McIntosh MQ101 Equalizer Service Information.pdf

《McIntosh MQ101 Equalizer Service Information.pdf》由会员分享，可在线阅读，更多相关《McIntosh MQ101 Equalizer Service Information.pdf（10页珍藏版）》请在收音机爱好者资料库上搜索。

1、nWntosb MQ 101 ENVIRONMENTAL EQUALIZER SERVICE INFORMATION STARTING WITH SERIAL NO. 1V001 f MclNTOSH LABORATORY INC. 2 CHAMBERS STREET BINGHAMTON, NEW YORK 101 OW ELECTRICAL SPECIFICATIONS FREQUENCY RESPONSE +0.5dB from 20Hz to 20,000Hz (with low frequency switch in position 1 and mid and high frequ

2、ency switches in position 3.) DISTORTION Less than 0.1% at rated output level, 20Hz to 20,000Hz HUM AND NOISE 85dB below rated output (l40pV) INPUT SENSITIVITY AND IMPEDANCE Main and tape input 2.5 volts at 60kQ for rated output at 1000Hz. INPUT ATTENUATOR Switched OdB, -6dB, or - 12dB OUTPUT Main:

3、2.5 volts into 47kft or greater load, 20Hz to 20,000Hz Tape: 2.5 volts with rated input EQUALIZATION Low frequency: Mid frequency: High frequency 0 to +17dB at 20Hz in 5 steps (0, +6, +9, +13, +17dB in positions 1, 2, 3, 4, 5 respectively) -5 to +5dB at 4000Hz in 5 equal steps -4 to +4dB at 20,000Hz

4、 in 5 equal steps POWER REQUIREMENT 120 volts, 50/60Hz, 20 watts BLOCK DIAGRAM LEFT CHANNEL AMPLIFIER PC BOARD iHM/aay 1HM/03D OUTPUT 2 3 4 O5 2 3 4 O5 2 3 4 6 S3 MID FREQ. S4 HIGH FREQ S5 LOW FREQ -if- ATyF, 35V I (SEE NOTE 7) LEFT CHANNEL AMP PC BOARD 044-145 POSITION OF SWITCHES ON SCHEMATIC | (S

5、EE NOTE 7) I RIGHT CHANNEL AMP PC BOARD 044- t MQ 101 MQ101 154-588 SCHEMATIC NOTES 1. Unless otherwise specified: Resistance values are in ohms, 1/4 watt, and 10% tolerance; capacitance values smaller than 1 are in microfarads (pF); capacitance values greater than 1 are in picofarads (pF), 2. Print

6、ed 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 ref eren

7、ce only. 5. All voltages indicated on the schematics are measured under the following conditions: a. Use of an 11 megohm input impedance VTVM. b. A1 1 voltages +10% with resDect to chassis ground. c. No signal at input terminals. d. AC input at 117 volts, 50/60 Flz. 6. In units with Serial No.s belo

8、w 1V445, R63 and R64 are 47k. 7. In units with Serial Nos below 3V164: R75 S- R76 are 1.5K; R55 S- R56 are 18K; R89 R41,R42, R43 R45 C1 5 6 C16 are 68pF; C13 C21 C 1 7 C19 R15 R19 R21 R23 R27 R29 R35 R37 R39 capacitance values ads (nF); capacitance icofarads (pF). its are outlined on the he circled

9、numbers pond to the numbers on ics denote the primary ry switches is for ref- schematics are measured impedance VTVM. ipect to chassis ground. ils. 60 Hz. ow 1V445, R63 and R64 W 3V164: R75 S- R76 are R90 are 30K; R41,R42, are 220K; Cl 5 i are 680pF; R15 re used ; R27 R37 ised and C33 C34 iw 3V679 C

10、29 S- C30 iHM/ma 1HM/Q3d J.HM/Q3H !3A/Q3a 1HM/N39 POWER SUPPLY PC BOARD 044-144 MQ 101 REPLACEMENT PARTS A1 1 parts able from not listed are common radio parts jobbers. i terns obta i n- Replacement parts may be obtained when by PART NUMBER from: ordered McIntosh Laboratory, Inc. Customer Service De

11、partment 2 Chambers Street Binghamton, New York 13903 (telephone 607-723-3512) CAPACITORS Symbol Number Description Part Number Cl ,2 Mylar . 1 pF 250V 064-067 C3,4 Mylar .1pF 250V 064-067 C7,8 Tant. Elect. .47pF 35V 066-244 C9J0 Mylar .lpF 250V 064-067 C21,22 Mylar .22pF 250V 064-096 C23.24 Mylar -

12、47pF 250V 064-069 C27,28 Mylar .22pF 250V 064-096 C29.30 Tant. Elect. 3.3pF 35V 066-238 C31,32 Mylar .068pF 250V 064-095 033,34 Mylar .47pF 250V 064-069 035,36 Mylar .47pF 250V 064-069 037,38 Mylar . 1 5pF 250V 064-100 039,40 Mylar .047pF 250V 064-085 0103 Elect. 220pF 16V 066-160 0104 Elect. 200/20

13、0pF 150/100V 066-159 0106 Elect. 220pF 16V 066-160 DIODES D101,102 S i . Rectifie r 070-031 D103 Si. Rectifie r 070-031 D 1 04 Zener Diode 75V 070-025 FUSES F 1 01 Fuse .5 ampere 089-009 CHOKES LI ,2 Choke 300MH 122-100 TRANSISTORS Q1 ,2 Si. PNP transistor 132-074 Q3,4 Si. NPN transistor 132-075 Q5,

14、6 Si. PNP transistor 132-074 Q7,8 Si. NPN transistor 132-075 Q9,10 Si . NPN transistor 132-075 Q101 Power transistor 132-078 Q102 Si. NPN transistor 132-075 SWITCHES SI Tape Monitor 146-142 S2 Input Attenuator 148-026 S3 Mid. Frequency 146-144 S4 High Frequency 146-144 S5 Low Frequency 146-144 TRANS

15、FORMERS T1 01 Power Transformer 1 59-092 LAMPS #1 866 (Front panel) 058-014 RELAYS K1 Rel ay 087-007 FRONT PANEL & TRIM Front Panel 044-179 Front Panel End Caps 018-137 Tape Monitor Knob 043-253 Mid. Frequency Knob 043-253 High Frequency Knob 043-253 Low Frequency Knob (front) 044-375 Low Frequency

16、Knob (rear) 090-100 MOUNTING SYSTEM Shelf Bracket (right) 044-210 Shelf Bracket (left) 044-209 Mounting Template #400 038-429 Hardware Package 044-143 MISCELLANEOUS ITEMS Fuseholder 178-001 AC Power Cord 170-021 Shipping Carton 044-211 Owners Manual 038-669 Audio Cable 170-015 1 5 C1 2 3 1S 7 -M5949 -