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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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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.
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Excellent printing quality.
A complete and very usefull service manual with all details.
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A+++++++++++++++++++++++++
DV-NC65H/S DV-NC70H
8-25. INSTALLING THE MASTER CAM (AT REAR SIDE OF MECHANISM CHASSIS)
1. Before installing the master cam, make sure that the sifter is at initial position. (Right side from bottom view) 2. Place the master cam by pushing in so that the long hole of the master cam comes to the front side as shown below. 3. Fix the E-ring. 4. Adjust the master cam and pinch drive cam, fix the synchro gear in correct position.
E-ring
8-26. REPLACEMENT OF LOADING MOTOR
� Removal
Apply grease *Apply grease to the tip as well. Worm gear Apply grease Leading connect gear. Apply grease Worm wheel gear. Apply grease Red Loading motor.
Push in with this long hole toward you. The sifter moves slightly to the left.
(
Wire + : Red - : White
Insert
L-M-Block.
Figure 8-40. Figure 8-39-1. Note: See the figure below for the phase matching between the master cam synchro gear and pinch drive cam. � Phase alignment of the master cam and the synchro gear; Align the wide tooth space and the composite tooth. � Phase alignment of the synchro gear and the pinch drive cam; Adjust the teeth so as to orient the rib of the synchro gear and the hole of the pinch drive cam. � Replacement Remove the loading motor, and install the replacement loading motor as shown below.
Worm gear 6.95 +0 mm - 0.15
Loading motor A part
Phase matching Rib Synchro gear Phase matching
To press the motor in, first receive it by portion A.
Pinch Drive Cam
Figure 8-41.
Hole of Pinch Drive Cam
Master Cam
The loading motor pressing-in must be less than 196N (20 kgf). Adjust the distance between motor and pulley to 6.95 +0. 2 mm.
�0.15
Figure 8-39-2. 40
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