AE^1",'J#""'F*"
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Ratins
i "".*1
li-5Lnso'"+Tnrrraillp;c.v.n,r.- rnrc israseolust* -Fjg: ---noiu.trotn",1
lation level ]TP6 ] LMaximum
(VR107) lt-t tO oscitlation
' Set
VRl 19and 12Oall I 1
output is
I the way to the teft. I t
;;;;r.
OUT ,TAPE (RECat minimum), set lFi102 (R) i 13mV imize
biasleak.
I I I BIAS ADJUST to maxi- I l
, 1 mum and measurebias I i I
I leakat LINE OUT when I i I
--- -] -t- - -- -l 4t"" i1I tt t""ilt --l-- - tlrililnu'n'
3 ,BrAS
LeakMErAL
ir-rruE
nc.v
ru. tIFg_ IHL;;tflttpe["d -[:19119q-!3;,1.r';; -lnJr,"-'"
*.rn,ni
ll
I I I recording
and monitoring I I
AC-223
INPUT LINE A.C.V.M.
lsrcNnr- T
(1
kHz,
1
0kHz,
-20d Bl
simultaneouslv{TAPE
mode)by using
a metal
the standardlevel)
3-rRecord
the signaland
adjustso
that the same
levelasthe above ilr
level
is
obtained.
I
rRecord
andplayback
a
l kHz (-20d8) signal
and read
the level.
Recordand playback
a
10kHz (-20dB) signal
andadjust
so
that the
same
level
asthe above
:-!,
level is obtained
SetMETAL (AC-712)
and
DerformBIAS TEST.
Frequency
response
shouldsatisfy
Fig.
N.
I'l''ir'rili.
i
i"ii.ii
r*
lguency
is
used
for
adiustment.
Bias
],,191":l"l
may
indi-
Each
adjustmentin
Steps4and6should
becomplited.Con-
I simultaneously
{TAPE I I
I I mode)by using
a
metal I I
litape.li
rrllltane'il
ia-n""*Ji"s-iara-firvF-e.cl.rv. inic l,r,s"wilrgl"aiio "s
-ft*iri lr_jlto.sae
- ---rh;;r.
I Levet ilNpuT OUT TAPE 1 themidpoint. lVR1t2 (R) i lthis
unir
(Through) SIGNAL ___-NR-+ ,zApplyalkHzsinewavel (equivat,
i L ,(lkHz, iLtNEtnudio oFF I sisnal
from
LINElN so I i vn). tt
t i 1-20d8) jlN ifrequency I I that
LINE
OUT
voltage
I L used,stir
i I I j
osilaror i I is
36mV
(-29dBV). I lin
revetr
* "r-l
) 4 Becording tAC-712 ILINE A.C.V.M. REC 1,'r,SetVR119and
120as lVR11l {L) 10.5d8 Thereferencetapeof ]
Level INPUT OUT TAPE the midpoint. lVR112 (R) thisunit isAC-720
(Throush) 9]9.ryAL -- -ryl_* ,zApply-alkHzsine-waveI (equivalenttoTDK. I
ilii
(equivalent
to TDK- {
MA). lf other tapeis j
used,slightdifference j
in levelresults. I
I 1(Through) TSIGNALT___ -L______lNR-+ jZAnOlvalkHzsinewave | (equivalentt,
i L ,(lkHz, iL|NE tnudio oFF I sisnal
f
rom LINE lN so I i MA). lf othe
I i 1-20d8) jlN ifrequency I I that LINE OUT voltage i used,stightd
t i 1-20d8) 1lN lfrequency I I that LINE OUT voltage I i used,slightdifference
i I t lositlaror i l.'ts36mv.(-29dBv).. I ]inrevel
results.
A
I
1.
I
i i i l''1:::t'.ii;:l1ti#"ll
i i i issfxt.,lfifi:i*n'^l
I i I Iswitched. I
_---T---r.f-_
jHecorolng A.v-ttz LINE lA.U.v.M. iHEU l.l.Uonlrrm
tne lKHz re- LVR119 (Ll I Frequency IASORBiT signalis
jBIAS TINPUT OUT I jTAPE ] cord/playbacklevel VR120 (R) response lltHz and 10kHz,
use
(METAL)
ls-tGNALI I i}1. i.^lsl"g
1): I tloulg
saj- iql.kf
, sisnar.and
a
I I I i"iii"t'"a.' I I i i
l=:--]--- -i=----- i' i .- --+----f:- -f- - --r -----1
5 Recording AC-712 LlNEIA.C.V.M. REC lil.Applya lkHzsinewave 1VR121
(L) l+0.5d8 Eachadiustmentin i
Level
(dbx) INfUT OUT I TAPE I signal
from LINE lN so ,VR122 (R) step
4 shoutd
be I
i]9.ryAl__-_t_______ry.R* ] thatLI.NEoUTvoltase
I "ompteted. I
{1kHz, jttwE
laraio rdbx I is36mV
(-29dBV). I 1 l
-2odB) I
lN lf.equency ,
z
Recordthe signaland 1 I
losillator ] adiustsothat thereis I I I
j I I I I notevetdiffersncewhenl I l
I I I I I sounce/rRpeis 1 I I I
r j I I I li*it"t'J I I ]
r
^r^ - '-
- '':--;+rrruEincnnn
il^;:_
-l*"t-frtirH.[- ty.ltgttlir.o*r"u ]l,p"rt!,rrr,,
--1
6 Recordins LC^/12 lTnPe cord/playbacklevel VR120 (R) response jttHz ana 10kHz,
u
iNR * I (Step
4). I shouldsat- la lkHz signaland
a
ritH.,
- 1 | lcjir ]:a,h-""5.i'uno
prayback
a j ;;;;";js.t ]iriti, '"""
*r'"'
lokHz, I 1 I j 1OkHz(-20dB) signal I fad.iustinsrecording/
i-20d8)
i I I l:*""i1::l::,*"":*:"1 I l*::l::li::':::-:v
samelevelasthe above I ]response
andconfirm
:1r
level
isobtained. ] lthat eachrating
is
1 I I I I 1 I I lcateanerror'
i__f __.____ ._+_ +_ _l ) _
j z jRecorarns
lnc-sr-l-trvEfAcv.rvr.
-fnrc--fr-,n-"o,oi"alt"yb;.k; ivnrrs
(l-)
lFreque"cv
lAroneirtig"ar
"-
i lPlf, ,lT:llT,
iourI irner I III:^hr-g9?l:1911
rvRl16(")
li:'el'.-^ illl:,:{_19,k1.;
y*
(CrOr) SIGNAL t I J and readthe level.
(A lshould sat- a lkHz siqnaland a
- (1kHz, -LtNEIffiio -- I ' slight
differenceresults ]
isfy f ig.tvl. ]tokHz oni when
1OkHz, lN I
f.eouencv ] as
record/playback
level i 1 'adjusting
recording,
1-20d8) i l^";ri.'^,' i I of thisunitissettoAC- i i lolavbackfreorrencv
lN I
frequencv ] as
record/playback
level
i I 'ad,usting
recording/
'ositiator ] ofthis
unit
is
set
to
AC- : lplayback
f
requency
i I i I 712.1 i I lresponseandconfirm
i ] i lrZlapply
a 10kHz
signal i I ithat
eachrating
is
i I 1 from
LINElN so
that I I lsatisfied.tfother
LINEOUT
voltage
is i I lf
r."qr"n"y
isusedfor
36mV
(-29dBV:vol- I I tadjustment.
Bias
indi-
tage
20dB
lowerthan I I lcator
mayindicate
an
Recording
IBrAS
l(Normal)
REC
TAPE vR1 17 (L)
vR118 (R)
BIAS Test
(LOW)
BIAS Test
(H
igh
)
BIAS
TEST
REC
BIAS
ADJ
Center. VR109
AC-112 TP3 A.C.V.M :O
t S.V