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The AKAI 1720 model reel to reel tape recorder described in this Manual is quite an old unit - circa late 1960's. As a consequence, the description of the mechanical details - and adjustments thereof - is quite critical. The manual does this quite well. The schematics are also well presented and have detailed PCB overlays. Probably the only negative is that some half-tone detail has been lost from the original manual as it has been scanned in simple B&W.
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Excellent printing quality.
A complete and very usefull service manual with all details.
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Removing the heat sink & AMP board (See Fig.14 and 15)
Prior to performing the following procedure, remove the metal cover and the CD changer unit. 1. Remove the four screws I attaching the heat sink cover on the back of the body. Remove the heat sink cover. 2. Remove the four screws J attaching the heat sink & AMP board to the rear panel on the back of the body. 3. Remove the two screws K attaching the speaker terminal to the rear panel on the back of the body. 4. Disconnect the card wire from connector ACW1 and the harness from connector ACW2 on the AMP board. (See Fig.11) 5. After moving the heat sink upward, remove the claws. Then pull out the heat sink & AMP board inward.
Heat sink cover
Removing the tuner pack (See Fig.15 and 16)
Prior to performing the following procedure, remove the metal cover and CD changer unit. 1. Disconnect the card wire from connector CON01 on the tuner board. 2. Remove the two screws L attaching the tuner pack.
Removing the rear cover
Prior to performing the following procedure, remove the metal cover, CD changer unit, heat sink & AMP board and tuner pack. 1. Remove the fore screws M and one screw M' (Only MX-G50 J / MX-G56 C) attaching the rear panel.
Main board CON01
Optical out only MX-G50 J MX-G56 C