Pioneer-VSX-26TX-Service-Manual电路原理图.pdf

ORDER NO. PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan PIONEER ELECTRONICS SERVICE, INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A. PIONEER ELECTRONIC (EUROPE) N.V. Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936 ? ? ? ? ? ? PIONEER ELECTRONIC CORPORATION 1999c VSX-29TX RRV2133 1. SAFETY INFORMATION.2 2. EXPLODED VIEWS AND PARTS LIST.3 3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM.10 4. PCB CONNECTION DIAGRAM . 48 5. PCB PARTS LIST.71 6. ADJUSTMENT.83 CONTENTS 7. GENERAL INFORMATION . 84 7.1 DISASSEMBLY . 84 7.2 PARTS.86 7.2.1 IC . 86 7.2.2 DISPLAY.90 7.3 REMOTE CONTROL UNIT . 92 8. PANEL FACILITIES AND SPECIFICATIONS.103 T IZK MAY 1999 Printed in Japan VSX-27TX AUDIO/VIDEO MULTI-CHANNEL RECEIVER VSX-26TX VSX-24TX VSX-D908S Type Model Power RequirementRemarks VSX-29TXVSX-27TXVSX-26TXVSX-24TXVSX-D908S KU/CAAC120V THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S). SBY S S S S V VS VV V VVS SY V V S S N m/m V V RadioFans.CN 收音机爱 好者资料库 2 VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 1. SAFETY INFORMATION This service manual is intended for qualified service technicians ; it is not meant for the casual do-it- yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual. Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty. If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so and refer the repair to a qualified service technician. WARNING This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California to cause cancer, birth defects or other reproductive harm. Health VSX-29TX : AKB7121 OTHERS : AKB7095 JA1011-JA1013 ; VSX-29TX : AKB7108 OTHERS : AKB7048 CN1014: AKB7108 (VSX-29TX ONLY) JA1014: AKB7050 (VSX-24TX ONLY) JA1015: AKB7048 JA1016: AKB7120 (VSX-27TX, VSX-26TX, VSX-D908S ONLY) CN1101 CN1001 CN1002 A EXTRA-5.1 ASSY (VSX-29TX : AWX7314) EXTERNAL IN ASSY (OTHERS : AWX7398) B A-PINJACK ASSY (VSX-29TX : AWX7312) (VSX-27TX, VSX-26TX, VSX-D908S : AWX7397) (VSX-24TX : AWX7401) V1 V1V1 V2 V2 MD MD P PP LDLD LD LD TVTV TV A B VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 15 A B C D 5678 5678 CN1351 CN1301 CN1302 CN1353 CN1352 CCONNECTION ASSY (AWX7313) CN103D1/3 CN101D1/3 : AUDIO SIGNAL ROUTE (LD) LD : AUDIO SIGNAL ROUTE (TV) TV : AUDIO SIGNAL ROUTE (VCR1) V1 V1 V1 V2 V2 : AUDIO SIGNAL ROUTE (VCR2) V2 : AUDIO SIGNAL ROUTE (MD) MD MD MD : AUDIO SIGNAL ROUTE (PHONO) P P PP PP P LD LD TV TV C VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 16 A B C D 1234 1234 1SS355 1SS355 VSX-24TX ONLY D2/3 D2/3 D2/3 CN7005 CN906 52045-0545 S CN1353C CN101 JA901 (1/2) CN941 (1/2)CN941 (2/2) CN911 (2/2)CN941 (2/2)CN911 (1/2)CN941 (1/2) VSX-24TX VSX-29TX JA901 : AKB7075 JA911 : AKB7075 VSX-27TX, VSX-26TX, VSX-D908S CN941 : AKB7075 JA911 : DKB1045 JA931 : VKB1060 VSX-24TX CN941 : AKB7015 CN911 : AKB7015 VSX-27TX, VSX-26TX, VSX-D908S VSX-29TX JA911JA931 JA901 (2/2)JA911 (1/2)JA911 (2/2) P P LD CD T2 TU V2 MR CD CD T2 TU TU T2 TU T2 MRMR MR MR MR V1 MD TV LD TV V2 V1 MD : The power supply is shown with the marked box. 3.4 MAIN CONTROL ASSY (1/3) 1/3D VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 17 A B C D 5678 5678 1/2 2/2 VSX-24TX ONLY VSX-24TX ONLY VSX-24TX ONLY EXCEPT VSX-24TX 1/3 MAIN CONTROL ASSY (VSX-29TX : AWX7306)(VSX-24TX : AWX7406) (VSX-27TX : AWX7393)(VSX-D908S : AWX7424) (VSX-26TX : AWX7399) D CN5004MCN1302 CN103 CN104 C : AUDIO SIGNAL ROUTE (LD) LD : AUDIO SIGNAL ROUTE : AUDIO SIGNAL ROUTE (TV) TV : AUDIO SIGNAL ROUTE (VCR1) V1 : AUDIO SIGNAL ROUTE (VCR2) V2 : AUDIO SIGNAL ROUTE (MD) MD : AUDIO SIGNAL ROUTE (PHONO) P : AUDIO SIGNAL ROUTE (TUNER) TU : AUDIO SIGNAL ROUTE (CD) CD : AUDIO SIGNAL ROUTE (TAPE2) T2 : AUDIO SIGNAL ROUTE (MR) MR MR MR MR MR MR 1/3D VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 18 A B C D 1234 1234 3.5 MAIN CONTROL ASSY (2/3) 2/3MAIN CONTROL ASSY (VSX-29TX : AWX7306)(VSX-24TX : AWX7406) (VSX-27TX : AWX7393)(VSX-D908S : AWX7424) (VSX-26TX : AWX7399) D D1/3 D1/3D3/3 2/3D VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 19 A B C D 5678 5678 Q107 - Q112 : HN1C03F E1/2 CN501 CN105 D1/3 D3/3 103 or 113 (2/3) 103 or 113 (1/3) 103 or 113 (3/3) VSX-29TX 103 : AKB7088 OTHERS 113 : AKB7089 : AUDIO SIGNAL ROUTE : The power supply is shown with the marked box. 2/3D VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 20 A B C D 1234 1234 1SS355 D905-D908 1SS355 1SS355 D901-D904 1SS355 D2/3 Y4/5CN9551 To FM/AM TUNER UNIT CN902 CN903 CN920CN901 CN5008MCN5005M TU TU TU 3/3D 3.6 MAIN CONTROL ASSY (3/3) VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 21 A B C D 5678 5678 3/3 MAIN CONTROL ASSY (VSX-29TX : AWX7306) (VSX-24TX : AWX7406) (VSX-27TX : AWX7393) (VSX-D908S : AWX7424) (VSX-26TX : AWX7399) D CN904 CN7001S CN905 CN108 CN701P CN5003M R921 : VSX-26TX, VSX-D908S ONLY R922 : VSX-29TX, VSX-27TX, VSX-24TX ONLY R923 : VSX-27TX, VSX-D908S ONLY R924 : VSX-29TX, VSX-26TX, VSX-24TX ONLY R925 : VSX-29TX, VSX-D908S ONLY R926 : VSX-27TX, VSX-26TX, VSX-24TX ONLY 1 1 : AUDIO SIGNAL ROUTE (TUNER) TU : The power supply is shown with the marked box. 3/3D VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 22 A B C D 1234 1234 VSX-29TX VSX-27TX VSX-26TX VSX-24TX VSX-D908S R7504 R7524 R7544 R7604 R7624 10k0 1/2V-AMP ASSY (VSX-29TX, VSX-27TX, VSX-26TX : AWX7309) (VSX-24TX, VSX-D908S : AWX7409) E IC7601 (1/2) UPC4570G2 IC7501 (1/2) UPC4570G2 IC7541 (1/2) UPC4570G2 IC7521 (1/2) UPC4570G2 IC7621 (1/2) UPC4570G2 D2/3 E2/2 CN105 505, 506 VEF1040 CN501 E2/2 3.7 V-AMP ASSY (1/2) 1/2E VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 23 A B C D 5678 5678 IC7601 (2/2) UPC4570G2 IC7501 (2/2) UPC4570G2 IC7541 (2/2) UPC4570G2 IC7521 (2/2) UPC4570G2 IC7621 (2/2) UPC4570G2 E2/2 VSX-29TX, VSX-27TX, VSX-26TX ONLY VSX-29TX, VSX-27TX, VSX-26TX ONLY VSX-29TX, VSX-27TX, VSX-26TX ONLY VSX-29TX, VSX-27TX, VSX-26TX ONLY VSX-29TX, VSX-27TX, VSX-26TX ONLY : AUDIO SIGNAL ROUTE 1/2E VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 24 A B C D 1234 1234 E1/2 E1/2 E1/2 E1/2 CN504 2/2E 3.8 V-AMP ASSY (2/2) VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 25 A B C D 5678 5678 2/2V-AMP ASSY (VSX-29TX, VSX-27TX, VSX-26TX : AWX7309) (VSX-24TX, VSX-D908S : AWX7409) E E1/2 E1/2 CN502 CN2001 F : AUDIO SIGNAL ROUTE 2/2E VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 26 A B C D 1234 1234 2SC1740C 2SA970 2SA970 F C-AMP-N ASSY (AWX7318) G C-AMP-P ASSY (AWX7317) OUTPUT-FL ASSY (AWX7319) HB OUTPUT-SL ASSY (AWX7322) HA E2/2 CN502 CN2001 CN2601CN2501 CN2602 CN2503 CN2502 CN2603 CN2604 CN2504 LL 3.9 C-AMP-N, C-AMP-P, OUTPUT-SL, OUTPUT-FL, OUTPUT-C, OUTPUT-FR, OUTPUT-SR and VL-TERMINAL ASSYS F GHA HB VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 27 A B C D 5678 5678 2SA970 2SA970 2SA970 IVL-TERMINAL ASSY (AWX7324) OUTPUT-SR ASSY (AWX7323) HE OUTPUT-FR ASSY (AWX7320) HD OUTPUT-C ASSY (AWX7321) HC CN2541CN2521CN2621 CN2542 CN2522 CN2523 CN2623CN2622 CN2624 CN2524 CN2543 CN2544 LL L L : AUDIO SIGNAL ROUTE IHC HD HEGF VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 28 A B C D 1234 1234 3.10 TRANS 2-1, DIODE and SP/PS ASSYS VSX-26TX VSX-24TX VSX-D908S VSX-29TX VSX-27TX CN3001 3001 4001 J TRANS 2-1 ASSY (AWX7326) KDIODE ASSY (AWX7343) LSP/PS ASSY (VSX-29TX, VSX-27TX : AWX7402) (VSX-26TX, VSX-24TX, VSX-D908S : AWX7325) II CN6003 POWER TRANSFORMER V HE NOTE FOR FUSE REPLACEMENT FOR CONTINUED PROTECTION AGAINST RISK OF FIRE. REPLACE WITH SAME TYPE AND RATINGS ONLY. CAUTION - FU4, FU5 : 2.5A REK1079 CAUTION : FOR CONTINUED PROTECTION AGAINST RISK OF F RE. REPLACE ONLY WITH SAME TYPE NO. 49102.5 MFD, BY LITTELFUSE INC. FOR IC4501, IC4502 (AEK7014). J K L VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 29 A B C D 5678 5678 VSX-26TX VSX-24TX VSX-D908S VSX-29TX VSX-27TX CN3101 3004 CN3003 CN3102 CN5001 CN5002 M I M HAHE L VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 30 A B C D 1234 1234 3.11 REGULATOR, TRANS 1 and TRANS 2-2 ASSYS M N O D5010 1SS133 MTZJ10CMTZJ5.1B MREGULATOR ASSY (AWX7310) NTRANS 1 ASSY (AWX7316) O TRANS 2-2 ASSY (AWX7366) POWER TRANSFORMER 3004 CN5001 CN5002 5501 5009 52147-0810 L V J CN3003L CAUTION : FOR CONT NUED PROTECTION AGA NST RISK OF FIRE. REPLACE ONLY WITH SAME TYPE NO. 491.200 MFD, BY LITTELFUSE INC. FOR IC5009, IC5010 (AEK7023). CAUTION : FOR CONT NUED PROTECTION AGA NST RISK OF FIRE. REPLACE ONLY WITH SAME TYPE NO. 491004 MFD, BY LITTELFUSE INC. FOR IC5501 (AEK7018). VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 31 A B C D 5678 5678 O CN5006CN5007 CN5005 CN5008 CN5004 CN5003 CN108 D3/3 CN104 D1/3 CN901 D3/3 CN920 D3/3 CN9801Y2/5CN9802 Y2/5 : AUDIO SIGNAL ROUTE VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 32 A B C D 1234 1234 PVIDEO ASSY (VSX-29TX : AWX7307) (VSX-27TX, VSX-26TX, VSX-D908S : AWX7394) (VSX-24TX : AWX7407) 1SS355 1SS355 1SS355 1SS355 1SS355 EXCEPT VSX-24TX VSX-24TX ONLY 702(2/2) 702(2/2) 702(1/2) 702(1/2) JA701(3/3) 707 JA701(1/3)JA701(2/3)JA703(1/3) JA703(1/3) JA703(2/3) JA703(2/3) JA703(3/3) JA703(3/3) VSX-29TX, VSX-24TX 702VSX-29TX : AKB7076 VSX-27TX,VSX-26TX,VSX-24TX,VSX-D908S : AKB7017 JA701VSX-29TX : AKB7109 VSX-24TX : AKB7056 JA703VSX-29TX : AKB7116 VSX-27TX,VSX-26TX,VSX-24TX,VSX-D908S : AKB7115 707VSX-27TX,VSX-26TX,VSX-D908S : AKB7020 VSX-27TX, VSX-26TX, VSX-D908S CN702 CN701 CN905D3/3 Y Y Y Y Y 3.12 VIDEO and S-VIDEO ASSYS P VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 33 A B C D 5678 5678 QS-VIDEO ASSY (VSX-29TX : AWX7308) (OTHERS : AWX7395) 1SS355 1SS355 1SS355 1SS355 CN804 CN802 (2/2) VSX-29TX : AKP7023 OTHERS : AKP7020 CN803 (1/2) VSX-29TX : AKP7023 OTHERS : AKP7020 CN802 (1/2) VSX-29TX : AKP7023 OTHERS : AKP7020 CN803 (2/2) VSX-29TX : AKP7023 OTHERS : AKP7020 JA801 (3/3) VSX-29TX : AKP7049 OTHERS : AKP7043 JA801 (1/3) VSX-29TX : AKP7049 OTHERS : AKP7043 JA801 (2/3) VSX-29TX : AKP7049 OTHERS : AKP7043 : AUDIO SIGNAL ROUTE : Y SIGNAL ROUTE Y : C SIGNAL ROUTE C Y Y Y Y Y Y Y Y Y Y C C C C C C C CC C C C Y C Y Y YY Y Y Y C C C C C C C Y Q VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 34 A B C D 1234 1234 RH. PHONE/F. VIDEO ASSY (AWX7342) SDISPLAY ASSY (VSX-29TX, VSX-27TX : AWX7327) (VSX-26TX : AWX7404) (VSX-24TX : AWX7408) (VSX-D908S : AWX7427) CN7201CN7004 CN7005 VSX-29TX, VSX-27TX ONLY S7001 : STANDARD S7002 : STEREO S7003 : DSP MODE S7004 : ADVANCED S7005 : THX CINEMA S7006 : STAND BY/ON S7007 : EXTERNAL DECODER IN S7008 : SPEAKERS S7009 : DIRECT S7010 : BASS S7011 : LOUDNESS S7012 : BASS + S7013 : MIDNIGHT S7014 : TREBLE S7015 : DIGITAL NR S7016 : TREBLE + S7017 : SIGNAL SELECT S7018 : INPUT ATT S7019 : MPX S7020 : TAPE2 MONITOR S7021 : CLASS S7022 : FL DIMMER S7023 : FM/AM S7024 : MEMORY S7025 : TUNING S7026 : STATION S7027 : TUNING + S7028 : STATION + S7029 : CONTROL S7030 : MULTI-ROOM & SOURCE VSX-29TX, VSX-27TX ONLY EXCEPT VSX-24TX EXCEPT VSX-D908S M663111FP CN906D1/3 3.13 H. PHONE/F. VIDEO, DISPLAY, ROTARY ENCODER and VOLUME ASSYS R S VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 35 A B C D 5678 5678 TROTARY ENCODER ASSY (VSX-29TX, VSX-27TX : AWX7328) (VSX-26TX, VSX-24TX, VSX-D908S : AWX7405) UVOLUME ASSY (AWX7367) VSX-29TX, VSX-27TX ONLY VSX-26TX, VSX-24TX, VSX-D908S ONLY CN7003CN7301 CN7002CN7101 EXCEPT VSX-24TX CN7001 2SA1037K CN904D3/3 UTS VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 36 A B C D 1234 1234 3.14 PRIMARY ASSY VPRIMARY ASSY (AWX7311) CN3001 CN6003 KP200TA4L CN6002 RKP1751 LIVE NEUTRAL FU1 : 10A VEK1029 AC N 2.2M 1/2W L N 1SS133 DTC143ES 1SS133 D6001-D6004 : S5688G NOTE FOR FUSE REPLACEMENT FOR CONTINUED PROTECTION AGAINST RISK OF FIRE. REPLACE WITH SAME TYPE AND RATINGS ONLY. CAUTION - V VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 37 A B C D 1234 1234 3.15 DIGITAL-I/O and RF TERMINAL ASSYS WDIGITAL-I/O ASSY (VSX-29TX : AWX7315) (VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S : AWX7396) XRF TERMINAL ASSY (AWX7376) CN9803 CN1201 CN1250 VSX-29TX, VSX-27TX ONLY VKB1074 GP1F38T2 GP1F37R1 GP1F37R1 JA1204 (1/2) VSX-29TX : AKB7121 OTHERS : AKB7095 JA1204 (2/2) VSX-29TX : AKB7121 OTHERS : AKB7095 Y2/5 CN9804 Y2/5 : AUDIO SIGNAL ROUTE XW VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 38 A B C D 1234 1234 1/5DSP ASSY (VSX-29TX, VSX-27TX : AWX7272) (VSX-26TX, VSX-24TX, VSX-D908S : AWX7433) Y Y2/5 MA Y4/5 VSX-26TX, VSX-24TX, VSX-D908S ONLY MB 3.16 DSP ASSY (1/5) 1/5Y VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 39 A B C D 5678 5678 VSX-29TX, VSX-27TX ONLY 1/5Y VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 40 A B C D 1234 1234 2/5DSP ASSY (VSX-29TX, VSX-27TX : AWX7272) (VSX-26TX, VSX-24TX, VSX-D908S : AWX7433) Y CN5007 VSX-29TX, VSX-27TX ONLY VSX-26TX, VSX-24TX, VSX-D908S ONLY CN9804 CN9803 M CN1250 X CN1201W Y5/5 Y1/5 Y4/5 Y5/5 Y3/5 ME MA MF ERR PCMD : AUDIO SIGNAL ROUTE : The power supply is shown with the marked box. 3.17 DSP ASSY (2/5) 2/5Y VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 41 A B C D 5678 5678 CN5006 M CN9802 Y3/5Y4/5 MPMG 2/5Y VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 42 A B C D 1234 1234 3.18 DSP ASSY (3/5) 3/5DSP ASSY (VSX-29TX, VSX-27TX : AWX7272) (VSX-26TX, VSX-24TX, VSX-D908S : AWX7433) Y Y4/5 Y4/5 Y2/5 Y2/5 MJ MI MG PCMD 3/5Y VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 43 A B C D 5678 5678 : AUDIO SIGNAL ROUTE 3/5Y VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 44 A B C D 1234 1234 4/5DSP ASSY (VSX-29TX, VSX-27TX : AWX7272) (VSX-26TX, VSX-24TX, VSX-D908S : AWX7433) Y Y3/5 Y2/5 Y1/5 Y5/5 VSX-29TX, VSX-27TX ONLY CN903 CN9551 D3/3 MJ MF MO MB 3.19 DSP ASSY (4/5) 4/5Y VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 45 A B C D 5678 5678 Y2/5 Y5/5 Y3/5 MP MI MN : AUDIO SIGNAL ROUTE 4/5Y VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 46 A B C D 1234 1234 3.20 DSP ASSY (5/5) 5/5 DSP ASSY (VSX-29TX, VSX-27TX : AWX7272) (VSX-26TX, VSX-24TX, VSX-D908S : AWX7433) Y Y4/5 Y2/5 Y4/5 MN ERR MO C9742 - C9744 : VSX-29TX, VSX-27TX ONLY 5/5Y VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 47 A B C D 5678 5678 Y2/5ME : AUDIO SIGNAL ROUTE 5/5Y VSX-29TX, VSX-27TX, VSX-26TX, VSX-24TX, VSX-D908S 48 NOTE FOR PCB DIAGRAMS : 1. Part numbers in PCB diagrams match those in the schematic diagrams. 2. A comparison between the main parts of PCB and schematic diagrams is shown below. 3. The parts mounted on this PCB include all ne