McIntosh-MC252-pwr-sm维修电路原理图.pdf

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1、SERVICE MANUAL Performance Specifications . 2 Notes . 2 Rear Panel . 3 Section Location . 4 Block Diagram . 5 - 6 Interconnection Diagram . 7 - 8 Heatsink Schematic and PCB . 9 - 14 Power Supply Schematic and PCB. 15 - 16 Input Schematic and PCB. 17 - 18 Meter/Lighting Schematic and PCB. 19 - 21 Met

2、er Led Schematic and PCB . 21 - 22 Parts List . 23 - 26 Exploded View and Parts List . 27 - 32 Repacking Instructions . 33 CONTENTS POWER AMPLIFIER RadioFans.CN 收音机爱好者资料库 PERFORMANCE SPECIFICATIONS Power Output Stereo 250 watts into a 2, 4 or 8 ohm load is the minimum sine wave continuous average p

3、ower per channel with both channels operating Power Output Mono Bridged 500 watts into a 4, 8 or 16 ohm load is the minimum sine wave continuous average power output Power Output Mono Bi-Amp 500 watts into a 1, 2 or 4 ohm load is the minimum sine wave continuous average power output Output Load Impe

4、dance Stereo:2, 4 or 8 ohms Mono:1, 2, 4, 8, or 16 ohms Rated Power Band 20Hz to 20,000Hz Total Harmonic Distortion Maximum Total Harmonic Distortion at any power level from 250 milliwatts to rated power output is 0.005% Intermodulation Distortion Maximum Intermodulation Distortion if instantaneous

5、peak output per channel does not exceed twice the rated output, for any combination of frequencies from 20Hz to 20,000Hz, with all channels operating is 0.005% Dynamic Headroom 2.0dB Frequency Response +0, -0.25dB from 20Hz to 20,000Hz +0, -3dB from 10Hz to 100,000Hz Sensitivity 1.6 Volts Unbalanced

6、 Input 3.2 Volts Balanced Input A-Weighted Signal To Noise Ratio 112dB below rated output Input Impedance 10,000 ohms Wide Band Damping Factor Greater than 40 Power Requirements 100 Volts, 50/60Hz at 8 amps 110 Volts, 50/60Hz at 7.2 amps 120 Volts, 50/60Hz at 6.6 amps 220 Volts, 50/60Hz at 3.3 amps

7、230 Volts, 50/60Hz at 3.3 amps 240 Volts, 50/60Hz at 3.3 amps Note: Refer to the rear panel of the MC252 for the correct voltage. Overall Dimensions 17-1/2 inches (44.45cm) W, 9-7/16 inches (23.97cm) H, 14-3/4 inches (37.5cm) D, including clearance for connec- tors Weight 94.5 pounds (207.9kg) net,

8、108.5 pounds (238.7kg) in shipping carton 2 1. The heavy notes on the schematic denote the primary signal path. 2. Unless otherwise noted, all voltages indicated on the schematics are measured under the following conditions: a. AC input at 120 volts, 50/60Hz. b. All voltages are +/-10% with respect

9、to ground. A high impedance (10 megaohm) voltmeter must be used. 3. Unless otherwise specified: a. Resistor values are in ohms. b. Capacitor values are microfarads (uF). c. Inductor values are in microhenries (uH). 4. On PC board drawings, Square pad indicates: a. Polarized Capacitors - Positive b.

10、Diodes - Cathode c. Others - Pin 1 5. WARNING Parts marked with the symbol have critical characteristics. Use only replacement parts recom- mended by the manufacturer. NOTES RadioFans.CN 收音机爱好者资料库 3 MC252 TOP AND REAR PANEL RadioFans.CN 收音机爱好者资料库 4 SECTION LOCATIONS TOP VIEW WITH COVER REMOVED BOT

11、TOM VIEW WITH COVER REMOVED RadioFans.CN 收音机爱好者资料库 56 BLOCK DIAGRAM MC252 RadioFans.CN 收音机爱好者资料库 78 INTERCONNECT1 RadioFans.CN 收音机爱好者资料库 HEATSINK 0499862A MC252 910 2B DRIVER SECTION RadioFans.CN 收音机爱好者资料库 1112 HEATSINK 0499862A 2B HEATSINK SECTION RadioFans.CN 收音机爱好者资料库 1314 MC252 HEATSINK 049

12、9862A 2B RadioFans.CN 收音机爱好者资料库 POWER SUPPLY 0497573 1516 RadioFans.CN 收音机爱好者资料库 1718 INPUT 0497554 MC252 RadioFans.CN 收音机爱好者资料库 1920 METER/LIGHTING 0497565 RadioFans.CN 收音机爱好者资料库 2122 METER/LIGHTING 0497565 MC252 METER LED 0497586 RadioFans.CN 收音机爱好者资料库 PARTS LIST 2324 Ref. No.DescriptionPart

13、No. 1 2B2A 3 INTERCONNECT BP1Binding Post BLK117741 BP2Binding Post RED117741 BP3Binding Post RED117741 BP4Binding Post RED117741 BP5Binding Post RED117741 BP6Binding Post RED117741 BP7Binding Post RED117741 BP8Binding Post BLK117741 D1Diode Bridge Rectifier070139 F1Fuse089105 J1Receptacle, AC Line1

14、17487 MT1Meter124084 MT2Meter124084 RT1Thermistor Assembly052008 RT2Thermistor Assembly052008 S1Switch146243 S2Switch146243 T1Power Transformer049763 T2Output Transformer049766 T3Output Transformer049766 TB1Terminal Block AC074091 049986 HEATSINK C1CAP DISC MONO .47UF 50V061249 C2CAP MONO .1uF 50V 2

15、0% Z5U061305 C3CAP MONO .1uF 50V 20% Z5U061305 C4CAP ELECT 47UF 35V066446 C5CAP ELECT 10UF 100VDC066462 C6CAP ELECT 10UF 100VDC066462 C7CAP MONO .1uF 50V 20% Z5U061305 C8CAP MONO .1uF 50V 20% Z5U061305 C9CAP MONO 220PF 100V 10PO061301 C10CAP MONO 100PF 100V 10% NPO061300 C11CAP MONO 100PF 100V 10% N

16、PO061300 C12CAP ELECT 220UF 25V066507 C13CAP MPF 0.0047UF 5VDC064308 C14CAP POLYPROP 0.15UF 10VDC064363 C15CAP POLYPROP .047UF 10VDC064364 C16CAP ELECT 10UF 100VDC066462 C17CAP ELECT 10UF 100VDC066462 C18CAP MONO .01UF 50V 20% X7R061304 C19CAP ELECT 47UF 35V066446 C20CAP ELECT 47UF 35V066446 C21CAP

17、MONO .01UF 50V 20% X7R061304 C22CAP MONO .1uF 50V 20% Z5U061305 C23CAP MONO 100PF 100V 10PO061300 C24CAP MONO 100PF 100V 10% NPO061300 C25CAP MONO .1uF 50V 20% Z5U061305 C26CAP MPF 0.47UF 5/100VDC064442 C27CAP MPF 0.47UF 5/100VDC064442 D1DIODE SILICON070047 D2DIODE SILICON070047 D3DIODE SILICON07004

18、7 D4DIODE SILICON 070047 D5DIODE SILICON070047 D6DIODE 200V 3A070126 D7DIODE 200V 3A070126 J1CONN MALE 9 POS FRICTION LK117244 J2CONN MALE 9 POS FRICTION LK117244 J3CONN HEADER 2 PIN 0.156117404 J4BLADE FASTON W/FEET117708 J5CONN 4 PIN117215 J7BLADE FASTON W/FEET117708 J8CONN 2 PIN MALE117213 J9BLAD

19、E FASTON W/FEET117708 LD1LDR NETWORK VTL5C9144179 Q1TRANSISTOR PNP132224 Q2TRANSISTOR NPN132223 Q3TRANSISTOR NPN132223 Q4TRANSISTOR N JFET132222 Q5TRANSISTOR N JFET132222 Q6TRANSISTOR N JFET132222 Q7TRANSISTOR NPN POWER132255 Q8TRANSISTOR SI NPN 25V132254 Q9TRANSISTOR NPN POWER132255 Q10TRANSISTOR P

20、NP132224 Q11TRANSISTOR NPN POWER132255 Q12TRANSISTOR SI NPN 25V132254 Q13TRANSISTOR NPN132223 Q14TRANSISTOR SI NPN 25V132254 Q15TRANSISTOR NPN132223 Q16TRANSISTOR PNP132224 Q17TRANSISTOR NPN 25C3334C132285 Q18TRANSISTOR PNP 2SA32IC132286 Q19TRANSISTOR NPN SILICON132171 Q20TRANSISTOR PNP SILICON13217

21、2 Q21TRANSISTOR NPN132223 Q22TRANSISTOR NPN 25C3334C132285 Q23TRANSISTOR PNP 2SA32IC132286 Q24TRANSISTOR NPN132268 Q25TRANSISTOR PNP132267 Q26TRANSISTOR NPN POW 2SC5200132291 Q27TRANSISTOR PNP POW 2SA1943132292 Q28TRANSISTOR NPN POW 2SC5200132291 Q29TRANSISTOR PNP POW 2SA1943132292 Q30TRANSISTOR NPN

22、 POW 2SC5200132291 Q31TRANSISTOR PNP POW 2SA1943132292 Q32TRANSISTOR NPN POW 2SC5200132291 Q33TRANSISTOR PNP POW 2SA1943132292 Q34TRANSISTOR NPN POW 2SC5200132291 Q35TRANSISTOR PNP POW 2SA1943132292 R1RES MF 10 OHM 1% 1/4W144157 R2RES MF 10 OHM 1/4W144157 R3RES MF 4.75K 1% 1/4W 144097 R4RES MF 100 O

23、HM 1% 1/4W144196 R5RES MF 475 OHM 1% 1/4W144086 R6RES MF 22.1K 1% 1/4W144187 R7RES MF 10M 1% 1/4W144264 R8RES MF 267K 1% 1/4W144118 R9RES MF 2.21K 1% 1/4W144298 R10RES MF 221 OHM 1% 1/4W144172 R11RES MF 267K 1% 1/4W144118 R12RES MF 47.5K 1% 1/4W144108 R13RES MF 47.5K 1/4W144108 R14RES MF 3.32K 1% 1/

24、4W144095 R15RES MF 221 OHM 1% 1/4W144172 R16RES MF 1K 1% 1/4W144090 R17RES MF 221 OHM 1% 1/4W144172 R18RES MF 3.32K 1/4W144095 R19RES MF 221 OHM 1% 1/4W144172 R20RES MF 1K 1% 1/4W144090 R21RES MF 221 OHM 1% 1/4W144172 R22RES MF 499 OHM 1% 1/4W144087 R23RES MF 267K 1% 1/4W144118 R24RES MF 187K 1% 1/4

25、W144406 R25RES MF 324 OHM 1% 1/4W144338 R26RES MF 324 OHM 1% 1/4W144338 R27RES MF 6.49K .5% 1/4W144401 R28RES MF 13.7K 1% 1/4W144342 R29RES MF 221 OHM 1/4W144172 R30RES WW 2 OHM 10% 5W139005 R31RES WW 4 OHM 5W139119 R32RES FP 22 OHM 1/4W 5137033 R33RES FP 22 OHM 1/4W 5137033 R34RES MF 324 OHM 1/4W14

26、4338 R35RES MF 324 OHM 1/4W144338 R36RES MF 2.21K 1/4W144298 R37RES MF 22.1K 1/4W144187 R39RES MF 22.1K 1/4W144187 R40RES MET OX 680 OHM 5% .5W137093 R41RES MET OX 680 OHM 5% .5W137093 R42RES MF 1.82K 1% 1/4W144296 R43RES MET OX 430 OHM 5% .5W137095 R44POT TRIM 200 OHM 20% HORIZ AD134390 R45RES MF 1

27、.82K 1% 1/4W144296 R46RES MET OX 47 OHM 5% .5W137096 R47RES WW DUAL .47 OHM 5% 5W139199 R48RES WW DUAL .47 OHM 5% 5W139199 R49RES WW DUAL .47 OHM 5% 5W139199 R50RES WW DUAL .47 OHM 5% 5W139199 R51RES WW DUAL .47 OHM 5W139199 R52RES MF 1K 1% 1/4W144090 R53RES MF 1K 1% 1/4W144090 R54RES WW DUAL .47 OH

28、M 5W139199 R55RES WW DUAL .47 OHM 5% 5W 139199 R56RES WW DUAL .47 OHM 5% 5W139199 RT1SENSOR THERMAL144249 U1IC OPAMP NE4558N133028 049757 POWER SUPPLY C1CAP POLY .047UF 10% 250VDC064364 C2CAP ELECT 10UF 50V066445 C327000uF 100V ELECTROLYTIC066489 C427000uF 100V ELECTROLYTIC066489 C5CAP ELECT 22UF 10

29、0V066506 C6CAP ELECT 3300UF 35V066509 C7CAP ELECT 3300UF 35V066509 C8CAP ELECT 4.7UF 50V066512 C9CAP ELECT 10UF 100VDC066462 D1DIODE RECTIFIER070131 D2DIODE RECTIFIER070131 D3DIODE RECTIFIER070131 D4DIODE RECTIFIER070131 D5DIODE RECTIFIER070131 D6DIODE RECTIFIER070131 D7DIODE SILICON070047 HS1HEATSI

30、NK T0220080014 HS2HEATSINK T0220080014 J1BLADE FASTON W/FEET117708 J2BLADE FASTON W/FEET117708 J3BLADE FASTON W/FEET117708 J4BLADE FASTON W/FEET117708 J5BLADE FASTON W/FEET117708 J6BLADE FASTON W/FEET117708 J7CONN MALE 7 PIN117217 J8CONN 4 PIN117215 J9BLADE FASTON W/FEET117708 J11CONN HEADER 2 PIN 0

31、.156117404 J12CONN HEADER 2 PIN 0.156117404 J13BLADE FASTON W/FEET117708 J14CONN MALE 9 POS FRICTION LK117244 J15CONN MALE 9 POS FRICTION LK117244 J16CONN MALE 9 POS FRICTION LK117244 J17BLADE FASTON W/FEET117708 J18BLADE FASTON W/FEET117708 K1RELAY 48V 18.8mA87052 Q1TRIAC DRIV OPTOCPLR 600V131022 Q

32、2TRANSISTOR NPN132223 Q3TRANSISTOR PNP132224 RadioFans.CN 收音机爱好者资料库 2526 PARTS LIST cont 5 4 6 MC252 Q4TRANSISTOR NPN132223 Q5TRANSISTOR PNP132224 Q6TRANSISTOR P CHAN JUNC FET132226 Q7TRANSISTOR PNP132224 R1RES MF 33.2K 1% 1/4W144015 R2RES MF 33.2K 1% 1/4W144015 R3RES MF 2.74M 1/4W144271 R4RES WW 1

33、.5K 10% 5W139079 R5RES MF 1.1K 1% 1/4W144091 R6RES MF 22.1K 1% 1/4W144187 R7RES MF 1M 1/4W144269 R8RES MF 12.1K 1% 1/4W144154 R9RES MF 2.1K 1% 1/4W144299 R10RES MF 12.1K 1% 1/4W144154 R11RES MF 3.32K 1% 1/4W144095 R12RES MF 20K 1% 1/4W144104 R13RES MF 2.1K 1% 1/4W144299 R14RES MF 150K 1% 1/4W144419

34、R15RES WW 2.7 OHM 10W139173 R16RES WW 2.7 OHM 10W139173 SP1BRACKET PCB CARD MOUNTING003611 SP2BRACKET PCB CARD MOUNTING003611 SP3BRACKET PCB CARD MOUNTING003611 SP4BRACKET PCB CARD MOUNTING003611 U1IC REGULATOR 15V133154 U2IC REGULATOR -15V133153 049755 INPUT C1CAP ELECT 10UF 50V066445 C2CAP ELECT 1

35、0UF 50V066445 C3CAP ELECT 10UF 50V066445 C4CAP ELECT 10UF 50V066445 C5CAP MONO 47PF 200V 10% NPO061299 C6CAP MONO 22PF 200V 10% NPO061298 C7CAP MONO 47PF 200V 10% NPO061299 C8CAP MONO 22PF 200V 10% NPO061298 C9CAP MONO 22PF 200V 10% NPO061298 C10CAP MONO 22PF 200V 10% NPO061298 C11CAP MONO .1uF 50V

36、20% Z5U061305 C12CAP ELECT 10UF 50V066445 C13CAP MPF 0.22UF 5% 63VDC064329 C14CAP MONO .1uF 50V 20% Z5U061305 C15CAP MONO .1uF 50V 20% Z5U061305 J1XLR FEM HORIZ PCB WITH LATCH117814 J2XLR FEM HORIZ PCB WITH LATCH117814 J3JACK PHONO GOLD PJ261G117436 J4JACK HEADPHONE DUAL BLK 1/8117825 J5CONN MALE 9

37、POS FRICTION LK117244 J6CONN MALE 9 POS FRICTION LK117244 R1RES MF 20K 1% 1/4W144104 R2RES MF 20K 1% 1/4W144104 R3RES MF 20K 1% 1/4W144104 R4RES MF 20K 1% 1/4W144104 R5RES MF 20K 1% 1/4W 144104 R6RES MF 20K 1% 1/4W144104 R7RES MF 20K 1% 1/4W144104 R8RES MF 20K 1% 1/4W144104 R9RES MF 40.2K 1% 1/4W144

38、107 R10RES MF 40.2K 1% 1/4W144107 R11RES MF 20K 1% 1/4W144104 R12RES MF 40.2K 1% 1/4W144107 R13RES MF 1K 1% 1/4W144090 R14RES MF 20K 1% 1/4W144104 R15RES MF 1K 1% 1/4W144090 R16RES MF 40.2K 1% 1/4W144107 R17RES MF 20K 1% 1/4W144104 R18RES MF 20K 1% 1/4W144104 R19RES MF 3.32K 1% 1/4W144095 R20RES MF

39、3.32K 1% 1/4W144095 R21RES MF 20K 1% 1/4W144104 R22RES MF 100 OHM 1% 1/4W144196 R23RES MF 68.1 OHM 1% 1/4W144082 R24RES MF 1M 1/4W144269 R25RES MF 20K 1% 1/4W144104 R26RES MF 10 OHM 1% 1/4W144157 R27RES MF 10 OHM 1% 1/4W144157 S1JSA4320-0201148069 SP1BRACKET PCB CARD MOUNTING003611 U1IC OPAMP NE4558

40、N133028 U2IC NAND SCHMIT 2-IN X 4133192 U3IC REGULATOR +5 VOLT133093 049756 METER/LIGHTING C4CAP MONO .1uF 50V 20% Z5U061305 C5CAP MONO .1uF 50V 20% Z5U061305 C8CAP MPF 0.22UF 5% 63VDC064329 C9CAP MPF 0.1UF 100V064337 C10CAP ELECT 10UF 50V066445 C11CAP MONO .1uF 50V 20% Z5U061305 C12CAP MONO .1uF 50

41、V 20% Z5U061305 C13CAP MPF 0.22UF 5% 63VDC064329 C14CAP MPF 0.1UF 100V064337 C15CAP ELECT 10UF 50V066445 D1DIODE ZENER 8.2V 1/2W070130 D9LED AMBER058133 D13LED AMBER058133 D14DIODE SILICON070047 D15DIODE SILICON070047 D16DIODE SILICON070047 D17DIODE SILICON070047 D18DIODE SILICON070047 D19DIODE SILI

42、CON070047 D20DIODE SILICON070047 D21DIODE SILICON070047 D22DIODE SILICON070047 D23DIODE SILICON070047 D24DIODE SILICON 070047 D25DIODE SILICON070047 DS5LED GREEN 5MM HI-INTENSITY058165 DS6LED GREEN 5MM HI-INTENSITY058165 DS7LED GREEN 5MM HI-INTENSITY058165 DS8LED SQUARE RED058109 J1CONN MALE 9 POS F

43、RICTION LK117244 J2CONN 4 PIN117215 J3CONN 3 POS MLE MTS100 NORM117214 J4HEADER 2 PIN LATCHING117766 J5CONN 4 PIN117215 J6HEADER 2 PIN LATCHING117766 Q1TRANSISTOR NPN132223 Q2TRANSISTOR NPN132223 Q3TRANSISTOR NPN132223 Q4TRANSISTOR NPN132223 Q8TRANSISTOR NPN132223 Q9TRANSISTOR NPN132223 Q10TRANSISTO

44、R NPN132223 Q11TRANSISTOR NPN132223 Q12TRANSISTOR NPN132223 Q13TRANSISTOR NPN132223 Q14TRANSISTOR NPN132223 Q15TRANSISTOR NPN132223 R6RES MF 187K 1% 1/4W144406 R8RES MF 12.1K 1% 1/4W144154 R9RES MF 475K 1% 1/4W144364 R11RES MF 4.75K 1% 1/4W144097 R13RES MF 681 OHM 1% 1/4W144195 R18RES MF 12.1K 1% 1/

45、4W144154 R19RES MF 4.75K 1% 1/4W144097 R28RES MF 562 OHM 1/4W144408 R29RES MF 806 OHM 1/4W144089 R37RES MF 187K 1% 1/4W144406 R38RES MF 681 OHM 1% 1/4W144195 R39RES MF 475K 1% 1/4W144364 R40RES MF 200K 1/4W144117 R41RES MF 10.2K 1% 1/4W144130 R42RES MF 10M 1% 1/4W144264 R43RES MF 2.21M 1/4W144265 R4

46、4RES MF 100 OHM 1% 1/4W144196 R45RES MF 187K 1% 1/4W144406 R46RES MF 1.21K 1% 1/4W144191 R47RES 82.5K 1/4W144112 R48POT TRIM 100K OHM 20%134383 R49RES MF 221K 1% 1/4W144421 R50RES MF 6.81K 1/4W144297 R51RES MF 100 OHM 1% 1/4W144196 R53RES MF 200K 1/4W144117 R54RES MF 10.2K 1% 1/4W144130 R55RES MF 10

47、M 1% 1/4W144264 R56RES 82.5K 1/4W 144112 R57RES MF 2.21M 1/4W144265 R58RES MF 187K 1% 1/4W144406 R59RES MF 6.81K 1/4W144297 R60POT TRIM 100K OHM 20%134383 R61RES MF 1.21K 1% 1/4W144191 U1IC DUAL OPERATIONAL AMP133260 U2IC DUAL OPERATIONAL AMP133260 049758 METER LED DS1LED BLUE 5MM HI-INTENSITY058166

48、 DS2LED BLUE 5MM HI-INTENSITY058166 DS3LED GREEN 5MM HI-INTENSITY058165 DS4LED GREEN 5MM HI-INTENSITY058165 DS5LED BLUE 5MM HI-INTENSITY058166 DS6LED BLUE 5MM HI-INTENSITY058166 DS7LED GREEN 5MM HI-INTENSITY058165 DS8LED GREEN 5MM HI-INTENSITY058165 J1CONN 4 PIN RIGHT ANGLE117240 R1RES MF 221 OHM 1% 1/4