UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Akai GX-230D not picking up on silver sense foil.

ms660 · 11th May 2019, 2:16 pm

If the reverse button works check out the sensor for muck/connections etc and make sure the foil on the tape is in good condition.

Circuit wise, the tape sensor is connected across the reverse button switch, both connect to the flip flop that controls the reverse relay and when either the switch or the sensor is operated/actuated the bias supply to the first transistor in the flip flop is connected to chassis via one of them and a diode, that in effect turns the other transistor in the flip flop hard on which in turn actuates the reverse relay, the relay coil being in series with that transistor's collector.

Lawrence.

11th May 2019, 2:16 pm	#2
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Akai GX-230D not picking up on silver sense foil. If the reverse button works check out the sensor for muck/connections etc and make sure the foil on the tape is in good condition. Circuit wise, the tape sensor is connected across the reverse button switch, both connect to the flip flop that controls the reverse relay and when either the switch or the sensor is operated/actuated the bias supply to the first transistor in the flip flop is connected to chassis via one of them and a diode, that in effect turns the other transistor in the flip flop hard on which in turn actuates the reverse relay, the relay coil being in series with that transistor's collector. Lawrence.