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Musical Instrument Amplifier
134
Service manual
Acoustic 134 Service Manual
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Service manual
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Modular Construction Speeds Repairs
Specifications
Contents
General Information
Theory of Operation
Description
General Troubleshooting
Equipment Required
Preliminary Checks
Detailed Testing and Voltage Tables
Conditions
Control Locations
Acoustic Control Corporation
Parts List
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Specifications
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Modular Construction Speeds Repairs
3
General Information
4
Theory of Operation
5
Parts List
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Acoustic 150, 134 & 135 Service Manual
(note: 150B, 136 and 140 are similar;
those models used two 17-10 preamp boards
instead of one 17-10 and one 17-11)
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Summarization of Contents
150 SERIES AMPLIFIERS
MODEL DESCRIPTIONS (150 SERIES)
Describes individual models (151-155) within the 150 series amplifiers.
MODULAR CONSTRUCTION ADVANTAGES
Explains the modular design for ease of repair and maintenance.
150 SERIES AMPLIFIER SPECIFICATIONS
Lists technical specifications for the 150 series amplifiers.
130 SERIES AMPLIFIER DESCRIPTIONS
MODEL 134-GUITAR AMP DETAILS
Features and specifications for the 134 Guitar Amp.
MODEL 135-GUITAR AMP DETAILS
Features and specifications for the 135 Guitar Amp.
MODEL 136-BASS AMP DETAILS
Features and specifications for the 136 Bass Amp.
140/150 SERIES AMPLIFIER DESCRIPTIONS
MODEL 154-GUITAR AMP DETAILS
Features and specifications for the 154 Guitar Amp.
MODEL 155-GUITAR AMP DETAILS
Features and specifications for the 155 Guitar Amp.
MODEL 146-BASS AMP DETAILS
Features and specifications for the 146 Bass Amp.
MODEL 149-BASS AMP DETAILS
Features and specifications for the 149 Bass Amp.
GENERAL INFORMATION
AMPLIFIER DESCRIPTION
General description of the amplifier's design and features.
AMPLIFIER SPECIFICATIONS (GENERAL)
Technical specifications for amplifier models.
THEORY OF OPERATION
17-10 PREAMP BOARD THEORY
Technical explanation of the 17-10 preamp circuit.
17-11 PREAMP BOARD THEORY
Technical explanation of the 17-11 preamp circuit.
17-12 POWER AMP BOARD THEORY
Technical explanation of the 17-12 power amp circuit.
GENERAL TROUBLESHOOTING
TROUBLESHOOTING EQUIPMENT REQUIRED
Lists necessary tools for troubleshooting procedures.
INITIAL DIAGNOSTIC CHECKS
Initial diagnostic steps before detailed testing.
DETAILED TESTING AND VOLTAGE TABLES
Procedures and data for in-depth testing.
17-10 CARD SIGNAL LEVEL TESTS
17-11 CIRCUIT CARD SIGNAL LEVELS
Normal operating signal levels for the 17-11 circuit.
17-11 CIRCUIT CARD SIGNAL LEVELS (CONTINUED)
TREMOLO AND TONE CONTROL TESTING PROCEDURES
Testing procedures for tremolo and tone circuits.
TREMOLO OSCILLATOR WAVEFORM ANALYSIS
TREMOLO DRIVER STAGE WAVEFORMS
DC VOLTAGE MEASUREMENT REFERENCE
DC voltage readings for troubleshooting reference.
17-10 PREAMP DC VOLTAGE TABLE
17-11 PREAMP DC VOLTAGE TABLE
DC voltage table for the 17-11 preamp.
POWER MODULE (17-12) SIGNAL LEVEL TESTS
POWER OUTPUT & BANDWIDTH MEASUREMENT
Procedures for measuring power output and bandwidth.
POWER MODULE (17-12) WAVEFORMS & DC MEASUREMENTS
SCHEMATIC: 17-10 PREAMP BOARD
SCHEMATIC: 17-11 PREAMP BOARD (PART 1)
SCHEMATIC: 17-11 PREAMP BOARD (PART 2)
SCHEMATIC: VOLUME & TONE CONTROLS
Schematic for volume and tone control circuits.
SCHEMATIC: 17-11 CONTROLS & CONNECTORS
SCHEMATIC: 17-12 POWER MODULE
WIRING DIAGRAMS: 17-12 & 17-11 BOARDS
WIRING DIAGRAMS: 17-10 BOARD & CHASSIS
17-10 PREAMP BOARD COMPONENT LAYOUT
17-11 PREAMP BOARD COMPONENT LAYOUT
17-12 POWER MODULE COMPONENT LAYOUT
CHASSIS WIRING PHOTO (14-40)
CONTROL LOCATIONS OVERVIEW
FRONT PANEL CONTROL IDENTIFICATION
Visual identification of front panel controls.
REAR PANEL CONTROL IDENTIFICATION
Visual identification of rear panel controls.
TROUBLESHOOTING CHART
TROUBLESHOOTING CHART (CONTINUED)
Continues the list of common issues and solutions.
PARTS LIST FOR MODEL 150
PARTS LIST (CONTINUED)
Continues the detailed list of amplifier components.
PARTS LIST (CONTINUED)
Continues the detailed list of amplifier components.
SPECIFICATIONS SUMMARY
AMPLIFIER SPECIFICATIONS (134, 135, 150)
Detailed specs for amplifier models.
MODEL 154 SPEAKER CABINET SPECS
Specifications for the Model 154 speaker cabinet.
MODEL 152 SPEAKER CABINET SPECS
Specifications for the Model 152 speaker cabinet.
MODEL 155 SPEAKER CABINET SPECS
Specifications for the Model 155 speaker cabinet.
MODEL 134 SPEAKER CABINET SPECS
Specifications for the Model 134 speaker cabinet.
MODEL 135 SPEAKER CABINET SPECS
Specifications for the Model 135 speaker cabinet.
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