Akai 1700 User manual

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IASTE OF CONTENTS
I spEctFtcAnoNs.. .....'.....'......
I
I HOW TO A.TEASUREDESIGNATEDVALUES
OF
SPEC|F|CAT|ONS..,...... ..............' 2
I tocafloNoFcoNlRor.s
..... . ..........................,
3
IV DrsAssEMrLy
oFtApETRANSPoRTuNtTs
ANDAMPL|F|ERS......... ......... ... ,l
v TRANSPORI
MECHAN|SL ............... 6
IJ ADJUSTMENT
OF
TAPETRANSPORT
UNIT
................."..
9
II ADJUSTMENT
oF
al4pr|FrER
....................................'10
rlf r,{A|NTENANCE
pRocEDURES.. ............. .............It
X( Lrsl
or REPLACEI ENT
pARTs....................................12
X ExpLoDEDvtEw
oF coMpoNENt
p^RTs..................,.1,4
xI TROU3LESHOOTTNG
CHART
................,..............,.21
n scHEfiATtCDTAGRAM
.,.....,............,..'.................25
xI CoNNECTINGDfAGRAl.r
...................-..--.-.-.-......-.26

SPECIFICATIONS
MODEL
NUMBER
wtrGHT (NET
IN CARTON)
DIMENSIONS
POWERRE-
qUIREMENTS
POWERCON.
SUMPTION
RECORDINC
Akai Modcl 1700, portablc 4-track
st.rco tape rccorder.
33lbs (15 kg)without acccssorics.
t3-t6' lH)x 13-%' (w) x 9' (Dl case
A.C.100,ll0,120,200,220or240volts
interchang€abl€.5060cycles.
80VA.
Inline 4 t.ack st€reoand 4-tfack mon-
Inlin€ 4.tiack stefeo,monaural play-
Thrce speeds
cmland l-%" (a.is cmJpersecond.
(15"
p€r s€cond with an optional accessory
capstanand pinch whe€I.)
SYSTEM:
PLAYBACK
SYSTEM:
TAPESPEED :
.I'APE
SPEED
DEVIATION :
WOWAND
FLUTTER :
TIME
FRDqUENCY
RDSPONStr
DISTORT'ION
SIGNAL-TO-
NOISE RATIO
CROSSTALK
CHANNEL
SEPARATION
Less than + 3 pef cent at all tape
Lessthan0.2
% at 7-t6ips.R.M.S.
Lessthan0.3
% at 3-7aips.R.M.S.
Lessthan0.45
% at l-16ips.R.M.S.
FAST FORWARD
AND REWIND 150secondsfof 1,200ft. tapc at 50
cy-
cles
and 120
s€condsat 60cyclcs.
40to 18,000cps.at 7-%;ps;
.L3db.80 to 12,000cps.at 7-l, ipsj
+ 3 db.80
to 10,000cps.
at 3-3la;ps;
+ 4db. 80at 4,000cps. at l-7sips.
Within4%at l,000cps,oVU
ltotal
40db belowrccordedlev€lsignal at all
Within 55db betweeneachtrach.
Betterthan
80db at l,000cps
+3 VU.
POWJ]R
INPU'I'
LDVELS:
POWDR
OUTPUT:
Microphone ir)put lcvcl
-55 db (VR.
max.jat l,000cps.
Phonoand radio input levcl
40db (VR.
max.)atl,000cps.
Pre-Amplifier output, 0.7V at 1,000
cps,impedanc€
morethan l00K ohms.
Mainoutput,34dbm.
up
(in
600ohmt.
More than
50MEC ohns.
Morethan
orem;nuteatA.C. 1,000V.
With headphor€ during reco.ding.
Condenser start;ng induction two-
l/l00HP. Power
factor,70
pe.cent.
2,900
to I,450
r.p.m.at 50
cps,
3,480to 1,740
r.p.m. at 60cps.
lnline +tf ack
stereo/monau.alrecord-
play h€ad;
Impedance..
.3,500
ohms + l0 % zt
I,000
cps.
4-trackerasehead
;
Imp€danc€.
..4,000ohms
+15% at 90
Round dynamic micropho.e
Impedance...50,000ohms
S€Dsit;vity... 55db.
f.€quency R€rpoDse...70
ro 15,000
Two 5'x7' dynahic speakers.
Imp€dance...8
ohms
AllowableIDput...6
warts
Frequency R€sponse...8oro 12,000
cps,
:!l0db.
I2AT7
x2, 6BM8x2.
l50Dx2
Up to 7' r€el
INSULATION
RESISTANCE
INSULATION
YI[,LD
STRENGTH
MONITORINC
SYSTEM
MOTOR
HEADS
MICROPHONE
USED:
SPEAKOR
INCLUDED:
TUBESUSED :
SILICON
DIODEUSED:
REELS
USED :
RECORDING
LEVEL
INDICATOR : Horizontal,
A-model
VU m€te..

1I IIOW
TO NIICNSURE
DESIGNATED
VALUES
OF
SPECIFICATIONS
TAI'I] SPDtrD
DEVIATION
:
\{OW AND
FLUTTER
:
Reco.d the l,000cps. sine curve of
the tap€ speedat rating sp€eds
with
a standa.d sound recorder (AMPEX
351A, for instance)
which is little af-
fccted by lhe tape sPecd deviation
tlrroughout the whole i€ngth of the
tape. Put th;s standard taPe on th€
tapc recorder unde. test for playing
back, and nreasure its outPut bY a
couDte., then codvert thc value into
rating power frequeDcy to cvaluate
the tape speeddcviatior.
Fo. a rough measurement,the taPe
spe€ddeviation can alsobe measured
with a testing tape for speedby astop
Playback thc 3,000cpssianda.d tape
that guarante€s
wo\dand flutter with-
h 0.07
p€r cent,aid read the effect;ve
valuc otrwow mere.
Since
the sedsibility of wow and flut-
tcr frequency bclow 2cps and above
5cps.d.ops,the frequency over 5cps.
is put to 3db/OCT circuit,
and th€
frequency bclow 2.ps. is put to 6db/
OCT circuit for adjustment This ad-
justed value is called auditory com-
Connccr to thc input tcdninal of the
rcco.dcr, .ccord a sine curve swecp
f.equency at 100cps -10 db. from
Audio frequency Oscillator.
Adjusl toDe volume to flat, playback
the tapeby .onnectidg VTVM tosp€-
aL€rout put then read the frequency
response
to adjusl a maximum devia'
}.RLqUI]NCY
RESPONSE:
(OVI]RALL
I'REqUENCY
RESPONSE)
TOTAL HARMONIC
DISTORTION
FACTOR: Provide the input terminal ol the
,ecord.r with 1.000.ps.
':nF ,urvF
signalsand .ecord thesesignalson a
recording tape at the zerolevelonthe
recorder's
VU mete.
Then playback the siSnals
under the
no.mal recording condit;on to meas-
u.c the distortion factor by an oscil
lator. Remove the recording tapc
from the recorder,
then read the noisc
lcvelon theoscjllator
to 8ct therequ;r-
€d dhtortion factor by the following
formula:
d0:d-dl d2
d0..required
d...overall distortion factor
dl...noise
l€vel
d2...disto.tion
factorof theoscilla-
to. uscd
SICNAL TO
NOISE: Playback the sinecurve, 250cPS.
tape
rccorded on a standard recorder on
th€ reco.derto measur€
the voltag€
Removc the taPe, then measure the
noisc level under the samecondition
Calculate the ratio between the two
in d€cibel.
OUTPUT: I'layback on the recorder
thc 1,000cps.
sine curvc tape which was record€d
at the zero VU level on a standard
recorder. T€rDinatc the test recorder
with €ight ohms.
Square the voltag€ rcading, then di
vide the figure by eight ohms to get
thc r.m.s.
Powcroutput.
CROSS TALK: Record 1,000cps.
signal at +3VU on
the third tack, then playback this
signalthrough a l,000cps. Band Pass
Filter.
Compare the output of tracks I and 3
in decibels.
2-

f
ILOCATIONOFCONTROLS
@
@
@
(D
(D
o
@
@
o
o
o
0
@
@
o
o
@
o
@
o
@
@
@
(D
(D
@
@
Supply rccl shaft
Cyclc convcrsionswitch
Capstanstorage
post
Tape guide
trras€
head
Right channelvolumc control
Right channel tonc control
Left channcl microphone input jack
Right channelmicrophone input jack
Left channelvolumc cont.ol
Left channel tonecontrol
Speed
changeswitch
Take-up reelshaft
Capstan
shaft
Pinch wheel
Automatic stoplever
Record/Play switch
Rewind/FasFforward switch
Record safetybutton
Automatic stopswitch
Stereoheadphonejack
VU h€ter conv€rsionswitch
Track s€lectorswitch
Cycle conversionsw;tch
Hum adjust (right)
Speakeroutput jack (righr)
Speakeroutput jack llert)
Voltage sele.torswitch
Preampoutput jack (right)
Preamp output jack {left)
Phono/Radio input jack (l€ft
Hun adjust (left)
Phono/Radio input jack (rish0
3

I\I DISASSEMBLY OFTAPETRANSPORT
UNITS
& AMPLIFIERS
ll l-oo!',,rh. ltl:.1.\I\ lN(; SUIlll\f irlof I'INCIt R()L-
LI{l , ,lt-'.. ,\vl,v ," !i
ih. l'IN(ill lt()l.l.l lt llil.
13)
L,{iJ.! thcS(lltli\\'S nrxrl.(l 1,,,))
r.rir(j
t{ll
i,r
('(1,.r
ro
r.!!^! l)1'lCK
l).\\l.ll. tl)1.
12 l.(.,,,,tr| tlx.I)llUK C()\ l R()I-ti\( )lls
ialrndiblby
io,!c,,i,ig d,cif ritx;fing s.raL. u';i)g r I)liillips
h.adcd
o
99
r.t
I
('11
l.oosci
(h(i
S(iltl:,\\'S,,)rrk.d
f,or) i.t r,)
ktr.
I

(5) Loosenthe SCREWS narked from {a)
to (d).
Lifl TAPE DECK and
cabinet (B). AMI'LIFIliR (Dr tr"m ,he
(7) Disconnectthe PINS of speako marked {a)
and (d), the
PLUGS or motor marked (€)
and (f) and the PINS of
headmarked {B)and {j).
(8) Loosenthe RETAINING SCRDWSof dcck frame
mark€d
from(al toid)
(9) SEPA'AIC
TAPE DtrCK (M) frOM AMPLIFIER (A).

YTRANSPORTMECHANISM
Driving of Capstan
Fjgure l. {Aj Motor
(B) Driving Belt (flatbelt)
(C) Capstan
(D) FlYwheel
High-speedrotation of Mot / (A) isreduced by D/trire'
Br, (B) and transmitted to Capstan (C),
which isconnected
to Flywheel with ample inertia and €nablesrated rotaiion
by absorbingmino. rotation distortion ofDotor itself.
CapstanRotation 606r.p.m.
at 7-%'(l9cn)pe. sec.
303r.p.m.at 3-%'(9.5 cm) per sec.
l5l.5r.p.m, at l-16'(4.7s cmlper sec.
Motor Rotation 2,900to 1,450r.p.m.at 50cps.
3,480to 1,74{r.p.m.at 60cps.
Fig. I
Driving of Pinch Roller
Puttapebetweenrotatingcapstanand pinchroller
and
pushpinch roueragainst
capstan,
thiswill transport
thc
tapeat rat€dspe€d. Th€ appropriatepressureof pinch
roller is betweenI,000to I,150
gramsat the tape sp€ed
of 7-%' (19cm) pers€cond.
R€coding and Play Back
TuJ[ rheRECORD,PLArB,4Cf knob
(A)to "PLAY"
position, and pinch roller pressesagainstcapstanto move
tape at the rated sp€ed. At the sametime, Idlel (B)
moves
between Motor &tshitag ICI znd t}:'e Tahe-Ut Reel Spindle
lD) b rr^ns'lr.it the motol /rldtro, to {D) so that th€ tape is
moved and wound on the take-up re€I.
The Tak€-Up ReelSpindle Baseis made up of two plas-
tic rollers(l and 2lwith a clutch felt in betw€€n.The ldler
is rot^titg the plastic mUel (2)under. Therefore, the tape-
winding friction is adjust€d by the slipping of the felt to
enabl€rated winding of the tap€.
on the other ha d, the S*pfb Reel Sbtndle IHI h^s a
Blake lo e/ lEl hwg on the Plastic Roll€r {4)under which
provides
app.opriate back tensionby the .lutch fet slipp-
ing to the rotation ofthe Pull€y (3)above.
To prevent accidental er^sure, the Record lnterloch But-
to, (F) mut be depressed
before the RECORD, PLAY-
BACK knob can be moved to the "REC" position. The
Safet! dnice lclls depressedto ente. the record mode
(See
Fisures2and 3)
ffi
\ir
Slipping Rotation
Fig. 2
-6-

f
FAST-FORWARD MECIIANISM
TurD lie aASZ FWD-REWIND *no, (A) to "FAST
FWD" position,and ll's ca- (B) undcr lhc knob pushes
up
the Lerer (C). The l.tler (D) moves into the spacc
bctween
thePlast c RouerlF) above the Take-Up Reel Spindle and
the uppe. part of th. rotating motor drive bushing to
transm;t the motor rotat;on to thetakc-up reel spindle. At
the same tihe, Brale RoUerc
lH) and (I) cone otr the reel
sp;ndleto free
lr, Srrrl! ReelSti dlelcl,rheteby allowiDT
fastwindnrg ofthe tapc onto thc iakc-up rcel.
(Sec
ligures 4 and 5)
FreeRolarion Fl;gh-SpeedRotation
Fig.5
Fig.4 o
REWIND MECHANISM
"f
utntheFASTFWD-REtl/N, izo, (A)ro
"REWIND"
position,and thecamlB)u^det$e k\ob ptshes
theLeuer
lC)up. The
ldlerlDl noves intothc space
betwecntheup-
per part of the rcIatingMotar dtue bushing
lE) andthe
InternedatePulle,lF) to hansmit
thehigh-speed
rotation
of themotorthroughtheinterm€diate
pulleyto tr? Srrrll
Reet
Spindte
lC).At the
sahetime,Brale
Roll€ls
(H)
and
(I)
comeofl the re€lspindleb treethe
take-atleelspindte
lJl,
ther€byrewindingthe tapeinto rhesupplyreel
ar a fast
(See
F;surcs
6 and7)
High'SpeedRotation
Fig. 7
'J YO
o
(a)
sToP o o
(b)FAST-FORWARD o
(.) REWIND o o
Id) RECORDING o o
STOP
CONTROL
Push ihc stop lever to "STOP" positlon, Bruke Ro els
{A)and 1B)
depres reelspindlesto stop.otation of the reel
sp;ndles.
As thc brake rubb€r depfessesthe plastic rolleG under
the .eel spindles,no triction works on the tape its€lf.
Supply R*l Spindle R*ind ldle$heel Take-up Reel Spindle
NOTES : x -marksindicates
"open" and
O-ma.ks "engaged"
fig. 8
7
('

RDCORD/PLAYBACKCIIANGING MECHANISM
By turning the RLCORD/PLAYBACK KNOB (N)to the recordingposition,thr LEVIiR 1a)pulls
the RECORDING
LEVER (bi and (c), as
;llushatedin dotted l;nc,
then the RECORD/PLAYBACK CHANGD SWITCH (SWl)turns
to .ecording position.
If the LIVER (c)do.s not turn
Then must adjust
the LI.VIR
propc.ly. SWI docs not operatc prope.ly so may occu. the abnormal oscillation and
(cl
to properposition
by loos;ngthc SCREW lcll.
.
r il.', - ,z--\
Itz__\,/..r',
'l-a1'1';': ,
.'/...
(//
,,-^:,.. ,/
\l/ /
..)._u.
.
,4)" _
JWt

r
U ADJUSTMENT
OFTAPE
TRANSPORT
UNIT
1. ADJUSTMENTOFPINCII WIIEEL
It is imporlant that the piich wheel shaft i5 kept nr
complctealignmentwith
thecapstanshaft.
A properpinch
wheel pressur€ is bctween 1.000and I,150grahs whcn the
unit is ope.ated at the tapc spccdof7-t6 ips. Any devia'
tion from this specificalionwill result in wow and flutter.
Check I'in.h wheel pre"su,.bv r .1-.ring
'cale at.d. if
r,ecesar
y.ad
ju"r
rhepin,h whpFl load5t.inB.
2, ADJUSTMENTOF
TAKE.UPIDLERWHEEL
The take-up ;dlm wheel must be kcpt in complete align-
ment ltith thc takc-up reelshaft. Whcn the unit is setin
fast forward condition, thc idler whe€lwill contact to the
upper knu.led wheel of the takc-up reel shaft assembly.
and it will contact to thc lowerknurledwhccl du.ing record
or play modc. Adjust idlerwhccl loadspr;ngsoihatlhc
idler wheel pressurciskept between50
and 80grams. The
;dler qh..l rapidlv wear. :f Ihf pre*u,. b Px,.ssi\c.
The slippage occurs if thc prcssu.e is smallef thaD the
3. ADJUSTMENT
OFREWIND IDLER WSEEL
The .c\rind idler whccl must be kcpt in complete align-
mcnt with thc rewi.d reelshaft. The amount of pressurc
to the k,,urlcd motor bushing should be maintained about
50gfams during rewidd ope.ation. Adjust both thc idler
load spriog aDdrewind roller.
4. ADJUSTMENT
OF
INTERMEDIATEWHEDL
Thc intcrnediatc wheel is located between the rewind
idler whccl and thc rubbe. ring vhich isuscdon the uppe.
part of the supply reel shaft assembly. When the unit is
sct in rewind mode, it will contact to thcsc parts sihul-
taneously deliverins torque of motor. An adequatepres-
su.cis50grams.Adjustthc loadsp.;ngofthcinrermed;ate
wheel if the pressureisnot sufrc;ent.
5. ADJUSTMENT OF TAKE-UP REEL SIIAI'T
ASSEMBLY
A felt clutch mat.rial is attachcd to the bottom sid€ol
the reeltable bascplat€ sothat reco.ding tapc w;ll not bc
stretchedduring lhst forwafding operation due to excesivc
tension. To checkthe amoudt of friction of this part, plac€
a S'inch reel
with fecordins tape wound by 60m/m in
diameter,and gently pull the cnd of tapc upwarcl usinga
springscale. Adjust the conical sp.ing sothat thc amount
of tension at this part will bc kept between 400 to 500
grams. Anoth€r felt clutch matoial ;s attached to the
takc-up drive wheel. It isto pfovide proper slipping opc-
ration du.ing record or play modc. The procedu.e for
checkins friction of this part ; sameas
the foregoing,and
between 120and 200grams of frictioD will provide the
best result. Adjust the star-shapcdspring jnst under the
takc-up dr;ve whcel. lvhen the unit is set in rewind
mode, the amou.t of f.iction of this part will greatly be
reduced and \viil become I0 to 20 grams. Check to scc
rvhether this issatisfactory;f iot, readjust the star-shaped
spring fo. Bfakc, and spring rctainef washedaccordingly.
lscc
fisure
ll (al
at lefo
6. ADJUSTMENT
OFSUPPLYREEL SIIAFT
ASSDMBLY
A felt clutch matoial isuscd betweenthe love. side
of
thc reel table base plate and the .ewind rubbcr ring to
protect reco.ding tape from an excesive tension\th;le re-
winding operation. To check
thc amount offriction of this
pa.t, place onto thc supply reel table a 5-inch rcel with
rcco.ding tape wound by 60m/m in diameter and gently
pulL thc cnd of tape upward by a spring scale. Adjust
thc conical sp.ing so that thc amount of tens;on ;s kept
bctwecn400and500grams. Anothc. fclt clutch isattached
to thc re\v;nd drive wheel to provide proper sl;pping
ope.atioD cluring reco.d or play mod.. The procedure
for checkn)gfriction of this part issameas
the foregoing,
and betwe€n 80 and 120 s.ams of friction will give the
best result. Whcn the unit js set ;n fasi forward modc,
the amount of f.;ction will greatly be reduced and will
becomel0 to 20
grans.
Checkto sce
whether this is proper, if not, rcadjust coil
spring and spring r€tainer washc..{See
figure II (b) at left)
7. ADJUSTMENT OF TAPE HEAD
A vertical azimuth alignment of tape head is the only
adjustment that can be made at the field of service. To
align tape head,play 8,000cyclesrecordcd on an AmP€x
standard alignment tape. Rotate th€ azimuth al;gnment
sc.ew until a maximum playback level through the small
hole which is positioned on the shield cover of the tape
headassembly.
-9-
..t, ;
Fig. ll
R(/.Ly Hli
Fig. 12
:ir".
=..".".,..

tll ADJUSTMENT
OF
AMPLIFIER
r. ADJUSTMENTOFRECORDINGBIASFREQUENCY
Rccording/crasing bias frcquctrcy was setat 90KC plusor m;nus 5KC before sh;pment. It isdecidedby inductance
otthc oscillato. coit lpart * l7-L,) and its resonant capac;tor (part f C-17). To mcasu.e recordiDg bias frcquency, insert
a l0 or 100 ohm resisto.;n scrics
to the .cco.d/play head and coDnectvertical ;dput te.minals of an oscillos.ope
asshowq
in the Fig. 13. ADothcr testirg instrument to be preparedisan audio frcquency oscillator and jtsoutput shouid be conDe-
cted to hor;zontal input terminals.,f the oscilloscope.Vary frequcncy gene.atedby tbe audio frequency oscillator around
90KC, and setthe oscillator at the point whe.r adesirous6gurc appearson the oscilloscopc.
'fhc recordins biasfrequcncy
no$' corrcspondsto the reading of the oscillator. Check oscillator coil, C-17
and biasheadif the recordingbiasfrcqucncy
mcasu.ed; not w;thin 90KC + 5KC.
2, ADJUSTMENT OF RDCORDINGBIAS VOLTAGE
A p.oper rccordnrg bias vottagc is 45 volts + 3 volts A.C.
and is adjusted by Cl6. To measure .eco.ding bias voltage,
coDD€ct
a V.T.V.M. (Vacuum Tube Volt Mete.) to the record
/play headasshowD
;r the lig. 14.
Check Cl6 (included AKl3) and record/play head if the
recording bias voltage mcasu.ed doesnot meet to th€ abovc-
mentioned specificatioD.
L1{0,s.c)
Fig.13
li' -I j(PllLEFT]
Hi|mn-!,(c,lEIcHr)
I#ltlri!i
F;g.14
3. ADJUSTMENTOF
ERASINGBIAS
VOLTACE
A prope. €rasingbiasvoltagc is65volts + 5volts A.C. and isadjustedby Cl4. To neasure erasingbiasvoltage,connect
a V.'[.V.M. to the erase
headasrhown in the Fig. 15.
Chcck Cl4 and crascheadil thc oasing biasvoltagemeasured
does
not meetto the above,mentionedspe€ification.
Fig. 15
4. ADJUSTMENT OF
RECORDINGLEVEL
A basic rccording lcvcl, .cfefcd to as
"oVU", s€t at th€ point where
current of 30lA + l0 % flows to the recording head at 1,000cycl€s.
The VU neter indicates oVU ! 2VU wheDa signalof -55 db + 5db
at the microphone jack or -40db + 5db at the line input jack when
thc volumc control setat its maximum.
Adjustment ot recording level can be accomplishcd by varying sensi-
tivity of VU metft, however, it is not necesa.y to make in a field of
serviceasall VU mete6 haveco..ectly beencalibrated at factory befor€
shipment.(See
lig. l6 for details.)
NOTEi Make sure to stop oscillation by disconnecting the oscillator
coil | 17-L,at the points marked "P" and "G" prior to measure,
ment of reco.ding lcvct.
i f^-
o;.---r:@*=;;'6d.".0,.-""
#;;;-v'1c' lRrcHr)
I;':I:::j-:- v ' 1i,l l1
LEFT)
v,(P)(RrcHT)
o-, ^ -,nrl ll,,n
r r"
Fig. t6

.UN
MAINTENANCEPROCEDURES
1. LUBRICATIONINSTRUCTION
For maximum senice life and optimum performance, lubricate the parts id€ntified below after each 500 hours of
ope.ation. Useonly light machine oil of goodquality
Motor 3drops
Drive Capstan Shaft 2drops
Rewind Idler Wheel Bearingand wind take-up Idler Bearing. I drop
Intermediate Idler Bearing I clrop
Pinch Wheel Bearing 2drops
Take-up and Supply Reel Shaft Bearing& 2drops
Also apply a liberal frlm oflight machinegreaseto eachroller surfaceof all leversand cams.
CAUTION: DO NOT OVER-LUBRICATE. WIPE OFF EXCESSOIL BY A COTTON SWAB
SOAKED IN ALCOHOL. O'THERWISE,THE OVER.FLOWED LUBRICANT MAY
BE SCATTERI,D DURING OPERATION, THE RUBBER COMPONENT PARTS
WILL BE DETERIORATED.
FLYWHEEL MOTOR
Fig.
17
2. CLEANING TAPE HEADS AND OTHER PARTS
Wipe surfaceof tap€ h€ads,
guide roller bearing,capstan
bushing and pinch wheel periodically with a soft cloth soaked
in alcohol or carbon-tet.
' tt.6
r.-'-''' r
It

il IIST OFREPTACEMENTPARTS
TOPPAl{Et
r7r-0ot
002
003
00.1a CapstanHolder
005a 'rablc A, 'Iapc Guide
005c Table. Washel
005e Bcaring(635JZZ)
0059 Table, Washer
00si Table D, Tape Guid€
005j lrop, Tape Guide
DECKFNA
I
172001 Deck Fradc
002 H.ad A*embly, Conplctc
m2a E.aseHead
m2b Record/PlaybackHead
002c ScfewFlat Mould 4r8
002d Prop A, Head
002e Prop C, Hcad
002f S..c\Yl.-latMould 4xg
002g S..ew Fhr ,1x
I
003 Index Counier,Complete
0I)3a Pulley,
Counte.
003b Belt, Counrcr
003c SGes, Wnhour H€ad 1x7.5
00+ Supply Reel ^$embly
00{2 Sc.cv l_lnt3xb
001b Plate,
Reel Tabl.
00rc Reel Shaft A, Supply Reel
004e Rewind Pulley
m4f Sp.ins G, Left
m{h WasherPin, La.se
0O4j r-ak€-upRouer,C
004k Holdef, Reel Snaf.
(Sta. Typ. Sprins)
0040 Waiher Pin. large
@4q Metal Fiting,\, Reel Table
0O{r golde., ReelShalt
lslar Type Spring)
172-0O{t Washe.}in
001u Pulley,ReelShalr
001v Screw,without He"d
005 ]?Le-up R€el A$embly
0o5, Reel Shaft A, Tat€-up Reel
00,b Felt Washcr
m5c T,ke-up Rouer,A
005d Spfing G, Risht
005f Takr-up Rolle., B
005e Holder, Reel Shaf.
(Sta. Typr spring)
005h Metal Fitlins B. RceL
_rnbL
oo-i sPrirs, F3
O05l Washer
Pin
005n Nylon Spring
006a AS Levcr, Conplete
006b Plate,AS Levcr, viih AS
Lever ProP
006c ScrewBind 3x5
006d Wash€r Pin
dl6€ 3 mn eround Lug
007a InstanrStop Lever,]\
007b Spring.In$ant Stop Lever
{]07c Stopper,ln*ant Stop Lever
007d ScrewBind 3x5
007e Hold€r B, Innant Stop Levc.
007f ScrewFlar Mould 4xB
O08a RecordingSafety Bu(on
008b Cah Sroppe.
008. Fibe., C,n Sroppe.
000d r.sulator Plate,Can Stopptr
008e screw Fhr Mould 4x8
009a Pinch Wheel
009b Metal Cap, tinch Wheel
009d Lev€r,Pinch Whccl
009e Shaft C, Pinch Wh.€l
009f 4mm Nut
0099 Shaft A, Cam Roller
009h C2m Roller B
mgi shafr. Pinchwheel Lcvcr
0l0a Lever,Takeup Brake
0l0b Take-up B.ake Roler
0l0c Screw,B.ake Roller
0l0d 3nm Nur
0l0e sbafr, Takc-up Bralc Lcvcr
010f Washef
Pin
olla Levcr, Supply B.ake
olrb Supply BrakeRoller
ollc Screw,
BrakeRoller
olld 3mm Nur
0l1e shafr, supply B.aLeL."..
ollf WasherPin
0l2a Swnch,Autonatic Shur-of
(6Pslide sritch)
ParB No. Nomenclalufe
172-012b Plare.AutomaricShutof
0l2c Scr€wSen,i-Cubi.3x5
013, Mirtu SwirchM-8-3
0l3b Holdef, Switch
0l3c ScrelvSemi-Cubic3x5
0l3d Sc.ewIIat Mould3xl5
0l4a SNirh. SpeedChange
pP slide swnch Nc)
0l4b Plate,SpeedChangeSwitch
0l4c S.rew Flar Mould .1x 10
0l4d Co.d Supp.rt
olsa Idler Whe.l
0l5c Walher Pin
0l6a Internal Wheel
0l6c WasherPin
0l7b Shaft,Lcv.r A
0l8b Cam Rolle., A
018. Cam Roll€r,B
0l8d Washer Pin
0l9b Washe. Pin
021 Lcvc., D,2
022b Can Rollcr, A
023b Holdc., L.ve. G Meral
023c Sropper, Levcr G
023d Lever G Metal
02lb Idler Shaft,B
026a Lev€r F, lor Motor
027
Hun BuchinsCoil, f6r Left
028
029
12

172,030b Hunr B!.kins Coil. fo. Righr
030c Holder, Hh BuckingCoil
030d Screw
Scmi-Cubic3x22
032a Lever, Belt Change
032b Metal Fitting. Belt change
032c Sp.ing,Belr Ch.nge Lever
033a Table. Lifter Pin
033c Sporh,fo. Lilte.
033d Can A, Hcad Lilter
033e C,n B, Head Liftef
034b Sp.ing,UN-D
034c Spring.D
034d Spring.D
034e Spring,Idle.
034f NervSpring D
0349 To.sion Spfins
034h Sp.ins, B
031i Spring,Beh Change
034j Sp.nrgB, Belt Change
173-001 Motor,Conrplere
00la s..e\v Fla! Mauld 3x 15
00lb SteppedPuuey
00lc Belt Holder
00ld Motor Pulley
00le Oil R€tain€r
oolf Motor Hold€r
00lh Moror Fan, D
00li MP Condcnser2ul (260vACl
mlj dolde., Moto. Condense.
mlk Prop,Motof 8x22.5
00ll Prop, Motor 0x 21,5
00lo S.rcw l.-latMould 4x50
00lp S..cv, virhout Head 4xs
00lq Sc.cwBind3xs
00lr Hexasonal
Nut
17.1-001 Flywhe.l,Cobplcte
00lb Main Mctal C,se
00ld 4n,m Ball Beains
00le Pl2teC, l.-lyrvheel
00lh Wing Nut
00li Sc.eN,llywhkl adju$
00lj Prop B, Flyvhc.l
001k lrop C, Flyrvheel
00ll Drivc Belt
175-0ol Svn{:h Block
00la Knob, Record/Playba.k&
Rewind lat Fo.wa.d
Patu No. Nonenclaturr
00le 8mm BallBearing
001| S$itch Table, A
00lb Fai/Fonvard Rewind Shaft
00li Rcr'Playba.L Resind Shaf.
00lj Pin
00lk Plate.Cam
00ll Sp.ing,K
00ln SRitchTtble, B
00lo Record/llayb2.k Conv€.sion
00lp Spo.k Cam
mls ScrewBind3x5
cAst
176-001 C26inrt,Complcte
002a Table, Rubber loot
002b Rubber Foot
002c ScrewSemicubic 3x l8
003a Ventilator (Panel Escucheon)
003b S..cN T.us 6t 12
0Or2 ventilaror, A
00,1b S-ew Tru$ 6v 12
005a Ventilator,B
005b Screw
Tru$ {ix 12
007
006
00Aa Chasn A. Spealie.
008b Chash B, Speale.
009a Speaker
5x 7'i
009b Sct\r Flat Mould 4x12
A2
l7-AKl3 C.R. CompoundBodt
AKl4 C,R. Compoud Body
AitPUFttR
Ampli6er Knob, .\ (Tone)
Ampliner Knob, B (Volume)
nsl€.
changingVoltage
Sc.ew,rvithourHead 4x6.s
S..€iv,ivithout Head 4x ll.5
Scrcw,
Semi-Cubi.4xo
17-C2
c3
o4
c5
c6
c7
ca
c9
ct0
cll
ct2
cl4
cl6
cl8
C20ab
c2l
c22
c23
c24
Mica Condense.10U 500Wv
Ceranic Condenser0-02P
CeEnic Condcnscr0.02P
Oil PaperCondenser0.05
M
Cerani. Condenser0.02P
Ceramic
Condens€r0.01P
CeramicCo.densef0.02
P
Ce.anic Cond.nse.0.02P
Ce.ani. Condenser0.002P
CeramicCondenser0.02
P
Tubular Type Elecr.olyric
Condense.
s0Af 25WV
Mica Cond.nstr lou 5m WV
Mica Cond€nserlsu s00WV
Mica Condensef500J500WV
Lug Te.minalType Eleclrolytic
condens.r 40+40 llf 350wv
Tubular Type El.ctrolytic
Condenser
,l0
rl 350wV
Tubula Type Iilectrolyti.
Condenser20/r 300Wv
Tubular Type Eleclfolytic
CondenserI0rrf 15WV
Tlbula. Ttpe Electrolytic
Condensef
l0rf I0
WV
l?-Rl liied Resisror
l/.lP 500KO
R2 lixed R€sistor
I/lP 3LQ
R3 FixedRelkrdr
l//4P ,.2M{}
R4 liaed Resistofl/21'250KO
R5 Fixed Resntorl/'2P l00KO
R6 Fixed Rosisrorl,/4P 2KQ
R7 Fixed
ResGtorl,/2P 250KQ
RB [ixed Reshtor l/4P 500KO
R9 lixed Resntor l,'4P 20KO
Rlo Filed R€sinor l/4 P I MQ
Rll FlexibleReshtorI W 8(}
Rl2 Fixed Resistorl,/,IP 2000
Rl3 liaed Reshtofl,/4P loKQ
Rl4 lrixed Resntor l,/4P 500K0
Rl5 Fixed Resnio. l/'.}P 500KO
Rl6 Fixed Resisto.l/4 P I KO
Rl8 Wned Rcsisto.10WL .t70Q
Rlg Wired Resisto.loWL 4700
Rro lixed ResistorlL loKO
R2l wned R€sisror 3WL 180Q
R22 Flexible
wi.ed Resistor3W 8f)
R23 Fixed Resisto.l/4P loKQ
R24 Fired Reshto. I/.1P 5000
l7-vRl-2 Variable Reshtor I M(Al
soK(A)Double VR
VR3 Wi.cd Vari"ble Resntor l/2W
100{I
VR4 Wired variable Resisiofl/2w
1000
l3

Paf6^"o- \on,cn.lalu'c
l7-SDl Sill.onc
I)nxlcsM-150D
sD2 siliconeI)io(le SNl-150D
rTtt
t2
l7Jr
J2
J3-5
J4
J6
l7
17-ll
\'2
l7
r,r
1,2
l7,Ml
l7,tl-l lilot Lanp
lL2 l-amp So.kri, S$ad Type
l7 Swl Rota.y S\rirch(Ro.orll
rlayba.k Co.verion)
2 (lonne.tiv. Pin Jack
2 Conne.rive }n, Jack
2 Connecrn( Pin Ja.k
PaftsNo. No.ren.latu.L
l7-S\!2 6P Sl'(lcS\nch.rvth \lhiic
Knob li\fu rcr Conve^ion)
SW:l 6l' Sli.leS\rinh.
vith Wbitc
Krob ispealef ON OFr'l
Sw4 8P Sl e S\vir.h(l-'r{:k
S$5 l-osglc S\ir(n iPo\fcr
oN,
oFrrl
5\46 6P Slnlc Svirln. \vnh Black
Knob
1t0
60,y(lr Lhangt)
lT llll 52L2Lug Pl.t.
TB2 ,12L1
Lug }lare
TB3 4lL2 l,ug Platt
TB1 311-1
Lus Platc
TB3 2Ll Lus l'hrr
vr(uur, 'l\lbe 12'\T7
va.uun, Tube l2^T7
17\'sl Vacuum Trbc So.k.t, 9P
moutr lype
VS2 vr.uun Tube So.kcr.9P
nnrnld rYP.
P,.6 No, Nonren.Lrtufe
l7-\rs3 V..uun 'Iube Socket,9P
Drulrl typr
VS4 Vacuun Tubc So(kd. 9P
n,orkl (yPc
l7-Zl lran\formcr Angle,Left
,42 lransforner Angle.Rishi
z3 Namc Plate.Cycle Changc
2.1 So.krt, changeVoltage
25 He\rsonal l.o!, Selector
26 Nade Plrtc, Lhangc,\Cl
27 3nnn \ut, spo.irl
Z8 ClordSupport
Z9 Rubb.r Bush,
AC Coftl
7rr lhrc '\, Ja.k
Zl2 Phtc B,
Jack
Cla.ip Pin, nr. 6BQ5
Clanrp
Pi., fo. I2AI7
Zllr SL.dvScdriCubi.
lra
Zl lb ScrervSenriCubr
:l:6
zl4c S.r$v Flat Mould ,1: lt)
Zl4d S.rc\LS.nriCubi. 3r 6
T EXPLODED
VIEWOF
COMPONENT
PARTS
Front Ponel
I7t
-0
I7t 00t
171-0
r-006

Amp
lifier I
I76 009a
I76 008a
176
0l
17213
17\t2
17
213
I7-SW,
17-J.
17-J,
I76-008a
17
Z7
17Z,
t7
z
17T
176
010
17
A5
r7
Jl
]7.SW,
I76 0c8ll
I76
nl0
17Z.
17
Z.
1-7-214.
17Z1+a
i76-0t0
17-J
t7-2,,
I7-Sy/
176
008b
11'Z
I a
I7VS,
]7.VS,
Amplif
ier II
176010 176_009a
7SW 17J r
17- 17.) r7 S!!,
t7
-y26
t76010

:€ e
fF+
i=
1l
d
(I
=
cr
=
,\-a
; t r=
o,
1b,

176-O0l
Cqse I
r
76'006
Cose II
Case llt
176
007
176-002a

i\,rr-ooo^,.--4
1120A4b
172'OO5a
172-OO4d
172-005b!-
172-AA4i
72-0a4J
-172 OO4e
112
172-004f
1/2-AA5d
172-OA4h
172-OO5e
172-O05f
172-AO4c
172-O05i
172-OO5k
172-OA5l
172-OObn
172-OA5
172-OO4k
172-OO4l
172'OO4n
,{.fu