Fostex A-8 - Page 16

On the other hand, Q41 is switched off by the "L" level from U5-18 in the same
way as for PLAY mode and the +24V DC applied to L2 (FAST SOL.) drops to +16 V DC.
C45 is provided to drive the intermittent solenoid when the transport is put
in either F.FWD or REWIND modes from the PLAY mode.
When the transport is put in either the F.FWD or REWIND mode, C45 is charged
through D46 or D47 during which Q39 switches on, C34 is discharged, and when C45
reaches full charge, Q39 switches off, which in turn charges C34, and the inter 
mittent solenoid drive circuit is activated as previously mentioned.
Fig. 4-5
4.6 REEL MOTOR DRIVE CIRCUIT
The left and right reel motor drive circuits are identical except for the
additional Q28 and Q29 in the takeup reel motor circuit.
Q28 and Q29 act to stop the takeup reel motor when the PLAY button is depres 
sed during the EDIT mode.
Setting the EDIT switch to IN shorts the emitter of Qll to zero volt, and if
the PLAY button is now depressed, the "L" level output of U9-17 inverted to "H" by
the inverter, switches on Qll. Switching on of Qll then switches off both Q27 and
Q28. At this point, the +24V DC flows into the base of Q29 via R140, D55 and D56 to
switch it on. This switch on of Q29 results in a short circuit across the motor
terminals, thus electrically stopping it. Except for PLAY mode during EDIT, Q28 is
always in the on state.
When the PLAY button is depressed in other than the EDIT mode, U9-17 goes to
"L" but is inverted and applied to Q21 to switch it on which in turn switches on
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