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Akai CS-MO1A

Akai CS-MO1A
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Akai CS-MO1A Specifications

General IconGeneral
Track System4-track, 2-channel stereo
Tape Speed4.76 cm/s
Total Harmonic Distortion1.0%
MotorDC servo motor
Tape TypeCrO2
Frequency Response30 Hz - 16 kHz (Metal tape)
Signal to Noise Ratio58dB (dolby B)

Summary

Technical Data

Track System

Specifies the track and channel configuration.

Tape

Details the type of tape used.

Tape Speed

Indicates the tape speed in cm/s and ips.

Heads

Lists the types of heads used for recording/playback.

Motor

Describes the type of motor and its control.

Wow & Flutter

Specifies the acceptable limits for wow and flutter.

Tape Winding Time

States the time to wind a C-60 cassette.

Frequency Response

Outlines the frequency response for different tape types.

Signal to Noise Ratio

Details the signal-to-noise ratio for tape types.

Harmonic Distortion

Lists distortion levels for different tape types.

Input

Specifies input levels, impedances, and microphone impedance.

Output

Details output levels and load impedance.

DIN

Provides DIN standard input/output specifications.

Dimensions

Lists the physical dimensions of the unit.

Weight

States the unit's weight.

Power Requirements

Lists voltage and frequency requirements for different regions.

Power Consumption

Indicates power consumption in Watts.

Amplifier Adjustment

Playback Level

Adjustment for playback output level.

VU Meter Sensitivity

Calibration of VU meter response.

Bias Oscillation Frequency Adjustment

Setting the bias oscillator frequency.

Rec Peaking Adjustment

Adjusting recording peaking response.

Normal Position Frequency Response

Setting frequency response for Normal tape.

CrO2 Position Frequency Response

Setting frequency response for CrO2 tape.

Metal Position Frequency Response

Setting frequency response for Metal tape.

Recording Level

Adjusting the recording input level.

Distortion Factor Confirmation

Verifying distortion levels after adjustments.

Bias Filter

Adjustment for the bias filter circuit.

19 kHz Filter Adjustment

Tuning the 19 kHz filter.

DC Resistance of Various Heads

RECPB Head

DC resistance of the record/playback head.

Erase Head

DC resistance of the erase head.

Composition of Various P.C Boards

PRE AMP P.C BOARD CE-5501 A

Components on the pre-amp board.

REC LED P.C BOARD CE-5301 B

Components on the REC LED board.

DOLBY LED P.C BOARD CE-5301 C

Components on the Dolby LED board.

VOLUME P.C BOARD CE-5501 D

Components on the volume control board.

LAMP P.C BOARD CE-1078

Components on the lamp board.

Parts List

Head Block

List of parts for the head block assembly.

Mecha Block

List of parts for the mecha block assembly.

Pre Amp P.C Board (CE-5501 A) Block

List of parts for the pre-amp board.

Front Panel Block

List of parts for the front panel.

Final Assembly Block

List of parts for the final assembly.

Schematic Diagram

CS-M01 A

Overall schematic diagram for CS-M01A.

Dismantling of Unit

Step 1

First step in dismantling the unit.

Step 2

Second step in dismantling the unit.

Step 3

Third step in dismantling the unit.

Step 4

Fourth step in dismantling the unit.

Step 5

Fifth step in dismantling the unit.

Step 6

Sixth step in dismantling the unit.

Step 7

Seventh step in dismantling the unit.

Controls

1. Power Switch

The main power on/off switch.

2. Cassette Receptacle

Slot for inserting cassette tapes.

3. Timer Start Switch

Switch for timer-based operation.

4. Index Counter and Reset Button

Controls for the tape counter and reset function.

5. VU Meters

Displays audio levels during recording/playback.

6. Recording Indicator Lamp

Light indicating recording status.

7. LeftRight Recording Level Controls

Adjusts recording levels for left and right channels.

8. Microphone Jacks (left and right)

Inputs for connecting microphones.

9. Dolby NR Switch and MPX Filter

Controls for Dolby noise reduction and MPX filter.

10. Tape Selector

Selects tape type (Normal, CrO2, Metal).

11. Headphone Jack

Output for connecting headphones.

12. Operating Keys

Keys for playback, stop, fast forward, etc.

13. Line Output Jacks (left and right)

Audio outputs for connecting to amplifiers.

14. DIN Jack

DIN standard audio input/output connector.

15. Line Input Jacks (left and right)

Audio inputs for connecting external sources.

16. Input Selector Switch

Selects the audio input source.

Principal Parts Location

Fig. 2 Front View

Identifies major components visible from the front.

Fig. 3 Top View

Identifies major components visible from the top.

Voltage and Cycle Conversion

1. Voltage Conversion

Procedure for changing the unit's voltage setting.

2. Cycle Conversion

Information on cycle conversion (not applicable for DC motor).

Timer Start Switch Operation

Operation Description

Detailed explanation of timer start switch functionality.

Auto Stop Mechanism Operation

How Each Part Operates

Explanation of how auto-stop mechanism parts function.

Auto Stop Mechanism Operation (Continuation)

Operation Details

Detailed breakdown of auto-stop operation during playback.

Mechanism Adjustment

1. Mute Leaf Switch Installation Position Adjustment

Adjusting the mute leaf switch position.

2. Flywheel Loose Play Adjustment

Adjusting the flywheel's free play.

Mechanism Adjustment (Continuation)

3. Pinch Roller Pressure Measurement

Measuring the pinch roller pressure.

4. Winding Torque Measurement in Each Mode

Measuring winding torque for different modes.

5. Tape Speed Adjustment

Adjusting the tape transport speed.

Head Adjustment

1. RecordingPlayback Head Azimuth Alignment

Aligning the azimuth of the record/playback head.

Amplifier Adjustment

Playback Level

Adjusting playback output level on the pre-amp board.

VU Meter Sensitivity

Adjusting VU meter sensitivity on the pre-amp board.

Bias Oscillation Frequency Adjustment

Setting bias oscillator frequency on the pre-amp board.

Rec Peaking Adjustment

Adjusting recording peaking on the pre-amp board.

Frequency Response

Adjusting frequency response on the pre-amp board.

Amplifier Adjustment (Continuation)

Instrument Connection

Diagram showing instrument connections for adjustments.

Rec Peaking Adjustment

Specific setup for record peaking adjustment.

Amplifier Adjustment (Continuation)

Playback Level

Adjustment for playback output level.

VU Meter Sensitivity

Calibration of VU meter response.

Bias Oscillation Frequency Adjustment

Setting the bias oscillator frequency.

Rec Peaking adjustment

Adjusting recording peaking response.

Normal Position Frequency Response

Setting frequency response for Normal tape.

CrO2, FeCr Each position Frequency Response Confirmation

Verifying frequency response for CrO2/FeCr tapes.

Recording Level

Adjusting the recording input level.

Distortion Factor Confirmation

Verifying distortion levels after adjustments.

19 kHz Filter adjustment

Tuning the 19 kHz filter.

DC Resistance of Heads

RECPB Head

DC resistance of the record/playback head.

Erase Head

DC resistance of the erase head.

Classification of Various P.C Boards

1. P.C Board Titles and Identification P.C Boards

List of PC board titles and their numbers.

Classification of Various P.C Boards (Continuation)

2. Composition of Various P.C Boards

Details components on various PC boards.

Classification of Various P.C Boards (Continuation)

2) Power Switch P.C Board (B) CE-5303 (UT)

Schematic for Power Switch PC Board (B).

3) Power Switch P.C Board (A) CE-5302 (CSA, AAL)

Schematic for Power Switch PC Board (A).

Classification of Various P.C Boards (Continuation)

4) Power Switch P.C Board (C) CE-5304 (CEE, UK, SAA)

Schematic for Power Switch PC Board (C).

Recommended Spare Parts List

BA323894

Pre Amp P.C Board Comp. CS-M01 (JPN).

BA323893

Pre Amp P.C Board Comp. CS-M01 (U/T).

BA320995

Pre Amp P.C Board Comp. CS-MOI (AAL).

BA320996

Pre Amp P.C Board Comp. CS-M01 (CSA).

BH323920

Head BLK CS-M01.

BL319692

Pinch Roller BLK GX-M10.

BM319691

Motor BLK GX-M10.

BR321539

Supply Reel Table BLK.

BR321540

Take-up Reel Table BLK.

BT323939

Power Trans. CET-31.

BT323940

Power Trans. CET-32.

BT323941

Power Trans. CET-33.

BT323942

Power Trans. CET-34.

BT324373

Power Trans. CET-35.

BT323944

Power Trans. CET-36.

ED308952

Germanium Diode 1K34A-LR.

ED320469

LED SEL-1120R.

ED325330

LED SEL-1320G.

ED323979

Silicon Diode W03B.

ED624903

Silicon Diode 1S2473.

ED560913

Silicon Diode 1S2473 VE.

ED313846

Zener Diode HZ16-3.

EF310229

Fuse 1A 125V.

EF309387

Fuse 1A 250V.

EF623103

Fuse (Semko T) 1AT.

E1605013

IC NE545B.

EJ308985

DIN, Pin Jack 4P.

EJ316156

Head Phone Jack HLJ0315-01-020.

EJ321328

Jack HLJ0345-01-010.

EJ308986

Pin Jack 4P.

EL323981

Lamp (Fuse Type) 8V 55MA.

EM323852

VU Meter KL-270U-1.

EM323854

VU Meter KL-270U-2.

E0310608

Ferri Inductor FE-001 3.3ΜΗ.

E0325354

OSC Coil OSM-003.

E0310875

Trap Coil 7AAP-0316.

ER309119

Dolby Filter D07-001.

ER319455

Fuse/R. F 1/4W 10 ohms (G).

ER319510

Fuse/R. 1/4W 56 ohms (J).

ES315159

Push SW. SDGIP (JPN).

Recommended Spare Parts List (Continued)

ES310839

Push SW. SDG1P-E 5A/80A 250V.

ES301747

Leaf SW. BSW-1F TX-2.

ES283173

Leaf SW. BUW-31PLC.

ES321274

Lever SW. 63349.

ES315748

Lever SW. 83157.

ES283072

Slide SW. SSC22LP.

ES310591

Slide SW. 122074.

ET304169

FET 2SK68 (L) (M).

ET603257

Transistor 2SC1312S (G) (H).

ET241334

Transistor 2SC1384 (Q).

ET399846

Transistor 2SC945L (Q).

ET639437

Transistor 2SC945L (Q) (P).

ET307349

Transistor 2SD794 (P) (Q).

EV325331

Double-Axial 2-Throw/vol. DM80R 50kAx2.

EV314968

Semi-Fixed/Vol. D10 Axial 100kB.

EV315412

Semi-Fixed/Vol. D8 Axial 5kB.

EV315413

Semi-Fixed/Vol. D8 Axial 50kB.

EV315416

Semi-Fixed/Vol. D8 Axial 10kB.

EW306427

AC Cord (JPN).

EW306428

AC Cord (U/T).

EW313884

AC Cord BASEC.

EW305691

AC Cord CUL.

EW313882

AC Cord EC.

EW313883

AC Cord SAA.

HE323856

Erase Head E-621.

HP323857

REC/PB Head RP-2442.

MB321391

AS Belt.

MB321389

Capstan Belt.

MB296458

Counter Belt.

MC321559

Counter MP390-384.

MC321560

Counter MP390-385.

M1319709

Flywheel Part GX-M10.

ML319693

AS Arm Assy.

Head Block

Head Block

List of parts for the head block assembly.

Pinch Roller Block

Parts list for the pinch roller block.

Mecha Block

Parts list for the mecha block.

Mecha Block (1)

Motor Block

Parts list for the motor block.

Mecha Block

Parts list for the mecha block assembly.

Mecha Block (2)

4-1

Chassis Part GX-M10.

4-2

Coil Spring T1-3.2/0.2-16.0.

4-3

Stop Spring.

4-4

Coil Spring T1-3.2/0.29-11.2.

4-5

Coil Spring T2-3.2/0.29-11.2.

4-6

Pause Spring.

4-7

Lock Cam.

4-8

Button Lock Spring (B).

4-9

Cap.

4-10

Supply Reel Table BLK.

4-11

Washer (Polyslider) D2.1×4×0.13t.

4-12

BT Washer.

4-13

BT Spring.

4-14

Reel Cap.

4-15

Take-up Reel Table BLK.

4-16

Release Lever.

4-17

Clip (CS Type) CSTW-2.

4-18

AS Arm Assy.

4-19

Washer (Polyslider) D2.1×4×0.25t.

4-20

Push Washer.

4-21

Steel Ball D3.

4-22

Hold Spring.

4-23

Special Tapping Screw, Pan 3x6.

4-24

'E' Ring 3M.

4-25

Timer Spring.

4-26

Counter MP390-384.

4-27 x

Counter MP390-385 (BL).

4-28

Screw, Countersunk 3×6.

4-29

Counter Beit.

4-30

P-Tight Screw, BR 3x8.

4-31

Leaf SW. BUW-31PLC.

4-32 x

B-Tight Screw, Pan 2x6.

4-33

Lamp (Fuse Type) 8V 55mA.

4-34

Key Board Knob (A).

4-35 x

Key Board Knob (A-BL).

4-36

Key Board Knob (D).

4-37 x

Key Board Knob (D-BL).

4-38

Key Board Knob (B).

4-39 x

Key Board Knob (B-BL).

4-40

Key Board Knob (C).

4-41 x

Key Board Knob (C-BL).

4-42

Key Board Spring (A).

4-43

Key Board Spring (B).

4-44

'E' Ring 4M.

4-45

Relay Lever Spring.

4-46

Cassette Holder.

4-47

Brake Shoe.

4-48

Brake Spring.

4-49

Coil Spring T2-3.2/0.29-14.

4-50

Washer (Polyslider) D6.2×13×0.25t.

4-51

Middle Gear BLK.

4-52

Gear Return Spring.

4-53

Washer (Polyslider) D3.1×8×0.25t.

4-54

Retaining Ring CS Type 3.

4-55

Take-up Idler BLK.

4-56

Coil Spring T1-3.2/0.2-8.0.

4-57

Key Board Cam.

4-58

PB Cam.

4-59

Coil Spring T2-3.2/0.2-10.0.

4-60

Key Board Cam Spring.

4-61

Worm Gear Part GX-M10.

4-62

Washer (Polyslider) D2.1×4×0.5t.

4-63

Warm Pulley.

4-64

AS Belt.

4-65

Coil Spring T2-3.2/0.2-12.5.

Pre Amp P.C Board (CE-5301 A) Block

5-1 BA323893

Pre Amp P.C Board Comp. CS-M01 (U/T).

5-2 BA323894

Pre Amp P.C Board Comp. CS-M01 (JPN).

5-3 BA320996

Pre Amp P.C Board Comp. CS-M01 (CSA).

5-4 BA320995

Pre Amp P.C Board Comp. CS-M01 (AAL).

5-IC1 E1605013

IC NE545B.

5-TR1,2 ET603257

Transistor 2SC1312S(G)(H).

5-TR3 ET399846

Transistor 2SC945L(Q).

5-TR4 to6 ET639437

Transistor 2SC945L(Q) (P).

5-TR7 ET304169

FET 2SK68(L)(M).

5-TR8 ET241334

Transistor 2SC1384(Q).

5-TR9 ET639437

Transistor 2SC945L(Q)(P).

5-TR10 ET307349

Transistor 2SD794(P)(Q).

5-TR12 ET307349

Transistor 2SD794(P)(Q).

5-D1 to 3 ED308952

Germanium Diode 1 K34-LR.

5-D4 ED624903

Silicon Diode 1S2473.

5-D5,6 ED323979

Silicon Diode W03B.

5-D8 ED313846

Zener Diode HZ16-3.

5-D9 ED560913

Silicon Diode 1S2473 VE.

5-SW1 ES310591

Slide SW. 122074.

5-SW2 ES321274

Lever SW. 63349.

5-SW3 ES315748

Lever SW. 83157.

5-SW4 ES283072

Slide SW. SSC22LP.

5-VR1 EV315413

Semi-Fixed/Vol. D8 Axial 50kB.

5-VR2 EV315412

Semi-Fixed/Vol. D8 Axial 5kB.

5-VR3 EV315416

Semi-Fixed/Vol. D8 Axial 10kB.

5-VR4 EV314968

Semi-Fixed/Vol. D10 100kB.

5-VL1 EO310608

Ferri Inductor FE-001 3.3MH.

5-T1 EO325354

OSC Coil OSM-003.

5-FL1 ER309119

Dolby Filter D07-001.

5-FL2,3 EO310875

Trap Coil 7A AP-0316.

5-J1 EJ321328

Jack HLJ0345-01-010.

5-J2 EJ316156

Head Phone Jack HLJ0315-01-020.

5-J3 EJ308985

DIN, Pin Jack 4P.

5-J3 EJ308986

Pin Jack 4P (JPN, AAL).

5-FR1,2 ER319510

Fuse/R. 1/4W 56 ohms(J).

5-FR3 ER319455

Fuse/R. F 1/4W 10 ohms (G).

5-R70 ER325353

Metal Oxide Film/R. 2W 15 ohms(J).

5-C3 EC306987

Styrol/C. 470PF(J) 50WV.

5-C10 EC309416

Styrol/C. 200PF(J) 50WV.

5-C53 EC321349

Polypropylene/C. 0.0022µF(J) 630WV.

5-C67 EC565830

Styrol/C. (Vert.) 200PF(J) 50WV.

5-5 ZW263946

Nylon Rivet 4x5.

5-6 ZS421806

Screw, Pan 3x8.

5-7 ZW273756

Nut, #1 M3.

Assembly Block

Power SW. P.C Board (A) Block

Parts for Power Switch PC Board (A).

Power SW. P.C Board (B) Block

Parts for Power Switch PC Board (B).

Power SW. P.C Board (C) Block

Parts for Power Switch PC Board (C).

Connector Base Block

Parts for the connector base block.

Amp Chassis Block

Parts for the amplifier chassis block.

Final Assembly Block

Front Panel Block

Parts list for the front panel block.

Final Assembly Block

Parts list for the final assembly block.

Schematic Diagram

1. Schematic Diagram of IC

Schematic diagram for integrated circuits.

2. CS-M01 No. 1600416 A Schematic Diagram

Overall schematic diagram for the CS-M01.

Schematic Diagram (Continuation)

NE545 B

Detailed schematic of the NE545B IC.

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