D/A CONVERTER SERVICE MANUAL CONTENTS
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- Moris James Jacobs
- 6 years ago
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1 D/A CONVERTER CONTENTS Performance Specifications... 2 Notes... 2 Rear Panel... 3 Section Location... 4 Block Diagram Interconnection Diagram Main Schematic and PCB Keyboard Supply Schematic and PCB Display Schematic and PCB Dataport Schematic and PCB Parts List Exploded View and Parts List Repacking Instructions SERVICE MANUAL
2 PERFORMANCE SPECIFICATIONS Analog Audio Specifications Frequency Response +/-0.dB from 4Hz to 4,000Hz (Sampling Frequency 96kHz and 88.2kHz) +/-0.3dB from 4Hz to 22,000Hz (Sampling Frequency 48kHz) +/-0.3dB from 4Hz to 20,000Hz (Sampling Frequency 44.kHz) +/-0.3dB from 4Hz to,000hz (Sampling Frequency 32kHz) Total Harmonic Distortion 0.002% at,000hz Signal To Noise Ratio Better than 0dB (A Weighted) Dynamic Range Better than 00dB (,000Hz) Rated Output Voltage 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 Digital Audio Format IEC98, S/PDIF Coaxial Inputs (, 2 and 3) 0.V 7ohms Optical Inputs (4, and 6) - ~ -20dBm XRL Input (7) V 0ohms Sampling Frequencies 96kHz, 48kHz, 44.kHz and 32kHz General Specifications Power Requirements 00 Volts 0.60Hz, 20 watts 0 Volts 0/60Hz, 20 watts 20 Volts 0/60Hz, 20 watts 220 Volts 0/60Hz, 20 watts 230 Volts 0/60Hz, 20 watts 240 Volts 0/60Hz, 20 watts Note: Refer to the rear panel of the MDA000 for the correct voltage. Overall Dimensions Width is 7-/2 inches (44.4cm), Height is 6 inches (.24cm) including feet, Depth is 6-/8 inches (40.96cm) including Front Panel and Knobs Weight 24 pounds (0.89kg) net, 38 pounds (7.24kg) in shipping carton NOTES. 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. AC input at 20 volts, 0/60Hz. b. All voltages are +/-0% with respect to ground. A high impedance (0 megaohm) voltmeter must be used. 3. Unless otherwise specified: a. Resistor values are in ohms. b. Capacitor values are microfarads (uf). c. Inductor values are in microhenries (uh). 4. On PC board drawings, Square pad indicates: a. Polarized Capacitors - Positive b. Diodes - Cathode c. Others - Pin. WARNING Parts marked with the symbol have critical characteristics. Use only replacement parts recommended by the manufacturer. 2
3 TOP AND REAR PANEL MDA000 3
4 SECTION LOCATIONS 6 DATAPORT PCB MAIN PCB 2 3 UPSAMPLING PCB TRANSFORMER DISPLAY PCB 4 KEYBOARD PCB TOP VIEW WITH COVER REMOVED 4
5 BLOCK DIAGRAM MDA000 DIGITAL INPUT DATA PORT COAXIAL COAXIAL COAXIAL OPTICAL OPTICAL OPTICAL XLR DIFFERENTIAL AMP DATA PORT DRIVER DIGITAL INTERFACE RECEIVER S/F DIVIDER BCK DATA LRCK MCK 768KHz UPSAMPLING MODULE BCK LRCK LDATA RDATA LEFT + 24BIT D/A CONVERTER LEFT + 24BIT D/A CONVERTER LEFT - 24BIT D/A CONVERTER LEFT - 24BIT D/A CONVERTER LEFT + I/V CONV. LEFT - I/V CONV. LEFT BALANCED OUTPUT LEVEL CONTROL BYPASS CONTROL BYPASS CONTROL LEFT + FILTER LEFT - FILTER LEFT DIFFERENTIAL AMP LEFT + BALANCED AMP LEFT - BALANCED AMP MUTE MUTE MUTE + - LEFT UNBALANCED LEFT BALANCED OUTPUTS 6 7 RESET MUTE RIGHT UNBALANCED IR SENSOR MICROCONTROLLER RIGHT + 24BIT D/A CONVERTER IR INPUT DATA INPUT IN POWER CONTROL OUT POWER CONTROL INPUT LEVEL SELECT SETUP CONTROLS DISPLAY DRIVER V. F. DISPLAY DISPLAY ANALOG VOLTAGE SUPPLY V V -V -V RIGHT + 24BIT D/A CONVERTER RIGHT - 24BIT D/A CONVERTER RIGHT - 24BIT D/A CONVERTER RIGHT + I/V CONV. RIGHT - I/V CONV. RIGHT BALANCED OUTPUT LEVEL CONTROL BYPASS CONTROL BYPASS CONTROL RIGHT + FILTER RIGHT - FILTER RIGHT DIFFERENTIAL AMP RIGHT + BALANCED AMP RIGHT - BALANCED AMP MUTE MUTE + - RIGHT BALANCED 20VAC 0/60Hz POWER SWITCH FUSE POWER TRANSFORMER POWER CONTROL DIGITAL LOW VOLTAGE SUPPLY 3.3V V V 3.3V STANDBY LOW VOLTAGE SUPPLY 6
6 INTERCONNECT 6 DATAPORT 2 MAIN 3 4 KEYBOARD DISPLAY 7 8 SETUP LED KBLED SETUP REM NSV STBY/LED STBY/ON SETUP LED KBLED SETUP REM NSV STBY/LED STBY/ON REM LCLK SCLK DATA NSV J J J2 J FIL FIL2 VD -29V NSV CE CL DI BLK STBY/ON SETUP NC LEVB LEVA REM SETUP LED INPUT CW INPUT CCW BLK GRN AC6V GRN AC6V RED AC26V BLK AC26VCT RED AC26V YEL AC4V BLU AC4VCT YEL AC4V 20V B 20V B 0V B 20V A 00V A 0V A FIL FIL VD -29V NSV LCLK2 SCLK2 DATA2 BLK STBY/ON SETUP BYPASS LED LEVB LEVA REM SETUP LED INPUT CW INPUT CCW J3 J2 6 J J6 6 6 J0 8 J4 J8 J7 6 J9 GRN T GRN YEL BLU YEL RED BLK BLU GRY VIO ORN BLK WHT RED AC L AC H WHT 20V B ORN 20V B VIO 0V B GRY 20V A BLU 00V A BLK 0V A 20V B 20V B 0V B 20V A 00V A 0V A 20V B 20V B 0V B 20V A 00V A 0V A MODULE REM LCLK SCLK DATA NSV 240V 220V 20V 00V S POWER WHT BLK 20V AC 0/60Hz
7 2 MAIN SH OF 4 MDA
8 2 MAIN SH 2 OF 4 2
9 2 MAIN SH 3 OF 4 MDA
10 2 MAIN SH 4 OF 4 6
11 2 MAIN MDA000 3 MODULE O
12 4 KEYBOARD J2:8 NSV J: V SENSOR J2:2 SETUP LED J: Q 2 3 R 0 Vout MT Vcc C2 47uF C3.uF 2 3 R2 7 J2: J2:6 J2: REM J:8 J:7 J:2 C 0uF.9V DS DS R2 Q DS2* J* MT C R C3 C2 DS3 J2:3 J2:4 J2:7 J2:9 J2:0 J2: J2:2 KBLED SETUP STBY LED STBY/ON J:0 J:9 J:6 J:4 J:3 J:2 J:.9V S S2 DS2 DS3 SETUP STANDBY/ON S 2948 Rev.A * Denotes components on the reverse or backside of the Pc Bd S2 9 20
13 DISPLAY MDA
14 6 DATAPORT
15 PARTS LIST Ref. No. Description Part No. MAIN PCB C CAP MPF 0.0UF % 63VDC C2 CAP MONO.uF 0V 20% ZU 0630 C3 CAP MONO.uF 0V 20% ZU 0630 C4 CAP ELECT 47UF 2V C CAP MPF 0.022UF % 63VDC C6 CAP ELECT 47UF 2V C7 CAP MPF 0.0UF % 63VDC C8 CAP MPF 0.0UF % 63VDC C9 CAP MPF 0.0UF % 63VDC C0 CAP MPF 0.0UF % 63VDC C CAP PF 0.00UF % 63VDC C2 CAP MPF 0.0UF % 63VDC C3 CAP MPF 0.0UF % 63VDC C4 CAP MPF 0.0UF % 63VDC C CAP MONO.uF 0V 20% ZU 0630 C6 CAP MPF 0.0UF % 63VDC C7 CAP MONO.uF 0V 20% ZU 0630 C8 CAP ELECT 0UF 00VDC 0664 C9 CAP MONO.uF 0V 20% ZU 0630 C20 CAP MONO.uF 0V 20% ZU 0630 C2 CAP MONO.uF 0V 20% ZU 0630 C22 CAP ELECT 0UF 00VDC 0664 C23 CAP MONO.uF 0V 20% ZU 0630 C24 CAP MONO.0UF 0V 20% X7R C2 CAP MONO.0UF 0V 20% X7R C27 CAP MONO.0UF 0V 20% X7R C28 CAP MONO.0UF 0V 20% X7R C29 CAP MONO.0UF 0V 20% X7R C30 CAP ELECT 47UF 2V C3 CAP MONO.uF 0V 20% ZU 0630 C32 CAP MONO.0UF 0V 20% X7R C33 CAP MONO.uF 0V 20% ZU 0630 C34 CAP ELECT 00UF 2V C3 CAP MONO.uF 0V 20% ZU 0630 C36 CAP MONO.uF 0V 20% ZU 0630 C37 CAP ELECT 00UF 2V C38 CAP MONO.uF 0V 20% ZU 0630 C39 CAP ELECT 000UF 2V 0663 C40 CAP MPF 0.033UF 00V 0% C4 CAP MPF 0.033UF 00V 0% C42 CAP ELECT 220UF 0V 20% C43 CAP MONO 00PF 00V 0% NPO C44 CAP ELECT 47UF 2V C4 CAP MONO.uF 0V 20% ZU 0630 C46 CAP MONO.uF 0V 20% ZU 0630 C47 CAP ELECT 3300UF 3V C48 CAP ELECT 3300UF 3V C49 CAP ELECT 3300UF 3V C0 CAP ELECT 3300UF 3V C CAP MONO.0UF 0V 20% X7R C2 CAP MONO.uF 0V 20% ZU 0630 C3 CAP MONO.uF 0V 20% ZU 0630 C4 CAP MONO.uF 0V 20% ZU 0630 C CAP MONO.uF 0V 20% ZU 0630 C6 CAP MONO.uF 0V 20% ZU 0630 C7 CAP ELECT 220UF 0V 20% C8 CAP ELECT 47UF 0V 0662 C9 CAP ELECT 220UF 2V AUDIO MDA000 C60 CAP ELECT 220UF 2V AUDIO C6 CAP ELECT 220UF 2V AUDIO C62 CAP ELECT 220UF 2V AUDIO C63 CAP ELECT 220UF 2V AUDIO C64 CAP ELECT 47UF 0V 0662 C6 CAP ELECT 220UF 2V AUDIO C66 CAP ELECT 0UF 6V 4X CASE C67 CAP ELECT 0UF 6V 4X CASE C68 CAP ELECT 0UF 6V 4X CASE C69 CAP ELECT 0UF 6V 4X CASE C70 CAP ELECT 0UF 6V 4X CASE C7 CAP ELECT 0UF 6V 4X CASE C72 CAP ELECT 0UF 6V 4X CASE C73 CAP ELECT 0UF 6V 4X CASE C74 CAP ELECT 47UF 6V 6.3X CASE C7 CAP ELECT 47UF 6V 6.3X CASE C76 CAP ELECT 00UF 6V MM C77 CAP ELECT 47UF 6V 6.3X CASE C78 CAP ELECT 47UF 6V 6.3X CASE C79 CAP ELECT 00UF 6V MM C80 CAP ELECT 47UF 6V 6.3X CASE C8 CAP ELECT 47UF 6V 6.3X CASE C82 CAP ELECT 00UF 6V MM C83 CAP ELECT 47UF 6V 6.3X CASE C84 CAP ELECT 47UF 6V 6.3X CASE C8 CAP ELECT 00UF 6V MM C86 CAP ELECT 0UF 6V 4X CASE C87 CAP ELECT 0UF 6V 4X CASE C88 CAP ELECT 0UF 6V 4X CASE C89 CAP ELECT 0UF 6V 4X CASE C90 CAP ELECT 0UF 6V 4X CASE C9 CAP ELECT 0UF 6V 4X CASE C92 CAP ELECT 0UF 6V 4X CASE C93 CAP ELECT 0UF 6V 4X CASE C94 CAP ELECT 0UF 6V 4X CASE C9 CAP ELECT 0UF 6V 4X CASE C96 CAP ELECT 0UF 6V 4X CASE C97 CAP ELECT 0UF 6V 4X CASE C98 CAP ELECT 0UF 6V 4X CASE C99 CAP ELECT 0UF 6V 4X CASE C00 CAP ELECT 0UF 6V 4X CASE C0 CAP ELECT 0UF 6V 4X CASE C02 CAP ELECT 47UF 6V 6.3X CASE C03 CAP ELECT 47UF 6V 6.3X CASE C04 CAP ELECT 00UF 6V MM C0 CAP ELECT 47UF 6V 6.3X CASE C06 CAP ELECT 47UF 6V 6.3X CASE C07 CAP ELECT 00UF 6V MM C08 CAP ELECT 47UF 6V 6.3X CASE C09 CAP ELECT 47UF 6V 6.3X CASE C0 CAP ELECT 00UF 6V MM C CAP ELECT 47UF 6V 6.3X CASE C2 CAP ELECT 47UF 6V 6.3X CASE C3 CAP ELECT 00UF 6V MM C4 CAP ELECT 0UF 6V 4X CASE C CAP ELECT 0UF 6V 4X CASE C6 CAP ELECT 0UF 6V 4X CASE C7 CAP ELECT 0UF 6V 4X CASE C8 CAP ELECT 0UF 6V 4X CASE C9 CAP ELECT 0UF 6V 4X CASE C20 CAP ELECT 0UF 6V 4X CASE C2 CAP ELECT 0UF 6V 4X CASE C22 CAP MONO 00PF 00V 0% NPO C23 CAP MONO 00PF 00V 0% NPO C24 CAP MONO 00PF 00V 0% NPO C2 CAP MONO 00PF 00V 0% NPO C26 CAP MONO 00PF 00V 0% NPO C27 CAP MONO 00PF 00V 0% NPO C28 CAP ELECT 47UF 2V C29 CAP ELECT 47UF 2V C30 CAP ELECT 47UF 2V C3 CAP ELECT 47UF 2V C32 CAP MONO.uF 0V 20% ZU 0630 C33 CAP MONO.uF 0V 20% ZU 0630 C34 CAP ELECT 0UF 00VDC 0664 C3 CAP ELECT 0UF 00VDC 0664 C36 CAP ELECT 0UF 00VDC 0664 C37 CAP ELECT 0UF 00VDC 0664 C38 CAP ELECT 0UF 00VDC 0664 C39 CAP ELECT 0UF 00VDC 0664 C40 CAP MONO.uF 0V 20% ZU 0630 C4 CAP MONO.uF 0V 20% ZU 0630 C42 CAP MONO.uF 0V 20% ZU 0630 C43 CAP MONO.uF 0V 20% ZU 0630 C44 CAP POLYPROP 4700PF 2.% 63VDC C4 CAP POLYPROP 4700PF 2.% 63VDC C46 CAP POLYPROP 4700PF 2.% 63VDC C47 CAP POLYPROP 4700PF 2.% 63VDC C48 CAP POLYPROP 470PF % 00VDC C49 CAP POLYPROP 470PF % 00VDC C0 CAP POLYPROP 470PF % 00VDC C CAP POLYPROP 470PF % 00VDC C2 CAP POLYPROP.00UF % 00VDC C3 CAP POLYPROP.00UF % 00VDC C4 CAP POLYPROP.00UF % 00VDC C CAP POLYPROP.00UF % 00VDC C6 CAP MONO.uF 0V 20% ZU 0630 C7 CAP ELECT 0UF 00VDC 0664 C8 CAP ELECT 0UF 00VDC 0664 C9 CAP MONO.uF 0V 20% ZU 0630 C60 CAP MPF 0.UF % 63VDC C6 CAP MPF 0.UF % 63VDC C62 CAP POLYPROP 680PF 2.% 00VDC C63 CAP POLYPROP 680PF 2.% 00VDC C64 CAP POLYPROP 680PF 2.% 00VDC C6 CAP POLYPROP 680PF 2.% 00VDC C66 CAP MPF 0.UF % 63VDC C67 CAP MPF 0.UF % 63VDC C68 CAP MPF 0.UF % 63VDC C69 CAP MPF 0.UF % 63VDC C70 CAP ELECT 47UF 2V C7 CAP ELECT 47UF 2V C72 CAP ELECT 47UF 2V C73 CAP ELECT 47UF 2V C74 CAP ELECT 47UF 2V C7 CAP ELECT 47UF 2V D DIODE RECTIFIER 0703 D2 DIODE RECTIFIER 0703 D3 DIODE SILICON D4 DIODE RECTIFIER 0703 D DIODE RECTIFIER 0703 D6 DIODE RECTIFIER 0703 D7 DIODE RECTIFIER 0703 D8 DIODE RECTIFIER 0703 D9 DIODE RECTIFIER 0703 D0 DIODE RECTIFIER 0703 D DIODE RECTIFIER 0703 D2 DIODE RECTIFIER
16 PARTS LIST con t D3 DIODE SILICON D4 DIODE SILICON D DIODE RECTIFIER 0703 D6 DIODE ZENER 6.2V % 00MW D7 DIODE SILICON D8 DIODE SILICON D9 DIODE SILICON D20 DIODE ZENER 30V /2W % 0706 D2 DIODE SILICON D22 DIODE FAST RECOVER 0706 D23 DIODE FAST RECOVER 0706 D24 DIODE FAST RECOVER 0706 D2 DIODE FAST RECOVER 0706 D26 DIODE FAST RECOVER 0706 D27 DIODE FAST RECOVER 0706 D28 DIODE FAST RECOVER 0706 D29 DIODE FAST RECOVER 0706 D30 DIODE FAST RECOVER 0706 D3 DIODE FAST RECOVER 0706 D32 DIODE FAST RECOVER 0706 D33 DIODE FAST RECOVER 0706 D34 DIODE FAST RECOVER 0706 D3 DIODE FAST RECOVER 0706 D36 DIODE FAST RECOVER 0706 D37 DIODE FAST RECOVER 0706 D38 DIODE FAST RECOVER 0706 D39 DIODE FAST RECOVER 0706 D40 DIODE SILICON D4 DIODE SILICON F 0.A x20 fuse IEC FN FILTER EMI 8007 FN2 FILTER EMI 8007 FN3 FILTER EMI 8007 FN4 FILTER EMI 8007 FN FILTER EMI 8007 HS2 HEATSINK TO HS3 HEATSINK TO HS4 HEATSINK TO HS HEATSINK TO J XLR FEMALE HORIZ PCB WITH LATCH 784 J2 JACK RCA ORANGE WITH GOLD 7798 J3 JACK RCA ORANGE WITH GOLD 7798 J4 JACK RCA ORANGE WITH GOLD 7798 J 6 PIN HEADER 7828 J6 CONN 23 PIN FFC 77 J7 BLADE FASTON W/FEET 7708 J8 BLADE FASTON W/FEET 7708 J9 CONN PCB MOUNT POWER RED 779 J0 CONN PCB MOUNT POWER RED 779 J CONN PCB MOUNT POWER RED 779 J2 CONN PCB MOUNT POWER RED 779 J3 CONN 2 PIN FFC 7720 J4 HEADER 8 PIN MTA J JACK HEADPHONE STEREO /8IN 779 J6 JACK HEADPHONE STEREO /8IN 779 J7 JACK HEADPHONE STEREO /8IN 779 J8 JACK HEADPHONE STEREO /8IN 779 J9 0 PIN HEADER 7829 J20 RECEPTACLE XLR MALE 7686 J2 JACK PHONO DUAL WHT/RED 7692 J22 RECEPTACLE XLR MALE 7686 K REED FORM C V 2 OHM K2 REED FORM C V 2 OHM K3 REED FORM C V 2 OHM K4 REED FORM C V 2 OHM K REED FORM A V 00 OHMS K6 REED FORM A V 00 OHMS K7 REED FORM A V 00 OHMS K8 REED FORM A V 00 OHMS K9 REED FORM A V 00 OHMS K0 REED FORM A V 00 OHMS K REED FORM A V 00 OHMS L CHOKE 8uH %-0% L2 CHOKE 8uH %-0% L3 CHOKE 8uH %-0% L4 BEADS FERRITE LEADED L BEADS FERRITE LEADED L6 BEADS FERRITE LEADED L7 CHOKE 00UH 2232 L8 CHOKE 8uH %-0% L9 CHOKE 8uH %-0% L0 CHOKE 8uH %-0% L CHOKE 8uH %-0% L2 BEADS FERRITE LEADED OPT Fiber Optic Receiver 086 OPT2 Fiber Optic Receiver 086 OPT3 Fiber Optic Receiver 086 Q TRANSISTOR PNP SILICON 3272 Q2 TRANSISTOR PNP Q3 TRANSISTOR NPN SILICON 327 Q4 COUPLER OPTICAL SCHMITT OUTPUT 3023 Q TRANSISTOR PNP SILICON 3272 Q6 TRANSISTOR NPN Q7 TRANSISTOR PNP Q8 TRANSISTOR NPN Q9 TRANSISTOR PNP Q0 TRANSISTOR NPN Q TRANSISTOR PNP Q2 TRANSISTOR NPN Q3 TRANSISTOR PNP Q4 TRANSISTOR NPN Q TRANSISTOR PNP Q6 TRANSISTOR NPN Q7 TRANSISTOR PNP R RES MF 7 OHM % /4W R2 RES MF 0 OHM % /4W R3 RES MF 7 OHM % /4W R4 RES MF 47.K % /4W 4408 R RES MF 47.K % /4W 4408 R6 RES MF 7 OHM % /4W R7 RES MF 2.87K % /4W 4442 R8 RES MF 47.K % /4W 4408 R9 RES MF 22 OHM % /4W 4472 R0 RES MF 47.K % /4W 4408 R RES MF 22 OHM % /4W 4472 R2 RES MF 22 OHM % /4W 4472 R3 RES MF 22 OHM % /4W 4472 R4 RES MF 22 OHM % /4W 4472 R RES NETWORK 9X R6 RES MF 22 OHM % /4W 4472 R7 RES MF 22 OHM % /4W 4472 R8 RES MF 22 OHM % /4W 4472 R9 RES MF 22 OHM % /4W 4472 R20 RES MF 22 OHM % /4W 4472 R2 RES MF 332 OHM % /4W R22 RES MF 22 OHM % /4W 4472 R23 RES MF 22 OHM % /4W 4472 R24 RES MF 22 OHM % /4W 4472 R2 RES MF 2.2 OHM /4W % R26 RES MF 22 OHM % /4W 4472 R27 RES MF 22.K % /4W 4487 R28 RES MF.K % /4W 4428 R29 RES MF 0 OHM % /4W 447 R30 RES MF 22.K % /4W 4487 R3 RES MF 4.7K % /4W R32 RES MF 22 OHM % /4W 4472 R33 RES MF 22 OHM % /4W 4472 R34 RES MF 22 OHM % /4W 4472 R3 RES MF 00K % /4W 443 R36 RES MF 47.K % /4W 4408 R37 RES MF 47 OHM % /4W R38 RES MF 22 OHM % /4W 4472 R39 RES MF 47 OHM % /4W R40 PTC RESETTABLE FUSE R4 PTC RESETTABLE FUSE R42 RES FP 0 OHM % /4W 3702 R43 RES MF 47.K % /4W 4408 R44 RES CF 0 OHM % /2W 46 R4 RES MF 806 OHM % /4W R46 RES MF 47K % /4W R47 RES MF 47.K % /4W 4408 R48 RES MF 0K % /4W 4403 R49 RES MF 62 OHM % /4W R0 RES MF K % /4W R RES MF 0K % /4W 4403 R2 RES MF 22.K % /4W 4487 R3 RES MF 22.K % /4W 4487 R4 RES MF 47. OHM % /4W R RES MF.K % /4W 4428 R6 RES MF 47. OHM % /4W R7 RES MF 47. OHM % /4W R8 RES MF 0K % /4W 4403 R9 RES MF 22. OHM % /4W 4460 R60 RES MF 22. OHM % /4W 4460 R6 RES MF 22. OHM % /4W 4460 R62 RES MF 47. OHM % /4W R63 RES MF 00K % /4W 443 R64 RES MF 00K % /4W 443 R6 RES MF 00K % /4W 443 R66 RES MF 00K % /4W 443 R67 RES MF.2K % /4W 449 R68 RES MF.2K % /4W 449 R69 RES MF.2K % /4W 449 R70 RES MF.2K % /4W 449 R7 RES MF 00K % /4W 443 R72 RES MF 00K % /4W 443 R73 RES MF 00K % /4W 443 R74 RES MF 00K % /4W 443 R7 RES MF.K % /4W 4428 R76 RES MF.K % /4W 4428 R77 RES MF.K % /4W 4428 R78 RES MF.K % /4W 4428 R79 RES MF 2K % /4W R80 RES MF 2K % /4W R8 RES MF 2K % /4W R82 RES MF 2K % /4W R83 RES MF.K % /4W 4428 R84 RES MF.K % /4W
17 MDA000 PARTS LIST con t R8 RES MF.K % /4W 4428 R86 RES MF.K % /4W 4428 R87 RES MF 3.74K % /4W R88 RES MF 3.74K % /4W R89 RES MF 3.4K % /4W R90 RES MF 3.4K % /4W R9 RES MF 3.74K % /4W R92 RES MF 3.74K % /4W R93 RES MF 3.4K % /4W R94 RES MF 3.4K % /4W R9 RES MF.69K % /4W R96 RES MF.69K % /4W R97 RES MF.69K % /4W R98 RES MF.69K % /4W R99 RES MF 4.7K % /4W R00 RES MF 0 OHM % /4W 447 R0 RES MF 4.7K % /4W R02 RES MF 4.7K % /4W R03 RES MF 4.7K % /4W R04 RES MF 0 OHM % /4W 447 R0 RES MF 0 OHM % /4W 447 R06 RES MF 0 OHM % /4W 447 R07 RES MF 0 OHM % /4W 447 R08 RES MF 0 OHM % /4W 447 R09 RES MF 4.7K % /4W R0 RES MF 4.7K % /4W R RES MF 4.7K % /4W R2 RES MF 4.7K % /4W R3 RES MF 4.7K % /4W R4 RES MF 4.7K % /4W R RES MF 4.7K % /4W R6 RES MF 4.7K % /4W R7 RES MF 0 OHM % /4W 447 R8 RES MF 0 OHM % /4W 447 R9 RES MF 0 OHM % /4W 447 R20 RES MF 0 OHM % /4W 447 R2 RES MF 0 OHM % /4W 447 R22 RES MF 0 OHM % /4W 447 R23 RES MF 0 OHM % /4W 447 R24 RES MF 0 OHM % /4W 447 R2 RES MF 47.K % /4W 4408 R26 RES MF 47.K % /4W 4408 R27 RES MF 47.K % /4W 4408 R28 RES MF 47.K % /4W 4408 R29 RES MF 47.K % /4W 4408 R30 RES MF 47.K % /4W 4408 R3 RES MF 22. OHM % /4W 4460 R32 RES MF 22. OHM % /4W 4460 R33 RES MF 22. OHM % /4W 4460 R34 RES MF 22. OHM % /4W 4460 R3 RES MF 22. OHM % /4W 4460 R36 RES MF 22. OHM % /4W 4460 R37 RES MF 47.K % /4W 4408 R38 RES MF 47.K % /4W 4408 R39 RES MF 47.K % /4W 4408 R40 RES MF 47.K % /4W 4408 R4 RES MF 47.K % /4W 4408 R42 RES MF 47.K % /4W 4408 R43 RES MF 4.02K % /4W R44 RES MF K % /4W R4 RES MF K % /4W R46 RES MF K % /4W R47 RES MF K % /4W R48 RES MF K % /4W R49 RES MF K % /4W R0 RES MF K % /4W R RES MF K % /4W R2 RES MF 47. OHM % /4W R3 RES MF 47 OHM % /4W RL V DPST RL2 V DPST T TRANSFORMER DIGITAL INTERFACE 928 U DIFFERENTIAL RECEIVER 3348 U2 DIGITAL INTERFACE RECEIVER U3 SINGLE 2-INPUT NOR GATE 3300 U4 DUAL D-FLIP-FLOP U SINGLE 2-INPUT AND GATE 3302 U6 PROGRAMMED VERSION OF U7 SINGLE 2-INPUT NAND GATE 330 U8 OCTAL BUFFER WITH 3 STATE 3303 U9 SINGLE 2-INPUT AND GATE 3302 U0 REGULATOR 3.3V LOW DROP U IC REGULATOR V.A LOW DROP 3336 U2 IC AND 2 INPUT X U3 IC MONOSTB MULTIVIB X U4 IC REGULATOR 3.3V LOW DROPOUT U IC REGULATOR V.A LOW DROP 3336 U6 -V LOW DROPOUT REGULATOR U7 IC REGULATOR 2V 336 U8 IC REGULATOR -2V 33 U9 IC D/A CONVERTER 24 BIT U20 IC D/A CONVERTER 24 BIT U2 IC D/A CONVERTER 24 BIT U22 IC D/A CONVERTER 24 BIT U23 IC D/A CONVERTER 24 BIT U24 IC D/A CONVERTER 24 BIT U2 IC D/A CONVERTER 24 BIT U26 IC D/A CONVERTER 24 BIT U27 IC OP AMP DUAL FET INPUT U28 IC OP AMP DUAL FET INPUT U29 STEREO VOLUME CONTROL 330 U30 STEREO VOLUME CONTROL 330 U3 IC DUAL OPERATIONAL AMPLIFIER U32 IC DUAL OPERATIONAL AMPLIFIER U33 IC DUAL OPERATIONAL AMPLIFIER U34 IC DUAL OPERATIONAL AMPLIFIER U3 IC DUAL OPERATIONAL AMPLIFIER Y RESONATOR CERAMIC 6.0MHZ W/CAP UPSAMPLING MODULE KEYBOARD PCB C CAP ELECT 0UF 6V 4X CASE C2 CAP ELECT 47UF 6V 6.3X CASE C3 CAP MONO.uF 0V 20% ZU 0630 DS LED SQUARE RED 0809 DS2 LED GREEN MM HI-INT VF[V] DS3 LED SQUARE RED 0809 J CONN 2 PIN FFC 7720 MT SENSOR IR 38KHZ 2046 Q TRANSISTOR NPN R RES MF 0 OHM % /4W R2 RES MF 7 OHM % /4W S SWITCH PB TACT 008 S2 SWITCH PB TACT 008 DISPLAY PCB C CAP ELECT 0UF 6V 4X CASE C2 CAP MONO.uF 0V 20% ZU 0630 C3 CAP ELECT 0UF 0V LOW ESR C4 CAP MONO 22PF 200V 0% NPO C CAP MONO.uF 0V 20% ZU 0630 C6 CAP ELECT 47UF 6V 6.3X CASE DS LED GREEN MM HI-INT VF[V] DS2 LED GREEN MM HI-INT VF[V] DS3 LED GREEN MM HI-INT VF[V] DS4 6 Digits VF display 0869 J CONN 23 PIN FFC 77 J2 CONN 2 PIN FFC 7720 L CHOKE 8uH %-0% L2 BEADS FERRITE LEADED L3 BEADS FERRITE LEADED R RES MF 332 OHM % /4W R2 RES MF 00 OHM % /4W 4496 R3 RES MF 00 OHM % /4W 4496 R4 RES MF 00 OHM % /4W 4496 R RES MF 00 OHM % /4W 4496 R6 RES MF 47.K % /4W 4408 R7 RES NETWORK 3X22K BUSSED 4422 R8 RES MF.62K OHM % /4W S 6 ENCODER S2 ENCODER OPTICAL ROTARY U VFD DRIVER DATAPORT PCB C CAP MONO.uF 0V 20% ZU 0630 C2 CAP ELECT 0UF 0V J CONN 2 PIN FFC 7720 J2 JACK HEADPHONE STEREO /8IN 779 J3 JACK HEADPHONE STEREO /8IN 779 J4 JACK HEADPHONE STEREO /8IN 779 J JACK HEADPHONE STEREO /8IN 779 J6 JACK HEADPHONE STEREO /8IN 779 J7 JACK HEADPHONE STEREO /8IN 779 J8 JACK HEADPHONE STEREO /8IN 779 L BEADS FERRITE LEADED R RES MF 00K % /4W 443 R2 RES NETWORK 3X22K BUSSED 4422 R3 RES MF 00 OHM % /4W 4496 R4 RES MF 00 OHM % /4W 4496 R RES MF 00 OHM % /4W 4496 R6 RES MF 00 OHM % /4W 4496 R7 RES MF 00 OHM % /4W 4496 R8 RES MF 00 OHM % /4W 4496 R9 RES MF 00 OHM % /4W 4496 R RES MF 47. OHM % /4W SP BRACKET PCB CARD MOUNTING 0036 SP2 BRACKET PCB CARD MOUNTING 0036 U IC SHFT REG SER-PAR 3386 U2 LB720 DRIVER ARRAY
18 EXPLODED VIEW and PARTS LIST Ref No. Part No Description CENTER GLASS PANEL RIGHT GLASS PANEL LEFT GLASS PANEL PUSHBUTTON ASSY BLK PUSHBUTTON ASSY RED O-RING SWITCH DPDT ROCKER TAPE VINYL FOAM /6 X /4 EXTRUSION CENTER END CAP TOP/BOTTOM END CAP SCREW 6-32 X 3/8 FILLISTER HD DISPLAY FILTER PLATE BACK GAP PLATE SCREW MACH SEMS 6-32 X /6 PH PN SCREW TAPPING 4-40 X /4 PH PN ASSY KEYBOARD PCB CIRCUIT BOARD SUPPORT TITLE/PUSHBUTTON BACKLIGHT LOGO/PUSHBUTTON BACKLIGHT CIRCUIT BOARD SUPPORT ASSY DISPLAY PCB SCREW TT SEMS 6-32 X /4 PH PN SUBPANEL TRANSFORMER R-CORE POWER MTA CONN 8 PIN.6 NUT MACH 6-32 W/LOCK TOP PANEL TOP STRIP TAPE DOUBLE SIDED / GOLD STRIP GLASS TOP COVER FOAM PAD TRAY NUT CAP 6-32 ASSY KNOB 40 METRIC W/O INDEX ASSY KNOB 40 AMER W/O INDEX BLK FELT WASHER 3/4 X /4 X /6 SCREW 6-32 X /4 PHIL FLAT SCREW TAP SEMS 6-32 X /4 PH PN ASSY MAIN PCB ASSY UPSAMPLING PCB DECAL UPSAMPLING DECAL D/A CONVERTER LEFT DECAL D/A CONVERTER RIGHT PCB BRACE ASSY DATAPORT PCB RECEPTACLE INPUT & LINE FILTER NUT KEP 4-40 CADMIUM PLATE NUT MACH 6-32 SELF-LOCK REAR PANEL SCREW HI-LO 6-32 X /4 PH PN SCREW 0-32 X /2 LOW SHCS SIDE PANEL SIDE PANEL SCREW 6-32 X /6 PH PN BLK BOTTOM COVER FOOT WASHER #0 PLATED SCREW MACH 0-32 X 3/4 PH PN BLK 32
19 REPACKING INSTRUCTIONS MDA000 33
20 D/A CONVERTER 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 3903 Printed in U.S.A. Part Number
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