering original Marantz parts, including required information and contact details for various regions.

Technical Specifications

General Specifications

Details mains voltage, frequency, power consumption, and remote control system.

Line Output Specifications

Specifies output voltage, frequency response, signal-to-noise ratio, and distortion for line output.

Safety Precautions and Warnings

Electrostatic Discharge (ESD) Precautions

Guidelines for handling ICs and semiconductors to prevent damage from static discharge.

Laser Safety Warning

Warning about invisible laser radiation when the unit is open.

Shock and Fire Hazard Service Test

Procedure for testing resistance to prevent shock and fire hazards after servicing.

Component Substitution Safety

Caution against substituting parts marked with a safety symbol.

Servicing Hints and Tools

Chip Component Handling

Instructions for dismounting and mounting chip components with diagrams and precautions.

Service Test Program

Service Mode 0

Tests for sledge movement, focus, and tray operations.

Service Mode 1

Tests for focus and laser light.

Service Mode 2

Tests for disc rotation and motor operations.

Service Mode 3

Tests for radial tracking and error messages.

Fault Finding Guide CDM 12.1

Focus Check Path

Troubleshooting steps for focus issues, referencing specific pages for detailed checks.

Light Path Check

Troubleshooting steps related to the light path, referencing specific pages.

Turntable Motor Path

Troubleshooting steps for turntable motor problems, referencing specific pages.

Radial Tracking Path

Troubleshooting steps for radial tracking issues, referencing specific pages.

Fault Finding - Actuator and Components

Lightpath Fault Diagnosis

Laser Supply and Current Checks

Procedures to check laser supply voltage and laser current.

Turntable Motor and HF Signal Checks

Radial Tracking Fault Diagnosis

Focus Path Troubleshooting

Laser Safety and Lightpath Measurements

Laser Damage Precautions

Essential conditions for measuring laser current and voltage to prevent damage.

Laser Current and Voltage Measurement

Detailed steps for measuring laser current and voltage with specific test points.

Turntable Motor Path Troubleshooting

Radial Tracking Path Troubleshooting

Radial Tracking and Eye Pattern

Verifying radial tracking, OTD activity, and eye pattern.

Functional Test and Obstruction Removal

General Fault Finding Guide

Specifications Measurement

Block Diagram

Wiring Diagram

Power Supply Circuit Diagram

Servo Circuit Diagram

Decoder Circuit Diagram

DAC Circuit Diagram

Control and Display Circuit Diagram

Electrical Parts List - Capacitors and Resistors

Electrical Parts List - Transistors, ICs, and Mains Voltage

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