Technics RS-DC10 User manual

Pl.lse tlla rnd u39 thlE supplement manurl togelhor
wlth the seralco m.nual lor Modsl No. BS'DClo' Ordor
No. AD9209339C1 (PP), AD9209340C8 (EB' EG' G).
Nol.: Thls supplEm€nt is intsnded to provide additlonal
lnformatlon or corrections lo lhe sxlstlng Seryice
manual lor Model No RS'DCI0 B€ sure to updat€
you. seryice manual for fuiure roforonce.
FOR USE OF ADJUSTMENT
!CONTENTS P.g.
cAuTroN r ...- ..... ....... . ... ......'. ....... . -... .... .-.. 2
PnEpaRAflOI FOF ADJUSTlrENT..... .....'." ..................".-..'., 3
EXAiIPLES OF PNOEIEXS WTIICH hEOUIRE
aoJusTuElr.......... .......'.......'.-..... a
wltAi You sHouLo Kllovv EEFoRE ADJUSTf ENT............'. 5
aoJusrilE[r .,...........". ....-....'........'.. 7
r. zrEc aoJusTlrENT............. ...................'..............'.'...'. ...'. 7
2. OPTITUM DCC RECOBOING CURRENT
aoJUsTf,El{T.. .-.. ...."...........' l0
3. t cc PLAYEACK LEVEL ADJUSTilENT" ...........". ........'... ll
a. ANALOG OUTPUT LEVEL AOJUSIUENT..'...'.'. --........ .. .. la
Sullir lo.
Modol No Area Colo!r
(PP) USAicaneda
(K
(EB Groai Brltaln
(EG) Gormany, ltaly and
Europe
(G Aala. Latin Amerlca,
Middle Near Easl
and Alrica
Prg.
5. CONFINTATION OF A'{ALOO OUTPUT
DtsToRTrota ^oJUsTfENT.........................----.....'14
oFoEF NO A@3072r09
RS.DClO
Colour
t(Kl---Jl""k'rlr" I
Aroa
6. OOLBY LEVEL ADJUSTXEI{T
,. ANALOG PLAYBACK FREOUEXCY
nESPOISE A}jUSTUENT.,.. ..........................,....,...... t6
s. TIPE SPEED AOJUSTf,Eilr...... ...-....,,.. ....,... ... .. .. .. 16
9. OUTCK REVERSE SEt{SO9 ADJUSTMETT ..............,........ 16
'r0. PLL ADJUSTmENT...... .... ..... 1f
fi. F.L. LEVEL I{ETEn SEN$rlVlTY ADJUSTI|ENi... .. .. .... 17
T2.DCCTESTF|XTUBESUaT..,,. ....,.......,,,,13
13. TnouBrEsHdorltc a ourcK sEFvlcE lNFoR lATloN zl
NOTE : Please put this Supplement-'l (AD9307210SO1 in the
place of Supplement (ADS212389C8).

RS.DClO
ICAUTION !
I Conn."t a wrist slrap (RFKZfiXr6) to the mstor's ground terminat. Always woat a w]tst
straP wh€n replaclng the haads or lnspectlng or repalrlng a P.C.B. to prev€nt electrostatic
breakdown. -q
Reai!tor
0 Mo)
plus. Fig. 1
p wn"n r9m1v]1s the head Fpc from the READ/wFtrE p.c.B., arways attach a shorting
clip to the FPC to prevent electrostatic breakdown.
.c
Head eo!'y
lnllallatlon gcDw
Hoad ass'y
FPC bqrd
(H.ndh ii c.r.lully )
Flg.2
l! u"" the unmagnetized adiusting screw driver (RFKZ0037) for replacing the head and for
AZTEC adjustment.
Cfhe head may be damaged by an oxternal magnetic field.)
lamlnal fo, m€e6ureoonl, bc aura
to use a powe, oord wilh 3-prong
C oullet
Ground te,mlnal
sl16p (RFKZ@35)
(Antl-stallc bracet6t)
**.""*^,*:ll
Msssudng lostrumonl
(Et: Dlgtortion Factor Mot.rl

I RS.DCI0
! PREPARATION FOR ADJUSTMENTS
. How to use Exlenslon cables (RFK20029, RFKZ0030, RFKZ0031) lor AdJustment
Extenrlon cable PCg loPcB
FFKZ0029
RFKZ0030
FFKZ0031
Main P.C.B. - M4h.nlEm Elock (JW02/05/OO) (S€e FlO. 3)
PASC P C E. - Rerd/Wrlte P.C.B. (S€o FlO.4)
Maln P.C.B - PASC Olgllal P C B. (S.e Flo. 4)
ffi"""*'''""u
Tr--r-Y'***
Orgital P C.B
Fig. 3
. Necessary Tesl tapes lor each adlustment
Part No Name Use
ozzcac lokHz Test tape AZTEC Ediu6lmeol
QZZCaO Mirror tape
RFKZ0033 OCC Blank tape Opllfrum DCC racordlnO curranl adlustmsnl
occ-s1 DCC Characteristlcs tepe DCC playb.ck lovel adiullmont and Error R.lo
ch@k
QZZCFtt ACC Tesl tape
AnaloC leedback adlustm.nt
Mlnlmum analoO outpul dl!todlon .dluatmcnl
Analog oulpui lr6quoncy re!9on3€
ch.racte,aslics edlustm€nl
RFKZ(x)38 Oolby level lape Dolby level 6dlustmont
ozzcwAT 3 kHz Test lape Tap€ spood adlultmcnl
J.06
Use FFt(zoo30 lz
Fig. 4

Hs-l,te ru I
. Necossary lools and measurlng lnslrumonts
lTooial
Unmagnotlzed adlusting er€w driver (RFKZq)37)
C0 player (EX: SL.PS700, SL.PS900 €lc.)
tMe;sr,Jinglnstrumontl-l
Oscilloscop€ (30MHz or Hlghe4
Olslorlion Faclor Meter
Frequency Counter
Electrlc Volt Mel€r (AC/OC)
IEXAMPLES OF PROBLEMS WHICH
Probl.n or Rcprlr nlqslrlng Adruslmnt
REOU!RE ADJUSTMENT
Adluslm.nt hm
ACC tape pl.yback lovel l@ low.
Dille.ent ACC lape plEyback tdol! b9tw6n
L.nd Flch ANALOG OUTPUT LEVEL AOJ.
Oilteront ACC tEpg playback lov.lo b€twesn
FWD and REV PLAY mod$.
Distorllon ln ACC tep6 pleyback output
DCC tsp6 pleybeck output drop-out.
Proorcm! prlrsordod on r DCC trp€ ,6motn
alle, ov.rr@ordlng on lhc srma tapc
DCC tape playbaok levol too low.
PASC Oigilel PC.B ha3 ben repalred du6 to
DCC playb6ck oulput dropout
FL l€vol mgler ha6 bogn rgplaosd. LEVEL METER SENSITIVITY AOJ
Molor, belt, or llywhel has b€en replecod
Splndlo Eqdo lslls lo l@kin.
-____- HEAD AZIMUTH AOJ.
r__l Boad/Wril6 P C B
H6rd replecement
o,..FFFFFFFF,,
ffi l---f I I Re6d,wrlroP.C.B.
rl
I I Ro.drwrlte P.C.a-
tt
1---J-
TAPE SPEEO ADJ
Oulck rdorsa machanish mallunctions ANALOG FREOUENCY RESPONSE AOJ

IWHAT YOU SHOULD KNO\it' BEFORE ADJUSTMENT
The DCC head block €mploys the AZTEC mechanism.
AZTEC plays an important role in stabilizing the running of the tape relative to the head.
Sido viow
FATG
The Flxed Azimuth Tape Guldance (FATG) has a diflerent shape above and below the tape.
The upper part @ ls the gulding surface for the tape's upper edge. The slanted area of
the lowe. part (9 is structured so that the lape moves itself upwards. The tape usually runs
along the upper guidlng surlace @.
When lhe head has been replaced, be sure to adiust the AZTEC.
x lf condlilon o or @ occurs, adiust the azimuth screws to obtain the correct position
(as shown in O).
Curllng
*"{nr'"-
O Head and laP€ hub aie corectly allgnsd.
Fig. 3
O Head is too high rolatlvo to lho tape hub.
O Head is too low lolalive to lhc i.pe hub'
Fis.2
I

I ns.ocro
o Fronl Panel
. Rear Panel
. P,C.B. Locltlon
@ BEAD/WF|TE P.C.B.
o PASC DtctTAL P.C.B
o rRAY P.C B.
(, MA|N P.C B.
4+1:
-t- .i.
@@
E _Etl-o'mm nm'I 6-@-
Flg. 5
Fls. 6
-6-
@
#
t-ri.spF,H 1--@ m
rlO@()llTrHixiEr
"l ooollo@pr@ --l-
Itl___-_r--t_ lan\
--------------- F lts

I RS-pc1o
IADJUSTMENT
Pr€96,ation! T.!t S.tup
Tools & Jlgs Mesurlng lnslrumcnt!
1 Mlilor l8p€ (OZCRO)
2. lokHz T6l l.Pr (OZZCACI
3 Unmaonotlz.drdlulting
scrow dtlvo. (RFKZm37)
,a W.l.t !lr!p (RFf\ZdXtr)
1 Oscllloscope
(30MHz or hloheo
FIX OUT(ANALOG) LCH - O8cllloscop6 CH1
RCH - Oscllloicogo CH2
Fig. 1
. Adlustmant StcPr
(1) Trlg0oronCHl.
izi n"iri*" rn" tape control lover lrom the tray mschanlsm'
Sprln0
Fig. 3
. Rough Adluslm.nt
rcTEFn
1. Uslng tho Mlror tapo (OzzCRD):
Adiu;t lhe Azlmuih scrcws so that th€ Mlrror tape
(oizcnO) runs orer lho c€ntor ol the heed'
2 Nol uslng the Mlrror laP6 (OZZCBD):
while pli'ylng back tho lokHz Test tapo (OZCAC)'
adiusi the Azimulh sct€ws to altain a peak on one
channel (ROH) onlY.
I
aln . P"k
1. AZTEC ADJUSTMENT
Fig.2
\E

R$DC,O I
. Flne Adlusimont
ITTEF-I Forrrrd rldc ldlu3tm.nt
To adlust ln th6 tomard diroction, us€ the rlght sldo Azlmuth
screw.
Oo not touch tho laft slde Azlmuth Ecrew (Flg.5).
1. Run the lokHz Test lape (OZZCAC) to ils mtddlo. Prsss a
fingor on th6 shaded area (@) and run the tape. (fo ksep the
cassetls trom floating.)
2. Whlle kEplng your llnoor ln lhe posltlon given tn Flg. 0.
Pr63s another tlnoor on th6 head ol lho Supply rcel c8p, and
tuh the right sid6 Azimuth sorew to tha riohi. (Controt the
rengc ol momanl to lho l6li and rlght ot th6 CHi wayotorm.)
. Adlustmenl Polnts
t0kHz T.rt
iap.
(ozzcAc)
Top viry o, tho haad tlod(
IEF;]
lC+mondtscdoq!d!
a,rc, frc,n tt !E.
Foilard Plry Azrndl slrr
Ftg. 5
O Stop the right side Azimuth screw at ih6
poinl where only the CH2 waveform
starts to move C. $-"'Qg,
Side vl€w
AZIEC Fig.7
@ Turn the Azimulh screw to the l€fl unfll
th€ point whero lhe wavefotm starls to
move in lhe opposite direction (0.
@ Turn the Azimuth screw to halfway
belween O and @. :fir'8" Fis. e
-6-
Refference flgure

I nsocro
I3T-EF-31 tethod ol Ye.lllc.llon
1. Connocl ih6 oscllloscop€ to ths AZCHK isrmlnal ot lh€ PASO DIGITAL P.C B (Fig. 11).
2. Plsyback lh6 OCC Characteristlcs tape (OCC'S'|).
l, tho pulss wldih shown is within 1soUsc, th€ adlustm€nl is good (Flg. l0).
3. otherwise, ro-adlusl rlarlino wlih |:@ (Fot3r to peoe 7)-
PLLADJ R/t45
Div: O2V
Swe6p; o sms
Flg. 11
ISEFTI Bevcrsr 3ld. rdruslm.nl
To sdiust in the reverse dlrgction, uss th6 lelt slds Azimuth
aorew.
Oo not touch th€ .ioht sldo Azlmuth scrsw (Fig 12)
. Adlustm€nt Polnt6
1. Reverse playback tho 10kHz Test tape (OZZCAC).
(Control thB lape wlth your flnoer.)
2 Whlle r€vorss playing and keeping your flnoor plessed on
the Supply re€l cap (to apply a load), turn the lelt slds Azlmuth
sc.ew as was done for the lorwald sld6 adiustmonl (Flg. 13)
Unmagnetiz€d
adjusling screw driv€r
(RFKZ0037)
Azimuth
screw
Oo adiustmonl bY lollowin0
steps O-O-
Flg. l3
3 The method ol vorlrication i3 also th€ sam8
Oscilloocopo rsngo 50uE.
Wlthln t50Us
B SIOE , ooooo o oo
ezixx g
POINT
PASC DIGITAL P.C.B,
Top vlew ol lh6 head block
LNttoftI
Keep magnelizBd objets
amy trm thls u6..
Rev€rs Play Azimuth scr€w6
Flg. 12
-9-
I

Rs.pclo I
Proparallons T6sl SotuD
T@18 A Ji06 MeasunnO lnslrum6nls
1. CD play€r & CO
2 OCC Blenk t.p6 (nFK2O(B3) 1. Osclllosope
(3OMHz or hlCh60 'ir- F,G7
UO
2, OPTIMUM DCC RECORDING CURRENT ADJUSTMENT (READ/WRITE P.C.B.)
. Conneol tho C0 playol output lermlnsl wllh fhe DCC rocordlng iominal (aiih€r anelog lnpul, dlgital input, or
opllcal inpul). Record th€ CD sound onlo lhe DCC Blank tapo (RFlgdl3il). Thls recordlng givo3 A-ilme.
lHow to do A.tlmo ocordlngl
o@
Pr.!s REW lo ,rylnd
thr llpe to thc !t!rt
po!ltlon Ro
DCC Blank
Tape(RFKzoo3:l) o
16
F9
6jtumu6
dnd indicdr
d h.l ot FPC
Flg. 17
Fig. 15
. Adluslment Steps
(f) Put the unit in REC mode using en unrsordod section
of the DCC Blenk lape (RFKZoogt).
(2) Adlust polentiomotsr R167 to obtaln the optimum
voltage on thg oulput lsvsl ot J15l
t How to llnd lhs opllmum vottags
The blas current indiceted on lh€ beck ot the FPC ol
each head is lound using lhe lollowlng lormula;
v=txF151 (120)
tElmpiaT
When lhe blas current ls 160mA:
V=160mA x 12O= !920mV
Y:5(hv
Xll 0!8
PreO€:Xl 0
Tho blaa currant ig
dllt€r€nl lor oach hoad
-lo-
Orcillacop.
lr-l
@- ff"xl -o

I ns-ocrr
(I) irethod ol Veilrlc.tlon (Must be performed alter adluslment.)
Ovemrile wilh another muslc source pari ol the sectlon lhat was rocoidod durlng ptspatallon'
First recordlng I
-------------- {
Flg. 18
[How to overwriteJ
Press R€W to r.wlnd
tha tapo to lh6 sta,l
posilion ru Prels PAUSE wh.n
A-Tlm€ r€acho8
lO a@onda q
PresE PLAY
(reord.noth€r
muslc source) t
(U) Verlllcatlon ltemB
Fl€wlnd tho taps and play il back, and check ths follouing at the breaks between tlacks
1. Check lhat A'Tim6 is playod back
(FBlls ll the rocording current is low.)
2. Chock iho Error Rai6
O Stop aft€r Ebout 25 seconds rlom lhe lape start poeitlon'
o Turn olf the pow6r so ihat ',ALL. EFF . RATE" is dlgpleyod ln thB ssNlce mod€, and play the tape
again. (Reter to page t2)
@ Conllrm thal ,,OO OOOOOOOO" remains on the dlspl8y, although the Error Fato iE momenlarily worss lhan
this at A'Tlms (5 seconds alter the lnllial 25 ssonds).
Press STOP
(Aller 20 s.conds)
- ll -

Repclo I
(III) Vl.wlng lhe'Error Rat."
(1) Senlng the Error Rate modo
1. Turn iho POWER ol' Whil6 plesslng both th€ sToP ksy and tho PLAY k€y, turn the powEn on
2. ISERVICE MOOEI ts dlspraysd.
r '+'+ -,r0123456799
( = )TAECDEFGIIIJKtMN
OPORSTUVWXYZ
are scrollsd ln oider.
Preas the COUilTEn key on the OCC sevan times.
ALL. ERF . RATE ls displeyed
Placo a prermordod tape lnto the machlna and prsss the PLAY key.
Ton charactars (numb€rs or lsllers) will be dlspleyed on th€ diBpl8y sectlon
Thls dllplay 6hows tha Er7or Rate on each ol E CH slgnsl tracks and tho AUX CH.
Ths signal drop-out condilion lor €ach channsl is dlsplayed uslng the hexedetmal dtglt8 G9, A.F.
(2) Error Rale acceptabillty criteria
AUrCH cH
00 t 23it5678
00000000
t
I
A
I
F FFFFFFF
Display Conditlon
"(xxx)omo" i6 constantly displayed for all tracks. Normal (OK)
"01 1010m" ls momentarily displayed foi any one to throe
tracks (or more). Normal (OK)
"11 1 11111" ls constantly dlsplayod tor one to thre€ tracks (or
mor€).
Anythlng but "0" lB dl3plryod. Error
"11111111" is constanlly displayed lor all lracks.
Anythlng bul "0'l! dllphy.d. Error
"FFFFFFFF" is constantly displayed for atl lracks. Error
- t2-
I

I R$oc1o
Preparalions Tesl S€lup
Tools f, Jigr Mea!urin0 lnatrumenls
r. OCC f.rl lrp. (t oc-ai).
2- Scrcwdrlver (-) l, Oscliloscope
(30MHz or hlghoo (Ex. 1)
Fig. 19
3. DCC PLAYBACK LEVEL ADJUSTMENT
(BEAD,WRITE P.C.B. or PASC DIGITAL P.C.B.)
. Ths purpose ol lhis adlustment ls lo leed digltal Eignals 8t the speclllod lovel lrom lhs DCC BF clrcull to th€
PASC Digllal circuii.
. AdJuBlmonl Stogs
(1) Play foruard lha OCC Trtt l.p. @CCSr).
(2) Adjust poiontiomster Rl35 so the voltage ai Jlogpin @ ls 1.2vppi100mV (Fig. 19).
(or BD MUX on the B SIDE ot lhs PASC DIGITAL P.C.B. will do (Flg.20).)
Div: somv
Swsp: l.Ozffi
2VP- p + 1g6rY
Adlust so thll lh. rveraCe lev€l
ot moro lhon llve out ol tho €toht
chann.ls ls 1 2Vp-pt100oV,
Flg.21
_ 13-

Rs.oclo I
4. ANALOG OUTPUT LEVEL ADJUSTMENT (READ'WRITE P.C,B,)
ANALOG OUTPUT TFr'EL AOJ
Rl01 (tch) iRlo2(Rch))
ANALOG OUTPUT DISTORTION AOJ
RlOg(Lch) {Rt l0(Rch)}
Fig.22
. Adrustmont Stops
(1) Play tomard the 315 Hz, 0dB t68t tono on th6 ACC T6st tape (AZZCFMI.
(2) Maximlzs output level wlth poientiomet€rs Rl01 (Lch) and Rl02 (Hch)
(3) Roduce outpul lovol by -lodB (optlmum output level) from lhe maximum level again with R10t and Rl02
READAflRlTE P.C.E.
,I
Test S€tup
Tools & Jios Moasurino l^slrumenls
1. ACC T..t l.p. (OZZCFtr)
2 Scaawdrlvar (-) l. Oaclllo.copo
(30MHz or hlgh.0
2. EvM (AC Range)
Fis 23
FrxouT( NALOG)
5. CONFIRMATION OF ANALOG OUTPUT DISTORTION ADJUSTMENT
(READ'WRTTE P.C.B.)
.Adlustmonl Slopg
(1) Play loruard the 315 Hz, 0dB t€sl tone on the ACC T68t lap€ (OZZCFM)
(2) Chsck lo make sure lhat THD is no great€r than 1.5%.
(3) ll THO is grat€r ihan 1.5%, adiusl the RlOg (Lch) and RllO (Rch) untll it ls within 1.5%.
T€EI SoIUp
Tools & JlOs Moasuring lnsirumenls
I
2ACC T.rl l.p. (OZZCFU) Screwdriver (-) 1Oscilloscope
(3{rMHz or l6!ie4
Olslorlion Faclor Mel6r
2

I lrs.uu r u
F.L. LEVEL METEF SENSITIVITY ADJ.
RL05 (Lch), nL00 lFch)
TEST POINT(DOLAY LEVEL ADJ )
AIALOG PIAYBACK FREOUENCY
RESPONSE ADJ
E644(Rch)l
{F646(Rch)l
LFTELAD.T.
R6s3(Lch),8634(Rch)
ADJUSTMENT POINTS ([iAlN P.C.B.)
6. DOLBY LEVEL ADJUSTMENT (MA!N P.C.B.)
. Adlultm.nt Stcp!
(l) Whllo playlno back lh6 Dolby l6vsl lape (BFKZ0038), adlusl the vollago al tost polnt J60l to 338mV uslng
nG$ (Lch) and R6aa (Rch) (sc€ Flo. 25).
Proparallon! T.6t S.tup
T@ls & Jlos I instrum€nts
1. Oolby l.vel tepe (RFKZ0038) I EVM (AC Rano.)
t
-15-

Rs.ocro I
7, ANALOG PLAYBACK FREOUENCY RESPONSE ADJUSTMENT (UAIN P.C.B.)
Praper.llons TGI Setup
T@ls A Jigs Maasurlng lnstruments
1
2ACC ?..i l.p. (OZCFiii) Scrowdrlver (-) 1
2Fr€quency Count€r EVM (AC Range)
. Adjustmrnt Sttps
(l) Play the tkHz End (xlHz lesi lonos on th6 ACC Tasl rrp! (OZZCFM) 8nd adjust potenliomolGrs ROls
(Lch) and R6a0 (Bch) unlll ihs FIXED ouT outpui lev.l at fil Hz ls within 0 r0/ - 1 dB lrom thst et I kHz.
(2) Play th€ lkHz and 12.5kHz lesl tones on the ACC T.st llp. (OZCFll) and adlust polontlomst€rs Ra43
(Lch) and R64,1 (Bch) untll ihe FIXED OUT oulput l6v6l at 12.5kHz ls wlthln 0r0/-1dB from at 1 kHz
Nol[:
. Ourlng adiustm€nt, monitor playback frequency with a Frequ€ncy Counter
. Mlsallgnmont wlll atfoct thc ACC Test tape (OZZCFM) playback frequency rosponse
8. TAPE SPEED ADJUSTMENT (TRAY P.C.B.)
arations Tesl Setup
T@lo & Jlgs Measuring I
1. ACC T.3t tap. (Ozz'CWAfI.
3kHz - 1odB
2,Screwdriver(-)
1 Froquency Countet
. Adlustment Stops
(l) Plsy foMard the 3O00Hz tosi tone on the ACC T..l lrp. (OZehrATland adjusl th6 sional lroquency at
lhe FIXED OUT lack lo 3000Hza l0Hz with potentlomster RSO2 (See Fio 29)
(2) Pley backward the 3000H2 test looe on th6 ACC T.rt t.pc (OZZCWAT) and adiust ihe signal froquency at
the FIXED OUT Jaok to 3000Hztl0Hz with pot€nllometor RSIIA (See Fig 29).
9. OUICK REVERSE SENSOR ADJUSTfI,ENT GRAY P.C.B.)
.fho purpose of thls adlustment is to set EOT s€nsor's sensltlvity to the magnetic and leador portlons ot
caslett€ tapas (qulck r€verse senso.)
. Adlushent Stepg
(1) Play th€ leader tape portlon ol an ACC Blrnk l!p. (MAXELL UD-IgO) 8nd adjust lhe polentlal dilterence
bolw€en JW32 and R03l to 1 V with potentlomeier R036.
Proparalions Tesl Selup
T@ls & Jlgs M€asualnO lnslrumenls
1ICC Bl.nl trp.
(fAxELL UD.r00l
(commcrclally .vall.ble)
Scrowdrav€r (-)
l. EVM (OC F.nO.)
Fig.27 l- |
(S@ Fig.25)
/;;P
-i@i@
I
\ mv p c.e. lP
\ *'f,1'
- 16-