McIntosh-MHT-200-Service-Manual(1) 电路图 维修手册.pdf

《McIntosh-MHT-200-Service-Manual(1) 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《McIntosh-MHT-200-Service-Manual(1) 电路图 维修手册.pdf（60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 - 7 Interconnection Diagram . 8 - 10 Display Schematic and PCB . 11 - 18 Keyboard Schematic and PCB .13, 17 - 18 Bottom Schematic and PCB. 19 - 24 Power Supply Schematic and PCB. 25 - 28

2、 Data2 Schematic and PCB. 29 - 32 Data1 Schematic and PCB. 33 - 36 Digital Schematic and PCB . 37 - 40 S-Video Schematic and PCB. 41 - 52 Composite Video Schematic and PCB . 53 - 58 Main Audio Schematic and PCB . 59 - 74 Multi Channel Schematic and PCB. 75 - 86 Amplifier Schematic and PCB. 89 - 104

3、Tuner AM/FM Alignment Procedure. 105 - 106 Tuner/RAA1 Schematic and PCB . 107 - 110 DSP Module PCB. 111 Backup Power Supply . 112 Exploded Views and Parts Lists . 113 - 114 Repacking Instruction . 115 CONTENTS A/V SYSTEM CONTROLLER RadioFans.CN 收音机爱 好者资料库 PERFORMANCE SPECIFICATIONS 2 Preamplifier an

4、d Processor Specifications Frequency Response Stereo: Left and Right Loudspeakers: +0-0.5dB from 20Hz-20,000Hz Music 1-4: Left, Center, Right Loudspeakers: +0-0.5dB from 20Hz- 20,000Hz Large Surround Loudspeakers: +0-0.5dB from 20Hz- 20,000Hz Pro-Logic: Left, Center, Right, Large Loudspeakers: +/-0.

5、5dB from 20Hz-20,000Hz Large Surround Loudspeakers: +1-3dB from 20Hz-6.3kHz Subwoofer1: 20Hz-140Hz Dolby Digital, DTS and External Input: Left, Center, Right Large Loudspeakers: +/-0.5dB from 20Hz- 20,000Hz Large Surround Loudspeakers: +/-0.5dB from 20Hz- 20,000Hz Subwoofer1: 20Hz-140Hz Rated Output

6、 2V for all channels Input Impedance 22k ohms Output Impedance Less than 560 ohms for all channels Maximum Output Voltage 8V Total Harmonic Distortion 0.05% for all channels Sensitivity Analog Input: 100mV IHF Dolby Level: 200mV Input External Input: 200mV for 2.0V Output Signal To Noise Ratio Great

7、er than 90dB A-weighted Maximum Input Signal Analog Input: 6Vrms Tone Controls +/-12dB from the flat setting 1 If any of the channels have the Loudspeaker Setting of Small, the subwoofer has a electronic low pass filter with a corner frequency of 80Hz and a 24dB per Octave roll-off in all modes exce

8、pt external. The Frequency Response of the Subwoofer Channel is also determined by the Crossover Setting. Power Amplifier Specifications Power Output Minimum sine wave continuous average power output per channel, all channels operating is: 100 watts into 4 ohm load, 70 watts into a 8 ohm load Rated

9、Power Band 20Hz to 20,000Hz Total Harmonic Distortion Maximum Total Harmonic Distortion at any power level from 250 milliwatts to rated power output is: 0.05% for 4 or 8 ohm load Dynamic Headroom 1.8dB Frequency Response +0, -0.25dB from 20Hz to 20,000Hz +0, -3dB from 10Hz to 1000,000Hz Sensitivity

10、1.0 Volt A-Weighted Signal To Noise Ratio 92dB (112dB below rated output) Intermodulation Distortion Maximum Intermodulation Distortion if instantaneous peak output per channel does not exceed twice the rated output, for any combination of frequencies from 20Hz to 20,000Hz, with all channels operati

11、ng is: 0.05% for 4 or 8 ohm loads Input Impedance 20,000 ohms Wide Band Damping Factor 100 at 4 ohms 200 at 8 ohms General Specifications Power Requirements 100 Volts, 50/60Hz at 8.4 Amps 110 Volts, 50/60Hz at 7.7 Amps 120 Volts, 50/60Hz at 7.0 Amps 220 Volts, 50/60Hz at 3.5 Amps 230 Volts, 50/60Hz

12、at 3.5 Amps 240 Volts, 50/60Hz at 3.5 Amps Note: Refer to rear panel of the MHT200 for the correct voltage. Dimensions Front Panel: 17-3/4 inches (45.09cm) wide, 9-7/16 inches (23.97cm) high. Depth behind front mounting panel is 19 inches (48.26cm) including clearance for connectors. Panel clearance

13、 required in front of mounting panel is 1-1/8 inches (2.9cm). Weight 73 pounds (33.1kg) net, 87 pounds (39.5kg) shipping 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, all voltages indicated on the schematics are measured unde

14、r 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 - Positive b. Diodes - Cathode c. Others - Pin 1 5.WARNING Par

15、ts marked with the symbol have critical characteristics. Use only replacement parts recom- mended by the manufacturer. NOTES 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

16、 Signal To Noise Ratio Mono: 75dB Stereo: 70dB Frequency Response Mono: +0, -1dB from 20Hz to 15,000Hx Stereo: +0, -1dB from 20Hz 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 Distort

17、ion Mono: 0.25% Stereo: 0.45% 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 Sensitivity 20uV External Antenna Input Signal To Nois

18、e 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 540Hz to 1,600kHz IF Rejection 80dB minimum PERFORMANCE SPECIFICATIONS cont M

19、HT200 RadioFans.CN 收音机爱 好者资料库 REAR PANEL SECTION LOCATIONS 4 9 COMPOSITE VIDEO PCB 6 DATA1 PCB 13 TUNER TM1 (OPTIONAL)5 DATA2 PCB 3 BOTTOM PCB 4 POWER SUPPLY PCB 2B KEYBOARD PCB 7 DIGITAL PCB 8 S-VIDEO PCB 10 MAIN PCB 12B AMP PCB (BACK) 12A AMP PCB (FRONT) 2A DISPLAY PCB 11 MULTI CHANNEL PCB 15 DSP

20、MODULE 16 BACKUP POWER SUPPLY PCB 14 RAA1 RAA1 141516 SEE INTERCONNECT TOP VIEW WITH COVER REMOVED 576 BLOCK DIAGRAM MHT200 AUDIO BUFFERS LEFT LISTEN AND RECORD INPUT SWITCHING TAPE LEFT AND RIGHT OUTPUT SWITCHING AUDIO BUFFERS AUX CD1 DVD TUNER VCR1 VCR2 AUX CD1 DVD TUNER TV VCR1 VCR2 RIGHT LISTEN

21、AND RECORD INPUT SWITCHING TIME DELAY S/PDIF RECEIVER BITSTREAM SELECTOR CROSSOVER FILTERS LEFT INPUT BUFFER CENTER INPUT BUFFER RIGHT INPUT BUFFER L SUR INPUT BUFFER R SUR INPUT BUFFER LCRSUB EXT PROCESSOR INPUT CONTROL MICRO L SUR VOLUME R SUR VOLUME SUB VOLUME RIGHT VOLUME CENTER VOLUME LEFT VOLU

22、ME ANALOG SWITCHING DIGITAL INPUT SWITCHING A B C D E F COAX DRIVER OPTICAL DRIVER TV LEFT CHANNEL VCR1 VCR2 VCR1 VCR2 RIGHT CHANNEL CONVERTER CONVERTER CONVERTERA (COAX) B (COAX) C (COAX) D (OPTICAL) E (OPTICAL) F (OPTICAL) AUX CD SAT TV DVD VCR1 2 CH A/D R L ANALOG INPUTS OPTICAL COAX DIGITAL OUTP

23、UTS IR MICRO FRONT PANEL SENSOR ZONE B IR DATA ZONE A IR DATA CONTROL LOGIC DSP MODULE CONTROL RS232 FRONT PANEL PUSHBUTTONS FRONT PANEL ROTARY SWITCHES FRONT PANEL VOLUME TUNER CONTROL ZONE B VOLUME CONTROL FRONT PANEL DISPLAYS INPUT SWITCHING POWER CONTROL CONTROL MICRO EIGHT CHANNEL VOLUME/TONE C

24、ONTROL CONTROL MICRO DATA DRIVERS TUNER AUX CD1 CD2 TAPE1 TAPE2 SAT TV LV VCR1 VCR2 DVD ZONE A DATA DECODER ZONE B DATA DECODER DD / DTS / PRO LOGIC II DECODER L BSUR INPUT BUFFER R BSUR INPUT BUFFER SLSRBSLBSR BSL VOLUME BSR VOLUME CD2 TUNER TAPE1 AUX TV LV VCR1 DVD ZONE A ZONE B SUM A+B SUBWOOF IN

25、PUT BUFFER OUTPUT MUTING OUTPUT MUTING OUTPUT MUTING OUTPUT MUTING OUTPUT MUTING OUTPUT MUTING LEFT FRONT CENTER RIGHT FRONT SUBWOOFER OUTPUT MUTING OUTPUT MUTING LEFT BACK SURROUND RIGHT BACK SURROUND ZONE A 8 CHANNEL OUTPUT LEFT SURROUND RIGHT SURROUND ZB LEFT VOLUME ZB RIGHT VOLUME OUTPUT MUTING

26、OUTPUT MUTING LEFT RIGHT ZB OUTPUT DSP EXT PROCESSOR SWITCHING LCRSUB SLSR BSL BSRLCRSUB SLSR BSL BSR L C R SUB LS RS BSL BSR 8 CHANNEL D/A DIFF AMP VOLUME AMP PREDRIVER DRIVER OUTPUT POWER GUARD GAIN ELECTRONIC ATTENUATOR PG INDICATOR DRIVER PG INDICATOR CURRENT SOURCE DC BIAS DIFF AMP VOLUME AMP P

27、REDRIVER DRIVER OUTPUT NEGATIVE CURRENT LIMITER POSITIVE CURRENT LIMITER NEGATIVE FEEDBACK DC SENSING RELAY DRIVE TURN ON DELAY OUTPUT RELAY 1 INPUT ONE CHANNEL SHOWN OUTPUT TUNED CIRCUIT 88 108MHz TUNED CIRCUIT 88 108MHz TUNED CIRCUIT 88 108MHz FM OSCILLATOR 98 7 118 7 MHz LOCAL OSCILLATOR DOUBLE B

28、ALANCED MIXER BALANCED IF TRANSFORMER 10 7 MHz LINEAR PHASE FILTER 10 7 MHz IF AMP LINEAR PHASE FILTER 10 7 MHz IF AMP LINEAR PHASE FILTER 10 7 MHz AM OSCILLATOR 970 2160 kHz AM MIXER FM ANT RF AMP EXT AM ANT ROD ANTENNA 520 1710 kHz TUNED CIRCUIT 520 1710 kHz RF PLL LF FILTER 450 kHz IF AMP AM DETE

29、CTOR LIMITER DETECTOR MPX MPX FILTER MPX FILTER R L OUTPUTS STEREO BLEND RAA1 REMOTE AM TUNER OPTIONAL AM/FM TUNER CONTROL MICRO FET CASCODE AMP FET RF AMP TUNING AMP L AUDIO AMP R AUDIO AMP OSD ON/OFF SWITCH OSD ON/OFF SWITCH VIDEO SWITCHING SAT TV DVD VCR1 VCR2 SAT TV DVD VCR1 VCR2 ON SCREEN DISPL

30、AY MODULE CONTROL MICRO AUX CD1 AUX CD1 ZONE A AND B COMPOSITE VIDEO SWITCHING ZONE A AND B SUPER VIDEO SWITCHING ZONE A COMPONENT VIDEO SWITCHING COMPONENT 1 COMPONENT 2 MONITOR A MONITOR B VCR1 VCR2 MONITOR A VCR2 VCR1 COMPOSITE VIDEO OUTPUTS SUPER VIDEO OUTPUTS VIDEO AMP VIDEO AMP VIDEO AMP VIDEO

31、 AMP VIDEO AMP VIDEO AMP VIDEO AMP TAPE OUT ELECTRONIC SWITCHING TAPE OUT ELECTRONIC SWITCHING TAPE OUT ELECTRONIC SWITCHING TAPE OUT ELECTRONIC SWITCHING COMPONENT VIDEO OUTPUT FUSE LINE VOLTAGE POWER SUPPLY POWER CONTROL AMPLIFIER POWER TRANSFORMER 12VAC LAMPS RECTIFIERS AND FILTERS BACKUP POWER S

32、UPPLY 5V 15V 15V 6VAC VFD FILAMENT 33VDC TUNER 29VDC VFD 53 VDC AMP 53VDC AMP AMPLIFIER SAT SAT 8109 INTERCONNECT1 2A DISPLAY 1 X2 1 X6 1 X18 X5 X1 1 X15 1 X20 X18 X17X5 X1 X3 3BOTTOM 2B KEYBOARD X5 5DATA2 X12 6 DATA1 X4 7 DIGITAL X12 8 S-VIDEO X17 9 COMPOSITE VIDEO 10 MAIN AUDIO 1 X11 1 1 X33X31X32

33、 1 X10 11 MULTI CHANNEL 11 1J5 12B AMP(BACK) 1 X7 4 POWER SUPPLY 1 X6 X9 J3 X8 1 X4 67 1 X3 X2 1 J6J8 J2J11 J18 J12 11 J16 J9 J13 J10J20 1 1 J4 J14 1 J5 1J1 1 J15 1 J17 BULB2 20 19 GND GND GND +15A GND 29V F L2 BULB2 BULB2 BULB1 HP L HP R JACKSW 15A GND +12V FIL1 BULB1 BULB1 L2U GND GND +5D IRDATA L

34、3U L1U GND 25 2 1 25 2 S3U CU S7U S6U S5U S4U S2U S1U L2D GND GND +5D 2 IRDATA L3D L1D GND S3D CD S7D S6D S5D S4D S2D S1D 1 SEL 0 -RESET IRDATA GND FP IRDATA OE 0 GND +5VA GND MISO OUT2 GND -5VA 39 0 IN1 SELECT 0 ZONE IR DATA B +5V IR DATA A +5V OUT1 MOSI SCLK +5D DISABLE A SELECT 2 SELECT 1 DISABLE

35、 B -SLOT SELECT6 +12V HOME GND GND GND GND GND GND GND GND GND GND GND 1 GND +5D GND GND 39 40 DISABLE A SELECT 0 GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND IR DATA A +5V IR DATB B +5V SELECT 1 SELECT 2 DISABLE B HOME ZONE GND GND GND GND GND GND GND 1 GND +5D GN

36、D GND 39 40 DIGITALOK GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND RXD GND DIGINM BBCONN DIGINP BBCONN -INTERRUPT0 DIGITAL SELECT 1 TXD GND GND GND GND GND GND GND DIGITAL SELECT 0 DIGITAL SELECT 2 GND 1 MOSI GND GND 39 0 GND GND GND GND GND GND GND GND GND GND GND GND SCL

37、K OUT2 IN1 -RESET OUT3 -INTERRUPT2 -SLOT SELECT2 CS VIDEO SW OUT MISO OUT1 SER V MOSI VIDEO SCLK CS VIDEO TO OUTBUF GND GND GND GND GND GND GND ENA VIDEO LATCH SEL 1 NC NC 8 X11 1 GND GND 39 40 GND GND GND GND GND GND GND GND GND GND GND GND GND OE 0 GND GND GND GND GND CS VIDEO SW OUT SEL 0 GND VID

38、EO SCLK CS VIDEO TO OUTBUF GND GND GND GND GND GND GND ENA VIDEO LATCH SEL SER V MOSI GND GND 1 39 40 1 6 AMP LS AMP RS AMP C AMP BACK AMP R AMP L GND GND GND GND GND GND AMP ZONE R AMP ZONE L GND GND AMP Z L GND AMP Z R GND GND 1 TUNERL GND GND TUNERR 1 TUNERMUTE SCLK PLL CE MPXINDICATOR INDENTDATA

39、OUT5 1 SCANSTOP SIGNALSTRENGTH 40 SCLK +5VA GND SEL 0 OE 0 FP IRDATA IRDATA RESET MOSI IN1 GND 5VA GND OUT2 GND MISO GND GND GND GND DISABLE A OUT1 IR DATA A +5V IR DATA B +5V ZONE SELECT 0 SELECT 1 SELECT 2 GND +5D GND GND GND SLOT SELECT6 GND DISABLE B GND HOME GND +12V 1 X14 40 GND +5D GND IR DAT

40、A A +5V GND IR DATA B +5V GND SELECT 0 SELECT 1 GND GND GND GND GND GND GND GND GND GND GND GND SELECT 2 GND DISABLE A GND DISABLE B GND HOME ZONE GND GND GND GND GND GND GND GND GND GND GND 1 X4 40 GND +5D GND DIG NM BBCONN GND DIGINP BBCONN GND GND GND GND GND GND GND GND GND GND GND GND GND GND R

41、XD GND DIGITALOK INTERRUPT0 DIGITALSELECT0 DIGITALSELECT1 DIGITALSELECT2 TXD GND GND GND GND GND GND GND GND GND GND GND GND 1 40 IN1 MOSI MISO SCLK OUT1 OUT2 OUT3 INTERRUPT2 RESET GND GND GND GND GND GND GND GND GND GND CSVIDEO SW OUT SLOT SELECT2 GND SER V MOSI ENA VIDEO VIDEO SCLK LATCH SEL CSVID

42、EO TO OUTBUF GND GND GND GND GND GND GND GND GND GND 1 0 GND SER V MOSI ENA VIDEO LATCH SEL VIDEO SCLK SEL 0 OE 0 GND CSVIDEO SW OUT GND GND GND GND GND GND GND GND GND GND GND GND GND CSV DEO TO OUTBUF GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND 1 0 OUT2 SLOTSELECT SERIALCLK MISO MO

43、SI IN1 OUT1 GND IDENTCLK BULB1 MIC+ +5D +5D GND INTERRUPT RESET GND OUT3 IRDATA IDENTDATAOUT HP R FIL1 +12V GND 15A JACKSWGND BULB2 BULB2 BULB2 FIL2 29V GND +15A GND GND HP L GND 1 0 MAIN LB JACKSW HP R MAIN L MAIN C MAIN R MAIN LS MAIN RS MAIN RB +5VA CHANNEL10 BB GND HP L GND GND GND CHANNEL9 BB G

44、ND AMP Z R AMP Z L SCLK +15A MUTEMAIN RESET OUT2 OUT1 MOSI IN1 MAIN SW GND GND GND GND INTERRUPT3 GND GND OUT3 +5D SLOT SELECT3 FIL1 POWER CTRL BULB2 BULB1 FIL2 CENTER DELAY DRIVE -15V -29V +15A 12 +33V GND DELAY DRIVE -15A GND +15A DELAY DRIVE -15A GND +15A 1 1 +15 +5 +5 GND GND -15 RELAY CONT 12VA

45、C 2 12VAC 1 6VAC 2 6VACTAP 6VAC 1 7 RELAY DRV 6 76VAC1 1 FIL1 POWER CTRL BULB2 BULB1 FIL2 CENTER DELAY DRIVE -15V -29V +15A 12 +33V GND +53V -53V -53V GND GND +53V 1 11 6VAC2 WT VO BK T1 GY VO/WT BK/GY 76VAC TAP 76VAC2 76VAC1 12VAC2 12VAC1 6VAC TAP 6VAC1 1X1 J1 J2 L N 50/60Hz 120V RT2 NC NC NC NC NC

46、 NC 11 1J5 12A AMP(FRONT) J6J8 J2J11 J18 J12 11 J16 J9 J13 J10J20 1 1 J4 J14 1 J5 1J1 1 J15 1 J17 +53V 53V +53V 53V +53V 53V +53V 53V J19 +53V 53V +53V 53V +53V 53V +53V 53V COM COM BS RS RF ZBR COM COM COM COM C LS LF ZBL COM COM TB2 LEFT FRONT +- TB4 CENTER +- TB5 RIGHT FRONT +- TB3 LEFT SURROUND

47、+- TB6 RIGHT SURROUND +- TB7 BACK SURROUND +- TB8 ZB LEFT +- TB9 ZB RIGHT +- RT1 t t TEMP RELAY DRV RELAY CONT 76VAC TAP 76VAC2 J3- 13 J5- TUNER J4- NC 5V 33V TUNER IR DATA 15V DATA GND LT GND PLL CE TUNER DATA MPX RT PLL CLOCK TUNER MUTE SCAN STOP SS VOLTS D1 ACAC + X1 1 +15 +5 +5 GND GND 15 PS1 320149SP OUTPUTS DELAY DRIVE 15A GND +15A PG_LIGHT1 PG_LIGHT2 PG LIGHT3 PG LIGHT4