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Very good manual, in depth and complete. Only criticism is that some of the circuit diagrams are slightly blurry and hard to follow for long periods of time, but this is to be expected. Perfect for any maintenance required. Also contains the wiring diagrams of the control cable for constructing extensions.
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Detailed SONY CFD980 Service Manual at an easy to find one stop shopping. Make my radio hobby technically interesting. Thanks.
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13VT-N100 13VT-N150 13VT-CN10
Note: Whenever replacing the reel disk, perform the height checking and adjustment.
Master plane Reel disk height adjusting jig
Notes: 1. Hold the torque gauge by hand so that it is not moved. 2. Do not keep the reel disk in lock state. Do not allow long-time measurement.
10 ± 0.2mm
Reel disk
A
Mechanism chassis
CHECKING AND ADJUSTMENT OF TAKEUP TORQUE IN REWIND MODE
• Remove the cassette housing control assembly. • After short-circuiting TP7701 and TP7702 provided at the left on the main PWB, plug in the power cord, then turn on the power. • Setting 1. Set a torque gauge to zero on the scale. Place it on the supply reel disk. 2. Press the rewind button. 3. To calculate the remaining capacity, slowly rotate the take-up reel disk, and then shift it into the rewind mode. • Checking 1. Turn the torque gauge slowly (one rotation every 2 to 3 seconds) by hand in the CCW direction. 2. Make sure that the indication of torque gauge is not less than 30mN·m (306gf·cm).
B
Reel disk
Figure 1-7.
CHECKING AND ADJUSTMENT OF TAKEUP TORQUE IN FAST FORWARD MODE
• Remove the cassette housing control assembly. • After short-circuiting TP7701 and TP7702 provided at the left on the main PWB, plug in the power cord, then turn on the power. • Setting 1. Set a torque gauge to zero on the scale. Place it on the take-up reel disk. 2. Press the FF button. 3. To calculate the remaining capacity of the play back mode, slowly rotate the supply reel disk, and then shift it into the forward mode. • Checking 1. Turn the torque gauge slowly (one rotation every 2 to 3 seconds) by hand in the CW direction. 2. Make sure that the indication of torque gauge is not less than 30mN·m (306gf·cm).
Torque gauge
Torque gauge
30mN·m (306gf·cm) or more CCW
The gauge is held at its maximum value. (Red mark) CW
30mN·m (306gf·cm) or more
Supply reel disk
The gauge is held at its maximum value. (Red mark) Idler ass'y
Figure 1-9.
Idler ass'y
Figure 1-8. • Adjustment 1. If the FF winding-up torque is less than the specified value, clean the capstan D.D. motor pulley, drive belt, and limiter pulley with cleaning liquid, and check again. 2. If the torque is less that the set value, replace the reel belt.
• Adjustment 1. If the rewind winding-up torque is less than the specified value, clean the capstan D.D. motor pulley, drive belt, and limiter pulley with cleaning liquid, rewind again, and check the winding-up torque. 2. If the winding-up torque is still out of range, replace the drive belt.
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