ViewSonic VA720 Service Manual - Page 23

5 4 3 2 1 +12V rev:C C65 LAYOUT TYPE. +5V +5V +12V REV:D remodify 100uF/DIP 2596-5.0 FB9 FB1070/100M(18121) 2V-BL C71於REV:C更改LAYOUT TYPE ON/OFF 5 ON/OFF 3 GND D JP2 12DC-IN POWER DC-IN F1 5A DC-IN+ FB1270/100M(1812) 70/100M(1812) DC-IN POWER C62 C63 C64 C65 0.1uF 47nF 100uF 100uF U7 1 +VIN VOUT 2 F.B 4 L1 64uH/DIP VOUT FB R40 0 R42 D4 +5V C66 C67 C68 0.01uF 0.1uF 470uF C69 470uF GPIO 0 R38 1K BRI_ADJ/BL R43 33 BL-1 R39 1K B C BRI-1 C60 C61 100uF/DIP 0.1uF GND GND R41 1K BR-2FB11 BR-3 30/100M(0603) Q2 C70 C71 JP3 1 2 3 4 5 6 12V_BL 12V_BL BRI_ADJ BLON/OFF GND GND 2 +5V BAV99 BAV99 BAV99 D5 2 D6 2 D7 D N MMBT3904L 1uF 22uF 3 3 3 E SS34 CGND GND GND GND GND 1 1 1 GND GND GND GND R44 1K BL-2 FB13 BL-3 REV:D +5V remodify +3.3V_DVDD REV:D remodify R45 U7A 0 PBIAS BLON/OFF B R46 2K C Q3 MMBT3904L 30/100M(0603) C72 C73 1uF 0.01uF INVERTER CON +5V GND GND GND E 470uF U8 AIC1084-33 100uF/DIP HEAT SINKA GND GND GND GND 3 VIN VOUT VOUT 2 4 C74 BAV99 BAV99 BAV99 BAV99 BAV99 BAV99 BAV99 1 GND C75 C76 C77 C78 0.1uF 100uF/DIP 0.1uF 100uF/DIP R47 REV:A至REV:B POWER PLACEMENT 0.1uF 2 D8 2 D9 2 2 2 D10 D11 D12 D13 D14 2 2 REV:D N 3 3 3 3 3 3 3 remodify GND GND GND GND GND GND C79 D17 D17 1N4001(1812) 1 1 1 1 1 1 1 1 2 0.01uF U9 1117-2.5 REV:D +5V +5V GND GND GND GND GND GND GND +2.5V_VDD remodify GND 3 VIN VOUT VOUT 2 4 100uF/DIP E C80 C81 Q4 CN4 1 GND C REV:D remodify 470uF 100uF/DIP0.1uF GND GND GND +5V +5V R51 R52 10k 10k C83 0.1uF GND C82 100uF/DIP R48 N GND R53 R54 2k 2k PD/AUDIO MUTE/AUDIO AUDIO+5VCC GREEN/LED RED/LED U10A B MMBT3906L C E B Q5 GREEN GR+ FB16 MMBT3906L R49 RED 680 RE+ FB18 C R50 680 AUDIO+5VCC 30/100M(0603) 30/100M(0603) GEE+ REE+ C84 1uF GND C85 1uF GND VOL-UP/KEY VOL-DOWN/KEY MUTE/KEY MENU/KEY SELECT/KEY UP/KEY DOWN/KEY FB1430/100M(0603) FB1530/100M(0603) FB1730/100M(0603) FB1930/100M(0603) FB2030/100M(0603) FB2130/100M(0603) FB2230/100M(0603) VOL-UP 1 VOLUP C VOLDOWN 2 VOLDOWN VOLUMTE 3 VOLMUTE MENU 4 MENU ENTER 5 ENTER UP 6 UP DOWN 7 DOWN C R56 HEAT SINKB C86 C87 8 AMBER GPO 2 R55 1k C B Q6 MMBT3904L E AUDIO+5VCC U10 1k 1uF/0603 1uF/0603 POWER/KEY FB23 30/100M(0603) 9 GREEN POWER-KEY 10 POWER GPO 1 R58 1k B Q7 GND AUDIO+5VCC MMBT3904L E GND C95 0.1uF 2 2 BAV99 BAV99 D15 D16 REV:A C95與R62 REV:B修正 AGND 3 3 R57 N AGND AUDIO_VOLUME R62 R63 R64 20K N N GAIN-SEL RIGHT-DOCK RIGHT-IN BEEP-IN LEFT-IN R67 LEFT-DOCK 20k 1 2 3 4 5 6 7 8 9 10 11 12 13 14 GND Shutdown Gain Select Mode Mute Vdd DC Vol GND Right Dock Right In Beep In Left In Left Dock GND AGND AGND Right Out+ Vdd Right OutRight Gain2 Right Gain1 GND Bypass HP Sense GND Left Gain1 Left Gain2 Left OutVdd Left Out+ 28 27 26 25 24 23 22 21 20 19 18 17 16 15 RIGHT_OUT+ RIGHT_OUT- RIGHT-GAIN2 RIGHT-GAIN1 R59 BYPASRS60 13k/1206 LLEEFFTT--GGAAIINN12LEFTR_6O5U13Tk-/1R26066 LEFT_OUT+ RIGHT-GAIN3 20k/1206 R61 C96 20K/1206 0.068uF 20k/1206 LEFT-GAIN3 C88 0.01uF C89 C90 0.01uF 0.01uF GND GND C91 0.01uF GND C92 C93 C94 0.01uF 0.01uF 0.01uF GND GND GND GND 11 GND GND OSD CON 1 1 AGND AGND AGND C97 R68 PC-AUDIOR1 C99 LM4838 C100 B J1 AGND R69 20k 0.33uF 10uF/16v C101C102 C103 20K/1206 0.068uF B 1 PC-AUDIOR 0.1uF 0.1uF 1uF/0603 +DDC5V+5V D21 DAN202U 2 3 PC_Audio FB25 30(0603) AGND PC-AUDIOG PC-AUDIOL R70 0 AGND PC-AUDIOL1 R71 20k R72 20k C104 0.33uF +5V R75 +5V AGND R74 20k FB24 70/100M(1812) U11 AUDIO5V 1 2 3 4 S1 S2 S3 G1 D1 D2 D3 D4 8 7 6 5 C108 SI4433ADY 10uF AUDIO5VP FB26 70/100M(1812) C105 R73 0.1uF 1K AUDIO+5VCC C106 C107 10uF RIGHT_OUT+ RIGHT_OUTLEFT_OUTLEFT_OUT+ 220uF JP4 1 2 3 4 speaker_out 1 3 2 R78 10K R79 10K 5V_VGA AUDIO_VOLUME R76 2k VOL/CT 510 VOL/CTRL AUDIOCTL C AGND AGND AGND AUDIO-A C109 C110 2.2uF/0805 Q8 B R77 1k GPIO 1 R80 U12 0.1uF MMBT3904L MTG1 THROUGH HOLE-AMTG2 THROUGH HOLE E 2K 1 2 3 4 A0 A1 A2 GND VCC WP SCL SDA 8 7 6 5 GND DDC-SCL DDC-SDA A 24C21 WP R81 100 R82 100 GND VGA-SCL VGA-SDA GND GPO 0 R83 1k POWER/AUDBIO Q9 C MTG3 THROUGH HOLE MTG4 THROUGH HOLE MTG5 THROUGH HOLE 1 2 3 1 2 3 1 2 3 4 12 4 12 4 12 1 3 2 4 12 5 11 6 10 1 A GND MMBT3904L 5 11 5 11 5 11 E 9 8 7 ANALOG DDC 24C02 use 30/100M(0603) 6 10 6 10 6 10 R85 FB27 GND 7 8 9 7 8 9 7 8 9 GND FB28 70/100M(1812) GND R84 0 R85 0 24C21 use GND R84 A-VS FB29 GND 30/100M(0603) AGND GND GND GND 5 4 3 2 1 ViewSonic Corporation Confidential - Do Not Copy VA720-2 20