SEQUENTIAL 512 PRO FX SERVICE MANUAL ocr

Sequential Circuits, Inc. PRO-FX MODULE 512 DISTORTION 3051 North First Street PRELIMINARY SERVICE DATA San]ose，CA 9513な-2093 Manual No. TN512-0 (な08) 9な6-52な0 Issued: September, 1982 TELEX: 36な412 INTR 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. U113 8255 Programmable Peripheral Interface has three bus groups, denoted PA, PB and PC. The PA bus provides swtich bits to U109 switch latch. The PB bus accepts the three switch inputs, plus a low signal from Q l l l which codes the number of pots. The PC bus outputs the switch latch strobe, pot and S/H addresses and strobes to the Vade multiplexer and Vdac demultiplexer. The Vade multiplexer sequentially samples the pots to be digitized by the ADC window com parator in the System Controller. Likewise, control voltag

Sequential Circuits, Inc. PRO-FX MODULE 512 DISTORTION 3051 North First Street PRELIMINARY SERVICE DATA San ]ose，CA 9513な-2093 Manual No. TN512-0 (な08) 9な6-52な0 Issued: September, 1982 TELEX: 36な412 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. U113 8255 Programmable Peripheral Interface has three bus groups, denoted PA, PB and PC. The PA bus provides swtich bits to U109 switch latch. The PB bus accepts the three switch inputs, plus a low signal from Q l l l which codes the number of pots. The PC bus outputs the switch latch strobe, pot and S/H addresses and strobes to the Vade multiplexer and Vdac demultiplexer. The Vade multiplexer sequentially samples the pots to be digitized by the ADC window com parator in the System Controller. Likewise, control voltages for the Distortion module VCAs and VCF originate in the System Controller DAC and are output via the Vdac demux. TN512-0 9/82 PRELIMINARY CHECK/TRIM PROCEDURE Fig. 512-1 1 . Install the Pro-FX extender card (SCI #PC500-^-l) and connect module. 2. Check…