McIntosh-MX134-av-sm 维修电路原理图.pdf

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1、SERVICE MANUALPerformance Specifications . 2 - 3Notes . 3Rear Panel . 4Section Location . 4Block Diagram . 5 - 8Interconnection Diagram . 9 - 11Display Schematic and PCB . 12 - 19Surround Schematic and PCB . 19 - 34Data Schematic and PCB. 35, 36, 39 - 41S-Video Schematic and PCB. 42 - 47Video Schema

2、tic and PCB. 48 - 50Input Lamp Schematic and PCB . 51 - 56Component Video Schematic and PCB . 57 - 60Tuner AM/FM Alignment Procedure. 61 - 62Tuner/RAA1 Schematic and PCB . 63 - 66Parts List . 67 - 72Exploded Views and Parts Lists . 73 - 75Repacking Instruction . 77CONTENTSA/V CONTROL CENTERRadioFans

3、.CN 收音机爱 好者资料库PERFORMANCE SPECIFICATIONSFM TunerUseable Sensitivity14dBF which is 1.4uV across 75 ohms50dB Quieting SensitivityMono: 19dBF which is 2.4uV across 75 ohmsStereo: 35dBF which is 15uV across 75 ohmsSignal To Noise RatioMono: 75dBStereo: 70dBFrequency ResponseMono: +0, -1dB from 20 to 15,

4、000HzStereo: +0, -1dB from 20 to 15,000HzHarmonic DistortionMono: 0.3% at 100Hz, 0.3% at 1,000Hz, 0.3% at 10,000HzStereo: 0.45% at 100Hz, 0.45% at 1,000Hz, 0.65% at 10,000HzIntermodulaton DistortionMono: 0.25%Stereo: 0.45%Capture Ratio1.2dBAlternate Channel Selectivity75dBSpurious Response100dBImage

5、 Response75dBRF Intermodulation65dBStereo Separation45dB at 100Hz, 45dB at 1,000Hz, 35dB at 10,000HzSCA Rejection65dBAM TunerSensitivity20uV external antenna inputSignal To Noise Ratio48dB at 30% modulation58dB at 100% modulationHarmonic Distortion0.5% maximum at 50% modulationFrequency Response50Hz

6、 to 6kHz NRSCAdjacent Channel Selectivity45dB minimum IHFImage Rejection65dB minimum from 540 to 1600kHzIF Rejection80dB minimumAudioFrequency ResponseStereo: Left and Right Small speakers: 80Hz-20,000HzSubwoofer: 20Hz-80HzLeft and Right Large speakers: 20Hz-20,000HzSubwoofer: OFFPro-Logic II: (Movi

7、e Processing Mode)Left, Center, Right, Small speakers: 80Hz-20,000HzSurround Small speakers: 80Hz-7kHzSubwoofer: 20Hz-80Hz(Music Processing Mode)Left, Center, Right, Large speakers: 20Hz-20,000HzSurround Large speakers: 20Hz-20,000HzSubwoofer: OFFDolby Digital and DTS:Left, Center, Right, Large spea

8、kers: 80Hz-20,000HzSurround Large speakers: 20Hz-20,000HzSubwoofer: OFFLeft, Center, Right Large speakers: 20Hz-20,000HzSurround Large speakers: 20Hz-20,000HzSubwoofer: 20Hz-80HzExternal InputLeft, Center, Right, Left Surround, Right Surround:20Hz-20,000HzSubwoofer: 20Hz-20kHz (no LP filtering)Rated

9、 OutputAll Modes: 2.0Vrms for full bit digital inputInput Impedance22k ohms2RadioFans.CN 收音机爱 好者资料库31. The heavy lines on the schematic denote the primarysignal path.2. Unless otherwise noted, all voltages indicated on theschematics are measured under the following conditions:a. AC input at 120 volt

10、s, 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 - Positiveb. Diodes - Cathodec. Others - Pin 15.WARNINGParts marked with the symbol have criticalcharacteristics. Us

11、e only replacement parts recom-mended by the manufacturer.NOTESOutput Impedance47 ohms at all outputsMaximum Output Voltage9.5 VrmsTotal Harmonic Distortion0.005% at all outputsSensitivityAnalog Input: 400mV for 2.0V outputSignal To Noise Ratio All OutputsGreater than 90dB un-weighted. Greater than

12、100dB Aweighted. Greater than 98dB CCIR.Maximum Input SignalAnalog Input: 6VrmsVoltage GainAnalog Input to Output: 14DbFrequency Response+0, -0.5dB from 20Hz to 20,000HzTone Controls+12dB, -12dB from flat settingGeneral SpecificationsPower Requirements100 Volts, 50/60Hz at 65 watts110 Volts, 50/60Hz

13、 at 65 watts120 Volts, 50/60Hz at 65 watts220 Volts, 50/60Hz at 65 watts230 Volts, 50/60Hz at 65 watts240 Volts, 50/60Hz at 65 wattsNOTE: Refer to the rear panel of the MX134 for the correctvoltage.Overall DimensionsFront Panel: 17-1/2 inches (44.5cm) wide, 7-5/8 inches(19.37cm) high. Depth behind f

14、ront mounting panel is 21inches (53.3cm) including clearance for connectors. Panelclearance required in front of mounting panel is 1-1/8 inches(2.9cm).Weight32.5 pounds (14.8kg) net, 51.5 pounds (23.4kg) shippingweightPERFORMANCE SPECIFICATIONS contMX1344REAR PANELSECTION LOCATIONSTOP VIEW WITH COVE

15、R REMOVED56MX134BLOCK DIAGRAM78BLOCK DIAGRAM cont91110INTERCONNECTMX1341121413DISPLAY 049625 SH 1 OF 22ABC151716DISPLAY 049625 SH 2 0F 2MX1342ABC182019DISPLAY 049625CONTROL SECTION2ASURROUND 049627 SH 1 OF 63KEYBOARD SECTION2CLED SECTION2BSURROUND 049627 SH 2 OF 63212322MX1342426253SURROUND 049627 S

16、H 3 OF 62728SURROUND 049627 SECTION 4 OF 63MX1342930SURROUND 049710 SH 5 OF 63SURROUND 049627 SH 6 OF 633132MX134SURROUND 04962733334DATA 049622 SH 1 OF 243536MX134NOTES3738394140DATA 049622 SH 2 OF 24MX134S-VIDEO 049624 SH 1 OF 25424443454746S-VIDEO 049624 SH 2 OF 25MX134485049VIDEO 0496236515352IN

17、PUT 049621 SH 1 OF 27MX134545655INPUT 049621 SH 2 OF 27INPUT 0496217COMPONENT VIDEO 0497068MX134575958COMPONENT VIDEO 0497068TUNER ALIGNMENT PROCEDUREAM ALIGNMENT PROCEDURE1.Connect an AM Signal Generator to the RAA1 ”EXTANT” pin of the 5 pin connector. (Refer to Page 66.)Connect a Distortion Analyz

18、er to the MX134 rear panelTUNER IN/OUT RCA jacks.2.Tune to bottom of band, and adjust T11 (AM OSC Coil)for 3.0VDC at R46.3.Tune to top of band and adjust C64 (AM OSC TrimmerCapacitor) for 26.0VDC at Connector R46.4.Repeat steps 4 and 5 as necessary for a Tuning VoltageRange of 3.0 to 26.0VDC.5.Tune

19、the Generator and Tuner to 600kHz, then adjustCoils: T101 (AM ANT) and T12 (AM RF) for best sensitiv-ity. Note: Coil T101 (AM ANT) is located on the RAA1.It is labeled “L1”.6.Tune the Generator and Tuner to 1400kHz, then adjustTrimmer Capacitors: C106 (AM ANT) and C61 (AM RF)for best sensitivity. No

20、te: Trimmer Capacitor C106 (AMAMT) is located on the RAA1. It is labeled “C1”.7.Repeat 8 and 9 until no improvement in sensitivity isnoted.Figure 1Note: Refer to Figure 1 while reading the below procedure.FM ALIGNMENT PROCEDURE1.Connect an FM Signal Generator to Antenna Input.2.Connect Distortion An

21、alyzer to the TUNER IN/OUT RCAjacks.3.Remove Top Cover and AM/FM TUNER Cover. Turn Onthe AC rocker switch. Press the red Standby button toturn the unit On.4.Select Tuner with the Zone A selector knob. Put Tunerinto FM mode and tune to 87.5MHz.5.Adjust L5 (FM OSC Coil) for 3.5VDC at R46.6.Tune to 108

22、.5MHz and adjust C59 (FM OSC TrimmerCapacitor) for 24.5VDC at R46.7.Repeat steps 4, 5 and 6 as necessary for a tuning rangeof 3.5VDC to 24.5VDC at R46.8.Tune the Generator and Tuner to 90MHz and adjustCoils: L2 (FM MIX), L3 (FM RF) and L4 (FM ANT) forbest sensitivity.9.Tune the Generator and Tuner t

23、o 104MHz and adjustTrimmer Capacitors: C60 (FM MIX), C62 (FM RF) andC63 (FM ANT) for best sensitivity.10. Repeat 8 and 9 until no improvement in sensitivity isnoted.11. Tune Tuner to 90MHz with no RF Input and adjust T9(FM DETector Primary) for zero volts between TP1 andTP2 relative (connector J6).1

24、2. Tune the Generator to 90MHz and adjust the RF Outputto 1000uV and 100% MONO modulation at 1000Hz.Then adjust T8 (FM DETector SECondary) for lowestdistortion.13. Reduce the Generator Output to minimum and detunethe Generator so the Receiver picks up only noise, thenrecheck the voltage between TP1

25、and TP2 (connectorJ6). Adjust T8 and C65 if needed. If it is not 0+/-0.2VDC, repeat steps 11 and 12.If there is interferencefrom a station on this frequency, tune the Tuner to anearby frequency free from interference for this measure-ment.14. Tune the Generator to 90MHz with a 1000uV output.Then swi

26、tch the Generator to stereo (left only) and adjustT10 (FM IF Transformer) for the lowest distortion at theTUNER IN/OUT RCA jacks.15. Switch the Analyzer to the right channel TUNER IN/OUTjack and adjust R71 (MPX SEParation Pot) for bestseparation (minimum output).16. Switch the Generator to the Right

27、 Channel and theAnalyzer to the Left Channel. Adjust R71 (MPXSEParation Pot) and check for best separation (mini-mum output).17. Disconnect voltmeter from TP1 and TP2 (J6). Reduce thegenerator output to 5uV and adjust R73 (STEREOSWITCH Pot) so the MPX light (Dot next to SignalStrength number) just c

28、omes on.6062618.Note the initial position of R70, and then adjust R70 fullycounter clockwise. Tune the Generator and Tuner to1400kHz (20uV, 30% modulation), then Adjust T7 (AMIF) for maximum signal.9.Tune the Generator and Tuner to 1400kHz (100mV, 30%modulation). Slowly adjust R70 clockwise until th

29、eMX134 front panel signal strength display reads “9”.10. Check both channels for signal to noise performance,and re-adjust R70 and as needed.TUNER 04908496364MX134TUNER 04908496566RAA1 SECTION106768PARTS LISTRef No.DescriptionPart No.21INTERCONNECTTB1AC TERMINAL BLOCK07409100F1FUSE, 1A SLO-BLO 5 X 2

30、008910700T1POWER TRANSFORMER15930200DISPLAY PCB (CONTROL/LED/KEYBOARD SECTIONS) 049625C4 C5 C6 C12 C13 C16 C25 C26 C27 C29CAP MONO .1UF 50V 20% Z5U06130500C9 C10 C19 C20 C24CAP ELECT 47UF 35V06644600C11 C17CAP MONO 1000PF 50V 10% NPO06130300C14 C15CAP MONO 33PF06128500C21 C33 C50CAP ELECT 10UF 16V (

31、4X5 CASE)06638200C31 C32 C51 C56 C57 C58 C100CAP MONO .1UF 50V 20% Z5U06130500C170CAP MONO 100PF 100V 10% NPO06130000C200 C201 C202 C203 C204 C205 C206CAP MONO .01UF 50V 20% X7R06130400C207 C208 C209 C210 C211CAP MONO .01UF 50V 20% X7R06130400D2DIODE ZENER 15V 1W07006100D300 D301 D302DIODE SILICON07

32、004700DS1DISPLAY 12 CHARACTER05815000DS2 DS3 DS4 DS5 DS6 DS7 DS8 DS9LED SQUARE RED05810900DS10 DS11 DS12 DS13 DS14 DS15 DS16LED SQUARE RED05810900DS17 DS31 DS36 DS39LED SQUARE RED05810900DS18 DS19 DS20 DS21 DS22 DS23 DS24LED 2 SEGMENT YELLOW BAR05814600DS25 DS26 DS27 DS29 DS30 DS32LED 2 SEGMENT YELL

33、OW BAR05814600DS33 DS35LED 3 SEGMENT ARRAY YELLOW05814700DS34LED ARRAY(5) YELLOW RECTANGLE05812700DS37 DS40LED 2 SEGMENT YELLOW BAR05814600IC2IC VF ALPHANUMERIC CONTROLLER 13334700IC2 IC3 IC12 IC15SOCKET IC 40-PIN17813300IC3 IC12IC DISPLAY DRIVER 4 DIGIT LED13326800IC4IC OCTAL D-TYPE FLIP-FLOP133348

34、00IC4 IC6 IC7 IC13SOCKET IC 20 PIN17812400IC5 IC10 IC17IC QUAD ANALOG SWITCH HI SPEED13334200IC6 IC7IC OCTAL BUFFER 3-STATE13334900IC11IC SRAM13322700IC11SOCKET IC 28 PIN17812600IC13IC OCT 3-STT NONINVERTING13322200IC14IC PROGRAMMED 13335013348000IC14SOCKET IC 32 PIN17816500IC15IC MICRO ROMLESS13338

35、600IC16MX132 PROGRAMMED 133266 IC1613337900IC16SOCKET IC 24-PIN17813900IC20PROGRAMMED 13340613344700IC20SOCKET IC PLCC 84 PIN17817400IC30 IC31 IC32IC QUAD 2-INPUT13319200IC50IC 8 BIT A/D SERIAL OUTPUT13336600IC75IC CPU SUPERVISOR13342400J1 J8 J10 J19CONN MALE 10 POS11721900J2 J11CONN 12 PIN FFC11772

36、000J3CONN MALE 6 POS FRICTION LOCK11721800J5CONN 10 PIN BOXED HEADER11779500J9-CONN MALE 5 PIN 0.1 POST ASSY11721600J20-CONN 9 PIN MALE11769500J21-CONN 9 PIN FEMALE11769400J25-CONN MALE 7 PIN11721700J26-CONN 4 PIN11721500LAMP1 LAMP2 LAMP3 LAMP4 LAMP5LAMP INCANDESCENT 14V 100MA05815300LAMP6 LAMP7 LAM

37、P8 LAMP9LAMP INCANDESCENT 14V 100MA05815300MT1RECEIVER IR12104600Q2TRANSISTOR PNP13222400Q50TRANSISTOR NPN13222300R1 R6 R201 R300RES MF 47.5K 1% 1/4W14410800R5RES NETWORK 8X330 ISO14426300R7RES MF 1.74K 1% 1/4W14435100R8 R30RES MF 10 1% 1/4W14415700R9 R24 R26 R27 R28 R29 R45 R200RES NET 2 X 22K ISOL

38、ATED14436600R10RES NETWORK 5X47K BUSSED14425400R12 R13 R14RES NETWORK 9 X 47K BUS14425000R15 R18 R170 R171RES MF 4.99K 1% 1/4W14409800R16RES MF 100 1% 1/4W14419600R17RES MF 332 OHM 1% 1/4W14444600R25RES FP 47 OHM 5% 1/4W13704200R50 R51 R52RES NETWORK 9X1K ISO14428000R83RES FP 10 OHMS 5% 1/4W13702500

39、R100 R101RES MF 10K 1% 1/4W14405300R102RES NETWORK 4 X 22K BUS14423400R131RES NETWORK 8X10K BUSSED14425300R150 R151RES NETWORK 4X1K ISO14427600R202 R203 R204 R205 R206RES NET 2 X 22K ISOLATED14436600S1 S2SW TACT15005900S5 S7 S9 S10 S11 S12 S13 S14 S15 S16SW TACT15005800S17SW SLIDE14805900S20 S21 S22

40、 S23 S24SW ROTARY ENCODER 12 DTNT14625500S25SW ROTARY ENCODER 24 PLS14625600Y1CRYSTAL 11.0592MHZ18005100SURROUND PCB 049627C4 C5 C6 C12 C13 C16 C25 C26 C27 C29CAP MONO .1UF 50V 20% Z5U06130500C9 C10 C19 C20 C24CAP ELECT 47UF 35V06644600C11 C17CAP MONO 1000PF 50V 10% NPO06130300C14 C15CAP MONO 33PF06

41、128500C21 C33 C50CAP ELECT 10UF 16V (4X5 CASE)06638200C31 C32 C51 C56 C57 C58 C100CAP MONO .1UF 50V 20% Z5U06130500C170CAP MONO 100PF 100V 10% NPO06130000C200 C201 C202 C203 C204 C205 C206CAP MONO .01UF 50V 20% X7R06130400C207 C208 C209 C210 C211CAP MONO .01UF 50V 20% X7R06130400D2DIODE ZENER 15V 1W

42、07006100D300 D301 D302DIODE SILICON07004700DS1DISPLAY 12 CHARACTER05815000DS2 DS3 DS4 DS5 DS6 DS7 DS8 DS9LED SQUARE RED05810900DS10 DS11 DS12 DS13 DS14 DS15 DS16LED SQUARE RED05810900DS17 DS31 DS36 DS39LED SQUARE RED05810900DS18 DS19 DS20 DS21 DS22 DS23 DS24LED 2 SEGMENT YELLOW BAR05814600DS25 DS26

43、DS27 DS29 DS30 DS32LED 2 SEGMENT YELLOW BAR05814600DS33 DS35LED 3 SEGMENT ARRAY YELLOW05814700DS34LED ARRAY(5) YELLOW RECTANGLE05812700DS37 DS40LED 2 SEGMENT YELLOW BAR05814600IC2IC VF ALPHANUMERIC CONTROLLER 13334700IC2 IC3 IC12 IC15SOCKET IC 40-PIN17813300IC3 IC12IC DISPLAY DRIVER 4 DIGIT LED13326

44、800IC4IC OCTAL D-TYPE FLIP-FLOP13334800IC4 IC6 IC7 IC13SOCKET IC 20 PIN17812400IC5 IC10 IC17IC QUAD ANALOG SWITCH HI SPEED13334200IC6 IC7IC OCTAL BUFFER 3-STATE13334900IC11IC SRAM13322700IC11SOCKET IC 28 PIN17812600IC13IC OCT 3-STT NONINVERTING13322200IC14IC PROGRAMMED 13335013344400IC14SOCKET IC 32

45、 PIN17816500IC15IC MICRO ROMLESS13338600IC16MX132 PROGRAMMED 133266 IC1613337900IC16SOCKET IC 24-PIN17813900IC20PROGRAMMED 13340613344700IC20SOCKET IC PLCC 84 PIN17817400IC30 IC31 IC32IC QUAD 2-INPUT13319200IC50IC 8 BIT A/D SERIAL OUTPUT13336600IC75IC CPU SUPERVISOR13342400J1 J8 J10 J19CONN MALE 10

46、POS11721900J2 J11CONN 12 PIN FFC11772000J3CONN MALE 6 POS FRICTION LOCK11721800J5CONN 10 PIN BOXED HEADER11779500J9-CONN MALE 5 PIN 0.1 POST ASSY11721600J20-CONN 9 PIN MALE11769500J21-CONN 9 PIN FEMALE11769400J25-CONN MALE 7 PIN11721700J26-CONN 4 PIN11721500LAMP1 LAMP2 LAMP3 LAMP4 LAMP5LAMP INCANDES

47、CENT 14V 100MA05815300LAMP6 LAMP7 LAMP8 LAMP9LAMP INCANDESCENT 14V 100MA05815300MT1RECEIVER IR12104600Q2TRANSISTOR PNP13222400Q50TRANSISTOR NPN13222300R1 R6 R201 R300RES MF 47.5K 1% 1/4W14410800R5RES NETWORK 8X330 ISO14426300R7RES MF 1.74K 1% 1/4W14435100R8 R30RES MF 10 1% 1/4W14415700R9 R24 R26 R27

48、 R28 R29 R45 R200RES NET 2 X 22K ISOLATED14436600R10RES NETWORK 5X47K BUSSED144254003MX1346970PARTS LISTDescriptionPart No.54R7RES MF 1.74K 1% 1/4W14435100R8 R30RES MF 10 1% 1/4W14415700R9 R24 R26 R27 R28 R29 R45 R200RES NET 2 X 22K ISOLATED14436600R10RES NETWORK 5X47K BUSSED14425400R12 R13 R14RES N

49、ETWORK 9 X 47K BUS14425000R15 R18 R170 R171RES MF 4.99K 1% 1/4W14409800R16RES MF 100 1% 1/4W14419600R17RES MF 332 OHM 1% 1/4W14444600R25RES FP 47 OHM 5% 1/4W13704200R50 R51 R52RES NETWORK 9X1K ISO14428000R83RES FP 10 OHMS 5% 1/4W13702500R100 R101RES MF 10K 1% 1/4W14405300R102RES NETWORK 4 X 22K BUS1

50、4423400R131RES NETWORK 8X10K BUSSED14425300R150 R151RES NETWORK 4X1K ISO14427600R202 R203 R204 R205 R206RES NET 2 X 22K ISOLATED14436600S1 S2SWITCH TACT15005900S5 S7 S9 S10 S11 S12 S13 S14 S15 S16SWITCH TACT15005800S17SWITCH SLIDE14805900S20 S21 S22 S23 S24SWITCH ROTARY ENCODER 12 DTNT 14625500S25SW