Table of Contents
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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 AMPLIFIER
SERIAL NO. XA1001 And Above
CONTENTS
SERVICE MANUAL
Serial Number XA1001 And Above
Power Supply Schematic and PCB ..................... 15 - 16
Input Schematic and PCB .................................. 17 - 18
Meter/Lighting Schematic and PCB .................... 19 - 21
Meter Led Schematic and PCB .......................... 21 - 22
Parts List ............................................................ 23 - 26
Exploded View and Parts List ............................. 27 - 32
Repacking Instructions ............................................. 33
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Table of Contents
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Summary of Contents for McIntosh MC252
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Page 1: Table Of Contents
POWER AMPLIFIER SERIAL NO. XA1001 And Above CONTENTS Performance Specifications ........2 Power Supply Schematic and PCB ..... 15 - 16 Notes ................. 2 Input Schematic and PCB ........17 - 18 Rear Panel ..............3 Meter/Lighting Schematic and PCB ....19 - 21 Section Location ............ -
Page 2: Performance Specifications
20Hz to 20,000Hz 240 Volts, 50/60Hz at 3.3 amps Total Harmonic Distortion Note: Refer to the rear panel of the MC252 for the correct voltage. Maximum Total Harmonic Distortion at any power level from 250 milliwatts to rated power output is 0.005% Overall Dimensions Width is 17-1/2 inches (44.45cm) -
Page 3: Rear Panel
MC252 TOP AND REAR PANEL... -
Page 4: Section Location
SECTION LOCATIONS TOP VIEW WITH COVER REMOVED BOTTOM VIEW WITH COVER REMOVED... -
Page 5: Block Diagram
MC252 BLOCK DIAGRAM... - Page 6 INTERCONNECT...
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Page 7: Driver Section
MC252 HEATSINK SCH 749986 DRIVER SECTION... -
Page 8: Heatsink Section
HEATSINK 2A 2B SCH 749986 HEATSINK SECTION... - Page 9 MC252 HEATSINK 2A 2B PCB 749986...
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Page 10: Power Supply
POWER SUPPLY SCH and PCB 749757... - Page 11 MC252 INPUT SCH and PCB 750304...
- Page 12 METER/LIGHTING SCH 749756...
- Page 13 MC252 METER/LIGHTING METER LED PCB 749756 SCH and PCB 749758...
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Page 14: Parts List
Ref. No. Description Part No. Ref. No. Description Part No. PARTS LIST LDR NETWORK 144179 RES MF 324 OHM 1% 1/4W 144597 PCB1 PC BD HEATSINK 129686 RES MF 2.21K 1% 1/4W 144584 TRANSISTOR PNP SILICON 132304 RES MF 22.1K 1% 1/4W 144564 INTERCONNECT TRANSISTOR NPN SILICON... - Page 15 MC252 Ref. No. Description Part No. PARTS LIST cont’d Ref. No. Description Part No. RES MF 20K 1% 1/4W 144524 TRANSISTOR NPN SILICON 132317 RES MF 20K 1% 1/4W 144524 TRANSISTOR NPN SILICON 132317 POWER SUPPLY 749757 (Cont’d) RES MF 3.32K 1% 1/4W...
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Page 16: Exploded View
EXPLODED VIEW... - Page 17 MC252 EXPLODED VIEW con’t...
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Page 18: Exploded View And Parts List
EXPLODED VIEW PARTS LIST Part Description 016469 GLASS CENTER PANEL 112087 SPACER PCB 1/4 016487 GLASS PANEL W/HOLE 414141 CLIP RIGHT ANGLE 018717 END CAP 401059 SCREW SM 6 X 5/8 PH PN TYPE A 018711 CENTER EXTRUSION 749986 ASSY HEATSINK PCB 018710 TOP/BOTTOM END CAP 005235... -
Page 19: Repacking Instructions
MC252 REPACKING INSTRUCTIONS... -
Page 20: Power Amplifier
SERIAL NO. XA1001 And Above The continuous improvement of its products is the policy of McIntosh Laboratory Incorporated, who reserve the right to improve design 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.
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