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Power Base-2 & 800CSL Amplifier Service Manual
POWER AMPLIFIER
SERVICE MANUAL
POWER BASE-2
®
& 800CSL
™
©1995 by CROWN INTERNATIONAL, INC.
Mailing Address:
Shipping Address:
P.O. Box 1000
57620 C.R. 105
Elkhart, IN U.S.A. 46515-1000
Elkhart, IN U.S.A. 46517
CSL
™
is a trademark and Power Base-2,
®
ODEP,
®
and Crown
®
are registered trademarks of Crown International, Inc.
K-SVCPB2
1-95
1
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Table of Contents
Related Manuals for Crown 800CSL
Summary of Contents for Crown 800CSL
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Page 1: Power Amplifier
Power Base-2 & 800CSL Amplifier Service Manual POWER AMPLIFIER SERVICE MANUAL POWER BASE-2 ® & 800CSL ™ ©1995 by CROWN INTERNATIONAL, INC. Mailing Address: Shipping Address: P.O. Box 1000 57620 C.R. 105 Elkhart, IN U.S.A. 46515-1000 Elkhart, IN U.S.A. 46517 ™... - Page 2 Power Base-2 & 800CSL Amplifier Service Manual The information furnished in this manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible situation which may arise during installation, operation or maintenance.
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Page 3: Table Of Contents
Power Base-2 & 800CSL Amplifier Service Manual Table of Contents Introduction ... 4 Scope ... 4 Warranty ... 4 Parts ... 5 Specifications ... 6 Voltage Conversion ... 7 Circuit Theory ... 8 Test Procedures ... 13 Mechanical Parts Listing ... 17 Module Information ... -
Page 4: Introduction
Power Base-2 & 800CSL Amplifier Service Manual 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. -
Page 5: Parts
Power Base-2 & 800CSL Amplifier Service Manual GENERAL INFORMATION Later sections include both mechanical and electrical parts lists for this product. The parts listed are current as of the date printed. Crown reserves the right to modify and improve its products for the benefit of its customers. -
Page 6: Specifications
Power Base-2 & 800CSL Amplifier Service Manual Unless noted otherwise, all specifications are based on driving an 8 ohm load per channel, both channels driven, the sensitivity switch in the 26dB position, the AC supply is 120VAC at 60Hz. Crown specifications are guaranteed through the warranty period (normally 3 years). -
Page 7: Voltage Conversion
F100, fanformer, and power cord refer to voltage- parts cross-reference. Specific parts are required for the PB-2/800CSL in order to be used at different international line volt- ages. Refer also to Mechanical Parts Lists. 100 to 120V AC Mains: 20A Fuse 0.5A Low Voltage Supply Fuse... -
Page 8: Front End Operation
Power Base-2 & 800CSL Amplifier Service Manual OVERVIEW It should be noted from the outset that the PB-1 and 460CSL amplifiers are electrically and mechanically identical products. The only differences, from a ser- vice perspective, are cosmetic. For the purposes of servicing the products, it should also be known that the CSL version has been on the market since 1992. -
Page 9: Voltage Amplification
Power Base-2 & 800CSL Amplifier Service Manual tivity is achieved by controlling the ratio of feedback to input resistance. The Sensitivity Switch sets the input impedance to this stage and varies the gain such that the overall amplifier gain is 26 dB, or is adjusted appropriately for 0.775V or 1.4V input to attain rated... -
Page 10: Grounded Bridge Topology
Power Base-2 & 800CSL Amplifier Service Manual allows the NFb loop to control Error Amp gain by feeding back to its non-inverting input (with its polarity opposite to the output of the VGS). With the added voltage swing provided by the LVAs, the signal then gains current amplification through the Darlington emitter-follower output stage. - Page 11 Power Base-2 & 800CSL Amplifier Service Manual the positive half, and about .5V across the bias resistor in the negative half. Q18 conduction (and thus bias) is adjustable. A diode string prevents excessive charge build up within the high conduction output devices when off.
- Page 12 Power Base-2 & 800CSL Amplifier Service Manual ±ODEP circuitry is used to simulate the thermal barri- ers between the interior of the output device die (immeasurable by normal means) and the time delay from heat generation at the die until heat dissipates to the thermal sensor.
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Page 13: Checkout Procedures
Power Base-2 & 800CSL Amplifier Service Manual GENERAL INFORMATION The following test procedures are to be used to verify operation of this amplifier. DO NOT connect a load or inject a signal unless directed to do so by the proce- dure. - Page 14 Power Base-2 & 800CSL Amplifier Service Manual TEST 4: AC POWER DRAW Spec: 90 Watts maximum quiescent. Initial Conditions: Controls per standard. Procedure: With no input signal and no load, measure AC line wattage draw. If current draw is excessive, check for high AC line voltage or high bias voltage.
- Page 15 Power Base-2 & 800CSL Amplifier Service Manual Procedure Capacitive: Load each channel to 8 ohms in parallel with 2 µF. Inject a 20 kHz sine wave with 30 VAC output for 10 seconds. Procedure Inductive: Load each channel to 8 ohms in parallel with 159 µHenries.
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Page 16: Post Testing
Power Base-2 & 800CSL Amplifier Service Manual Checkout Procedures POST TESTING After completion of testing, if all tests are satisfactory, the amplifier controls should be returned to the posi- tions required by customer. If conditions are unknown or unspecified, factory settings are as follows: Level Controls: 9 to 11 O’Clock. -
Page 17: Mechanical (Non-Module) Parts
Power Base-2 & 800CSL Amplifier Service Manual Mechanical (Non-Module) Parts SUPPLIMENTAL ITEMS ITEM D 4137-2 Nylon Thumbscrew Washer C 3342-0 Feet, Black Self-Stick A10087-71012 10-32 .75 Machine (Rack Screw) 120VAC/60HZ NORTH AMERICA PRODUCT ONLY ITEM A10089-10832 Screw, 8-32 2.0 Ph Machine... -
Page 18: Back Panel Assembly
Power Base-2 & 800CSL Amplifier Service Manual Mechanical (Non-Module) Parts OUTPUT ASSEMBLY (ONE PER CHANNEL) ITEM A10100-4 Washer, #6 Flat Zinc A10315-1 Screw, 6-32-.56 Hex Washer Head C 4751-1 NPN Output Device C 5826-0 S100/S200 Thermal Sense LM334Z C 6492-0... -
Page 19: Main Chassis Assembly
Power Base-2 & 800CSL Amplifier Service Manual Mechanical (Non-Module) Parts MAIN CHASSIS ASSEMBLY ITEM A10086-70806 Screw, 8-32-.37 Mach Rd Ph A10094-3 Washer, #6 Black Star A10094-6 Washer, #8 Black Star A10094-8 Washer, #10 Tooth Lock A10099-5 Washer, #8 Nylon Shoulder A10109-10822 Screw, 8-18-1.375 Pan Ph... -
Page 20: Module Information
Power Base-2 & 800CSL Amplifier Service Manual 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. -
Page 21: Q42647-0 Output Module (Mt/Ma)
Power Base-2 & 800CSL Amplifier Service Manual Q42647-0 Output Module Parts List (P10137-1 Board) Q42647-0 Output Module (MT/MA Original) for PB-2: CAPACITORS C 3978-1 .047µF C 6804-6 .1µF C 6804-6 .1µF C 3996-3 .0047µF C 6807-9 .001µF C 6806-1 .01µF C 6807-9 .001µF... -
Page 22: Q42717-1 Output Module (Mt/Ma #2)
Power Base-2 & 800CSL Amplifier Service Manual Q42717-1 Output Module Parts List (P10233-8 Board) Q42717-1 Output Module (MT/MA #2) for PB-2: CAPACITORS C 3978-1 .047µF C 3218-2 .22µF C 3218-2 .22µF C 8534-7 .0047µF C 6807-9 .001µF C 6806-1 .01µF C 6807-9 .001µF... -
Page 23: Q42871-6 Output Module (To-3P Mt/Ma)
Power Base-2 & 800CSL Amplifier Service Manual Q42871-6 Output Module Parts List (P10305-4 Board) Q42871-6 Output Module (MT/MA TO-3P Driver) for PB-2/ 800CSL: CAPACITORS C 8511-5 .047µF C 7964-7 .22µF C 7964-7 .22µF C 8534-7 .0047µF C 8534-7 .0047µF C 6806-1 .01µF... -
Page 24: Q42966-4 Output Module (To-3P #2)
Power Base-2 & 800CSL Amplifier Service Manual Q42966-4 Output Module Parts List (P10305-4 Board) Q42966-4 Output Module (TO-3P Driver #2) for PB-2/ 800CSL: CAPACITORS C 8511-5 .047µF C 7964-7 .22µF C 7964-7 .22µF C 8534-7 .0047µF C 6807-9 .001µF C 6806-1 .01µF... -
Page 25: Q43015-9 Output Module (Thc)
Power Base-2 & 800CSL Amplifier Service Manual Q43015-9 Output Module Parts List (P10341-9 Board) Q43015-9 Output Module for Through Hole Chassis (THC) PB-2/800CSL units: CAPACITORS C 8511-5 .047µF C 7964-7 .22µF C 7964-7 .22µF C 8534-7 .0047µF C 8534-7 .0047µF C 6806-1 .01µF... -
Page 26: Q43203-1 Output Module (Thc #2)
Power Base-2 & 800CSL Amplifier Service Manual Q43203-1 Output Module Parts List (P10397-1 Board) Q43203-1 Output Module (THC #2) for PB-2/800CSL Units: CAPACITORS C 8511-5 .047µF C 7964-7 .22µF C 7964-7 .22µF C 8534-7 .0047µF C 8534-7 .0047µF C 6806-1 .01µF... -
Page 27: Q42665-2 Main Module (Original)
Power Base-2 & 800CSL Amplifier Service Manual Q42665-2 Main Module Parts List (D 6910-0 Board) Q42665-2 Main Module (Original) for PB-2: CAPACITORS C 4303-1 1000uF C 3913-8 470uF C 4303-1 1000uF C 6802-0 .47uF C100 C200 C 5311-3 22uF C101... - Page 28 Power Base-2 & 800CSL Amplifier Service Manual Q42665-2 Main Module Parts List (D 6910-0 Board) R111 R211 A10266-1231 R112 R212 A10266-5131 R113 R213 A10266-4721 4.7K R114 R214 A10266-4721 4.7K R115 R215 A10266-5141 510K R116 R216 A10266-3351 3.3M R117 R217 A10266-4731...
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Page 29: Q42683-5 Main Module (#2)
Power Base-2 & 800CSL Amplifier Service Manual Q42683-5 Main Module Parts List (D 6910-0 Board) Q42683-5 Main Module (#2) for PB-2: CAPACITORS C 3913-8 470uF C 3913-8 470uF C 4303-1 1000uF C 6802-0 .47uF C100 C200 C 5311-3 22uF C101... - Page 30 Power Base-2 & 800CSL Amplifier Service Manual Q42683-5 Main Module Parts List (D 6910-0 Board) R100 R200 C 7409-3 5K POT R101 R201 A10265-49911 4.99K R102 R202 A10266-1021 R103 R203 A10265-10031 100K 1% R104 R204 A10266-2721 2.7K R105 R205 A10266-2721 2.7K...
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Page 31: Q42818-3 Main Module (3Rd Gain)
Power Base-2 & 800CSL Amplifier Service Manual Q42818-7 Main Module Parts List (D 7251-8 Board) Q42818-7 Main Module (3rd Gain) for PB-2/800CSL: CAPACITORS C 3913-8 470uF C 3913-8 470uF C 6802-0 .47uF C 6806-1 .01uF C 6806-1 .01uF C 6094-9... - Page 32 Power Base-2 & 800CSL Amplifier Service Manual Q42818-7 Main Module Parts List (D 7251-8 Board) Q116 Q216 C 3786-8 PN4250A Q117 Q217 D 2961-7 SEL 2N3859A Q118 Q218 D 2961-7 SEL 2N3859A Q119 Q219 C 3625-8 2N4125 Q120 Q220 C 3625-8...
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Page 33: Cable Tie
Power Base-2 & 800CSL Amplifier Service Manual Q42818-7 Main Module Parts List (D 7251-8 Board) INTERCONNECTS C 7593-4 HEADER 5 PIN C 4508-5 16 PIN SOCKET C 7527-2 HEADER 6 PIN C 7592-6 HEADER 4 PIN C 7526-4 HEADER 3 PIN... -
Page 34: Q43059-7 Main Module (Thc)
Power Base-2 & 800CSL Amplifier Service Manual Q43059-7 Main Module Parts List (D 7993-5 Board) Q43059-7 Applicability: Main Module for Through Hole Chassis (THC) PB-2/800CSL units. CAPACITORS C 4303-1 1000µF C 3913-8 470µF C 6802-0 .47µF C 6806-1 .01µF C 6806-1 .01µF... - Page 35 Power Base-2 & 800CSL Amplifier Service Manual Q43059-7 Main Module Parts List (D 7993-5 Board) Q119 Q219 C 3625-8 NPN 2N4125 Q120 Q220 C 3625-8 NPN 2N4125 Q121 Q221 C 7458-0 NPN 2N4123 Q122 Q222 C 7458-0 NPN 2N4123 Q123...
- Page 36 Power Base-2 & 800CSL Amplifier Service Manual Q43059-7 Main Module Parts List (D 7993-5 Board) R193 R293 A10266-1031 R194 R294 A10266-1041 100K R195 R295 A10266-3021 R196 R296 A10266-4721 4.7K R197 R297 A10266-1031 R198 R298 A10266-4721 4.7K R199 R299 A10266-1031 R909...
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