Integra-DPC7_4-cd-sm 维修电路原理图.pdf

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1、DPC-7.4SERVICE MANUALSERVICE MANUALDVD CHANGERBlack modelMODEL DPC-7.4120V AC, 60Hz230-240V AC, 50HzBMDDBMPARef. No. 3765Aug, 2003RC-543DVSAFETY-RELATED COMPONENT WARNING!COMPONENTS IDENTIFIED BY MARK ON THESCHEMATIC DIAGRAM AND IN THE PARTS LIST ARECRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.REPLA

2、CE THESE COMPONENTS WITH ONKYOPARTS WHOSE PART NUMBERS APPEAR AS SHOWNIN THIS MANUAL.MAKE LEAKAGE-CURRENT OR RESISTANCEMEASUREMENTS TO DETERMINE THAT EXPOSEDPARTS ARE ACCEPTABLY INSULATED FROM THESUPPLY CIRCUIT BEFORE RETURNING THEAPPLIANCE TO THE CUSTOMERRadioFans.CN 收音机爱 好者资料库DPC-7.4Specifications

3、 and features subject to change without notice.Video systemStandard NTSC (U.S. model), PAL/AUTO (Australian model)Region code1 (U.S. model), 4 (Australian model)LaserSemiconductor laser, wavelength 650 nm (DVD), 780 nm (CD)Frequency responseDVD linear audio4 Hz - 22 kHz 48 kHz sampling rate4 Hz - 44

4、 kHz 96 kHz sampling rateCD audio4 Hz - 20 kHzSignal-to-noise ratio (digital audio)100 dBAudio dynamic range (digital audio)93 dBHarmonic distortion (digital audio)0.006%Wow and flutterBelow measurable level (0.001% (W. PEAK) or lessOperating conditionsTemperature5 to 35 C (41 F to 95 F)Installation

5、Install horizontallyVideo outputsCOMPONENT VIDEOY: 1.0 V (p-p), 75 ohm, negative sync, RCA/phono x1, BNC x1PB/PR: 0.7 V (p-p), 75 ohmS VIDEO (S-Video)Y: 1.0 V (p-p), 75 ohm, negative sync, 4-pin mini DIN x2C: 0.286 V (p-p), 75 ohm VIDEO (composite video)1.0 V (p-p), 75 ohm, negative sync, RCA/phono

6、x2Audio outputsOPTICAL-22.5 dBm, optical connector x1COAXIAL0.5 V (p-p), 75 ohm, RCA/phono x1ANALOG2.0 V rms, 440 ohm, RCA/phono x2GeneralPower supply120 V AC, 60 Hz (U.S. model)230-240 V AC, 50 Hz (Australian model)Power consumption13 WPower consumption in Standby mode1.6 W (U.S. model)2.0 W (Austr

7、alian model)Weight6.4 kg (14.1 lbs.)Dimensions (W x H x D)435 x 131 x 436 mm (17-1/8 x 5-3/16 x 17-3/16)SPECIFICATIONRadioFans.CN 收音机爱 好者资料库DPC-7.4SERVICE PROCEDURES-1 PROTECTION OF EYES FROM LASER BEAM DURING SERVICINGThis set employs a laser. Therefore, be sure to follow carefully the instructions

8、 below when servicing.WARNING!SERVICE WARNING : DO NOT APPROACH THELASER EXIT WITH THE EYE TOO CLOSELY.IN CASE IT IS NECESSARY TO CONFIRM LASERBEAM EMISSION, BE SURE TO OBSERVE FROMA DISTANCE OF MORE THAN 30cm FROM THESURFACE OF THE OBJECTIVE LENS ON THEOPTICAL PICKUP BLOCK.Laser Diode PropertiesLAS

9、ER WARNINGWavelength: 650/780nm (DVD/CD)WARNING:TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.CAUTION:TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL

10、.The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated dangerous voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.The exclamation point within

11、an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.WARNINGRISK OF ELECTRIC SHOCKDO NOT OPENRISQUE DE CHOC ELECTRIQUENE PAS OUVRIRAVISWARNINGThis unit contains a semiconduct

12、or laser system and is classifiedas a CLASS 1 LASER PRODUCT. So, to use this modelproperly, read this Instruction Manual carefully. In case of anytrouble, please contact the store where you purchased the unit.To prevent being exposed to the laser beam, do not try to openthe enclosure.VISIBLE LASER R

13、ADIATION WHEN OPEN AND INTERLOCKFAILED OR DEFEATED. DO NOT STARE INTO BEAM.THIS PRODUCT UTILIZES A LASER. USE OF CONTROLS ORADJUSTMENTS OR PERFORMANCE OF PROCEDURESOTHER THAN THOSE SPECIFIED HEREIN MAY RESULT INHAZARDOUS RADIATION EXPOSURE.The label on the rightis applied on the rearpanel except for

14、 USAand Canadianmodels.1. This unit is a CLASS 1 LASER PRODUCT and employs alaser inside the cabinet.2. To prevent the laser from being exposed, do not removethe cover. Refer servicing to qualified personnel.CLASS 1 LASER PRODUCTCAUTION:CAUTION:SERVICE PROCEDURE1. Replacing the fusesREF. NO.PART NO.

15、DESCRIPTION This symbol located near the fuse indicates that thefuse used is show operating type, For continued protection againstfire hazard, replace with same type fuse , For fuse rating, refer to the marking adjest to the symbol. Ce symbole indique que le fusible utilise est e lent. Pour une prot

16、ection permanente, nutiliser que des fusibles de meme type. Ce demier est indique la qu le present symbol est apposre.F001252185 or1.6A-UL/T-2372522521.6A-T/UL-ST2 LASER BEAM CAUTION LABEL252075 or2522752.5A-SE-EAK2.5A-SE-TL250VNorth American areaAustralian areaFDPC-7.4SERVICE PROCEDURES-2Factory-sh

17、ipped conditionInsert the power cord the AC inlet on the rear panelPush button ON (Mechanical SW)Press the STOP and STANDBY same time with NO DISC condition. Push button STANDBY.Pull out the power cord.Push the power switch. (Mechanical switch)INITIALIZING2. Safety-check out(Only U.S.A. model)After

18、correcting the original service problem perform thefollowing safety check before releasing the set to the customerConnect the insulating-resistance tester between the plug ofpower supply cord and terminal GND on the back panel.Specifications: More than 10M ohm at 500VREMOVE THE SOLDER OF LASER DIODE

19、 SHORTWhen replace the mechanism or DVD main PC board.Shorting the solder of Short-circuit land. (2 positions)DPC-7.4EXPLODED VIEW325641A6A30A31A32A33A6A6A6A43A6A41A41A42A42A42A42A50A53A54A54A56A214A54A54A54A54A54A54E101F001U1U2E821A6A34M01M02M06M04M07M08M09M10M11M11M11M12M13M14M14M15M15P1101M11M11M

20、11P1001M17M18M19M50M32M35M36U8A6U9U12P707U3P2501P2901P2401P2001A54Cloth tape(160)Cloth tape(80)M11A6M51A32M52M51badA6M25A1A3A6A6A6A6A6A52A54A54A55A218A220A6A6A221A226A54A54A54A6A6A6A6A6A6A6A6A6A6A6A6U4U5U6U10U11U13U14U15U30Cloth tapeA6M23M30M31(Bracket + Shaft)A43A43A43cbadefA231A232ggehhceA233A6A6A

21、6A6A41A42A42A43A43A43M38M38M38M39Cloth tape(80)P702DPC-7.4A2A4A5A223ADPC-7.4BLOCK DIAGRAMP 9 0 1OPT_OUTCOAXAL_OUTCVSPRCOMPONENTPBYQROULETTE SENSORQ716DISC SENSOERZZX8015MHZX 7 0 14 . 5 M H ZMD,MC,CSDACD,DACRSTP2001ADIG OUTLASER etcSPD+,SPD-,SLD+,SLD,LMT-SWP1001P1101DVD MECHAEV5V,SW5V,SW3.3V,A+12V,A-

22、12VCR/R,CB/B,CY/GSY,SC,LETTERSQEZ,P/IX,AR2/AR1XP 2 4 0 1 ARGBONEV5VDSPSI,DSPSODSPCK,DSTBXSW8VSW5VSW3.3VP2501P 7 1 0 AP2901DISPLAY PC BOARD NADIS-7808MECHANISM CONTROL PC BOARD NADG-7809P704AREMOTE CONTROL SENSORFL TUBE HNV-12SM34RPM7138Q808MPD780232GC-070-8BTQ801MPD780053GC-141-8BTP403AP701BVIDEO SI

23、GNAL OUT PC BOARD NAVD-7810DIGTAL OUT DRIVETC74VHCU04TQ411VIDEO AMPLA73054Q201EV5V,SW5V,SW3.3V,A+12V,A-12VEV5V,-30V,F1,F2EV5V,SW5VRESET ICS-80130Q702SENSERPOSITIONQ717,Q711,Q708DISC SENSERQ706,Q710,Q709Q705,Q707Q704,Q706DRIVELOADING MOTORDRIVEROULETTE MOTORSUBRST,SUBCL,SUBREQ,SUBSI,SUBSOQ701Q110:DTC

24、114YKAQ109:DTA114YKAQ407,Q408:HN1C03FMUTINGQ407,Q408Q109,Q110Q403-Q406:NJM4580M-DAUDIO SIGNAL OUT PC BOARD NAAF-7811AUDIO OUTRchLchVLSCQ404(2/2)Q406Q405FILTER CCTQ404(1/2)Q403(1/2)AUDIO DACPCM1742KEQ401Q403(2/2)NGPS-0037( AUS)NGPS-0036 (US)DVD MAIN CIRCUIT PC BOARDNADG-7807P702BRI,RESET,AMUTEF2F1-30

25、VA-12VA+12VSW8VSW3.3VSW5VEV5VPOWER SUPPLY UNITLEDKEY INPUTVIDEO OFF,RXD1,TXD1DACCLK,LRCLK,BCLK,DATAD,DOUT0-1COMPONENT VIDEO OUTNAETC-DPC-7.4SCHEMATIC DIAGRAM-2U1 : DVD MAIN CIRCUIT PC BOARD-2 (B/E SECTION) NADG-7807A12345BCDEFGHD2901D_LEDP2701Q2904MPC29M33TGIOQ2903MPC2918TGIOQ2901MPC29M33TGIOQ2902MP

26、C2918TGIOP2501AQ2001M65783AFPACLKI 32AGND18_0107AGND33_0116AGND33_2128ALE171AO0 26AO1 23AO2 22AOD 21AVDD18_0105AVDD33_0112AVDD33_1115AVDD33_2119AVDD33_3124AVDD33_4127AVDD33_5131AVRI114AVRIO126BCLK 45BD054BD153BD2 51BD3 50BD4 49BD5 48BD6 47BD7 46BDEN 44BDREQ 41BIAS01132BIAS02130BIAS1120BIAS2118BSECH5

27、5BSEL0 169CAS78CDBCK 34CDDATA 31CDDIN 36CDLRCK 35CDMCK 37CLKIN106CLKO108DACCLK 20DAOUTB110DCS73DCS276DOCLK 28DOUT0 30DOUT1 29DOUTOB122DQML83DQMU82DWE80GND_0 16GND_1 33GND_10 189GND_11 208GND_2 52GND_367GND_481GND_596GND_6109GND_7134GND_8152GND_9 170HA11 194HA12 193HA13 192HA14 191HAD0 190HAD1 188HAD

28、10 177HAD11 176HAD12 175HAD13 174HAD14 173HAD15 172HAD2 187HAD3 186HAD4 185HAD5 184HAD6 183HAD7 182HAD8 181HAD9 178IREF113IREFO125LRCLK 27MA064MA162MA1066MA1172MA258MA356MA457MA561MA663MA765MA868MA970MBA071MBA169MCLK79MD0101MD199MD1091MD1193MD1295MD1398MD14100MD15102MD297MD394MD492MD590MD686MD784MD8

29、85MD987NC1 195NC2 204NC3 205NC4 206PA0111PA00123PA01129PA02133PA1117PA2121PIO00/SIN0 10PIO01/SOUT09PIO02/SCLK06PIO03/SRDY05PIO04/SIN14PIO05/SOUT13PIO06/SCLK12PIO07/SRDY11PIO10SIN2 19PIO11/SOUT2 18PIO12/SCLK2 17PIO13/SRDY2 15PIO14/RXD 14PIO15/TXD 13PIO16CTS 12PIO17/RTS 11PIO20/INTM0150PIO21/INTM1151P

30、IO22/INTM2/TMO0153PIO23/TMO1154PIO24BSEL3/TMO2155PIO25/BSEL2156PIO26/BSEL1 157PIO27/HA10158PIO30/EXWIT145PIO31/ADBCK 40PIO32/ADLRCK 39PIO33/ADDIN 38PIO34/ADMCK/SDITRSYNC146PIO35/PXCLK/SDITRCLK147PIO36/HSYNC/SDIEVENT0148PIO37/VSYNC/SDIEVENT1149PIO40/PD0/SDITRDATA0135PIO41/PD1/SDITRDATA1136PIO42/PD2/S

31、DITRDATA2137PIO43/PD3/SDITRDATA3138PIO44/PD4/SDITRDATA4139PIO45/PD5/SDITRDATA5140PIO46/PD6/SDITRDATA6141PIO47/PD7/SDITRDATA7144RAS77RESET 207RS168SDIDBI 159SDITCK 160SDITDI 163SDITDO 164SDITMS 165SDITRST 166TEST0 203TEST1 202TEST2 201TEST3 200TEST4 197TEST5 196VDD18_07VDD18_1 24VDD18_10 198VDD18_2 4

32、2VDD18_359VDD18_474VDD18_588VDD18_6103VDD18_7142VDD18_8 161VDD18_9 179VDD33_08VDD33_1 25VDD33_10 199VDD33_2 43VDD33_360VDD33_475VDD33_589VDD33_6104VDD33_7143VDD33_8 162VDD33_9 180WS167Q2303IS42S16400-7TA0 23A1 24A10/AP 22A1135A2 25A3 26A429A530A631A732A833A934BA0 20BA1 21CKE37CLK38DQ02DQ14DQ1045DQ11

33、47DQ1248DQ1350DQ1451DQ1553DQ25DQ37DQ48DQ5 10DQ6 11DQ7 13DQ842DQ944LDQM 15NC036NC140UDQM39VDD01VDD1 14VDD2 27VDDQ03VDDQ19VDDQ243VDDQ349VSS028VSS141VSS254VSSQ06VSSQ1 12VSSQ246VSSQ352CAS 17CS 19RAS 18WE 16Q2302MX29LV160ABTC-90A025A124A106A115A124A133A142A151A1648A1717A1816A199A223A2010A322A421A520A619A

34、718A88A97DQ029DQ131DQ1034DQ1136DQ1239DQ1341DQ1443DQ233DQ335DQ438DQ540DQ642DQ744DQ830DQ932NC213QD15/A-145VCC37VSS027VSS146BY/RY15BYTE47CE26OE28RESET12WE11WP/ACC14Q2002S-80127CNMC-JKM-T2DS1NC3VDD 5VOUT 4VSS2Q2401NJM2373AFANOD 2CATH5NC0 1NC1 3REF4Q2301TC74VCX162373FT1D1471D2461D3441D4431D5411D6401D7381

35、D8371LE481Q121Q231Q351Q461Q581Q691Q7111Q8122D1362D2352D3332D4322D5302D6292D7272D8262LE252Q1132Q2142Q3162Q4172Q5192Q6202Q7222Q823GND_04GND_110GND_215GND_321GND_428GND_534GND_639GND_745VCC_07VCC_118VCC_231VCC_3421OE12OE24Q2501TC74VHCT125AFT1A21Y32A52Y63A 93Y 84A 124Y 11GND7VCC 141G12G43G 104G 13Q2502T

36、C7SZ125FU2GND3VCC54G1Q2003IS24C08-3ZA0 1A1 2A2 3NC7SCL6SDA5VCC8VSS 4P2401BQ2601BU2288FVAO19AO210FSEL14MO13MO24NC 16SO113SO215VDD11VDD25VDD312VSS12VSS26VSS311XTI7XTO8P2001BP2702P2002BC2419105ZC2002105ZC2001105ZC2003105ZC2004105ZC2006105ZC2005105ZC2007105ZC2008105ZC2009105ZC2010105ZC2011105ZC2012105ZC

37、2013105ZC2014105ZC2015105ZC2016105ZC2017105ZC2018105ZC2020105ZC2021105ZC2022105ZC2023105ZC2402105ZC2404C2416102JC2024101JC2028105ZC2417102JC2309105ZC2310105ZC2311105ZC2312105ZC2315105ZC2314105ZC2313105ZC2317105ZC2318105ZC2501104ZC2502104ZC2304104ZC2303104ZC2301104ZC2302104ZC2306105ZC2308105ZC2305101

38、JC2025104ZC2606120JC2608120JC2609C2607C2604105ZC2603105ZC2605105ZC2406105ZC2408105ZC2411105ZC2413105ZC2410105ZC2414105ZC2412105ZC2409105ZC2407105ZC2405105ZC2019105ZC2029105ZC2403100/6.3C2418100/6.3C2401100/6.3C241510/16C231610/16C2307100/6.3C2602100/6.3C260122/6.3C2027100/6.3C2026100/6.3C2905100/6.3

39、C2903100/6.3C2902100/6.3C2901100/6.3C2904100/6.3C2906100/6.3R2906R2905R203347R2304R2303R230210KR23011KR2433R2432R24310R205510KR205710KR205610KR20540R2904R26080R2607R205047R205147R205247R205347R200547R200647R20200R202110R204310KR240122R2402220R201910KR201822R201722R201622R201522R2014R2013R2012R201122

40、R201022R200947R200847R200747R200447R200347R200247R200147R20292.2KR20282.2KR203110R203010R20270R20260R240510R2416 1.5KFR2415 270 FR24221.5KFR2421 270 FR24191.5K FR2418 270 FR24281.5KFR2427 270 FR2425 1.5KFR2424 270 FR24141.2KR24171.2KR24201.2KR24231.2KR24261.2KR25010R250222R250322R250422R250522R20441

41、KR202447R203247R20454.7KR203447R203610KR2601560R2602R2606R2605R2604R2603100R24030R2404R24290R24300R29010R29020R29030R203710KR24083.3K FR2409R24123.3K FR2413R2406270 FR2407270 FR2410270 FR2411270 FR2046R2047R2048R20490Q24022SA1774Q24042SA1774Q24032SA1774Q24062SA1774Q24052SA1774L24042.2UL24052.2UL2401

42、2.2UL23022.2UL23012.2UL2602BLM21P221SGL2604L2603L2601BLM21P221SGL20022.2UL20012.2UL29032.2UL29022.2UL29012.2UP152INTM1P1464AP1474YP157BY/RDP2901AR204215*412345678R202547*412345678R203815*412345678R204015*412345678R203915*412345678R204115*412345678R202347*412345678R202247*412345678R203547*412345678X2

43、601FCX-03-27MHZAGNDA3.3VDGNDD3.3VAGNDLRCLKCSDACSURCSDACCSWCSDACLRDAT-CSWDAT-SLSRDIGOUT0DIGOUT1BITCLKDAT-DMIXDACCLKCSDMIXMDMCAMUTEDACRSTA1.8VDAT-LRDGNDDRVIRQD1.8VDRVRDYA5VDRVCLKDRVRXPGNDDRVTXP8VDRVRSTDOUTBCKP8VLRCKPGNDDADTSW+5VDGNDSW+3.3VLRCLKCSDACSURCSDACCSWCSDACLRDADTLRCKBCKACLKIDOUTDIGOUT0DIGOUT1B

44、ITCLKDAT-LRDAT-CSWDAT-SLSRDAT-DMIXDACCLKCSDMIXMDMCFSELAMUTEDACRSTDRVRSTDRVTXDRVRXDRVCLKDRVRDYFP_SINFP_SOUTFP_CLKFP_CSDGND1HDRQFP_CLKFP_CSFP_SOUTFP_SINXHACSW+3.3VDCKXSHDVDT0VDT1VDT2VDT3VDT4VDT5VDT6VDT7DCKXHACHDRQSW+1.8VXSHDVDT7BED+3.3VBED+3.3VVDT6BED+1.8VBED+1.8VVDT5VDT4VDT3VDT2VDT1VDT0MC_RSTSW+1.8VS

45、W+3.3VSW+5VE+5VMICONGNDBEMA3DSTBXBEMA4DSPSCKBEMA2DSPSODSPSIBEMA5BEMA1BEMA6BEMA0DGND1MCA14BEMA7ROM3.3VROM3.3VBEMA10MCA15MCA11MC_RSTMCA16BEMA8MCA12MCAD0MCA15MCA17BEMA4BEMA3BEMBA1MCA13MCAD1MCA16MCA18MCAD0BEMA5BEMA2BEMA9MCA14MCA19MCAD8BEMA6BEMA1BEMBA0MCAD2MCA17MCA20MCAD1BEMA7BEMA0BEMA11MCAD0MCAD3MCA18MC

46、A21MCAD9BEMA8BEMA10MCAD1MCA22MCAD2BEMA9BEMBA1MCAD2MCAD4MCA19MCA11MCAD10BEMA11BEMBA0MCAD3MCAD5MCA20MCA10MCAD3BEDCSMCAD4MC_WS0MCAD11BERASMCAD5MCAD6MCA21MC_RSTOTEST4BEMCKABECASMCAD6DRVIRQMC_RSTMCAD7MCA22MCAD4BEDQMUBEDWEMCAD7MCAD8MCA23WPMCAD12BEDQMLMCAD9MCA24MCAD5MCA12MCAD13BEMD8BEMD7MCAD8MCAD10MCA25MCA

47、13MCAD6MCAD9MCAD11MCA26MCA23MCAD14BEMD9BEMD6BEMD7MCAD10MCA24MCAD7BEMD10BEMD5BEMD8MCAD11MCAD12MCA27MCA25MCAD15BEMD6MCAD12MCAD13MCA28MCA26MC_RSBEMD11BEMD4BEMCKABEDQMUFSELACLKIBEMD9MCAD13MCA27BEMD12BEMD3MCAD14MCAD14MCA29MCA28FROMCSMCAD15MCAD15MCA30MCA29BEMD13BEMD2BEMD5ALEBEMD14BEMD1BEMD10MCA30BEMD4FROM

48、CSBEMD15BEMD0BEMD11MC_RSBEMD3MC_WS0DGND1BEMD12SDITRSTMCA10SDRAM_D3SDITMSBEMD2SDITDOBEMD13SDITDIBEMD1SDITCKBEMD14BEMD0BEMD15SDIDBIMCA10DGND1LETTERDGND1SW+3.3VDGND1CRIREFVREFCBBIAS2BIAS1CYS_YIREF0VREFS_CBIAS02BIAS0127MHZAVENC1.8VDRVIRQSQUEEZEAVENC3.3V33.8688MHZVDACGNDSDAPLLA3.3VPLLD3.3VSCLVDACGNDSW+1.

49、8VDGND1SW+3.3VSW+5VDGNDFSELDRVIRQV+5VACLKIDGNDPD0PD1PD2PD4PD5PD6PD7PD8P/IXTRSYNCAPIXCLKHSYNCVSYNCRGBONSDASCLAR2/AR1XMC_RSTSDITRSTSDITMSSDITDOSDITDISDITCKSDIDBIBED+3.3VTEST4SW+1.8VDGND1SW+3.3VP/IXPD0PD1PD2PD4PD5PD6PD7PD8PIXCLKHSYNCVSYNCSDATRSYNCAMC_RSTSDITRSTSDITMSSDITDOSDITDISDITCKSDIDBIBED+3.3VBED+

50、3.3VTEST4CR/RDGNDCB/BDGNDCY/GDGNDSYDGNDSCDGNDLETTERSQUEEZEP/IXAR2/AR1XRGBONSCLDGND1To U4: VIDEO SIGNAL OUTPUT TERMINAL PC BOARD NAVD-7810To Mechanism control PC boardNADG-7809From Mechanism control PC boardNADG-7809To AUDIO OUTPUT TERMINAL PC BOARD NAAF-7811Note: Resistor F-ranking is +/- 1 % errorN