JVC-THS77-ddcs-sm维修电路原理图.pdf

SERVICE MANUAL COPYRIGHT 2005 Victor Company of Japan, Limited No.MB421 2005/7 DVD DIGITAL CINEMA SYSTEM MB42120057 TH-S77 Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25 PHONESMIC 2MIC 1 MIN MIC LEVEL MAX Area suffix US - Singapore UP - Korea UT - Taiwan UX - Saudi Arabia UG - Turkey,South Africa,Egypt UN - Asean (SP-THS77F)(SP-THS77F)(SP-THS77S) (SP-PWS77) (XV-THS77) (SP-THS77C) RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB421) SPECIFICATION Center unit (XV-THS77) *1: This value is measured at System cord CONNECTOR for reference. *2: Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency -32 kHz, 44.1 kHz, 48 kHz) Subwoofer (SP-PWS77) Audio section Total Harmonic Distortion *10.02% Audio input level AUDIO IN (VCR)270 mV/47 k Digital input *2DIGITAL IN (OPTICAL)-21 dBm to -15 dBm (660 nm E30 nm) Video section Video SystemPAL/NTSC Horizontal Resolution500 lines Signal-to-Noise Ratio64 dB Video input sensitivity/Impedance (VCR IN)Composite: 1.0 V(p-p)/75 S-video-Y: 1.0 V(p-p)/75 S-video-C: For PAL 0.3 V(p-p)/75 S-video-C: For NTSC 0.286 V(p-p)/75 Video output levelComposite: 1.0 V(p-p)/75 S-video-Y: 1.0 V(p-p)/75 S-video-C: For PAL 0.3 V(p-p)/75 S-video-C: For NTSC 0.286 V(p-p)/75 Component-Y: 1.0 V(p-p)/75 Component-PB/PR: 0.7 V(p-p)/75 Tuner section Tuning RangeFM87.50 MHz to 108.00 MHz AM (Except for the countries of Middle East) 531 kHz to 1 710 kHz(at 9 kHz intervals) 530 kHz to 1 710 kHz(at 10 kHz intervals) AM (For the countries of Middle East)531 kHz to 1 602 kHz(at 9 kHz intervals) 530 kHz to 1 600 kHz(at 10 kHz intervals) GeneralPower RequirementsAC 110 - 240 V , 50/60 Hz Power Consumption17 W (at operation) 1.4 W (in standby mode) Dimensions (W H D)435 mm 55 mm 304 mm Mass2.5 kg Amplifier sectionFront140 W per channel, RMS at 4 at 1 kHz, with 10 % total harmonic distortion. Center/Surround130 W per channel, RMS at 4 at 1 kHz, with 10 % total harmonic distortion. Subwoofer140 W, RMS at 4 at 100 Hz, with 10 % total harmonic distortion. Speaker sectionSpeaker unit16 cm Bass-reflex Power Handling Capacity140 W Impedance4 Frequency Range30 Hz to 200 Hz GeneralPower RequirementsAC 110 V/AC 127 V/AC 220 - 240 V, 50 Hz/60 Hz Power Consumption135 W (at operation) 0 W (in standby mode) Dimensions (W H D)170 mm 411 mm 451 mm Mass11.5 kg RadioFans.CN 收音机爱 好者资料库 (No.MB421)1-3 Satellite Speakers Designs * E70306- 002 A :AUSTRALIA A+12V A- 12V Ver.UF/UB 220V 50Hz Ver.UP 220V 60Hz POWER PWB NI * * * *B3001 (B- 10) B3004 (C- 12) B3003 NONE (B- 12) NONE (1/4W)UNF 5.0V 5.0V 0V 0V 4.0V 4.1V - 22.8V - 22.3V - 23.0V UT:TAIWAN UG:TURKEY/EGYPT/SOUTHAFRICA Standard schematic diagrams Power supply section 2-3 SHEET 2 Parts are safety assurance parts. When replacing those parts make sure to use the specified one. + - + - + - + - + - + - + - + - C CV- Y1 Y2- G CB- B STAND- BY REMOCON BLANK- CTL VIDEO- SW VCR- S/C VIDEO- SW VIDEO- MUTE1 VIDEO- MUTE2 VIDEO- YCMIX VIDEO- RGB SAFETY BLANK- CTL VS1 VS3 VOL- DT VOL- CK VS3 VS1 VIDEO- RGB VIDEO- YCMIX VIDEO- MUTE2 VIDEO- MUTE1 U2SDT UCS SCS CPURST F+ F- - VDISP DVD- PON SYS- PON DVD- PON SYS- PON S- MUTE SW- PON AM- BEAT S- MUTE SW- PON AM- BEAT HP- DET HP- DET SMUTE SWPON SCART- LIN SAFETY HPOUT- R OUT- C OUT- SW OUT- SL OUT- SR OUT- SL OUT- SR OUT- C OUT- SW HPOUT- L HPOUT- R A+12V A- 12V AGND CR- R DI- CS RDS- DATA MICMUTE CPURST CLOSESW RDS- CLK TU- PON L- R TU TU- DI TU- DO TU- CK TU- CE TU- CE TU- DO TU- CK TU- DI TU- PON RDS- CLK RDS- DATA CLOSESW OPENSW UCS VCR- S/C SCART- RIN U2SDT S2UDT SCLK SCLK S2UDT SCS SETUP Y2- G CB- B CR- R C CV- Y1 OPENSW TCLOSE TOPEN KEY2 KEY1 ECHO VOL- MUTE A5V A5V ECHO STAND- BY L- R SETUP SWPON VOL- MUTE VOL- DT SMUTE VOL- CK TU A+12V A+12V A- 12V AGND AGND AGND KEY1 KEY2 MIC A+12V A5V A5V STANBY ILLU- LED REMOCON DI- CS DI- DT DI- CK - VDISP F+ F- HP- DET DVDPWR DVDPWR TCLOSE TOPEN HPOUT- L AVVLR AGND MIC MICMUTE MICMUTE SCART- RIN AGND A+12V VS3 VS1 A5V AGND Y2- G C CR- R CB- B BLANK- CTL AGND VCR- S/C Q4811 KRA102S- X VIDEO- SW VIDEO- MUTE1 VIDEO- MUTE2 VIDEO- YCMIX VIDEO- RGB Q4812 KRC102S- X D4811 1SS133- T2 Q4921 KTC3203/OY/- T D4921 MTZJ8.2C- T2 Q4931 KTA1271/OY/- T X4701 QAX0246- 001Z 321 D4703 MTZJ4.7B- T2 Q4701 KRC111S- X D4704 1SS133- T2 Q4702 KRC107S- X D4931 MTZJ8.2C- T2 D4922 1SS133- T2 D4932 1SS133- T2 D4891 NI D4833 1SS133- T2 D4832 1SS133- T2 D4835 MTZJ6.8A- T2 D4834 1SS133- T2 X4071 QAX0868- 001Z D4705 SHORT NI Q4703 KRC102S- X Q4951KRA104S- X Q4952 KRA104S- X Q4801 KTA1504/YG/- X Q4802 KRC102S- X SHORT CP471 ! Q4091 KTA1271/OY/- T Q4092 KTC3875/YG/- X D4091 1SS133- T2 D4092 MTZJ6.8A- T2 Q4961 KTC3203/OY/- T D4961 MTZJ4.7A- T2 Q4821 KRC102S- X Q4831 KRC102S- X D4831 1SS133- T2 IC491 KIA7805API 1 2 3 IC475 RC4558D- X 6 5 7 8 4 IC476 RC4558D- X 6 5 7 8 4 IC476 RC4558D- X 2 3 1 SCART- LIN IC601 RC4558D- X 6 5 7 4 8 CV- Y1 IC475 RC4558D- X 2 3 1 K4701 QQR0621- 001Z K4702 QQR0621- 001Z 4 J4891 NI 2 1 3 IC601 RC4558D- X 2 3 1 D4966 MTZJ4.7C- T2 IC478 RC4558D- X 2 3 1 IC478 RC4558D- X 6 5 7 8 4 IC471 MN101CF49KRD 12345678910111213141516171819202122232425 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 IC473 SN74AHCT08NS- X 141312111098 7654321 IC481 BU1924F- X 161514131211109 87654321 IC474 CD4066BM- X 891011121314 7654321 IC477 BR24L08F- W- X 8765 4321 CN406 QGD2504C1- 04Z 4 3 2 1 CN410 QGF1205C1- 11 1 2 3 4 5 6 7 8 9 10 11 CN407 QGD2504C1- 05Z 5 4 3 2 1 CN405 QGD2504C1- 05Z 5 4 3 2 1 CN404 QGD2504C1- 05Z 5 4 3 2 1 CN408 QGF1036C1- 05 5 4 3 2 1 IC472 S- 80840CNNB- G- W 12 34 D4962 1N4003S- T5 D4998 1SS133- T2 Q4971 2SC3661- X Q4972 2SC3661- X Q4973 KRA104S- X D47091SS133- T2 D47081SS133- T2 D4707 1SS133- T2 D4706 1SS133- T2 CN416 QGA2501C1- 05 1 2 3 4 5 Q4832 KRA110S- X Q4833 KRC110S- X D4841 MTZJ2.0A- T2 D4842 MTZJ3.3A- T2 CN412 QGF1036C1- 07 7 6 5 4 3 2 1 CN401 QGF1036C1- 15 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 CN415 QGF1205C1- 06 1 2 3 4 5 6 0.1/16 C4771 C4710 0.01/50 2.2/50 C4703 C4793 0.1/16 470p/50 C4606 10P/50 C6102 C6617 470p/50 0.22/50 C4801 0.1/16 C4073 47/25 C4071 100/16C4932 C4721 0.1/16 C4711 470/6.3 C6618 470p/50 C4772 0.1/16 C6613 4.7/50 0.0082/50 C4011 C4716 0.1/16 0.022/16 C4704 C4091 22/50 10P/50 C6202 C4720 0.1/16 C6611 4.7/50 0.1/16 C4791 0.0082/50 C4012 C4717 0.1/16 NI C4892 4.7/50 C6201 0.01/50 C4904 33P/50 C4078 100/16C4901 C6511 4.7/50 220/6.3 C4702 NI C4891 C4795 0.1/16 0.01/50C4705 C651656P/50 C6513 4.7/50 C6502 56p/50 100/16C4903 1.5/25 C4006 C6105 0.01/50 47/25 C6203 4.7/50 C6101 100/16 C4961 C6514 0.1/16 C6612 56p/50 C4719 0.01/50 560P/50 C4074 47/25 C6103 C6205 0.01/50 C4715 0.1/16 C6512 56p/50 0.01/50 C4902 C4718 0.01/50 270P/50 C4076 C6515 0.1/16 0.01/50 C4706 47/25 C6902 C4713 0.1/16 1.5/25 C4003 C6517 470p/50 C4714 0.1/16 2.2/10 C4075 C4079 0.01/50 0.01/50 C4708 C661656P/50 47/25 C6901 47/25 C4931 1.5/25 C4004 C6204 0.1/16 C6602 56p/50 47/25 C4921 C6615 0.1/16 100/16C4707 C6614 0.1/16 33P/50C4077 100/16 C4092 C6518 470p/50 470p/50 C4605 C4712 0.1/16 C6104 0.1/16 0.01/50C4709 100/16C4922 R6518 22k R6514 10k R6302 270 R6618 22k R4711 330 R6512 10k R6616 10k R6502 10k R4771 10k R4764 10k 10kR4752 R6106 33 R6605 10k R4786 SHORT R4876 330 R6606 10k R6615 1k 10k R4758 R6304 270 SHORT R4708 R6516 10k 10kR4755 R4712 330 R6504 SHORT NI R4891 FR R4931 10 ! R4774 10k 10kR4753 R6602 10k 22k R6101 R6206 33 220 R4791 R4875330 R6507 10k R4756 NI 39K R4834 R6513 100k R6305 270 R6601 100k R4709 100 NI R4892 180R4821 10kR4754 R6207 39 1KR4072 R4775 330 R6609 47k 12K R4833 270 R4961 4.7KR4881 150R4822 R4713 330 R6612 10k R6608 1k R6503 1k 0 R4998 R6107 39 2.2K R4922 1K R4011 R4776 330 1KR4073 R6508 1k 2.2k R6102 R4971 2.2k 10K R4773 1K R4012 2.7K R4866 2.2k R4760 R6501 100k R4777 100 680 R4841 R4781 100 22KR4706 10K R4092 R6614 10k 0 R4997 1k R6515 100 R4605 6.8K R4013 22K R4951 4.7KR4883 10k R4761 R6603 1k R4778 100 R6607 10k 1K R4703 4.7K R4091 2.2 R4843 1w R4785 SHORT R4782 100 R6511 33k 330 R4864 10k R4762 6.8K R4014 22k R6201 R4783 SHORT R6105 47k R4779 330 2.2K R4932 R6517 100k 2.2K R4861 330R4871 R6611 33k 68k R6203 SHORT R6604 22K R4801 R6205 47k R4780 330 R6613 100k 22K R4832 22K R4952 10K R4704 2.2KR4863 R4751 10k 330R4872 R6617 100k 100 R4606 22K R4802 2.2k R6202 FR R4811 4.7 ! FR R4921 10 ! 4.7K R4835 0R4999 15K R4831 R6303 270 R4710 100k 4.7k R4705 330 R4873 R4877330 R4763 10k 10K R4707 R4765 10k 68k R6103 R4973 1k R6509 47k R4784 SHORT R4972 220k R6506 10k R6505 10k 820 R4093 5.6KR4886 10K R4772 R4842 10k Q4834 NI R4889 330 R4888 330 R4887NI R4890 10k R488510k R6510 100k R6610 100k R4974 180k R4975 180k C6501 0.22/16 C6503 0.22/16 C6601 0.22/16 C6603 0.22/16 C4017 150p/50 C4016 0.001/50 C4015 150p/50 C4014 150p/50 D4997 MTZJ3.0B- T2 R4759 10k C4013 NI B4256 QUY150- 050Y CN402 QGF1036C1- 25 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 IC493 LB1641 12345678910 100/16C4794 CN452 QGF1205C1- 05 1 2 3 4 5 Q511 KRC102S- X CN411 QGF1036C1- 29 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 CN460 QGF1205C1- 09 9 8 7 6 5 4 3 2 1 CN451 QGF1036C1- 13 1 2 3 4 5 6 7 8 9 10 11 12 13 CN420 QGD2504C1- 04Z 1 2 3 4 R4894 330 R4996 10K R4074 10K 1KR4702 330P/50 C6106 330P/50 C6206 CN480 QGF1205C1- 05 1 2 3 4 5 NI R4701 CN413 QGA2501C1- 02 1 2 C4700 10/50 R4700 2.2K SYSTEM MICOM KEY- IN3 KEY- IN4 (8MHz) (8MHz) VPP NC GND VCC RST (FOR FLASH) NC NC NC AVC- OUT AVC- IN VERSION1 DGND NTSEL(RGBSEL) VCR- S/C VERSION2 DI- DO DI- CK AGND (1/2) HPSW NC KEY- IN2 D3.3V 12.3V7.1V 7.8V - 12.3V- 7.1V - 7.8V 5.0V SW- PON (DATA IN) VREF- 3.4V 4.1V 0V 0V 0V 0V AM- BEAT SELECT2 VREF+ VDD OSC2 OSC1 GND NC NC GND 0V SELECT3 SELECT4 209X- BLOCK 0V AM- BEAT CUT 0V4.7V 3.1V DVD- SAFETY 0V D5V DGND DGND B5V 0.3V 0.3V 0V KEY- IN1 5.0V NC NC NC NC (DATA OUT) B5V DVD5V DGND DGND DVD3.3V M9V 12.3V12.3V MGND MGND A+12V AGND DGND UCS CPU- RESET 0V A- 12V SCS SCLK/CLK DVDDGND DGND U2SDT/RX AGND RDS NC TU- R TU9V 0V VDD RESET TU- L S2UDT AGND TU- DTO TU- CKJ TU- DTI TU- CE 0V 4.8V 0V 4.9V 4.9V 4.9V 4.9V 4.9V A12V BACDUP AND DETECT RESET 4.9V A- 12V A7V A- 7V U2SDT TU- L AGND 4.9V 0V 4.9V 4.9V 2.3V 2.3V 0V S2UDT/TX NC NC NCCMP OSCO OSCI DVSS DVDD SDA SCL GND AVDD AVSS MPX VREF QOUT (WITHOUT FLASH) RDS DECODER TU9V REG SCLK FOR FLASH A5V REG MGND MGND TO TUNER S- MUTE DRIVER TX S5V SAFETY1 DETECT D2V YOUT DGND D4V A7V REG SCS A- 7V REG UCS /FLASH- VDD /FLASH- VSS S2UDT U2SDT CPURST SLCK 0V 0V 4.8V 4.7V 4.7V 4.7V 4.9V 4.7V 4.8V 4.8V 0V 0V 0V 0V 4.8V 0V 0V 0V 4.8V 4.8V 4.8V 0V 0V 0V TV- SOUND/AUX SELECT SW 0V 0V 0V 0V 0V 0V 0V 4.8V 4.9V 4.8V 3.6V 0V 0V 4.9V 4.9V 4.7V 3.3V 0V 4.9V 0V 0V 0V 4.9V 4.7V 0V 4.7V 4.9V 4.9V 4.9V 0V 0V 0V 4.9V 0V 0V 0V 0V VDD2 RESET- IN/RST 0V 4.9V 4.9V 0V 0V 4.9V 0V 0V 0V 0V 0V 0V 0V 0V DVDRST 0V 0V 0V 0V0V 4.8V 4.9V INH 0V 0V 4.9V 0V 0V AV COMPULINK 5.0V 4.9V 1.4V 0V 0V 0V 4.9V SELECT1 0V 4.9V 4.9V - 12.0V 0V 0V 5.0V 12.2V 0V DAVSS S- MUTE 0V 12.3V0V DAVDD 12.0V TO CN441 OF GVA10096- A1 3.6V 0V 0V 12.3V5.0V 0V * * * VER.E TU- R TU- SW OUT- R OUT- L AUX- L AUX- R - 12.3V 0V 0V 12.3V (2/2) (1/2) 0V DGND TV- R AUX- L TV- L VDD VSS AUX- R 12.3V 0V 0V 0V 0V 0V 0V - 12.3V (1/2) SWMUTE HPOUT- L HPOUT- R AGND FAOUTR FAOUTL A6V DVDPWR M9V AGND AINL AINR 11.3V 0V 0V 0V 0V - 11.3V 0V BGND NC 4.9V DIN D3.3V D2V 0V 0V 0V NC TO CN442 OF GVA10096- A1 HP AMP EEP ROM LEVEL SIFT AGND AGND A0 A1 A2 GND VCC WP SCL SDA 0V DGND DGND HP- R HP- L AGND D5V B5V TRAY- TRAY+ VCC2 VZ GND VCC1 P2 IN2 IN1 P1 OUT1 HP- DET TRAY DRIVE TO CN501 TO CN511 NC NC SDA WP SCL 0V COUT Y/G OUT CBOUT CROUT AGND AGND AGND A6V LRMUTE SETUP SETUP VER.E R4997/R4998 FOR J/C/U P- DOWN R4773P- DOWN R4763 R4774 NTSEL 10k S55/S58 VERSION2 VERSION1 P- UP 10k R4752 R4753 27k *PARTS LIST R4771 R4751 P- UP P- DOWN VCR- SW U1(PAL) : A/US/UB/UF E EMC 10k X U1 X P- UP * * * * (VERSION) (MODEL) U3(PAL) : UX/UG S58 /RGBSEL (PAL/RGB) (NTSC/YC) 10k 10K X27K 10K E : B/E/EN/EV/EE 10k U1 10k X 27k E S66 10k X 10k NO INSERT (B4159)(B4160) EP402 EP401 EP403 10k X 10k X (NTSC): UT/UP 4.9V0V 0V 5.0V 4.9V 0V 0V 0V 0V 4.9V 5.0V (1/2) (2/2) - 12.3V 12.3V 0V 0V 0V 0V 0V 0V 0V 0V 0V 4.7V - 7.1V (2/2) (1/2) (2/2) 3.4V 0V 0V 0V 0V 8.9V 8.9V 4.9V 4.9V 0V 0V 11.1V 11.1V 4.9V 4.9V 4.7V 0V - 7.1V 4.7V 4.7V 0V 0V 0V 0V - 7.1V - 7.1V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 2.5V2.2V 2.7V 2.6V 0V 5.0V 2.6V 5.0V 1.8V 2.4V 7.1V - 20.0V - 15.7V - 22.3V 5.0V 0V 0V 4.8V 4.8V 4.8V 4.9V 4.1V 0V 0V 0V 0V 0V 9.4V 12.6V - 12.9V 0.7V 0.1V 0V 9.4V 9.4V 0V 0V 0.5V 4.9V 0.5V 0V 0V 2.8V 0V 3.0V 4.1V 3.0V 0.4V 3.2V 3.2V 3.2V 3.2V 3.2V 3.1V 3.1V 0V 0V 0V 0.6V 0.6V 0V 0V - 19.9V - 15.6V - 22.2V 5.0V 4.7V 4.7V 0V 4.8V 4.8V 4.9V 4.9V 4.9V 0V 0V 9.2V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 2.5V 7.2V 2.5V 2.5V 2.5V 2.5V 0V 0V 0V 3.2V 2.8V 2.5V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V 0V - 7.2V 7.1V - 12.9V 12.6V 0V 2.5V 4.6V 0V 4.7V 0V 4.3V 12.6V 0V 0V 0V0V GVA10097- A1 MAIN PWB M5V RX 0.3V 0.3V OUT2 MGND OPENSW CLOSESW BGND D5V ILLU_LED A+12V TO CN511 TO FW541 0V NC AGND NC FOR DEVICE KEY WRITING NC DVDPWR WITH MIC QGF1205C1- 05 WITHOUT MIC 0.1V 4.8V 4.8V 0V 4.8V 0.1V 0.4V 0V 0V 0V 3.4V 4.8V NC NC AVCO BGND AVCI 4.7V 4.7V 4.6V 4.8V 4.8V 0V 0V 0V 0V 0V 0V 5.0V 12.6V NC 0V 0V 0V 10k 10kXX X S77 8.2K 10K U1 10k 27k8.2k U3 10k 10k 10K 10 X 10k X10k X 15K 10K 10k U1 X 27k E 10k X 10k 10k NC AGND TO FW403 TO FW901 (SHEET 1) TO FW902 (SHEET 1) TO CN701 (SHEET 8 ) TO CN1 (SHEET 9) (SHEET 4) (SHEET 4) (SHEET 4) (SHEET 5) (SHEET 6) (SHEET 3) (SHEET 5) (SHEET 5) TO CN702 (SHEET 8) System control section 2-4 SHEET 3 VCR- S/C BLANK- CTL VIDEO- SW VIDEO- MUTE1 VIDEO- MUTE2 VIDEO- YCMIX VIDEO- RGB VIDEO- YCMIX VIDEO- MUTE1 VCR- S/C VIDEO- SW BLANK- CTL VIDEO- MUTE2 VIDEO- YCMIX VIDEO- RGB 17 16 15 BLANK- CTL 2 1 J4402 QNN0572- 001 6 5 4 3 J4403 QNZ0625- 001 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Q4484 KRC102S- X 23 Q4482 KRC102S- X 220 L4391 QQL25CK- 221Z A5V AGND Q4481 KRC102S- X A+12V VS3 VS1 VIDEO- RGB VIDEO-