McIntosh-MC275_WV1536-pwr-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL Performance Specifications . 2 Notes . 2 Rear Panel . 3 Section Location . 4 Block Diagram . 5 Interconnection Diagram . 7 - 8 Amplifier Schematic and PCB. 9 - 12 Input Schematic and PCB . 13 - 14 Parts List . 15 - 16 Exploded View and Parts List . 17 - 18 Repacking Instructions . 19

2、CONTENTS STEREO POWER AMPLIFIER STARTING WITH SERIAL NO. WV1536 RadioFans.CN 收音机爱 好者资料库 PERFORMANCE SPECIFICATIONS 2 1. The heavy lines 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.

3、 AC input at 120 volts, 50/60Hz. b. All voltages are +/-10% with respect 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 boa

4、rd drawings, Square pad indicates: a. Polarized Capacitors - Positive b. 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 Power Output Stereo Minimum sine wave continuous aver

5、age power output per channel, both channels operating is: 75 watts into 4, 8 or 16 ohm load Power Output Mono (Parallel) Minimum sine wave continuous average power output is: 150 watts into 2 ohm, 4 ohm or 8 ohm load Output Load Impedance 4, 8, or 16 ohm (Stereo Mode) 2, 4, or 8 ohm (Mono Mode) Rate

6、d 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 0.5% Intermodulation Distortion Maximum Intermodulation Distortion if instantaneous peak output per channel does not exceed twice the rated output

7、, for any combination of frequencies from 20Hz to 20,000Hz, with both channels operating is 0.5% A-Weighted Signal To Noise Ratio 100dB Frequency Response +0, -0.5dB from 20Hz to 20,000Hz +0, -3dB from 10Hz to 70,000Hz Sensitivity 1.2 Volt unbalanced inputs 2.5 Volt balanced inputs Wide Band Damping

8、 Factor Greater than 14 Input Impedance 90,000 ohms unbalanced 180,000 balanced Tube Compliment 3 - 12AX7A Inputs and Phase Inverters 4 - 12AT7 Voltage Amplifier and Drivers 4 - KT88/6550 Power Output Power Requirements 100 Volts, 50/60Hz at 360 watts 110 Volts, 50/60Hz at 3.6 amps 120 Volts, 50/60H

9、z at 3.6 amps 220 Volts, 50/60Hz at 1.8 amps 230 Volts, 50/60Hz at 1.8 amps 240 Volts, 50/60Hz at 1.8 amps Note: Refer to the right side panel of the MC275 for the correct voltage. Overall Dimensions Width is 16-1/2 inches (41.91cm), Height is 8-1/4 inches (20.96cm) including feet, Depth is 12 inche

10、s (30.48cm) Weight 67 pounds (30.5kg) net, 75 pounds (34.lkg) in shipping carton RadioFans.CN 收音机爱 好者资料库 3 SECTION LOCATIONS BOTTOM VIEW WITH COVER REMOVED TOP VIEW WITH COVER REMOVED TERMINAL BLOCK AMPLIFIER PCB 2 INPUT PCB 3 KT88 (4X) OUTPUT TRANSFORMER 1 POWER TRANSFORMER 1 12AT7 12AT7 12AX7A 12A

11、X7A CHOKE FILTER MC275 RadioFans.CN 收音机爱 好者资料库 BLOCK DIAGRAM 4 56 MC275 INTERCONNECT1 78 AMPLIFIER 7506752A AMPLIFIER 7506752B 910 AMPLIFIER 7506752 MC275 11 INPUT 750082 3 12 13 PARTS LIST MC275 1 2 Ref. No. DescriptionPart No. INTERCONNECT F1FUSE 4A 250V SLO-BLO 5X20 IEC089135 L1CHOKE FILTER 0.5H

12、800MA SLOTS122379 RT1ASSEMBLY THERMISTOR CL-40 5R052008 S1CABLE ASSY PWR SWCH171729 T1POTTED TRANSFORMER POWER750086 T2POTTED TRANSFORMER OUTPUT750085 T3POTTED TRANSFORMER OUTPUT750085 750675 AMPLIFIER PCB C1CAP ELECT 47UF 450V066560 C2CAP MPF 0.1UF 630VDC064431 C3CAP MPF 0.1UF 630VDC064431 C4CAP EL

13、ECT 100UF 25V066573 C5CAP ELECT 100UF 25V066573 C6CAP MPF 0.1UF 5% 63VDC064325 C7CAP MPF 0.1UF 5% 63VDC064325 C8CAP MPF 0.1UF 5% 63VDC064325 C9CAP MPF 0.1UF 5% 63VDC064325 C10CAP ELECT 470UF 16V066508 C11CAP ELECT 470UF 16V066508 C12CAP PF 0.001UF 5% 63VDC064453 C13CAP PF 0.001UF 5% 63VDC064453 C14C

14、AP MPF 0.0022UF 5% 63VDC064454 C15CAP MPF 0.0022UF 5% 63VDC064454 C16CAP MPF 0.1UF 630VDC064431 C17CAP MPF 0.1UF 630VDC064431 C18CAP MPF 0.1UF 630VDC064431 C19CAP MPF 0.1UF 630VDC064431 C20CAP ELECT 470UF 50V066469 C21CAP ELECT 470UF 50V066469 C22CAP POLYPROP 0.22UF 20% 1KVDC064432 C23CAP POLYPROP 0

15、.22UF 20% 1KVDC064432 C24CAP POLYPROP 0.22UF 20% 1KVDC064432 C25CAP POLYPROP 0.22UF 20% 1KVDC064432 C26CAP POLY .047UF 10% 1000VDC064434 C27CAP POLYPROP .047UF 10% 250VDC064364 C28CAP ELECT 680UF 315V066549 C29CAP ELECT 680UF 315V066549 C30CAP ELECT 4700UF 35V066541 C31CAP ELECT 680UF 315V066549 C32

16、CAP ELECT 680UF 315V066549 C33CAP ELECT 47UF 450V066560 C34CAP ELECT 47UF 450V066560 C35CAP ELECT 47UF 450V066560 C36CAP MPF 0.22UF 5% 63VDC064329 C37CAP MPF 0.22UF 5% 63VDC064329 D1DIODE ZENER 200V 1.5W070177 D2DIODE ZENER 200V 1.5W070177 D3DIODE ZENER 200V 1.5W070177 D4DIODE ZENER 200V 1.5W070177

17、D5DIODE ZENER 200V 1.5W070177 D6DIODE ZENER 200V 1.5W070177 D7DIODE ZENER 200V 1.5W070177 D8DIODE ZENER 200V 1.5W070177 D9DIODE ZENER 200V 1.5W070177 D10DIODE BRIDGE RECT 1000V 6A070180 D11DIODE SIL 400 PIV 1.5A070031 D12DIODE SIL 400 PIV 1.5A070031 D13DIODE RECTIFIER070178 D14DIODE RECTIFIER070178

18、F1FUSE 2A 250V SLO-BLO 5X20 IEC089123 F2FUSE 2A 250V SLO-BLO 5X20 IEC089123 F3FUSE T8AL 250V SLO-BLO 5X20 IEC089134 F4FUSE T8AL 250V SLO-BLO 5X20 IEC089134 J1CONN MALE 6 POS FRICTION LOCK117218 J2CONN 3 POS MALE MTS100 NORMAL117214 J3CONN 3 POS MALE MTS100 NORMAL117214 J4BLADE FASTON W/FEET117708 J5

19、BLADE FASTON W/FEET117708 J6BLADE FASTON W/FEET117708 J7BLADE FASTON W/FEET117708 J8BLADE FASTON W/FEET117708 J9BLADE FASTON W/FEET117708 J10BLADE FASTON W/FEET117708 J11BLADE FASTON W/FEET117708 J12BLADE FASTON W/FEET117708 J13BLADE FASTON W/FEET117708 J14BLADE FASTON W/FEET117708 J15BLADE FASTON W

20、/FEET117708 J16BLADE FASTON W/FEET117708 J17BLADE FASTON W/FEET117708 J18BLADE FASTON W/FEET117708 J19BLADE FASTON .187117726 J20BLADE FASTON .187117726 J21BLADE FASTON W/FEET117708 J22BLADE FASTON W/FEET117708 J23BLADE FASTON W/FEET117708 J24BLADE FASTON W/FEET117708 J25BLADE FASTON W/FEET117708 J2

21、6BLADE FASTON W/FEET117708 J27BLADE FASTON W/FEET117708 J28BLADE FASTON W/FEET117708 J29BLADE FASTON W/FEET117708 J30BLADE FASTON W/FEET117708 J31BLADE FASTON W/FEET117708 J32BLADE FASTON W/FEET117708 L1CHOKE 2.2 UH122405 L2CHOKE 2.2 UH122405 L3CHOKE 2.2 UH122405 L4CHOKE 2.2 UH122405 R1RES MF 1M 1%

22、1/4W144577 R2RES MF 1M 1% 1/4W144577 R3RES MF 221K 1% 1/4W144629 R4RES MO 100K 5% 2W144698 R5RES MO 100K 5% 2W144698 R6RES MF 221K 1% 1/4W144629 R7RES MF 221K 1% 1/4W144629 R8RES MF 221K 1% 1/4W144629 R9RES MF 1K 1% 1/4W144513 R10RES MF 1K 1% 1/4W144513 R11RES MF 100K 1% 1/2W144635 R12RES MF 100K 1%

23、 1/2W144635 R13RES MF 1M 1% 1/4W144577 R14RES MF 1M 1% 1/4W144577 R15RES MF 1M 1% 1/4W144577 R16RES MF 1M 1% 1/4W144577 R17RES MF 10K 1% 1/4W144504 R18RES MF 10K 1% 1/4W144504 R19RES MF 10K 1% 1/4W144504 R20RES MF 10K 1% 1/4W144504 R21RES MF 100 OHM 1% 1/4W144568 R22RES MF 100 OHM 1% 1/4W144568 Ref.

24、 No. DescriptionPart No. 14 PARTS LIST cont 3 R23RES MF 100 OHM 1% 1/4W144568 R24RES MF 100 OHM 1% 1/4W144568 R25RES MF 8.25K 1% 1/4W144549 R26RES MF 8.25K 1% 1/4W144549 R27RES MF 121K OHM 1% 1/2W144588 R28RES MF 121K OHM 1% 1/2W144588 R29RES MF 121K OHM 1% 1/2W144588 R30RES MF 121K OHM 1% 1/2W14458

25、8 R31RES 698 OHM 1% 1/4W144511 R32RES 698 OHM 1% 1/4W144511 R33RES 698 OHM 1% 1/4W144511 R34RES 698 OHM 1% 1/4W144511 R35RES MF 2.21M 1% 1/4W144576 R36RES MF 2.21M 1% 1/4W144576 R37RES MF 2.21M 1% 1/4W144576 R38RES MF 2.21M 1% 1/4W144576 R39RES MF 221K 1% 1/4W144629 R40RES MF 221K 1% 1/4W144629 R41R

26、ES MF 221K 1% 1/4W144629 R42RES MF 221K 1% 1/4W144629 R43RES MF 10K 1% 1/4W144504 R44RES MF 10K 1% 1/4W144504 R45RES MF 10K 1% 1/4W144504 R46RES MF 10K 1% 1/4W144504 R47RES MO 46.4K 1% 1W144637 R48RES MO 46.4K 1% 1W144637 R49RES MO 46.4K 1% 1W144637 R50RES MO 46.4K 1% 1W144637 R51RES MF 90.9K 1% 1/4

27、W144557 R52RES MF 90.9K 1% 1/4W144557 R53RES MF 1M 1% 1/4W144577 R54RES MF 1M 1% 1/4W144577 R55RES MF 1M 1% 1/4W144577 R56RES MF 1M 1% 1/4W144577 R57RES MF 200K 1% 1/4W144531 R58RES MF 200K 1% 1/4W144531 R59RES MF 200K 1% 1/4W144531 R60RES MF 200K 1% 1/4W144531 R61RES MO 100K 5% 2W144698 R62RES MO 1

28、00K 5% 2W144698 R63RES MO 100K 5% 2W144698 R64RES MO 100K 5% 2W144698 R65RES MO 100K 5% 2W144698 R66RES MO 100K 5% 2W144698 R67RES MO 100K 5% 2W144698 R68RES MO 100K 5% 2W144698 R69RES WW 220 OHM 10% 5W139256 R70RES WW 220 OHM 10% 5W139256 R71RES WW 220 OHM 10% 5W139256 R72RES WW 220 OHM 10% 5W13925

29、6 R73RES MO 10K 5% 2W144638 R74RES MO 2.2K 5% 2W144666 R75RES MO 100K 5% 2W144698 R76RES MO 100K 5% 2W144698 (F1)HOLDER FUSE 5X20MM PCB MOUNT178159 (F2)HOLDER FUSE 5X20MM PCB MOUNT178159 (F3)HOLDER FUSE 5X20MM PCB MOUNT178159 (F4)HOLDER FUSE 5X20MM PCB MOUNT178159 (V1)SOCKET 9 PIN TUBE CERAMIC178170

30、 (V2)SOCKET 9 PIN TUBE CERAMIC178170 (V3)SOCKET 9 PIN TUBE CERAMIC178170 (V4)SOCKET 9 PIN TUBE CERAMIC178170 (V5)SOCKET 9 PIN TUBE CERAMIC178170 (V6)SOCKET 9 PIN TUBE CERAMIC178170 (V7)SOCKET 9 PIN TUBE CERAMIC178170 (V8)SOCKET OCTAL TUBE CERAMIC178169 (V9)SOCKET OCTAL TUBE CERAMIC178169 (V10)SOCKET

31、 OCTAL TUBE CERAMIC178169 (V11)SOCKET OCTAL TUBE CERAMIC178169 750082 INPUT PCB J1JACK PHONO GOLD117862 J2XLR FEMALE HORIZ PCB WITH LATCH117814 J3XLR FEMALE HORIZ PCB WITH LATCH117814 J4CONN 3 POS MALE MTS100 NORMAL117214 J5CONN 3 POS MALE MTS100 NORMAL117214 J6CONN MALE 6 POS FRICTION LOCK117218 R1

32、RES MF 221K 1% 1/4W144629 R2RES MF 100K 1% 1/4W144528 R3RES MF 221K 1% 1/4W144629 R4RES MF 100K 1% 1/4W144528 S1SWITCH SLIDE DPDT148076 S2SWITCH SLIDE DPDT148076 Ref. No. DescriptionPart No.Ref. No. DescriptionPart No. 1516 EXPLODED VIEW and PARTS LIST 1005653CHASSIS 2005650RCA SPACER 3101197SCREW H

33、I/LO 4-24 X 3/8 PH RD BLK 4404007WASHER LOCK 6 X .288 INT STAR 5104165WASHER 3/8 INTERNAL TOOTH GOLD 6402003NUT KEP 6-32 7750082ASSY INPUT PCB 8084219POST BINDING DUAL 4MM THREAD 9404198LOCK WASHER 10410015NUT M4 INT STAR SS 12171729CABLE ASSY POWER SWITCH 13104165WASHER 3/8 INT TOOTH GOLD 19400157S

34、CREW MACH 6-32 X 1/4 PH PN 20114012BALL STUD 21165065TUBE 12AX7A McINTOSH 22165067TUBE 12AT7 23165070TUBE KT88 WITH McINTOSH LOGO 24017761AIR PIPE 25400292SCREW MACH 6-32 X 3/8 PH FH BLK 26750085POTTED TRANSFORMER OUTPUT 27750086POTTED TRANSFORMER POWER 28166126DECAL OUTPUT TRANSFORMER 29166127DECAL

35、 POWER TRANSFORMER 30005651TUBE COVER 31017862PUSH-ON FOOT 32125667NAMEPLATE 33106012SPRING CLIP: PUSH-ON 35017452KLIP WIRE 36178161HOLDER FUSE 5 X 20mm IEC 37404016WASHER INT STAR .5 X .630 X .022 38102006NUT MACH 10-32 W/LOCK 39078024GROMMET RUBBER 1” ID 40078025GROMMET RUBBER 3/4” ID 41017859SPAC

36、ER NYLON 6-32 X 7/16 42117487RECEPTACLE AC LINE 43074091TERMINAL BLOCK AC Ref. No.DescriptionPart No. 44404001WASHER FLAT STEEL 4 X 9/32 X .025 45402022NUT MACH 4-40 X 3/16 X 1/16 46122379CHOKE FILTER 47402005NUT MACH 8-32 W/LOCK 48005425SUPPORT BRACKET 49750675ASSY AMPLIFIER PCB 50005426BOTTOM COVE

37、R 51401078SCREW TAP 8-32 X 5/16 PH PN BLK 52017542PLASTIC FOOT 53400153SCREW MACH 8-32 X 1/2 PH PN 54401109SCREW TT 6-32 X 5/16 PH PN BLK MC275 REPACKING INSTRUCTIONS 17 The continuous improvement of its products is the policy of McIntosh Laboratory Incorporated, who reserve the right to improve des

38、ign without notice. Because of the constant upgrading of McIntosh products circuitry and components, the Company cannot insure, and does not warrant, the accuracy of the within schematic material, which is intended for information only. McINTOSH LABORATORY, INC., 2 CHAMBERS STREET, BINGHAMTON, NEW YORK 13903 Printed in U.S.A. Part Number 041046 STEREO POWER AMPLIFIER SERVICE MANUAL STARTING WITH SERIAL NO. WV1536 MC275