McIntosh MQ104 Equalizer Service Information Early Production.pdf
MQ 104 CUSTOM ENVIRONMENTAL EQUALIZER low FREQUENCY COMPENSATION lift channel ffllntosh MQ 104 - LIFT CHANNEL -1 CUSTOM environmental equalizer iim channel t5 ranters AOLusr.fNTi CHANNEL SERVICE INFORMATION serial no. AM1001 to AM1999 MQ104 PERFORMANCE LIMITS Narrow (approx. 1/3 octave) Wide (approx. 1 octave) LOW FREQUENCY COMPENSATION Five steps of low frequency compensation are included for McIntosh speakers, allowing 0 to + 17dB at 20Hz. INPUT IMPEDANCE 27kP OUTPUT IMPEDANCE 600p; to operate into lOkP load or greater PROGRAMMABLE FILTER MQ104 PROGRAMMABLE FILTER MQ104 EQUALIZER PC BOARD 045-082 < SCHEMATIC NOTES 1. Unless otherwise specified: Resistance values are in ohms, 1/4 watt, and 5/ tolerance; capacitance values smaller than 1 are in microfarads (pF); capacitance values greater than I are in picofarads (pF). 2. Printed circuit board components are outlined on the schematics by dotted lines. The circled numbers around the dotted lines correspond to the numbers on the PC Board layouts. 3. The heavy lines on the schematics denote the primary signal path. 4. The terminal numbering of rotary switches is for reference only. 5. All voltages indicated on the schematics are measured under the following conditions; a. Use of an 11 megohm input impedance VTVM. b. All voltages 10/ with respect to chassis ground. c. No signal at input terminals. d. AC input at 120 volts, 50/60 Hz. 6. In units with Serial Nos below AH 1202 R55 thru r62 are 15K 5% 1/2W resistors, also R65, R67, R68, R69, and R70 are used. in the power supply section R102 is 560a 1W 10% and R103 is 1.8K 1W 10%. REPLACEMENT PARTS All parts not listed are common items obtain- SWITCHES able from radio parts jobbers. SI ,2 L. F. Equa1ization 146-150 Replacement parts may be obtai ned when ordered by PART NUMBER from: RESIST0RS McIntosh Laboratory, 1 nc. R9, 10 Fi Im Res. 27K 5% 1/4W 141-082 Customer Service Department 2 Chambers Street Binghamton, New York 13903 R1 1 , 1 2 Fi 1 m Res. 2.2M 5% 1 /4w 141-124 (telephone 607-723-3512) R -1 3, 14 Fi 1 m Res . 4.7K 5% 1 / 4w 141-064 CAPAC1 TORS R15, 16 F i 1 m Res. 2.2M 5% 1/4W 141-124 Symbol Part R1 7,18 F i lm Res. 180K 5% 1/4W 141-102 Number C9, 10 Desc ription Elect. 1 pF Numbe r F i 1m Res . 4.7K 141-064 R19,20 5% l/4w 50V 066-269 Cl 1 , 12 Mylar ,047pF R21,22 F i Im Res. 360K 5% 1/4W 141-109 100V 064-182 Fi lm Res. 2.2M C13, 14 Mylar ,047pF R23,24 5% I/4W 141-124 100V 064-182 CIS, 16 Elect. 1.5pF R25,26 Fi 1 m Res. 2.2M 5% I/4W 141-124 50V 066-271 C23.24 Mylar .047pF R27.28 Fi lm Res. 2 . 2M 5% 1 /4w 141-124 100V 064-182 Fi Im Res. 2 70K 141-106 C25.26 Mylar .lpF R29.30 5% 1/4W 100V 064-186 Fi lm Res. 141-082 C27,28 Mylar .47pF R31,32 27K 5% 1/4W 100V 064-194 C29.30 Mylar .068pF R33,34 Fi lm Res. 5.6k 5% 1/4W 141-066 100V 064-184 C39.40 Elect. 3.3pF R35,36 Fi 1 m Res. 5.6k 5% 1/4W 141-066 35V 066-238 R37.38 Fi 1 m Res. 560ft 1/4W 141-043 C1 7,18 Elect. 47pF 5% 1 6V 066-182 C35,36 Elect. 47pF R39,40 Fi lm Res. 680ft 5% 1/4W 141-045 1 6V 066-182 Fi 1 m Res . 680ft C37,38 Elect. 47pF R41,42 5% 1/ 4W 141-045 1 6V 066-215 Fi 1 m Res. 68 Oft C51 ,52 Elect. 47pF R43,44 5% 1/4W 141-045 16 v 066-215 C103,104 Elect. 150pF 63V 066-205 R45,46 F i 1 m Res . 680ft 5% 1/4W 141-045 D1 ODES r47,48 Fi 1 m Res . 220K 5% 1/4W 141-104 D 1 Si Sig. Diode 070-047 R49,50 F i 1 m Res . 220K 5% 1/4W 141-104 D 1 0 1 Bridge 400V 2A $70-044 R5I,52 Fi lm Res . 220K 5% 1/4W 141-104 D 1 0 2,103 Zener Diode 16V R53,54 Fi lm Res . 220K 5% 1/4W 141-104 070-089 RELAYS / R55,56 F i 1 m Res. 5.6K 5% 1/4W 141-066 K1 Reed Relay 087-024 R57,58 Fi 1 m Res . 5.6k 5% 1/4W 141-066 TRANSISTORS - R59.60 F i lm Res . 5.6k 5% 1/4W 141-066 Ql , 2 S i NPN transistor 132-090 R 61,62 Fi 1 m Res. 5.6k 5% 1/4W 141-066 Q3,4 S i NPN transistor R63,64 F i lm Res. 22K 5% 1/4W 141-080 132-090 F i 1 m 180 141-031 Q5,6 Si NPN transistor R 71 Res. 5% 1/4W 132-090 Q7,8 Si NPN transistor R 72,73 Fi 1 m Res. 100K 5% 1/4W 141-096 132-090 Q9 Si NPN transistor R74 F i 1 m Res. 22K 5% I /4w 141-080 132-090 INTEGRATED CIRCUITS MISCELLANEOUS 1 TEMS 1 C 1 , 2 1 ntegrated circuit 133-054 F 1 0 1 F use 1/8A Normal Bio 089-035 IC3.4 1ntegrated circui t 133-054 Knob,Equa1 . , L.F (2) 090-076 TRANSFORMERS AC Power Cord 170-021 T1 0 1 Power transformer 159-134 Fuseholder 178-099 POTENT 10METERS Sh ipping Carton 033-227 R1 ,2 100K 134-302 Capacitor Box Assy. 045-145 R3,4 100K 134-302 Audio Cab 1e 170-015 R5,6 I00K 134-302 Owners Manual 039-059 R7,8 100K 134-302
