Crown Audio 800CSL service manual Introduction, Scope, Warranty

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Power Base-2 & 800CSL Amplifier Service Manual

Introduction

This manual contains service information on Crown power amplifiers. It is designed to be used in conjunc- tion with the applicable Owner's Manual. However, some important information is duplicated in this Ser- vice Manual in case the Owner's Manual is not readily available.

NOTE: THE INFORMATION IN THIS MANUAL IS INTENDED FOR USE BY AN EXPERIENCED TECHNICIAN ONLY!

SCOPE

This Service Manual includes several sections. These sections include Parts Ordering, Specifications, Volt- age Conversion, Circuit Theory, Factory Test Proce- dures, Mechanical Parts Lists, and Module Parts Lists. Schematics are attached. Note that component parts with circuit board comprise a complete module. Mod- ule part numbers are always associated with a spe- cific circuit board, although an unpopulated circuit board may be built up with different parts to create different modules. Note that Crown does not sell blank (unpopulated) circuit boards.

Each of the compact audio power amplifiers are designed for professional or commercial use. Provid- ing high power amplification from 20Hz to 20KHz with minimum distortion, they feature balanced inputs with bridged and parallel monophonic capability. Specific features vary depending on model family.

WARRANTY

Each Owner's Manual contains basic policies as re- lated to the customer. In addition it should be stated that this service documentation is meant to be used only by properly trained service personnel. Because most Crown products carry a 3 Year Full Warranty (including round trip shipping within the United States), all warranty service should be referred to the Crown Factory or Authorized Warranty Service Center. See the applicable Owner’s Manual for warranty details. To find the location of the nearest Authorized Service Center or obtain instructions for receiving Crown Fac- tory Service please contact the Crown Technical Sup- port Group (within North America) or your Crown/ Amcron Importer (outside North America).

Crown

Technical Support Group

Factory Service

Parts Department

Mailing Address:

PO Box 1000

Elkhart, IN USA 46515-1000

Shipping Address:

57620 C.R. 105

Elkhart, IN USA 46517

Phone: (219) 294-8200

Toll Free: (800) 342-6939

FAX: (219) 294-8301

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Contents Power BASE-2& 800CSL Avis Table of Contents Introduction WarrantyScope Parts Specifications PowerPerformance MechanicalVoltage Conversion BLUFeatures TheoryOverview Front END OperationError Amp Voltage TranslatorsGrounded Bridge Topology High Side HSOutput Device Emulation Protection Odep Low Side LSPositive Checkout Procedures Test 2 Output Bias AdjustmentTest 3 Odep Voltage Adjustment Standard Initial ConditionsTest 4 AC Power Draw Test 5 Common Mode RejectionTest 7 Phase Response Test 12 Output PowerTest 16 Signal to Noise Ratio Test 14 Odep LimitingTest 15 LF Protection Test 17 Turn on TransientsPost Testing Mechanical Non-Module Parts Back Panel Assembly Output Assembly ONE PER ChannelChassis Front Assembly Main Chassis Assembly Module Information Module HistoryOutput Modules Main ModulesQ42647-0 Output Module Parts List P10137-1 Board Q42717-1 Output Module Parts List P10233-8 Board Q42717-1 Output Module MT/MA #2 for PB-2Q42871-6 Output Module Parts List P10305-4 Board Q42871-6 Output Module MT/MA TO-3P Driver for PB-2/ 800CSLQ42966-4 Output Module Parts List P10305-4 Board Q42966-4 Output Module TO-3P Driver #2 for PB-2/ 800CSLQ43015-9 Output Module Parts List P10341-9 Board Q43203-1 Output Module Parts List P10397-1 Board Network Resistors Q42665-2 Main Module Parts List D 6910-0 BoardQ42665-2 Main Module Original for PB-2 Switches IC’SQ42683-5 Main Module Parts List D 6910-0 Board Q42683-5 Main Module #2 for PB-2Interconnects Zero OHMQ42818-7 Main Module Parts List D 7251-8 Board Q42818-7 Main Module 3rd Gain for PB-2/800CSLDpdt Side Header 5 PIN Q43059-7 Main Module Parts List D 7993-5 Board Jumper UPA75

800CSL specifications

Crown Audio has long been a respected name in professional audio equipment, and the 800CSL amplifiers are a testament to their unwavering commitment to quality and performance. Designed for professional sound reinforcement applications, the Crown 800CSL offers an impressive blend of power, reliability, and versatility, making it a popular choice among audio engineers and event coordinators.

At the heart of the Crown 800CSL is its robust power output. This amplifier delivers an impressive 800 watts per channel at 4 ohms, ensuring that it can drive even the most demanding speakers with ease. It features a Class D design, which not only maximizes efficiency, allowing for more power with less heat generation, but also contributes to a lightweight chassis that is easy to transport and install. This makes the 800CSL a versatile option for both permanent installations and mobile events.

One of the key technologies employed in the Crown 800CSL is its comprehensive built-in protection circuitry. This includes advanced short circuit protection, over-temperature protection, and current limiting. Such features ensure that the amplifier operates reliably in challenging conditions, reducing the risk of damage to both the amplifier and the connected speakers. The inclusion of a low-frequency filter further enhances performance, providing clean, powerful bass without distortion.

The Crown 800CSL also offers a range of connectivity options, including XLR and ΒΌ-inch inputs, making it compatible with a wide variety of audio sources. This flexibility, combined with user-friendly front panel controls, allows audio professionals to set up and adjust the system quickly and efficiently.

Additionally, the amplifier features a robust and compact design with a lightweight aluminum chassis. This not only contributes to its portability but also aids in heat dissipation, further enhancing performance during prolonged use. The included handles on the chassis make it easy to transport the unit between gigs, while its durable components ensure longevity.

In summary, the Crown Audio 800CSL stands out for its power, efficiency, and reliability. From its Class D amplification technology to its comprehensive protection features, this amplifier is designed to meet the needs of professionals in the audio industry. Whether for concerts, events, or installations, the 800CSL is poised to deliver exceptional sound quality and performance, making it a valuable addition to any audio toolkit.
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