THORENS PC 650 - Page 14

10
Fast Rewind
The voltage pulses for the Tape Transport Stop on VM 17 are also derived at
R 1419.
When the Fast Forward command first appears, C 1405 causes somewhat less
current to be fed through T 1409 to the reel motor. Initially, therefore, the motor
runs slower until the capacitor has charged.
When the Fast Forward function is disabled, the cathodes of D 1415 and D 1420
remain at 0 until C 1407 has discharged. In this manner, a PLAY or Fast Rewind
command will initially be blocked and appears only with delay at IC 1401.
Operation proceds in a similar manner to Fast Forward. A command 1 at connec-
tion S 1422 produces a command 0 at IC 1401 (15). T 1403 and T 1408 are
turned on, causing the reel motor to run in reverse. The motor current is con-
trolled the same as for Fast Forward. However, if the MEMORY contact is closed,
C 1408 is shorted over S 1408, and the Rewind function proceeds at reduced
speed.