McIntosh-C22-pre-sm维修电路原理图.pdf

《McIntosh-C22-pre-sm维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《McIntosh-C22-pre-sm维修电路原理图.pdf（6页珍藏版）》请在收音机爱好者资料库上搜索。

1、C 22 SERVICE INFORMATION STARTING WITH SERIAL NO. 10A01 MclNTOSH LABORATORY INC. 2 CHAMBERS STREET BINGHAMTON, NEW YORK C 22 RadioFans.CN 收音机爱 好者资料库 ELECTRICAL SPECIFICATIONS Frequency Response +0.5 to -0.5 dB, 20Hz to 20,000Hz Distortion Less than 0.2% at 10 volts output Less than 0.02% at 3 volts

2、output Input Sensitivity (phono 1, phono 2, tape head) 2 millivolts for 2.5 volts output at 1kHz Input Sensitivity (Microphone) 2.5 millivolts for 2.5 volts output Input Sensitivity (aux, tape, tuner) 0.25 volts for 2.5 volts output Hum And Noise (phono 1, phono 2, tape head) 74 dB below 10 millivol

3、ts input Hum And Noise (aux, tape, tuner) 85 dB below rated output Output (main) 2.5 volts with rated input. Up to 10 volts can be developed without distortion. Output (tape) 0.25 volts with rated input. Phono input signal of 10 millivolts produces 1.25 volts output. Output (L values greater than 1

4、are in picofarads (pF). Resistors marked with * are 1/4W. The terminal numbering of rotary switches and printed circuit board wires is for reference only. All voltages are measured under the following condi- tions: 1. Use of an 11 megohm input impedance VTVM 2. All voltages 10% with respect to groun

5、d 3. AC input at 117 volts, 50/60 cycles 4. No signal at input terminals 5. Front panel controls at normal positions RadioFans.CN 收音机爱 好者资料库 SCHEMATIC NOTES 1. In early units C3 & 4 were 50F. 2. C22s built before 1965 used circuit modules made by Erie Electronics. In 1965, we changed to Sprague Elec

6、tric Co. The Sprague modules are electrically equivalent to the Erie modules but differ mechanically. The newer Sprague modules are used for replacement when servicing early C22 units. For data on replacing the old Erie modules with the Sprague modules, refer to Mclntosh Service Bulletin #108. 3. In

7、 early units R76 thru R83 do not appear. 4. In early units C35 & 36 do not appear. 5. In early units R67 was 50 ohms. POWER SUPPLY 154-317 RadioFans.CN 收音机爱 好者资料库 REPLACEMENT PARTS All parts not listed are common items obtain- able from radio parts jobbers. Replacement parts may be obtained when ord

8、ered by PART NUMBER from: Mclntosh Laboratory Inc. Customer Service Department 2 Chambers Street Binghamton, New York 13903 (telephone 607-723-3512) CAPACITORS Symbol Part Number Description Number C3,4 Elect. 100 F 3V 066-047 C29 Elect. 40F 200V 066-049 C30 Elect. 1000/40/20 /20F 066-037 25/200/35o

9、/35ov C31 Elect. 50/50/50 F 066-033 350/350/300V C32 Elect. 1200/1200F 066-029 30/30V DIODES D1,2 Se. rectifier 070-005 D3,4 Si. rectifier 070-014 D5,6 Si. rectifier 070-014 PUSES F1 Fuse 1 amp 089-002 CHOKES L1 ,2 Choke 100 mH . 122-004 POTENTIOMETERS R1, 2 Tape equal. (1/2 Dia. ) 134-059 R1, 2 Tap

10、e equal. (5/8 Dia. ) 134-186 R3,4 Bass trim (1/2 Dia. ) 134-059 R3,4 Bass trim (5/8 Dia.) 134-186 R5 Balance control 134-061 R6 Volume control 134-060 R7,8,9 Output level (5/8 Dia.) 134-186 R7,8,9 Output level (1/2 Dia. ) 134-059 RESISTORS R16,17 Low noise 330K 5% 1W 144-005 R20,21 Low noise 1.8K 5%

11、 1/2W 144-002 R46,147 Low noise 330K 5% 1W 144-005 R67 Wirewound 33 ohm 10% 5W 139-007 R74,75 Wirewound 7.5 ohm 10% 5W 139-010 RadioFans.CN 收音机爱 好者资料库 S1 S2 S3 S4 S5 S6,7 S8 S9,10 S11 S12 S13 S14 S15 T1 - - - SWITCHES Tape jacks switch Input selector switch Tape switch Comp. switch Mode selector swi

12、tch Treble control switch Loudness switch Bass control switch Rumble switch H.F. filter switch Power switch Pilot lamp switch Phase switch TRANSFORMERS . Power transformer MODULES Treble cut Treble boost Bass, upper Bass, lower Rumble filter H.P. filter Phono equalization LAMPS #334 (indicator) Fest

13、oon (indicator glass) FRONT PANEL & TRIM Front panel Front panel glass End cap, right End cap, left Volume control knob Mode selector knob Input selector knob Balance knob Bass control knob Tape jacks knob Treble control knob Rocker switch knob Level set knob 146-053 146-049 148-006 148-006 149-108

14、146-052 148-006 146-051 148-006 148-006 148-005 148-003 148-007 159-019 130-016 130-017 130-018 130-019 130-020 130-021 130-026 058-003 058-033 043-359 016-034 018-043 018-044 043-253 043-253 043-253 043-253 O43-428 043-428 043-428 090-007 090-010 MOUNTING SYSTEM Shelf bracket (right) 043-592 Shelf

15、bracket (left) 043-593 Mounting template #100 038-179 Hardware package 043-448 MISCELLANEOUS ITEMS Line cord 170-021 Fuse holder 178-001 Shipping carton 033-027 Owners manual 038-027 Plastic feet 017-041 Shorting plug 127-001 Indicator glass 016-036 Audio cable (6) 170-015 Audio cable (1 phone, 170-016 1 phono) 20C0425S6-8M270 SCHEMATIC PART NO. 038-270 Be122002 RadioFans.CN 收音机爱 好者资料库