McIntosh-C22-CE-Service-Manual 电路图 维修手册.pdf

《McIntosh-C22-CE-Service-Manual 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《McIntosh-C22-CE-Service-Manual 电路图 维修手册.pdf（15页珍藏版）》请在收音机爱好者资料库上搜索。

1、Mclntosh Laboratory, Inc. 2 Chambers Street, Binghamton, New York 13903 Printed CONTENTS Performance Specifications 3 Notes 3 Rear Panel 4 Front Panel and Trim Parts List 4 Section Locations 5-6 Block Diagram 5-6 Interconnection Diagram 6-9 Input/Output (Left and Right) 10-12 Amplifier 11-14 Control

2、 and Balance Control 14-18 Treble 19 Bass 20 Speaker Switch 21 AC Power Supply 22 DC Power Supply 23 Repacking Instructions 24 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 Performance Specifications FREQUENCY RESPONSE + 0, -0.5dB from 20Hz to 20,000Hz RATED OUTPUT 2.5V at MAIN and SWITCHED 1 and

3、2, and BALANCED OUTPUTS MAXIMUM VOLTAGE OUTPUT More than 8V at all outputs TOTAL HARMONIC DISTORTION 0.002% maximum IHF, 0.2% maximum from 20Hz to 20,000Hz at rated output SENSITIVITY Phono: 2.2mV for 2.5V rated output, (0.45mV IHF) High Level: 250mV for 2.5V rated output, (50mV IHF) SIGNAL-TO-NOISE

4、 RATIO, A-WEIGHTED Phono: 80dB below 10mV input High Level: 90dB below rated output VOLTAGE GAIN Phono To Tape: 41 dB at 1000Hz Phono To Main: 61 dB at 1000Hz High Level To Tape: 0dB High Level To Main: 20dB INPUT IMPEDANCE Phono: 47K ohms and 65pF Capacitance High Level: 22K ohms TONE CONTROLS Bass

5、 and Treble stepped, 20dB boost to 20dB cut AC POWER OUTLETS 4 switched and 1 unswitched, Total capacity 1400 watts POWER REQUIREMENTS 120V, 50/60Hz, 37 watts DIMENSIONS Front Panel: 16 inches (40.6cm) wide by 5-7/16 inches (13.8cm) high. Chassis depth behind mount- ing panel, including clearance fo

6、r connectors: 14 inches (35.6cm). Knob clearance required in front of mounting panel: 1-1/2 inches (3.8cm). FINISH Anodized gold and black front panel, chassis is black. WEIGHT 16 pounds (7.3Kg) net, 25 pounds (11.4Kg) in shipping carton Notes 1. The four types of heavy lines on the schematics denot

7、e the primary signal path in the following manner: = LEFT CHANNEL = RIGHT CHANNEL = LEFT BALANCED = RIGHT BALANCED 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

8、to ground. A high impedance (10 megohm) voltmeter must be used. 3. Unless otherwise specified: a. Resistor values are in ohms. b. Capacitor values are in microfarads (uF). 4. The voltages enclosed in a box are signal voltages that are measured with a 2.2mV, 1kHz signal connected to both channels at

9、the PHONO 1 INPUT JACKS. FRONT PANEL CONTROLS are set at: BALANCE CENTER DETENT BASS and TREBLE CENTER DETENT INPUT SELECTOR PHONO 1 LOUDNESS NORMAL MODE STEREO POWER ON VOLUME CLOCKWISE TAPE MONITOR 1 and 2 NORMAL RUMBLE and HF FILTERS FLAT SPEAKERS 1 parenthesized values apply to serial numbers LK

10、1001-LK1989. non- parenthasized values apply to serial numbers LK1990 and above. Amplifier 1413 Control and Balance Control 1516 Control and Balance Control BALANCE CONTROL PCB 048478 CONTROL PCB 048479 BALANCE CONTROL PARTS LIST Symbol Part Description RESISTORS and POTENTIOMETERS R1 134475 Balance

11、 Control CONTROL PARTS LIST Symbol Part Description DIODES D1-D32 070047 SIG, 75V, 150mA, 1N4148 INTEGRATED CIRCUITS IC1 133189 Dual Op-Amp. MC33178P IC2 133108 5V Regulator MC7805CT RELAYS K1-K3 087050 SPST, 5VDC, Reed, HE3321A0400 RESISTORS R1 134476 Volume Control SWITCHES S1 146238 Input Switch

12、S2 146239 Mode Switch TRANSISTORS Q1,Q2 132224 PNP, MPS4126 17 18 Treble Bass BASS PARTS LIST Symbol Part Description SWITCHES S1.S2 146240 Bass/Treble Switch TREBLE PARTS LIST Symbol Part Description SWITCHES S4.S5 146240 Bass/Treble Switch BASS PORTION OF PCB 048477 20 19 TREBLE PORTION OF PCB 048

13、477 21 SPEAKER SWITCH PORTION OF PCB 048477 SPEAKER SWITCH PARTS LIST Symbol Part Description DIODES D1-D6 070047 SIG DIODE 1N4148 SWITCHES S3 146241 Speaker Switch Speaker Switch WARNING: Parts located in the below shaded area have critical characteristics. Use ONLY replacement parts recommended by

14、 the manufacturer. AC POWER SUPPLY PORTION OF PCB 048471 AC POWER SUPPLY PARTS LIST Symbol Part Description CAPACITOR C9 061276 Disc Cap, .0047uF, 400VAC FUSES F1 089081 Fuse 1A, 2AG RELAYS K1 087054 SPST,12VDC 22 DC Power Supply NOTE: Components and values toned in gray warrant your attention; pare

15、nthasized values apply to serial numbers LK1001-LK1989, non- parenthasized values apply to serial numbers LK1990 and above. WARNING: Parts located in the below shaded area have critical characteristics. Use ONLY replacement parts recommended by the manufacturer. DC POWER SUPPLY PARTS LIST Symbol Par

16、t Description DIODES D1.D2 070044 BRIDGE, 400V, 2A 23 DC POWER SUPPLY PORTION OF PCB 048471 Repacking Instructions In the event it is necessary to repack the unit for shipment, the unit must be packed exactly as shown below. IMPORTANT - The four plastic feet must be attached to the bottom of the uni

17、t so they will locate in the four holes of the bottom pad. Failure to do this will result in shipping damage. If a shipping carton or any of the interior parts is needed, please call or write the Customer Service Department of Mclntosh Laboratory. Order parts from the accompanying list by part numbe

18、r. Use the original shipping carton and interior parts only if they are in good serviceable condition. Qty. 1 2 1 1 1 4 4 4 1 Part No. Description 033870 Shipping carton only 033884 Corner pad 033883 Inside carton only 033885 Top pad 033886 Bottom pad 017156 Plastic foot 100160 #10-32 x 9/16 Screw 1

19、04080 #10 Flat washer 033915 Shipping carton complete with all the above parts INSIDE CARTON BOTTOM PAD 10-32x9/16 SCREW WITH WASHER (4) BOTTOM COVER UNIT WITH (4) FEET ON TOP PAD INSIDE CARTON CORNER PAD SHIPPING CARTON C22 PREAMPLIFIER Part No. 040354 BE032003 Printed in U.S.A. Mclntosh Laboratory, Inc., 2 Chambers Street, Binghamton, NY 139O3 Telephone (607) 723-3512