McIntosh-MI-3-Service-Manual 电路图 维修手册.pdf

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1、MI-3 MAXIMUM PERFORMANCE INDICATOR SERVICE INFORMATION STARTING WITH SERIAL NO, 10E01 MclNTOSH LABORATORY INC. 2 CHAMBERS STREET BINGHAMTON, NEW YORK MI-3 RadioFans.CN 收音机爱 好者资料库 MI-3 S C H E M A T I C NOTES AUDIO DRIVER P.C. BOARD 043-984 I. Unless otherwise specified: Resistance values are in ohms

2、, 1/2 watt, and 10% tolerance; capacitance values a re in microfarads (F). 2 . Printed c i r c u i t board components are outlined on the schematics by dotted lines. The circIed numbers around the dotted l i n e s correspond to the numbers on the PC Board layouts. 3. The terminal number ing of rotar

3、y switches is for reference only. 4. A l l voltages indicated on the schema tics are measured under the following conditions: a. Use of an 11 megohm input impedance VTVM. b. A l l voltages 10% with respect to chassis ground. c. No signal at input or antenna terminals. d. AC Input at 117 volts, 50/60

4、 Hz. e. Mode selector at test position. 5. In units with Serial Nos below 10E26, two neon bulbs (Mclntosh Part No. 058-002) are used in place of R59 6. In units with Serial Nos from 10E26 to 15E00, R60 and R61 are used. 7. In units with Serial Nos below 13E00, a 6W4 rectifier tube (Mclntosh Part No.

5、 165-016) is used in place of SR7 8. In early units, PC Board 043-984 and R43 and R50 are not used. The arm of R48A is connected directly to pin No. 2 of S1 and the arm of R48B is connected directly to C7. RadioFans.CN 收音机爱 好者资料库 HORIZONTAL AMPLIFIER AUDIO DRIVER P.C. BOARD 043-984 NOTE 8 VERTICAL A

6、MPLIFIER RadioFans.CN 收音机爱 好者资料库 M l - 3 154-434 MI-3 C.R.T. CIRCUIT MI-3 REPLACEMENT PARTS All parts not listed are common items obtain- able from radio parts jobbers. Replacement parts may be obtained when ordered by PART NUMBER from: Symbol Number C3 C4 C5 C6 C7 C9, 10 C11 SR1,2 SR3,4 SR5,6 SR7 F

7、1 Q1,2 T1 R1 R2 R3 R4 R5 R6 R29 R30 R32 Mclntosh Laboratory, Inc. Customer Service Department 2 Chambers Street Binghamton, New York 13903 (telephone 607-723-3512) CAPACITORS Description Mylar .01 F 400V Elect. 20/20F 500/500V Mylar -5F 1000V Elect. 8F 475V Mylar .22F 200V Mylar .22F 250V Mylar .1 F

8、 200V DIODES Se. rectifier Se. rectifier Se. rectifier Se. rectifier FUSES Fuse 1 A slo-blo TRANSISTORS Si . NPN transistor LAMPS NE2H Neon tube TRANSFORMERS Power transformer POTENTIOMETERS Signal strength cal. Deviation cal. Left gain Right gain Vertical position Horizontal position Astigmatism In

9、tensity Focus Part Number 064-002 066-025 064-023 066-052 064-013 064-043 064-011 070-005 070-005 070-005 070-026 089-001 132-057 058-009 159-068 134-206 134-206 134-206 134-206 134-206 134-044 134-047 134-041 134-041 MI-3 SCHEMATIC PART NO. 038-462 R45 R48 R41 R42 S1 S2 V1 ,2 V3,4 V5 V6 V7,8 Vertic

10、al audio position Audio gain RESISTORS Wirewound 15k 10% 10W Wirewound 20k 10% 10W SWITCHES Selector switch Power on-off TUBES 6EA8 6EA8 3RP1 (CRT) 6EA8 OB2 FRONT PANEL & TRIM Front panel Front panel end cap: right Front panel end cap: lef t Power knob Audio display knob Intensity knob Focus knob Ve

11、rtical position knob Horizontal position knob Scope test knob MOUNTING SYSTEM Shelf bracket: right Shelf bracket: left Mounting template #100 Hardware package MISCELLANEOUS ITEMS Fuseholder AC power cord Shipping carton Owners manual Audio cable 134-206 134-171 139-040 139-018 146-100 146-040 165-044 165-044 165-028 165-044 165-027 043-697 018-132 018-133 043-253 043-253 043-478 043-478 043-478 043-478 043-806 043-427 043-428 038-179 043-458 178-001 170-021 043-943 038-142 170-015 10C0819S7-M0462