Marshall Amplification 1987X - Rear Panel Functions

ENGLISH
5
REAR PANEL FUNCTIONS
1. EFFECTS LOOP LEVEL
Choosebetweenthetwodierentlooplevels
tomatchthetypeofeect(s)connectedtothe
eectsloop.Thehigherlevel(+4dBV:switch
‘out’)suitsrackprocessorsandthelowerlevel
(-10dBV:switch‘in’)suitsoorpedals.
2. EFFECTS LOOP BYPASS
Engages/disengagestheeectsloop.The
eectsloopisengagedwhentheswitchis
pressedinwards.
3. EFFECTS LOOP RETURN
Returnsfromeectslooporoutboard
equipment.
4. EFFECTS LOOP SEND
Sendstoeectslooporoutboardequipment.
5 & 6. SPEAKER OUTPUTS
Connectoneortwospeakercabinetshere
using1/4”jackspeakercables.
Warning: alwaysensuretheoutputimpedance
selectorissettotheappropriateimpedancefor
theloadofyoursetup(speakercabinets).Never
usethisampwithoutaspeakerorload.
7. OUTPUT IMPEDANCE SELECTOR
Matchestheamp’soutputtotheload
impedance.Ensuretheampiscompletely
powereddownbeforeturningtheselector.
Theimpedanceselectedontheampmust
matchthetotalimpedanceofthespeaker
cabinet(s)beingused.Commonsetupsinclude:
• Iftheampisrunningintoasingle16Ωcab,
theselectorshouldbesetto16Ω.
• Ifrunningintotwo16Ωcabs,theselector
shouldbesetto8Ω.
• Ifrunningintotwo8Ωcabs,theselector
shouldbesetto4Ω.
Warning:failuretocomplywiththesepoints
maydamagetheamp.
8. MAINS SELECTOR
Matchestheamp’smainstransformervoltageto
theincomingmainsvoltage.Themainsselector
mustbesettothevoltageofthemainssupply.
Yourampshouldbecompletelypowereddown
beforetheselectoristurned.
Warning:foreachvoltageseng,thecorrect
valueandtypeofmainsfuseandH.Tfuse
mustbeed.Adjustmentsfrom230/220Vto
110Vorviceversawillrequirethemainsfuse
tobechangedtothecorrespondingvalueas
detailedontherearpanel.Formoreinformaon,
pleaserefertotheMains Electricity Supply and
Output Impedanceseconofthisguide.
9. POWER INLET
Thesuppliedmainspowerleadisconnectedhere.
10. MAINS FUSE
Thecorrectvalueofthemainsfuseisspecied
ontherearpanel.
11. H.T. FUSE
ThecorrectvalueoftheH.T.fuseisspecied
ontherearpanel.
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