McIntosh Stereotech 1200 Receiver Service Information.pdf

STEREOTECH AM/FM RECEIVER SERVICE INFORMATION SERIAL NUMBER BKIOOI AND ABOVE 1200 PERFORMANCE DETAILS PREAMPLIFIER AND POWER AMPLIFIER POWER OUTPUT 50 watts minimum sine wave continuous average power out put, per channel, both channels operating into 8 ohms load im pedance. 30 watts minimum sine wave continuous average power out put, per channel, both channels operating into 16 ohms load im pedance. OUTPUT LOAD IMPEDANCE 8 ohms or 16 ohms RATED POWER BAND 20 Hz to 20,000 Hz TOTAL HARMONIC DISTORTION 0.2% maximum harmonic distor tion at any power level from 250 milliwatts to rated power per channel across 8 ohms or 16 ohms; both channels operating. INTERMODULATION DISTORTION 0.2% if instantaneous peak power output is twice rated power or less per channel with both channels operating for any combination of frequencies 20 Hz to 20,000 Hz FREQUENCY RESPONSE 20 Hz to 20,000 1 dB NOISE AND HUM Power Amplifier: 95 dB below rated output Tape 1 and Tape 2, Aux 1 and Aux 2: 89 dB below rated output Phono 1 and Phono 2: 70 dB below 10 mV input RATINGS DAMPING FACTOR 48 at 8 ohms output 96 at 16 ohms output INPUT SENSITIVITY AND IMPEDANCE Power Amplifier: 1.2 volts, 40,000 ohms Phono 1 and Phono 2: 3.0 mV, 47,000 ohms Tape 1 and Tape 2: 350 mV, 100,000 ohms Aux 1 and Aux 2: 350 mV, 100,000 ohms TAPE OUTPUT Preamp: 12 volts with rated input Tuner: 1.2 volts at 100% FM modulation Tape: 350 mV with rated input from low level inputs Phono: 1.2 volts with 10 mV input at 1000 Hz TONE CONTROLS: Bass +16 dB at 20 Hz. Treble + 16 dB at 20,000 Hz. L.F. FILTER: Active filter with 12 dB per octave roll off below 50 Hz, down 18 dB at 20 Hz. H.F. FILTER: Active filter with 12 dB per octave roll off above 7000 Hz, down 18 dB at 20,000 Hz. AM TUNER TUNING RANGE: 535 to 1605 kHz. SENSITIVITY: 75 juV IHF (external ant.) SIGNAL TO NOISE RATIO: 50 dB minimum (IHF,) 60 dB at 100% modulation. HARMONIC DISTORTION: Less than 1% (IHF.) IMAGE REJECTION: Greater than 60 dB 535 to 1605 kHz. FM TUNER TUNING RANGE: 87.5 to 108.5 MHz. USEABLE SENSITIVITY: 2.5 microvolts at 100% modulation (+75 kHz deviation) for 3% total noise and harmonic distortion (IHF). SIGNAL TO NOISE RATIO: 70 dB below 100% modulation. HARMONIC DISTORTION: Less than 0.5% mono and less than 0.7% stereo. AUDIO FREQUENCY RESPONSE: +1 dB 50 Hz to 10,000 Hz, 2 dB 20 Hz to 15,000 Hz. SELECTIVITY: 55 dB alternate channel minimum (IHF) SPURIOUS REJECTION: 90 dB minimum (IHF) IMAGE REJECTION: 70 dB minimum STEREO SEPARATION: 35 dB minimum at 1,000 Hz. SCA FILTER: 60 dB minimum GENERAL INFORMATION POWER REQUIREMENTS: 120 volts 50-60 Hz 50 watts at zero input, 320 watts rated output. SEMICONDUCTOR COMPLEMENT: 68 Transis tors; 4 FETs, 5 ICs, 39 Diodes. MECHANICAL INFORMATION SIZE: Front panel measures 17-1/2 inches wide (444 mm), by 5-5/32 inches high (131 mm). Chassis meas ures 16-15/16 inches wide (430 mm), by 4-5/8 inches high (117 mm), by 15-7/8 inches deep (403 mm) plus antenna. Knob clearance required is 1-1/2 inches (31 mm) in front of the mounting panel. WEIGHT: 33 pounds (14.97 kg) net, 39 pounds (17.69 kg) in shipping cartons. LOUDNESS TONE AMP NEG FEEDBACK I TONE CONTROL NEG FEEDBACK L TONE CONTROL! TONE AMP DIFFERENTIAL AMP y POWER CONTROLLER i SIGNAL 1 1_ STRENGTH ci_ _* RIGHT DE-EMPHASIS LEFT FM TO INPUT SELECTOR SWITCH RIGHT FM TO INPUT SELECTOR SWITCH BLOCK DIAGRAM FM ANT RI02 IM OOOK TRIOI 2SK4IE CI02 (2SKI9) 0.01 N. TRI02 2SK4IE Cl07 (2SKI9) 0.01 /TN 044458 FM TUI PC BOARD Rl09 LI 03 100 - * R105 VCIOl / 330 V * RIlO VCIOl / I TCI03 I 330 ii-1 C452 _L 4.7P / / TCI07 / J* 044461 MPX/AFL MUTING PCB AM ANT MAC 1200 TUNER SECTION R4I6 470 0415 I 0.02 C405 I/50V+20% f ,C407 . _ J 0.005 L40I C403 C404 0.02 0.04 C408 _ 3.3/25V - 20% S R40B I_1 L402 AM-FM TUNER 1200 fIfll TO +I6V 04461 MPX/AFL MUTING PCS 154-603 1200 1200 YELLOW PREAMP PC BOARD 044-462 FILTER AMP PC BOARD 044-466 + C 5 09 o 044462 PREAMP PC BOARD TO FM MPX PC BOARO OUT 6r 044462 PREAMP PC BOARD 1200 PREAMP MULTIPLEX 1200 J 044465 PUSHBUTTON SWITCH PC BOARD 154-605 LEFT CHANNEL OUT 1 RIGHT CHANNEL OUT -+ 40V 044465 1 PUSHBUTTON SWITCH I PC BOARD POWER OUTPUT PC BOARD 044-463 TR6050 GRAY GREEN t LEFT CHANNEL INPUT 044463 POWER OUTPUT PC BOARD C603o 47/50V C602a - - H6020 I20P 33K 2 C603b 4 7/ 50V RIGHT CHANNEI INPUT R60lb 4.7/35 V IOK C60lb HP- C602 b _ _R602b <| I20P 3 3K n 1200 i POWER OUTPUT C65 2 1200 044468 LAMP CONNECTION P C 8 (IN PART) -1(- 0802 SR3AM-6 Dgoi SR3AM-6 OR UD5C OR UD5C C803 0.01 C804 0.01 | 044469 , MAIN AMPLIFIER a | TUNER POWER SUPPLY PCB POWER SUPPLY LOCATION OF TRANSISTORS NOT ON PC BOARD VR607B R30 STEREOTECH 1200 ALIGNMENT INSTRUCTIONS TEST EQUIPMENT REQUIRED i fD o to LL to D U i_ cr fD i_ 0 CD o_ 0 -V i_ 4-J CO 0 4-J CO CD CD 21 CO to o 2 4-J CN CD c i_ . X CD CD - E 4-J o CD CD i_ E fD CD D O JL N in U fD o fD CD fD CL fD 2 CL 1 C _ _ 4-J < 4-J CD c 0 O . o 4-J 4-J 2 fD < fD < CD CD in c CD 3: CD CL CD . 0 Q ai c CL r 0 cn o 1 a. o c c c 0 cr to X! M _C E CD U u U i_ X CD 1 CD in fD i_ Ll 1 Z h- O X o CN CO -4 LA XS i- CD CD CD -C -C m - CD i -C C 4-J O 4-J cn 0 4-J E u . u fD CD O O M CD 0 4- E 1- C CD _C 0 4-J 4- 0 4- 2 0 0 CD . in JD CL TD i- 0 E CD CD i- 0 4 U in in CD CD 0 0 O 4-* U TJ O CD -CN -o i- 0 Cn. C JD CD -C 2 -C U o u TJ CD 00 CD 4- E CD 4- JD O cn cd i- 4-J 0 1-0 mi- . CD 4-J 4- 0 fD 4- Cj 1- 4-J tO fD cn 0 to - M- C -C , . U 0 <D u -C =3<-C -C CD 1-11- 1- E 0 O CD 4-1 o in 4- U c L CD M i_ 0 0 CD E 0 u 1- i_ CLT) C =3 CD 4- in 0 1-0 m 1- 0 CD CD C 0 Cl 4-J u 4-J CD CL C CD -C 0 4-J 0 i_ CD 2 m E , 0 0 c -CJD m JD cn U CD C CD O U1 L. _l_i. C O ID 0 CD 4-J 0 4-0 CD fD 1- l fD U X rn (D 0 4- 4- 4-J 4-J M- to m l D D CD U 0 0 0 C CD 4-J 1- 1- O 4 4- m fD 0 JD i- O U 4-J fD l_ . fD 0 0 0 4-* -i- (D C JD 2 CT4-J C 0) C CD CD E E Q. 4 C cn =3 cr O fD <D 0 in u r d) m 4- 0 - or 4-J u 4- C fD O 0) f- E =3 c CL U O u fD E O m fD =3 0 <t 0 U JD NO x c. 0 21 -C vD O 4- r. D 4-0 0 O -C O i/i c O 0 N 4-J D 31 fD a)-j <u i-vD C *4 - <D o cn <D <D C O 0 i- <j m- o 0 i- E u (D i/i l- 0 Ll 0 4-J 41 l/) L s i_ 0 4* “O in (D fD E 0 O 4-J< 0 fD -C i- 2 0 O C < in 0 0 < cn_D 2 z o < s CD JD CD -O C 0) O E 0 E 4-J JD 0 E 0 m 0 X m 0 E 0 O c 0 21 CL to O -4 O Lb Lb in 21 fD X 0 +- Cn.- D fD U CN =3 O C CD 0 l l an i- JZ cu m- I 4-J u O- u i fD O CD CD 4-j u cn 4-J c c C CD in 0 o o 0 o O 4J -4- CD CD U CL U in 0 i- 0 i- 4- CD N fD E O E o t 0 -J CD T) O C in 0) fD in O CD 4-j in in CD in i- 0 fD (D cr C 0 CD CD cn-C E - o in CD 4- O - or fD fD fD 2 fD X CD in fD cm 4- JD CD CL l- E 4-1 in fD fD 3 O CD CO O CL C (0 C O C -4 CD I - C Lb CL fD cn O CL 0 E 1- O 4-J 1- -C O CD | CN U 4-J o O ID L CL C 4- 0 CVI CO to CD 4-1 JD fD CD m CL in O CL a ub I < CD L C CD lOC ELA O CD E O O C i- O Li_ fD 4-J I CL 0 O 4-J CD m E i_ O o (D CD CD 3 -O 1 o 4-J _ m O O 4-J N un (DOT3 -C cn C I * fD 1/1 C CD C -C o l/l CD CD 0 10 XI 0 L_ -C cd in 4- 2 0 C in CD C CO c Dim l 0 vi CD O O O 4J 1- C 3 in Q. 3 3 0 0 cr r = CL4- CD CO M- +j 4-J L_ X CD 3 4J L. U- O C m 03 O CM 0 CD CD 1 Cl _1 CU -O 4J OI vi C X i- in Cl 3 CD O CD 21 fD O X 4-J M- 0 < CD 3 4- C - O O VI in C CD -l-J 3 CD U CD L 4-4- 3 -P CD E E 1-1- L- CD O 3 CD X) Cl -m fD ND L l/l D (D 4- _C JZ O CD C 3 O X (D - O O CD E E ro -E CD coo CD la in x CD C 4- 0 r-. cd X CD CD -C E in 3 4-J 4- 1- 1 tD 0 in C CD O c -M -M O 1- CD Q- 0 x ru c c c i/I O CD +J Q_ l/1t/1 E 0 1- X M fD (U i-OO i- X) o o 2 E REPLACEMENT PARTS TRANSISTORS Replacement Darts may be obtained when ordered by PART NUMBER from: Stereo Technology Division Box A Conklin, New York 13748 CAPACITORS Symbol Number Description Part Number C 8 51 ,852 Elect 6800pF 50V 066-207 DIODES D 1 01 Si . Si gna 1 diode 070-067 D1 S S i . Si gna 1 d i ode 070-068 D201,202 Si . Si gna 1 diode 070-068 D203,204 Si . Si gna 1 d i ode 070-068 D205.206 Ge. Si gnal diode 070-069 D207.208 S i . Si gna 1 diode 070-068 D301,302 Ge. Si gnal diode 070-069 D303.304 Ge. Si gnal diode 070-069 D305.306 Ge. Si gna 1 diode 070-069 D307 Si Si gna 1 d i ode 070-070 D401 Si . Si gan 1 d i ode 070-070 D501 a , b Si . Si gna 1 diode 070-070 D602 a, b Si . S i gna 1 d iode 070-070 D603a , b Si . S i gna 1 diode 070-070 D604a,b Si . Si gnal diode 070-071 D605a,b Si . Si gnal d iode 070-071 D607a,b Si . Si gna 1 d i ode 070-070 D651 Si . S i gnal diode 070-070 D652 Si . S i gnal diode 070-071 D801,802 Si . Si gna 1 diode 070-072 D803,804 Si . Si gna 1 diode 070-072 D805 Zener d i ode 070-074 D830 Zener diode 070-073 D 8 31,832 Si . Si gna 1 diode 070-071 CHOKES & COILS L302 67kHz Filter coil 122-146 L303 Mutinc fil ter coil 122-147 L401 AM RF co i 1 122-144 L402 AM Osc co i 1 122-145 L403 AM Antenna 122-143 TR101,102 T ransistor 132-107 TR103,104 T ransistor 132-108 TR201 T ransistor 132-109 TR301,302 T ransistor 1 32- 1 1 2 TR303.304 T ransistor 1 32-1 1 3 TR305,306 Transistor 132-113 TR307,308 T ransistor 132-113 TR309 T ransistor 132-113 T R 31 0,31 I T ransistor 132-114 TR 312,313 Transistor 132-115 TR314,315 T ransistor 132-1 1 2 TR31 6 T ransistor 132-112 T R 31 7 T ransistor 132-114 TR31 9 Transistor 132-114 TR401,402 T ransistor 132-110 TR403 Transistor 132-11 0 TR404 T ransis tor 132-111 TR501a,b T ransistor 132-1 17 TR502a,b T ransistor 132-118 TR503a,b T ransistor 132-113 TR601 a,b Transistor 132-114 TR602a,b T ransistor 132-114 TR603a, b T ransis tor 132-119 TR604a,b Transistor 132-112 TR605a ,b Transistor 132-120 TR606a,b T ransistor 132-119 TR607a,b T ransistor 132-121 TR608a,b T ransis tor 132-121 TR609a,b Transistor 132-122 TR610a,b T ransistor 132-123 TR651,652 T ransistor 132-124 TR653 T ransistor 132-125 TR 7 01 a,b T ransistor 132-1 1 3 TR702a,b T ransistor 132-114 TR703a,b T ransis tor 132-113 TR704a,b T ransistor 132-113 TR801 T ransis tor 132-126 TR831 Transistor 132-127 TR832 T ransistor 132-113 TR901a,b T ransistor 132-113 TR902a,b Transis tor 132-1 13 S S TH SW FUSES Fuse 3A 089-026 POTENTIOMETERS V R 5 5 1 Balance control 134-266 VR552 Volume control 134-267 VR901 Treble con t ro1 134-269 VR902 Bass control 1 34-268 T 1 0 I T20 I T 3 0 1 T 302 T 303 T 401 ,402 T80I RES ISTORS TH601a,b Thermistor SWITCHES S Input selector S Pushbutton switch TH SW1,2 Thermo cut-out TRANSFORMERS T10I FM IF transformer T20I FM IF transformer T301 19kHz transformer T302 19kHz transformer T303 38kHz transformer T401,402 AM IF transformer T801 Power transformer METERS M20I Tuning meter M401 Signal strength meter INTEGRATED CIRCUITS I C201,202 Integrated circuit IC203.204 Integrated circuit I C 2 0 5 Integrated circuit FILTERS CE. FIL201 FM IF FiI ter CE . FIL202 FM IF Fi1 ter CE. FIL203 FM IF Filter LPF MPX Filter LAMPS 144-043 146-164 150-014 153-016 162-063 162-064 I 62-066 162-067 162-068 162-065 159-107 1 24-023 124-024 133-009 133-009 133-009 180-013 180-013 180-013 180-014 PL 10,11 Panel 1 amp PL 12,13 Panel 1 amp PL14 Panel lamp PL 15 MON 1 amp PL 16 A FL 1 amp PL 1 7 MPX 1 am.p FRONT PANEL 6- TRIM Dial glass Front panel glass Front panel extrusion Left end cap Right end cap Tuning knob Vo 1ume knob Balance knob Input Se1. knob Bass knob front Bass knob rear Treble knob front Treble knob rear Pushbutton w/blu dot Pushbutton w/orn dot Pushbutton w/yel dot Pushbutton w/grn dot Pushbutton w/red dot Pushbutton w/wht dot MISCELLANEOUS ITEMS Plastic feet Shipping carton Owners manual Mounting instructions Pointer w/lamp J umpe r Top cover Hardware package 058-049 058-049 058-049 058-048 058-048 058-048 017-195 017-196 018-165 018-166 018-167 090-132 090-132 090-132 090-132 090-134 090-135 090-134 090-135 090-136 090-137 090-138 090-139 090-140 090-141 017-197 044-567 038-718 038-719 044-568 015-006 002-573 044-569 PL 1 ,2 Pushbutton lamp 058-050 PL3,4 Pushbutton lamp 058-050 PL 5,6 P ushbutton 1 amp 058-050 PL7 Pointer lamp 058-051 PL8,9 Meter lamp 058-049 MtMMUMmil 1200 STEREO TECHNOLOGY DIVISION BOX A CONKLIN, NEW YORK, 13740