McIntosh-MX134-av-sm维修电路原理图.pdf

《McIntosh-MX134-av-sm维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《McIntosh-MX134-av-sm维修电路原理图.pdf（36页珍藏版）》请在收音机爱好者资料库上搜索。

1、SERVICE MANUAL 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 S-Video Schematic and PCB. 42 - 47 V

2、ideo 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 CONTENTS A/V CON

3、TROL CENTER RadioFans.CN 收音机爱 好者资料库 PERFORMANCE SPECIFICATIONS FM Tuner 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 Respo

4、nse 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 Intermodulaton Distortion Mono: 0.25% Stereo: 0.45% Capture Ratio 1.2dB Alternate Channel

5、 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 Sensitivity 20uV external antenna input Signal To Noise Ratio 48dB at 30% modulation 58dB at 100% modulation Harmonic D

6、istortion 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 Audio Frequency Response Stereo: Left and Right Small speakers: 80Hz-20,000Hz Subwoofer: 20Hz-80Hz Le

7、ft and Right Large speakers: 20Hz-20,000Hz Subwoofer: OFF Pro-Logic II: (Movie Processing Mode) Left, Center, Right, Small speakers: 80Hz-20,000Hz Surround Small speakers: 80Hz-7kHz Subwoofer: 20Hz-80Hz (Music Processing Mode) Left, Center, Right, Large speakers: 20Hz-20,000Hz Surround Large speaker

8、s: 20Hz-20,000Hz Subwoofer: OFF Dolby Digital and DTS: Left, Center, Right, Large speakers: 80Hz-20,000Hz Surround Large speakers: 20Hz-20,000Hz Subwoofer: OFF Left, Center, Right Large speakers: 20Hz-20,000Hz Surround Large speakers: 20Hz-20,000Hz Subwoofer: 20Hz-80Hz External Input Left, Center, R

9、ight, Left Surround, Right Surround: 20Hz-20,000Hz Subwoofer: 20Hz-20kHz (no LP filtering) Rated Output All Modes: 2.0Vrms for full bit digital input Input Impedance 22k ohms 2 RadioFans.CN 收音机爱 好者资料库 3 1. The heavy lines on the schematic denote the primary signal path. 2. Unless otherwise noted, al

10、l 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. 4.On PC board drawings, Square pad indicates: a. Polarized Capacitors - Posi

11、tive b. Diodes - Cathode c. Others - Pin 1 5.WARNING Parts marked with the symbol have critical characteristics. Use only replacement parts recom- mended by the manufacturer. NOTES Output Impedance 47 ohms at all outputs Maximum Output Voltage 9.5 Vrms Total Harmonic Distortion 0.005% at all outputs

12、 Sensitivity Analog Input: 400mV for 2.0V output Signal To Noise Ratio All Outputs Greater than 90dB un-weighted. Greater than 100dB A weighted. Greater than 98dB CCIR. Maximum Input Signal Analog Input: 6Vrms Voltage Gain Analog Input to Output: 14Db Frequency Response +0, -0.5dB from 20Hz to 20,00

13、0Hz Tone Controls +12dB, -12dB from flat setting 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

14、 panel of the MX134 for the correct voltage. Overall Dimensions Front Panel: 17-1/2 inches (44.5cm) wide, 7-5/8 inches (19.37cm) high. Depth behind front mounting panel is 21 inches (53.3cm) including clearance for connectors. Panel clearance required in front of mounting panel is 1-1/8 inches (2.9c

15、m). Weight 32.5 pounds (14.8kg) net, 51.5 pounds (23.4kg) shipping weight PERFORMANCE SPECIFICATIONS cont MX134 RadioFans.CN 收音机爱 好者资料库 4 REAR PANEL SECTION LOCATIONS TOP VIEW WITH COVER REMOVED RadioFans.CN 收音机爱 好者资料库 56 MX134 BLOCK DIAGRAM RadioFans.CN 收音机爱 好者资料库 78 BLOCK DIAGRAM cont RadioFans.CN

16、 收音机爱 好者资料库 91110 INTERCONNECT MX134 1 RadioFans.CN 收音机爱 好者资料库 121413 DISPLAY 049625 SH 1 OF 22A BC RadioFans.CN 收音机爱 好者资料库 151716 DISPLAY 049625 SH 2 0F 2 MX134 2A BC RadioFans.CN 收音机爱 好者资料库 182019 DISPLAY 049625 CONTROL SECTION 2ASURROUND 049627 SH 1 OF 63 KEYBOARD SECTION2C LED SECTION 2B RadioFa

17、ns.CN 收音机爱 好者资料库 SURROUND 049627 SH 2 OF 63 212322 MX134 RadioFans.CN 收音机爱 好者资料库 242625 3 SURROUND 049627 SH 3 OF 6 RadioFans.CN 收音机爱 好者资料库 2728 SURROUND 049627 SECTION 4 OF 63 MX134 RadioFans.CN 收音机爱 好者资料库 2930 SURROUND 049710 SH 5 OF 63 RadioFans.CN 收音机爱 好者资料库 SURROUND 049627 SH 6 OF 63 3132 MX134

18、 RadioFans.CN 收音机爱 好者资料库 SURROUND 0496273 3334 RadioFans.CN 收音机爱 好者资料库 DATA 049622 SH 1 OF 24 3536 MX134 RadioFans.CN 收音机爱 好者资料库 NOTES 3738 RadioFans.CN 收音机爱 好者资料库 394140 DATA 049622 SH 2 OF 24 MX134 RadioFans.CN 收音机爱 好者资料库 S-VIDEO 049624 SH 1 OF 25 424443 RadioFans.CN 收音机爱 好者资料库 454746 S-VIDEO 0496

19、24 SH 2 OF 25 MX134 RadioFans.CN 收音机爱 好者资料库 485049 VIDEO 0496236 RadioFans.CN 收音机爱 好者资料库 515352 INPUT 049621 SH 1 OF 27 MX134 RadioFans.CN 收音机爱 好者资料库 545655 INPUT 049621 SH 2 OF 27INPUT 0496217 RadioFans.CN 收音机爱 好者资料库 COMPONENT VIDEO 0497068 MX134 575958 RadioFans.CN 收音机爱 好者资料库 COMPONENT VIDEO 04970

20、68TUNER ALIGNMENT PROCEDURE AM ALIGNMENT PROCEDURE 1.Connect an AM Signal Generator to the RAA1 ”EXT ANT” pin of the 5 pin connector. (Refer to Page 66.) Connect a Distortion Analyzer to the MX134 rear panel TUNER IN/OUT RCA jacks. 2.Tune to bottom of band, and adjust T11 (AM OSC Coil) for 3.0VDC at

21、 R46. 3.Tune to top of band and adjust C64 (AM OSC Trimmer Capacitor) for 26.0VDC at Connector R46. 4.Repeat steps 4 and 5 as necessary for a Tuning Voltage Range of 3.0 to 26.0VDC. 5.Tune the Generator and Tuner to 600kHz, then adjust Coils: T101 (AM ANT) and T12 (AM RF) for best sensitiv- ity. Not

22、e: Coil T101 (AM ANT) is located on the RAA1. It is labeled “L1”. 6.Tune the Generator and Tuner to 1400kHz, then adjust Trimmer Capacitors: C106 (AM ANT) and C61 (AM RF) for best sensitivity. Note: Trimmer Capacitor C106 (AM AMT) is located on the RAA1. It is labeled “C1”. 7.Repeat 8 and 9 until no

23、 improvement in sensitivity is noted. Figure 1 Note: Refer to Figure 1 while reading the below procedure. FM ALIGNMENT PROCEDURE 1.Connect an FM Signal Generator to Antenna Input. 2.Connect Distortion Analyzer to the TUNER IN/OUT RCA jacks. 3.Remove Top Cover and AM/FM TUNER Cover. Turn On the AC ro

24、cker switch. Press the red Standby button to turn the unit On. 4.Select Tuner with the Zone A selector knob. Put Tuner into FM mode and tune to 87.5MHz. 5.Adjust L5 (FM OSC Coil) for 3.5VDC at R46. 6.Tune to 108.5MHz and adjust C59 (FM OSC Trimmer Capacitor) for 24.5VDC at R46. 7.Repeat steps 4, 5 a

25、nd 6 as necessary for a tuning range of 3.5VDC to 24.5VDC at R46. 8.Tune the Generator and Tuner to 90MHz and adjust Coils: L2 (FM MIX), L3 (FM RF) and L4 (FM ANT) for best sensitivity. 9.Tune the Generator and Tuner to 104MHz and adjust Trimmer Capacitors: C60 (FM MIX), C62 (FM RF) and C63 (FM ANT)

26、 for best sensitivity. 10. Repeat 8 and 9 until no improvement in sensitivity is noted. 11. Tune Tuner to 90MHz with no RF Input and adjust T9 (FM DETector Primary) for zero volts between TP1 and TP2 relative (connector J6). 12. Tune the Generator to 90MHz and adjust the RF Output to 1000uV and 100%

27、 MONO modulation at 1000Hz. Then adjust T8 (FM DETector SECondary) for lowest distortion. 13. Reduce the Generator Output to minimum and detune the Generator so the Receiver picks up only noise, then recheck the voltage between TP1 and TP2 (connector J6). Adjust T8 and C65 if needed. If it is not 0+

28、/- 0.2VDC, repeat steps 11 and 12.If there is interference from a station on this frequency, tune the Tuner to a nearby frequency free from interference for this measure- ment. 14. Tune the Generator to 90MHz with a 1000uV output. Then switch the Generator to stereo (left only) and adjust T10 (FM IF

29、 Transformer) for the lowest distortion at the TUNER IN/OUT RCA jacks. 15. Switch the Analyzer to the right channel TUNER IN/OUT jack and adjust R71 (MPX SEParation Pot) for best separation (minimum output). 16. Switch the Generator to the Right Channel and the Analyzer to the Left Channel. Adjust R

30、71 (MPX SEParation Pot) and check for best separation (mini- mum output). 17. Disconnect voltmeter from TP1 and TP2 (J6). Reduce the generator output to 5uV and adjust R73 (STEREO SWITCH Pot) so the MPX light (Dot next to Signal Strength number) just comes on. 606261 8.Note the initial position of R

31、70, and then adjust R70 fully counter clockwise. Tune the Generator and Tuner to 1400kHz (20uV, 30% modulation), then Adjust T7 (AM IF) for maximum signal. 9.Tune the Generator and Tuner to 1400kHz (100mV, 30% modulation). Slowly adjust R70 clockwise until the MX134 front panel signal strength displ

32、ay reads “9”. 10. Check both channels for signal to noise performance, and re-adjust R70 and as needed. RadioFans.CN 收音机爱 好者资料库 TUNER 049084 9 6364 MX134 RadioFans.CN 收音机爱 好者资料库 TUNER 0490849 6566 RAA1 SECTION10 RadioFans.CN 收音机爱 好者资料库 6768 PARTS LIST Ref No.DescriptionPart No. 2 1INTERCONNECT TB1AC

33、 TERMINAL BLOCK07409100 F1FUSE, 1A SLO-BLO 5 X 2008910700 T1POWER TRANSFORMER15930200 DISPLAY PCB (CONTROL/LED/KEYBOARD SECTIONS) 049625 C4 C5 C6 C12 C13 C16 C25 C26 C27 C29CAP MONO .1UF 50V 20% Z5U06130500 C9 C10 C19 C20 C24CAP ELECT 47UF 35V06644600 C11 C17CAP MONO 1000PF 50V 10% NPO06130300 C14 C

34、15CAP MONO 33PF06128500 C21 C33 C50CAP ELECT 10UF 16V (4X5 CASE)06638200 C31 C32 C51 C56 C57 C58 C100CAP MONO .1UF 50V 20% Z5U06130500 C170CAP MONO 100PF 100V 10% NPO06130000 C200 C201 C202 C203 C204 C205 C206CAP MONO .01UF 50V 20% X7R06130400 C207 C208 C209 C210 C211CAP MONO .01UF 50V 20% X7R061304

35、00 D2DIODE ZENER 15V 1W07006100 D300 D301 D302DIODE SILICON07004700 DS1DISPLAY 12 CHARACTER05815000 DS2 DS3 DS4 DS5 DS6 DS7 DS8 DS9LED SQUARE RED05810900 DS10 DS11 DS12 DS13 DS14 DS15 DS16LED SQUARE RED05810900 DS17 DS31 DS36 DS39LED SQUARE RED05810900 DS18 DS19 DS20 DS21 DS22 DS23 DS24LED 2 SEGMENT

36、 YELLOW BAR05814600 DS25 DS26 DS27 DS29 DS30 DS32LED 2 SEGMENT YELLOW BAR05814600 DS33 DS35LED 3 SEGMENT ARRAY YELLOW05814700 DS34LED ARRAY(5) YELLOW RECTANGLE05812700 DS37 DS40LED 2 SEGMENT YELLOW BAR05814600 IC2IC VF ALPHANUMERIC CONTROLLER 13334700 IC2 IC3 IC12 IC15SOCKET IC 40-PIN17813300 IC3 IC

37、12IC DISPLAY DRIVER 4 DIGIT LED13326800 IC4IC OCTAL D-TYPE FLIP-FLOP13334800 IC4 IC6 IC7 IC13SOCKET IC 20 PIN17812400 IC5 IC10 IC17IC QUAD ANALOG SWITCH HI SPEED13334200 IC6 IC7IC OCTAL BUFFER 3-STATE13334900 IC11IC SRAM13322700 IC11SOCKET IC 28 PIN17812600 IC13IC OCT 3-STT NONINVERTING13322200 IC14

38、IC PROGRAMMED 13335013348000 IC14SOCKET IC 32 PIN17816500 IC15IC MICRO ROMLESS13338600 IC16MX132 PROGRAMMED 133266 IC1613337900 IC16SOCKET IC 24-PIN17813900 IC20PROGRAMMED 13340613344700 IC20SOCKET IC PLCC 84 PIN17817400 IC30 IC31 IC32IC QUAD 2-INPUT13319200 IC50IC 8 BIT A/D SERIAL OUTPUT13336600 IC

39、75IC CPU SUPERVISOR13342400 J1 J8 J10 J19CONN MALE 10 POS11721900 J2 J11CONN 12 PIN FFC11772000 J3CONN MALE 6 POS FRICTION LOCK11721800 J5CONN 10 PIN BOXED HEADER11779500 J9-CONN MALE 5 PIN 0.1 POST ASSY11721600 J20-CONN 9 PIN MALE11769500 J21-CONN 9 PIN FEMALE11769400 J25-CONN MALE 7 PIN11721700 J2

40、6-CONN 4 PIN11721500 LAMP1 LAMP2 LAMP3 LAMP4 LAMP5LAMP INCANDESCENT 14V 100MA05815300 LAMP6 LAMP7 LAMP8 LAMP9LAMP INCANDESCENT 14V 100MA05815300 MT1RECEIVER IR12104600 Q2TRANSISTOR PNP13222400 Q50TRANSISTOR NPN13222300 R1 R6 R201 R300RES MF 47.5K 1% 1/4W14410800 R5RES NETWORK 8X330 ISO14426300 R7RES

41、 MF 1.74K 1% 1/4W14435100 R8 R30RES MF 10 1% 1/4W14415700 R9 R24 R26 R27 R28 R29 R45 R200RES NET 2 X 22K ISOLATED14436600 R10RES NETWORK 5X47K BUSSED14425400 R12 R13 R14RES NETWORK 9 X 47K BUS14425000 R15 R18 R170 R171RES MF 4.99K 1% 1/4W14409800 R16RES MF 100 1% 1/4W14419600 R17RES MF 332 OHM 1% 1/

42、4W14444600 R25RES FP 47 OHM 5% 1/4W13704200 R50 R51 R52RES NETWORK 9X1K ISO14428000 R83RES FP 10 OHMS 5% 1/4W13702500 R100 R101RES MF 10K 1% 1/4W14405300 R102RES NETWORK 4 X 22K BUS14423400 R131RES NETWORK 8X10K BUSSED14425300 R150 R151RES NETWORK 4X1K ISO14427600 R202 R203 R204 R205 R206RES NET 2 X

43、 22K ISOLATED14436600 S1 S2SW TACT15005900 S5 S7 S9 S10 S11 S12 S13 S14 S15 S16SW TACT15005800 S17SW SLIDE14805900 S20 S21 S22 S23 S24SW ROTARY ENCODER 12 DTNT14625500 S25SW ROTARY ENCODER 24 PLS14625600 Y1CRYSTAL 11.0592MHZ18005100 SURROUND PCB 049627 C4 C5 C6 C12 C13 C16 C25 C26 C27 C29CAP MONO .1

44、UF 50V 20% Z5U06130500 C9 C10 C19 C20 C24CAP ELECT 47UF 35V06644600 C11 C17CAP MONO 1000PF 50V 10% NPO06130300 C14 C15CAP MONO 33PF06128500 C21 C33 C50CAP ELECT 10UF 16V (4X5 CASE)06638200 C31 C32 C51 C56 C57 C58 C100CAP MONO .1UF 50V 20% Z5U06130500 C170CAP MONO 100PF 100V 10% NPO06130000 C200 C201

45、 C202 C203 C204 C205 C206CAP MONO .01UF 50V 20% X7R06130400 C207 C208 C209 C210 C211CAP MONO .01UF 50V 20% X7R06130400 D2DIODE ZENER 15V 1W07006100 D300 D301 D302DIODE SILICON07004700 DS1DISPLAY 12 CHARACTER05815000 DS2 DS3 DS4 DS5 DS6 DS7 DS8 DS9LED SQUARE RED05810900 DS10 DS11 DS12 DS13 DS14 DS15

46、DS16LED SQUARE RED05810900 DS17 DS31 DS36 DS39LED SQUARE RED05810900 DS18 DS19 DS20 DS21 DS22 DS23 DS24LED 2 SEGMENT YELLOW BAR05814600 DS25 DS26 DS27 DS29 DS30 DS32LED 2 SEGMENT YELLOW BAR05814600 DS33 DS35LED 3 SEGMENT ARRAY YELLOW05814700 DS34LED ARRAY(5) YELLOW RECTANGLE05812700 DS37 DS40LED 2 S

47、EGMENT YELLOW BAR05814600 IC2IC VF ALPHANUMERIC CONTROLLER 13334700 IC2 IC3 IC12 IC15SOCKET IC 40-PIN17813300 IC3 IC12IC DISPLAY DRIVER 4 DIGIT LED13326800 IC4IC OCTAL D-TYPE FLIP-FLOP13334800 IC4 IC6 IC7 IC13SOCKET IC 20 PIN17812400 IC5 IC10 IC17IC QUAD ANALOG SWITCH HI SPEED13334200 IC6 IC7IC OCTAL BUFFER 3-STATE13334900 IC11IC SRAM13322700 IC11SOCKET IC 28 PIN17812600 IC13IC OCT 3-STT NONINVERTING13322200 IC14IC PROGRAMMED 13335013344400 IC14SOCKET IC 32 PIN17816500 IC15IC MICRO ROMLESS13338600 IC16M