McIntosh MPI4Maximum Performance Indicator Service Information.pdf

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1、Uftlntosb MPI-4 MAXIMUM PERFORMANCE INDICATOR SERVICE INFORMATION STARTING WITH SERIAL NO. A FI 001 f McIntosh laboratory inc. 2 chambers street binghamton, new york Mri-4 PERFORMANCE LIMITS MULTIPATH MODE OF OPERATION Sensitivity: 100mV/cm Frequency Response: DC to 50,000Hz ( - 3 d B) Input Impedan

2、ce: 250kQ Signal Strength Polarity: Selectable positive or negative STEREO MODE OF OPERATION Sensitivity - L (Vertical Amp.): 1.75mV rms/cm (5mV P-P/cm) - R (Horizontal Amp.): 1-75mV rms/cm (5mV P-P/cm) Frequency Response: 5Hz to 50,000Hz ( - 3 d B) Input Impedance: 250kP POWER LEVEL MODE OF OPERATI

3、ON Sensitivity: 0.1 to 1000 average watts for full scale indication (+3dB) in 9 calibrated steps. Frequency Response: 5Hz to 100,000Hz (-3dB) Input Impedance: 75kd Calibration: For bridging 4, 8 or 16 ohm speaker loads PREAMP LEVEL MODE OF OPERATION Sensitivity: 15mV rms for +3dB indication Frequenc

4、y Response: 5Hz to 50kHz Input Impedance: 250kn SWEEP MODE OF OPERATION Display modes: Left, right, or both (dual trace) Sensitivity: 1.6mV rms/cm (4.5mV P-P/cm) Frequency Response: 5Hz to 50kHz (-3dB) Input Impedance: 250kQ Sweep Frequency: 20Hz to 20kHz in 3 Decade ranges Sweep Expansion: .25X to

5、5X Sweep Trigger: The sweep is triggered only in the presence of an input signal. In the single trace mode it is triggered by the displayed wave form . LEVEL INDICATION MODE Norma 1 : 2 50 ps rise tj me 500ms decay time Peak : 250ps rise time 100 sec decay jt ime Manual reset LOW PASS FILTER 16kHz L

6、. P. Filter for stereo and sweep modes 19kHz and 38kHz rejected by at least 30dB RET ICLE LIGHTING Selectable: On-Off CRT 3 inch round tube, calibrated 5 x 6cm IkV accelerating potential AUTOMATIC INTENSITY CONTROL: In the absence of a horizontal signal, the intensity is reduced to prevent phosphor

7、damage. SEMICONDUCTOR COMPLEMENT: 2 integrated circuits 23 Transistors 10 Light emitting diodes 29 Diodes POWER SUPPLIES All are regulated to give equivalent perform ance for line voltages of 100 to 135 volts. POWER REQUIREMENTS 120 volts 50/60Hz 50 watts SIZE Front panel, 16 inches (40.65cm) wide b

8、y 5-7/16 (13.8cm) high. Chassis, 15 inches (38-lcm) wide by 5 inches (12.7cm) high by 13 inches (33.1cm) deep. Knob clear ance required, 1-1/2 inches (3.85cm) in front of mounting panel. WE I GHT 21 pounds (9.55kg) Net, 33 pounds (15kg) shipping. In the dual trace mode the trigger is selectable: Lef

9、t channel, right channel, or line frequency. LINE SIGNAL- DUAL TRACE SEPARATION CONTROL MODE SELECTOR SWITCHES (PARTIAL) MODE SELECTOR SWITCHES (PARTIAL) LOW PASS LOW PASS FILTER SWITCH | TRIGGER SOURCE TRIGGER* , SWEEP SWITCH AMP v GENERATOR SWEEP CONTROL SWEEP FREQUENCY SWITCHES VERTICAL DEFLECTIO

10、* HORIZONTAL POSITION CONTROL HORIZONTAL DEFLECi SWEEP EXPANSION CONTROL TO CRT BLOCK DIAGRAM MPI-4 DUAL TRACE SEPARATION CONTROL VERTICAL POSITION CONTROL IVERTICAL 1 AMP VERTICAL DEFLECTION MODE SELECTOR SWITCHES (PARTIAL) SWITCHING AMP HORIZONTAL FOCUS CONTROL CONTROL WORIZONTAp HORIZONTAL DEFLEC

11、TION INTENSITY CONTROL BLANKING TRIGGER AMP SWEEP GENERATOR AUTOMATIC INTENSITY CONTROL SWEEP CONTROL SWEEP FREQUENCY SWITCHES SWEEP EXPANSION CONTROL POWER AMP S4 SECTION I FRONT SECTION 3 FRONT 1 1 1 SPEAKER IMPEDANCE f U.SI C K * * ON cj Si q CM a * 8v OV r/ J 0.6V 7.5V OV | 0.6V 14 5V -12V 4V -I

12、OV -4V -12V 15 +1 5V 16 -ov lU|npr o.8v OV / t 0.6V o - iov OV J 0.6V 17 OV GND 18 -I5V 19 OV - 5V OV 20 nn,w -0.07V +0.07V ov f_rQ0,1 sv OV 21 ov -5V ov 22 AAJ Z -5V 23 AAJ. Z -2V 24 AX3-IZ -0.3V 25 6V 7 V 6V 26 6V 27 OV 15V OV +I5V / -15V 28 ov 0.26V OV +0.26V / -0.26V 29 v me 2z -v_ruT3m: 125V 30

13、 -AA3 -5v +15V -5V 31 OV - (F 200-2 K BUTTON NOT PRESSED OTHERWISE SIMILAR TO PIN 30 32 + 1 5V -vvq -i: +15V 33 +200V 34 +200V 35 o-3v AAA Z +15V -5V 36 200V FOR SWEEP CONTROL CW 20V FOR SWEEP CONTROL CCW 37 -5V 38 -5V 39 ov rVJJ ov 1-5V OV 40 5v UI_Q ,ov 15V 41 120V /1 / 90V |2v J-22V 12ov /A75 90V

14、 120V 42 1IV (DEPENDENT ON HORIZONTAL CONTROL 10V - 15V 1 ) 43 ov AA3- OV J |_J 0.15V o.ov /A73 OV 44 OV GND 45 11V (DEPENDENT ON HORIZONTAL CONTROL 10V - 15V ) 46 -vMYloov 120VI n re22v 120V ryTf loov 120V 47 1 1 OV fll|nlr 80V 1 1 OV rfSJ 60 V 1A0V TV3 50V nov /75 5v 130V 48 12V (DEPENDENT ON VERT

15、ICAL CONTROL jlV - 15V ) ) 49 OV 0.2V ov OV (-MP POLARITY) 0.2V (+MP POLARITY) 50 OV flf|nflf 0.7V OV r/j_$ 0.6V ov rV73-5v -0.2V (-MP POLARITY) OV (+HP POLARITY) 51 12V (DEPENDENT ON VERTICAL CONTROL 12V - 1 5V ) 52 110V VI 70V 1 1 OV 60V 8ov yVCH 5ov nov 50V 90V TSTR DUAL TRACE L SWEEP R SWEEP LEV

16、EL STEREO MULTIPATH Q1 c - *nnaa -4.3V X/ I 0.4V -i2v XyJ -lv mu:,8; -4.3V OR -12.3V XU 0JV 0R 04V B OV X/ j o.6v 6.5V ov Xv I o.6v E 1.1V XJ 0.6V 7.3V 1.1V X/ t 0.6V Q2 C ruuz -12.3V X/ J 0.1V -4.3V X/ I 0-4/ uiu;,8; -4.3V OR -12.3V XZ3-,V 0R 0,4V B OV * j $ 0.6V 6.5V ov X/ I o.6v E iv /J -6v 7.3V

17、1.1V X/ 1 o.bv Q3 C -.JUU,v -0.2V -I3V X/ 1 -lv JUQv OV OR “13V B -0.7V OV - * ira.o0; OV OR -0.7V E OV GND Q4 C rruz -13V X/ 1 0.1V -0.2V - UT3.v OV OR -13V B inx,. OV -0.7V iro-o0; OV OR -0.7V E OV GND Q5 C -OV 0.8V OV X/ J 0.6V 7.5V OV X/ j 0.6V B -5V VJ 0,5V -5V zj 0.4V -9.5V -5V X/ t 0.4V E -5.

18、7V Ulnftrj 0-5V -5.7 V XyJ 0-4V -10.2V -5.7V X/ 1 0.4V Q101 C -5V fUoflf 3.5V -5V X/ $ 2.5V - NXO;5; -5V X/ I 2.5V -4.5V B OV Ulnflf 0.7V OV J J 0.6V -0. IV / / $ 0.5V ov Xy I .5V -0.2V(-MP POLARITY) OV (+MP POLARITY) E i.iv TJinfifj o.8v i.i v X/ i -6v ,v AAA0-91 1.1V X/ j 0.5V 1.1V Q102 C -5-3v AA

19、A 4v -5-3vUTJ ,v -5.3V X/ t 4V “5.3V B OV SNB E 1 .IV _/|JJ 0.03V 1 .iv -UT.o,v 1.1V X / i 03V 1.1V Q103 C -5.3v Til#! 3.5V -5.3V XZ3 2.5V -6-5v AAA 2V -5.3 V XO 2V -6V B OV OV OV 0.2V ov OV (-MP POLARITY) 0.2V+MP POLARITY) E i.iv uinfiro.o3v l.lv X/ I 0.02V 1 .1V /I /I fo.Q2V l.lv X / I 0.02V 1 .IV

20、 Q104 C -5.3V xfPJ 4V 5-3VUO ,v -5.3V X / I 4V -5.3V B AAA -5v OV |_TJo.15V o.ov X/ I o.6v OV E i.iv AAA -5V 1.1V UXXJo.sv I.IV XyJ 0.5V 1.1V Q105 C 11 OV UjnflfJ 70V MOV X/ 1 60 V sov 7LOsov 11 ov XyJ 50V 90V B -5v uinlif 3.5V -SV Xj 2.5V - no.; -5v XyJ 2,5v -4.5V E -5.7V UlufU1 3.5V -5.7V 2.5 V -4

21、-5V JNJ 2.5V 5.7V XyJ 2.5V -5V Q106 C 12ov xPTVi ,oov 120V | | j 22V 1 20V X / I ,0V 120V B -5-3v AAA 4v -5.3V UO ,V -5.3V XyJ 4V -5.3V E -5.8V AAA 3-5V -5.8V XTQ IV -5.8v Xy I 4v -5.8V Q107 C 1 10V WS 80V 1 1 ov X / 1 60v i4ov XflTvl50V ov XyJ 5v 130V B -5.3V fU|nftf T 3.5V -5.3V X.V t 2.5V -6.5V y

22、iTQ2V -5.3v XyJ 4v -6 V E -5.8V ,U|nUJ 3V -5.8v XyJ ZV 7v AAA 2v -5.8V Xy I 2V -6.5 V Q108 C 120V AAA 90V 120V XHU 22V 120V XyJ 90V- 120V B -5.3V |X1 4V -5-3vUO ,v s.ij X/ i 4v -5.3V E -5.8V J 4V -5.8V UO ,v -5.8V X/ I 4V -5.8V Q109 C 5v ITLO lov 15V B -4v FUUAA uum -w UTJm OV E OV GND MPI-4 TSTR DU

23、AL TRACE L SWEEP R SWEEP LEVEL STEREO MULTIPATH Q201 C -JU rn * -7.5V B -1 ov r rl i v -7V E -tovx/VUfo.oiv -10V y/fi jO.IV -7.6V Q202 C run -r “-niQ-svv OV B -?v run6v -7.5V E -5 V Q203 C +uvinfj ,4-5virj +-55v + 15V B ,4-5vUn-8v 14.5V E +15V Q204 C -rue 3v 12V B 5.5V 7.2V 5.5V E sv jvje 2-sv 5V Q2

24、05 C +15V B 3V JUU 5V OV E sv rje -5v 6-5vrvje2-sv 5V Q206 C +15V B -5V E ov AAA+,!V -2-3vyio,4v -5.5V Q207 C iro +r runu6; -5V B 4.6V-UQ -5v -4.4V E -5V Q 208 C yiO. -5V B -ruiic.6v -i*.6v urn -“v -4.3V E -5V 1C 2 DUAL TRACE L SWEEP R SWEEP LEVEL STEREO MULTIPATH 1 OV 2 -5V 3 rue .5vv 6Hzrun -sv OV

25、 4 inrj -iv -2V 5 run-is runs; -2V 6 TJ-sv run -5vv -5V 7 -5V 8 jun-s OV -5V Jims -5V OR OV 9 rUQ4vv -5V OV , tn O -5V OR OV 10 ov - 5V ov 11 run ns 1 1 c -2 V 12 rum OV -5 V run.s -5V OR OV 13 ov -5V OV 14 ov SCHEMATIC NOTES 1. Unless otherwise specified: Resistance values are in ohms, 1/4 watt, an

26、d 10% tolerance; Capacitance values smaller then 1 are in microfarads (pF); capacitance values greater than 1 are in picofarads (pF); inductors are in microhenries (pH). 2. Printed circuit board components are outlined on the schematics by dotted lines. The circled numbers around the dotted lines co

27、rrespond to the numbers on the PC Board layouts. 3- The terminal numbering of rotary switches is for reference only. 4. All voltages indicated are measured under the following conditions: a. Use of an 11 megohm input impedance VTVM. b. Tuner Input: None c. Preamp Input: 10 MV rms, 1 kHz (Left Trim:

28、Sweep Frequency: Out Left Normal Norma 1 (XI) Fully clockwise 20 - 200 Refer to Voltage and Waveform chart for voltages at PC Board, transistor and 1C pins. Voltages change with the positions of the mode selector pushbutton switch. Voltages that are not affected by the mode selector are on the schem

29、atic diagram. All voltages are D.C. except those shown with an A.C. signal. If a pin has both a D.C. voltage and an A.C. signal the D.C. voltage is written first. 5- The voltages shown are typical and will not necessarily be the same for every unit. Variations of *25% are not unusual. 6. In units wi

30、th Serial Nos below AF2175 R57 R131 is 220K and C103 is . 022pF. i s 7. In units with Serial Nos below AF 1 588 C103 is 500K. s .2 2pF; R20 1 33K and R202 REPLACEMENT PARTS All parts not listed are common items obtain able from radio parts jobbers. Replacement parts may be obtained when ordered by P

31、ART NUMBER from: McIntosh Laboratory, Inc. Customer Service Department 2 Chambers Street Binghamton, New York 13903 (telephone 607-723-3512) CAPAC1 TORS Symbo1 Number Description Part N umber Cl ,2 Mylar . 22 pF 200V 064-043 C3,4 El ect 47pF 1 6 V 066-182 C9,10 Tant ilect 1 pF 5ov 066-242 Cl 1 , 1 2

32、 E1 ect 1 OOpF 16V 066-226 Cl 3, 14 E1 ect 47 pF 16V 066-182 C15 Elect lOpF 50V 066-222 C103 Mylar . 2 2 pF 250 V 064-068 C201 Elect lOpF 50V 066-222 C202 El ect lOOpF 16V 066-226 C206 Elect 470pF 6 V 066-197 C207 Mylar IpF 250V 064-088 C208,209 Mylar . 1 pF 250V 064-067 C210 Mylar .01 pF 250V 064-1

33、01 C21 1 El ect lOpF 50V 066-221 C 3 01 Paper . 33pF 1000V 064-109 C302.303 Paper . 1 pF 1600V 064-1 10 C304 Elect 1 6pF 350 V 066-196 C305 Mylar 1 pF 250V 064-067 C306,307 E1 ect 470pF 40V 066-134 C308 Elect 470pF 40V 066-134 C310,31 1 Elect 1 OOpF 1 6V 066-226 C31 2 Paper . 33pF 1000V 064-109 C314

34、 Mylar .IpF 200V 064-067 C315 Elect 47pF 16V 066-182 DIODES D1 ,2 Light emitting diode 070-056 D3,4 Light emitting diode 070-056 D5,6 L i ght emitting diode 070-056 D7,8 Light emitting diode 070-056 D9,10 Light emitting diode 070-056 DM,12 Si. s i gna1 diode 070-047 D1 3 ,14 Si. s i gna1 diode 070-0

35、47 Dl 5,16 Si. signa1 diode 070-047 D1 7,1 8 Si. si gna 1 diode 070-047 D19 Si. signa1 diode 070-047 D2I Zener diode 10V 070-024 D1 01 Si. si gna1 diode 070-047 D201,202 Si. signal diode 070-047 D203 Si. signal diode 070-047 D204 Zener diode 4.7V 070-057 D205.206 Si. s igna1 diode 070-047 D30I,302 D

36、 i ode 2000V 070-058 D303 D i ode 800V 070-059 D302,305 Zener diode 200V 070-060 D306,307 Zener diode 200V 070-060 D308 Zener diode 200V 070-060 D309 Bridge Rectifier 070-044 D 31 0 Zener diode 75V 070-025 D 31 1 Zener diode 1 20V 070-062 D312.313 Zener diode 15V 070-061 D 31 4 Si. si gna1 diode 070

37、-047 TRANSISTORS Q1 ,2 S i. PNP t ransistor 132-100 Q3,4 Si . PNP transistor 132-096 Q5 Si. NPN transistor 132-092 Q101,102 Si. PNP transistor 132-100 Q103.104 S i. PNP t ransistor 132-100 Q105,106 Si. NPN transistor 132-102 Q107,108 Si. NPN transistor 132-102 Q109 Si . NPN transistor 132-090 Q201,2

38、02 S i . NPN t ransistor 132-092 Q203 S i . PNP transistor 132-096 Q204,205 S i. NPN transistor 132-092 Q206 S i . NPN transistor 132-092 Q207 Si . NPN transistor 132-102 Q208 Si. NPN transistor 132-042 Q301 S i . NPN transistor 132-102 FUSES F30I Fuse 1/2A 089-009 POTENTIOMETERS R2 7 Signal strengt

39、h control 134-252 R28 Deviation control 134-252 R29 Audio trim control 134-252 R30 Audio trim control 134-252 134-251 R33 Gain control MPI-4 R71 Trace separation control 134-219 R1 09 Vertical control 134-244 R1 10 Horizontal control 134-244 R2 33 Sweep control 134-250 R229 Sweep expansion control 1

40、34-219 R31 4 Intensity control 134-248 R3I5 Focus control 134-249 SWITCHES SI Speaker impedance 148-033 S2 Multipath polarity 148-032 S3 Lo Pass filter 148-031 S4 Power level switch 146-161 S5 Level mode 148-034 S101 Trigger source 148-033 Si 02 Mode selector 150-011 S 30 1 Retic1e illumination 148-

41、031 TRANSFORMERS T 301 Power transformer 159-09! TUBES V 301 Cathode ray tube 165-062 INTEGRATED CIRCUITS 1C1 1ntegrated circuit 133-007 1 C2 Integrated circuit 133-008 LAMPS #1866 Front panel 058-014 #1866 Reticle i11umination 058-014 FRONT PANEL S- TRIM Front panel 044-439 Front panel end caps 018

42、-160 Sweep knob 044-429 Horizontal knob 044-429 Vertical knob 044-429 Intensity knob 044-429 Power 1 eve 1 knob 044-429 Gain knob 044-430 Focus knob 090-122 trace separation knob 090-121 Sweep expansion knob 090-121 Signal strength knob 090-121 Audio trim knob 090-121 Pushbutton 017-128 MISCELLANEOU

43、S ITEMS Plastic feet Shipping carton Push terminal strip Owners manual AC line cord Fuse holder Audio cable MOUNTING SYSTEM Shelf bracket (right) Shelf bracket (left) Mounting template #100 Hardware package MODULES LDR Network 017-156 044-538 074-030 038-788 170-021 170-033 176-135 043-622 043-623 038-179 044-440 144-042 15C0923S7-M5923-2