Marantz 2275 - Page 2

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TABLE OF CONTENTS
SECTION PAGE
VEACFOGUCTIONN oe ieibececcdieesseerientscesciecavceasasscttecdeusctsdacdadcaccceticacsesatecdtvancdescscbencsevdndaacnocounassescaeacde 1
Service Notes --s--ceseececccncccucccccseccccssccecccessceenetensseeceaentecesseesccesenesesnenaceseerennee neue eunseescenesesennes 1
PAM Tuner — coccoccvarccccencccccccccnnsanssanssscancnsuccesesenecepecerersunrersaescsceusesesessene neces ses nanenncuessenranncese neg 1
PIV Tinh ectdestisesecccaiteanscatecds cucecsee ecoadeasuceiteusceuscecscedsconscusctcstocacsecsscueecestsedsaddsccevaeesideceecse 2
Phono and Tone Amplifiers a Wie u Waveho vnhek Gite be sedis vis veueu Fs URUHN donee Da NNN ErOEs cone Rie bayes Resets Ncdeweseieancass 5
Power Amplifier ---+:---+--+sssssreseseneescensnarescennansnensceessansesenscsucensenessesasseceuesnsseusenecantoneasseesenses 5
Power Protection Circuit — <sressecescceceneceensccecnnensnenececensarensssenscunsnenansncussaucsananereseseaueaaucuseasaes 6
Speaker Protector Relay Circuit ----+ssssesssessesseesesesscnssesseseeesstenenasenssssssnseusesenuensanesaeenegs 6
Suggestions for Troubleshooting the Power Amplifier —-------secsssseseseeeeceenseneresenenaesenserersens 6
Test Equipment Required FOr SErViCiAG ---re-reecee seven enceenstecteceeetseeeneeeeseneneesenceenssnnconcneenseneane 7
AM Alignment Procedures «:+:ssesesseessecsseecenteesnensncnercenenrensnscnenenennseecacecaeauanen seusneeauaneguecenneges 7
FM Alignment Procedures — -+:-:+++++sssceeceeeeneesenscceeessrasenesnecceecansscerneeneeseensecaeenssenseeseagecssensrents 8
Stereo Separation Alignment --+++--sscecceerseceeteeeceeeenennenensenceneneneeeensennasssecsecencaneneeneeeaeeaoannenens 8
Muting Circuit Alignment —-ss::cscssssccscseecseseeneesnsnreeeseenerecanseesenaneeaeancensassnectenseacsonenansgenereeeas 8
FM Dolby Level Adjustment ----scccssssseccsccsseerecensssnceeenseeceeenenseanseenanascenaansnsenaneeeaaeaseseone nets 9
AUCIO ACJUSTMENTS —-vserereececeeceeerecansenentaencnenstecaseeatetensneceuaccustenseusasensceececaseustenaasensersranssees 9
Parts List: © <isdvseiccececceccen cies dens sonst cee cnc ccecn sped sad sedacvenccqccseneseceeceatescstac etccetasniceostecueeswcasteesses 20~32
Technical Specifications .---+-s.secseccccsseecrenereesessesnssssnessnensnecensnnenerensasenntanencaneasensaccenenoaenenees 33~34
Servicing Informations for European Model — ----ssssesscectesesseesseeseeesenssneseeeeeeennstaanenees 35~37,39
LIST OF ILLUSTRATIONS
FIGURE PAGE
1. Block Diagram OF the: HA1156 . © -wcisseveccs dice eeseeate caress dccsecelavedesssovedennsandievasaseveaveadeuess 4
2. Dial Stringing --scrccceesscccceenccccceesnseeecnensanuecnececcueeescuanecesarasuceuecaseeseeeenensnteesssesnssenenapeeteneaes 10
3. Front Panel Adjustments and Component LOCATIONS: Seseewssse cs ches ccscenelecvecetaiic cocdeceactscasede 11
4. Main Chassis Component Locations (Top VICW) -onsecsenceseenccsecceccnerenseentcnseeeeseucnscesenrenneras 11
5. Rear Panel Jacks and Component LOCATIONS: ssesetecide secs desaccscecsaacessws dcctenducevcccvecaneaensesenes 12
6. Main Chassis Component Locations (BOttOM View) — -sscccccsersscnsercersnsecesecesensucesonseeseeeeoar 12
7. FM Front End Assembly P100 Component POCATIONS: © cieesesdsccesesces cecccscdteesi cies egacvesseess 13
8. AM Tuner Assembly P150 Component LOCATIONS sseseesisees dens ccceecdvccsccnavecvecadetsevaasireeane 13
9. FM IF Amplifier Assembly P200 Component Locations — --+::::sseseeserseeteensserererenenensanees 13
10. MPX Stereo Decoding Amplifier Assembly P300 Component Locations —-+--+++-+seseeseeees 14
11. Dolby FM Level Amplifier Assembly PCO1 Component Locations —-ssreeceeesesseeserstsensees 14
12. Phono Amplifier Assembly P400 Component Locations — «.+++.::ssseeeeseestsesrenssrnsenenannennees 14
13. Power Amplifier Assembly P700 Component Locations — ----+sssseseeesssceeeseeeceeseneeneneneeenes 15
14. Power Supply and Protection Relay Circuit Assembly P800 Component Locations 15
15, Pre and Tone Amplifier Assembly PEO1 Component Locations «--++-++ssessseesssenseneeeterenees 16
16. Dolby FM, Mono L, R, Multipath and Tape Monitor Switches Assembly
PSO1 Component Locations —.......ccccecceesssconseeceeneceeeseeensseseceseecnensseesoacaaccecsssseeeeeassesessaees 16
17. Muting, Speaker, Loudness, Power, Hi and Low Filter Switches PT0O1
Component Locations — ...ccccceececessseceereeeceseseseseessauenececaueenseseseeeaentecseeseeasesseescusngesseseesees 16
18. Function Lamps Assembly PY01 Component Locations —........cecscccessesecscseceeseeseesesssnacs 17
19. Muting Level and Antenna Attenuator Assembly PUO1 Component
LOCATIONS” _-eessevebek. cctsteeese elie laste ated adaciidecc onda cde edad veclaas vwedaswardecdeuabieesidvaaibovaenedacesesndens 17
20 _ Dial Scale Illuminator Assembly PZ01 Component Locations —.........scssssessesceeeeeeseseneeee 17
21. Exploded Mechanical Diagram — ...........cecssesesessescncnsnescceecceseceeaasaaessssssessessrsasessuesseses 18~19