Denon S 52 Service Manual

Page 2

SAFETY PRECAUTIONS

LEAKAGE CURRENT CHECK

bord is iess lnen 450 kahmsc lne unn e dedeclive

LASER RADIATION

The IoIlowmg eneck sbould be penonned for lie cominued proleclion ollne buslomer and service leonmcian

aeioie reiurmng lne unit to lne cuslomer, make sure you make eilner ill a leakage currenl cneck or (2) a line to cnassis
iesisianee meck ll lne leekage cunenl exceeds a 5 milliamps, or if lne resislanoe irom cnassis to eiiber side ollbe pwev

Do nor slare inio beam or view dirediy wnn opbcal inslmmenlsc class 3A laser producl

Please heed the points lisied below during servicing and inspection.

© Heed the cautionsI

Spots reguinng panisular anenliori wnen servicing sum as
lne cabinet pans, chassis, elc , have camions indicaIed on
labels or seals Be sure to need lnese camioris and lie cau
lions indicated in lne bundling irislmclions

©Caution concerning electric shockl

up An AC voliage is impressed on me sel. so ioucrung inier
nal melal pans wnen lne sel is energized could cause
eiecine snook Take caielo avoid elem: snow, by «or ex
ample using an isolabng lmnsioimer and gloves when
seruieirig wnile lne sei is energized, unplugging lne power
mm wnen replacing pans, elc

(2)1nem are nignwnege pare inside Handle wibi exlra care
when lne sel is erergized

© Caution moeming disassemny and assembM
Thuuuh grean care is taken wnen manulaebinng pans irom
sneel metaIi meie may in some are eases be burrs on lne
edges oi pans wnicn could cause injury n fingers are moved
across lnem Use gloves to pmlec1 your bands

©Only use designaed parts!

The seIs pans nave speciiic saleiy prcperries inre resis
lance, vellage iesisiance, elc i For replacemenl pans be
sure be use pans wmcn nave be same pmpenies ln panicu
lar iorrne imponanl salely pans lnal ere marked Aon Wiring
diagrems and pans lisls be sure to use lne designaled pans

©Be sure to mouni pans and arrange lne
wires as they were originaliyl

Forsaieiy reasons, some pans use Iape, lubes or olner insu
laling malenals, and some pans are mourned my born lne
sunace of prinled cueuil boards Care is elso laken wnn lne
posibons oi lne wrres inside and clamps are used to keep
wires away lrorn nealirig and nignvoliage pare, so be sure to
seieveryining back as I| was onginalIy

© Inspect for safety after servicingl

cried< that ell screws, pans and wires removed or diseori
necled ior servicing nave been pul back in men original posi
lions, inspem lnai no pans around me area lnei nas been
serviced nave been negaIwely zflecledc oonducl an insulabon
cbeck on me exiernal melal conneclors and belween lne
bledes oi lne power wage and olnerwise cneck lnan salery is
ensured

ilnsulanen check piocedurel
Unplug lne power ceid from lne power oullel, disconnecl me
anienna, plugs, elc , end bun lne power swilen on Using a
bow insulanon resislanoe leseer, check maI lne insulalion re

smance between lnelenmnals ellne power plug and lie ex

lemally mined melal pans (anlenna IslmlnaL neadpnories
Ielminalc miempnorielerminal, inpuilenninal, elc > is mm or
grealer ll n is less, ms sei rnusl be inspecled and repaired

Concerning imponain safely pane

Many oilne elecinc and sirudural pans used in lne sel nave
speoal saieiy propenies ln mosl cases lnese propenies are
dilnsull Io disnnguisn by signi. and using replacemeni pans
wiin nigber rarings (raled power and wilbsland uoilagel does
nol neeessanlyguaraniee lnal saiecy penonnance will be pre
serued Pens wnn saieiy propenies are indiraled as snown
below on lne wiring dizgmms and pans lisls is bus service
manuel Be sure lo replace mem wnn pans wim lne designal
ed pan number

ii) Scnemaiic diagrams lndiceied by me A mark

(2) Paris lisls IndilzIed by lne A mark

Using pans diner men lbe designated pans
could resull in eleeriic snocki iiies or olner
dangerous snuabons

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