LEM Hurricane H400S - User Manual

1
Index
Soldering point.
Male connector.
Female connector.
M/F faston connector.
Test point.
Supply voltage. Logic supply ground.
Analog supply ground.
Chassis ground.
Earth ground.
Flag joined with one or more flags
GENERALMUSIC Sales Division: 47842 S.Giovanni in Marignano (RN) ITALY - Via delle Rose, 12
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Technical data2
Passive versions3
Checking & adjustement
9
10 H350A schematics
11
H300A, H300MA schematics
12 Spare part list
H350SA, H400SA schematics
4
H100MA, H150A, H200A, H200MA schematics8
with the same signal name inscribed.
ATTENTION Observe precautions when handling electrostatic sensitive devices.
Notice
Service must be carried out by qualified personnel only. Any tampering carried out by unqualified personnel during the guarantee period
will forfeit the right to guarantee.
For a correct operation of the instrument, after having switched off, be careful to wait at least 3 seconds before switching on again.
To improve the device's specifications, the schematic diagrams may be subject to change without prior notice.
All components marked by this symbol have special safety characteristics, when replacing any of these components use only
manufacturer's specified parts.
The (μ) micro symbol of capacitance value is substituted by U.
The (
Ω) omega symbol of resistance value is substituted by E.
The electrolytic capacitors are 25Vdc rated voltage unless otherwise specified.
All resistors are 1/8W unless otherwise specified.
All switches shown in the "OFF" position. All DC voltages measured to ground with a voltmeter 20KOhm/V.
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service manual
schematic diagrams
CODE: 270306 version 1.02
Powered & passive loudspeaker systems
hurricane

Summary

General Notices and Safety

Service Personnel Qualifications

Service requires qualified personnel; unauthorized work voids the warranty.

Safety Critical Components

Components with safety symbols require manufacturer-specified replacements for continued safety.

Electrical and Component Specifications

Handling Electrostatic Discharge (ESD)

Emphasizes precautions for handling electrostatic sensitive devices.

Technical Specifications Overview

Loudspeaker Model Components

Power, Impedance, and Crossover Data

Specifies power handling, impedance, and passive crossover frequencies for all models.

Amplifier and System Performance

Outlines amplifier specifications, frequency response, sensitivity, and maximum SPL for each model.

Crossover Board Schematic Diagrams

H150 & H200 Series Crossover Schematics

H300 Series Crossover Schematics

H350 Series Crossover Schematics

H350 S;H400 S & H500 Crossover Schematics

General Precautions and Testing Procedures

Essential Safety and Setup Guidelines

Covers safety during testing, including earth insulation, capacitor discharge, and load resistors.

Visual Inspection and Test Instruments

Guidance on visual checks for damage and a list of required test instruments.

H100 MA Checking and Adjustments

Detailed steps for checking and adjusting the H100MA model's performance and power supply.

H150 A;H200 A;H200 MA Checks and Adjustments

Procedures for checking and adjusting H150A, H200A, and H200MA models.

Model-Specific Checking and Adjustments

H300 A;H300 MA Checking and Adjustments

Procedures for checking and adjusting H300A and H300MA models, including channel and limiter tests.

H350 A Checking and Adjustments

Detailed steps for checking and adjusting the H350A model's amplifier and power supply.

Advanced Checks and Troubleshooting

H350 SA;H400 SA Checks and Adjustments

Procedures for checking and adjusting H350SA and H400SA models, covering various tests.

Troubleshooting Advice and Component Checks

Provides general advice for diagnosing problems and checking transistors and diodes.

Reliability and Burn-in Testing

Schematics: H100 MA, H150 A, H200 A, H200 MA Series

Input and Amplifier Board Schematics

Schematics for the input and amplifier boards of H100MA, H150A, H200A, H200MA models.

Supply and Crossover Board Schematics

Schematics: H350 SA & H400 SA Series (Part 1)

Input & HF Amplifier Board Schematics

Schematics for the input and high-frequency amplifier boards of H350SA and H400SA models.

Xover & LF Amplifier Board Schematics

Supply Board Schematics

Schematics: H350 SA & H400 SA Series (Part 2)

Input & Xover Board Schematics

350 W Amplifier Board Schematics

Power Supply Board Schematics

Schematics: H350 SA & H400 SA Series (Part 3)

Input & Xover Board Schematics (Continued)

350 W Amplifier Assembly Schematics

Power Supply Board Schematics (Continued)

LEM Hurricane H400S Specifications

General

Configuration	2-way
Impedance	8 Ohms
Power Handling	400W RMS, 800W peak
Sensitivity	98dB
Enclosure Type	Bass Reflex
Connectors	Speakon