What to do if my Akai GX-635D Tape Deck machine will not record or playback?
If your Akai Tape Deck machine won't record or playback, check the tape loading and turn the Output Level Control clockwise. Also, refer to the CONTROLS section.
Why is there irregularity in tape transport on my Akai Tape Deck?
If you experience irregularities in tape transport with your Akai Tape Deck, it might be due to oil or magnetic particles adhering to the Capstan or Pinch Wheel. Refer to the HEAD BLOCK CLEANING section. Also, check if the tape is loaded improperly, and refer to the TAPE LOADING section.
What to do if previously recorded program will not erase on Akai GX-635D Tape Deck?
If the previously recorded program will not erase on your Akai Tape Deck, the erase head might be dirty. Refer to the HEAD BLOCK CLEANING section.
What to do if Akai GX-635D Tape Deck tape will not run?
If your Akai Tape Deck tape will not run, check the power cord, power switch, and automatic stop/tape tension lever, as a blown fuse could be the cause. Also verify power supply.
How to fix loss of sensitivity and tone quality on Akai GX-635D?
If you are experiencing loss of sensitivity and tone quality with your Akai Tape Deck, the Erase Head might be dirty. Refer to the HEAD BLOCK CLEANING section. Also, the Tape Selector Switch might be set incorrectly, so refer to the HEAD DEMAGNETIZING section. You can also check Reinigung von Tonköpfen, Andruckrolle und Tonwelle and Entmagnetisieren der Tonköpfe.
Explains system control logic using logic gates.
Details the IC1 M54410P circuit construction and function.
Describes the circuit to prevent click noise during timer recording.
Explains the operation of the servo motor system.
Adjusts guide roller loose play for smooth tape travel.
Adjusts tension micro switch position for proper arm lock.
Adjusts roller block height to 43mm for tape guide alignment.
Adjusts reel table height for proper tape take-up.
Adjusts capstan shaft loose play to 0.1-0.2mm.
Adjusts brake band position and tension for stop mode.
Adjusts tape speed to 7-1/2 ips and 3-3/4 ips.
Lists titles and identification numbers of all P.C. boards.
Details the composition and interconnections of P.C. boards.
Lists recommended spare parts for stocking and repairs.
Lists parts for the head block assembly.
Lists parts for the SCM-200 motor block.
Lists parts for the reel table block.
Lists parts for the roller block assembly.
Lists parts for the power supply block.
Lists parts for the mecha assembly block.
Lists parts for various printed circuit boards.
Lists parts for the amplifier assembly block.
Lists parts for the final assembly block.
Lists interchangeable semiconductor parts.
Main schematic diagram for GX-635D/DB.
Amplifier schematic diagram for GX-635D.
General| Track system | 4-track, 2-channel stereo |
|---|---|
| Total Harmonic Distortion | 0.8% |
| Outputs | 0.775V (line) |
| Type | Reel to Reel |
| Heads | 3 heads |
| Motor | 2 x reel, 1 x capstan |
| Reel size | up to 10.5 inch reel |
| Wow and flutter | 0.06% (7 1⁄2 ips) |
| Frequency response | 30Hz to 26kHz (7 1/2 ips) |
| Signal to Noise Ratio | 62dB |
| Dimensions | 440 x 440 x 240 mm (17.3 x 17.3 x 9.4 inches) |
| Output Voltage | 0.775V |
| Tape speeds | 3 3/4 ips, 7 1/2 ips |
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