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5 BLOCK DIAGRAM ............................ 8 CIRCUIT BOARD LAYOUT ............... 10 WIRING ................................................................... 11 DISASSEMBLY PROCEDURE ............................ 12 LSI PIN DESCRIPTION .............................. 15 IC BLOCK DIAGRAM ................................... 18 CIRCUIT BOARDS ........................................ 20 TEST PROGRAM ................................. 28 ERROR MESSAGES ............................. 32 MIDI IMPLEMENTATION CHART ......................................... 33 PARTS LIST This document is printed on chlorine free (ECF) paper with soy ink. OVERALL CIRCUIT DIAGRAM GA 011589 HAMAMATSU, JAPAN 1.507K-926 Printed in Japan 2001.7 AG-Stomp IMPOR TANT NOTICE This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed that basic service procedures inherent to the industry, and more specifically Yamaha Products, are already known and understood by the users, and have therefore not been restated. WARNING : Failure to follow appropriate service and safety procedures when servicing this product may result in personal injury, destruction of expensive components and failure of the product to perform as specified. For these reasons, we advise all Yamaha product owners that all service required should be performed by an authorized Yamaha Retailer or the appointed service representative. IMPORTANT : This presentation or sale of this manual to any individual or firm does not constitute authorization certification, recognition of any applicable technical capabilities, or establish a principal-agent relationship of any form. The data provided is belived to be accurate and applicable to the unit(s) indicated on the cover. The research engineering, and service departments of Yamaha are continually striving to improve Yamaha products. Modifications are, therefore, inevitable and changes in specification are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the distributor’s Service Division. WARNING : Static discharges can destroy expensive components. Discharge any static electricity your body may have accumulated by grounding yourself to the ground bus in the unit (heavy gauge black wires connect to this bus.) IMPORTANT : Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit. WARNING: CHEMICAL CONTENT NOTICE! The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (Where applicable) components may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm. DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHAT SO EVER! Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder/flux vapor! If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food. WARNING Components having special characteristics are marked and must be replaced with parts having specification equal to those originally installed. AG-Stomp SPECIFICATIONS Digital Section • Full Digital Signal Processing • Mic Simulator: 8 Types • Feedback Reduction: 5-band • Digital Effects • Limiter • Digital Chorus, Digital Delay • Hall Reverb, Room Reverb, Plate Reverb • External Controller Function (EXP Pedal/MIDI): 8 Controllers/ Parameters • Tuner Function (Chromatic, Auto) MIDI Functions Receive: Program Change (Program Change Table can be created), Control Change, Bulk In Transmit: Program Change, Control Change, Bulk Out, Merge Out Guitar Power Supply 9V power can be supplied via a TRS phone cable to a guitar’s built-in pre-amplifier, etc. that consumes less than 10mA of power, and uses a monaural output. Controller/Switch Top Panel Push Switch x17 UP, DOWN, MANUAL, UTILITY, STORE, LIMITER, FEED BACK REDUCTION 1-5, CHORUS, DELAY, HALL, ROOM, PLATE, SHIFT Knob x15 MIC TYPE, BLEND, VOLUME, BASS, MIDDLE, TREBLE, PRESENCE, LIMITER LEVEL, FEEDBACK REDUCTION FREQ, FEEDBACK REDUCTION DEPTH, CHORUS SPEED/DELAY TIME, CHORUS DEPTH/DELAY FEED BACK, CHORUS LEVEL/DELAY LEVEL, REVERB LEVEL, OUTPUT Footswitch x4 1, 2, 3 BANK Rear Panel STAND-BY ON/OFF, MUTE, +9V SUPPLY ON/OFF Display 7 Segment LED (3 digit) x1 Push Switch LED x17 Footswitch LED x4 Connections INPUT: Standard Stereo Phone Jack OUTPUT L/MONO, R: Standard Stereo Phone Jack (TRS Bal anced) PHONES: Standard Stereo Phone Jack EXP. PEDAL: Standard Stereo Phone Jack DIGITAL OUT: COAXIAL MIDI IN, MIDI OUT: 5-pin DIN A/D Converter 20 bit D/A Converter 20 bit Sampling Frequency 44.1kHz Memory Allocations Preset: 30 User: 30 Input Level/Impedance (When using pre-amp bypass) INPUT: -17dBm/1MW Ou...