OMNI 2 SERVICE MANUAL ocr

MODELS 2471, 2472, 2473, & 2475

SERVICE MANUAL MODELS 2471,2472, 2473, & 2475 o CONTENTS SECTION 1 INTRODUCTION..................................................1 PRODUCT DESCRIPTION SPECIFICATIONS SECTION 2 THEORY OF OPERATION................................2 FUNCTION DESCRIPTIONS SIMPLIFIED BLOCK DIAGRAM SECTION 3 CIRCUIT DESCRIPTIONS..................................2 UPPER VOICING BOARD LOWER VOICING BOARD STRING CONTROL BOARD SYNTHESIZER CONTROL BOARD SYNTHESIZER BOARD PHASER BOARD BASS VOICE CIRCUIT POWER SUPPL Y GENERAL INFORMATION SECTION 4 TRIM PROCEDURES.........................................12 INTERCONNECTION DIAGRAM & TRIM POT LOCATIONS SECTION 5 SCHEMATICS & ASSEMBLIES........................14 SECTION 6 PARTS LIST........................................................32 0 Copyright July 1978 ARP INSTRUMENTS, INC. 45 Hartwell Avenue Lexington, MA 02173 (617) 861-6000 Document Number 90026 THE INFORMATION CONTAINED HEREIN IS CONFIDENTIAL AND PROPRIETARY TO ARP INSTRUMENTS, INC. IT IS DISCLOSED TO YOU SOLELY FOR PURPOSES OF INSTRUCTION AS TO OPERATION OF THE EQUIPMENT AND MAINTENANCE AS APPROPRIATE. IT IS NOT TO BE USED BY YOU FOR ANY OTHER PURPOSE, NOR IS IT TO BE DISCLOSED TO OTHERS WITHOUT THE…