McIntosh-MDA1000-dac-sm 维修电路原理图.pdf

《McIntosh-MDA1000-dac-sm 维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《McIntosh-MDA1000-dac-sm 维修电路原理图.pdf（20页珍藏版）》请在收音机爱好者资料库上搜索。

1、SERVICE MANUALPerformance Specifications . 2Notes . 2Rear Panel . 3Section Location . 4Block Diagram . 5 - 6Interconnection Diagram . 7 - 8Main Schematic and PCB. 9 - 18Keyboard Supply Schematic and PCB . 19 - 20Display Schematic and PCB . 21 - 22Dataport Schematic and PCB . 23 - 24Parts List . 25 -

2、 30Exploded View and Parts List . 31 - 32Repacking Instructions . 33CONTENTSD/A CONVERTERRadioFans.CN 收音机爱 好者资料库PERFORMANCE SPECIFICATIONS21. The heavy notes on the schematic denote the primarysignal path.2. Unless otherwise noted, all voltages indicated on theschematics are measured under the follo

3、wing conditions:a. AC input at 120 volts, 50/60Hz.b. All voltages are +/-10% with respect to ground. Ahigh impedance (10 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

4、. On PC board drawings, Square pad indicates:a. Polarized Capacitors - Positiveb. Diodes - Cathodec. Others - Pin 15. WARNINGParts marked with the symbol have criticalcharacteristics. Use only replacement parts recom-mended by the manufacturer.NOTESAnalog Audio SpecificationsFrequency Response+/-0.5

5、dB from 4Hz to 45,000Hz(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 44.1kHz)+/-0.3dB from 4Hz to 15,000Hz(Sampling Frequency 32kHz)Total Harmonic Distortion0.002% at 1,000HzSignal To Noise RatioBetter th

6、an 110dB (A Weighted)Dynamic RangeBetter than 100dB (1,000Hz)Rated Output Voltage2V 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 SpecificationsDigital Audio FormatIEC958, S/PDIFCoaxial

7、Inputs (1, 2 and 3)0.5V p-p 75ohmsOptical Inputs (4, 5 and 6)-15 -20dBmXRL Input (7)5V p-p 110ohmsSampling Frequencies96kHz, 48kHz, 44.1kHz and 32kHzGeneral SpecificationsPower Requirements100 Volts 50.60Hz, 20 watts110 Volts 50/60Hz, 20 watts120 Volts 50/60Hz, 20 watts220 Volts 50/60Hz, 20 watts230

8、 Volts 50/60Hz, 20 watts240 Volts 50/60Hz, 20 wattsNote: Refer to the rear panel of the MDA1000 for the correct voltage.Overall DimensionsWidth is 17-1/2 inches (44.45cm), Height is 6 inches(15.24cm) including feet, Depth is 16-1/8 inches(40.96cm) including Front Panel and KnobsWeight24 pounds (10.8

9、9kg) net, 38 pounds (17.24kg) inshipping cartonRadioFans.CN 收音机爱 好者资料库3MDA1000TOP AND REAR PANEL4SECTION LOCATIONSTOP VIEW WITH COVER REMOVED5DISPLAYPCB62DATAPORTPCBMAINPCB3UPSAMPLINGPCB4KEYBOARDPCBTRANSFORMER56BLOCK DIAGRAMMDA1000LEFT +I/VCONV.LEFT -I/VCONV.RIGHT +I/VCONV.RIGHT -I/VCONV.LEFT +24BIT

10、D/ACONVERTERLEFT +24BITD/ACONVERTERLEFT -24BITD/ACONVERTERLEFT -24BITD/ACONVERTERRIGHT +24BITD/ACONVERTERRIGHT +24BITD/ACONVERTERRIGHT -24BITD/ACONVERTERRIGHT -24BITD/ACONVERTERBCKLRCKLDATARDATALRCKDATABCKMCKRESETMICROCONTROLLERDISPLAYDRIVERINPUTLEVELSELECTSETUPCONTROLSPOWERCONTROLRELAYSTANDBYLOW VO

11、LTAGESUPPLYPOWERTRANSFORMERFUSEPOWERSWITCH120VAC50/60HzPOWERCONTROLINOUTPOWERCONTROL5V3.3V15V5V-5V-15VDIGITALLOW VOLTAGESUPPLY5V3.3VDISPLAYANALOGVOLTAGESUPPLYV. F.DISPLAYIR INPUTIRSENSORDATA INPUT1234567DATAPORTDATA PORTDRIVERDIGITALINTERFACERECEIVERXLRDIFFERENTIALAMP312654COAXIALCOAXIALCOAXIALOPTIC

12、ALOPTICALOPTICAL7DIGITAL INPUTLEFTBALANCEDLEFTUNBALANCED+-RIGHTBALANCED+-OUTPUTSRIGHTUNBALANCEDMUTERELAYMUTERELAYMUTERELAYMUTERELAYMUTERELAYMUTERELAYLEFT +BALANCEDAMPLEFT -BALANCEDAMPRIGHT +BALANCEDAMPRIGHT -BALANCEDAMPLEFTDIFFERENTIALAMPRIGHTDIFFERENTIALAMPLEFT +FILTERLEFT -FILTERRIGHT +FILTERRIGHT

13、 -FILTERLEFTBALANCEDOUTPUTLEVELCONTROLRIGHTBALANCEDOUTPUTLEVELCONTROLBYPASSCONTROLRELAYBYPASSCONTROLRELAYBYPASSCONTROLRELAYBYPASSCONTROLRELAYS/FDIVIDER768KHzUPSAMPLINGMODULE78INTERCONNECT1KEYBOARDDISPLAYMAIN2543DATAPORT6NS5VGNDDATAGNDSCLKGNDLCLKGNDGNDGNDREMGND1J1GNDSTBY/ONGNDSTBY/LEDNS5VGNDREMGNDSET

14、UPSETUP LEDKBLEDGND1J1GNDSTBY/ONGNDSTBY/LEDNS5VGNDREMGNDSETUPSETUP LEDKBLEDGND1J2INPUT CCWINPUT CWSETUP LEDREMLEVALEVBNCSETUPSTBY/ONDICEGND-29VGND5VDFIL1BLKCLNS5VGNDGNDGNDFIL21J1NS5VGNDDATA1GNDSCLK1GNDLCLK1GNDGNDGNDREMGND1J13AC14VINPUT CCWINPUT CWAC26VCTREMLEVALEVBBYPASS LEDSETUPBLKSCLK2NS5VAC6VAC26

15、VAC26VAC14VCTSTBY/ONDATA2LCLK2GNDAC6VSETUP LEDAC14V1J6J916120V B20V B0V B120V A100V A0V AJ1016J1116J121618J14240V220V100V120V120V B20V B0V B120V A100V A0V A120V B20V B0V B120V A100V A0V A120V B20V B0V B120V A100V A0V AJ8J7BLKS1POWERWHTORNVIOGRYBLUBLKGRNGRNYELBLUYELREDBLKREDORNWHTVIOGRYBLUBLKT1WHTBLK

16、120V AC50/60HzMODULE049999GRNGRNYELBLUYELREDBLKREDGNDGNDGNDFIL-29VGND5VDFILAC HAC LMAIN 049988 SH 1 OF 42MDA10009101112MAIN 049988 SH 2 OF 421314MDA1000MAIN 049988 SH 3 OF 42MAIN 049988 SH 4 OF 4215161718MAIN 0499882MDA1000MODULEO4999931920KEYBOARD 04999041.9V1.9V5VGNDGNDGNDGNDS2S1SENSORGNDREMNS5V31

17、2Q1DS2DS310uFC110R1C3.1uF75R2213VccVoutGNDMT1DS1J1:1STBY/ONSTANDBY/ONJ1:6SETUPSETUPJ1:9KBLEDJ1:8J1:11J1:5J1:3J1:2STBY LEDJ1:10J1:12J1:7SETUP LED47uFC2J1:45J2:85J2:25J2:55J2:65J2:15J2:35J2:45J2:75J2:95J2:105J2:115J2:12R1DS1DS3R2129485Q1C1C2C3J1MT1S1DS2S2* Denotes components on the reverse or backside

18、 of the Pc BdRev.A2122DISPLAY 0499895MDA10002324DATAPORT 04999162526MDA1000PARTS LISTRef. No.DescriptionPart No.1MAIN PCB 049988C1CAP MPF 0.01UF 5% 63VDC064312C2CAP MONO .1uF 50V 20% Z5U061305C3CAP MONO .1uF 50V 20% Z5U061305C4CAP ELECT 47UF 25V066413C5CAP MPF 0.022UF 5% 63VDC064316C6CAP ELECT 47UF

19、25V066413C7CAP MPF 0.01UF 5% 63VDC064312C8CAP MPF 0.01UF 5% 63VDC064312C9CAP MPF 0.01UF 5% 63VDC064312C10CAP MPF 0.01UF 5% 63VDC064312C11CAP PF 0.001UF 5% 63VDC064300C12CAP MPF 0.01UF 5% 63VDC064312C13CAP MPF 0.01UF 5% 63VDC064312C14CAP MPF 0.01UF 5% 63VDC064312C15CAP MONO .1uF 50V 20% Z5U061305C16C

20、AP MPF 0.01UF 5% 63VDC064312C17CAP MONO .1uF 50V 20% Z5U061305C18CAP ELECT 10UF 100VDC066411C19CAP MONO .1uF 50V 20% Z5U061305C20CAP MONO .1uF 50V 20% Z5U061305C21CAP MONO .1uF 50V 20% Z5U061305C22CAP ELECT 10UF 100VDC066411C23CAP MONO .1uF 50V 20% Z5U061305C24CAP MONO .01UF 50V 20% X7R061304C25CAP

21、MONO .01UF 50V 20% X7R061304C27CAP MONO .01UF 50V 20% X7R061304C28CAP MONO .01UF 50V 20% X7R061304C29CAP MONO .01UF 50V 20% X7R061304C30CAP ELECT 47UF 25V066413C31CAP MONO .1uF 50V 20% Z5U061305C32CAP MONO .01UF 50V 20% X7R061304C33CAP MONO .1uF 50V 20% Z5U061305C34CAP ELECT 100UF 25V066412C35CAP MO

22、NO .1uF 50V 20% Z5U061305C36CAP MONO .1uF 50V 20% Z5U061305C37CAP ELECT 100UF 25V066412C38CAP MONO .1uF 50V 20% Z5U061305C39CAP ELECT 1000UF 25V066513C40CAP MPF 0.033UF 100V 10%064427C41CAP MPF 0.033UF 100V 10%064427C42CAP ELECT 220UF 50V 20%066254C43CAP MONO 100PF 100V 10% NPO061300C44CAP ELECT 47U

23、F 25V066413C45CAP MONO .1uF 50V 20% Z5U061305C46CAP MONO .1uF 50V 20% Z5U061305C47CAP ELECT 3300UF 35V066509C48CAP ELECT 3300UF 35V066509C49CAP ELECT 3300UF 35V066509C50CAP ELECT 3300UF 35V066509C51CAP MONO .01UF 50V 20% X7R061304C52CAP MONO .1uF 50V 20% Z5U061305C53CAP MONO .1uF 50V 20% Z5U061305C5

24、4CAP MONO .1uF 50V 20% Z5U061305C55CAP MONO .1uF 50V 20% Z5U061305C56CAP MONO .1uF 50V 20% Z5U061305C57CAP ELECT 220UF 50V 20%066254C58CAP ELECT 47UF 50V066215C59CAP ELECT 220UF 25V AUDIO066414C60CAP ELECT 220UF 25V AUDIO066414C61CAP ELECT 220UF 25V AUDIO066414C62CAP ELECT 220UF 25V AUDIO066414C63CA

25、P ELECT 220UF 25V AUDIO066414C64CAP ELECT 47UF 50V066215C65CAP ELECT 220UF 25V AUDIO066414C66CAP ELECT 10UF 16V 4X5 CASE066382C67CAP ELECT 10UF 16V 4X5 CASE066382C68CAP ELECT 10UF 16V 4X5 CASE066382C69CAP ELECT 10UF 16V 4X5 CASE066382C70CAP ELECT 10UF 16V 4X5 CASE066382C71CAP ELECT 10UF 16V 4X5 CASE

26、066382C72CAP ELECT 10UF 16V 4X5 CASE066382C73CAP ELECT 10UF 16V 4X5 CASE066382C74CAP ELECT 47UF 16V 6.3X5 CASE066380C75CAP ELECT 47UF 16V 6.3X5 CASE066380C76CAP ELECT 100UF 16V 5MM066539C77CAP ELECT 47UF 16V 6.3X5 CASE066380C78CAP ELECT 47UF 16V 6.3X5 CASE066380C79CAP ELECT 100UF 16V 5MM066539C80CAP

27、 ELECT 47UF 16V 6.3X5 CASE066380C81CAP ELECT 47UF 16V 6.3X5 CASE066380C82CAP ELECT 100UF 16V 5MM066539C83CAP ELECT 47UF 16V 6.3X5 CASE066380C84CAP ELECT 47UF 16V 6.3X5 CASE066380C85CAP ELECT 100UF 16V 5MM066539C86CAP ELECT 10UF 16V 4X5 CASE066382C87CAP ELECT 10UF 16V 4X5 CASE066382C88CAP ELECT 10UF

28、16V 4X5 CASE066382C89CAP ELECT 10UF 16V 4X5 CASE066382C90CAP ELECT 10UF 16V 4X5 CASE066382C91CAP ELECT 10UF 16V 4X5 CASE066382C92CAP ELECT 10UF 16V 4X5 CASE066382C93CAP ELECT 10UF 16V 4X5 CASE066382C94CAP ELECT 10UF 16V 4X5 CASE066382C95CAP ELECT 10UF 16V 4X5 CASE066382C96CAP ELECT 10UF 16V 4X5 CASE

29、066382C97CAP ELECT 10UF 16V 4X5 CASE066382C98CAP ELECT 10UF 16V 4X5 CASE066382C99CAP ELECT 10UF 16V 4X5 CASE066382C100CAP ELECT 10UF 16V 4X5 CASE066382C101CAP ELECT 10UF 16V 4X5 CASE066382C102CAP ELECT 47UF 16V 6.3X5 CASE066380C103CAP ELECT 47UF 16V 6.3X5 CASE066380C104CAP ELECT 100UF 16V 5MM066539C

30、105CAP ELECT 47UF 16V 6.3X5 CASE066380C106CAP ELECT 47UF 16V 6.3X5 CASE066380C107CAP ELECT 100UF 16V 5MM066539C108CAP ELECT 47UF 16V 6.3X5 CASE066380C109CAP ELECT 47UF 16V 6.3X5 CASE066380C110CAP ELECT 100UF 16V 5MM066539C111CAP ELECT 47UF 16V 6.3X5 CASE066380C112CAP ELECT 47UF 16V 6.3X5 CASE066380C

31、113CAP ELECT 100UF 16V 5MM066539C114CAP ELECT 10UF 16V 4X5 CASE066382C115CAP ELECT 10UF 16V 4X5 CASE066382C116CAP ELECT 10UF 16V 4X5 CASE066382C117CAP ELECT 10UF 16V 4X5 CASE066382C118CAP ELECT 10UF 16V 4X5 CASE066382C119CAP ELECT 10UF 16V 4X5 CASE066382C120CAP ELECT 10UF 16V 4X5 CASE066382C121CAP E

32、LECT 10UF 16V 4X5 CASE066382C122CAP MONO 100PF 100V 10% NPO061300C123CAP MONO 100PF 100V 10% NPO061300C124CAP MONO 100PF 100V 10% NPO061300C125CAP MONO 100PF 100V 10% NPO061300C126CAP MONO 100PF 100V 10% NPO061300C127CAP MONO 100PF 100V 10% NPO061300C128CAP ELECT 47UF 25V066413C129CAP ELECT 47UF 25V

33、066413C130CAP ELECT 47UF 25V066413C131CAP ELECT 47UF 25V066413C132CAP MONO .1uF 50V 20% Z5U061305C133CAP MONO .1uF 50V 20% Z5U061305C134CAP ELECT 10UF 100VDC066411C135CAP ELECT 10UF 100VDC066411C136CAP ELECT 10UF 100VDC066411C137CAP ELECT 10UF 100VDC066411C138CAP ELECT 10UF 100VDC066411C139CAP ELECT

34、 10UF 100VDC066411C140CAP MONO .1uF 50V 20% Z5U061305C141CAP MONO .1uF 50V 20% Z5U061305C142CAP MONO .1uF 50V 20% Z5U061305C143CAP MONO .1uF 50V 20% Z5U061305C144CAP POLYPROP 4700PF 2.5% 63VDC064390C145CAP POLYPROP 4700PF 2.5% 63VDC064390C146CAP POLYPROP 4700PF 2.5% 63VDC064390C147CAP POLYPROP 4700P

35、F 2.5% 63VDC064390C148CAP POLYPROP 470PF 5% 100VDC064370C149CAP POLYPROP 470PF 5% 100VDC064370C150CAP POLYPROP 470PF 5% 100VDC064370C151CAP POLYPROP 470PF 5% 100VDC064370C152CAP POLYPROP .0015UF 5% 100VDC064369C153CAP POLYPROP .0015UF 5% 100VDC064369C154CAP POLYPROP .0015UF 5% 100VDC064369C155CAP PO

36、LYPROP .0015UF 5% 100VDC064369C156CAP MONO .1uF 50V 20% Z5U061305C157CAP ELECT 10UF 100VDC066411C158CAP ELECT 10UF 100VDC066411C159CAP MONO .1uF 50V 20% Z5U061305C160CAP MPF 0.1UF 5% 63VDC064325C161CAP MPF 0.1UF 5% 63VDC064325C162CAP POLYPROP 680PF 2.5% 100VDC064389C163CAP POLYPROP 680PF 2.5% 100VDC

37、064389C164CAP POLYPROP 680PF 2.5% 100VDC064389C165CAP POLYPROP 680PF 2.5% 100VDC064389C166CAP MPF 0.1UF 5% 63VDC064325C167CAP MPF 0.1UF 5% 63VDC064325C168CAP MPF 0.1UF 5% 63VDC064325C169CAP MPF 0.1UF 5% 63VDC064325C170CAP ELECT 47UF 25V066413C171CAP ELECT 47UF 25V066413C172CAP ELECT 47UF 25V066413C1

38、73CAP ELECT 47UF 25V066413C174CAP ELECT 47UF 25V066413C175CAP ELECT 47UF 25V066413D1DIODE RECTIFIER070131D2DIODE RECTIFIER070131D3DIODE SILICON070047D4DIODE RECTIFIER070131D5DIODE RECTIFIER070131D6DIODE RECTIFIER070131D7DIODE RECTIFIER070131D8DIODE RECTIFIER070131D9DIODE RECTIFIER070131D10DIODE RECT

39、IFIER070131D11DIODE RECTIFIER070131D12DIODE RECTIFIER0701312827PARTS LIST contD13DIODE SILICON070047D14DIODE SILICON070047D15DIODE RECTIFIER070131D16DIODE ZENER 6.2V 5% 500MW070085D17DIODE SILICON070047D18DIODE SILICON070047D19DIODE SILICON070047D20DIODE ZENER 30V 1/2W 5%070161D21DIODE SILICON070047

40、D22DIODE FAST RECOVER070156D23DIODE FAST RECOVER070156D24DIODE FAST RECOVER070156D25DIODE FAST RECOVER070156D26DIODE FAST RECOVER070156D27DIODE FAST RECOVER070156D28DIODE FAST RECOVER070156D29DIODE FAST RECOVER070156D30DIODE FAST RECOVER070156D31DIODE FAST RECOVER070156D32DIODE FAST RECOVER070156D33

41、DIODE FAST RECOVER070156D34DIODE FAST RECOVER070156D35DIODE FAST RECOVER070156D36DIODE FAST RECOVER070156D37DIODE FAST RECOVER070156D38DIODE FAST RECOVER070156D39DIODE FAST RECOVER070156D40DIODE SILICON070047D41DIODE SILICON070047F10.5A 5x20 fuse IEC089092FN1FILTER EMI180057FN2FILTER EMI180057FN3FIL

42、TER EMI180057FN4FILTER EMI180057FN5FILTER EMI180057HS2HEATSINK TO-220080017HS3HEATSINK TO-220080017HS4HEATSINK TO-220080017HS5HEATSINK TO-220080017J1XLR FEMALE HORIZ PCB WITH LATCH 117814J2JACK RCA ORANGE WITH GOLD117798J3JACK RCA ORANGE WITH GOLD117798J4JACK RCA ORANGE WITH GOLD117798J56 PIN HEADER

43、117828J6CONN 23 PIN FFC117715J7BLADE FASTON W/FEET117708J8BLADE FASTON W/FEET117708J9CONN PCB MOUNT POWER RED117719J10CONN PCB MOUNT POWER RED117719J11CONN PCB MOUNT POWER RED117719J12CONN PCB MOUNT POWER RED117719J13CONN 12 PIN FFC117720J14HEADER 8 PIN MTA-156117717J15JACK HEADPHONE STEREO 1/8IN117

44、759J16JACK HEADPHONE STEREO 1/8IN117759J17JACK HEADPHONE STEREO 1/8IN117759J18JACK HEADPHONE STEREO 1/8IN117759J1910 PIN HEADER117829J20RECEPTACLE XLR MALE117686J21JACK PHONO DUAL WHT/RED117692J22RECEPTACLE XLR MALE117686K1RELAY REED FORM 1C 5V 125 OHM087056K2RELAY REED FORM 1C 5V 125 OHM087056K3REL

45、AY REED FORM 1C 5V 125 OHM087056K4RELAY REED FORM 1C 5V 125 OHM087056K5RELAY REED FORM 1A 5V 500 OHMS087050K6RELAY REED FORM 1A 5V 500 OHMS087050K7RELAY REED FORM 1A 5V 500 OHMS087050K8RELAY REED FORM 1A 5V 500 OHMS087050K9RELAY REED FORM 1A 5V 500 OHMS087050K10RELAY REED FORM 1A 5V 500 OHMS087050K1

46、1RELAY REED FORM 1A 5V 500 OHMS087050L1CHOKE 18uH 5%-10%122224L2CHOKE 18uH 5%-10%122224L3CHOKE 18uH 5%-10%122224L4BEADS FERRITE LEADED076019L5BEADS FERRITE LEADED076019L6BEADS FERRITE LEADED076019L7CHOKE 100UH122312L8CHOKE 18uH 5%-10%122224L9CHOKE 18uH 5%-10%122224L10CHOKE 18uH 5%-10%122224L11CHOKE

47、18uH 5%-10%122224L12BEADS FERRITE LEADED076019OPT1Fiber Optic Receiver058156OPT2Fiber Optic Receiver058156OPT3Fiber Optic Receiver058156Q1TRANSISTOR PNP SILICON132172Q2TRANSISTOR PNP132224Q3TRANSISTOR NPN SILICON132171Q4COUPLER OPTICAL SCHMITT OUTPUT131023Q5TRANSISTOR PNP SILICON132172Q6TRANSISTOR N

48、PN132268Q7TRANSISTOR PNP132267Q8TRANSISTOR NPN132268Q9TRANSISTOR PNP132267Q10TRANSISTOR NPN132268Q11TRANSISTOR PNP132267Q12TRANSISTOR NPN132268Q13TRANSISTOR PNP132267Q14TRANSISTOR NPN132268Q15TRANSISTOR PNP132267Q16TRANSISTOR NPN132268Q17TRANSISTOR PNP132267R1RES MF 75 OHM 1% 1/4W144444R2RES MF 110

49、OHM 1% 1/4W144489R3RES MF 75 OHM 1% 1/4W144444R4RES MF 47.5K 1% 1/4W144108R5RES MF 47.5K 1% 1/4W144108R6RES MF 75 OHM 1% 1/4W144444R7RES MF 2.87K 1% 1/4W144142R8RES MF 47.5K 1% 1/4W144108R9RES MF 221 OHM 1% 1/4W144172R10RES MF 47.5K 1% 1/4W144108R11RES MF 221 OHM 1% 1/4W144172R12RES MF 221 OHM 1% 1/

50、4W144172R13RES MF 221 OHM 1% 1/4W144172R14RES MF 221 OHM 1% 1/4W144172R15RES NETWORK 9X-1-223144238R16RES MF 221 OHM 1% 1/4W144172R17RES MF 221 OHM 1% 1/4W144172R18RES MF 221 OHM 1% 1/4W144172R19RES MF 221 OHM 1% 1/4W144172R20RES MF 221 OHM 1% 1/4W144172R21RES MF 332 OHM 1% 1/4W144446R22RES MF 221 O