McIntosh MX 136 Service Manual

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PERFORMANCE SPECIFICATIONS 2 Audio Specifications Frequency Response Left, Center, Right, Left Surround, Right Surround, Left Back, Right Back: ±0.5dB from 20Hz-20,000Hz Subwoofer 1: ±0.5dB from 20Hz-140Hz Total Harmonic Distortion 0.005% maximum from 20Hz to 20,000Hz at rated output Signal To Noise Ratio Phono:86dB below 10mV input (A Weighted) High Level:96dB below rated output (A Weighted) Rated Output Voltage 2.5V Unbalanced Outputs (Main) 5.0V Balanced Outputs (Main) Maximum Voltage Output 9.5V Unbalanced 19V Balanced Output Impedance 100 ohms Unbalanced 200 ohms Balanced Input Impedance Phono:47k Ohms, 65pf High Level:22k Ohms Unbalanced 50k Ohms Balanced Sensitivity for Rated Output Phono: 5mV High Level: 500mV Unbalanced 1V Balanced Maximum Input Signal Phono:50mV High Level:5V Unbalanced 10V Balanced Voltage Gain Phono to Tape/VCR Out:40dB Phono to Output (Main):54dB High Level to Tape/VCR Out: 0dB High Level to Output (Main):14dB Tone Controls Bass Control:±12dB at 30Hz Treble Control:±12dB at 10,000Hz General Specifications Power Requirements 100 Volts, 50/60Hz at 65 watts 110 Volts, 50/60Hz at 65 watts 120 Volts, 50/60Hz at 65 watts 220 Volts, 50/60Hz at 65 watts 230 Volts, 50/60Hz at 65 watts 240 Volts, 50/60Hz at 65 watts Note: Refer to the rear panel of the MX136 for the correct voltage. Overall Dimensions Width is 17-3/4 inches (45.09cm) Height is 9-7/16 inches (23.97cm) including feet Depth is 18-3/4 inches (47.63cm) including the Front Panel and Knobs Weight 31 pounds (14.06Kg) net, 55 pounds (24.95Kg) shipping Shipping Carton Dimensions Width is 25 inches (63.5cm) Depth is 28 inches (71.12cm) Height is 18-3/8 inches (46.67cm) FM Tuner Specifications Useable Sensitivity 14dBf which is 1.4uV across 75 ohms 50dB Quieting Sensitivity Mono:19dBf which is 2.4uV across 75 ohms Stereo: 35dBf which is 15uV across 75 ohms Signal To Noise Ratio Mono:75dB Stereo:70dB Frequency Response Mono: + 0, - 1dB from 20 to 15,000Hz Stereo: + 0, - 1dB from 20 to 15,000Hz Harmonic Distortion Mono:0.3% at 100Hz 0.3% at 1,000Hz 0.3% at 10,000Hz Stereo:0.45% at 100Hz 0.45% at 1,000Hz 0.65% at 10,000Hz Intermodulation Distortion Mono 0.25% Stereo 0.45%

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PERFORMANCE SPECIFICATIONS cont MX136 1. The heavy lines on the schematic denote the primary signal path. 2. Unless otherwise noted, all voltages indicated on the schematics are measured under the following conditions: a. AC input at 120 volts, 50/60Hz. b. All voltages are +/-10% with respect to ground. A high impedance (10 megaohm) voltmeter must be used.3. On PC board drawings, Square pad indicates: a. Polarized Capacitors - Positive b. Diodes - Cathode c. Others - Pin 1 4.WARNING Parts marked with the symbol have critical characteristics. Use only replacement parts recom- mended by the manufacturer. NOTES REAR PANEL 3 Capture Ratio 1.2dB Alternate Channel Selectivity 75dB Spurious Response 100dB Image Response 75dB RF Intermodulation 65dB Stereo Separation 45dB at 100Hz 45dB at 1,000Hz 35dB at 10,000Hz SCA Rejection 65dB AM Tuner Specifications Sensitivity 20uV External Antenna Input Signal To Noise Ratio 48dB at 30% modulation 58dB at 100% modulation Harmonic Distortion 0.5% maximum at 50% modulation Frequency Response 50Hz to 6kHz NRSC Adjacent Channel Selectivity 45dB minimum IHF Image Rejection 65dB minimum from 540 to 1600kHz IF Rejection 80dB minimum

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1820 19 2A SURROUND 750570 SH 1 OF 6 3 KEYBOARD SECTION 750568 2C LED SECTION 750569 2B DISPLAY CONTROL SECTION 750565

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BALANCED 750567 PCB 10 6970

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Ref. No.DescriptionPart No. DATA PCB 750562 Contd. Ref. No.DescriptionPart No. PARTS LIST Contd. C27 CAP ELECT 47UF 35V 066446 C28 CAP MONO 470PF 100V 10% NPO 061343 C30 CAP MONO 220PF 200V 10% NPO 061342 C35 CAP MONO .1UF 50V 20% Z5U 061346 C40 CAP MONO 220PF 200V 10% NPO 061342 C41 CAP MONO 220PF 200V 10% NPO 061342 C36 CAP MONO .1UF 50V 20% Z5U 061346 D20 DIODE SILICON 070174 D21 DIODE SILICON 070174 RIVET 1/8X3/16 STEEL 108011 IC1 IC 2 INPUT X 4 133591 IC2 IC 2 INPUT X 4 133591 IC3 IC NOR 2 INPUT X 4 133592 IC4 IC AND 2 INPUT X 4 133577 IC5 IC SHFT REG SER-PAR 133594 IC6 IC SHFT REG SER-PAR 133594 IC7 IC SHFT REG SER-PAR 133594 IC8 IC SHFT REG SER-PAR 133594 IC9 IC SHFT REG SER-PAR 133594 IC10 IC 8 LN DRIVER ARRAY 133180 (IC10) IC SOCKET 18 PIN DIP 178184 IC11 IC 8 LN DRIVER ARRAY 133180 (IC11) IC SOCKET 18 PIN DIP 178184 IC12 IC 8 LN DRIVER ARRAY 133180 (IC12) IC SOCKET 18 PIN DIP 178184 IC23 IC LINE RECEIVER QUAD 133428 IC24 IC 2 INPUT X 4 133591 IC25 IC HEX UNBUF INVERTER 133576 IC35 IC 8 LN DRIVER ARRAY 133180 (IC35) IC SOCKET 18 PIN DIP 178184 IC40 IC 8-INPUT SEL/MULTI 133219 J1 CONN MALE 7 PIN 117217 J2 CONN 4 PIN 117215 J3 CONN MALE 6 POS FRICTION LOCK 117218 J5_ CONN MALE 9 POS FRICTION LOCK 117244 J8 JACK MINI117494 J9 JACK MINI117494 J10 JACK MINI117494 J11 JACK MINI117494 J12 JACK MINI117494 J13 JACK MINI117494 J14 JACK MINI117494 J15 JACK MINI117494 J16 JACK MINI117494 J17 JACK MINI117494 J18 JACK MINI117494 J19 JACK MINI117494 J20 JACK MINI117494 J21 JACK MINI117494 J22 JACK MINI117494 J30 CONN 4 PIN 117215 J32 CONN MALE 7 PIN 117217 J37 CONN MALE 10 POS RIGHT ANGLE 117260 J36 JACK RCA 4X1 ORANGE 14MM 117778 L1 INDUCTOR 3.9UH 5% 122400 L2 CHOKE 18UH 5%-10% 122394 L3 CHOKE 18UH 5%-10% 122394 L4 CHOKE 18UH 5%-10% 122394 L5 CHOKE 18UH 5%-10% 122394L6 CHOKE 18UH 5%-10% 122394 L7 CHOKE 18UH 5%-10% 122394 L8 CHOKE 18UH 5%-10% 122394 L9 CHOKE 18UH 5%-10% 122394 L10 CHOKE 18UH 5%-10% 122394 OPT1FIBER OPTIC RECEIVER 058179 OPT2FIBER OPTIC RECEIVER 058179 OPT3FIBER OPTIC RECEIVER 058179 OPT4TRANSMITTER FIBER OPTIC 058180 PCB1 PC BD DATA129774 R1 RES NETWORK 5 X 100 ISO 144677 R2 RES NETWORK 5 X 100 ISO 144677 R3 RES NETWORK 5 X 100 ISO 144677 R5 RES MF 100K 1% 1/4W 144528 R6 RES MF 100K 1% 1/4W 144528 R7 RES MF 100K 1% 1/4W 144528 R8 RES MF 100K 1% 1/4W 144528 R10 RES MF 100K 1% 1/4W 144528 R11 RES MF 100K 1% 1/4W 144528 R20 RES MF 1K 1% 1/4W 144513 R30 RES MF 75 OHM 1% 1/4W 144644 R31 RES MF 75 OHM 1% 1/4W 144644 R32 RES MF 75 OHM 1% 1/4W 144644 R33 RES MF 365 OHM 1% 1/4W 144505 R34 RES MF 95.3 OHM 1% 1/4W 144572 R40 RES MF 10K 1% 1/4W 144504 R60 RES MF 100K 1% 1/4W 144528 R61 RES MF 1K 1% 1/4W 144513 R63 RES MF 100K 1% 1/4W 144528 T 1 TRANSFORMER DIGITAL INTERFACE159351 U1 IC REGULATOR 12V 133590 5 S-VIDEO PCB 750564 C3 CAP MONO .1UF 50V 20% Z5U 061346 C4 CAP MONO .1UF 50V 20% Z5U 061346 C7 CAP MONO .1UF 50V 20% Z5U 061346 C8 CAP MONO .1UF 50V 20% Z5U 061346 C9 CAP MONO .1UF 50V 20% Z5U 061346 C10 CAP MONO .1UF 50V 20% Z5U 061346 C11 CAP MONO .1UF 50V 20% Z5U 061346 C13 CAP MONO .1UF 50V 20% Z5U 061346 C14 CAP MONO .1UF 50V 20% Z5U 061346 C15 CAP MONO .1UF 50V 20% Z5U 061346 C16 CAP ELECT 10UF 50V 066445 C17 CAP ELECT 10UF 50V 066445 C21 CAP MONO .1UF 50V 20% Z5U 061346 C22 CAP MONO .1UF 50V 20% Z5U 061346 C24 CAP MONO .1UF 50V 20% Z5U 061346 C26 CAP MONO .1UF 50V 20% Z5U 061346 C29 CAP MONO .1UF 50V 20% Z5U 061346 C30 CAP MONO .1UF 50V 20% Z5U 061346 C31 CAP MONO .1UF 50V 20% Z5U 061346 C32 CAP MONO .1UF 50V 20% Z5U 061346 C34 CAP MONO .1UF 50V 20% Z5U 061346 C36 CAP MONO .1UF 50V 20% Z5U 061346 C46 CAP MONO .1UF 50V 20% Z5U 061346 C47 CAP ELECT 10UF 50V 066445 C48 CAP ELECT 10UF 50V 066445 C49 CAP ELECT 10UF 50V 066445 C50 CAP ELECT 10UF 50V 066445 C51 CAP ELECT 10UF 50V 066445 80

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MX136 Ref. No.DescriptionPart No. INPUT PCB 750561 Contd. Ref. No.DescriptionPart No. PARTS LIST Contd. R110 RES MF 1K 1% 1/4W 144513 R111 RES FP 10 OHM 5% 1/4W 137105 R112 RES FP 10 OHM 5% 1/4W 137105 R113 RES FP 10 OHM 5% 1/4W 137105 U2 IC OPERATIONAL AMP LOW NOISE 133565 U3 IC OPERATIONAL AMP LOW NOISE 133565 U4 IC 3-8 LINE DEC LATCH 133170 RIVET 1/8X3/16 STEEL 108011 8 COMPONENT VIDEO PCB 750566 BRKT1BRACKET PCB CARD MOUNTING003611 C1 CAP MPF 0.047UF 5% 63VDC 064320 C2 CAP MPF 0.047UF 5% 63VDC 064320 C3 CAP MPF 0.047UF 5% 63VDC 064320 C4 CAP ELECT 10UF 50V 066445 C5 CAP MONO 220PF 200V 10% NPO 061342 C6 CAP MPF 0.047UF 5% 63VDC 064320 C7 CAP MPF 0.047UF 5% 63VDC 064320 C8 CAP MPF 0.047UF 5% 63VDC 064320 C9 CAP MPF 0.047UF 5% 63VDC 064320 C10 CAP ELECT 47UF 25V 20% BP 066556 C11 CAP ELECT 47UF 25V 20% BP 066556 C12 CAP MPF 0.047UF 5% 63VDC 064320 C13 CAP MPF 0.047UF 5% 63VDC 064320 C14 CAP MPF 0.047UF 5% 63VDC 064320 C15 CAP MPF 0.047UF 5% 63VDC 064320 C16 CAP MPF 0.068UF 5% 63VDC 064323 C17 CAP MPF 0.047UF 5% 63VDC 064320 C19 CAP ELECT 470UF 16V 066508 C20 CAP ELECT 470UF 16V 066508 C21 CAP MONO 390PF 5% 200V 061352 C22 CAP MONO 120P 5% 200V 061351 C23 CAP MONO 560PF 200V 5% NPO 061348 C24 CAP MONO 390PF 5% 200V 061352 C25 CAP MONO 120P 5% 200V 061351 C26 CAP MONO 560PF 200V 5% NPO 061348 C27 CAP MONO 390PF 5% 200V 061352 C28 CAP MONO 120P 5% 200V 061351 C29 CAP MONO 560PF 200V 5% NPO 061348 C30 CAP ELECT 47UF 25V 20% BP 066556 C31 CAP MONO .1UF 50V 20% Z5U 061346 C32 CAP MONO .1UF 50V 20% Z5U 061346 C33 CAP MONO .1UF 50V 20% Z5U 061346 C34 CAP MONO .1UF 50V 20% Z5U 061346 C35 CAP ELECT 47UF 25V 20% BP 066556 C36 CAP MONO .1UF 50V 20% Z5U 061346 C37 CAP MONO .1UF 50V 20% Z5U 061346 C40 CAP ELECT 47UF 25V 20% BP 066556 C41 CAP ELECT 47UF 25V 20% BP 066556 C42 CAP MONO .1UF 50V 20% Z5U 061346 C43 CAP ELECT 47UF 25V 20% BP 066556 C44 CAP ELECT 10UF 50V 066445 C45 CAP MONO .1UF 50V 20% Z5U 061346 C46 CAP ELECT 10UF 50V 066445 C47 CAP MONO .1UF 50V 20% Z5U 061346 C48 CAP MONO .1UF 50V 20% Z5U 061346 C49 CAP ELECT 47UF 25V 20% BP 066556 C50 CAP MONO 220PF 200V 10% NPO 061342 C61 CAP MONO .1UF 50V 20% Z5U 061346C62 CAP ELECT 10UF 50V 066445 C63 CAP MONO .1UF 50V 20% Z5U 061346 C64 CAP ELECT 10UF 50V 066445 C67 CAP MONO 22PF 200V 10% NPO 061339 C68 CAP MONO 1000PF 50V 10% NPO 061344 C69 CAP MONO 10PF 200V 10% NPO 061338 C70 CAP MONO 10PF 200V 10% NPO 061338 C71 CAP MONO 22PF 200V 10% NPO 061339 C72 CAP MONO 22PF 200V 10% NPO 061339 C73 CAP MONO .1UF 50V 20% Z5U 061346 C75 CAP MONO .1UF 50V 20% Z5U 061346 C76 CAP MONO .1UF 50V 20% Z5U 061346 C77 CAP MONO .1UF 50V 20% Z5U 061346 C78 CAP MONO .1UF 50V 20% Z5U 061346 C79 CAP MONO 33PF 200V 5% NPO 061347 C80 CAP MONO 33PF 200V 5% NPO 061347 C110 CAP MONO .1UF 50V 20% Z5U 061346 C111 CAP MONO .1UF 50V 20% Z5U 061346 C112 CAP MONO .1UF 50V 20% Z5U 061346 C113 CAP MONO .1UF 50V 20% Z5U 061346 C114 CAP MONO .1UF 50V 20% Z5U 061346 C115 CAP MONO .1UF 50V 20% Z5U 061346 C116 CAP MONO .1UF 50V 20% Z5U 061346 C117 CAP MONO .1UF 50V 20% Z5U 061346 C118 CAP MONO .1UF 50V 20% Z5U 061346 C119 CAP MONO .1UF 50V 20% Z5U 061346 C170 CAP ELECT 100UF 25V 066573 C174 CAP ELECT 100UF 25V 066573 HS1 HEATSINK T0220 080014 HS2 HEATSINK T0220 080014 HS3 HEATSINK T0220 080014 IC5 IC PROG VIDEO CPLD 133660 133661 IC9 IC 100MA I FEEDBACK AMP 133579 IC10 IC 100MA I FEEDBACK AMP 133579 IC12 IC 100MA I FEEDBACK AMP 133579 IC13 IC 100MA I FEEDBACK AMP 133579 IC15 IC REGULATOR 3.3V LOW DROPOUT 133630 (IC15) IC SOCKET 84 PIN PLCC 178185 IC22 IC SHFT REG SER-PAR 133594 IC36 IC REGULATOR +5V 133569 J1 CONN 2X7 SHROUDER HEADER 117970 J2 CONN 2X5 SHROUDER HEADER 117969 J3 CONN 4 PIN 117215 J4 CONN MALE 7 PIN 117217 J5 CONN HEADER 10 POS 117333 J6 CONN 2 PIN MALE 117213 J7 CONN 4 PIN 117215 J8 CONN MALE 6 POS FRICTION LOCK 117218 J9 CONN 2 PIN MALE 117213 J10 CONN 2X13 SHROUDED HEADER 117971 J13 RCA JACK 2 X 3 RBG 117840 J17 RCA JACK 2 X 3 RBG 117840 J19 RCA JACK 2 X 3 RBG 117840 J20 CONN MALE 10 POS RIGHT ANGLE 117260 J21 CONN MALE 12 POS ASSY 117220 L1 BEADS FERRITE LEADED 076023 L2 BEADS FERRITE LEADED 076023 L3 CHOKE RF 3.3UH 10% 122398 L4 CHOKE RF 3.3UH 10% 122398 L5 CHOKE RF 3.3UH 10% 122398 L6 CHOKE RF 3.3UH 10% 122398 L7 CHOKE 8.2UH 10% CC 122399 L8 CHOKE RF 3.3UH 10% 122398 L9 CHOKE RF 3.3UH 10% 122398 85