Marantz 74 CD38 Service 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.
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4827 725 51151
First Issue 1997.9
225855010 ACT