Power Base-2 & 800CSL Amplifier Service Manual POWER AMPLIFIER SERVICE MANUAL POWER BASE-2 & 800CSL ® ™ ©1995 by CROWN INTERNATIONAL, INC. Mailing Address: P.O. Box 1000 Elkhart, IN U.S.A. 46515-1000 Shipping Address: 57620 C.R. 105 Elkhart, IN U.S.A. 46517 CSL™ is a trademark and Power Base-2,® ODEP,® and Crown® are registered trademarks of Crown International, Inc.
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. If you need special assistance beyond the scope of this manual, please contact the Crown Technical Support Group. Mail: P.O. Box 1000 Elkhart IN 46515-1000 Shipping: 57620 C.R.
Power Base-2 & 800CSL Amplifier Service Manual Table of Contents Introduction ............................................................. 4 Scope ...................................................................... 4 Warranty .................................................................. 4 Parts ........................................................................ 5 Specifications .......................................................... 6 Voltage Conversion ....................................
Power Base-2 & 800CSL Amplifier Service Manual Introduction This manual contains service information on Crown power amplifiers. It is designed to be used in conjunction with the applicable Owner's Manual. However, some important information is duplicated in this Service Manual in case the Owner's Manual is not readily available. Each of the compact audio power amplifiers are designed for professional or commercial use.
Power Base-2 & 800CSL Amplifier Service Manual Parts 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. 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.
Power Base-2 & 800CSL Amplifier Service Manual Specifications 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). Because our testing methods are more stringent than our published specifications, every Crown amplifier will exceed its published specifications.
Power Base-2 & 800CSL Amplifier Service Manual Voltage Conversion PB/CSL Universal Fuse Board P16 P6 P15 P5 P14 P4 P13 P3 P10 P9 P8 P7 BLU BRN P12 P2 P11 P1 100V Connections: P10 to P15 P11 to P14 P7 to P12 120V Connections: P10 to P16 P11 to P14 P7 to P13 220V Connections: P10 to P15 P9 to P14 P8 to P13 P19 P20 P22 F100 P18 F1 240V Connections: P10 to P16 P9 to P14 P8 to P13 For list of applicable transformer, fuse F100, fanformer, and power cord refer to voltageparts cross-reference.
Power Base-2 & 800CSL Amplifier Service Manual Theory 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 service 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.
Power Base-2 & 800CSL Amplifier Service Manual Theory 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 output. Note that earlier models (before main modules built with D 7911-7 board) did not support the 1.4V sensitivity.
Power Base-2 & 800CSL Amplifier Service Manual Theory 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. GROUNDED BRIDGE TOPOLOGY Figure 2 is a simplified example of the grounded bridge output topology.
Power Base-2 & 800CSL Amplifier Service Manual Theory 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. Flyback diodes shunt back-EMF pulses from reactive loads to the power supply to protect output devices from dangerous reverse voltage levels.
Power Base-2 & 800CSL Amplifier Service Manual Theory ±ODEP circuitry is used to simulate the thermal barriers 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. The combined effects of thermal history and instantaneous dynamic power level result in an accurate simulation of the actual thermal condition of the output transistors.
Power Base-2 & 800CSL Amplifier Service Manual Checkout Procedures GENERAL INFORMATION TEST 3: ODEP VOLTAGE ADJUSTMENT 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 procedure. These tests, though meant for verification and alignment of the amplifier, may also be very helpful in troubleshooting. For best results, tests should be performed in order. Spec: Cold Bias Per Charts Below ±0.1V DC.
Power Base-2 & 800CSL Amplifier Service Manual Checkout Procedures 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. TEST 5: COMMON MODE REJECTION Spec at 100 Hz: –70 dB. Spec at 20 kHz: –50 dB. Initial Conditions: Controls per standard. Procedure: No load.
Power Base-2 & 800CSL Amplifier Service Manual Checkout Procedures 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. Inject a 1 kHz sine wave with 15 VAC output for 10 seconds. Procedure Torture: Load each channel with the primary (red and black leads) of a DC-300A transformer (D 5781-6).
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 positions required by customer. If conditions are unknown or unspecified, factory settings are as follows: Level Controls: 9 to 11 O’Clock. Sensitivity Switch: 0.775V U.S., 1.4V International. Stereo/Mono Switch: Stereo. Ground Lift: Lift. Power: Off.
Power Base-2 & 800CSL Amplifier Service Manual Mechanical (Non-Module) Parts SUPPLIMENTAL ITEMS CPN D 4137-2 C 3342-0 A10087-71012 ITEM Nylon Thumbscrew Washer Feet, Black Self-Stick 10-32 .75 Machine (Rack Screw) QTY 4 4 4 120VAC/60HZ NORTH AMERICA PRODUCT ONLY CPN A10089-10832 A10285-28 A10285-7 D 6748-4 A10089-10832 A10101-19 H42873-2 P10426-8 P10125-6 ITEM Screw, 8-32 2.0 Ph Machine Fuse, 20A 3AB (120V Units) Fuse, .5A AGC 1.25x.25 (LVPS) PB-2 Power Transformer Screw, 8-32 2.
Power Base-2 & 800CSL Amplifier Service Manual Mechanical (Non-Module) Parts OUTPUT ASSEMBLY (ONE PER CHANNEL) CPN A10100-4 A10315-1 C 4751-1 C 5826-0 C 6492-0 C 7326-9 C 8573-5 C 8574-3 C 8813-5 C 9327-9 C 9491-9 D 7665-9 D 7666-7 D 7796-2 D 7797-0 D 8197-2 D 8264-0 F12019-0 M21324-5 ITEM Washer, #6 Flat Zinc Screw, 6-32-.
Power Base-2 & 800CSL Amplifier Service Manual Mechanical (Non-Module) Parts MAIN CHASSIS ASSEMBLY CPN A10086-70806 A10094-3 A10094-6 A10094-8 A10099-5 A10109-10822 A10110-70812 A10192-1 C 1811-6 C 3163-0 C 6487-0 C 6912-7 C 6913-5 C 6914-3 C 8341-7 C 9491-9 C 9953-8 D 7600-6 D 7784-8 D 8002-4 D 8067-7 F10787J3 M21082J8 ITEM Screw, 8-32-.37 Mach Rd Ph Washer, #6 Black Star Washer, #8 Black Star Washer, #10 Tooth Lock Washer, #8 Nylon Shoulder Screw, 8-18-1.375 Pan Ph Screw, 8-32-.
Power Base-2 & 800CSL Amplifier Service Manual Module Information MODULE HISTORY MAIN MODULES: 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.
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 C01 C02 C03 C04 C05 C06 C07 C08 C09 C 3978-1 C 6804-6 C 6804-6 C 3996-3 C 6807-9 C 6806-1 C 6807-9 C 6809-5 C 6810-3 .047µF .1µF .1µF .0047µF .001µF .01µF .
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 C01 C02 C03 C04 C05 C06 C07 C08 C09 C 3978-1 C 3218-2 C 3218-2 C 8534-7 C 6807-9 C 6806-1 C 6807-9 C 6810-3 C 6809-5 .047µF .22µF .22µF .0047µF .001µF .01µF .
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 C01 C02 C03 C04 C05 C06 C07 C08 C09 C43 C 8511-5 C 7964-7 C 7964-7 C 8534-7 C 8534-7 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 6806-1 .047µF .22µF .22µF .0047µF .0047µF .01µF .001µF 180pF 220pF .
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 C01 C02 C03 C04 C05 C06 C07 C08 C09 C43 C 8511-5 C 7964-7 C 7964-7 C 8534-7 C 6807-9 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 6806-1 .047µF .22µF .22µF .0047µF .001µF .01µF .001µF 180pF 220pF .
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 C01 C02 C03 C04 C05 C06 C07 C08 C09 C43 C 8511-5 C 7964-7 C 7964-7 C 8534-7 C 8534-7 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 6806-1 .047µF .22µF .22µF .0047µF .0047µF .01µF .001µF 180pF 220pF .
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 C01 C02 C03 C04 C05 C06 C07 C08 C09 C43 C 8511-5 C 7964-7 C 7964-7 C 8534-7 C 8534-7 C 6806-1 C 6807-9 C 6810-3 C 6809-5 C 6806-1 .047µF .22µF .22µF .0047µF .0047µF .01µF .001µF 180pF 220pF .
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 C1 C2 C3 C4 C100 C101 C103 C104 C105 C106 C108 C112 C113 C114 C115 C116 C117 C118 C122 C123 C124 C125 C127 C128 C133 C134 C135 C136 C137 C138 C139 C140 C141 C200 C201 C203 C204 C205 C206 C208 C212 C213 C214 C215 C216 C217 C218 C222 C223 C224 C225 C227 C228 C233 C234 C235 C236 C237 C238 C239 C240 C241 C242 C 4303-1 C 3913-8 C 4303-1 C 6802-0 C 5311-3 C 2821-
Power Base-2 & 800CSL Amplifier Service Manual Q42665-2 Main Module Parts List (D 6910-0 Board) R111 R112 R113 R114 R115 R116 R117 R118 R119 R120 R121 R122 R123 R124 R125 R126 R127 R128 R129 R130 R131 R132 R133 R134 R135 R136 R137 R138 R139 R140 R141 R142 R146 R147 R148 R149 R150 R151 R152 R154 R156 R157 R158 R159 28 R211 R212 R213 R214 R215 R216 R217 R218 R219 R220 R221 R222 R223 R224 R225 R226 R227 R228 R229 R230 R231 R232 R233 R234 R235 R236 R237 R238 R239 R240 R241 R242 R246 R247 R248 R249 R250 R251
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 C1 C2 C3 C4 C100 C101 C103 C104 C105 C106 C108 C112 C113 C114 C115 C116 C117 C118 C122 C123 C124 C125 C127 C128 C130 C133 C134 C135 C136 C137 C138 C139 C140 C141 C144 C145 C146 C147 C148 C149 C152 C153 C200 C201 C203 C204 C205 C206 C208 C212 C213 C214 C215 C216 C217 C218 C222 C223 C224 C225 C227 C228 C233 C234 C235 C236 C237 C238 C239 C240 C241 C242 C244 C245 C246
Power Base-2 & 800CSL Amplifier Service Manual Q42683-5 Main Module Parts List (D 6910-0 Board) R100 R101 R102 R103 R104 R105 R106 R107 R108 R109 R110 R111 R112 R113 R114 R115 R116 R117 R118 R119 R120 R121 R122 R123 R124 R125 R126 R127 R128 R129 R130 R131 R132 R133 R134 R135 R136 R137 R138 R139 R140 R141 R142 R146 R147 R148 R149 R150 R151 R152 R153 R156 R157 30 R200 R201 R202 R203 R204 R205 R206 R207 R208 R209 R210 R211 R212 R213 R214 R215 R216 R217 R218 R219 R220 R221 R222 R223 R224 R225 R226 R227 R228 R
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 C1 C2 C4 C5 C6 C7 C8 C100 C101 C103 C104 C105 C106 C108 C112 C113 C114 C115 C116 C117 C118 C122 C123 C124 C125 C127 C128 C130 C133 C134 C135 C136 C137 C138 C139 C140 C141 C144 C145 C146 C147 C148 C 149 C152 C153 C200 C201 C203 C204 C205 C206 C208 C212 C213 C214 C215 C216 C217 C218 C222 C223 C224 C225 C227 C228 C230 C233 C234 C235 C236 C237 C238 C239 C
Power Base-2 & 800CSL Amplifier Service Manual Q42818-7 Main Module Parts List (D 7251-8 Board) Q116 Q117 Q118 Q119 Q120 Q121 Q122 Q216 Q217 Q218 Q219 Q220 Q221 Q222 C 3786-8 D 2961-7 D 2961-7 C 3625-8 C 3625-8 C 7458-0 C 7458-0 PN4250A SEL 2N3859A SEL 2N3859A 2N4125 2N4125 2N4123 2N4123 A10265-53621 A10266-2402 A10266-2402 A10265-46421 A10266-3321 A10266-5621 A10266-4331 A10266-1021 A10266-8221 A10266-6211 A10265-49911 A10266-1021 A10266-1041 A10266-2721 A10266-2721 A10266-1231 A10266-6831 A10266-1021
Power Base-2 & 800CSL Amplifier Service Manual Q42818-7 Main Module Parts List (D 7251-8 Board) INTERCONNECTS J1 J2 J9 J10 J11 J100 J500 J600 J200 J800 J700 C 7593-4 C 4508-5 C 7527-2 C 7592-6 C 7526-4 C 6777-4 D 6619-7 D 6620-5 HEADER 5 PIN 16 PIN SOCKET HEADER 6 PIN HEADER 4 PIN HEADER 3 PIN PHONE JACK 10" RIBBON ASSY 6" RIBBON ASSY MISC.
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.
Power Base-2 & 800CSL Amplifier Service Manual Q43059-7 Main Module Parts List (D 7993-5 Board) Q119 Q120 Q121 Q122 Q123 Q124 Q219 Q220 Q221 Q222 Q223 Q224 C 3625-8 C 3625-8 C 7458-0 C 7458-0 C 7458-0 C 3625-8 NPN 2N4125 NPN 2N4125 NPN 2N4123 NPN 2N4123 NPN 2N4123 NPN 2N4125 A10265-53621 C 7340-0 C 7340-0 A10265-46421 A10266-3321 A10266-1041 A10266-2031 A10266-5121 A10266-5121 A10266-2031 A10266-1041 C 7409-3 A10265-49911 A10266-5111 A10265-10031 A10266-2721 A10266-2721 A10266-1231 A10266-6831 A10266-8
Power Base-2 & 800CSL Amplifier Service Manual Q43059-7 Main Module Parts List (D 7993-5 Board) R193 R194 R195 R196 R197 R198 R199 R909 R910 R911 R912 R913 R915 R916 R917 R918 R919 R920 R921 R293 R294 R295 R296 R297 R298 R299 R1009 R1010 R1011 R1012 R1013 R1015 R1016 R1017 R1018 R1019 R1020 R1021 A10266-1031 A10266-1041 A10266-3021 A10266-4721 A10266-1031 A10266-4721 A10266-1031 A10266-4741 A10266-4741 A10266-1521 A10266-4711 A10266-1051 A10266-1001 A10266-1001 A10266-10021 A10266-10021 A10266-10021 A102