SEQUENTIAL 514 PRO FX SERVICE MANUAL ocr

Sequential Circuits, Inc. PRO-FX MODULE 51な MIXER 3051 North First Street PRELIMINARY SERVICE DATA San 3ose, CA 9513¿f-2093 Manual No. TN5H-0 (¿fOS) 946-52 な0 Issued: September, 1982 Nijverheidsweg 11c 36^1 RP Mijdrecht T E L E X:12721 SQNTL NL SEQUENTIAL CIRCUITS, INC. All rights reserved. Printed in USA. PRELIMINARY INFORMATION All subject to change. The Mixer uses eight DACs to control audio level and pan for four channels. Attenuation data for each DAC is latched from the PA bus group of U119 Programmable Peripheral Interface. The PB bus only accepts an input coding the number of pots. The PC bus outputs the pot and DAC addresses and strobes to U118 Vade multiplexer and U117 DAC demultiplexer. The Mux sequentiaily samples the pots which are digitized by the ADC window comparator in the System Controller. U117 is actually operates as a decoder to use Vdac as the DAC select strobe. Th

•斗0KT. 1982 Sequential Circuits, Inc. PRO-FX MODULE 51な MIXER 3051 North First Street PRELIMINARY SERVICE DATA San 3ose, CA 9513¿f-2093 Manual No. TN5H-0 (¿fOS) 946-52 な0 Issued: September, 1982 TELEX: INTR Nijverheidsweg 11c 36^1 RP Mijdrecht Netherlands 02979-6211 T E L E X :12721 SQNTL NL Copyright©1982 by SEQUENTIAL CIRCUITS, INC. All rights reserved. Printed in USA. PRELIMINARY INFORMATION All subject to change. The Mixer uses eight DACs to control audio level and pan for four channels. Attenuation data for each DAC is latched from the PA bus group of U119 Programmable Peripheral Interface. The PB bus only accepts an input coding the number of pots. The PC bus outputs the pot and DAC addresses and strobes to U118 Vade multiplexer and U117 DAC demultiplexer. The Mux sequentiaily samples the pots which are digitized by the ADC window comparator in the System Controller. U117 is actually operates as a decoder to use Vdac as the DAC select strobe. The DACs can be used in pan applications because their two outputs are complementary. CHECK/TRIM PROCEDURE 1 . Adjust POT REF for 5.10V +.05/-.00V (refer to figure). 2. Put Controller in manual mode. 3. Set up signal generator for mVp-p…