McIntosh MC3500 Power Amplifier Service Information.pdf

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1、INPUT OUTP STARTING WITH SERIAL NO. 10N01 r McIntosh laboratory inc. 2 chambers street Binghamton, new york MC 3500 ELECTRICAL SPECIFICATIONS POWER OUTPUT FREQUENCY RESPONSE HARMONIC DISTORTION INTERMODULATION DISTORTION NOISE AND HUM LEVEL INPUT LEVEL OUTPUT IMPEDANCE OUTPUT VOLTAGES AC POWER INPUT

2、 350 watts continuous 20Hz to 20kHz +0, -0.3dB at 350 watts output. 1Hz to 70kHz +0, -3dB at 1 watt output. Less than 0.15$ at rated output or less, 20Hz to 20kHz. Less than Q ,1$% -95dB. 1.1 volt. 1, L|_, 8, 16, 30, and 63. ohms. 17.3, 33.8, 33, 73, 132, 130 volts. 117/123 volts, 30/60Hz, 3.00-900

3、watts. SCHEMATIC NOTES 1. Unless otherwise specified, resistance values are in ohms, 1/2 watts, and 10% tolerance. Capacitance values smaller than 1 are in microfarads (p.F) ; values greater than 1 are in picofarads (pF). Inductors, unless otherwise specified, are in microhenries (pH). 2. The termin

4、al numbering of rotary switches and printed circuit board wires is for reference only. 3. All voltages are measured under the following conditions: A. Use of an 11 megohm input impedance VTVM voltmeter. B. All voltages +10% with respect to chassis ground. C. No signal at input terminals. D. AC input

5、 at 117 volts, 0/60 cycles. E. Front panel controls at: gain meter range power output range fully counterelockwise off on fully counterclockwise 3_. In units with serial numbers below 10N18, LI thru L8 are not used TO AMPLIFIER SECTION r-A-n M N s 101 i i i i i METER RANGE ROTORS ARE INTERCONNECTED

6、METER SECTION MC 3500 154 - 275 YEL/WHT GRN/WHT BLU/WHT BRN/WHT RED/WHT GRY/WHT COAX R 29 - * AMPLIFIER SECTION PRINTED CIRCUIT BOARD 043-767 V 14 6BL7GTA V 5 6LQ6/6JE6B V6 6LQ6/6JI6B V 7 6LQ6/6JE6B V 6 6LQ6/6JE6B I2AX7/ECC83 V 10 I2AX7/ECC83 SUB - SONIC FILTER ) IN REAR CHASSIS INPUTS FRONT PANEL I

7、NPUTS S 2 BLU/WHT BLU YEL/WHT YEL ORN/WHT ORN GRN/WHT GRN 8RN/WHT BRN Ill o I V) 2 X o z o * 1- o 0 Ul ? o o. o z - rr . o t: i- o 13 o UJ O co CD V -O FRONT PANEL -02 OUTPUTS REAR CHASSIS 2 OUTPUTS JUMPER GND M N TO METER SECTION TO METER SECTION V 1 6LQ6/6JE6B V 2 6LQ6/6JE6B V 3 6LQ6/6JE6B V 4 6LQ

8、6/6JE6B AMPLIFIER SECTION MC 3500 154 - 346 4. , a. .v , t , . - - D202 Si. rectifier 070-036 D203 Si. rectifier 070-038 D2014. Si. rectifier 070-036 D205 Si. rectifier 070-031 C206 Zener diode l80V 070-037 CIRCUIT BREAKERS CB201 Power on-off 088-004 FUSES F201 Fuse 10 ampere Slo-Blo 089-018 CHOKES

9、CJ 11 PI Choke 1.2pH 122-011 1*3,4 Choke 1.2pH 122-011 1*5,6 Choke 1.2pH 122-011 1*7,8 Choke l*2pH 122-011 L201 Filter choke 122-061 METERS M101 Meter 12U.-014. TRANSISTORS 0,101 Si. NPN transistor 132-501 Q102 Si. NPN transistor 132-501 0,201 Si. NPN transistor 132-033 POTENTIOMETERS R3 Gain contro

10、l 134-192 R37,38 Bias adjust 134.-176 R45,46 Bias adjust 134-176 R53,54 Bias adjust 134-176 R6l,62 Bias adjust 134-176 R101 Volt, range calibration 134-197 R113 DB range calibration 134-197 R210 Hum balance 134-086 RESISTORS R8 Wirewound 10K 5$ 5w 139-051 Rl5,l6 Composition 100K 1% 1/2W 136-468 R28,

11、29 Composition 39K 5% 2W 136-467 R3l,32 Wirewound 10K 1% 5w 139-052 R39,40 Wirewound 200ft 10% 2W 139-069 R43,44 Wirewound 5ft 5W 139-068 Rl+7,48 Wirewound 200ft 10% 2W 139-069 R5l,52 Wirewound 5ft 5w 139-068 R55.56 Wirewound 200ft 10% 2W 139-069 R59,60 Wirewound 5ft 5% 5w 139-068 REPLACEMENT PARTS

12、All parts not listed are common items obtain able from radio parts jobbers. Replacement parts may be obtained when by PART NUMBER from: ordered McIntosh Laboratory Inc. Customer Service Department 2 Chambers Street Binghamton, New York 13903 (telephone 607-723-3512) CAPACITORS Symbol Number Descript

13、ion Part Number Cl Mylar .lpF 250V 10$ 064-038 C2 Mylar . 22pF 25 ov 064-043 C3 Elect. 12pF 25 ov 066-046 c4 Mylar . 22pF 250 V 064-043 c8 Elect. 12pF 250V 066-046 CIO Elect. 100pF 25v NP 066-115 011,12 Mylar ,47uF 40 ov 064-051 015,16 Mylar . 22pF 630V 064-052 017,18 Elect. 50pF 50V 066-014 C19 ? 2

14、0 Elect. 12p*F 25 ov 066-046 C21,22 Elect. 8pF 600V 066-118 C101 Mylar *4-7 250 V 064-045 C102 Elect. 330pF 3V 066-105 C103 Elect. lOOpF 12V 066-018 0104 Elect. 20pF 20V 066-121 C201 Elect. lOOpF 25v 066-124 C203 Elect. 700pF 275V 066-117 0204 Elect. 700pF 275v 066-117 0205 Elect. 700pF 275V 066-117

15、 0206 Elect. 700pF 275V 066-117 C207 Elect. 100/30/30/30U 450/300/250/250V 066-116 DIODES D1 Si. rectifier 070-031 D2 Zener diode 10V 070-024 D3 Si. signal diode 070-022 D101 Ge. signal diode 070-003 D102 Ge. signal diode 070-003 D103 Ge. signal diode 070-003 D104 Si. signal diode 070-022 D105 Si. r

16、ectifier 070-030 D201 Si. rectifier 070-036 R63,61| Wirewound 2002 10 % 2W 139-069 R67,68 Wirewound 12K 10% 5w 139-033 R69,70 Wirewound 52 si 5w 139-068 R102 Wirewound 18K si 5w 139-062 R109 Wirewound 12K si 5w 139-063 R201 Wirewound 1.5K 10 i 20W 139-061+ R202 W irewound 302 10 i 5w 139-067 R203 Th

17、ermistor 144-006 R204- Wirewound 302 10 i 5w 139-067 SI SWITCHES Sub-sonic filter switch 148-002 S2 Output impedance swtich 146-113 S101 Meter range switch 146-112 S201 Line voltage switch 149-006 S202 Thermal cut-out 153-010 TRANSFORMERS T2 Output transformer 043-766 T201 Power trans. (high voltage

18、) 043-765 T202 Power trans. (low voltage) 043-764 TUBES vi,5 6LQ6/6JE6B 165-059 v 2,6 6LQ6/6JE6B 165-059 V3,7 6LQ6/6JE6B 165-059 VJf, 8 6LQ6/6JE6B 165-059 V9 12AX7/ECC83 165-019 V10 12AX7/ECC83 165-019 Vll 6DJ8/ECC88 165-056 V12 6CG7/6FQ7 165-057 V13 6DJ8/ECC88 165-056 Vll+ 6BL7OTA 165-058 FRONT PAN

19、EL & TRIM Front panel 002-026 Side frame (right) 043-830 Side frame (left) 043-831 Front panel handles 020-025 Gain knob 090-076 Meter range knob 090-076 Output range knob 090-076 Meter bezel 020-022 LAMPS MISCELLANEOUS ITEMS Shipping crate 043-832 Owners manual 038-222 Line cord 170-038 Fuseholder 178-001 Hardware package 043-799 Cooling fan 098-135 Cooling fan guard 098-136 #1855 (METER) 058-030 10C1017S6-M291MN