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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.
Perfect source for service manuals: fast and professional transaction; high quality, perfect readable and largely scaleable PDF; complete schemes, diagrams and spare part list. Tnx a lot, cu again!!!!
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This was the Sony CCU-500A Service manual I was looking for.
The price was reasonable.
The permission to download was quck.
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Excellent printing quality.
A complete and very usefull service manual with all details.
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OPTICAL PICK-UP BLOCK (DAX-22EG)
Note on Printed Wiring Boards: â¢ Y : parts extracted from the conductor side. â¢ a : Through hole. â¢ b : Pattern from the side which enables seeing. Caution: Pattern face side: (Side B) Parts face side: (Side A) Parts on the pattern face side seen from the pattern face are indicated. Parts on the parts face side seen from the parts face are indicated.
Common Note on Schematic Diagram: â¢ All capacitors are in ÂµF unless otherwise noted. pF: ÂµÂµF 50 WV or less are not indicated except for electrolytics and tantalums. â¢ All resistors are in â¦ and 1/ 4 W or less unless otherwise specified. â¢ C : panel designation. â¢ U : B+ Line. â¢ Power voltage is dc 4.5 V and fed with regulated dc power supply from external power voltage jack. â¢ Voltages and waveforms are dc with respect to ground in playback mode. no mark : CD PLAY â : Impossible to measure â¢ Voltages are taken with a VOM (Input impedance 10 Mâ¦). Voltage variations may be noted due to normal production tolerances. â¢ Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances. â¢ Circled numbers refer to waveforms. â¢ Signal path. J : CD
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Complete owner's manual in digital format. The manual will be available for download as PDF file aft…