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McIntosh MX134 Service Manual

McIntosh MX134 Service Manual

A/v control center
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Performance Specifications ................................... 2 - 3
Notes ......................................................................... 3
Rear Panel .................................................................. 4
Section Location ........................................................ 4
Block Diagram ...................................................... 5 - 8
Interconnection Diagram .................................... 9 - 11
Display Schematic and PCB ............................... 12 - 19
Surround Schematic and PCB ............................ 19 - 34
Data Schematic and PCB ....................... 35, 36, 39 - 41
A/V CONTROL CENTER
CONTENTS
SERVICE MANUAL
S-Video Schematic and PCB .............................. 42 - 47
Video Schematic and PCB ................................. 48 - 50
Input Lamp Schematic and PCB ........................ 51 - 56
Component Video Schematic and PCB ............ 57 - 60
Tuner AM/FM Alignment Procedure ................. 61 - 62
Tuner/RAA1 Schematic and PCB ....................... 63 - 66
Parts List ............................................................ 67 - 72
Exploded Views and Parts Lists .......................... 73 - 75
Repacking Instruction .............................................. 77

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Summary of Contents for McIntosh MX134

  • Page 1: Table Of Contents

    A/V CONTROL CENTER CONTENTS Performance Specifications ........2 - 3 S-Video Schematic and PCB ......42 - 47 Notes ................. 3 Video Schematic and PCB ......... 48 - 50 Rear Panel ..............4 Input Lamp Schematic and PCB ......51 - 56 Section Location ............
  • Page 2: Performance Specifications

    PERFORMANCE SPECIFICATIONS FM Tuner Harmonic Distortion 0.5% maximum at 50% modulation Useable Sensitivity 14dBF which is 1.4uV across 75 ohms Frequency Response 50Hz to 6kHz NRSC 50dB Quieting Sensitivity Mono: 19dBF which is 2.4uV across 75 ohms Adjacent Channel Selectivity Stereo: 35dBF which is 15uV across 75 ohms 45dB minimum IHF Signal To Noise Ratio...
  • Page 3: Notes

    240 Volts, 50/60Hz at 65 watts Sensitivity Analog Input: 400mV for 2.0V output NOTE: Refer to the rear panel of the MX134 for the correct voltage. Signal To Noise Ratio – All Outputs Greater than 90dB un-weighted. Greater than 100dB A Overall Dimensions weighted.
  • Page 4: Rear Panel

    REAR PANEL SECTION LOCATIONS TOP VIEW WITH COVER REMOVED...
  • Page 5: Block Diagram

    MX134 BLOCK DIAGRAM...
  • Page 6 BLOCK DIAGRAM con’t...
  • Page 7 MX134 INTERCONNECT...
  • Page 8 DISPLAY 049625 SH 1 OF 2...
  • Page 9 MX134 DISPLAY 049625 SH 2 0F 2...
  • Page 10 DISPLAY SURROUND 049625 049627 SH 1 OF 6 CONTROL SECTION LED SECTION KEYBOARD SECTION...
  • Page 11 MX134 SURROUND 049627 SH 2 OF 6...
  • Page 12 SURROUND 049627 SH 3 OF 6...
  • Page 13 MX134 SURROUND 049627 SECTION 4 OF 6...
  • Page 14 SURROUND 049710 SH 5 OF 6...
  • Page 15 MX134 SURROUND 049627 SH 6 OF 6...
  • Page 16 SURROUND 049627...
  • Page 17 MX134 DATA 049622 SH 1 OF 2...
  • Page 18 NOTES...
  • Page 19 MX134 DATA 049622 SH 2 OF 2...
  • Page 20 S-VIDEO 049624 SH 1 OF 2...
  • Page 21 MX134 S-VIDEO 049624 SH 2 OF 2...
  • Page 22 VIDEO 049623...
  • Page 23 MX134 INPUT 049621 SH 1 OF 2...
  • Page 24 INPUT INPUT 049621 SH 2 OF 2 049621...
  • Page 25 MX134 COMPONENT VIDEO 049706...
  • Page 26 Tune the Generator and Tuner to ANT” pin of the 5 pin connector. (Refer to Page 66.) jacks. Connect a Distortion Analyzer to the MX134 rear panel 1400kHz (20uV, 30% modulation), then Adjust T7 (AM 3. Remove Top Cover and AM/FM TUNER Cover. Turn On IF) for maximum signal.
  • Page 27 MX134 TUNER 049084...
  • Page 28 TUNER RAA1 SECTION 049084...
  • Page 29: Parts List

    MX134 RES FP 47 OHM 5% 1/4W 13704200 PARTS LIST R50 R51 R52 RES NETWORK 9X1K ISO 14428000 RES FP 10 OHMS 5% 1/4W 13702500 R100 R101 RES MF 10K 1% 1/4W 14405300 Ref No. Description Part No. R102 RES NETWORK 4 X 22K BUS...
  • Page 30 IC13 IC14 IC15 IC16 IC 100MA I FEEDBACK AMP 13328600 PARTS LIST IC17 IC18 IC19 IC SPST QUAD FET SWITCHES N O 13342600 IC20 IC21 IC22 IC30 IC31 IC SHFT REG SER-PAR 13318600 J1 J2 J3 J4 J5 JACK S-VIDEO 3X1 14MM 11777900 CONN MALE 10 POS RIGHT ANGLE 11726000...
  • Page 31 MX134 C34 C102 C104 C105 MONO CAP 0.1MF 20% 50V 06127700 PARTS LIST con’t DISC CAP 1.8PF +/-.25PF NPO 06100200 C36 C40 M POLY CAP .015UF 5% 63V DC 06431400 C37 C41 C42 C43 M POLY CAP .033UF 5% 63V DC 06431800 Ref No.
  • Page 32 MX134 EXPLODED VIEW...
  • Page 33 MX134 EXPLODED VIEW PARTS LIST Description Ref No. Part No. 016453 GLASS 148073 SWITCH DPDT ROCKER 017531 PUSHBUTTON ASSY RED 078033 O-RING 017517 PUSHBUTTON ASSY BLK 017739 BEZEL PUSHBUTTON 017852 PUSHBUTTON BLK 017741 RECEPTACLE PUSHBUTTON 049637 ASSY KNOB 34 METRIC NO INDEX 049724 ASSY KNOB 25.5 METRIC NO INDEX...
  • Page 34 NOTES...
  • Page 35: Repacking Instruction

    MX134 REPACKING INSTRUCTION...
  • Page 36 SERVICE MANUAL The continuous improvement of its products is the policy of McIntosh Laboratory Incorporated, who reserve the right to improve design without notice. Because of the constant upgrading of McIntosh products’ circuitry and components, the Company cannot insure, and does not warrant, the accuracy of the within schematic material, which is intended for information only.