Crown Audio 800CSL service manual Module Information, Module History, Output Modules, Main Modules

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Power Base-2 & 800CSL Amplifier Service Manual

Module Information

MODULE HISTORY

Since its introduction in 1986, the PB-1 has gone through a number of updates and revisions. Over the course of its history some of these changes have resulted in upgrading to newer modules. What follows is a historical breakdown of PB-1 modules. It should also be noted that the 460CSL was introduced in 1992 and therefor modules obsoleted before that time were never used in the CSL version.

OUTPUT MODULES:

Q42647-0

Original Output Module. No longer available. Q42717-1

Output Module: 12 resistor small predriver. Last out- put module for PB-2 for use with TO-220 package driver transistors.

Q42871-6

TO-3P Driver Output Module. Not for use in THC units, not retrofittable into TO-220 driver transistor units. Q42966-4

TO-3P Driver #2 Output Module. Not for use in THC units, not retrofittable into TO-220 driver transistor units. May replace this or Q42871-6 only.

Q43015-9

THC Output Module with TO-3P drivers. Not retrofittable to any older units. Does not require special main module for THC ODEP recompensation. Also im- proved bias stability.

Q43203-1

THC #2 Output Module. Replaces Q42967-2 only. Electrically identical, but larger screw head plates prevent shorting which could occur with the first THC output module.

MAIN MODULES:

Q42665-2

Original Main Module for PB-2. No longer available. Q42683-5

Main #2 for PB-2. No longer available.

Q42818-7

Third Gain Main Module. Same circuit board as the universal PC board used in MT-600/1200, MA-600/ 1200, and PB-1 (Q42776-7), except that PB-2 re- quired some unique component values. Added third gain stage and ground lift switch. Can replace all older modules. Note that if this module is being used to replace an older module, you may have to slide the ground lift switch to the left (ground lift position) and clip off the plastic switch protrusion in order for the module to properly fit in the unit.

Q43059-7

THC Main Module built on D 7993-5 circuit board. On this module the boost circuit has been deleted, the third position (1.4V) is added to the Sensitivity Switch, and additional fault circuitry has been added to the module. Although it is possible to modify any older unit to accept this module, it is recommended that the Q42818-7 be used to replace main modules in all older units, and this module be used only as a replacement for itself.

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Contents Power BASE-2& 800CSL Avis Table of Contents Scope WarrantyIntroduction 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 Chassis Front Assembly Output Assembly ONE PER ChannelBack Panel 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 Q42665-2 Main Module Original for PB-2 Q42665-2 Main Module Parts List D 6910-0 BoardNetwork Resistors 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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