Arp sequencer 1601 servicemanual
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Page 1
gARRSEQUENCER MODEL 1601
SERVICE MANUAL
W
ARP INSTRUMENTS, INC.
320 Needham Street,
Newton, MA. 02164
617 965-9700
Document Number 9001901
© September 1976, ARP INSTRUMENTS, INC.
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 EXPRESS PERMISSION OF ARP INSTRUMENTS, INC.
Page 2
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gABIiSEQUENCER MODEL 1601
SERVICE MANUAL
TABLE OF CONTENTS
1. INTRODUCTION
1.1 Product Description ........................ 2
1.2 Specifications ............................ 2
1.3 Function Description ....................... 3
2. THEORY OF OPERATION
2.1 Sequencer ............................... 4
2.2 Ouantizer ............................... 4
3. CIRCUIT DESCRIPTIONS
SEEM!
3.1 Clock On/Off ............................. 5
3.2 OneShot...............................5
33 Clock Oscillator ........................... 5
3,4 Randomizer, Skip & Reset .................... 6
3.5 Mask Circuit ....... . ..................... 6
3.6 Step ................................... 6
3.7 Foot Switch Jack .......................... 6
3.8 Counter/Latch ............................ 6
3.9 Decoder ................................ 6
3.10 Gate Output Processing ..................... 7
QUANTIZER
3.11 Current Source & Semitone Shift ............... 7
3.12 CV Generator & Scanner .................... 7
3.13 Counter ............................... 7
3.14 Comparator ............................. 7
3.15 Sample Control .......................... 7
3.16 External CV Input ........................ 7
4, SEOUENCER TEST POINTS ....................... 8,9
5. CALIBRATIONS .............................. 10,11
6. ASSEMBLY/DISASSEMBLY ....................... 11
7. BLOCK DIAGRAM .............................. 12
8. GENERAL INFORMATION (COS/MOS Integrated Circuits). . .13
9. SCHEMATICS & LAYOUTS ............. 14,15,16,17,18,19
10. PARTS LIST .................................. 22