McIntosh MDA1000 User manual

SERVICE MANUAL
Performance Specifications ........................................ 2
Notes ......................................................................... 2
Rear Panel .................................................................. 3
Section Location ........................................................ 4
BlockDiagram ...................................................... 5 - 6
Interconnection Diagram ...................................... 7 - 8
Main Schematic and PCB................................... 9 - 18
Keyboard Supply Schematic and PCB ............... 19 - 20
Display Schematic and PCB .............................. 21 - 22
Dataport Schematic and PCB ............................ 23 - 24
Parts List ............................................................ 25 - 30
ExplodedView and Parts List ............................. 31 - 32
Repacking Instructions ............................................. 33
CONTENTS
D/A CONVERTER

PERFORMANCE SPECIFICATIONS
2
1. The heavy notes on the schematic denote the primary
signal path.
2. Unless otherwise noted, all voltages indicated on the
schematics are measured under the following conditions:
a. ACinputat120volts,50/60Hz.
b. All voltages are +/-10% with respect to ground. A
high impedance (10 megaohm) voltmeter must be used.
3. Unless otherwise specified:
a. Resistor values are in ohms.
b. Capacitorvaluesaremicrofarads(uF).
c. Inductor values are in microhenries (uH).
4. On PC board drawings, Square pad indicates:
a. PolarizedCapacitors-Positive
b. Diodes - Cathode
c. Others - Pin 1
5. WARNING
Parts marked with the symbol have critical
characteristics. Use only replacement parts recom-
mended by the manufacturer.
NOTES
Analog Audio Specifications
FrequencyResponse
+/-0.5dBfrom4Hzto45,000Hz
(SamplingFrequency –96kHz and 88.2kHz)
+/-0.3dBfrom4Hzto22,000Hz
(SamplingFrequency – 48kHz)
+/-0.3dBfrom4Hzto20,000Hz
(SamplingFrequency –44.1kHz)
+/-0.3dBfrom4Hzto15,000Hz
(SamplingFrequency – 32kHz)
TotalHarmonicDistortion
0.002%at1,000Hz
SignalToNoiseRatio
Better than 110dB (AWeighted)
DynamicRange
Betterthan 100dB(1,000Hz)
RatedOutputVoltage
2V Unbalanced Outputs (Bypass On Mode)
6V Unbalance Outputs (Bypass Off Mode)
2V Balanced Outputs (Bypass On Mode)
6V Balanced Outputs (Bypass Off Mode)
Digital Audio Specifications
DigitalAudioFormat
IEC958,S/PDIF
CoaxialInputs(1,2and3)
0.5Vp-p @75ohms
OpticalInputs(4,5and6)
-15~-20dBm
XRLInput(7)
5Vp-p @110ohms
SamplingFrequencies
96kHz,48kHz,44.1kHzand32kHz
General Specifications
PowerRequirements
100Volts50.60Hz, 20watts
110Volts50/60Hz,20 watts
120Volts50/60Hz, 20watts
220Volts50/60Hz, 20watts
230Volts50/60Hz, 20watts
240Volts50/60Hz, 20watts
Note: Refer to the rear panel of the MDA1000
for the correct voltage.
OverallDimensions
Width is 17-1/2 inches (44.45cm), Height is 6 inches
(15.24cm)including feet, Depth is16-1/8 inches
(40.96cm) including Front Panel and Knobs
Weight
24 pounds (10.89kg) net, 38 pounds (17.24kg) in
shipping carton

3
MDA1000
TOP AND REAR PANEL

4
SECTION LOCATIONS
TOP VIEW WITH COVER REMOVED
5
DISPLAY
PCB
6
2
DATAPORT
PCB
MAIN
PCB
3
UPSAMPLING
PCB
4
KEYBOARD
PCB
TRANSFORMER

5 6
BLOCK DIAGRAM
MDA1000
LEFT +
I/V
CONV.
LEFT -
I/V
CONV.
RIGHT +
I/V
CONV.
RIGHT -
I/V
CONV.
LEFT +
24BIT
D/A
CONVERTER
LEFT +
24BIT
D/A
CONVERTER
LEFT -
24BIT
D/A
CONVERTER
LEFT -
24BIT
D/A
CONVERTER
RIGHT +
24BIT
D/A
CONVERTER
RIGHT +
24BIT
D/A
CONVERTER
RIGHT -
24BIT
D/A
CONVERTER
RIGHT -
24BIT
D/A
CONVERTER
BCK
LRCK
LD ATA
RD ATA
LRCK
DATA
BCK
MCK
RESET
MICROCONTROLLER
DISPLAY
DRIVER
INPUT
LEVEL
SELECT
SETUP
CONTROLS
POWER
CONTROL
RELAY
STANDBY
LOW VOLTAGE
SUPPLY
POWER
TRANSFORMER
FUSE
POWER
SWITCH
120VAC
50/60Hz
POWER
CONTROL
IN
OUT
POWER
CONTROL
5V
3.3V
15V
5V
-5V
-15V
DIGITAL
LOW VOLTAGE
SUPPLY 5V
3.3V
DISPLAY
ANALOG
VOLTAGE
SUPPLY
V. F.
DISPLAY
IR INPUT
IR
SENSOR
DATA INPUT
1
2
3
4
5
6
7
DATA
PORT
DATA PORT
DRIVER
DIGITAL
INTERFACE
RECEIVER
XLR
DIFFERENTIAL
AMP
3
1
2
6
5
4
COAXIAL
COAXIAL
COAXIAL
OPTICAL
OPTICAL
OPTICAL
7
DIGITAL INPUT
LEFT
BALANCED
LEFT
UNBALANCED
+
-
RIGHT
BALANCED
+
-
OUTPUTS
RIGHT
UNBALANCED
MUTE
RELAY
MUTE
RELAY
MUTE
RELAY
MUTE
RELAY
MUTE
RELAY
MUTE
RELAY
LEFT +
BALANCED
AMP
LEFT -
BALANCED
AMP
RIGHT +
BALANCED
AMP
RIGHT -
BALANCED
AMP
LEFT
DIFFERENTIAL
AMP
RIGHT
DIFFERENTIAL
AMP
LEFT +
FILTER
LEFT -
FILTER
RIGHT +
FILTER
RIGHT -
FILTER
LEFT
BALANCED
OUTPUT
LEVEL
CONTROL
RIGHT
BALANCED
OUTPUT
LEVEL
CONTROL
BYPASS
CONTROL
RELAY
BYPASS
CONTROL
RELAY
BYPASS
CONTROL
RELAY
BYPASS
CONTROL
RELAY
S/F
DIVIDER
768KHz
UPSAMPLING
MODULE

7 8
INTERCONNECT
1
KEYBOARD
DISPLAY
MAIN
2
5
4
3
DATAPORT
6
NS5V GND DATA GND SCLK GND LCLK GND GND GND REM GND
1
J1
GND STBY/ON GND STBY/LED NS5V GND REM GND SETUP SETUP LED KBLED GND
1
J1
GND STBY/ON GND STBY/LED NS5V GND REM GND SETUP SETUP LED KBLED GND
1
J2
INPUT CCW INPUT CW SETUP LED REM LEVA
LEVB
NC
SETUP
STBY/ON DI CE GND -29V GND 5VD FIL1
BLK CL NS5V GND GND GND FIL2
1
J1
NS5V GND DATA 1 GND SCLK1 GND LCLK1 GND GND GND REM GND
1
J13
AC14V
INPUT CCW INPUT CW
AC26VCT
REM
LEVA
LEVB
BYPASS LED
SETUP BLK SCLK2 NS5V
AC6V
AC26V
AC26V
AC14VCT
STBY/ON DATA 2 LCLK2 GND
AC6V
SETUP LED
AC14V
1
J6
J9
1
6
120V B
20V B
0V B
120V A 100V A
0V A
J10
1
6
J11
1
6
J12
1
6
1
8
J14
240V
220V
100V
120V
120V B
20V B
0V B
120V A 100V A
0V A
120V B
20V B
0V B
120V A 100V A
0V A
120V B
20V B
0V B
120V A 100V A
0V A
J8 J7
BLK
S1
POWER
WHT
ORN
VIO
GRY BLU
BLK
GRN
GRN
YEL
BLU
YEL
RED
BLK
RED
ORN
WHT
VIO
GRY
BLU
BLK
T1
WHT BLK
120V AC
50/60Hz
MODULE
049999
GRN
GRN
YEL
BLU
YEL
RED
BLK
RED
GND GND GND FIL
-29V GND 5VD FIL
AC H AC L

MAIN 049988 SH 1 OF 4
2
MDA1000
910

11 12
MAIN 049988 SH 2 OF 4
2

13 14
MDA1000
MAIN 049988 SH 3 OF 4
2

MAIN 049988 SH 4 OF 4
2
15 16

17 18
MAIN 049988
2
MDA1000
MODULE
O49999
3

19 20
KEYBOARD 049990
4
1.9V
1.9V
5V
GND
GND
GND
GND
S2
S1
SENSOR
GND
REM
NS5V
3
1
2
Q1
DS2
DS3
10uF
C1
10
R1 C3
.1uF
75
R2
213
Vcc
Vout
GND
MT1
DS1
J1:1
STBY/ON STANDBY/ON
J1:6
SETUP SETUP
J1:9
KBLED
J1:8
J1:11
J1:5
J1:3
J1:2
STBY LED
J1:10
J1:12
J1:7
SETUP LED
47uF
C2
J1:4
5J2:8
5J2:2
5J2:5
5J2:6
5J2:1
5J2:3
5J2:4
5J2:7
5J2:9
5J2:10
5J2:11
5J2:12
R1
DS1 DS3
R2
129485
Q1 C1 C2
C3
J1
MT1
S1
DS2
S2
*
*
* Denotes components on the reverse or backside of the Pc Bd
Rev.A

21 22
DISPLAY 049989
5
MDA1000

23 24
DATAPORT 049991
6

25 26
MDA1000
PARTS LIST
Ref. No. Description Part No.
1MAIN PCB 049988
C1 CAP MPF 0.01UF 5% 63VDC 064312
C2 CAP MONO .1uF 50V 20% Z5U 061305
C3 CAP MONO .1uF 50V 20% Z5U 061305
C4 CAP ELECT 47UF 25V 066413
C5 CAP MPF 0.022UF 5% 63VDC 064316
C6 CAP ELECT 47UF 25V 066413
C7 CAP MPF 0.01UF 5% 63VDC 064312
C8 CAP MPF 0.01UF 5% 63VDC 064312
C9 CAP MPF 0.01UF 5% 63VDC 064312
C10 CAP MPF 0.01UF 5% 63VDC 064312
C11 CAP PF 0.001UF 5% 63VDC 064300
C12 CAP MPF 0.01UF 5% 63VDC 064312
C13 CAP MPF 0.01UF 5% 63VDC 064312
C14 CAP MPF 0.01UF 5% 63VDC 064312
C15 CAP MONO .1uF 50V 20% Z5U 061305
C16 CAP MPF 0.01UF 5% 63VDC 064312
C17 CAP MONO .1uF 50V 20% Z5U 061305
C18 CAP ELECT 10UF 100VDC 066411
C19 CAP MONO .1uF 50V 20% Z5U 061305
C20 CAP MONO .1uF 50V 20% Z5U 061305
C21 CAP MONO .1uF 50V 20% Z5U 061305
C22 CAP ELECT 10UF 100VDC 066411
C23 CAP MONO .1uF 50V 20% Z5U 061305
C24 CAP MONO .01UF 50V 20% X7R 061304
C25 CAP MONO .01UF 50V 20% X7R 061304
C27 CAP MONO .01UF 50V 20% X7R 061304
C28 CAP MONO .01UF 50V 20% X7R 061304
C29 CAP MONO .01UF 50V 20% X7R 061304
C30 CAP ELECT 47UF 25V 066413
C31 CAP MONO .1uF 50V 20% Z5U 061305
C32 CAP MONO .01UF 50V 20% X7R 061304
C33 CAP MONO .1uF 50V 20% Z5U 061305
C34 CAP ELECT 100UF 25V 066412
C35 CAP MONO .1uF 50V 20% Z5U 061305
C36 CAP MONO .1uF 50V 20% Z5U 061305
C37 CAP ELECT 100UF 25V 066412
C38 CAP MONO .1uF 50V 20% Z5U 061305
C39 CAP ELECT 1000UF 25V 066513
C40 CAP MPF 0.033UF 100V 10% 064427
C41 CAP MPF 0.033UF 100V 10% 064427
C42 CAP ELECT 220UF 50V 20% 066254
C43 CAP MONO 100PF 100V 10% NPO 061300
C44 CAP ELECT 47UF 25V 066413
C45 CAP MONO .1uF 50V 20% Z5U 061305
C46 CAP MONO .1uF 50V 20% Z5U 061305
C47 CAP ELECT 3300UF 35V 066509
C48 CAP ELECT 3300UF 35V 066509
C49 CAP ELECT 3300UF 35V 066509
C50 CAP ELECT 3300UF 35V 066509
C51 CAP MONO .01UF 50V 20% X7R 061304
C52 CAP MONO .1uF 50V 20% Z5U 061305
C53 CAP MONO .1uF 50V 20% Z5U 061305
C54 CAP MONO .1uF 50V 20% Z5U 061305
C55 CAP MONO .1uF 50V 20% Z5U 061305
C56 CAP MONO .1uF 50V 20% Z5U 061305
C57 CAP ELECT 220UF 50V 20% 066254
C58 CAP ELECT 47UF 50V 066215
C59 CAP ELECT 220UF 25V AUDIO 066414
C60 CAP ELECT 220UF 25V AUDIO 066414
C61 CAP ELECT 220UF 25V AUDIO 066414
C62 CAP ELECT 220UF 25V AUDIO 066414
C63 CAP ELECT 220UF 25V AUDIO 066414
C64 CAP ELECT 47UF 50V 066215
C65 CAP ELECT 220UF 25V AUDIO 066414
C66 CAP ELECT 10UF 16V 4X5 CASE 066382
C67 CAP ELECT 10UF 16V 4X5 CASE 066382
C68 CAP ELECT 10UF 16V 4X5 CASE 066382
C69 CAP ELECT 10UF 16V 4X5 CASE 066382
C70 CAP ELECT 10UF 16V 4X5 CASE 066382
C71 CAP ELECT 10UF 16V 4X5 CASE 066382
C72 CAP ELECT 10UF 16V 4X5 CASE 066382
C73 CAP ELECT 10UF 16V 4X5 CASE 066382
C74 CAP ELECT 47UF 16V 6.3X5 CASE 066380
C75 CAP ELECT 47UF 16V 6.3X5 CASE 066380
C76 CAP ELECT 100UF 16V 5MM 066539
C77 CAP ELECT 47UF 16V 6.3X5 CASE 066380
C78 CAP ELECT 47UF 16V 6.3X5 CASE 066380
C79 CAP ELECT 100UF 16V 5MM 066539
C80 CAP ELECT 47UF 16V 6.3X5 CASE 066380
C81 CAP ELECT 47UF 16V 6.3X5 CASE 066380
C82 CAP ELECT 100UF 16V 5MM 066539
C83 CAP ELECT 47UF 16V 6.3X5 CASE 066380
C84 CAP ELECT 47UF 16V 6.3X5 CASE 066380
C85 CAP ELECT 100UF 16V 5MM 066539
C86 CAP ELECT 10UF 16V 4X5 CASE 066382
C87 CAP ELECT 10UF 16V 4X5 CASE 066382
C88 CAP ELECT 10UF 16V 4X5 CASE 066382
C89 CAP ELECT 10UF 16V 4X5 CASE 066382
C90 CAP ELECT 10UF 16V 4X5 CASE 066382
C91 CAP ELECT 10UF 16V 4X5 CASE 066382
C92 CAP ELECT 10UF 16V 4X5 CASE 066382
C93 CAP ELECT 10UF 16V 4X5 CASE 066382
C94 CAP ELECT 10UF 16V 4X5 CASE 066382
C95 CAP ELECT 10UF 16V 4X5 CASE 066382
C96 CAP ELECT 10UF 16V 4X5 CASE 066382
C97 CAP ELECT 10UF 16V 4X5 CASE 066382
C98 CAP ELECT 10UF 16V 4X5 CASE 066382
C99 CAP ELECT 10UF 16V 4X5 CASE 066382
C100 CAP ELECT 10UF 16V 4X5 CASE 066382
C101 CAP ELECT 10UF 16V 4X5 CASE 066382
C102 CAP ELECT 47UF 16V 6.3X5 CASE 066380
C103 CAP ELECT 47UF 16V 6.3X5 CASE 066380
C104 CAP ELECT 100UF 16V 5MM 066539
C105 CAP ELECT 47UF 16V 6.3X5 CASE 066380
C106 CAP ELECT 47UF 16V 6.3X5 CASE 066380
C107 CAP ELECT 100UF 16V 5MM 066539
C108 CAP ELECT 47UF 16V 6.3X5 CASE 066380
C109 CAP ELECT 47UF 16V 6.3X5 CASE 066380
C110 CAP ELECT 100UF 16V 5MM 066539
C111 CAP ELECT 47UF 16V 6.3X5 CASE 066380
C112 CAP ELECT 47UF 16V 6.3X5 CASE 066380
C113 CAP ELECT 100UF 16V 5MM 066539
C114 CAP ELECT 10UF 16V 4X5 CASE 066382
C115 CAP ELECT 10UF 16V 4X5 CASE 066382
C116 CAP ELECT 10UF 16V 4X5 CASE 066382
C117 CAP ELECT 10UF 16V 4X5 CASE 066382
C118 CAP ELECT 10UF 16V 4X5 CASE 066382
C119 CAP ELECT 10UF 16V 4X5 CASE 066382
C120 CAP ELECT 10UF 16V 4X5 CASE 066382
C121 CAP ELECT 10UF 16V 4X5 CASE 066382
C122 CAP MONO 100PF 100V 10% NPO 061300
C123 CAP MONO 100PF 100V 10% NPO 061300
C124 CAP MONO 100PF 100V 10% NPO 061300
C125 CAP MONO 100PF 100V 10% NPO 061300
C126 CAP MONO 100PF 100V 10% NPO 061300
C127 CAP MONO 100PF 100V 10% NPO 061300
C128 CAP ELECT 47UF 25V 066413
C129 CAP ELECT 47UF 25V 066413
C130 CAP ELECT 47UF 25V 066413
C131 CAP ELECT 47UF 25V 066413
C132 CAP MONO .1uF 50V 20% Z5U 061305
C133 CAP MONO .1uF 50V 20% Z5U 061305
C134 CAP ELECT 10UF 100VDC 066411
C135 CAP ELECT 10UF 100VDC 066411
C136 CAP ELECT 10UF 100VDC 066411
C137 CAP ELECT 10UF 100VDC 066411
C138 CAP ELECT 10UF 100VDC 066411
C139 CAP ELECT 10UF 100VDC 066411
C140 CAP MONO .1uF 50V 20% Z5U 061305
C141 CAP MONO .1uF 50V 20% Z5U 061305
C142 CAP MONO .1uF 50V 20% Z5U 061305
C143 CAP MONO .1uF 50V 20% Z5U 061305
C144 CAP POLYPROP 4700PF 2.5% 63VDC 064390
C145 CAP POLYPROP 4700PF 2.5% 63VDC 064390
C146 CAP POLYPROP 4700PF 2.5% 63VDC 064390
C147 CAP POLYPROP 4700PF 2.5% 63VDC 064390
C148 CAP POLYPROP 470PF 5% 100VDC 064370
C149 CAP POLYPROP 470PF 5% 100VDC 064370
C150 CAP POLYPROP 470PF 5% 100VDC 064370
C151 CAP POLYPROP 470PF 5% 100VDC 064370
C152 CAP POLYPROP .0015UF 5% 100VDC 064369
C153 CAP POLYPROP .0015UF 5% 100VDC 064369
C154 CAP POLYPROP .0015UF 5% 100VDC 064369
C155 CAP POLYPROP .0015UF 5% 100VDC 064369
C156 CAP MONO .1uF 50V 20% Z5U 061305
C157 CAP ELECT 10UF 100VDC 066411
C158 CAP ELECT 10UF 100VDC 066411
C159 CAP MONO .1uF 50V 20% Z5U 061305
C160 CAP MPF 0.1UF 5% 63VDC 064325
C161 CAP MPF 0.1UF 5% 63VDC 064325
C162 CAP POLYPROP 680PF 2.5% 100VDC 064389
C163 CAP POLYPROP 680PF 2.5% 100VDC 064389
C164 CAP POLYPROP 680PF 2.5% 100VDC 064389
C165 CAP POLYPROP 680PF 2.5% 100VDC 064389
C166 CAP MPF 0.1UF 5% 63VDC 064325
C167 CAP MPF 0.1UF 5% 63VDC 064325
C168 CAP MPF 0.1UF 5% 63VDC 064325
C169 CAP MPF 0.1UF 5% 63VDC 064325
C170 CAP ELECT 47UF 25V 066413
C171 CAP ELECT 47UF 25V 066413
C172 CAP ELECT 47UF 25V 066413
C173 CAP ELECT 47UF 25V 066413
C174 CAP ELECT 47UF 25V 066413
C175 CAP ELECT 47UF 25V 066413
D1 DIODE RECTIFIER 070131
D2 DIODE RECTIFIER 070131
D3 DIODE SILICON 070047
D4 DIODE RECTIFIER 070131
D5 DIODE RECTIFIER 070131
D6 DIODE RECTIFIER 070131
D7 DIODE RECTIFIER 070131
D8 DIODE RECTIFIER 070131
D9 DIODE RECTIFIER 070131
D10 DIODE RECTIFIER 070131
D11 DIODE RECTIFIER 070131
D12 DIODE RECTIFIER 070131

2827
PARTS LIST con’t
D13 DIODE SILICON 070047
D14 DIODE SILICON 070047
D15 DIODE RECTIFIER 070131
D16 DIODE ZENER 6.2V 5% 500MW 070085
D17 DIODE SILICON 070047
D18 DIODE SILICON 070047
D19 DIODE SILICON 070047
D20 DIODE ZENER 30V 1/2W 5% 070161
D21 DIODE SILICON 070047
D22 DIODE FAST RECOVER 070156
D23 DIODE FAST RECOVER 070156
D24 DIODE FAST RECOVER 070156
D25 DIODE FAST RECOVER 070156
D26 DIODE FAST RECOVER 070156
D27 DIODE FAST RECOVER 070156
D28 DIODE FAST RECOVER 070156
D29 DIODE FAST RECOVER 070156
D30 DIODE FAST RECOVER 070156
D31 DIODE FAST RECOVER 070156
D32 DIODE FAST RECOVER 070156
D33 DIODE FAST RECOVER 070156
D34 DIODE FAST RECOVER 070156
D35 DIODE FAST RECOVER 070156
D36 DIODE FAST RECOVER 070156
D37 DIODE FAST RECOVER 070156
D38 DIODE FAST RECOVER 070156
D39 DIODE FAST RECOVER 070156
D40 DIODE SILICON 070047
D41 DIODE SILICON 070047
F1 0.5A 5x20 fuse IEC 089092
FN1 FILTER EMI 180057
FN2 FILTER EMI 180057
FN3 FILTER EMI 180057
FN4 FILTER EMI 180057
FN5 FILTER EMI 180057
HS2 HEATSINK TO-220 080017
HS3 HEATSINK TO-220 080017
HS4 HEATSINK TO-220 080017
HS5 HEATSINK TO-220 080017
J1 XLR FEMALE HORIZ PCB WITH LATCH 117814
J2 JACK RCAORANGE WITH GOLD 117798
J3 JACK RCAORANGE WITH GOLD 117798
J4 JACK RCAORANGE WITH GOLD 117798
J5 6 PIN HEADER 117828
J6 CONN 23 PIN FFC 117715
J7 BLADE FASTON W/FEET 117708
J8 BLADE FASTON W/FEET 117708
J9 CONN PCB MOUNT POWER RED 117719
J10 CONN PCB MOUNT POWER RED 117719
J11 CONN PCB MOUNT POWER RED 117719
J12 CONN PCB MOUNT POWER RED 117719
J13 CONN 12 PIN FFC 117720
J14 HEADER 8 PIN MTA-156 117717
J15 JACK HEADPHONE STEREO 1/8IN 117759
J16 JACK HEADPHONE STEREO 1/8IN 117759
J17 JACK HEADPHONE STEREO 1/8IN 117759
J18 JACK HEADPHONE STEREO 1/8IN 117759
J19 10 PIN HEADER 117829
J20 RECEPTACLE XLR MALE 117686
J21 JACK PHONO DUAL WHT/RED 117692
J22 RECEPTACLE XLR MALE 117686
K1 RELAY REED FORM 1C 5V 125 OHM 087056
K2 RELAY REED FORM 1C 5V 125 OHM 087056
K3 RELAY REED FORM 1C 5V 125 OHM 087056
K4 RELAY REED FORM 1C 5V 125 OHM 087056
K5 RELAY REED FORM 1A 5V 500 OHMS 087050
K6 RELAY REED FORM 1A 5V 500 OHMS 087050
K7 RELAY REED FORM 1A 5V 500 OHMS 087050
K8 RELAY REED FORM 1A 5V 500 OHMS 087050
K9 RELAY REED FORM 1A 5V 500 OHMS 087050
K10 RELAY REED FORM 1A 5V 500 OHMS 087050
K11 RELAY REED FORM 1A 5V 500 OHMS 087050
L1 CHOKE 18uH 5%-10% 122224
L2 CHOKE 18uH 5%-10% 122224
L3 CHOKE 18uH 5%-10% 122224
L4 BEADS FERRITE LEADED 076019
L5 BEADS FERRITE LEADED 076019
L6 BEADS FERRITE LEADED 076019
L7 CHOKE 100UH 122312
L8 CHOKE 18uH 5%-10% 122224
L9 CHOKE 18uH 5%-10% 122224
L10 CHOKE 18uH 5%-10% 122224
L11 CHOKE 18uH 5%-10% 122224
L12 BEADS FERRITE LEADED 076019
OPT1 Fiber Optic Receiver 058156
OPT2 Fiber Optic Receiver 058156
OPT3 Fiber Optic Receiver 058156
Q1 TRANSISTOR PNP SILICON 132172
Q2 TRANSISTOR PNP 132224
Q3 TRANSISTOR NPN SILICON 132171
Q4 COUPLER OPTICAL SCHMITT OUTPUT 131023
Q5 TRANSISTOR PNP SILICON 132172
Q6 TRANSISTOR NPN 132268
Q7 TRANSISTOR PNP 132267
Q8 TRANSISTOR NPN 132268
Q9 TRANSISTOR PNP 132267
Q10 TRANSISTOR NPN 132268
Q11 TRANSISTOR PNP 132267
Q12 TRANSISTOR NPN 132268
Q13 TRANSISTOR PNP 132267
Q14 TRANSISTOR NPN 132268
Q15 TRANSISTOR PNP 132267
Q16 TRANSISTOR NPN 132268
Q17 TRANSISTOR PNP 132267
R1 RES MF 75 OHM 1% 1/4W 144444
R2 RES MF 110 OHM 1% 1/4W 144489
R3 RES MF 75 OHM 1% 1/4W 144444
R4 RES MF 47.5K 1% 1/4W 144108
R5 RES MF 47.5K 1% 1/4W 144108
R6 RES MF 75 OHM 1% 1/4W 144444
R7 RES MF 2.87K 1% 1/4W 144142
R8 RES MF 47.5K 1% 1/4W 144108
R9 RES MF 221 OHM 1% 1/4W 144172
R10 RES MF 47.5K 1% 1/4W 144108
R11 RES MF 221 OHM 1% 1/4W 144172
R12 RES MF 221 OHM 1% 1/4W 144172
R13 RES MF 221 OHM 1% 1/4W 144172
R14 RES MF 221 OHM 1% 1/4W 144172
R15 RES NETWORK 9X-1-223 144238
R16 RES MF 221 OHM 1% 1/4W 144172
R17 RES MF 221 OHM 1% 1/4W 144172
R18 RES MF 221 OHM 1% 1/4W 144172
R19 RES MF 221 OHM 1% 1/4W 144172
R20 RES MF 221 OHM 1% 1/4W 144172
R21 RES MF 332 OHM 1% 1/4W 144446
R22 RES MF 221 OHM 1% 1/4W 144172
R23 RES MF 221 OHM 1% 1/4W 144172
R24 RES MF 221 OHM 1% 1/4W 144172
R25 RES MF 2.21 OHM 1/4W 1% 144378
R26 RES MF 221 OHM 1% 1/4W 144172
R27 RES MF 22.1K 1% 1/4W 144187
R28 RES MF 1.5K 1% 1/4W 144128
R29 RES MF 10 OHM 1% 1/4W 144157
R30 RES MF 22.1K 1% 1/4W 144187
R31 RES MF 4.75K 1% 1/4W 144097
R32 RES MF 221 OHM 1% 1/4W 144172
R33 RES MF 221 OHM 1% 1/4W 144172
R34 RES MF 221 OHM 1% 1/4W 144172
R35 RES MF 100K 1% 1/4W 144113
R36 RES MF 47.5K 1% 1/4W 144108
R37 RES MF 475 OHM 1% 1/4W 144086
R38 RES MF 221 OHM 1% 1/4W 144172
R39 RES MF 475 OHM 1% 1/4W 144086
R40 PTC RESETTABLE FUSE 144488
R41 PTC RESETTABLE FUSE 144488
R42 RES FP 10 OHM 5% 1/4W 137025
R43 RES MF 47.5K 1% 1/4W 144108
R44 RES CF 10 OHM 5% 1/2W 141165
R45 RES MF 806 OHM 1% 1/4W 144089
R46 RES MF 475K 1% 1/4W 144364
R47 RES MF 47.5K 1% 1/4W 144108
R48 RES MF 10K 1% 1/4W 144053
R49 RES MF 562 OHM 1% 1/4W 144408
R50 RES MF 1K 1% 1/4W 144090
R51 RES MF 10K 1% 1/4W 144053
R52 RES MF 22.1K 1% 1/4W 144187
R53 RES MF 22.1K 1% 1/4W 144187
R54 RES MF 47.5 OHM 1% 1/4W 144442
R55 RES MF 1.5K 1% 1/4W 144128
R56 RES MF 47.5 OHM 1% 1/4W 144442
R57 RES MF 47.5 OHM 1% 1/4W 144442
R58 RES MF 10K 1% 1/4W 144053
R59 RES MF 22.1 OHM 1% 1/4W 144160
R60 RES MF 22.1 OHM 1% 1/4W 144160
R61 RES MF 22.1 OHM 1% 1/4W 144160
R62 RES MF 47.5 OHM 1% 1/4W 144442
R63 RES MF 100K 1% 1/4W 144113
R64 RES MF 100K 1% 1/4W 144113
R65 RES MF 100K 1% 1/4W 144113
R66 RES MF 100K 1% 1/4W 144113
R67 RES MF 1.21K 1% 1/4W 144191
R68 RES MF 1.21K 1% 1/4W 144191
R69 RES MF 1.21K 1% 1/4W 144191
R70 RES MF 1.21K 1% 1/4W 144191
R71 RES MF 100K 1% 1/4W 144113
R72 RES MF 100K 1% 1/4W 144113
R73 RES MF 100K 1% 1/4W 144113
R74 RES MF 100K 1% 1/4W 144113
R75 RES MF 1.5K 1% 1/4W 144128
R76 RES MF 1.5K 1% 1/4W 144128
R77 RES MF 1.5K 1% 1/4W 144128
R78 RES MF 1.5K 1% 1/4W 144128
R79 RES MF 2K 1% 1/4W 144094
R80 RES MF 2K 1% 1/4W 144094
R81 RES MF 2K 1% 1/4W 144094
R82 RES MF 2K 1% 1/4W 144094
R83 RES MF 1.5K 1% 1/4W 144128
R84 RES MF 1.5K 1% 1/4W 144128

3029
PARTS LIST con’t
MDA1000
R85 RES MF 1.5K 1% 1/4W 144128
R86 RES MF 1.5K 1% 1/4W 144128
R87 RES MF 3.74K 1% 1/4W 144384
R88 RES MF 3.74K 1% 1/4W 144384
R89 RES MF 3.4K 1% 1/4W 144383
R90 RES MF 3.4K 1% 1/4W 144383
R91 RES MF 3.74K 1% 1/4W 144384
R92 RES MF 3.74K 1% 1/4W 144384
R93 RES MF 3.4K 1% 1/4W 144383
R94 RES MF 3.4K 1% 1/4W 144383
R95 RES MF 1.69K 1% 1/4W 144382
R96 RES MF 1.69K 1% 1/4W 144382
R97 RES MF 1.69K 1% 1/4W 144382
R98 RES MF 1.69K 1% 1/4W 144382
R99 RES MF 4.75K 1% 1/4W 144097
R100 RES MF 10 OHM 1% 1/4W 144157
R101 RES MF 4.75K 1% 1/4W 144097
R102 RES MF 4.75K 1% 1/4W 144097
R103 RES MF 4.75K 1% 1/4W 144097
R104 RES MF 10 OHM 1% 1/4W 144157
R105 RES MF 10 OHM 1% 1/4W 144157
R106 RES MF 10 OHM 1% 1/4W 144157
R107 RES MF 10 OHM 1% 1/4W 144157
R108 RES MF 10 OHM 1% 1/4W 144157
R109 RES MF 4.75K 1% 1/4W 144097
R110 RES MF 4.75K 1% 1/4W 144097
R111 RES MF 4.75K 1% 1/4W 144097
R112 RES MF 4.75K 1% 1/4W 144097
R113 RES MF 4.75K 1% 1/4W 144097
R114 RES MF 4.75K 1% 1/4W 144097
R115 RES MF 4.75K 1% 1/4W 144097
R116 RES MF 4.75K 1% 1/4W 144097
R117 RES MF 10 OHM 1% 1/4W 144157
R118 RES MF 10 OHM 1% 1/4W 144157
R119 RES MF 10 OHM 1% 1/4W 144157
R120 RES MF 10 OHM 1% 1/4W 144157
R121 RES MF 10 OHM 1% 1/4W 144157
R122 RES MF 10 OHM 1% 1/4W 144157
R123 RES MF 10 OHM 1% 1/4W 144157
R124 RES MF 10 OHM 1% 1/4W 144157
R125 RES MF 47.5K 1% 1/4W 144108
R126 RES MF 47.5K 1% 1/4W 144108
R127 RES MF 47.5K 1% 1/4W 144108
R128 RES MF 47.5K 1% 1/4W 144108
R129 RES MF 47.5K 1% 1/4W 144108
R130 RES MF 47.5K 1% 1/4W 144108
R131 RES MF 22.1 OHM 1% 1/4W 144160
R132 RES MF 22.1 OHM 1% 1/4W 144160
R133 RES MF 22.1 OHM 1% 1/4W 144160
R134 RES MF 22.1 OHM 1% 1/4W 144160
R135 RES MF 22.1 OHM 1% 1/4W 144160
R136 RES MF 22.1 OHM 1% 1/4W 144160
R137 RES MF 47.5K 1% 1/4W 144108
R138 RES MF 47.5K 1% 1/4W 144108
R139 RES MF 47.5K 1% 1/4W 144108
R140 RES MF 47.5K 1% 1/4W 144108
R141 RES MF 47.5K 1% 1/4W 144108
R142 RES MF 47.5K 1% 1/4W 144108
R143 RES MF 4.02K 1% 1/4W 144096
R144 RES MF 1K 1% 1/4W 144090
R145 RES MF 1K 1% 1/4W 144090
R146 RES MF 1K 1% 1/4W 144090
R147 RES MF 1K 1% 1/4W 144090
R148 RES MF 1K 1% 1/4W 144090
R149 RES MF 1K 1% 1/4W 144090
R150 RES MF 1K 1% 1/4W 144090
R151 RES MF 1K 1% 1/4W 144090
R152 RES MF 47.5 OHM 1% 1/4W 144442
R153 RES MF 475 OHM 1% 1/4W 144086
RL1 RELAY 5V DPST 087074
RL2 RELAY 5V DPST 087074
T1 TRANSFORMER DIGITAL INTERFACE 159285
U1 DIFFERENTIAL RECEIVER 133485
U2 DIGITALINTERFACE RECEIVER 133483
U3 SINGLE 2-INPUTNOR GATE 133500
U4 DUAL D-FLIP-FLOP 133499
U5 SINGLE 2-INPUTAND GATE 133502
U6 PROGRAMMED VERSION OF 133495 133496
U7 SINGLE 2-INPUTNAND GATE 133501
U8 OCTALBUFFER WITH 3 STATE 133503
U9 SINGLE 2-INPUTAND GATE 133502
U10 REGULATOR 3.3V LOW DROP 133464
U11 IC REGULATOR 5V 1.5A LOW DROP 133365
U12 ICAND 2 INPUT X 4 133175
U13 IC MONOSTB MULTIVIB X 2 133182
U14 IC REGULATOR 3.3V LOW DROPOUT 133393
U15 IC REGULATOR 5V 1.5A LOW DROP 133365
U16 -5V LOW DROPOUT REGULATOR 133493
U17 IC REGULATOR 12V 133156
U18 IC REGULATOR -12V 133155
U19 IC D/ACONVERTER 24 BIT 133392
U20 IC D/ACONVERTER 24 BIT 133392
U21 IC D/ACONVERTER 24 BIT 133392
U22 IC D/ACONVERTER 24 BIT 133392
U23 IC D/ACONVERTER 24 BIT 133392
U24 IC D/ACONVERTER 24 BIT 133392
U25 IC D/ACONVERTER 24 BIT 133392
U26 IC D/ACONVERTER 24 BIT 133392
U27 IC OP AMP DUAL FET INPUT 133432
U28 IC OP AMP DUAL FET INPUT 133432
U29 STEREO VOLUME CONTROL 133505
U30 STEREO VOLUME CONTROL 133505
U31 IC DUAL OPERATIONALAMPLIFIER 133260
U32 IC DUAL OPERATIONALAMPLIFIER 133260
U33 IC DUAL OPERATIONALAMPLIFIER 133260
U34 IC DUAL OPERATIONALAMPLIFIER 133260
U35 IC DUAL OPERATIONALAMPLIFIER 133260
Y1 RESONATOR CERAMIC 6.0MHZ W/CAP 180039
UPSAMPLING MODULE 049999
KEYBOARD PCB 049990
C1 CAP ELECT 10UF 16V 4X5 CASE 066382
C2 CAP ELECT 47UF 16V 6.3X5 CASE 066380
C3 CAP MONO .1uF 50V 20% Z5U 061305
DS1 LED SQUARE RED 058109
DS2 LED GREEN 5MM HI-INT VF[V] 3.5 058165
DS3 LED SQUARE RED 058109
J1 CONN 12 PIN FFC 117720
MT1 SENSOR IR 38KHZ 121046
Q1 TRANSISTOR NPN 132223
R1 RES MF 10 OHM 1% 1/4W 144157
R2 RES MF 75 OHM 1% 1/4W 144444
S1 SWITCH PB TACT 150058
S2 SWITCH PB TACT 150058
DISPLAY PCB 049989
C1 CAP ELECT 10UF 16V 4X5 CASE 066382
C2 CAP MONO .1uF 50V 20% Z5U 061305
C3 CAP ELECT 10UF 50V LOW ESR 066437
C4 CAP MONO 22PF 200V 10% NPO 061298
C5 CAP MONO .1uF 50V 20% Z5U 061305
C6 CAP ELECT 47UF 16V 6.3X5 CASE 066380
DS1 LED GREEN 5MM HI-INT VF[V] 3.5 058165
DS2 LED GREEN 5MM HI-INT VF[V] 3.5 058165
DS3 LED GREEN 5MM HI-INT VF[V] 3.5 058165
DS4 16 Digits VF display 058169
J1 CONN 23 PIN FFC 117715
J2 CONN 12 PIN FFC 117720
L1 CHOKE 18uH 5%-10% 122224
L2 BEADS FERRITE LEADED 076019
L3 BEADS FERRITE LEADED 076019
R1 RES MF 332 OHM 1% 1/4W 144446
R2 RES MF 100 OHM 1% 1/4W 144196
R3 RES MF 100 OHM 1% 1/4W 144196
R4 RES MF 100 OHM 1% 1/4W 144196
R5 RES MF 100 OHM 1% 1/4W 144196
R6 RES MF 47.5K 1% 1/4W 144108
R7 RES NETWORK 3X22K BUSSED 144252
R8 RES MF 5.62K OHM 1% 1/4W 144447
S1 16 ENCODER 129294
S2 ENCODER OPTICAL ROTARY 146246
U1 VFD DRIVER 133442
DATAPORT PCB 049991
C1 CAP MONO .1uF 50V 20% Z5U 061305
C2 CAP ELECT 10UF 50V 066445
J1 CONN 12 PIN FFC 117720
J2 JACK HEADPHONE STEREO 1/8IN 117759
J3 JACK HEADPHONE STEREO 1/8IN 117759
J4 JACK HEADPHONE STEREO 1/8IN 117759
J5 JACK HEADPHONE STEREO 1/8IN 117759
J6 JACK HEADPHONE STEREO 1/8IN 117759
J7 JACK HEADPHONE STEREO 1/8IN 117759
J8 JACK HEADPHONE STEREO 1/8IN 117759
L1 BEADS FERRITE LEADED 076019
R1 RES MF 100K 1% 1/4W 144113
R2 RES NETWORK 3X22K BUSSED 144252
R3 RES MF 100 OHM 1% 1/4W 144196
R4 RES MF 100 OHM 1% 1/4W 144196
R5 RES MF 100 OHM 1% 1/4W 144196
R6 RES MF 100 OHM 1% 1/4W 144196
R7 RES MF 100 OHM 1% 1/4W 144196
R8 RES MF 100 OHM 1% 1/4W 144196
R9 RES MF 100 OHM 1% 1/4W 144196
R11 RES MF 47.5 OHM 1% 1/4W 144442
SP1 BRACKET PCB CARD MOUNTING 003611
SP2 BRACKET PCB CARD MOUNTING 003611
U1 IC SHFT REG SER-PAR 133186
U2 LB1720 DRIVER ARRAY 133180
3
4
5
6

3231
EXPLODEDVIEW and PARTS LIST
Part
No. Description
Ref
No.
1 016499 CENTER GLASS PANEL
2 016500 RIGHT GLASS PANEL
3 016498 LEFT GLASS PANEL
4 017517 PUSHBUTTON ASSY BLK
5 017531 PUSHBUTTON ASSY RED
6 078033 O-RING
7 148073 SWITCH DPDT ROCKER
8 094016 TAPE VINYL FOAM 1/16 X 1/4
9 018722 EXTRUSION CENTER 5”
10 018721 END CAP 5”
11 018715 TOP/BOTTOM END CAP
12 100342 SCREW 6-32 X 3/8 FILLISTER HD
13 092440 DISPLAY FILTER
14 005358 PLATE BACK
15 005360 GAP PLATE
16 100276 SCREW MACH SEMS 6-32 X 5/16 PH PN
17 101074 SCREW TAPPING 4-40 X 1/4 PH PN
18 049990 ASSY KEYBOARD PCB
19 017933 CIRCUIT BOARD SUPPORT
20 017907 TITLE/PUSHBUTTON BACKLIGHT
21 017901 LOGO/PUSHBUTTON BACKLIGHT
22 017934 CIRCUIT BOARD SUPPORT
23 049989 ASSY DISPLAY PCB
24 101222 SCREW TT SEMS 6-32 X 1/4 PH PN
25 005359 SUBPANEL
26 159343 TRANSFORMER R-CORE POWER
27 117800 MTACONN 8 PIN .156
28 102003 NUT MACH 6-32 W/LOCK
29 018723 TOP PANEL
30 005364 TOP STRIP
31 094192 TAPE DOUBLE SIDED 1/2”
32 005396 GOLD STRIP
33 016501 GLASS TOP COVER
34 094442 FOAM PAD
35 005365 TRAY
36 102064 NUT CAP 6-32
37 049619 ASSY KNOB 40 METRIC W/O INDEX
38 050000 ASSY KNOB 40 AMER W/O INDEX
39 104017 BLK FELT WASHER 3/4 X 1/4 X 1/16
40 101232 SCREW 6-32 X 1/4 PHIL FLAT
41 101196 SCREW TAPSEMS 6-32 X 1/4 PH PN
42 049988 ASSY MAIN PCB
43 049999 ASSY UPSAMPLING PCB
44 126960 DECAL UPSAMPLING
45 126961 DECAL D/A CONVERTER LEFT
46 126962 DECAL D/A CONVERTER RIGHT
47 005366 PCB BRACE
48 049991 ASSY DATAPORT PCB
49 117755 RECEPTACLE INPUT& LINE FILTER
50 102001 NUT KEP 4-40 CADMIUM PLATE
51 102002 NUT MACH 6-32 SELF-LOCK
52 005357 REAR PANEL
53 101197 SCREW HI-LO 6-32 X 1/4 PH PN
54 100356 SCREW 10-32 X 1/2 LOW SHCS
55 005361 SIDE PANEL
56 018724 SIDE PANEL
57 101109 SCREW 6-32 X 5/16 PH PN BLK
58 005363 BOTTOM COVER
59 017937 FOOT
60 104083 WASHER #10 PLATED 104062
61 100159 SCREW MACH 10-32 X 3/4 PH PN BLK

33
MDA1000
REPACKING INSTRUCTIONS

SERVICE MANUAL
The continuous improvement of its products is the policy of McIntosh Laboratory Incorporated, who reserve the right to improve design without
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 040899
D/A CONVERTER