McIntosh-C20-Service-Manual 电路图 维修手册.pdf
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McIntosh-C20-Service-Manual 电路图 维修手册.pdf
C20 STEREO PREAMPLIFIER (Serial No. 6L700 MODE SELECTOR BALANCE PHASE H.F. FILTER LOUDNESS INPUT SELECTOR BASS COMPENSATOR TREBLE COMPENSATOR BASS TREBLE RUMBLE FILTER, TAPE JACK, TAPE COMPARE VOLUME LOW FREQUENCY TRIM STEREO 0 0 FLAT FLAT TAPE HD 2 0 TAPE 0 0 OUT ON, CCW 0 RadioFans.CN 收音机爱 好者资料库 C20 Schematic (Schematic No. SC117-201) NOTES: (1) THlS SCHEMATIC APPLIES TO C20 PREAMPLIFIERS WITH SERIAL NUMBERS 6L700 AND ABOVE. (2) ALL ROTARY SWITCHES ARE SHOWN IN THE EXTREME COUNTERCLOCKWISE POSlTION. (3) ALL PUSHBUTTON SWITCHES ARE SHOWN IN THE OUT POSITION. (4) RESISTOR VALUES ARE IN OHMS 10%, WATT EXCEPT AS NOTED. (5) CONDENSER VALUES ARE IN MFD FOR NUMBERS LESS THAN ONE, AND IN MMFD FOR NUMBERS GREATER THAN ONE. (6) IN SOME UNITS C104 MAY BE FOUND AS TWO SEPARATE 2000 MFD/15V CONDENSERS. (7) A RESISTOR IM SOME UNITS MAY BE USED AT THIS POINT TO ADJUST THE VOLUME CONTROLS TRACKING CHARACTERISTlC. THE VALUE IS MATCHED TO THE PARTICULAR VOLUME CONTROL USED * THESE COMPONENTS HAVE A CLOSE TOLERANCE ON THEIR VALUE, OR HAVE SPECIAL CHARACTERISTICS SUCH AS LOW NOISE OR A SPECIAL RESISTANCE TAPER. LABORATORY INC. 2 CHAMBERS STREET, BINGHAMTON, N. Y. Phone-Area Code 607-723-5491 2M-AA117-201 5-62 BE012003 Customer Service Mclntosh Laboratory Inc. 2 Chambers Street Binghamton, New York Our telephone number is 723-5491. The direct dial area code is 607. Your C20 will give you many years of pleasant and satisfactory performance. If you have any questions concerning the operation or maintenance of this pre-amplifier please contact:
