operator·s manual - radio museum
TRANSCRIPT
MODEL
X-355 OPERATOR·s
MANUAL
CROSS FIELD ' H,EAD ' SOLID STATE AMPLIFIER
4 -TRACK STEREOPHONie
SOUND RECORDER '
AND REPRODUCER
TABLE' OF CONTENTS
I GENERAL INFORMATIONS 1. SPECIFICATIONS ········· · ··· ·· ·· ··· · ·· ·· ····· ··· ...... ® 2. NOMENCLATURE ...... · ...... .. .... · · .. · .... ...... · .. .. @ 3. CROSS-FIELD HEAD ........ .. .... .. ........ ... ......... @)
4. 4-TRACK RECORDINGj PLAYBACK ...... .. .... ® 5. TROUBLE SHOOTING ................ · ................ @
6. VOL TAGE AND CYCLE CONVERSIOI\' .. .... (j)
.Il OPERATING INSTRUCTIONS 1. TAPE LOADING .... .. .. .. .............. .. ................ ® 2. PLA YBACK ............................ · · .. · .. · .. · · .. .... .. ® 3. PLA YBACK USING EXTERNAL
SPEAKERS OR AMPLIFIER .. .. .. @ 4. AUTOMATIC STOP (DECK ONLY) ..... ... ..... .. @
5. AUTOMATIC SHUT-OFF (DECK AND AMPLI FIERS)· .. ··· @
6. AUTOMATIC REVERSE (METER) ...... .. ....... @ 7. AUTOMATIC REPEAT (METER) .... ..... ..... .. .. @ 8. AUTOMATIC REVERSE OR REWJ:,\/0
(METALLIC SENSING TAPE) .... .. @ 9. i\UTOMATIC SHUT-OFF WITH
REVERSE AND REPEAr- ..... @ 10. MANUAL RE:VERSE OR REPEAT ............... @ Il. RECORDING ........ · ..... ........ · ...... · ............ ...... @ 12. RECORDI:,\/G FROM DISCS ..................... .. . @ 13. RECORDING FROM AN EXTERNAL
AMPLIFIER · .. .. @
14. RECORDING FROM ANOTHER TAPE RECORDER ...... @
15. MONITORING .......... .. .... ........................... @
16. REVERBERATION .... . ..... . ....... ......... ........ ... @ 17. SOUND ON SOUND ............... · ..... · .. ... ... ...... @ 18. SOUND WITH SOUND ............................... .. @ 19. FAST-FOR WARD AND RE'.v!ND ................. . @ 20. TAPE SPEED CHANGE ........................... .. .... Q 21. HEAD CLEANING .. .. ... .. .. ... · · . .... .. .. . .......... @J 22. HEAD DEMAGNETIZA TION .. · .. .. .. · .. .. .... · .... · • 23. TRANSISTOR PROTECTION -........ · ............. · @ 24. VENTILATION .. .. .. ·· .... · .. · .. .. .... ·· .. .. .... .. .. .. .. ··· @>
m ACCESSORIES 1. ACCESSORIES OPTIONAL .... .. ... · ...... · .......... @ 2. ACCESSORIES SPEAKERS ........................... @ 3. ACCESSORIES STANDARD .. .. ...... .. .. .. ....... @
lV LUBRICATION CHART ....... .. ...... .. ..... .. ........... ®
V CONNECTING DIAGRAM ................... ............. ®
VI SCHEMATIC 1. MECHANISM UNIT ..... .. .. .. ... .. .... .. .............. @ 2. AMPLIFIER UNIT .......... · .. · .. .... .. ·.... .... .... .. .. @
Tape Speed Frequency Response
Signal to Noise Ratio Wow and Flutter Playback only) Equalization Cross Talk Distortion (Total Harmonies) Head ······ ···· ··Cross-Field
Motor Used
Timing Accuracy Recording Sensitivity
Power Output
Transistor U sed
Fast-Forward and Rewind Ti me Internai Speakers Power Requirements W eight (Net) Dimensions
1. SPECIFICATIONS
3-3/ 4, 7-1 / 2 and 15 ips. 30 to 24,000 eps ± 3 db a t 7-1 / 2 ips. 30 to 18.000 eps ± 3 db at 3-3/ 4 ips. Better than 47 db at normal play. Less than 0.08% RMS at 7-1 / 2 ips. at normal, reverse play.
1 GENERAL INFORMATIONS
Better than 45 db at reverse play. Less than 0.14% RMS at 3-3/ 4 ips.
Correct equaliza tion for playback of tapes recorded to the NAB curve. Less than - 82 db (Monaural) Less than -45 db (Stereo) Within 4.0% at 1,000 eps 0 VU at 10 watts. * Recording Head : Inline 4 Track Stereo and Monaural,
low impedance 135 ohms at 1,000 eps. * Playback Head : Inline 4 track tereo and monaural,
low impedance 1,000 ohms a t 1,000 eps, installed on an automa tic shift deviee.
* Erase and Bias Head : l nline 4 track stereo, low impedance 750 ohms at 90 kc. Hystere is synchronous 2 speed (4.8 pole) motor for capstan drive. Two 4-pole induction motors for fas t.forward and rewind. ± 0.3% at ali tape speeds. Input of more than 0.5 mY in MICROPHO E j ack. Input of more than 50 mY in LI NE INPUT jack. 25 wa tts at Music Power on each channel, total 50 watts. 20 watt at Undistorted Power Output on each channel, total 40 wa tts. 2SB 443 (A) x 4} Pre-amplifier 2SB 75 (B)x l2 2SB 75 (A)x 2} 2SB370A(A)x 2 Main amplifier 2SB338 (A) x 4 Rectifier SPN.Ol x 2 Rectifier 12C.2 x 1 Silicone Diode x 3
2SB370A lB) x 2 Oscilla tor
45 seconds for either operation using a 1,200 feet recording tape at 50 cycles, 36 seconds a t 60 cycles. 6-1 / 2" round, wide range speakers, one on each channel. AC 100 to 240 volts, 50.60 eps, 60 VA (a t non signal) to 170 VA (a t maximum output : 28.5 kg (62.7 pounds) 440H x 407W x 3100 mm Overall , case closed. (17.3/ 8"H x 16"W x 12.1 / 8"0 )
GENERAL INFORMATIONS 2. NOMINCLATURE
CD Supply Reel Shaft ® Guard Circle @ Speed Change Switch (!) Track Selec tor Knob @ Tape Guide @ T ape Guide Roller (j) Upper Head Cover @ Lower Head Cover ® Remote Control Socket @) Power Button @ Stop Button @ Rewind Button @ Play Button ® Fast-Forward Button @ Record Safety Lock @ Record Safety Button @ Microphone J ack (Left) @ Microphone J ack (Right) @) VU Meter
@ Line Volume Control (Left ) @ Microphone Volume
Control (Left ) @ Recording lndicator Light @ Line Volume Control (Right) @ Microphone Volume
Control (Right) @ Record Output Button @ Stereo H eadphone J ack @ Playback Output Button
@ Volume Control (Left) @ Volume Control (Right) @ Function Switch @ Equali ze r Switch @ Tone Switch @ Spea ker Switch @ Repeat Button @ Reverse Button @ hut-Off But ton ® Pinch Wheel @ Capstan Shaft ®J Reverse Pin ( T ) @ Reverse Pin ( ] ) @ T ension Arm @ Index Counter @ Rese t Button @ T ape Holder @ T ake-up Reel Shaft @ Dia! OA' Button
@ T ape Count Meter @Set Dia!
9 Manual Reverse Button @ Speaker Reflectors ® Line Input J ack (Left) !@ Line Input J ack (Right) @ Line Output Jack (Left) !§ Line Output J ack (Right) @ External Speaker J ack (Left) @ External Speaker J ack (Right)
3. CROSS- FIELD HEAD GENERAL INFORMATIONS
Cross-field head crea tes a sensation in the tape recorder world by making a wide range of recording which has never been heard before
any tape recorder.
Usi.ng this cross-field head, Mode! X-355 provides a surprising recording performance (30-24,000 eps a t a tape speed of 7-l / 2 ips and
' 0-18,000 eps at 3-3/ 4 ips).
vVhat is superior abou t cross-field recording? How does it differ from typical recording methods as far as construction is concerned?
On these, explana tion is given below in sequences:
In the typical recording system, the signa l current and the bias current a re combined together and applied to the recording head.
(R efer to Diagram 1.)
It is weil known tha t the purpose of bias curren t is recording a t high sensitivity with a signa l applied on the ta pe, with no distortion
and minimizing noise generation.
However, the bias current providing such an advantage a lso has an undesirable charactor. That is, the wide magnetic field of the bias
current affects the recorded signa l, resulting in weakening or even erasing the signal. This phenomenon is particularly noticeable at
h igh f req uencies.
ln the cross-field system, the signa l current is applied to the recording head whi le the bias current is applied to the bias head.
These two heads are located in different positions, as dete rmind inter-rela tively, so that the magnetic field of the bias will not affect
the signal recorded on the tape, even when a sufficient bias is applied. This allows the recorded signa l to remain on the tape with
high fidelity.
Diagram 1. Ordinary recording system Diagram 2. Cross-field recording system
Signal
_@_~: biao
Direction in Which tape is t ransported .
__@_::~ ({\)) Crossfield
~ Bias
head
GENERAL INFORMATIONS 4 . 4-TRACK RECORDING/ PLAYBACK
1
2
3
4
The AKA I X-355 employs a four track system that can be used for either stereo or monaura l recording and playback.
Fig. 2
® 1 1
1 , -
Fi r st track The desired track or tracks a re selected by the
TRACK SELECTOR K NOB. @ ~ 1
Second track ( } Tape width 1
Third track \ .... Fourth track -
4-Track Stereo Recording/ Piayback Stereophonie recording/ playback req uires the simultaneous use of two tracks. Set the TRACK SELECTOR K NO B @ to "STEREO". The first stereophonie recording/ playback takes place on tracks 1 and 3, and the second on tracks 2 and 4 a fter the reels have been turned over.
4-Track Monaural Recording/ Piayback
1
2
3
4
The monaural recording/ playback track sequence shou ld be 1-4-3-2. (A). Set the TRACK SELECT OR KNOB @ to " 1-4" .
o/Y-$1· 4 3
~2
The fir st monaura l recording/ playback takes place on track 1, and the second on track 4 aft er the tape reels have been turned over. (B). Turn the tape reels over. (C). Set the TRACK SELECTOR K NO B @ to "3-2".
The third monaural recording/ playback takes place on track 3, and the fourth on track 2 after the tape reels have been turned over.
The X -355 d O{S not reccrd in the reve1se d irection. Using reverse playback, it is r ot r.e<essary ta turn the ta ]::e reels over. When the X -355 begins reverse playback, the pla yback head is automatically shifted to the remaining tracks.
© 4
3
2
® ----------------- @ 1 m~'77777777777777T.17777?77777~77777=. 4 -
2 3
~-\~%--- 2
S. TROUBLE SHOOTING GENERAL INFORMATIONS
IMPORTA! T: READ THE OPERATING IN TRUCTIONS CAREFULLY BEFORE OPERATING YOUR RECORDER.
The sym ptoms li sted below do not necessaril y indicate a malfunction of your tape recorde r. If you r machine exhibits any of these sym ptom, ta kc the indicated ac tion.
Los of sensitivit y or tone qua lit y may be due to: Dusty or dirty heads - clea n the heacl s. Reversed ta p -pl ace the dull sid e of th e ta pe toward the heads. lmproper vo lt age- check volt age input a nd adjustment.
B. lrregularit y of the ta pe tra nsport may be clue 10:
Grime adhering to the heads- cl ea n the hc.:ads . Oil on the ca pst an - clean the ca psta n. Dirty tape surface - use a clean ta pe. Be nt take up ree l - stra ighten the ta kc up ree l.
C . If your machine will not record , insu re th a t the followin g a re in the correct position : RECORD SAFETY BUTTON @ Microphone plugs
O. If your machine wi ll not reproduce, insu re th a t the following a re in the correc t position : PLAYBACK OUTPUT BUTTO N @ SPEAKER SW ITCH @
Lubrica te the X-355 a ft er every 1,000 hours of use.
If any problem a ri ses, ta ke your machine to the a utho ri zed AKA I agent in your a rea or to the Service Department of the AKAl Company in Tokyo, J apan.
GENERAL INFORMATIONS 6. VOLTAGE AND CYCLE CONVERSION
1. Voltage The VOL TAGE S ELECTOR swit che a re loca tecl un th e back of the record er right above the fu se holc.ler . T o sele t an opera ting volt age, remove the voltage selec tor cover pla te and set the pro per volt age on the two switches o th a t th e des ircd volt age shows through th e over pl a te win dow Th t> rota r y swiu:h must be pulled out, rot a ted , and reset a t the d esired position. IF THE RECORDER IS OPERATED ON THE INCORRECT VOLTAGE, SER IO US DAMAGE MAY RE U L T.
C'.\l'TlON :
Fig. 3
2. Cycle
'ha nge fu,e FL' "d ~ :
;,uurd 1ng tu \ 'Uit~gr;.
1 (~l \' 111 1 :!0 V 3. \ 2()0 \ . [<) :! 1(1 \ ' 1. j . \
Fig. 4
The X-355 can be opera ted on either 50 or 60 cycl e a lternating current. The rea r cover panel (Figure 5) of the recorder must be removed to ma ke a cycle conversion . For 50 cycle opera tion, loose n the knurled screw on the belt guid e a nd oosition the belt so it rid es on the lower driving tracks of the flywh eel a nd motor bushing (Figure 6). For 60 cycle operation, loosen the knurled screw a nd position the belt so it rid es on the upper driving tracks of the Ayv.rheel a nd motor bushing (Figure 7). After th e belt is properl y positioned for either opera tion, tight cn th t knur led screw and rese t the two si ide switches located near the Aywheel and the vol tage selector cove r panel.
VOL TAGE AND CYCLE CONVERSION GENERAL INFORMATIONS
Fig. 5
50 Cycle 60 Cycle Fig. 6 Fig. 7
@ -----------
OPERATING INSTRUCTIONS
Pl ace the reel with tape on the SU PPL Y REEL SI-lAFT CD a nd an empty reel on the TAKE-UP REEL SHAFT @ . Pull clown on the LOWER HEAD COVER @ a nd thread the ta pe as shown by the dotted line in Figure 8. After th e ta pe has bee n threaded, push the LOWER HEAD COVE R @ back up into positi on. When the recorder i s used in the ve rti ca l position , the Rubber R eel 1-Iolders must be used . Best re ording results a re obta ined with new tape.
Stereo Connec! the power corel a nd Joad a ta pe. (A} Push the POWER BUTTO, @). (B) Set the TRACK ELECTOR KNOB @ to " STEREO". (C) Set the SPEED C HANGE SWITCH ® to 7 Yz or 3-3 / 4 as re
ques ted. (D) Set the FUNCT IO ! SW ITCH @ to " STEREO'·. (E) Set the EQUALIZER WITC H @ to 7~2 or 3-3/ 4.
The EQUALIZER SW ITCH @ a nd the SPEED CI-lANGE SW ITCH ® must ha ve the same se tting.
(F) Push the PLAYBACK O UTPUT BUTT0:'-1 2
(G) Set th e SPEAKER SWITCH @ to "ON". Open the SPEAKER REFLECTORS -o to fun y-five degrees.
(H) Push the PLAY BUTTON @ . (1) Ad just the VOLUME CO:'-JTROL KNOBS @ , @ to cl es irecl vol-
unle . IJ) Set the TONE SW ITCH @ to "FLAT' or ·'BASS" as cl es irecl.
Monaural For monaura l playback, substitute the followin g steps for steps (B) a nd (0 ) of the stereo procedure, a nd follow the res t of the stereo procedure. (B) Set the TRACK SELECTOR KNOB @ to " 1-4" or "3-2" as re-
quirecl. (D) Set the FUNCTION SWITCH @ to " MOt 0 " .
Onl y the left channel amplifi er is u ed for monaural playback.
1. TAPE LOADING
2. PLAYBACK Fig 8
Fig. 9
®
3. PLAYBACK USING EXTERNAL SPEAKERS OR AMPLIFIER OPERATING INSTRUCTIONS
Though your AKAI X-355 has two intern ai speakers, a pa ir of eithe r 8.Q or 16.Q high fid elit y ext erna l speakers will enable you to enj oy the best sound reproduction .
A. lnsert the plugs from the externa l speakers into the LEFT a nd RIGHT EXTERNAL SPEAKER JACKS @, @. When the speaker plugs are in the speaker j acks, the respec tive interna i speakers a re inopera tive.
B. Set the SPEAKER SWITCH @ to "0 1". For stereo playback, the external speakers should be epa ra ted by
Fig. 10 at !east seven fee t (Figure 10)
Fig. Il
Fig. 12
If an extern al stereo amplifier is used for p layback, connect the LEFT and RIGHT UNE OUTPUT J ACKS @), @ to the Left a nd Right Aux J acks of the Amplifie r (Figure Il ).
4. AUTOMATIC STOP (DECK ONL Y) The TENSION ARM @ is connectee! to a m icro-switch tha t automaticall y stops the deck il the ta pe should break, pile up, or pass er.tirely through to the take up reel. Under normal operating conditions, the a rm will be held in the approximate position indicated in F1gure 12@. If the a rm reaches the position as shown in Figure 12<!)), the micro-switch will fun ction and stop the deck.
OPERATING INSTRUCTIONS S. AUTOMATIC SHUT-OFF (DECK AND AMPLIFIE RS)
When the SHUT.OFF BUTTON @ is pushed in (Figure 12@), the deck and the ampli fie rs a re connected to the TENSIO:-i ARM @ microswitch. If the tape shou ld break, p ile up. or pass entirely through to the take up reel, the TENSION ARM @ will reach the position shawn in Figure 12® a nd the deck and a mplifiers will be turned off automatica ll y.
L..P.;.O;IL. •• .. v-" .. '-";_TooF ... w;_;o;_ __ ..,:R~fP~I~Aic__._~REVR!, SHUI Otr
6. AUTOMATIC REVERSE (MEYER) i\utomatic ··everse is used for playback on ly. When the meter is used for au tomati c reverse the X-355 will give continuous playback in bath d irec tions between a ny two poin ts (A a nd B) selec ted on the tape.
(A) Push in on the DIAL OFF BUTTON @ and rota te it clockwi se until the black index ma rk points stra ight up.
(B) A lign the '·0" on the TAPE COUNT METE R @and the red index mark on the SET DIAL @ with the bl ack index mark on the DIAL OFF BUTTON @ (Figure 13@) This step estab lishes point A on the ta pe.
(C) Advance the tape, by either the PLA Y BUTTON @ or the FAST. FOR WARD BUTTON @. As the tape feeds forward , the TAPE COUNT METER @ maves cou nter clockwise as shawn in Figure 13® . Push the STOP BUTTON @ when the tape has adva nced to the desired poin t ll .
(0 ) R ota te the SET DIAL @ until its red index mark is a lign ed with the "0" on the TAPE COU NT METER @ as shawn in Figure 13@.
(E) Push the R EVE RSE BUTTON @ (Figure 13@) (F) Using the REWIND BUTTON @, rewind the tape back to the
sta rting point A. As the tape rewinds or pl ayback in reve rse, t he TA PE COUNT METER @ maves clockwise. The sta rting point A is reached when the "0" on the TAPE COUNT METER @ is a ligned with the black index mark on the DIAL OFF BUTTO N @.
(G ) Push the PLA Y BUTTON @. The X-355 will now pl ayback from point A to point B, and upon reaching point B will reverse itself a nd pl ayback to point A where it will reve rse itse lf aga in fo r pl ayback to point B. Thi s opera tion will continue automatically, as shawn in Figure 13@, until the STOP BUTTON @ is pushed When the PLA Y BUTTON @ is pushed again , playback will resume in t he fo rwa rd direc ti on until reve rsai occurs a t poi.1 t B.
®
13
NOTE: When you desire the reverse playbac k operation by usi ng the T in-foi! ensing Tape, be su re to check a nd see
ihe Set Dia! (A) and T ape Counrer Meter (B) is no t se t with1n the ranges as shown below Figures 1 a nd 2
respec tive! y.
If the et Dia! ( ) and T ape Counrer Meter rB) i se t wi th in thal range nei ther case the reverse playbac k opera tion
will work.
(J) T he red Index Pointer on the Set Di a ! (A ) is se t with in the range of " 1-0- 11 " on the T ape Counter M eter
lB) as hown by the do ttcd line in Figure 1.
12} T he "0'' on the Tape Counr er Meter rB) lies ' ithin the range as shown by the dotted line in Figure 2.
DIAL~~ OFF~
c ( Fig. 1)
1 1
1 1
A
B
( Fig. 2)
\ \
\ \
\ __ ,.:).
AUTOMATIC REVERSE (METER) OPERATING INSTRUCTIONS
NOTE:
ln stcp (C ), if the PLi\ Y BUTTO @ is used to ad va nce the rape, it i not necessary to push th e TOP BUTTON @ at poin t B. p. proarhing the desired point B. pe r~ rm oteps (0 a nd (E). ln step (C), rotate, the SET DIAL 4 count er clockwise un til its red ind ex mark
has sligh tl y pa ·sed the "0" on the TAPE COU NT ME TER @ . The X .3S5 will begin reverse play as soon as the "0" a lign irself with the
red index mark. Step 1F 1 and (C l a re not necessa ry , however, the informa ti on conra ined there uncle r is a ppli cabl e.
1\n alt ern at.: procedurt: for a utoma tic reverse is tolet the graduated Ti\PE COU:--!T METER , represent 2.400 fee t of ta pe. Approximately
2,375 fec t is the maximum length of tape tha r ca n be reversed using che TAPE COUNT METER @ Note, as in Figure 13@ and steps (BJ
and (D). tha t if there wc::rc:: 2.·WO fee t between points A and B, the TAPE CO NT METER @ and the SET DIAL .1 would be un a ble
to distinguish point A fmm point B. The inte rva ls between numbers represent 200 fee t. . ubstitut ,; the foll owing for stt:p · (C l an tl (f ).
( ) Manua ll y rotate th e TAPE COU T METER 1 coun ter clockwise unti lthe number tha r represent s the cles ired ta pe foot age between points A and Bis a ligned with the bl ack index ma rk on the D lAL OFF BUTTO 6 (Figure l3<Ii) shows 650 fee t).
(F) Manuall y rotat e th e Tr\PE COUNT METER 1 cio kwise until the " 0" is a ligned with the b lac k index ma rk on the 1 !AL OFF BUTTO ":6'.
7. AUTOMATIC REPEAT (METER) Automntic repeal is used for playback in th e fon·vard di rection only. When the meter is lJSed for automanc repeat. the X-355 will continuously repeat the portion of lape from point A to point B by playing back in the foward direction from point A to poin t B, rewind ing itsdf to
po~n! A and playing back again to point B. The opera tion will continue a uroma tically unti l the STOP BUTTON @ is pushed. When the
PLA Y BU"rTON 3 i pushed aga in, playback will resume in the forwa rd direct ion unt il rewinding occu t·s a t point B.
The proced ure for a utoma tic repea t is the sn me as for a utoma ti c n' verse except for· step (E). Substillle the following for step lE ).
Œ). Push the H.EPEi\T BUTT 1 ~:/ Figure 13 ;.
OPERATING INSTRUCTIONS 8. AUTOMATIC REVERSE OR REWIND {METALLIC SENSING TAPE)
Automa tic reverse or rewind with metallic sensing tape is used for pl ayback only. The sensing ta pe method is convenient if the tape in use is too long to be measured by the TAPE COUNT METER @ . (A) Push in on the DIAL OFF BUTTON @ a nd rota te it counter clock
wise un til it pops out.
(B) Push the REVERSE BUTTON @ or REPEAT BUTTON @ if rewind is desired. This step de-ac tivetes the TAPE COUNT METER @ .
(C ) Splice a two inch piece ot meta llic sensing tape to the end or a t the des ired reverse or rewind point of the tape in use. R evesal or rewind will occur when the meta ll ic sensing ta pe makes sim4ltaneous contact with the REVERSE PINS ( I ) a nd ( )[ ) @ , @. R everse (playback) or rewind will continue unti l the end of the ta pe passes the TENS ION ARM @and the deck is shut off.
Fig . 14
9. AUTOMATIC SHUT-OFF WITH REVERSE AND REPEAT (A) If the REVERSE BUTTO @ and the SHUT- OFF BUTTON @ a re both pushed in, the X-355 will reverse a t the point determincd
by the TAPE COUNT METER @ or the meta ll ic sensing ta pe and playback in reve rse un til the end of the ta pe passes the TENSION ARM @and the deck a nd amplifie rs are shut off.
(B) If the REPEAT BUTTON @ and the SHUT-OFF BUTTON @ a re both pushed in , the X -355 will rewind a t the point de term ined by the TAPE COU NT METER @ or sensing ta pe un ti l the end of the tape passes the TENSION ARM @ and the deck a nd ampli fi ers a re shut off.
(C) lf the REPEAT BUTTO @and the REVERSE BUTTON @ a re both pushed in the repea t fun c tion supersedes the reve rse fun c tion.
(D) If the REPEAT BUTTON @, the REVERSE BUTTON @ and the SHUT-OFF BUTTON @ are ali pushed in, step (B) applies.
10. MANUAL REVERSE OR REPEAT OPERATING INSTRUCTIONS
fig. 15
® Pushing the MA UAL REVERSE BUTTON @ in the center of the SET D IAL@ (Figure 15@ ) will put the X-355 into the reverse (playback) o r repea t (rewind) fun ction a nytime before the "0" on the TAPE CO U NT METER 7 is a ligned with the red index ma rk on the ET DIAL @. M a nual reverse ca n a lso be accompl ished by pushing the REVER SE BUTTON on the remote control a ttachment (Figure 15@). In orde r for the MA UAL REVERSE BUTTON @ to fun ction, the
® black index ma rk on the DIAL OFF BUTTON @ must be pointing stra ight up (Figure 15@) a nd the REVERSE BUTTO @ or REPEAT BUTTON @ must be pushed in .
11. RECORDING TEREO- Connec t the power cord a nd load a ta pe as shown on Page 9.
(A) Push the POWER BUTTON @). (B) Set the TRACK SELECTOR KNOB @ to "STEREO".
(C) Set the SPEED CHANGE SWITCH @ to 7-1 / 2 or 3-3/ 4 as required .
(D) Set the FUNCTION SWITCH @ to "STEREO" . (E) Set the EQUALIZER SWITCH @ to 7-1 / 2 or 3-3/ 4.
The EQUALIZER SWITCH ® and the SPEED CHANGE SWITCH ® must have the sa me se tting.
(F) Push the RES ET BUTTON @and se t the INDEX COUNTER @ to "0000". The INDEX COUNTER 2 provicles a reference for loca ting a position on the ta pe.
(G) Insert the microphone plug into the MICROPHO E INPUT JACKS @,@. M ain ta in a distance of a t !eas t seven fee t between the microphones (see Figure 16@). Microphone volume leve! may be adjusted a nd balanced by the MICROPHONE VOLUME CONTROL K NOBS @, @. Normal recording should not exceed "0" on the VU meters @. If a n externa l amplifier is connected a nd in u e, feecl back can be prevented by adjusting the VOLUME CONTROL KNOBS @, @.
OPERATING INSTRUCTIONS
(H ) Push either the RECORD OUTPUT BUTTO @ o r the PLAY- @) BAC K O U TPUT 13UTTON 2 •
If the RECORD O UTP T BUTT01 @ is used a nd the S PEAKER W IT C H @ is " ON", the progra m source may be moniwred as ir is bei ng reco rdecl . 1 f the PLA YBACK 0 TPUT 13 UTTO! @ is used a nd the
PEAK ER WITCI-I @ is " ON" , the recorded sig na l will be monito rcd as the ta pe passes the pl ayback head. The volu me may be co ntrollecl by the VOL ME CONTROL K NOBS @ , @ . @
(1) Push the PLA Y BU rTON @ . ! ] ) Push the R ECORD SA FETY BUTTO N @.
The RECORD SA FETY BUTTO @ is equi ppecl wi th the RECORD SA FETY LOC K @ to prevent inadve n en t erasure of reco rded ta pes. Turn the R ECO RD AFETY LOC K @ clockwisc un til its red m a rk is a lignecl with the whi te ma rk o n the recorder.
(K) Check tha r the R ECORD ING IN D ICATOR LI GHT 2 is on . If the ligh t i not o n, the X-355 will nor record.
(L) Push the STOP BUTTON @ ro stop recording. T o resume record ing, the PLA Y BUTT0:'-1 @ a nd the REC ORD Si\ FETY BUTTON @1 m ust be d epressed aga in .
MONAUR AL- For mona ura l record ing, substitute the fo llowing ste ps for steps (B) a nd (G ) and add step (M ). Follow the res t of the ste reo procedu re . (B) Set the TRAC K SELECTO R K NOB @ to " 1-4" or "3-2" as requir
ed. (G ) lnse rt the mic ropho ne plug inw the L EFT M IC ROPHO E
1 PUT J AC K @. Onl y the left ampli lî e r is used fo r mon a ura l reco rding.
(M ) Tu rn the ta pe ree ls over to record on rrack 4 or t rack 2 as applicab le. If the sound sources a re so fa r from the micropho nes tha t the M IC ROPHO NE VOLUME C ONTROLS @,@ must be turn ed up hig h, some hum m ay be introdu cecl . T o avoid recording the hum , a u ac h a ground wi re to the deck .
©
CD
RECORDING
12. RECORDING FROM DISCS OPERATING INSTRUCTIONS
T o record from a stereo o r mona ura l dise, a CRYSTAL PICK-UP (0.5-1 volt) or a CERAM IC PICK-UP ma y be connected direc tl y to the UNE INPUT JA C KS @ , ® in ste p (G) o f the record ing procedure. If a MAGNET IC CARTRIDGE is used , it must be connected to a sepa ra te pre-a mplilî er o r exte rn a l a mpli lîe r before being connected to the X-355 LI E INPUT J ACKS @, 1@. VU leve! is controlled with the U N E VOLU ME C O NTROL. @, @.
13. RECORDING FROM AN EXTERNAL AMPLIFIER If an extern a l a mpl ilîe r or tune r-a mpli lîe r combin a tion is used, connec t the TAPE OUTPUT leads of the exte rn a l a mplilîer to the LINE INPUT J ACKS @, @ in step (G) of the recording proced u re. VU leve! is controllecl wi th the LI NE VOLUME CONTROLS @, @. The X-353 wil l recorcl a ny source tha t ca n be selec tecl on the extern a l a mplilîe r.
Fig . 17 14. RECORDING FROM ANOTHER TAPE RECORDER
® INPUT
If ano ther X -355 is usecl , connect the LI NE OUTPUT JACK !@,!§of the pl ayback machine to the LINE INPUT JACKS @,® of the recording machine in step (G) of the recording procedure (Figure 17 a). If one of the AKA I M-series reco rcle rs is u ecl as a playback mac hine, conn ect its speaker j acks to the LN IE INPUT JAC KS @,@ of the X-355 in step (G ) of the recorcling procedure (Figure 17 b). VU leve! is controll ecl with the LI NE VOLUME CONTROL @, @.
OPERATING INSTRUCTIONS 15. MONITORING
Step (H) of the recording procedure describes monitoring. If a set of stereo head phones is u. cd they should be of the low impedance type. preferably 8 ohms. If the headphones have rwo se para re plugs, inserr them in the EXTERL AL SPE KER j t\ CK. @>, 1@. The PEAK ER WlTCH @ musc be •·ON". If the hea d phones have only one plug insc rr it into tht: STEREO HEADPHONE JACK @ Tht;o SPEAKER W ITCH l m<~v be "0N"or "OFF". l'vloni roring procedt•res a re the sa me fo r n:cording or pl ayback.
16. REVERBERATION
(AJ Set the SPEAKER SWITCH @ ro "OFF". (B) Push in the RECORD 0 TPUT BUTTON @ a nd the PLAY
RACK OUTPUT BUTION @. ( ) Confirm rha t rhe re are no connection. to the LI :-JE INP UT JACK S
@, •. Fig. 18 D ) lnse r1 the mic rophone plugs into the M ICROPHOt E JACKS @, @ .
(E) Adjust the MICROPHONE VOLUME CO NTROLS z~,@) to
the proper leve! on the VU meters. (F) ln n ·asc the LI E VOLUME CONTR I.S@J,@ ro a pproxi
ma t<> ly max imum. M•C~ (G ) f'l• sh the PLA Y BUTTON @ and the RE ORO AFETY
B TTON @ . The reve rbera tion leve t may be control led by the UNE VOLUME CONTROLS @, @ . Reverberat ion rccord ing can be made monnura ll )' or in stereo.
MIG VOL UM E.
~~ VÔ L UME
~
1 .----- -, ,....- ...
L 1 Ml INI fOR 1 1 1/ u \ 1 AMPLF I>. [ - \ / L ___ _ l ..._ _ _,
17. SOUND ON SOUND
Fig. 19 @
OPERATING INSTRUCTIONS
First Recording (A ) Set the SPEAK CR . W ITCH @1 to "OFF". lB: Confirm tha t rherc: a n: no conn e<.: tian · to the U NE I:'IIP T j i\ 1( -
@. @ . iC I Set the TRACK SELECTOR K:'IIOB @ w ' ·1-+" fot· record ing on
track 1. tD,> Set the FU. C T IO SW ITCH @ to "STE REO". (E) lnscrt the microphone plug in the LEFT M ICROPHONE j ACK @. (P) Adjust the LEFT MICROPHON E VOLUME CONTROL @ to
the proper level on the VU meter. (G) Push the PLA Y BU1TON @ and the RECORD SAF ETY
BUTTON @ a nd make the first recording, i.e. Do-Re-Mi . (H J When the first reco rding is complete, rewind the tape tO the starting
position .
Second Recording ilJ Confi rm that the RECORD OUTP T BUTTON @ and the PLAY
BAC K O UTPUT BUTTO N@ are bot h in the O UT position. IJ ) Set the TRACK SELECTOR K 013 @ to ''3-2" for recording on
trac k 3 while listening to t ra k 1. IKJ In crease the LEFT U NE OLUME CO NTROL @ t0 approxi
ma tely maximum. 1L ) Connect the ste rt'O headphones to monitor the firs t recording on the
le ft cha nnel (track l ). ' M i Pu sh the PLAY BUrrON 3 antl the RECORD . FETY
B TTON @ The first recording will be beard throug h the headphones.
(N) R ese t the LEFT LI E VOLUME COt TROL @ to the prof>Cr level by watching the left channel VU meter.
(0 ) After the rese t, rcwind the tape again to the sta rting point. (P) Push the PLAY BUTTON@ and the RECORD A I·'E' IY
BUTTON @. The second recording, Mi-Fa- ol, is made on track 3 as th lirs t recording, Do-Re-Mi, is monitored in the headphones. The two will be completely mcrgcd on track 3, i.e., (Do-Re-Mi, Mi-Fa-Sol).
(Q ) The third and subsequent recordings are made rhe samc:: as the second b)' switching the TR C K SELECTOR K NOB @ to " 1-4", "3-2" etc .
OPERATING INSTRUCTIONS 18. SOUND W ITH SOUND
To record sound wirh sound substitute the following step for ste p (K) of the sound on sound p.-ocedur·c a nd e limirHrt e s te p •N .
(K) Decrease the LEFT LI:-JE VOLUME CONTR OL @ to minimum.
19. FAST-FORWARD AND REWIND To u'c f':N-f'orwa rd or r·ewi nd, push the F:\ST-FOR W!\ RJ) 13UT TO:"J
4 or th ~ REW INO BL:TI"O r @. Pu ll the LOWE R HEAO COVER r.§.l clown to keep the ta pe off the
hcad s durrng th ~ high spced o pera tion . Only the STOP BUTTON {!)
~ houle! be used to stOp fas t-forwa rcl ur rewincl . Push the I.OWER I-IE!\0
COVER 1§1 bac k up bd'ore beginning rla )'back o r recording.
20. TAPE SPEED CHANGE To sd cet the d ..:sin:d ta pe s pc~d , me the SPEEO CI-1.\ :\'GE SW ITCI-I t;9
in rhe ce nter uf the pa nel. Fur high spced ta pe duplica tion , 15 ips ca n
be se leu ed by a tt ac hing the extra ~a p~ ta n a nd pinth wh~r· l con m in t·d in
the stancl ;rrd act cssorics.
21. HEAD CLEANING i\ftc r every few hours of ope ration, the hea ds wil l ac<:urrru la te srr rall qu a n.
Fig. 20
Fig. 21 @
l..ities of the brownish-recl oxicle with which the tape is coa ted . lf the Fig. 22
heads a re rror rl r:an t>d regula rl y, hig h frr::quenr y response a nrl fldelity , in
gene ra l will suff<:' r . Ciea n the ht>a d . wirh a soft conon swa b . oa ked rn
rubbing a kohnl or carbon te t r<rr hlorirl r::.
Fi.rr. 23
22. HEAD DEMAGNETIZATION OPERATING INSTRU CTlUN;j
Normally, in ail tape recorders, the heads will become slightly magnetiz
ed. A slightl y magne ti zed head will partial! y erase a recordee! tape with
high frequencies suffc ring the g rea test !osses. Severe magnetization will
re ult if magn e tized tool s a re used in the vic inity of the heads. Th t>
X-355 has a bui lt in head demagne ti z ing c ircuit ; however, periocli c de
magn e ti za tion with a demagn e ti ze r is s till recommended . After removing
the LOW I~ R HEAD COVER @, the heatls can be cl emagne tized by
touc hing the heads lightly wi th the demagne ti ze r nnd ma king small
c- ircu lar motions O"er the en tire head surface and hea 1 ho using.
23. TRANSISTOR PROTECTION The S. E. P. P. O. T . L. sys t<' m is used to pr·o tec t the ou tput cirnritr y of the X-355 ma in a mpli fi e rs. The minimum output impt" da nce sho uld
be 8 ohm<.. If a >P ·; rk ~r of les' tha n B ohm; irnped:tnte is u~<:d or if the >peake r termin a is are acc identa i! y shorted , the prot t'C tor fu se will bio" ·
to protect the transi. tors. TransistOr> art• r·asil~· da111agcd b y excessive loacl or high a rllbient tempera tures. If the proter tor fu se has b lown,
the sound nw · be di . torted or th t::re ma y be no sound at a il. The prott·nor fu se may be re placecl with a n y suiwhlc c-onllnercia l 1:\ fu >e .
24. VENTILATION The V(" lltil a ti on ystem of the X-355 is desig ne e! tO p revent int e rnai a('c umula tion of excess hea r th ar wou id shone n the !ife of th t" <'Oll lpone rll
pa rt . lt i recommendecl rha t the X-355 b - placee! o tha t air ma y c ircu la te freely a round it.
ill ACCESSORIES 1. ACCESSORIES OPTIONAL
Extension Arms for 10- 112• Reels No. EA-10 Long hours of record ing and playba k cao be made un intcrru pted ly
by using the Acces ory No. EA-10 extension arms wi th 10- 1 12" reels.
T he forego ing recording or playing time may be cxrended twice as
much as using 7- 1 /2" tape. 10- 1 i2" cmpty ree ls and recordi~g tape
wi ll be awti lable by op tional accessories.
Remote Control Unit No. RC-11 Ail opera ting functi on~ of the Mnd ·1 X-355 recorde r can b · con trol led
rernotclv by u ing the Acce sory o. RC- 11 remote control unit
wi th 10 fer t long cable. (If long cable is requested 11>:1)' obtain
through our authorized distributor. J
Condenser Microphones, No. CM-15 Akai's w r ' l a r ~s t high lïdeJi ty rnirrophone i designcd for the profes.
siona l and H i.Fi enthusiast. This unit consists of a microphone and
pre~'lmp!tfier , and perrnits simultaneou · use of two microphones for stereo pu rpŒc.
Frequency respo11 e: 50 to 15,000
Dynamic Microphones, No. DM-13 Although compact, extremcly high qua lity dy na mic rntc rophones.
They are guaran teed to give complete sa tisfac tion to tht most cri tical
aud io en thua ist a nd professional use rs.
Frcquency response; 50 10 12.000
EA-1 0
CM-15
DM-13
ACCESSORIES OPTIONAL ACCESSORIES
AS -3
AM ·4P
AH -6
Tape Splicer No. AS-3 This Tape plice r is a small pocketable deviee and not only prov,dn
casy spli ring but a lso preserves the original qualit • o f recordi ng.
Monitor Earpone Nos. AM-4 & AM-4P The Monitor Ea rphone i uscd both for recording and playback. l t is
quir t• u eful monitoring programs being rerorded on tape. During
playbark. just plugging it into the recorder ' s .'pcaker OutpUI j ack 'ill
provide li stcning w high fid elit y sound wi thout disturbing the others.
A high impedance rystal t ype in two different modds is avai lable,
as :-:hown in Pictures.
Head Demagnetizer No. AH-6 i\'onna ll the stee l pole pieccs which form a pa rr of the tape heads
bccome !ig hil) rnagnetized. The effeu of the slight magnetization
is to panial ly crase the ta pe (with high frequen cies suA'ering most).
A Jk riodi r.a l applica ti on of dw Head Demagncti zer is the best way to
kcep the origina l qualit y o f the tapes. The AH-fi has a built.in on.off
switrh a nrl a n~on bulb.
Telephone Pick-up No. AP-2 Thi s is cl esigned to record telephone conversa t1 " " with maxirm11n
cla rity and sensitivity . r\djust press on to rh e bac k of the telephone,
rubb r suction eup holds the Pick-Up in pmi ti ons.
ACCESSORIES
Tape Erase r No. ATE-7 This unit e rases any previously reeorded materials completely in a few seconds and accomodates tape ree ls from 3" to 7.1 / 2" in diamete r. l t is dcsigncd to pro vide maximum erasing cfficiency . Has a pop.up shaft to hold the tape reel in position and a lso serves as a power switcb and on.off bulb indi cator of the unit.
Stereo H eadphone No. ASE-9S l n order to enjoy truc stereophonie cffec ts with the Akai tape recorder, the Stereo Headphones ASE-9 · is rccommendable.
Head Cleaning Kit, No. HC-500 HEAD CLEANER proves its va lue' ben used to wipe off the brovm. ish.red oxide powde rs tha t accumula te on both the head assembly a nd pinch wheel. Since thesc powde rs prevent high frequcnc y responsc, we arc recommendablc to use adequate head cleane r.
AKA I Magnetic Tape & Tape R eel AKAI Mag netic Tape
AT.SS (600 feet ) AT.7S (1200 feet) AT-lOS (2400 feet ) AT.SL (900 feet ) AT-7L (1800 fee t) AT.IOL (3600 feet )
AKAl Tape R eel ATR.S (for 5" ) ATR.7 (for 7")
ACCESSORIES OPTIONAL
ATE -7
ASE -9S
HC-500
MA GNETIC TAPE TAPE REEL -------------------
2. ACCESSORIES SPEAKERS ACCESSORIES
The following stereo speaker system Modcl SS- 11 0 and W-1 30 are specially designed to match impeda nce to Akai's stereo tape recorde rs and to obtain the best resu lt. Y ou will a1ways be able to derive true Hi-Fi sound reproduction with the combinat ion of the SS- 110 or SW- 130 and any Akai Stereo Tape Recorder.
MO DEL 55-110 Speaker Impedance Max. Power Input Frcquency R a nge Dim ensions Weight
10" coa,i a l (w ith bui lt-in 3- 1 12" tweeter )
8 ohms lOwatts so~ 17,000 rps
20.l B'' W x 19" H 15.3 4"D 35.3 lbs
MODEL SW-130 Speaker Impedance Max. Power Input Frequency R ange Dimensions
Wcight
12 " Woofer & 3- Y! " Tweeter 8 ohms 2. watts 50~ 18,000 cp
16-1 "2"W 22- l 2" H 12.1 8" D 28.9 lbs.
3. ACCESSORIES STANDARD
7" Demonst ra tion tape ·
7" Automatic R ee l ....... . ... .. . . . .. ... . . ... 1
Reel Holder · ·. 2
15 ips. Adaptor Kit .. .. . ....... . .... ..... . .
Spa re Fuse (1 A) ..... . .. ... .. .. . .. .. .... 2
X -355 Operator's Manual . .. .. .. .. .... .. . .... 1
IV LUBLICATION CHART FOR X-355 LUBLICATION POINTS
INDEX COUNTER
M ain motor··· · ····· · ·· replace two bea ring Le ft and right motors· · ·replace a bea ring Impedance R alle r · · ·replace a two bea ing
Ca pst an sha ft · · · · · · · · · · · ··· · ········ · · ··2 drops Pin ch wheel ha ft · · ·· · ... .. ... ·· ·· · ·· ·2 drops
Selec tor · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 1 drop
22967108
Priee ~ 360.00 us $ 1.00
MANUFACTURED & DISTRIBUTED BY
AKAI ELECI'RIC CO., LTD. AKAI TRADING CO., LTD.
12, 2-chome, Higashi-Kojiya ,
Ohta-ku, Tokyo, Japan
PHONE, Tokyo 7 4 1-1426-9
P r inted in J a pa n