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INTEGRATED AMPLIFIER
WA T TS
WA T TS
. 02 . 20 2.0
-40 -30 - 20
D E C IB EL S
20
-10
20 0
0
40
0
. 02 . 20 2.0
-4 0 -30 - 20
D E C I B EL S
20
-10
20 0
0
40
0
POWER OUTPUT
POWER OUTPUT
POW ER GUARD
B A SS
T R EB L E
LEFT R IG H T
B A LA N C E
L R
V O LU M E
CD 1
SE N S O R
CD 2
TUN ER
V ID E O
P H / AU X
TA P E
HE ADPH ON ES
MONO
1 S PE AK ER S 2
MU TE
LOUD
S TA N D B Y / O N
CONTENTS
Performance Specifications ........................................ 2 Notes ......................................................................... 3 Rear Panel .................................................................. 4 Section Location ........................................................ 4 Block Diagram ...................................................... 5 - 8 Interconnection Diagram .................................... 9 - 10 Input Driver Schematic and PCB ....................... 11 - 18 Heatsink Schematic and PCB ............................ 19 - 20 Lamp Schematic and PCB ................................. 19 - 20 PG Display Schematic and PCB ........................ 21 - 22 Control Schematic and PCB .............................. 21 - 22 Tone Schematic and PCB .................................. 23 - 26 Parts List ............................................................ 25 - 28 Exploded View and Parts List ............................. 29 - 31 Repacking Instructions ............................................. 33
SERVICE MANUAL
PREFORMANCE SPECIFICATIONS
POWER OUTPUT, STEREO 250, 200, 120 watts minimum sine wave continuous average power output per channel, both channels operating, into a load impedance of 2, 4 and 8 ohms respectively. TOTAL HARMONIC DISTORTION 0.005% maximum at any power level from 250 milliwatts to rated power per channel from 20Hz to 20,000Hz, both channels operating. INTERMODULATION DISTORTION 0.005% maximum if instantaneous peak power output per channel does not exceed twice the rated output with both channels operating for any combination of frequencies from 20Hz to 20,000Hz. OUTPUT LOAD IMPEDANCE 2, 4 or 8 ohms RATED POWER BAND 20Hz to 20,000Hz DYNAMIC HEADROOM 2.4dB at 2, 4 or 8 ohms DAMPING FACTOR 60 at 2 ohms 120 at 4 ohms 230 at 8 ohms FREQUENCY RESPONSE +0, -0.5dB from 20Hz to 20,000Hz SIGNAL TO NOISE RATIO, (A WEIGHTED) Phono Input: 90dB (84dB IHF) below 10mV input High Level: 100db (90dB IHF) below rated output Power Amplifier: 110dB below rated output SENSITIVITY Phono: 2.5mV for 2.5V rated output (0.5mV IHF) High Level: 250mV for 2.5V rated output (50mV IHF) Power Amplifier Input: 2.5V for rated output INPUT IMPEDANCE Phono: 47k ohms, 65pF High Level: 22k ohms MAXIMUM INPUT SIGNAL Phono: 90mV High Level: 8V POWER REQUIREMENT 120V, 50/60Hz, 5.0 Amps UL/CSA 230V, 50/60Hz, 2.5 Amps PREAMPLIFIER MAXIMUM VOLTAGE OUTPUT Phono: 90mV at tape output High Level: 8V at tape output Main Out: 8V at preamp output VOLTAGE GAIN High Level to Tape: 0dB High Level to Main: 20dB TONE CONTROLS Bass Control: +/-12dB at 20Hz Treble Control: +/-12dB at 10kHz POWER REQUIREMENTS 100 Volts, 50/60Hz at 4.8 Amps 110 Volts, 50/60Hz at 4.4 Amps 120 Volts, 50/60Hz at 4.0 Amps 220 Volts, 50/60Hz at 2.0 Amps 230 Volts, 50/60Hz at 2.0 Amps 240 Volts, 50/60Hz at 2.0 Amps
NOTE: Refer to the rear panel of the MA6500 for the correct voltage.
DIMENSIONS 17-1/2 inches (44.5cm) wide by 7-1/16 inches (17.9cm) high. Depth behind front panel is 18-1/8 inches (46cm) including connectors. Knob clearance required in front of the mounting panel is 1-1/8 inches (2.9cm).
2
MA6500
NOTES
1. The heavy lines on the schematics denote the primary signal path. 2. Unless otherwise noted, all 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 (10megaohm) voltmeter must be used. 3. Unless otherwise specified: a. Resistors values are in ohms. b. Capacitor values are in microfarads (uF). c. Inductor values are in microhenries (uH). 4. On PC Board Drawings, Square Pad Indicates: a. Polarized Capacitors - Positive b. Diode - Cathode c. Others - Pin 1 5. The voltages enclosed in a box are signal voltages that are measured with a 2.5mV, 1kHz signal connected to both channels at the TUNER input jacks. Front panel controls are set at: BALANCE .................................... CENTER DETENT TREBLE BASS ............................. CENTER DETENT INPUT SELECTORS ...................................... TUNER LOUDNESS .......................................................... OFF POWER ................................................................... ON VOLUME ................................. FULLY CLOCKWISE MONO ................................................................... OFF SPEAKER SWITCHES 1 AND 2 ........................... ON Rear panel controls are set at: PROCESSOR ........................................................OUT PWR AMP INPUT ................................................. INT SPEAKER TERMINALS .................... NO LOAD ON OUTPUTS 6. WARNING: Parts marked with the symbol have critical characteristics. Use ONLY replacement parts recommended by the manufacturer.
3
REAR PANEL
W A R N IN G A V IS
S H O C K H A Z A R D - D O N O T O P E N . FO R C O N T IN U E D P R O TE C TI O N A G A IN S T FI R E H A Z A R D R E P L A C E O N LY W IT H S A M E T Y P E A N D R AT IN G F U S E . R IS Q U E D E C H O C - E L E C TR IQ U E - N E PA S O U V R I R . R E M P L A C E R PA R U N F U S I B L E D E M E M E T Y P E , A M P E R A G E E T V O LTA G E . R IS K O F H A ZA R D O U S E N E R G Y ! M A K E P R O P E R S P E A K E R C O N N E C T IO N S . S E E O P E R AT IN G M A N U A L B E FO R E U S IN G .
M c IN TO S H LA B O R AT O R Y, IN C ., B IN G H A M T O N , N E W Y O R K M A D E IN U S A S E R IA L N UM B ER
M A 6 5 0 0 I N T E G R AT E D A M P L IF IE R
W A R N IN G
AV IS E N E R G IE E L E C T R IQ U E D A N G E R E U S E ! V O IR L E C A H IE R D 'I N S TR U C TI O N .
R IG H T
L E FT
R IG H T
L E FT
120V
5 0 /6 0 H z 4A
D ATA P O R T S
T 1 0A L 2 50 V S L O BL O
V ID E O TU N E R CD 2 CD 1
PO W ER A M P IN
M A IN OUT
TA P E O UT
TA P E
V ID E O
TU N E R
IN P U T S
CD 2
CD 1
P H /A U X
G ND
EXT SENSOR
PO W ER CO NTR OL SUM HO M E TA P E AUX
L
E X T IN T
L R
POW ER A M P IN P U T
L R
PH AUX
R
SECTION LOCATIONS
2 IN P U T /D R IV E R PCB
H E AT S IN K PCB
3
4
LAM P PCB
TO NE PCB
7
6 CONTROL PCB
5 P G D IS P L AY PCB
4
MA6500
BLOCK DIAGRAM
HEADCD1 CD2 LEFT CHANNEL INPUTS TUNER VIDEO TAPE AUX LOUDNESS PHONO R IAA AMP COMPENSATION CONTROL OUTPUT MUTING LOGIC TONE PHONO R IAA AMP LOUDNESS COMPENSATION CONTROL RIGHT CHANNEL INPUTS AUX TAPE VIDEO TUNER CD2 CD1 POWER CONTROL AUX TAPE DATA PORTS VIDEO TUNER CD2 CD1 SUM HOME EXT IR SENSOR DATA PORT REGISTER MICRO CONTROLLER IR SENSOR HEADPHONE AMP INPUT SELECTOR LOGIC 5.6V IN RUSH CURRENT 120VAC 50/60Hz MAIN FUSE LIMITER POWER TRANSFORMER RECTIFIERS AND FILTERS LAMP CONTROL LOGIC LAMP FUSE FRONT PANEL LAMPS 15V REGULATOR -15V REGULATOR 15V REGULATOR 5.6V INPUT ELECTROMAGNETIC SWITCHING MONO SWITCHING SUPER TRACKING VOLUME CONTROL 20dB AMP BALANCE CONTROL TONE AMP OUTPUT MUTING TO PREAMP IN (INT) PREAMP OUT RIGHT CONTROLS MATCHING NETWORK HEAD PHONE TURN-ON DELAY INPUT ELECTROMAGNETIC SWITCHING MONO SWITCHING SUPER TRACKING VOLUME CONTROL 20dB AMP BALANCE CONTROL TONE AMP OUTPUT MUTING TO PREAMP IN (INT) PREAMP OUT LEFT PHONE AMP
-15V
11.5VAC
MAIN THERMAL PROTECTION RELAYS
MAIN SUPPLY
B+ B-
5
6
BLOCK DIAGRAM
POSITIVE CURRENT LIMITER LEFT OUTPUT LEFT PG INDICATOR PG INDICATOR DRIVER POWER GUARD DIFF AMP CASCODE VOLTAGE AMP PREDRIVER
+
DRIVER
+
OUTPUT
+
SPEAKER SWITCHING
SPEAKER 1 SPEAKER 2
CURRENT SOURCE TO PRE AMP PRE AMP LEFT (INT) OUT (INT) PRE AMP IN (EXT) POWER AMP INPUT SWITCH ELECTRONIC ATTENUATOR DIFF AMP CASCODE VOLTAGE AMP
DC BIAS
PREDRIVER
-
DRIVER
-
OUTPUT
-
NEGATIVE CURRENT LIMITER
VOLTAGE LOG AMP
RECTIFIER
DC AMP
LEFT METER
NEGATIVE FEEDBACK TO MICRO CONTROLLOR
NEGATIVE FEEDBACK TURN ON DELAY NEGATIVE CURRENT LIMITER VOLTAGE LOG AMP DC AMP RIGHT METER THERMAL PROTECTION
RECTIFIER
DIFF PRE AMP IN PRE AMP RIGHT (INT) (EXT) TO PRE AMP OUT (INT) CURRENT SOURCE POWER AMP INPUT SWITCH AMP ELECTRONIC ATTENUATOR
CASCODE VOLTAGE AMP
PREDRIVER
-
DRIVER
-
OUTPUT
-
DC BIAS RIGHT OUTPUT CASCODE VOLTAGE AMP SPEAKER 1 SPEAKER 2
RIGHT PG INDICATOR
PG DRIVER
POWER GUARD
DIFF AMP
PREDRIVER
+
DRIVER
+
OUTPUT
+
SPEAKER SWITCHING
POSITIVE CURRENT LIMITER
7
8
MA6500
INTERCONNECT
9
100
2 INPUT DRIVER 049193 SH 1 OF 3
11
12
MA6500
2 INPUT DRIVER 049193 SH 2 OF 3
13
14
2 INPUT DRIVER 049193 SH 3 OF 3
15
16
MA6500
2 INPUT DRIVER
17
18
3A 3B
HEATSINK 049194
4A 4B
LAMP 049235
19
20
MA6500
5 PG DISPLAY 049236
6 CONTROL
049195
21
22
7 TONE 049268
23
240
MA6500
7 TONE 049268
PARTS LIST
PART NO DESCRIPTION REFERENCE NO 049193 INPUT DRIVER 003611 CARD MOUNTING BRACKET 061196 DISC CAP 47PF,20%,N470 50V 061199 DISC CAP 100PF 10% N1500 50V SP1 SP2 C146 C152 C157 C159 C58 C61 C72 C73 C74 C75 C76 C78 C140 C141 C156 C158 C32 C33 C55 C62 C63 C64 C65 C66 C67 C68 C69 C70 C71 C161 C162 C171 C172 C173 C174 C175 C129 C145 C165 C167 C166 C168 C47 C144 C115 C116 C132 C163 C164 C133 C134 C125 C127 C128 C126 C30 C85 C86 C87 C88 C89 C90 C91 C93 C94 C95 C96 C97 C98 C99 C100 C102 C103 C104 C105 C106 C115 C117 C118 C123 C124 C153 C154 C177 C92 C101 C22 C40 C119 C120 C121 066462 066469 066504 070047 ELECT CAP 1O UF 100VDC AMMO ELECT CAPACITOR 470MF 50V T&R CAPACITOR ELECT 25000UF 75V SILICON DIODE 1N4148 T&R C35 C36 C37 C38 C176 C142 C143 D1 D3 D4 D5 D6 D7 D8 D9 D10 D21 D22 D25 D26 D27 D2 D11 D12 D13 D14 D15 D16 D23 D24 D28 K2 K3 K4 K5 K6 K7 K8 K9 K10 K11 K12 K13 K16 K17 K18 K20 K1 K21 K24 K22 K23 F1 J3 J8 J1 J6 J7 J2 J4 J5 J23 J21 J22 J28 J24 J25 J26 J27 J10 J11 J12 J13 J14 J15 J16 J17 J18 J19 J2 J20 J9 L2 L3 Q50 Q62 Q64 132223 TRANSISTOR NPN MPS4124 2K/REEL Q44 Q46 Q47Q57 Q58 Q59 Q61Q63 Q66 Q75 Q78 Q79 Q80 Q81 Q83 Q87 Q88 Q1 Q40 Q48 Q49 Q52 Q69 Q73 Q74 Q76 Q77 Q54 Q55 Q56 Q67 Q68 Q71 Q85 Q86 Q2 Q51 Q53 Q65 Q70 Q72 Q18 Q82 Q17 Q84 IC1 IC3 IC16 IC17 IC5 IC6 IC7 IC14 IC10 IC13 IC9 IC11 IC12 IC2 IC4 IC15 IC8 R237 R238 R56 R60 R77 R79 R119 R230 R231 R232 R122 R134 R171 R217 R218 R265 R266 R267 R268 R269 R270 R271 R272 R45 R167 R168 R187 R36 R164 R170 R184 R241 R242 R249 R255 R262 R263 R264 R41 R55 R188 R193
132224 132254 132255 132261 132262 133028 133067 133108 133153 133154 133175 133180 133186 133260 133360 134389 137042 141165 144053 144071 144086 144090
TRANSISTOR PNP TRANSISTOR NPN TRANSISTOR PNP TRANSISTOR PNP TRANSISTOR NPN IC OPERATIONAL AMPLIFIER NE5534AN OP AMP LOW NOISE IC +5V REGULATOR IC REGULATOR -15V IC REGULATOR 15V IC AND 2 INPUT X 4 LB1720 8 LN DRIVER ARRAY IC SHFT REG SER-PAR DUAL OPERATIONAL AMPLIFIER OCTAL DAR TRANS ARRAY W/DIODE TRIM POT 100K,10%,3/8SQ. FLAMEPROOF RES 47 OHM 5% 1/4W RES CF 10 5% 1/2W RES MF 10K 1% 1/4W METAL FILM RES 365 OHM 1% 1/4W METAL FILM RES 475 OHM 1% 1/4W METAL FILM RES 1K 1% 1/4W
070130 070131 070139 087050
ZENER DIODE 8.2V,1/2W DIODE RECTIFIER RECTIFIER BRIDGE MC1000 REED RELAY FORM 1A,5V,500 OHMS
061248 061268
DISC CAP .1MF,25V,Y5T MONO CAP .1UF,50V,Z5U
061273 064254 064267 064312 064318 064364 066269 066309 066330 066344 066360 066361 066445
220PF 5% 100V NPO M POLY FILM CAP .1MF,10%,100V M. POLYESTER CAP .22MF,400V CAP M POLY .01UF 5% 63VDC CAP M POLY .033UF 5% 63/100VDC CAP POLYPROP .047MF 10% 250V CAP ELECT 1UF 10% 50V CAP ELECT 1000UF 10V CAP ELECT 220UF 16V SHORT CAN CAP ELECT 100UF 25V CAP ELECT 3300UF 35V CAP ELECT 1000UF 20% 35V ELECT CAP 10MF, 50V AMMO PACK
087057 087069 087072 089089 117215 117219 117244 117279 117404 117436 117455 117494 117549 117708 117712 117717 122297 132172 132193
RELAY POWER RELAY TV5 24V RELAY 24V TV8/VDE CERTIFIED FUSE 2A SLO-BLO 5X20 4-PIN CONNECTOR MALE CONN 10 POS FRICTION LK CONN 9POS MALE 11-POS. MALE CONN. HEADER 2-PIN 0.156 PJ261G PHON JACK, GOLD PHONO JACK 8P, GOLD PLATED MINI JACK HEADPHONE JACK DUAL BLACK 1/8 FASTON BLADE W/FEET FASTON BLADE .110 MTA-156 HEADER 8PIN CHOKE OUTPUT .65UH TRANSISTOR SI PNP MPSA55 TRANSISTOR J.F.E.T. 2N4392
066446 066447
ELECT CAP 47MF, 35V AMMO PACK ELECT CAP 100MF 16V AMMO PACK
144095
RES MF 3.32K 1% 1/4W
25 26
PARTS LIST con't
144097 144107 144108 METAL FILM RES 4.75K 1% 1/4W METAL FILM RES 40.2K 1% 1/4W RES MF 47.5K 1% 1/4W R46 R86 R177 R222 R227 R233 R234 R161 R192 R29 R62 R65 R66 R69 R175 R181 R182 R247 R251 R100 R162 R196 R228 R221 R226 R169 R190 R248 R257 R219 R223 R128 R172 R152 R156 R51 R53 R145 R146 R160 R186 R239 R240 R104 R105 R38 R101 R159 R173 R67 R68 R136 R137 R138 R139 R140 R141 R142 R144 R150 R245 R253 R246 R256 R147 R148 R258 R259 R1 R2 R3 R4 R5 R6 R7 R154 R243 R220 R224 R225 R229 R157 R205 R163 R194 R250 R252 R50 R165 R52 R158 R176 R178 R179 R195 R244 R254 R30 R37 R83 R166 R174 S1 S2 F1 049195 CONTROL 058153 INCANDESCENT LAMP 14V 100MA 061268 061273 061277 066254 066330 070093 MONO CAP .1UF,50V,Z5U 220PF 5% 100V NPO MONO CAP 0.1MF 20% 50V CAP ELECT 220UF 50V 20% CAP ELECT 220UF 16V SHORT CAN LED LAMP RED DS13 DS14 DS15 DS16 DS17 DS18 C3 C5 C6 C7 C10 C8 C9 C1 C2 C4 DS1 DS2 DS3 DS4 DS5 DS6 DS7 DS8 DS9 DS10 DS11 DS12 J4 J1 J3 MT1 IC1 IC3 IC4 IC2 IC6 R5 R16 R14 R15 R2 R4 R1 R6 R7 R8 R9 R10 R11 R12 R13 R19 R3 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11S12 IC5 Y1 133260 134457 134464 134490 144015 144053 144086 144090 144095 144107 144113 144157 144160 144195 144196 144298 144304 144364 DUAL OPERATIONAL AMPLIFIER POT, EQUAL POTENTIOMETER BALANCE 2KOHM POTENTIOMETER 50KAX2 METAL FILM RES 33.2K 1% 1/4W RES MF 10K 1% 1/4W METAL FILM RES 475 OHM 1% 1/4W METAL FILM RES 1K 1% 1/4W RES MF 3.32K 1% 1/4W METAL FILM RES 40.2K 1% 1/4W RES MF 100K 1% 1/4W METAL FILM RES 10 OHMS 1% 1/4W METAL FILM RES 22.1OH 1% 1/4W MF RES, 681 OHM 1% 1/4W METAL FILM RES 100 OHM 1% 1/4W MF 2.21K 1% 1/4W MF 2.74K 1% 1/4W RES MF 475K 1% 1/4W IC1 IC2 IC3 IC4 R33 R34 R32 R1 R23 R25 R9 R27 R14 R28 R6 R11 R13 R17 R21 R22 R39 R40 R12 R15 R16 R29 R36 R38 R8 R10 R2 R26 R5 R20 R35 R37 R30 R31 R3 R18 R19 R24 R4 R7
144113 144119 144125 144127 144141 144154 144160 144172 144187 144191 144196
RES MF 100K 1% 1/4W METAL FILM RES 332K 1% 1/4W METAL FILM RES 150K 2% 1/4W METAL FILM RES 95.3K 1% 1/4W METAL FILM RES 27.4K 1% 1/4W RES MF 12.1K 1% 1/4W METAL FILM RES 22.1OHM 1% 1/4W RES MF 221 OHMS 1% 1/4W METAL FILM RES 22.1K 1% 1/4W RESISTOR MF 1.21K 1% 1/4W METAL FILM RES 100 OHM 1% 1/4W
144210 144220 144225 144262 144264 144265 144273 144338 144378 144440 144441 144442 144443 148059 178159
RES MF 7.5K 1% 1/4W CRB1/4FX 95.3 OHMS 1% 1/4W MF MF RES, 30K OHM 1% 1/4W RES NETWORK, 2X220K, ISO METAL FILM RES 10M 1% 1/4W METAL FILM RES 2.21M 1/4W RESISTOR MF 182 OHM 1/4W 1% RES MF 324 OHM 1% 1/4W RES MF 2.21 OHM 1/4W 1% MF RES 14.3K 1% 1/4W METAL FILM RES 274K 1% 1/4W METAL FILM RES 47.5 1% 1/4W METAL FILM RES 681K 1% 1/4W SLIDE SWITCH FUSE HOLDER 5X20MM PCB MOUNT
117216 117279 117462 121031 133175 133186 133191 133241 133394 144053 144090 144113 144157 144196 144290 144338 144378 144444 150058 178139 180039
MALE CONN 5-PIN 0.1 POST ASSY 11-POS. MALE CONN. PHON JACK 1 1/8" STEREO VER IR SENSOR 38KHZ IC AND 2 INPUT X 4 IC SHFT REG SER-PAR IC DC MOTOR DRIVER IC MICROPRCSSR RESET POS PROGRAMMED DEVICE RES MF 10K 1% 1/4W METAL FILM RES 1K 1% 1/4W RES MF 100K 1% 1/4W METAL FILM RES:10 OHMS 1% 1/4W METAL FILM RES 100 OHM 1% 1/4W RES NETWORK 3 X 10K BUSSED RES MF 324 OHM 1% 1/4W RES MF 2.21 OHM 1/4W 1% METAL FILM RES 75 1% 1/4W TACT SWITCH IC SOCKET 24-PIN CERAM RESON 6.0MHZ W/CAP
049194 HEATSINK 061023 DISC CAP 100PF 10% N1500 061159 CERAMIC CAP .01MF +80-20% 50V 061248 DISC CAP .1MF,25V,Y5T 064363 CAP POLYPROP 0.15MF 10% 250VDC 066446 ELECT CAP 47MF, 35V AMMO PACK 070047 SILICON DIODE 1N4148 T&R 070133 DIODE 200V,6A 117213 2-PIN MALE CONNECTOR 117244 FRICTION LK CONN 9POS MALE 117404 HEADER 2-PIN 0.156 132223 TRANSISTOR NPN MPS4124 2K/REEL 132224 TRANSISTOR PNP 132261 TRANSISTOR PNP 132262 TRANSISTOR NPN 134390 TRIM POT 200 OHM 20% HORIZ AD 137093 MET OX 680 5% .5W 137094 MET OX 1.8K 5% .5W 137095 MET OX 430 5% .5W 137096 MET OX 47 5% .5W 139177 WIREWOUND RES 0.5 OHM 5W 5% 144053 144172 144279 144378 RES MF 10K 1% 1/4W RES MF 221 OHMS 1% 1/4W THERMISTOR 100 OHM RES MF 2.21 OHM 1/4W 1%
049235 LAMP 058120 LAMP 14V #7373 117240 4 PIN RT. ANGLE 117274 CONN. 2 POS. R-ANGLE 049236 POWER GUARD 058133 AMBER LED 058153 INCANDESCENT LAMP 14V 100MA 117215 4-PIN CONNECTOR 117216 MALE CONN 5-PIN 0.1 POST ASSY 049268 TONE 061191 DISC CAP 22PF,10%,NPO 50V 061196 DISC CAP 47PF,20%,N470 50V 061256 M.CAP 470PF,5%,100V 061260 MONOLYTHIC, 220PF 061268 MONO CAP .1UF,50V,Z5U 064254 064318 064329 066330 066345 066378 066445 066446 070047 087050 117219 117707 M POLY FILM CAP .1MF,10%,100V CAP M POLY .033UF 5% 63/100VDC CAP M POLY .22UF 5% 63VDC CAP ELECT 220UF 16V SHORT CAN CAP ELECT 22UF 50V CAP ELECT 47UF 16V BP ELECT CAP 10MF, 50V AMMO PACK ELECT CAP 47MF, 35V AMMO PACK SILICON DIODE 1N4148 T&R REED RELAY FORM 1A,5V,500 OHMS MALE CONN 10 POS CONNECTOR MALE 6 POS RT ANGLE
DS1 DS2 DS3 J1 J2
C7 C8 C9 C16 C3 C5 C10 C1 C2 D1 D2 D3 D4 D5 D6 D7 J3 J1 J2 Q1 Q2 Q7 Q6 R13 R2 R9 R6 R11 R7 R12 R31 R32 R33 R34 R35 R36 R37 R38 R3 R10 R1 R8 RT1 R30
DS1 DS2 DS3 DS4 J2 J3 J4 J1
C3 C4 C16 C17 C26 C27 C38 C39 C1 C2 C28 C30 C31 C33 C36 C37 C5 C6 C18 C19 C20 C21 C40 C41 C42 C43 C44 C45 C9 C12 C15 C7 C10 C11 C14 C34 C35 C22 C2324 C25 D1 D2 K1 K2 K3 J1 J2
27
280
MA6500
EXPLODED VIEW
29
30
EXPLODED VIEW PARTS LIST
Ref. No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 Part No. 016404 004899 018612 101042 171260 017531 017517 017736 078033 090258 104073 018605 101172 101054 018587 094350 017764 022314 017363 004966 049195 129284 100275 021030 078031 049236 021094 102001 124074 092341 092342 017447 049235 114072 159310 102007 004964 102003 004965 017218 104080 100159 101176 074091 104001 104004 102022 112038 021038 084135 106007 049194 Description
NOTES
FRONT PANEL GLASS EXTRUSION BRACKET END CAP TS 4-40 X 1/2 SLOT FILLISTER C/A INPUT/POWER SWITCH PUSHBUTTON ASSY RED PUSHBUTTON ASSY HEADPHONE BEZEL O-RING KNOB 25mm INDEX FELT W MPI-4 1/4 X 5/8 BOTTOM EXTRUSION TCS 6-32 X 1/4 PHIL FLAT U/C TS 6-32 X 1/4 PHIL PAN TAPTITE TOP EXTRUSION SENSOR GASKET DISPLAY PLEXIGLAS FISHPAPER SHEILD PLEXIGLAS FILTER LIGHT BLUE SUBPANEL CONTROL PCB ASSY TONE PCB ASSY MS 6-32 X 1/2 PHIL BLK TRUSS HD SPACER 6 X 1/4 GROMMET POWER GUARD DISPLAY ASSY SPACER 4 X 1/4 KEP NUT 4-40 CADMIUM PLATE MC202 METER FILTER AZURE BLUE FILTER PALE BLUE PLASTIC LIGHT BOX LAMP PCB ASSY PLASTIC RIVET POWER TRANSFORMER MACH NUT 1/4-20 W/LOCK TRAY MACH NUT 6-32 W/LOCK CHASSIS PLASTIC FEET - BLACK FLAT WASHER #10 CLEAR ZINC MS 10-32 X 3/4 PHIL PAN ZINC TCS 6-32 X 1/2 PH PAN BLK TYPE F AC TERMINAL BLOCK FLAT STEEL WASHER #4 X 9/32 X .025 LK WASHER 5 X .255 INT STAR MN 4-40 3/16 X 1/16 STL SPACER 4 X 3/8 L NICKEL PLT SPACER #6 X 3/8 THERMAL PAD MC7150 SPRING CLIP LATCH TYPE HEATSINK PCB ASSY
53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82
101059 114119 114118 112087 084194 018616 017160 049193 102014 110009 104130 104148 004800 100250 102020 104016 178122 117487 117369 101197 084124 084112 004962 101109 004798 101078 017706 100072 100126 094017
SM 6 X 5/8 PHIL PAN TYPE A TRANSISTOR CLIP 214 TRANSISTOR CLIP 218 PCB SPACER 1/4" ISOSTRATE AMPLIFIER HEATSINK 4 INCH MOUNTING TAB W/.140 DIA MTG INPUT/DRIVER PCB ASSY MACH NUT 6-32 W/LOCK NUT M5 X 0.8 BRASS W/GOLD PLATE LW #10 SPLIT PHOS/BRONZE FLAT WASHER BRASS OUTPUT PLATE SEMS 6-32 X 1/4 PHIL PAN MACH NUT 6-32 SELF-LOCK LK WASHER 1/2 X .630 X .022 INT STAR SOCKET FUSEHOLDER UL/CSA MC1000 AC LINE RECEPTACLE COAX RECEPTACLE GOLD TYPE F HI/LO 4-32 X 3/8 PH ROUND BLACK DUAL BINDING POST GROUND POST (GOLD) 4300 REAR PANEL TS 6-32 X 5/16 PHIL PAN TOP COVER TS 8-32 X 5/16 PHIL PAN TERMINAL COVER LOCK WASHER 1/4 X .396 INT STAR MS 1/4-20 X 5/8 PHIL PAN BLACK FOAM TAPE 1/4 X 1/4
31
32
REPACKING INSTRUCTIONS
33
INTEGRATED AMPLIFIER
SERVICE MANUAL
The continuous improvement of it's products is the policy of McIntosh Laboratory Incorporated, who reserve the right to improve design with out notice. Because of the constant upgrading of McIntosh products' circuitry and components, the Company cannot insure, and does not warrant, the accuracy of the within schematic material, which is intended for information only. McINTOSH LABORATORY, INC., 2 CHAMBERS STREET, BINGHAMTON, NEW YORK 13903 Printed in U.S.A. Part Number 040703