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Power Base-1 & 460CSL Amplifier Service Manual

39

MISC.

Board

D 7251-8

Blank PC Board

Socket

C 3450-1

14 Pin U104/204

Nut

A10102-5

Hex 6-32

Heatsink

C 5341-0

TO-220

Torq Sprdr

C 6541-4

Washer

C 8973-7

#6, Split

Screw

C 9067-7

Stainless

J1

C 7593-4

5 Pin Header

J2

C 4508-5

16 Pin Socket

J9

C 7527-2

6 Pin Header

J10

C 7592-6

4 Pin Header

J11

C 7526-4

3 Pin Header

J100

J200

C 6777-4

Phone Jack

Cover

C 6778-2

Phone Jack Cover

J500

J800

D 6619-7

10 Inch Ribbon

J600

J700

D 6620-5

6 Inch Ribbon

Q42953-2 Main Module Parts List (D 7251-8 Board)

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Содержание 460 CSL

Страница 1: ...IFIER SERVICE MANUAL K SVCPB1 1 95 CSL is a trademark and Power Base 1 ODEP and Crown are registered trademarks of Crown International Inc MailingAddress P O Box 1000 Elkhart IN U S A 46515 1000 ShippingAddress 57620 C R 105 Elkhart IN U S A 46517 1995 by CROWN INTERNATIONAL INC ...

Страница 2: ...O ACCESS GAIN SWITCH CAUTION AVIS WARNING TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE 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 t...

Страница 3: ...ation 20 Q42576 1 Output Module Original 21 Q42661 1 Output Module 2 22 Q42718 9 Output Module 3 23 Q42885 6 Output Module TO 3P 24 Q42967 2 Output Module THC 25 Q43200 7 Output Module THC 2 26 Q42552A0 Main Module Original 27 Q42664 5 Main Module Service Only 29 Q42682 7 Main Module 2 31 Q42776 7 Main Module 3rd Gain 34 Q42953 2 Main Module 3rd Gain PB 1 37 Q43060 5 Main Module THC 40 Table of Co...

Страница 4: ...fic 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 ...

Страница 5: ...four character number after the prefix letter the space is considered a character The seventh character is usually a hy phen though it may be a letter to indicate a revision or specialnote Thelastcharacteriscalledacheck digit and is useful to Crown for internal tracking Crown is in the process of converting to a new part number system Length may vary from eight to twelve characters There is still ...

Страница 6: ...microsecond Damping Factor 1000 from 10 Hz to 400 Hz DC Offset 10 millivolts Input Impedance Nominally 20K ohms balanced 10K ohms unbalanced Output Impedance 10 milliohms in series with 2 microhenries Protection Systems Output Device Emulation Protec tion ODEP limits drive in the event of dangerous dynamicthermalconditionswithoutinterruptingpower Current limiting for shorted load protection DC LF ...

Страница 7: ...ble transformer fuse F100 fanformer and power cord refer to voltage parts cross reference S1 Power Switch PB CSL Universal Fuse Board 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 A10285 26 0 5A Low Voltage Supply Fuse A10285 7 Power Transformer Universal D 7598 2 Transmotor ...

Страница 8: ...nthebassfrequencyrange This feedback along with our compensation and ultra low distortion output topology make Crown amplifiers superior Features specific to the Power Base CSL Series in clude a single core transformer one primary with two independent ungrounded secondaries a full time full speed fan which also serves as the low voltage transformer slew rate limiting and audio muting for delay or ...

Страница 9: ...r network splits the Error Signal ES into positive and negative drive signals for the bal ancedvoltagetranslatorstage Theseoffsetreference voltages drive the input to the Voltage Translator transistors A nested NFb loop from the output of the amplifier mixes with the inverted signal riding on the offset references This negative feedback fixes gain at the offset reference points and the output of t...

Страница 10: ...stage is off Theory Vcc Positive Rail Vcc Negative Rail Load speaker Input signal HIGH SIDE LOW SIDE Inverting Op amp Figure 2 Crown Patented Grounded Bridge Topology The output of the LVA drives the base of predriver device Together the predriver and driver form the first two parts of the three deep Darlington and are biased class AB They provide output drive through the bias resistor bypassing t...

Страница 11: ...further from ground poten tial At the negative amplifier output peak Vcc 0V and Vcc equals the total power supply potential with Theory anegativepolarity Usingthesameexampleasabove a 70V supply would allow a negative output peak of 70V In summary a power supply which produces a total of 70VDC rail to rail or 35VDC statically is capable of producing 140V peak to peak at the ampli fier output when t...

Страница 12: ...ic power level result in an accurate simulation of the actual thermal condi tion of the output transistors NEGATIVE LOW SIDE OUTPUT PNP STAGE POSITIVE LOW SIDE OUTPUT NPN STAGE NEGATIVE HIGH SIDE OUTPUT PNP STAGE POSITIVE HIGH SIDE OUTPUT NPN STAGE HIGH SIDE BIAS SERVO LVA 1 LVA 1 VOLTAGE TRANSLATOR VOLTAGE TRANSLATOR OUTPUT DEVICE EMULATION PROTECTION ERROR AMP VGS BGS BALANCED INPUTS INVERTING B...

Страница 13: ...Initial Conditions Controls per standard heatsink tem perature less than 40 C Procedure Measure DC voltages on the output module across R31 adjust R26 if necessary Measure DC voltages on the output module across R32 adjust R23 if necessary Repeat for second channel TEST 3 ODEP VOLTAGE ADJUSTMENT Spec Cold Bias Per Charts Below 0 1V DC Initial Conditions Controls per standard heatsink at room tempe...

Страница 14: ...hin 10 of each other TEST 8 LEVEL CONTROLS Spec Level controlled by level controls Initial Conditions Controls per standard Checkout Procedures Procedure No Load Inject a 1 kHz sine wave With level controls fully clockwise you should see full gain As controls are rotated counterclockwise observe similar gain reduction in each channel When com plete return level controls to fully clockwise position...

Страница 15: ...quare wave into each channel and verify that each channel cycles into mute TEST 16 SIGNAL TO NOISE RATIO Spec 100 dB 105 dB A weighted below rated 8 ohm power Initial Conditions Controls per standard Short inputs Procedure Load each channel to 8 ohms Measure less than 400 µV at the output of each channel or 100 dB from reference of 34 25 dBu TEST 17 TURN ON TRANSIENTS Spec No dangerous transients ...

Страница 16: ...Power Base 1 460CSL Amplifier Service Manual 16 Checkout Procedures ...

Страница 17: ...Board U S Only 1 P10426 6 Fuse Board International Only 1 FANFORMER MECHANICAL ASSEMBLY CPN ITEM QTY C 7062 0 Screw 6 32 5 16 Flat Mach 2 C 9939 7 Fan Blade 4 inch CCW 1 D 8439 8 Fan Bracket 1 FILTER CAPACITOR MOUNTING ASSEMBLY ONE PER CHANNEL CPN ITEM QTY A10095 4 Washer 10 Ext Lock 2 A10098 5 Belleville Spring Washer 2 C 7015 8 C126 C226 7800µF 90V 1 C 8752 5 D117 D217 35A 400V Bridge Rectifier ...

Страница 18: ...put Thru Hole Pad Insulator 1 D 8264 0 PTC Thermal Sensor 1 F12019 0 Diode Heatsink Slug 1 F12469 7 Heatsink Aluminum 2 Output Module See Module List 1 BACK PANEL ASSEMBLY CPN ITEM QTY A10214 7 Strain Relief Power Cord 1 C 2823 0 Dual Binding Post Assembly 1 D 7074 4 Power Cord 3 14 15A USA 1 M21208J9 Back Panel 1 A10019 8 Nut 8 32 2 Captive 2 CHASSIS FRONT ASSEMBLY CPN ITEM QTY A10031 1 Nut 8 32 ...

Страница 19: ...5 Pan Ph 2 A10110 70812 Screw 8 32 75 Taptite Pan Ph 2 A10192 1 Snap Bushing 5 4 C 1811 6 Tie Wrap 4 C 3163 0 Solder Lug 6 505 1 C 6487 0 Power Switch 22A Rocker 2 Pole 1 C 6912 7 Tension Retainer Board Support 2 C 6913 5 Spacer Nut 1 inch 2 C 6914 3 Spacer Nut 75 inch 2 C 9491 9 Screw 6 32 312 Taptite Pan 4 C 9953 8 Screw 6 20 312 Taptite Pan Black 6 D 7340 9 Label F1 Fuse Replacement 1 D 7600 6 ...

Страница 20: ...MT 1200 LX It did not include ground lift but did offer a choice of 775V or 26 dB voltage gain sensitivi ties No longer available Q42664 5 ServicereplacementforQ42552A0forPB 1 Nolonger available Q42682 7 Main 2 Upgraded board from Q42552A0 for PB 1 No longer available Q42776 7 Universally usable PC board finished module used in MT 600 1200 MA 600 1200 and PB 1 Added third gain stage and ground lif...

Страница 21: ...0266 7501 75 R01 A10266 4711 470 R02 C 7778 1 5 6 R03 C 6486 2 2 5W R08 C 6486 2 2 5W R09 C 7779 9 22 R10 A10266 4711 470 R11 C 1001 4 2 7 1W R12 C 1001 4 2 7 1W R13 A10266 7501 75 R14 C 1001 4 2 7 1W R15 C 6486 2 2 5W R20 C 6486 2 2 5W R21 C 7778 1 5 6 R22 C 7779 9 22 R23 C 6844 2 250 Pot LS Bias R24 A10266 1331 13K R25 A10266 2221 2 2K R26 C 6844 2 250 Pot HS Bias R27 A10266 3911 390 R28 A10266 ...

Страница 22: ...R01 A10266 4711 470 R02 C 7778 1 5 6 R07 D 6600 7 19 5W R09 C 7779 9 22 R10 A10266 4711 470 R11 C 1001 4 2 7 1W R12 C 1001 4 2 7 1W R13 A10266 7501 75 R14 C 1001 4 2 7 1W R15 D 6600 7 19 5W R16 D 6600 7 19 5W R19 D 6600 7 19 5W R21 C 7778 1 5 6 R22 C 7779 9 22 R23 C 6844 2 250 Pot LS Bias R24 A10266 1331 13K R25 A10266 2221 2 2K R26 C 6844 2 250 Pot HS Bias R27 A10266 3911 390 R28 A10266 1331 13K ...

Страница 23: ...2 2W R15 D 6600 7 19 5W R16 D 6600 7 19 5W R19 D 6600 7 19 5W R23 C 6844 2 250 Pot LS Bias R24 A10266 1331 13K R25 A10266 2221 2 2K R26 C 6844 2 250 Pot HS Bias R27 A10266 3911 390 R28 A10266 1331 13K R30 A10265 10201 102 R31 C 7778 1 5 6 5W Flame Proof R32 C 7778 1 5 6 5W Flame Proof R33 C 7779 9 22 5W Flame Proof R34 C 7779 9 22 5W Flame Proof R35 A10266 1204 12 2W R36 A10266 1204 12 2W R37 A102...

Страница 24: ...1 C 1001 4 2 7 1W R12 C 3931 0 12 2W R13 A10266 7501 75 R16 D 6600 7 19 5W R19 D 6600 7 19 5W R23 C 6844 2 250 Pot LS Bias R24 A10266 1331 13K R25 A10266 2221 2 2K R26 C 6844 2 250 Pot HS Bias R27 A10266 3911 390 R28 A10266 1331 13K R29 C 6402 9 51 OHM R30 A10265 10201 102 R31 C 7778 1 5 6 flame proof R32 C 7778 1 5 6 flame proof R33 C 7779 9 22 flame proof R34 C 7779 9 22 flame proof R35 C 3931 0...

Страница 25: ... 7501 75 R14 A10266 1204 12 2W R16 D 6600 7 19 5W R19 D 6600 7 19 5W R23 C 6844 2 250 Pot LS Bias R24 A10266 1331 13K R25 A10266 2221 2 2K R26 C 6844 2 250 Pot HS Bias R27 A10266 3911 390 R28 A10266 1331 13K R29 A10266 5101 51 R30 A10265 10201 102 R31 C 7778 1 5 6 5W Flame Proof R32 C 7778 1 5 6 5W Flame Proof R33 C 7779 9 22 5W Flame Proof R34 C 7779 9 22 5W Flame Proof R35 A10266 1204 12 2W R36 ...

Страница 26: ... 75 R14 A10266 1204 12 2W R16 D 6600 7 19 5W R19 D 6600 7 19 5W R23 C 6844 2 250 Pot LS R24 A10266 1331 13K R25 A10266 2221 2 2K R26 C 6844 2 250 Pot HS R27 A10266 3911 390 R28 A10266 1331 13K R29 A10266 5101 51 R30 A10265 10201 102 R31 C 7778 1 5 6 5W Flame Proof R32 C 7778 1 5 6 5W Flame Proof R33 C 7779 9 22 5W Flame Proof R34 C 7779 9 22 5W Flame Proof R35 A10266 1204 12 2W R36 A10266 1204 12 ...

Страница 27: ... D109 D209 C 3181 2 1N4148 D110 D210 C 3181 2 1N4148 D111 D211 C 3181 2 1N4148 D112 D212 C 3181 2 1N4148 D113 D213 C 3181 2 1N4148 D114 D214 C 3181 2 1N4148 D115 D215 C 3181 2 1N4148 D120 D220 C 3181 2 1N4148 D121 D221 C 3181 2 1N4148 D122 D222 C 3181 2 1N4148 D123 D223 C 3181 2 1N4148 NETWORK RESISTORS N100 N200 D 4669 4 Balanced Input Trim N101 N201 D 6081 0 Resistor Network B N102 N202 D 6082 8...

Страница 28: ... 2721 2 7K R151 R251 A10266 1031 10K R152 R252 A10266 1231 12K R154 R254 A10266 1011 100 OHM R156 R256 A10266 1321 1 3K R157 R257 A10266 1321 1 3K R158 R258 A10266 9121 9 1K R159 R259 A10266 1031 10K R161 R261 A10266 4701 47 OHM R162 R262 A10266 4701 47 OHM R165 R265 A10265 53611 5 36K 1 R146 R246 A10265 53611 5 36K 1 R167 R267 A10266 1021 1K R168 R268 A10265 95301 953 OHM R170 R270 A10266 1021 1K...

Страница 29: ... D206 C 2851 1 1N4004 D107 D207 C 2851 1 1N4004 D108 D208 C 3181 2 1N4148 D109 D209 C 3181 2 1N4148 D110 D210 C 3181 2 1N4148 D111 D211 C 5061 4 1N3070 D112 D212 C 3181 2 1N4148 D113 D213 C 3181 2 1N4148 D114 D214 C 3181 2 1N4148 D115 D215 C 3181 2 1N4148 D120 D220 C 3181 2 1N4148 D121 D221 C 3181 2 1N4148 D122 D222 C 3181 2 1N4148 D123 D223 C 5061 4 1N3070 NETWORK RESISTORS N100 N200 D 4669 4 Bal...

Страница 30: ...48 R248 A10266 2721 2 7K R149 R249 C 7781 5 200 OHM R150 R250 A10266 2721 2 7K R151 R251 A10266 1031 10K R152 R252 A10266 1231 12K R154 R254 A10266 1011 100 OHM R156 R256 A10266 1321 1 3K R157 R257 A10266 1321 1 3K R158 R258 A10266 9121 9 1K R159 R259 A10266 1031 10K R161 R261 A10266 4701 47 OHM R162 R262 A10266 4701 47 OHM R165 R265 A10265 53611 5 36K 1 R146 R246 A10265 53611 5 36K 1 R167 R267 A1...

Страница 31: ...0 OPEN C151 C251 OPEN C152 C252 C 6809 5 220pF C153 C253 C 5362 6 2 2uF DIODES D1 C 2851 1 1N4004 D2 C 2851 1 1N4004 D3 C 2851 1 1N4004 D4 C 2851 1 1N4004 D5 C 2851 1 1N4004 D6 C 2851 1 1N4004 D7 C 2851 1 1N4004 D104 D204 C 2851 1 1N4004 D105 D205 C 2851 1 1N4004 D106 D206 C 2851 1 1N4004 D107 D207 C 2851 1 1N4004 D108 D208 C 3181 2 1N4148 D109 D209 C 3181 2 1N4148 D110 D210 C 3181 2 1N4148 D111 D...

Страница 32: ...R138 R238 A10266 6821 6 8K R139 R239 A10266 1021 1K R140 R240 A10266 8201 82 OHM R141 R241 A10266 1541 150K R142 R242 A10266 1541 150K R146 R246 A10266 1031 10K R147 R247 C 7781 5 200 OHM R148 R248 A10266 2721 2 7K R149 R249 C 7781 5 200 OHM R150 R250 A10266 2721 2 7K R151 R251 A10266 1031 10K R152 R252 A10266 1231 12K R153 R253 C 5869 2 ZERO OHM R155 R255 OPEN R156 R256 A10266 1321 1 3K R157 R257...

Страница 33: ...UNTS U1 U2 2 C 1889 2 6 32 NUT 2 C 2176 3 6 32 X 5 SCREW 2 C 5341 0 HEATSINK 2 C 5594 4 STAR WASHER MOUNTS U104 U204 2 C 3450 1 14 PIN SOCKET COVERS FOR J100 J200 2 C 6778 2 Phone Jack Cover STRAIN RELIEF 4 C 1811 6 CABLE TIE Q42682 7 Main Module Parts List D 6910 0 Board ...

Страница 34: ...6810 3 180pF C 149 C249 C 6808 7 470pF C150 C250 OPEN C151 C251 OPEN C152 C252 C 6809 5 220pF C153 C253 C 6804 6 1uF DIODES D1 C 2851 1 1N4004 D2 C 2851 1 1N4004 D3 C 2851 1 1N4004 D4 C 2851 1 1N4004 D5 C 2851 1 1N4004 D6 C 2851 1 1N4004 D7 C 2851 1 1N4004 D8 C 3181 2 1N4148 D9 C 3549 0 1N916B 10V D104 D204 C 2851 1 1N4004 D105 D205 C 2851 1 1N4004 D106 D206 C 2851 1 1N4004 D107 D207 C 2851 1 1N40...

Страница 35: ...031 10K R129 R229 A10266 1041 100K R130 R230 A10266 1041 100K R131 R231 A10266 1031 10K R132 R232 C 5062 2 100K TRIMMER R133 R233 A10266 2741 270K R134 R234 A10266 1831 18K R135 R235 C 7782 3 100 OHM R136 R236 A10266 6821 6 8K R137 R237 C 7782 3 100 OHM R138 R238 A10266 6821 6 8K R139 R239 A10266 1021 1K R140 R240 A10266 8201 82 OHM R141 R241 A10266 1541 150K R142 R242 A10266 1541 150K R146 R246 A...

Страница 36: ...BON ASSY J600 J700 D 6620 5 6 RIBBON ASSY MISC BOARD D 7251 8 MOUNTS U1 U2 2 C 1889 2 6 32 NUT 2 C 2176 3 6 32 X 5 SCREW 2 C 5341 0 HEATSINK 2 C 5594 4 STAR WASHER MOUNTS U104 U204 2 C 3450 1 14 PIN SOCKET COVERS FOR J100 J200 2 C 6778 2 Phone Jack Cover STRAIN RELIEF 4 C 1811 6 CABLE TIE Note To use this module in the PB 1 it is necessary to remove R187 287 and install level control pots C 7409 3...

Страница 37: ...04 D2 C 2851 1 1N4004 D3 C 2851 1 1N4004 D4 C 2851 1 1N4004 D5 C 2851 1 1N4004 D6 C 2851 1 1N4004 D7 C 2851 1 1N4004 D8 C 3181 2 1N4148 D9 C 3549 0 1N916B 10V Zener D104 D204 C 2851 1 1N4004 D105 D205 C 2851 1 1N4004 D106 D206 C 2851 1 1N4004 D107 D207 C 2851 1 1N4004 D108 D208 C 3181 2 1N4148 D109 D209 C 3181 2 1N4148 D110 D210 C 3181 2 1N4148 D111 D211 C 5061 4 1N3070 D112 D212 C 3181 2 1N4148 D...

Страница 38: ...100K R130 R230 A10266 1041 100K R131 R231 A10266 1031 10K R132 R232 C 5062 2 100K Pot ODEP R133 R233 A10266 2741 270K R134 R234 A10266 1832 18K 5W R135 R235 A10266 1011 100 R136 R236 A10266 6821 6 8K R137 R237 A10266 1011 100 R138 R238 A10266 6821 6 8K R139 R239 A10266 1021 1K R140 R240 A10266 8201 82 R141 R241 A10266 1541 150K R142 R242 A10266 1541 150K R146 R246 A10266 1031 10K R147 R247 C 7781 ...

Страница 39: ... Sprdr C 6541 4 Washer C 8973 7 6 Split Screw C 9067 7 Stainless J1 C 7593 4 5 Pin Header J2 C 4508 5 16 Pin Socket J9 C 7527 2 6 Pin Header J10 C 7592 6 4 Pin Header J11 C 7526 4 3 Pin Header J100 J200 C 6777 4 Phone Jack Cover C 6778 2 Phone Jack Cover J500 J800 D 6619 7 10 Inch Ribbon J600 J700 D 6620 5 6 Inch Ribbon Q42953 2 Main Module Parts List D 7251 8 Board ...

Страница 40: ...10 3 180pF C149 C249 C 6808 7 470pF C150 C250 C 6806 1 01µF Q43060 5 Main Module Parts List D 7993 5 Board C151 C251 C 6806 1 01µF C152 C252 C 6950 7 82pF 5 C153 C253 C 8897 8 1µF C154 C254 C 8426 6 1µF 250V C155 C255 C 8897 8 1µF C156 C256 C 8897 8 1µF C157 C257 C 6806 1 01µF DIODES D1 C 2851 1 1N4004 D2 C 2851 1 1N4004 D3 C 2851 1 1N4004 D4 C 2851 1 1N4004 D5 C 2851 1 1N4004 D6 C 2851 1 1N4004 D...

Страница 41: ...132 R232 C 5062 2 100K Pot ODEP R133 R233 A10266 2741 270K R134 R234 A10266 1832 18K 5W R135 R235 C 7782 3 100 Flame Proof R136 R236 A10266 6821 6 8K R137 R237 C 7782 3 100 Flame Proof R138 R238 A10266 6821 6 8K R139 R239 A10266 8211 820 R140 R240 A10266 6801 68 R141 R241 A10266 1541 150K R142 R242 A10266 1541 150K R143 R243 A10266 1041 100K R144 R244 A10266 1041 100K R145 R245 A10266 1851 1 8M R1...

Страница 42: ... 10K R918 R1018 A10266 10021 10K R919 R1019 A10266 10021 10K R920 R1020 A10266 10021 10K R921 R1021 C 9079 2 200 Pot CMR Null SWITCHES S2 C 7325 1 Ground Lift S3 C 7960 5 Sensitivity S4 C 6781 6 Stereo Mono IC S U1 C 5095 2 UA7815 U2 C 5096 0 UA7915 U100 U200 C 6911 9 UPA75 U101 U201 C 4345 2 LM339 U102 U202 C 4345 2 LM339 U103 U203 C 6910 1 UPA76 U104 U204 C 7558 7 MC33079P MISC Board D 7993 5 So...

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