Akai 4000DB MK-II, 4000DS Service Manual
Specifications and Main Features
- Model: 4000DS
- Tape Speed: 7-1/2 And 3-3/4 ips
- Wow and Flutter:
- less than 0.15% RMS at 7-1/2 ips
- less than 0.20% RMS at 3-3/4 ips
- Track System: 4 track, 2 channel stereo / monaural
- Frequency Response:
- 30 to 23,000 HTz (+3 dB) At 71/2 ips
- 30 to 16,000 Hz (+3 dB) At 3-3/4 ips
- Signal to Noise Ratio: 21 Better Than 50 dB at 7-1/2 ips
- Total Harmonic Distortion:
- less than 1.0% 7-1/2 ips
- less than 2.0% 3-3/4 ips
- Cross Talk: Better than 60 dB in mono and better than 45 db in stereo
- Inputs:
- Mic Input : more than 0.8M/C at 30-Ohm
- Line Input : More than 70mV/200kOhm
- Outputs:
- Line Output : 0.775V 0d bm
- High Frequency Deviation: within 2dB
- Power Supply:
- 100V AC50HZ for JPN
- 120V AC60HZ for CSA
- 220V AC50HZ for CEE VDE
- 240V AC50Hz for BS I
- Power Consumption: 40W
- Dimensions: 407(W) x 314(H) x 196(D) mm
- Weight: 11.1 kg
Frequently Asked Questions
Q: What is the highest reel capacity of the tape for a 4000Ds?
A: Maximum up to 7 inches reel.
Q: The type of motor with which is installed on the 4000ds?
A: It uses a four poles induction motor type ssm-1.
Q: How can I change the recoding level on the 4000ds?
A: Set the monitor switch to TAPE , frequencies setting to audio oscillator, connect it to line input and finally adjust the recording level amplifier controls for the required output level.
Q: What is frequency response at a speed maximum of 7.5?
A: The frequency response is 7.5 ips 30 upto 23000hz
Q: Are 4000Ds able to record stereo type?
A: Yes, it has a 4 track recording system which is 2 channels stereo system type.
Q: How do I care for the equipment so that it works at its best?
A: Frequently and carefully examine, clean, adjust the heads, check the pinch wheel pressure, and use only quality tape for recording purposes.
Q: When do I have the wow and flutter in excess how do I monitor this?
A: Inspect, check the alignment of pinch wheel and capstan and re-adjust them if they are out of alignment as misalignment short-circuits the rotor or the motor.
Q: Does the 4000Ds allow the use of different tape speed?
A: Yes, It allows the 7.5 ips and 3.75 ips.
User Manual
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