lexicon m300_sb_004电路图.pdf

3 Oak Park Bedford, MA 01730 Tel (617) 280-0300, Fax (617) 280-0499 M300 SERVICE BULLETIN #4 Please contact LEXICON CUSTOMER SERVICE with any questions. M300_004.BUL July 26, 1996 1 SUBJECT: M300 FIRMWARE RELEASE, VERSION 1.11 REFERENCE: ECO 921118-00 PURPOSE: To correct software bug which caused incorrect channel status to be transmitted when the M300 is running from internal crystal mode. This bug was not present in version 1.02. CORRECTIVE ACTION: V1.11 should be installed if customers are having difficulty recording through the digital interface to a DAT machine when the M300 is set to run from its internal crystal. Contact Lexicon Customer Service if you need this update. We will send one set of masters to be used by the distributors. NOTICE: This ECO will be canceled by the installation of version 3.xx into any M300. EQUIPMENT REQUIRED: 1 IC,ROM,27C010,M300,V1.11-2 P/N 350-09641 1 IC,ROM,27512,M300,V1.11-1 P/N 350-09642 INSTRUCTIONS: CAUTION Electrostatic Discharge (ESD) Precautions The following practices minimize possible damage to ICs resulting from electrostatic discharge or improper insertion. Keep parts in original containers until ready for use. Avoid having plastic, vinyl or styrofoam in the work area. Wear a properly installed anti-static wrist-strap. Discharge personal static before handling devices. Remove and insert boards with care. When removing boards, handle only by non-conductive surfaces and never touch open-edge connectors except at a static-free workstation.* Minimize handling of ICs. Handle each IC by its body. Do not slide ICs or boards over any surface. Insert ICs with the proper orientation, and watch for bent pins on ICs. Use anti-static containers for handling and transport. *To make a plastic-laminated workbench anti-static, wash with a solution of Lux liquid detergent, and allow to dry without rinsing. Replace ROMs with V1.11 RadioFans.CN 收音机爱 好者资料库