Phonic_MAR2,_MAR4,_MAR6_Power_Amp_Service_Manual 电路图.pdf

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1、 MAR 2/4/6 SERVICE MANUAL RadioFans.CN 收音机爱 好者资料库 contents SAFETY FIRST ! 1 Introduction 2 MAR2 Front-Panel Description 3 Back-Panel Description 4 MAR4 Front-Panel Description 6 Back-Panel Description 7 MAR6 Front-Panel Description 9 Back-Panel Description 10 General Audio Practice 12 Hook-up#1:Home

2、 Studio Reference Amp 15 Hook-up#2:Mobile DJ Stereo PA 15 Hook-up#3:Monitor Amplifier 16 Specifications 17 PC-Board Layout MAR2/4/6-Main Board 18 MAR2/4/6-Power TR CH-1 Board 19 MAR2/4/6-Power TR CH-2 Board 20 MAR2/4/6-Channel VR & Input Board 21 MAR2/4/6-Primary Board 22 MAR2 Block Diagram 23 MAR4/

3、6 Block Diagram 24 MAR2/4/6-Power Amplifier 25 Schematic Diagram 26 Parts-List Schematic Diagram 35 Parts-List MECHANISM 44 RadioFans.CN 收音机爱 好者资料库 1 RadioFans.CN 收音机爱 好者资料库 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 PC-Board Layout MAR2/4/6 MAIN BOARD (PCB-A) 19 PC-Board Layout MAR2/4/6 POWER TR CH

4、-1 BOARD (PCB-B) 20 PC-Board Layout MAR2/4/6 POWER TR CH-2 BOARD (PCB-B) 21 PC-Board Layout MAR2/4/6 POWER TR CH-2 BOARD (PCB-B) 22 PC-Board Layout MAR2/4/6 PRIMARY BOARD (PCB-E) 23 BLOCK DIAGRAM MAR2 Date:September 12, 1996Sheet 1of 1 SizeDocument NumberREV AMAR2BL.SCHA PHONIC Corp. MAR-2 BLOCK DIA

5、GRAM 1 2 3 DETECTOR CLIP LEVEL VOLTAGE AMP. CLIP PL. SHORT CIRCUIT PROTECTION AMP. CURRENT PROT. PL. CH1 OUTPUT + - DC FAUIT THERMAL POWER ON/OFF PROTECTION + - + - CH- 1 GND SW + ONOFF BRIDGE STEREO PARALLEL BRIDGE STEREO PARALLEL CH1 SG PL. PROT. PL. SHORT CIRCUIT CLIP PL. DETECTOR CLIP - G - + PR

6、OTECTION DC FAUIT THERMAL POWER ON/OFF + CH2 OUTPUT - PROTECTION CURRENT AMP. + - VOLTAGE AMP. + - LEVEL 1 2 3 CH- 2 * PL.- - - PILOT LAMP GND SW ONOFF CH2 SG PL. 24 BLOCK DIAGRAM MAR4/6 Date:September 12, 1996Sheet 1of 1 SizeDocument NumberREV AMAR4BL.SCHA PHONIC Corp. MAR- 4/6 BLOCK DIAGRAM 1 2 3

7、CH- 1 LIMITING DETECTOR VOLTAGE LIMITOR- CLIP PL. CURRENT SHORT CIRCUIT PROTECTION CH1 SG PL. + - CH1 OUTPUT DC FAUIT THERMAL PROTECTION POWER ON/OFF + - AMP.AMP. LEVEL ATTENUATING LIMITING ON OFF LIMITER + - ONOFF GND SW + ON OFF PROT. PL. SHORT LIMITOR- CLIP PL. LIMITING BRIDGE STEREO PARALLEL BRI

8、DGE STEREO PARALLEL - G - + CH- 2 DETECTOR CIRCUIT PROTECTION CH2 SG PL. CH2 OUTPUT + - DC FAUIT THERMAL PROTECTION POWER ON/OFF + - CURRENT AMP.AMP. VOLTAGE LEVEL ATTENUATING LIMITING + - 1 2 3 ONOFF GND SW PROT. PL. 25 Schematic Diagram 1 MAR2/4/6POWER AMPLIFIER 26 Schematic Diagram 2 MAR2/4/6 MAI

9、N BOARD (PCB-A) 27 Schematic Diagram 3 MAR2/4/6 MAIN BOARD (PCB-A) 28 Schematic Diagram 4 MAR2/4/6 MAIN BOARD (PCB-A) 29 Schematic Diagram 5 MAR2/4/6 POWER TR BOARD (PCB-B) 30 Schematic Diagram 6 MAR2/4/6 INPUT BOARD (PCB-C) 31 Schematic Diagram 7 MAR2/4/6 CH-2 VR BOARD (PCB-F) 32 Schematic Diagram

10、8 MAR2/4/6 CH1 VR BOARD (PCB-G,I) 33 Schematic Diagram 9 MAR2/4/6 CH-2 VR BOARD (PCB-H,J) 34 Schematic Diagram 10 MAR2/4/6 PRIMARY BOARD (PCB-E) 35 Parts List Schematic Diagram 2 MAR-2/4/6 MAIN BOARD (PCB-A) Ref. PHONIC Part # Description BD102A, BD102B 090-10000-000-0 SEMI, DIODE, BRIDGE, PB154 C10

11、1A, C101B, C102A, C102B, C103A, C103B 042-680A4-050-0 CAP, CERAMIC, TYPE2, 50V, 68pF, 5% C104A, C104B 042-390A4-050-0 CAP, CERAMIC, TYPE2, 250V, 39pF, 5% C105A 032-47688-0A0-0CAP, ELEC, NP, 85C, 100V, 47F, +80%, -20% C108A, C108B, C132A, C132B 032-47626-0A0-0CAP, ELEC, NP, 85C, 16V, 47F, 20% C110A,

12、C110B, C130A, C130B042-10124-050-0CAP, CERAMIC, TYPE2, 50V, 100pF, 5% C111AM, C111BM 030-47628-0A0-0CAP, ELEC, 85C, 16V, 47F, +80%, -20% C118A, C118B 046-10224-000-0CAP, MYLAR, 250V, 0.001F, 5% C122A, C122B, C131A, C131B 032-10636-0A0-0CAP, ELEC, NP, 85C, 25V, 10F, 20% C127A, C127B032-22586-0A0-0CAP

13、, ELEC, NP, 85C, 100V, 2.2F, 20% C128A, C128B 030-10626-0A0-0CAP, ELEC, 85C, 16V, 10F, 20% C129A, C129B 032-22736-0A0-0CAP, ELEC, NP, 85C, 25V, 200F, 20% C133A, C133B 042-39024-050-0 CAP, CERAMIC, TYPE2, 50V, 39pF, 5% CP1AM, CP1BM (MAR4/6 USE) 010-00001-010-0 RES, CDS, P873-G35-552 D118A, D118B 090-

14、02000-020-0 SEMI, DIODE, DETECTOR, 1N4148 IC1A, IC1B160-00001-400-0IC, NJM353D JRC IC2A, IC2B 160-00001-000-0 IC, M5218 JK101A 211-10091-130-0 CONN, 1/4, WAFER, SOCKET, 9-PIN JK101B 211-10101-080-0 CONN, 1/4, WAFER, SOCKET, 10-PIN, 2532-10 JK103 211-10081-060-0 CONN, 1/4, WAFER, SOCKET, 8-PIN, 2532-

15、08 Q121A, Q121B 121-00000-200-0 SEMI, TRANSISTOR, PNP, 2SA1015, GR R101A, R101B, R104A, R104B 006-22022-400-0 RES, MF, 1/4W, 22K, 1% R102A, R102B, R105A, R105B 006-16222-400-0 RES, MF, 1/4W, 16.2K, 1% R103A, R103B, R107A, R107B, R112A,000-10126-400-0RES, CF, 1/4W, 100, 5% R106A, R172B, R164A, R164B

16、000-33226-400-0 RES, CF, 1/4W, 3.3K, 5% R108A, R108B 000-56326-400-0 RES, CF, 1/4W, 56K, 5% R109B 000-15326-400-0 RES, CF, 1/4W, 15K, 5% R110A, R110B 006-43002-400-0 RES, MF, 1/4W, 430, 1% R110A, R110B (MAR4 USE) 006-29402-400-0 RES, MF, 1/4W, 294, 1% R110A, R110B (MAR6 USE)006-24302-400-0RES, MF, 1

17、/4W, 243, 1% R111A, R111B 006-15022-400-0 RES, MF, 1/4W, 15K, 1% R113A 000-22326-400-0 RES, CF, 1/4W, 22K, 5% R114A, R114B000-10426-400-0RES, CF, 1/4W, 100K, 5% R117AM, R117BM 000-56026-400-0 RES, CF, 1/4W, 56, 5% R121AM, R121BM, R122AM, R122BM 000-11326-400-0 RES, CF, 1/4W, 11K, 5% R123AM, R123BM,

18、R124A, R124B R125A, R125B000-75026-400-0RES, CF, 1/4W, 75, 5% R156A, R156B 000-22226-400-0 RES, CF, 1/4W, 2.2K, 5% R165A, R165B 000-12326-400-0 RES, CF, 1/4W, 10K, 5% R167A, R167B, R119AM, R119BM, R120AM, R120BM 000-10326-400-0 RES, CF, 1/4W, 10K, 5% R172A, R106B 000-10226-400-0 RES, CF, 1/4W, 1K, 5

19、% SW101, SW103 210-01203-050-0 SW, SLIDE, SSFZ22-07 SW102 (MAR4/6 USE)210-01203-050-0SW, SLIDE, SSFZ22-07 36 Parts List Schematic Diagram 3 MAR2/4/6 MAIN BOARD (PCB-A) Ref. PHONIC Part # Description C109A, C109B 046-22304-003-0CAP, MYLAR, 50V, 0.022F, 5% C112A, C112B, C113A, C113B 046-10304-060-0CAP

20、, MYLAR, 50V, 0.01F, 5% C116A, C116B, C117A, C117B046-33204-060-0CAP, MYLAR, 50V, 0.0033F, 5% C119A, C119B, C134A, C134B 046-68325-000-0CAP, MYLAR, 250V, 0.068F, 10% C120A, C120B, C121A, C121B (MAR4 USE) 030-48888-030-0CAP, ELEC, 85C, 100V, 4700F, +80%, -20% C120A, C120B, C121A, C121B, (MAR2 USE) 03

21、0-13387-000-0CAP, ELEC, 85C, 80V, 3300F, +80%, -20% C120A, C120AM6, C120B, C120BM6,030-10968-001-0CAP, ELEC, 85C, 63V, 10000F, +80%, -20% C120A, C120AM6, C120B, C120BM6, 030-10968-001-0CAP, ELEC, 85C, 63V, 10000F, +80%, -20% C121A, C121AM6, C121B, C121BM6 (MAR6 USE) C123A, C123B 032-47626-0A0-0CAP,

22、ELEC, NP, 85C, 16V, 47F, 20% C124A, C124B 030-10738-0A0-0CAP, ELEC, 85C, 25V, 100F, +80%, -20% D101A, D101B, D102A, D102B090-02003-020-0SEMI, DIODE, DETECTOR, 1N4934 D103A, D103B, D104A, D104B, D109A, D109B, D110A, D110B 090-02003-020-0 SEMI, DIODE, DETECTOR, 1N4934 D105A-D108A, D105B-D108B, D114A,

23、D114B, D116A, D116B 090-02000-020-0 SEMI, DIODE, DETECTOR, 1N4148 D113A, D113B, D115A, D115B 090-00007-020-0 SEMI, DIODE, RECT, 400V, 1A, 1N4004 JK107A, JK107B 211-10114-000-0 CONN, 1/4, WAFER, SOCKET, 11-PIN, 396111 JK108A, JK108B 121-10084-020-0 CONN, 1/4, WAFER, SOCKET, 8-PIN L101A, L101B075-2008

24、2-000-0INDUCTOR, 2.4uH, 10%, 1.7mm M24A1-M24A4, M24B1-M24B4 (MAR2/4 USE0382-20010-010-0TINNER, WIRE, 10mm, D0.6 NTC1A, NTC1B 011-450A0-000-0 RES, THERMAL, TDC05A045L Q102A, Q102B, Q116A, Q116B, Q118A, Q118B, Q119A, Q119B 120-00000-800-0 SEMI, TRANSISTOR, NPN, 2SC1815, GR Q103A, Q103B, Q117A, Q117B,

25、Q120A, Q120B 121-00000-200-0 SEMI, TRANSISTOR, PNP, 2SA1015, GR Q104A, Q104B120-00008-000-0SEMI, TRANSISTOR, NPN, 2SC 2336-BQ Q104A, Q104B, Q105A, Q105B 313-00000-060-0 WASHER, RUBBER, TO-2203 Q104A, Q104B, Q105A, Q105B 314-00000-050-0 BUSHES, 602S(V.0) Q105A, Q105B 121-00005-700-0 SEMI, TRANSISTOR,

26、 PNP, 2SA 1006-BQ R115A, R115B, R116A, R116B 000-82126-400-0 RES, CF, 1/4W, 820, 5% R126A, R126B, R127A, R127B 000-51226-400-0 RES, CF, 1/4W, 5.1K, 5% R128A, R128B, R129A, R129B000-22226-400-0RES, CF, 1/4W, 2.2K, 5% R130A, R130B, R131A, R131B 000-10126-400-0 RES, CF, 1/4W, 100, 5% R132A, R132B, R133

27、A, R133B (MAR2/4 USE) 000-51226-400-0 RES, CF, 1/4W, 5.1K, 5% R132A, R132B, R133A, R133B (MAR6 USE) 000-43226-400-0 RES, CF, 1/4W, 4.3K, 5% R134A, R134B, R135A, R135B 000-12226-400-0 RES, CF, 1/4W, 1.2K, 5% R136A, R136B000-68236-400-0RES, CF, 1/2W, 6.8K, 5% R137A, R137B, R138A, R138B 006-68084-400-0

28、 RES, MF, 1W, 6.8K, 5% R151A, R151B 006-56085-400-0 RES, MF, 2W, 5.6K, 5% R152A, R152B 006-22075-440-0 RES, MF, 1/16W, 2.2K, 5% R153A, R153B 000-15326-400-0 RES, CF, 1/4W, 15K, 5% R154A, R154B 000-33226-400-0 RES, CF, 1/4W, 3.3K, 5% R155A, R155B000-33326-400-0RES, CF, 1/4W, 33K, 5% R157A, R157B 000-

29、10326-400-0 RES, CF, 1/4W, 10K, 5% R158A, R158B, R161A, R161B 000-22326-400-0 RES, CF, 1/4W, 22K, 5% R159A, R159B, R160A, R160B, R163A, R163B 000-27226-400-0 RES, CF, 1/4W, 2.7K, 5% R162A, R162B 000-10426-400-0 RES, CF, 1/4W, 100K, 5% R175A, R175B (MAR2/4 USE) 003-18023-600-0 RES, CEMENT, 5W, 18K, 5

30、%, R175A, R175B (MAR6 USE) 003-27023-600-0 RES, CEMENT, 5W, 27K, 5%, RY101A, RY101B 076-02421-000-0 RELAY, JC2AF-DC24V SVR1A, SVR1B000-56026-400-0RES, CF, 1/4W, 56, 5% ZD103A, ZD130B, ZD104A, ZD104B090-01472-020-0SEMI, DIODE, ZENER, 4.7V, 0.5W, 5% ZD106A-ZD110A, ZD106B-ZD110B 090-01622-000-0 SEMI, D

31、IODE, ZENER, 6.2V, 0.5W, 10% 37 Parts List Schematic Diagram 4 MAR2/4/6 MAIN BOARD (PCB-A) Ref. PHONIC Part # Description BD101 090-10000-000-0 SEMI, DIODE, BRIDGE, PB154 C106A, C106B, C107A, C107B 030-10738-0A0-0CAP, ELEC, 85C, 25V, 100F, +80%, -20% C125,C126 030-47748-000-0CAP, ELEC, 85C,35V, 470F

32、, +80%, -20% C180, C190 030-47658-0A0-0CAP, ELEC, 85C, 50V, 47F, +80%, -20% F101*2, F102*2 281-00000-020-0 FUSE, CLIP, FH-1206 IC1A, IC1B160-00001-400-0IC, NJM353D JRC IC2A, IC2B 160-00001-000-0 IC, M5218 JK104 (MAR4/6 USE) 211-10021-150-0 CONN, 1/4, WAFER, SOCKET, 2-PIN, 5267-02A JK105 211-10034-02

33、1-0 CONN, 1/4, WAFER, SOCKET, 3-PIN, 8673-03 JK106 211-10021-150-0 CONN, 1/4, WAFER, SOCKET, 2-PIN, 5267-02A Q130160-00005-000-0IC, UA7815, FAIRCHILD Q131 160-00002-900-0 IC, UA7915, FAIRCHILD Q180 120-00000-800-0 SEMI, TRANSISTOR, NPN, 2SC1815, GR Q190 121-00000-200-0 SEMI, TRANSISTOR, PNP, 2SA1015

34、, GR R180 (MAR4/6 USE) 005-22126-400-0 RES, MDF, 2W, 220, 5% R181, R191000-10326-400-0RES, CF, 1/4W, 10K, 5% R182, R192 000-10426-400-0 RES, CF, 1/4W, 100K, 5% R183 (MAR4/6 USE) 005-33016-400-0 RES, MDF, 1W, 33, 5% R190 005-27126-400-0 RES, MDF, 2W, 270, 5% R193 005-33016-400-0 RES, MDF, 1W, 33, 5%

35、Parts List MAR2/4/6 MAIN BOARD (PCB-A) Ref. PHONIC Part # Description MAIN BOARD MAR2F34-00000-001-0MAR2, PCB-A MAIN BOARD MAR4F34-00001-001-0MAR4, PCB-A MAIN BOARD MAR6F34-10000-001-0MAR6, PCB-A G34-00000-001-0MAR2/4/6, PCB-A, MAIN BOARD PCB-A290-34280-101-0PCB, MAR-A 315-00016-000-0GND, LUG, JG-6L

36、 R136A*2-R138A*2, R136B*2-R138B*2, R151A*2/B*2, R152A*2/B*2, R180*2, R190*2, R183*2, R193*2 322-05000-100-0TUBE, 5mm*D1 J*67382-20010-010-0TINNER, WIRE, 10mm, D0.6 J*2382-20012-510-0TINNER, WIRE, 12.5mm, D0.6 526-10050-110-0HEAT SINK, MAR2 TRANS HEATSINK*4590-53006-100-0SCREW, MACHINE, SET, SCR, M3.

37、0*6, NI TRANS IC*6590-53010-100-0SCREW, MACHINE, SET, SCR, M3.0*10, NI TRANS IC*6610-60300-501-0WASHER, PAN, SPR, D3.0*D7.0*0.5, NI TRANS IC*2615-10641-630-0COPPER, RIVET, HEX, L=35, M3, CU TRANS IC*2 (MAR6 USE)615-10053-620-0COPPER, RIVET, HEX, L=17, M3 H34-10002-002-0MAR2/4/6, PCB-A 38 Parts List

38、Schematic Diagram 5 MAR2/4/6 POWER TR BOARD (PCB-B) Ref. PHONIC Part # Description C135A, C135B 042-10386-050-0CAP, CERAMIC, TYPE2, 500V, 0.01F, 20% D111A, D111B, D112A, D112B 090-00016-000-0 SEMI, DIODE, RECT, 1N5404 Q106A-Q110A, Q106B-Q110B (MAR4 USE) 121-00006-000-0 SEMI, TRANSISTOR, PNP, 2SA1302

39、-0, GR Q106A-Q110A, Q106B-Q110B, Q122A, Q122B, Q123A, Q123B (MAR6 USE) 121-00006-000-0 SEMI, TRANSISTOR, PNP, 2SA1553-0, GR Q107A, Q107B, Q109A, Q109B (MAR2 USE)121-00006-000-0SEMI, TRANSISTOR, PNP, 2SA1302-0, GR Q111A-Q115B, Q111B-Q115B (MAR4 USE) 120-00008-600-0 SEMI, TRANSISTOR, NPN, 2SC3281-0 Q1

40、11A-Q115B, Q111B-Q115B, Q124A, Q124B, Q125A, Q125B (MAR6 USE) 120-00008-600-0 SEMI, TRANSISTOR, NPN, 2SC4029-0 Q112A, Q112B, Q114A, Q114B (MAR2 USE) 120-00008-600-0 SEMI, TRANSISTOR, NPN, 2SC3281-0 R139A, R139B, R140A, R140B006-22074-400-0RES, MF, 1W, 22, 5% R141A-R150A, R141B-R150B (MAR4 USE) 003-2

41、2092-602-0 RES, CEMENT,3W, 0.22, 5%, R141A-R150A, R141B-R150B, R168A-R171A, R168B-R171B (MAR6 USE) 003-22092-602-0 RES, CEMENT,3W, 0.22, 5%, R142A, R142B, R144A, R144B, R147A, R147B, R149A, R149B (MAR2 USE) 003-22092-602-0 RES, CEMENT,3W, 0.22, 5%, Parts List MAR2/4/6 POWER TR BOARD (PCB-B) Ref. PHO

42、NIC Part # Description POWER TR BOARD MAR2F34-00000-003-0MAR2, PCB-B POWER TR BOARD MAR4F34-00000-003-1MAR4, PCB-B POWER TR BOARD MAR6F34-00000-003-2MAR6, PCB-B FRONT FAN SW, REAR FAN SW210-10050-020-0SW, THERMAL, US-602SYTFQL, 50/40 CHA-RELAY,CHB-RELAY210-10085-010-0SW, THERMAL, US-602XYTFQL, 85/75

43、 GND*1212-10010-550-0CONN, 1/4, WAFER, PLUG,1-PIN, 170mm CH2 SPEAKER GND212-10010-560-0CONN, 1/4, WAFER, PLUG,1-PIN, 300mm CH1_TR212-10110-090-0CONN, 1/4, WAFER, PLUG,11-PIN, 800mm CH2_TR212-10110-100-0CONN, 1/4, WAFER, PLUG,11-PIN, 350mm PCB-B*2290-34280-210-0PCB, MAR2/4-B PCB-B*2 (MAR6 USE)290-342

44、80-200-0PCB, MAR6-B 321-00000-070-0CABLE, TIE, HW-100mm 322-01000-100-0TUBE, 10mm*D1 382-20010-010-0TINNER, WIRE, 10mm, D0.6 526-10054-110-0HEAT SINK, MAR2 526-10049-110-0HEAT SINK, MAR6 526-10056-110-0HEAT, SINK, LINK LINK HEATSINK*4590-43008-200-0SCREW, MACHINE, SET, SCR, M3.0*8, BLK TMP/SW*8590-5

45、3006-100-0SCREW, MACHINE, SET, SCR, M3.0*6, NI POWER IC*28590-53010-100-0SCREW, MACHINE, SET, SCR, M3.0*10, NI 590-54008-100-0SCREW, MACHINE, SET, SCR, M4.0*8, NI 610-30400-501-0WASHER, TOOTH, D4*D8.5*0.5,NI POWER IC*28610-60300-501-0WASHER, PAN, SPR, D3.0*D7.0*0.5, NI 39 Parts List Schematic Diagra

46、m 6 MAR2/4/6 INPUT BOARD (PCB-C) Ref. PHONIC Part # Description J301, J302 211-03300-170-0 CONN, 1/4,XLR-JACK, NCJ6FK-V, NEUTRIK J303 211-24500-001-0 CONN, 1/4, SCREW, TERMINAL, 5-PIN JK302 212-10080-340-0 CONN, 1/4, WAFER, PLUG, 8-PIN, 140mm R301A, R301B, R302A, R302B 000-10426-400-0 RES, CF, 1/4W,

47、 100K, 5% R303A, R303B 000-22326-400-0 RES, CF, 1/4W, 22K, 5% Parts List MAR2/4/6 INPUT BOARD (PCB-C) Ref. PHONIC Part # Description INPUT BOARD MAR2/4/6F34-00000-004-0MAR2/4/6, PCB-C PCB-C290-34280-301-0PCB, MAR-CFGHIJ 382-20010-010-0TINNER, WIRE, 10mm, D0.6 TERMINAL*4590-53006-200-0SCREW, MACHINE,

48、 SET, SCR, M3.0*6, BLK TERMINAL*2615-10053-620-0COPPER, RIVET, HEX, L=17, M3 MAR2/4/6 PCB-C INPUT BOARD A/IH34-00002-004-0MAR2/4/6, PCB-C 40 Parts List Schematic Diagram 7 MAR2/4/6 CH-2 VR BOARD (PCB-F) Ref. PHONIC Part # Description CLIP LED801 100-00010-030-1 LED, SE3011, RED, 3mm W8-702 212-10022-610-0 CONN, 1/4, WAFER, PLUG, 2-PIN, 120mm 41 Parts List Schematic Diagram 8 MAR2/4/