Crown 460CSL Service Manual
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Crown 460CSL Service Manual

Crown stereo amplifier user manual
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Power Base-1 & 460CSL Amplifier Service Manual

POWER AMPLIFIER

SERVICE MANUAL
POWER BASE-1
®
& 460CSL
™
©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-1,
®
ODEP
®
and Crown
®
are registered trademarks of Crown International, Inc.
K-SVCPB1
1-95
1

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Summary of Contents for Crown 460CSL

  • Page 1: Power Amplifier

    Power Base-1 & 460CSL Amplifier Service Manual POWER AMPLIFIER SERVICE MANUAL POWER BASE-1 ® & 460CSL ™ ©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 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. If you need special assistance beyond the scope of this manual, please contact the Crown Technical Support Group.

  • Page 3: Table Of Contents

    Power Base-1 & 460CSL 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

    Note that Crown does not sell blank (unpopulated) circuit boards. Introduction Each of the compact audio power amplifiers are designed for professional or commercial use.

  • Page 5: Parts

    PART NUMBERING SYSTEMS As of the printing of this manual, Crown is using two numbering systems. The elder system always uses eight characters. The first character is a letter. Com- mon letters used are C, D, H, M, P, and Q.

  • Page 6: Specifications

    Power Base-1 & 460CSL 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-1/460CSL in order to be used at different international line volt- ages. Refer also to Mechanical Parts Lists. 100V AC Mains: 10A Fuse 0.5A Low Voltage Supply Fuse...

  • Page 8: Circuit Theory

    PB models only. It is also important to realize that over time Crown has introduced numerous improvements to PB/CSL amplifiers. Though often changes are minor, and are made for a variety of reasons, a few changes have had a significant impact on the operation of the circuitry.
  • Page 9 Power Base-1 & 460CSL 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 Power Base-1 & 460CSL 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-1 & 460CSL 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 The combined effects of thermal history and instantaneous dynamic power level result in an accurate simulation of the actual thermal condi- tion of the output transistors. BALANCED INPUTS Figure 3. Typical Crown Amplifier Basic Block Diagram (One Channel Shown) Theory +VOLTAGE TRANSLATOR ERROR OUTPUT...

  • Page 13: Test Procedures

    Power Base-1 & 460CSL 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-1 & 460CSL 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-1 & 460CSL 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.
  • Page 16 Power Base-1 & 460CSL Amplifier Service Manual Checkout Procedures...

  • Page 17: Mechanical Parts Listing

    Power Base-1 & 460CSL 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 A10285-26 Fuse, 10A 3AB (120V Units) A10285-7 Fuse, .5A AGC 1.25x.25 (LVPS)
  • Page 18 Power Base-1 & 460CSL 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 Power Base-1 & 460CSL Amplifier Service Manual Mechanical (Non-Module) Parts MAIN CHASSIS ASSEMBLY ITEM A10086-11008 Screw, 10-32-.5 Mach Rd Ph A10086-70806 Screw, 8-32-.37 Mach Rd Ph A10089-11032 Screw, 10-32-2 Mach Pan Ph A10094-3 Washer, #6 Black Star A10094-6 Washer, #8 Black Star...

  • Page 20: Module Information

    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.

  • Page 21: Q42576-1 Output Module (Original)

    Power Base-1 & 460CSL Amplifier Service Manual Q42576-1 Output Module Parts List (P10137-1 Board) Q42576-1 Output Module (4 Resistor Original) for PB-1: 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...

  • Page 22: Q42661-1 Output Module (#2)

    Power Base-1 & 460CSL Amplifier Service Manual Q42661-1 Output Module Parts List (P10137-1 Board) Q42661-1 Output Module (4 Resistor #2) for PB-1: 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...

  • Page 23: Q42718-9 Output Module (#3)

    Power Base-1 & 460CSL Amplifier Service Manual Q42718-9 Output Module Parts List (P10233-8 Board) Q42718-9 Output Module (4 Resistor #3) for PB-1: 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...

  • Page 24: Q42885-6 Output Module (To-3P)

    Power Base-1 & 460CSL Amplifier Service Manual Q42885-6 Output Module Parts List (P10305-4 Board) Q42885-6 Output Module (4 Resistor TO-3P Drivers) for PB-1/460CSL: 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: Q42967-2 Output Module (Thc)

    Power Base-1 & 460CSL Amplifier Service Manual Q42967-2 Output Module Parts List (P10341-9 Board) Q42967-2 Output Module for Through Hole Chassis (THC) PB-1/460CSL 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: Q43200-7 Output Module (Thc #2)

    Power Base-1 & 460CSL Amplifier Service Manual Q43200-7 Output Module Parts List (P10397-1 Board) Q43200-7 Output Module (THC #2) for PB-1/460CSL 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: Q42552A0 Main Module (Original)

    Power Base-1 & 460CSL Amplifier Service Manual Q42552A0 Main Module Parts List (D 6304B2 Board) Q42552A0 Main Module (Original) for PB-1: CAPACITORS C 4303-1 1000uF C 3913-8 470uF C 4303-1 1000uF C 6802-0 .47uF C100 C200 C 5053-1 18uF C101...
  • Page 28 Power Base-1 & 460CSL Amplifier Service Manual Q42552A0 Main Module Parts List (D 6304B2 Board) R114 R214 A10266-4721 4.7K R115 R215 A10266-5141 510K R116 R216 A10266-3351 3.3M R118 R218 A10266-2711 270 OHM R119 R219 A10266-3011 300 OHM R120 R220 A10266-2711...

  • Page 29: Q42664-5 Main Module (Service Only)

    Power Base-1 & 460CSL Amplifier Service Manual Q42664-5 Main Module Parts List (D 6910-0 Board) Q42664-5 Main Module (Service Replacement For Origi- nal) for PB-1: CAPACITORS C 4303-1 1000uF C 3913-8 470uF C 4303-1 1000uF C 6802-0 .47uF C100 C200...
  • Page 30 Power Base-1 & 460CSL Amplifier Service Manual Q42664-5 Main Module Parts List (D 6910-0 Board) R110 R210 A10266-4731 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...

  • Page 31: Q42682-7 Main Module (#2)

    Power Base-1 & 460CSL Amplifier Service Manual Q42682-7 Main Module Parts List (D 6910-0 Board) Q42682-7 Main Module (#2) for PB-1: CAPACITORS C 4303-1 1000uF C 3913-8 470uF C 4303-1 1000uF C 6802-0 .47uF OPEN OPEN C100 C200 C 5311-3...
  • Page 32 Power Base-1 & 460CSL Amplifier Service Manual Q42682-7 Main Module Parts List (D 6910-0 Board) RESISTORS A10265-53621 53.6K 1% OPEN OPEN A10265-46421 46.4K 1% A10266-3323 3.3K 1W OPEN R100 R200 C 7409-3 5K POT R101 R201 A10265-49911 4.99K R102 R202...
  • Page 33 Power Base-1 & 460CSL Amplifier Service Manual Q42682-7 Main Module Parts List (D 6910-0 Board) MISC. BOARD D 6910-0 MOUNTS U1, U2: C 1889-2 6-32 NUT C 2176-3 6-32 X .5 SCREW C 5341-0 HEATSINK C 5594-4 STAR WASHER MOUNTS U104, U204:...

  • Page 34: Q42776-7 Main Module (3Rd Gain)

    Power Base-1 & 460CSL Amplifier Service Manual Q42776-7 Main Module Parts List (D 7251-8 Board) Q42776-7 Main Module (3rd Gain) for PB-1: 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 35 Power Base-1 & 460CSL Amplifier Service Manual Q42776-7 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...
  • Page 36 Power Base-1 & 460CSL Amplifier Service Manual Q42776-7 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 37: Q42953-2 Main Module (3Rd Gain Pb-1)

    Power Base-1 & 460CSL Amplifier Service Manual Q42953-2 Main Module Parts List (D 7251-8 Board) Q42953-2 PB-1 Main Module 3rd Gain Stage and Improved offset (Original 460CSL Main Module.): CAPACITORS C 3913-8 470µF C 3913-8 470µF C 6802-0 .47µF C 6806-1 .01µF...
  • Page 38 Power Base-1 & 460CSL Amplifier Service Manual Q42953-2 Main Module Parts List (D 7251-8 Board) RESISTORS N100 N200 D 4669-4 CMR Trim Network N101 N201 D 6081-0 Resistor Network N102 N202 D 6082-8 Resistor Network A10265-53621 53.6K 1% C 7340-0...
  • Page 39 Power Base-1 & 460CSL Amplifier Service Manual Q42953-2 Main Module Parts List (D 7251-8 Board) MISC. Board D 7251-8 Blank PC Board Socket C 3450-1 14 Pin U104/204 A10102-5 Hex 6-32 Heatsink C 5341-0 TO-220 Torq Sprdr C 6541-4 Washer...

  • Page 40: Q43060-5 Main Module (Thc)

    Power Base-1 & 460CSL Amplifier Service Manual Q43060-5 Main Module Parts List (D 7993-5 Board) Q43060-5 Applicability: Main Module for Through Hole Chassis (THC) PB-1/460CSL units. CAPACITORS C 4303-1 1000µF C 3913-8 470µF C 6802-0 .47µF C 6806-1 .01µF C 6806-1 .01µF...
  • Page 41 Power Base-1 & 460CSL Amplifier Service Manual Q43060-5 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 42 Power Base-1 & 460CSL Amplifier Service Manual Q43060-5 Main Module Parts List (D 7993-5 Board) R191 R291 A10266-3331 R192 R292 A10266-1031 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...

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