Akai GX-400D Owners Manual

Download

Page 1

GX-4DDD

STEREO TAPE DECK

OPERATOR' S MANUAL

IDJ] ~ Dm

,:~

.'.

-=:.7

T~T~a

i I ,

-----

1mB

MANUFACTURED& DISTRIBUTEDBY AKAI ELECTRICCD., LTD./AKAI TRADINGCO., LTD./AKAI AMERICALTO.

Page 2

~. ~ .

i I

......

.."...".

ALL GX (glass & single crystal ferrite) HEADS

Akai has equipped this model wfth its new and amazing GX Heads to bring you unequalled open reel high fidelity

sound. With the symmetrical head block lay-out and dual

capstan drive system of this model, an undistorted wide

frequency response range covering 30,000 Hz für com-

pletely professional performance. With the GX Heads, a

wider dynamie range and excellent signal-to-noise ratio are

also attained. These accomplishments are contributable to head materials, superior processing technique, and a "focused-field" recording system. The core of these extra-

ordinary heads are made of single crystal ferrite and are

mounted and set in glass. This focused-field recording

system minimizes high frequency lass and eliminates undue

equalization für perfect recording results.

A.D.R SYSTEM

The GX-400D incorporates Akai's new and unique Auto- matie Distortion Reduction circuit. This circuit prevents

interference and beat noise from occuring during high input

recording. At input signals over 8,000 Hz where tape is easily saturated, the selective network of the A.D.R circuit

is automatically activated to change the recording equali-

zation according to input. The result is clear and dis-

tortionless high range playback over an extended frequency

range.

...

..".;

Page 3

INDEX

Controls 2 PIease read the following

precau tions before operation. . . . . . . . . . . . . . . . . . . 4

Howtoload amagnetic tape 4 4-Track stereo recording and

playback system 5 4-Track monaural recording and

playback system 5 Automatic and manual reverse

recordingandplayback , 5

Tapeselectorswitch 6

Tapespeedselection 6

Direct function change control system. . . . . . . . . . . .. 6

Cueswitch 6 Automaticstopandshut-off

Pausecontrol 6

Remotecontrol 6 Connectionsforplayback 7 Playback 8 Connectionsforrecording 9 Recording 10 Echo effect IO Sound-on-soundrecording 111 Soundmixing 11

Tapeerasing 11 Tape splicing andediting 11

Heads should always be kept clean. . . . . . . . . . . . . . . 212

Pinch wlieel and capstan cleaning 212 Headdemagnetizing 12

Voltage and cycle conversion . . . . . . . . . . . . . . . . . . . . 1313

Technicaldata 14 Standardaccessories 14 Troubleshootingchart 15

[I]

Page 4

CONTROLS

t ,t'

[1J

E!]]E!]ö =0

=:i

Page 5

I. BUlLT-IN REEL RETAINER

To lock reel firmly into place, pull tip of retainer outward and turn to left or fight.

2. SUPPLY REEL TABLE

3. REEL SIZE SELECTOR Set to "10 in" position when using employ standard accessory reel adapter hubs.

4. CUE SWITCH For precision cueing and editing. Refer to "Cue Switch",

page 6.

5. HEAD COVER Houses (from left) Reverse Playback, Reverse Recording/Erase

combination, Forward Recording/Erase combination, and Forward Playback GX Heads.

6. TAPE SPEED SELECTOR SWITCH Set according to desired speed. For professional high fidelity recording, 15 ips tape speed is recommended.

7. PINCH WHEEL Presses against left capstan to transport tape.

This dual capstan system provides perfect tape stability in both directions.

8. CAPSTAN

9. SENSING POLE/TAPE GOlDE Sensing pole reverses tape direction (foward to reverse).

10. SHUT-OFF/TENSION LEVER At the end of the tape when this lever drops, if tl1e Automatie Shut-Off Switch is set to ON position, the automatic shut-off circuit is activated to cut off the power of the entire unit. Tension lever function provides proper tape tension.

11. DlRECTlON INDICATOR LAMPS

Lights to indieate direction of capstan motor rotation.

12. REVERSE SELECTOR SWITCH

Refer to "Automatie and Manual Reverse Recording and

Playback".

13. POWER SWITCH

14. SHUT-OFF SWITCH Set to ON position for automatie shut-off. See item 9 above.

15. VU METER Indieates left channel recording and playback levels. Normal recording is

16. MIC-l/DIN INPUT LEVEL CONTROL Controls Mic-l (left) and left channel Din input volume.

17. TAPESELECTORSWITCH Set to S.R.T position when using Akai S.R.T (super range) tape or other make low noise tape. Set to NORMAL when using regular tape.

18. MIC-l/DIN INPUT LEVEL CONTROL Controls Mic-l (right) and fight channel Din input volume.

19. VU METER Indicates fight channel recording and playback levels. Normal recprding level is

20. HEADPHONE VOLUME CONTROL Controls headphone output volume. Set Line Out Volume Control to

Volume Control.

21. HEADPHONEJACK

Accomodates any low impedimce 8 n type stereo headphones for monitoring or headphone listening.

22. BUlLT-IN REEL RETAINER

To lock reel firmly into place, puB tip of retainer outward and

turn to left or fight.

23. T AKE-UP REEL T ABLE

24. PAUSE SWITCH AND PAUSE INDICATOR LAMP

Convenient for temporarily suspending tape travel during recording or playback. Pause Indieator Lamp lights to confirm pause mode.

25. RECORDING SAFETY BUTTON

While holding this button at depressed position, depress Forward Button to effect recording mode.

position when using 10-1/2" reels and to

7" or 5"

VU.

"0"

VU.

"0"

VU (position 5) and then adjust Headphone

"0"

reels. When using 10-1/2" reels,

"7 in"

26. MIC-2/UNE INPUT LEVEL CONTROt Controls Mic-2 (Ieft) and left liDe input volume.

27. REWIND BUTION

Rewinds tape at high speed.

28. PINCH WHEEL

29. CAPSTAN

Presses against fight capstan to transport tape.

30. TAPE GUIDE

31. AUTOMA TlC STOP/TENSTION LEVER AND SENSING POLE At the end of the tape, when this lever drops, if the Automatic

Shut-Off Switch is at OFF position, the automatic stop circuit is activated to stop reet movement. Also functions as sensing pole for reserve to forward operation.

32. INDEX COUNTER & RESET BUTION

33. REVERSE BUTTON Depress to effect manual reverse (changes direction of tape

from forward to reverse).

34. FAST FORWARD BUTTON Advances tape of high speed.

35. FORWARD BUTTON Advances tape for playback or recording mode.

36. STOP BUTION

37. MONITOR SWITCH Depress SOURCE Monitor Switch to monitor source during recording, and TAPE Monitor Switch for playback or private headphone listening or for monitoring recorded signals during recording mode.

38. UNE OUTPUT LEVEL CONTROL

Adjust left liDe output volume du ring playback.

39. TRACK SELECTOR SWITCHES Left: tracks 1-4, Right: tracks 3-2, Left and Right: Stereo

40. MIC-2/UNE INPUT LEVEL CONTROL

Controls Mic-2 (right) and fight line input volume.

41. MIC-l MICROPHONE JACKS

42. UNE OUTPUT LEVEL CONTROL

Adjusts fight liDe output volume at playback time.

43. MIC-2 MICROPHONE JACKS

44. CYCLE CONVERSION SWITCH

Set to SO Hz or 60 Hz according to area power source.

45. A.c. OUTLETS

These extra AC outlets are unswitched (not inter-locked with the Power Switch) so thaI power is applied even with the GX-400D turned off.

46. UNE OUTPUT JACKS

Connects to tape input or aux jacks of external amplifier for pla yback.

47. S.O.S/ECHO SELECTOR SWITCH

S.O.S: For Sound-on-Sound recording. Refer to page 11. Echo: For recording with echo effect. Normal; Normal recording.

Except when rnaking an S.O.S or an echo-effect recording,

this switch must always be set to NORMAL position.

48. DlN JACK Enables inter-connectionwith an external amplifier with a single

Din cord.

49. RE MO TE CONTROL SOCKET Accomodates Akai Remote Control Unit RC-I 7.

SO. UNIVERSAL VOLTAGE SELECTOR AND FUSE POST

Offers six stages of voltage for worldwide operation. Refer to

"Voltage and Cycle Conversion", page 13.

5 I. UNE INPUT JACKS

Connects to output jacks of external source.

52. DlN JACK INPUT SELECTOR SWITCH

When using the Din lack, if the output level of your external amplifier is high, set this switch to HIGH, and of low, set to LOW position.

Page 6

PLEASE READ TUE FOLLOWING PRECAUTIONS BEFORE OPERATION

* Your machine requires constan t voltage fOT optimum

performance. Pie ase feier to voltage and cycle con- * Avoid using extremely thin tape whenever possible.

version procedure on page 13 if change of voltage or When the use of such tape is unavoidable, be sure to

cycles is necessary. depress the Stop Button before changing modes.

* As dirty heads and magnetized heads become the

source of logs of sound, distortion, sound drop-out, may have become sticky, run tape once before using. and other recording and playback failures, the heads most be kept clean and demagnetized at all times.

* Place machine on a flat level surface. Operate in either

vertical or horizontal position.

Do not place anything on top of the unit which will

obstruct the ventilator.

If the sound sources are so rar away from the

microphones that the input level controls most be

tumed to maximum, some hum or noise will inevitably be recorded. A test recording is recommended before making a final

recording.

....

'i~-"'.

'~I

I" I

~ I

Use good quality tape. New tape gives best results.

As tapes which have not been used fOTaperiod of time

Always store tapes in a cool, dry place.

Should there be a problem with your machine, write down the model and serial numbers and all pertinent data regarding warranty coverage as weIl as a clear description of the existing trouble and contact your nearest authorized Akai Service Station or the Service Department of Akai

Company, Tokyo, Japan.

UOW TO LOAD A MAGNETIC TAPE

I. PIace a full reel of tape on the supply reel table and an

empty reel on the take-np reel table.

2. Lock both reels into place by pulling tip of re el retainers out ward and tuming to left or fight.

3. Unwind about a 85 cm length of tape from the supply reel and thread the tape as shown by the dotted lines in the figure.

4. Insert end of tape in slot of empty reel and wind around reel hu b two or three times.

5. Continue winding tape onto take-np reel until all tape slack hag been taken up.

When using 10-1/2" reels, place the standard accessory reel adapter hubs on left and fight reel tables and lock into

place by pulling tip of reel retainers outward and tuming to left or fight. When using 10-1/2" metallic reels

Fit hubs over reel tables so that the white lIDes on the inner

and outer adapter hubs are aligned and match these lines

with dot on reel table (rubber bumpers of adapter will be

aligned with and rest on the rubber bumpers of the re el

table).

When using 10-1/2" plastic reels

Fit hubs over reel tables so that the white lines on the inner

and outer adapter hubs are aligned, hut do not match with

dot on reel table (rubber bumpers of adapter will enter

grooves between bumpers of reel table and vice-versa).

Page 7

Track1

STEREO I I

. StereoL1-

. StereoR1-

R2-

L2-

Track 1

4-TRACK STEREO RECORDING AND

3 4

L1-

R2- R1- L2--

PLAYBACK SYSTEM 4-track stereo eecording and playback requires the sirnul- taneous use of two tracks. For stereo operation, depress both Track Selector Switches. The first recording or

playback takes place on tracks 1 and 3 and the second on

tracks 2 and 4 after the recorder has been set to reverse

mode.

Track 1

MONAURAL

Mono 1 -

Mono1-

2--

.- ....

4-TRACK MONAURAL RECORDING AND PLA YBACK SYSTEM

4-track monaural recording and playback sequence is

1-4-3-2. For monaural operation, depress the LEFT Track

Selector Switch. The first recording or playback takes place on track 1 and second on track 4 after the recorder has been set to reverse mode. For recording or playback on track 3-2, depress the RIGHT Track Selector Switch. The third recording or playback takes place on track 3 and the fourth on track 2 after the recorder has been set to reverse mode.

As this model records in reverse direction, it is not necessary to invert reels.

AUTOMA TIC AND MANUAL REVERSE

RECORDING AND PLAYBACK

For automatie reverse recording or playback (from forward to reverse direction), affix about a 2.5 cm (1") long piece of metallic sensing foi! to the outside of the magnetic tape at desired reversing point. If continuous reverse between two points is desired, affix another piece of sensing foil to the inside of the magnetic tape at desired reversing point.

As the sensing foil passes the sensing poles, reverse is

effected depending upon the position of the Reverse Selector.

Single cycle reverse Set Reverse Selector Switch to SINGLE position. The tape will record (playback) Olle forward and reverse cyc1e and then automatically stop.

Non-reverse

Set Reverse Selector Switch to OFF position. Recording

(playback) will be effected in Olle direction only. At this setting, one-way recording or playback will be effected

whether or not sensing foi! is applied to the tape.

Continuous reverse

Set Reverse Selector Switch to CaNT position. Recording

(playback) will continue in both directions until the Stop Button is depressed.

.When manual operation of any of these functions is desired,

operate the Reverse Button.

[ID

Page 8

.....

TAPE SELECTOR SWITCH This model is equipped with a Tape Selector Switch. Use of this switch brings out the maximum response of high performance low noise tapes and works to change the recording equalization according to the tape. The combi- nation of Akai GX Heads and low noise tape hag enabled startling progress in tone quality.

When low noise tape is not being used, this switch must be set to NORMAL position.

TAPE SPEED SELECTION This model can be operated at 15, 7-1/2, or 3-3/4 ips tape speed. Simply depress Tape Speed Selector Switch accord- ing to desired speed. Recording time with an 1,800 ft. tape is as follows: (stereo) 3 hrs at 3-3/4 ips; 1.5 hrs. at 7-1/2 ips: 45 min. at 15 ips.

For professional recording, 15 ips tape speed is recommended.

DIRECT FUNCTION CHANGE CONTROL SYSTEM

This model employs a direct function change contral system foT speedy mode selection. The necessity of depressing the Stop Button before changing modes is eliminated. Further the controls are equipped with in- dividual colored lights which indicate each operating mode.

The use of extremely thin tape should be avoided. When the use of such tape is absolutely necessary, it is recommended thaI the

Stop Button be depressed before changing operating mo des.

PAUSE CONTROL

This model is equipped with a Pause Switch foT momen-

tarily stopping tape travel du ring recording or playback.

This feature is especially convenient foT editing tapes.

Simply set Pause Switch in direction of the arrow when

a certain portion of the program is not desired. Note that

the Pause lndicator Lamp will light to confirm pause mode. Return Pause Switch to normai position to resurne record-

ing.

REMOTE CONTROL All operating functions of this model can be remote controlled by using Akai Remote Contral unit RC-17 optional accessory. Plugs into Remote Contral Socket on rear panel.

CUE SWITCH The Cue Switch facilitates precision cueing and editing. When the switch is set to ON position during fast forward or rewind, a "tweeting" sound can be heard where there are recordings on the tape. Where there are no recordings, or at the blank space between recordings, no sound is audible. After stopping tape at desired position, move reels while listening to the sound, so thai the correct location is obtained.

When using the Cue Switch the TAPE Monitor Switch must be at depressed position,

AUTOMA TIC STOP AND SHUT-OFF Olle of the exclusive features of this model 'is the Automatie Stop/Shut-Off function of the unit.

Automatie Stop

At the end of the tape, the automatie stop circuit is

activated and reel movement is stopped.

Automatie Shut-Off

For automatie shut-off, set the Automatie Shut-Off Switch

in direction of the arraw. At the end of the tape, the

shut-off circuit is activated and the power of the entire unit

is cut off.

[ID

Page 9

CONNECTIONS FOR PLAYBACK

ECHO S.O..

ND"

~ "

[

. 0

'EF~'NE

UR~GH

( . ~,- ~

J .~ -

The Din Jack of the GX-400D can be used instead

of the Une Output J acks for connection with the extemal stereo amplifier. This enables playback or recording with a single connection cord.

e:e:

,on

""."'"@

"'"'

- -

!;]

H';'" LEF';:-'NE ";::'GHT

- ' 0'

LeW

RCA/RCA plug connec- tion cord

SPEAKER

DIN/DIN plug connec- tion cord

SPEAKER

For private headphone listening, use stereo heaphones of 8 n impedance.

[l]

Page 10

~""

e e

PLA YBACK

Make necessary connections as shown in CONNECTIONS FOR PLAYBACK, and lead the operating precautions on

page 4 before beginning operation. Then, load a pre- recorded tape following the instructions on page 4 .

Stereo Playback

l. Connect power cord and turn on Power Switch (A).

2. Set Reel Size Selector (B) according to reel size.

3. Depress both left and fight Track Selector Switches (C).

Select tape speed with Tape Speed Selector Switch (D).

4. Depress TAPE Monitor Switch (E).

5. Depress Forward Button (F) to begin playback.

6. Adjust left and fight Line Output Level Controls (G)

7. and external amplifier controls.

8. Depress Reverse Button (H) fOTreverse playback.

9. Depress Stop Button (I) to stop playback.

Monaural Playback Follow stereo playback procedure substituting the follow- ing steps fOTsteps (3), (7) and (8).

Tracks 1-4

3. Depress left Track Selector Switch.

7. Adjust left Line Output Level Control and external amplifier controls.

8. Depress Reverse Button fOTplayback of track 4.

Tracks 3-2

3. Depress fight Track Selector Switch.

7. Adjust fight Line Output Level Control and external amplifier controls.

8. Depress Reverse Button fOTplayback of track 2.

[ID

Page 11

CONNECTIONS FOR RECORDING

..c,.,o

, "";

ES ---1

1': «JJ0 0 0

.....

Stereo tuner

H'GH

~Lew

Q]l'l'l'n

0000

CO:]

Select desired source and connect to the Une Input Jacks of the GX-400D

~;~~~"~'~.

Stereo tape deck or recorder.

Da not connect the Din Jack of this model to the Din Jack of the GX-400D.

LEH

0'"

"'NE

I I

OUT

R'GHT

ND"

ECHO

The, Din 1ack of the GX-400D can be used instead of the Une Input Jacks for connection with the externat stereo amplifier. This enables recording or playback with a single connection cord. In this case set Din Jack Input Selector Switch to HIGH or LOW position to correspond with the

output of the amplifier.

)

r' "",

~~~}I

Turntable with magne- tic cartridge.

4f)

1-\.' ~

B,O,8

-- - - -

'-F'

It11IIMIIB

lIiiiiI iii:i!i:iiIiiiiiiiIIIJ

I ,,-~"

'i"'~"'I,:"","I',,"I

I~. '1:'1' I',..

~ -

Use MIC-l or MIC-2 or MIC-I and MIC-2 together.

',',','

..;

Record player with crystal or ceramic pick-up.

,,,,

.."

;

- -

RCA/RCA plug connec-

tion cord

DIN/DIN plug connection cord

For monitoring use stereo headphones of 8 .n impedance.

[ID

Page 12

RECORDING

m:n ~, ~

~." '.

Make necessary program source connection to the appro- priate inputs of this model as shown in CONNECTIONS FOR RECORDING, and read the operating precautions on page 4 be fore beginning operation. Then, load a tape

following the instructions on page 4.

Stereo Recording

1. Connect power cord and turn on Power Switch (A).

2. Set Reel Size Selector (B) according to reel size.

3. Depress both left and fight Track Selector Switches (C).

4. Select tape speed with Tape Speed Selector Switch (D).

5. Set Index Counter (E) to "0000." This provides an easy reference für locating positions on the tape.

6. Set Tape Selector Switch (F) to proper position. S.R.T position is für Akai Super Range Tape or other make low noise tapes, NORMAL position is für regular tapes.

7. Depress SOURCE Monitor Switch (G).

8. Adjust and balance input level with appropriate left and fight Input Level Controls (H) while observing left and fight VU Meters. Normal recording should not

exceed zero VU level on either meter.

9. When an optimum recording level hag been determined,

while holding the Recording Safety Button (I) at depressed position, depress Forward Button (1) to begin recording.

10. Depress Stop Button (K) to stop recording. To momentarily stop tape movement use Pause Button.

For normal recording, the S.O.S./Echo Selector Switch, at rear of unit must be set to NOR. position.

For automatie reverse recording, please refer to page S.

l1Q)

Monaural Recording For monaural recording, follow stereo recording procedure, substituting the following steps für steps (3), (8), and add

step ( 11).

Tracks 1-4

3. Depress left Track Selector Switch.

8. Adjust and balance input level with appropriate left Input Level Control while observing the left VU Meter. Normal recording should not exceed zero VU level.

11. For reverse recording on track 4, while holding Recording Safety Button at depressed position, depress Reverse Bu tton.

Tracks 3-2

3. Depress fight Track Selector Switch.

8. Adjust and balance inp4t level with appropriate fight Input Level Control while observing the fight VU Meter. Normal recording should not exceed zero VU level.

11. For reverse recording on track 2, while holding Recording Safety Button at depressed position, depress Reverse Button.

ECHO EFFECT

For an interesting reverberation effect during recording, follow recording procedure and set the S.O EcEEcho

Selector Switch at rear of unit to ECHO position after

accomplishing step 9. Note that the MIC-2jLINE Input Level Controls must be set to maximum.

4.v

Page 13

SOUND-ON-SOUND RECORDING

For transfer of previously recorded material from one track to another accumulating as many individual recordings on a single track as is desired. Use für language training or

various interesting musical compilations.

First Recording

1. Connect power cord and turn on Power Switch.

2. Confirm that there are no connections to the input jacks and turn all input level controls to minimum.

3. Plug in microphone to left Mic-I Microphone Jack.

.4. Depress left Track Selector Switch für recording on

track 1.

5. Depress SOURCE Monitor Switch.

6. Adjust left MIC-I/DIN Input Level Control while

observing the left VU Meter.

7. With Reset Button, set Index Counter to "0000".

8. While holding Recording Safety Button at depressed

position, depress Forward Button to begin first record-

ing; Le., Do-Re-Mi-.

9. When the first recording is completed, rewind tape to

starting point.

Second Recording

10. Confirm that the Monitor Switch is at SOURCE position and set S.O.S./Echo Selector Switch at rear of

unit to S.O.S. position.

11. Depress fight Track Selector Switch für recording on track 3 while monitoring track 1 through headphones.

The left Track Selector Switch must be set to OUT position.

12. Set Line Output Level Controls to "0" VU (position 5) and plug in microphone to fight Mic-l Microphone Jack.

13. Set fight MIC-I/DIN and MIC-2/UNE Input Level Controls to about position 7 or 8.

14. Connect stereo headphones für monitoring the first recording on track 1.

15. While holding Recording Safety Button at depressed position, depress Forward Button to be gin recording; i.e., Do-Do'-Re-Re'-Mi-Mi'oo.

The second recording (Do'-Re'-Mi' . . .) is made on track 3 as the first recording (Do-Re-Mi. . .) is heard through headphones. The two recordingswill merge on track 3 (Do-Do'-Re-Re'-Mi-Mi' . . .).

The third (Left MIC-2jLINE Input Level Control must be set to same level as fight MIC-2jLINE Input Level Control) and sub-

sequent recordings are made in the same way as the second by

switching Track Selector Switches to and from 1-4, 3-2 and

reinserting microphone to corresponding channel. For playback, set Track Selector Switch to track on which the last recording was made, depress the TAPE Monitor Switch, and set the S.O.SjEcho Selector Switch to NOR position.

SOUND MIXING

One of the features of this model is its varied sound mixing

ability. MIC-I + UNE, MIC-2 + DlN, UNE + DlN, or MIC-I + MIC-2 can easily be accomplished. For sound

mixing, choose any of the above combinations and follow

recording procedure, connecting source to appropriate

inputs, and adjusting input level controls accordingly in

step 8.

TAPE ERASING

Any signals previously recorded on the tape will be

automatically erased as a new recording is made. For erasing only, thread tape and set machine to recording mode. No plugs should be connected to the input jacks and

the input level controls should be kept at minimum. For

quick and complete erasure, a bulk tape eraser is recom- mended.

Be sure that the proper Track Selector Switches are depressed. If both switches are depressed, both the left and fight channels will be erased.

TAPE SPLICING AND EDITING

[

/,-'

~L7

/ /__J

Cut the tape diagonally with an overlap so that the ends are lined up. Cutting tape on the diagonal eliminates detection of the splice in recording. Cover aligned ends with splicing tape, exerting pressure to secure ends evenly. Trim off excess splicing tape. Cutting into the tape very slightly will eliminate the possibility of a sticky splice. Splicing using scissors requires skillful work. For smooth and easy spicing, Akai Tape Splicer AS-3 is highly recommended.

[ß]

Page 14

MAINTENANCE

HEADS SHOULD ALWAYS BE KEPT CLEAN The GX Heads do not norma11y require cleaning. However, if old tapes or tapes which have been spliced are used, head cleaning is recommended. Clean with a cotton swab stick which has been dipped in Akai Head Cleaning fluid flom Head Cleaning Kit HC-SOO. If this fluid is not available, use

'"i,_~

,,'.

alcohoL

.......

PINCH WHEEL AND CAPSTAN CLEANING

If foreign matter is allowed to accumulate on the pinch

wheels and capstans, these particles will come off on the

tape causing deterioration of sound quality. Oil adhering to

the capstans also causes irregularity in tape transport. It is,

therefore, recommended that these parts be wiped clean

periodically. For pinch wheel and capstan cleaning, use

Akai Head Cleaning Kit HC-SOO, or. if this is not available,

use alcohoL

00 not use chemicals such as chlorothane, etc. as the rubber parts will deteriorate.

HEAD DEMAGNETIZING &.

Normally, the steel pole pie ces which form part of the recording and playback heads become slightly magnetized. The effect of magnetization is that it causes considerable

drop-out and introduces noise into the recordings. It is, therefore, recommended that head demagnetizing be per-

formed periodica11y. This can be accomplished with a bulk head demagnetizer by bringing it close to the heads and making several circular motions over a11head surface areas as weil as the head housing.

Be sure to cut off the power of the unit prior to demagnetizing the heads.

00 not use magnetized tools in the vicinity of the heads or VU Meters.

ffl]

Page 15

./'

~x- '

.JIII'.JIII' ~

\ L

L-

Fuse Post

use

Voltage

Selector PI

VOLTAGE & CYCLE CONVERSION

Voltage This model is equipped with a built-in step-down trans-

former offering six stages of power voltage from 100 V to 240 V A.C. fOT world-wide operation. Voltage is preset at the factory according to destination. However, the operator

is requested to check the setting prior to operation, and, if necessary, adju'st as follows: (A) Oisconnect power cord

and remove Fuse Post by turning in direction of arrow. (B)

Reset voltage selector pluS so that proper area voltage shows

through the pluS cut-out. (C) Change fuge according to

voltage: 100 V to 120 V: 2.5 A Fuse; 200 V to 240 V:

1.5 A Fuse. (0) Tighten fuge post.

Be sure to disconnect power cord before attempting to readjust

voltage.

For optimum performance the Une voltage must be held within a

10% deviation of standard area voltage.

Cycles Correct tape speed cannot be obtained if the Cycle Conversion Switch on rear panel is not properly positioned. Set to 50 Hz or 60 Hz according to area power source.

Page 16

TECHNICAL DATA

Track System. . . . . . . . . 4 track 2 channel stereo/monaural

system

ReeiCapacity .... Upto 10-1/2"reel

Tape Speed. . . . . . . . . . . 15,7-1/2 and 3-3/4 ips (fO.5%)

Wow & F1utter Less than 0.035% RMS at 15 ips.

Less than 0.05% RMS at 7-1/2 ips.

Less than 0.08% RMS at 3-3/4 ips. Equalization , Correct equalization für playback of

tapes recorded to NAB CUIVe.

Frequency Response. . . . 20 Hz to 30,000 Hz (f3 dB)

at 15 ips. (Akai SR T Tape)

20 Hz to 28,000 Hz (f3 dB)

at 7-1/2 ips. (Akai SRT Tape)

30 Hz to 20,000 Hz (f3 dB)

at 3-3/4 ips. (Akai SRT Tape)

20 Hz to 28,000 Hz (f3 dB)

at 15 ips.

20 Hz to 26,000 Hz (f3 dB)

at 7-1/2 ips.

30 Hz to 19,000 Hz (f3 dB)

at 3-3/4 ips.

Distortion. . . . . . . . . . . . Less than 1% (1,000 Hz "0"

Signal to Noise

Ratio. . . . . . . . . . . . . . Better than 54 dB (57 dB SRT

Tape)

Erase Ratio. . . . . . . . . . . Better than 70 dB

Cross-Talk. . . . . . . . . . . . Better than 70 dB (monaural)

Better than 45 dB (stereo)

VU)

Bias Frequency . . . . . . . . 110 kHz

ßeads (4): 2-GX combination (Recording/

Erase) heads 2-GX playback heads

Motors. . . . . . . . . . . . . . (3): AC seIVO motor für

capstan drive Two eddy current motors für

reel drive

Fast Forward &

Rewind Time. . . . . . . Within 90 sees. using a 1,200 ft.

tape at 60/50 Hz

Output Jacks . . . . . . . . . . Line (2): 1.23 V ("0" VU)/

10051(Required load impedance: more than 10 kn) Phone (1): 50mV/8 n.

Input Jack. . . . . . . . . . . . Microphone 4: 0.5 mV/4.7 kn

Line (2): 100 mV/50 kn

Din Jack 0.6 V/20 mV (high)/5 mV (low)

Semi-Conductors. . . . . . . Transistors: 93

Diodes: 87

Power Requirements . . .. 100 V to 240 V A.C., 50/60 Hz

Power Consumption 160 W max.

Dimensions. . . . . . . . . . . 457(W) x 590(H) x 240(D) rnrn

(18 x 23.2 x 9.5")

Weight. . . . . . . . . . . .. . . 31.2 kg (68.71bs)

For improvement purposes, specifications and design are subject

to change without notice.

lHJ

STANDARD ACCESSORIES ErnptyRee1 (1) ReelAdapterHub (2)

Connection Cord. . . . . . . . . .. (3-core areas: 1, others: 2)

Spare Fuses , (1 set)

Operator'sManual

(l)

Page 17

.--

TROUBLE SHOOTING CHART

The conditions listed below do not indicate mechanical failure of your unit. If your machine exhibits any of these conditions, check tor trouble as indicated.

SYMPTOM

Loss of sensitivity and tone quality.

Machine will not record or playback.

Irregularity in tape transport.

Tape will not TUn.

Previsously recorded program will not eTage.

Distorted or noisy sound.

No sound through headphones.

TROUBLE

Dirty Erase Head.

Wrong side of tape facing

the heads.

* A.C. power lower than the

voltage to which your machine is adjusted. Magnetized head.

Tape Selector Switch is set

incorrect1y.

* Check positions of controls

and inputjoutput.

* Check position of the Recording

Safety Button. Check position of the Shut-Offj

Tension Lever or Automatie StopjTension Lever

S.O.S.jEcho Selector Switch

at improper position.

* Pause Switch at ON position.

* on or magnetic particles

adhering to the Capstan or Pinch Wheel. Sticky or dirty tape surface.

Improperly loaded tape.

* A.C. power lower than the

voltage to which your machine is adjusted. Sensing foil is affixed

improperly.

* Blown fuge. * Power is not being supplied. * Twisted or sticky tape.

Erase head is dirty.

Recording level is too high.

Check external source controls

and connections.

Une Output Level Controls

at minimum.

REMEDY

See HEADS SHOULD ALWAYS

BE KEPT CLEAN.

See VOLTAGE & CYCLE

CONVERSION.

* See HEAD DEMAGNETIZING.

Check and correct.

* See PINCH WHEEL &

CAPST AN CLEANING.

See HOW TO LOAD A

MAGNETIC TAPE.

See VOLTAGE & CYCLE

CONVERSION.

See AUTOMATIC & MANUAL

REVERSE RECORDING AND PLA YBACK.

Check power cord, Power Switch,

and Shut-OffjTension Lever

or Automatie StopjTension Lever.

See HEAD SHOULD ALWA YS

BE KEPT CLEAN.

Normal recording level is

zero VU.

Set to "0" VU (5 position) and

then adjust headphone' Volume Contral.

IIID

Page 18

MEMO

I1§]

Page 19

MEMO

Page 20

MANUFACTURED & DISTRIBUTED BY

AKAI ELECTRIC CO., LTD. AKAI TRADING CO., LTD.

12-14,'2-chome, Higashi-Kojiya, Ohta-ku, Tokyo, Japan

AKAI AMERICA LTD.

2139 E. DeI Amo BIvd., Compton, Calif., 90220, U.S.A. TELEPHONE: (213) 537-3880 TELEX: 67-7494

..,

Price US $1.50

::@f~m~ju~m~:

,"""""'"

:::::~:~:~:~:~:~:~:~~j~j~j::

Printed in Japan

.....'

.....

0 N

~ CD

C <I:

.....

Page 21

Page 22