JBL EON15P-1/230 User Manual

Introduction and General Information
11
This manual has been prepared to assist technicians with the repair and maintenance of
the JBL EON line of portable performance systems. The procedures described in this man-
ual require advanced technical experience and equipment to perform.
WARNING
There are no user-serviceable parts inside these products
. Opening these
products or attempting to service may expose the user to electrical shock.
Refer servicing to qualified personnel.
Substitutions
Although many of the electronic components used in these products may be available from
electronic suppliers, some components are JBL replacements only. A product repaired with-
out JBL specified components may not meet the factory specifications. The product war-
ranty may be voided by a repair using unapproved JBL components.
Test Equipment
1) Audio Precision System One, or
Distortion Analyzer
Function Generator
2) 20MHz Oscilloscope
3) Desoldering Equipment
4) Digital Multimeter
5) High Power Load Bank
6) Variac
The complexity of the product under repair requires professional audio service equipment.
Do not attempt to repair this product without this equipment.
Factory Repair
In the U.S. and Canada: In the event that an EON product must be returned to the factory
for service, contact JBL Professional Service at (818) 895-3479 for return instructions. Do
not return any merchandise without prior authorization.
Outside the U.S.: Contact the JBL Professional Distributor in your area for service
information.

JBL EON15P-1/230 Specifications

General

Brand	JBL
Model	EON15P-1/230
Category	Music Equipment
Language	English

Summary

Introduction and General Information

Safety Warning

Safety warning regarding user-serviceable parts and electrical shock risk.

Transducer Repair Procedures

Cone Replacement Overview

Procedure overview stating that woofer reconing does not require enclosure disassembly.

Recone Procedure Details

Cone Assembly Installation Steps

Steps for installing the new cone assembly, ensuring proper alignment and glue application.

Rediaphragm Instructions 2418H

Rediaphragm Procedure Steps

Step-by-step instructions for performing the rediaphragm procedure on the 2418H driver.

Signal Input Assembly Troubleshooting EON Power15/15P-1/230

Initial Setup and Main Test Loop

Amplifier Signal Path Testing

Power Supply and LED Tests

Verification of power supply levels and functionality of 'Mic' LED indicator.

Line Amp Gain and Response Tests

Amplifier Chain Confirmation EON Power15/15P-1/230

Power and Supply Fault Diagnosis

Excessive Line Power Test

Diagnosing excessive power draw from the AC line and checking component shorts.

Supply Voltage Tests

Testing various power supply voltages (+/- 15V, +/- 39V) for correct levels and stability.

Supply and Muting Functionality

+/- 77V Supply Test

Testing the +/- 77V power supply for correct values and stability.

Low Frequency Power Amplifier Tests

Distortion and Bias Reference Testing

Second Harmonic Distortion Analysis

Voltage Amplifier Stage Testing

Voltage Amp and Front End Tests

Filter Response Testing

Low Frequency Filter Test

Testing the low frequency filter response against specified parameters.

High Frequency Power Amplifier Tests

High Frequency Power Amp Test

Testing the high frequency power amplifier for excessive power draw and output issues.

Diagnosing Performance Issues

Filter Response Testing (High Frequency)

High Frequency Filter Test

Testing the high frequency filter response against specified parameters.

Signal Input Assembly Troubleshooting EON PowerSub

Initial Setup and Power Supply Test

Gain and Signal Path Tests

PowerSub Amplifier Chain and Power Tests

Low Frequency Chain Confirmation

Verifying the correct operation of the low frequency amplifier chain.

Amplifier Muting and Power Amp Tests

Amplifier Muting Test

Power Amp Test Procedures

Testing the power amplifier for excessive power draw, output issues, and no output.

Distortion and Bias Reference Tests

Crossover Distortion Analysis

Bias Reference Test

Testing and adjusting the bias reference circuit for proper transistor biasing.

Signal Input Assembly Troubleshooting EON Power10

Power Supply and Line Amp Gain Tests

Frequency Response and Mic Gain Tests

Amplifier Performance and Chain Tests EON Power10

Mic Amp Tests and Indicators

Amplifier Setup and Low Frequency Chain Test

Power Supply and Line Tests EON Power10

High Frequency Chain Confirmation

Verifying the correct operation of the high frequency amplifier chain.

Excessive Power and Supply Tests

Amplifier Muting and Power Amp Tests EON Power10

+/- 31V Supply Test

Amplifier Muting and Power Amp Tests

Input Assembly Troubleshooting EON 15PAK

Power Supply and Gain Tests

Channel Gain Tests