Marantz 74 CD38/02B User Manual

74 CD38/o18/028/05B
Compact disc player
WISE
DIGITAL AUDIO
TABLE OF CONTENTS
SECTION PAGE
1. TECHNICAL SPECIFICATIONS ..0... cee eecesesssseceensseccscsesssesacessaeseseeueereueraresecosecssessssanenesensanesseseaaesnasneneneats 3
| WARININGS si issieiiscesccc ccs scchctec cca ceusewenoas ietycedins ctaSasc ds opabies piesane ce evatee Gaaactasteai dacaset ons cancastd ob iaanssisaeiade dageba nh aehia 9
3. SERVICING HINTS - TOOLS... cee cecesecseseseteseesesessscssseescsasseuseneeseessessssssesseatesesoesseesseessensessesegeeentenrsaees 10
4, DISMANTLING INSTRUCTIONS ...0..... ccc eccesccecssesesssssseeseseseneesseeeseensneeecsssneeseesecsussnesseensensessecngnseneeaesnens a
5. SERVICE TEST PROGRAM ...........ccccsssssssesssssssssesssesssessscsaesensesaeensenessessessesesseasenesseeaeeseeseaseseraeseeenseneenenees 12
6. CDM 12.1 START UP DIAGRAM... cecscecescssscesesessetsnesseseseneesseeeseeneeceesseeseesasaneenseacessessaeseseneesseeenrensenens 13
7. FAULTFINDING GUIDE CDM 12.1 0... ee eee ecseseceseseneesereseeeeseseesnaseseseeseseaeeseseeeesnseeseaseaesnneseaeeneseaan 14
8. FAULTFINDING GUIDE Las. cccciccccces cise concesseseresasnccscustscaessseaseanevscnestescenetusensaesadcaseetssaea secauesuscseavabesderanecatans 20
9. SPECIFICATIONS MEASUREMENT ............cccsscsecssssssessssenseeseessessesssesseenesesseaeeeesneseneeseenseeessaneesaesensagens 21
10: BLOCK DIAGRAM os iesisccvcccsevienecceseesstsieectescdectesctissssccvaassasadcossvevstensuasascansassbncoraadesapsosiesgiaaesesedneoseddascaacutars 23
11. WIRING DIAGRAM .........ecccsscsssesseessssesetsassssesssassussuessesseessccsseeaeeseseaeeaseaeseneserenseaesanensensenseesesseseatennseateneey 24
12. CIRCUIT DIAGRAM and PRINTED BOARDS
12.1. POWER SUPPLY and TRANSFORMER CONNECTIONS ........cscccessersseesssecsensesetecsenessseasessesnneeeees 25
12.2. SERVO CIRCUIT DIAGRAM .........:cccccsccssssesseereesecsesseeesseneeeneeeaeensersessecstsseseneeseaseasacesseesenseseenesnananeaees 26
12.3. DECODER CIRCUIT DIAGRAM .........ccccesesssesessesnseeeesesseenesseesessersenecseesersssessresscsesaessuaesneseaseneneegs 27
12.4. DAC CIRCUIT DIAGRAM ..............cecccsceseseseecssesseessscasseasesseesseusersesessesssesrecoessesnesesessesenesessaeersgneneteneas 28
12.5. MONO BOARD LAYOUT ....... cece cecesessesscssserscssseesecsesseesecsecsassesaeeasseesessesasenenseasenecaesasensarenseseeaaesasansgs 29
12.6. MAIN PANEL SOLDER SIDE... se eeceseseeseessesssesessessnasseassssseassesseusecceeesescsessseseesesensesseaeeessesaneeneas 30
12.7. DISPLAY & KEYBOARD ........ eee eeeeeeeeeteeseeeseenecseeseesseessesseasseeceasecasesseseassesaeassesseenesentsressgeneeasaenaeees 31
13. EXPLODED VIEW LOADER & PARTS LIST oo... ceecccccsescesssesecesesensnecsesessssneseeceecaeaeeseseeaneansaguesensnneses 32
14. EXPLODED VIEW CABINET & MECHANICAL PARTS LIST... ce cecesesseeseesetescaeeeseesesassaeseeeseneneeotes 33
15. ELECTRICAL PARTS LIST oo... cece cessessnssssecssesauscssssssansseessesssseseessecoucessssenssnenesenanssasagessnsaesesanennennenees 34
Please use this service manual with referring to the user guide (D.F.U) without fail.
HER eR BP eR BRE @ °
PCS
89
146
model
CD-38
!
;
4827 725 51151
First Issue 1997.9
225855010 ACT

Marantz 74 CD38/02B Specifications

General

Channels	2
Frequency Response	20 Hz - 20 kHz
Total Harmonic Distortion	0.0025%
Output Voltage	2V
Digital Output	Coaxial
Dimensions	420 x 86 x 300 mm
Transport	Philips CDM-4/19

Summary

Technical Specifications

General Specifications

Electrical characteristics like mains voltage, frequency, and power consumption.

Output Specifications

Safety Precautions

ESD and Laser Hazards

Precautions for electrostatic discharge and invisible laser radiation during servicing.

Electrical Safety and Testing

Procedures for shock/fire hazard tests and general safety advice.

Service Test Program

Service Modes Overview

Procedures for operating the unit in various service modes for testing.

Faultfinding Guide CDM 12.1

CDM 12.1 Troubleshooting Paths

General Faultfinding Guide

System Troubleshooting Paths

Wiring Diagram

Component Interconnections

Power Supply Circuit Diagram

Servo Circuit Diagram

Decoder Circuit Diagram

DAC Circuit Diagram

Electrical Parts List