Arp omni 1 service manual
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Page 1
@3133 OMNI Model 2480
SERVICE MANUAL
ARP INSTRUMENTS, INC.
320 Needham Street
Newton, MA 02164
(617) 965-9700
Document Number 90020000
© February, 1977
ARP INSTRUMENTS, INC.
THE INFORMATION CONTAINED HEREIN IS CONFIDENTIAL AND PROPRIETARY TO ARP INSTRUMENTS, INC. IT IS
DISCLOSED TO YOU SOLEY FOR PURPOSES OF INSTRUCTION AS TO OPERATION OF THE EQUIPMENT AND
MAINTENANCE AS APPROPRIATE IT IS'NOT TO BE USED BY YOU FOR ANV OTHER PURPOSE, NOR IS IT TO BE
DISCLOSED TO OTHERS WITHOUT THE EXPRESS PERMISSION OF ARP INSTRUMENTS, INCV
Page 2
m OMNI Model 2480
SERVICE MANUAL
TABLE OF CONTENTS
1. INTRODUCTION
1V1 Product Description ............................ 2
1.2 Specifications ................................ 2
13 Function Description .......................... 3
2' THEORY OF OPERATION ........................ 5
3, CIRCUIT DESCRIPTIONS
3.1 Upper Voicing Board ........................... 5
3.2 Lower Voicing Board ........................... 6
3.3 String Control Board ........................... 8
34 Synthesizer Control Board ....................... 9
3,5 Synthesizer Board ............................ 10
3.6 Phaser Board ............................... 10
3.7 Power Supply ............................... 11
4 ASSEMBLY/DISASSEMBLY ....................... 12
5 GENERAL INFORMATION ........................ 12
6. CALIBRATIONS ............................... 13
7, SCHEMATICS & LAYOUTS ..................... 14-33
8. PARTS LIST ............................... 34-36
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