Acer SPECTRUM AL801 Скачать руководство пользователя страница 27

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40L 152512

RECYCLE LABEL

0.0000 PCS

40L 180786 1A

ID LABEL

1.0000 PCS

40L 457716 1A

TCO99 LABEL

1.0000 PCS

40L 459786 1A

CARTON LABEL

1.0000 PCS

40L 581 26704

FOR CARTON/PALLE

0.0500 PCS

41L 68508 A

Connalation card　

0.2000 PCS

41L1800786 1A

MANUAL

1.0000 PCS

41L7800786 1A

WARRANTY BOOKLET

1.0000 PCS

41L7800786 2A

TCO'99 CARD

1.0000 PCS

44L3231 14

EVA WASHER

1.0000 PCS

44L3234786 1A

CARTON

1.0000 PCS

44L3715 1

EPS(L)

1.0000 PCS

44L3715 2

EPS(R)

1.0000 PCS

44L6000 4 6B

SPACE PAPER

0.0100 PCS

44L9003 9

CORNER PAPER

0.0980 PCS

44LLCDK 2

CUSHION FOR BASE

1.0000 PCS

45L 76 28 RN

pe bag for base/MANUAL

1.0000 PCS

45L 77 3

TRANSPARENT SHEET

73.0000 CM

45L 77500

BARCODE RIBBON

19.0000 CM

45L 77501

BARCODE RIBBON

0.5000 CM

45L 88500 11

OUT PE BAG

0.0098 PCS

45L 88500 12

OUT PE BAG

0.0150 PCS

45L 88607

PE BAG FOR MONITOR

1.0000 PCS

50L 500 1

CABLE TIE

2.0000 PCS

50L 600 2

HANDLE1

1.0000 PCS

50L 600 3

HANDLE2

1.0000 PCS

52L 1150 C

WHITE TAPE

85.0000 MM

52L 1185 22

ACER TYPE

12.0000 CM

52L 1186

SMALL TAPE

8.0000 CM

52L6020 3

PROTECT FILM

0.1000 PCS

79L L18 1 E

INVERTER BY EMAX

1.0000 PCS

80L L17 2 CH

ADAPTER VER　　

1.0000 PCS

85L 548503

SHIELD

1.0000 PCS

85L 574 1

SHIELD INVERTER

1.0000 PCS

89L1735GAB504

SIGNAL CABLE

1.0000 PCS

89L404C15N IS

POWER CORD

0.0000 PCS

89L404C15N YH

POWER CORD

1.0000 PCS

95L8014 6 14

HARNESS

1.0000 PCS

95L8018 30 4

HARNESS

1.0000 PCS

B1L1030 5128

SCREW

5.0000 PCS

B1L1030 8128

SCREW

4.0000 PCS

M1L 330 6128

SCREW

8.0000 PCS

M1L1030 10128

SCREW

4.0000 PCS

M1L1740 12128

SCREW

4.0000 PCS

Содержание SPECTRUM AL801

Страница 1: ...SERVICE MANUAL SPECTRUM Series LCD Monitor AL801 Acer ...

Страница 2: ...RY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RE LIABILITY FOR CHANGES ERRORS OR OMISSIONS MANUFACTURE DATA Mar 08 2003 REVISE Mar 17 2003 ...

Страница 3: ...JUSTMENT CONDITIONS AND PRECAUTIONS 7 4 2 ADJUSTMENTS METHOD DESCRIPTION 7 8 4 3 FRONT PANEL CONTROL KNOBS 9 5 CIRCUIT SOFTWARE DESCRIPTION 10 5 1 SPECIAL FUNCTION WITH PRESS KEY 10 5 2 CIRCUIT FUNCTION DESCRIPTION 10 11 5 3 SOFTWARE FLOW CHART 12 6 A INTERFACE BOARD TROUBLE SHOOTING CHART 14 21 B INVERTER MODULE SPEC TROUBLE SHOOTING CHART 22 26 7 MECHANICAL OF CABINET FRONT DIS ASSEMBLY 27 8 PAR...

Страница 4: ...rmination impedance 75 OHM 5 Scanning Frequencies Horizontal 30 KHz 80 KHz Vertical 55 Hz 75 Hz Pixel clock 135 MHz 6 Factory Preset Timing 18 User Timings 19 Input signal tolerance H tolerance 1 K V tolerance 1 Hz 7 Power Source Switching Mode Power Supply AC 100 240 V 50 60 Hz Universal Type 8 Operating Temperature 0 50 Ambient Non operating Temperature 20 60 9 Humidity Operating 20 to 80 RH non...

Страница 5: ...rive the backlight of panel The Adapter will provides the 12V DC power 4 16 Amp to Main board and Inverter module Monitor Block Diagram 1 3 Interface Connectors A AC Power Cable B Video Signal Connectors and Cable C External Adapter Inverter Flat Panel and CCFL backlight Main Board or Interface Board Keyboard RS232 Connector For white balance adjustment in factory mode ADAPTER HOST Computer CCFT D...

Страница 6: ...e power is turn off 2 Please do not change variable resistance settings in MAIN BOARD they are adjusted to the most suitable value If they are changed it might happen LUMINANCE does not satisfy the white balance spec 3 Please consider that LCD backlight takes longer time to become stable of radiation characteristic in low temperature than in room temperature 4 Please pay attention to displaying th...

Страница 7: ...ensure firm grounding The connector information is as follow 15 Pin Color Display Signal Cable PIN NO DESCRIPTION PIN NO DESCRIPTION 1 RED 9 5V power from VGA card 2 GREEN 10 GND 3 BLUE 11 SYNC GND 4 GND 12 SDA 5 GND 13 HORIZ SYNC 6 GND R 14 VERT SYNC 7 GND G 15 SCL 8 GND B 3 Apply power to the display by turning the power switch to the ON position and allow about thirty seconds for Panel warm up ...

Страница 8: ...Chroma 7120 MEM Channel 1 to C2 color and MEM channel 2 to C1 color our C2 parameter is x 302 20 y 319 20 Y 200 20cd m2 and C1 parameter is x 313 20 y 329 20 Y 200 20 cd m2 How to setting MEM channel you can reference to chroma 7120 user guide or simple use SC key and NEXT key to modify x yY value and use ID key to modify the TEXT description Following is the procedure to do white balance adjust P...

Страница 9: ... 7800 on OSD window to save the adjustment result b adjust C1 color temperature 1 Set the Contrast of OSD function to 45 and Adjust Brightness to chroma 7120 Y 240 5 cd m2 2 Switch the chroma 7120 to RGB mode with press MODE button 3 switch the MEM channel to Channel 02 with up or down arrow on chroma 7120 4 The lcd indicator on chroma 7120 will show x 313 10 y 329 10 Y 200 5 cd m2 5 Adjust the Co...

Страница 10: ... Position adjustment Set the Chroma to pattern 1 crosshatch pattern or WIN98 95 full white pattern confirm above item 2 3 functions clock focus was done well if that 2 functions failed the H V position will be failed too Adjust the four edge until all four edges are visible at the edge of screen 5 LANGUAGE function There are 5 language for selection press MENU to selected and confirm press LEFT or...

Страница 11: ...ages to convert analog RGB data to digital data with interpolation process zooming generated the OSD font perform overlay function and generate drive timing for LCD PANEL 2 U302 W78E65 WINBOND MCU type 8052 series with 64k Rom size and 512 byte ram Use for calculate frequency pixel dot detect change mode rs232 communication power consumption control OSD index warning etc 3 U203 24LC21 MicroChip IC...

Страница 12: ...y 30K 80Khz 5 6mA 13mA GMZAN2 U200 LVDS chip U601 U602 Panel Power Control U202 MCU U302 Data Digital RGB Panel Control Signal Phs Pvs PclkA B Pdispe Panel Power 5V Communication signal Hclk Hfs Hdata0 Input analog RGB H V ddc signal Rs232 communication Oscillator 50 mhz Crystal 20 MHz DDC chip PANEL Main board Block diagram INVERTER module Keyboard module EXTERNAL ADAPTER DC 12V 4 16Amp ...

Страница 13: ...he data with backup value Initial GMZAN2 Yes POWER ON START Initial MCU I O Interrupt vector Ram Initial 1 POC backlight counter 2 Clr all mode value Yes Check if in Factory mode when power on press the MENU Button will be in FACTORY mode SET factory mode flag Check Previous power switch status from Eeprom other system status MAIN SUBROTINE LOOP No Check Eeprom is empty Clear factory mode flag No ...

Страница 14: ...le Out of range input not support be confirm Set mode index parameter Set change mode flag No No Yes Yes confirm the frequency Hsyn or Vsyn from IFM already been changed check the change mode flag Process turn off OSD setting GMZAN2according to above parameter set LED status set backlight status Check Auto config mode flag already been set No Do Auto config automatically Read Key status and Proces...

Страница 15: ...Check Panel Power Circuit Block Check U200 Data output Block OK Panel Power OK Replace Inverter and Check Inverter control relative circuit Re do White balance adjust OK U200 data OK Check Power switch is in Power on status and check if Power switch had been stuck Measured RGB r200 r201 r202 H V Input at U401 pin 9 4 was there have signal Measured Oscillator Block Oscillator U201 Crystal X300 Chec...

Страница 16: ...ES still no screen Check the Bklt On relative circuit R315 Q304 R311 In normal operation when LED green R315 Bklt On should 0 v If Bklt On no response when the power switch turn on off Replace the MCU NG OK Re do white balance OK Measured U201 Oscillator output R215 50MhZ Replace Oscillator U201 NG no transition OK has transition Measured X300 Crystal output R340 20MhZ Replace Crystal X300 NG no t...

Страница 17: ...8 must be 5V Yes tight enough Yes Voltage normal Check the LVDS Power L601 L602 L603 L604 L900 3 3V Check the both U601 U602 LVDS Input pin 31 45mhz 65mhz and pin 27 Vsyn freq pin 28 45khz 65 khz Yes Voltage normal Yes Frequency normal Replace both LVDS chip U601 U602 Tighten it NG Check U904 which convert the 5V to 3 3V Check U200 DATA OUPUT block as above page 16 NG Check OSCILLATOR Block as abo...

Страница 18: ... relative reset circuit and crystal OK Check U302 MCU pin 43 42 41 40 39 at High state 5V without press any key Mechanical was stuck Check NG NG If still no Led green indicator check Q102 R106 LED at keyboard cold solder or bad NG MCU no response Check U302 pin 20 20MHz and pin 44 VDD 5V and pin 10 reset 0V at normal condition If one of this item was NG check the relative circuit NG Without press ...

Страница 19: ...eans all 3 3v is no load U200 Gmzan2 was shut down and only U302 MCU still working that means the monitor is in power saving status all power system is working well OK Check U304 pin 2 is a stable rectangle wave Around 150k 158kHz stable rectangle wave with equal duty without any spike or harmonic pulse OK NG with harmonic pulse Check U304 pin 2 is a unstable rectangle wave The interface board pow...

Страница 20: ...g is not quite well Does your noise only exist in one mode only ex only at 1280x1024 75 Hz other is normal OK OK Yes has extension NG interferences still exist NG NO additional extension cable That was cause by you VGA CARD setting your VGA card timing back porch front porch exceed vesa timing too far for some new AGP VGA CARD such situation always happened So in your control panel icon select mon...

Страница 21: ... the center of panel Set Contrast brightness maximal RGB 50 Quit from OSD screen measured Y luminance With chroma 7120 check Y 240 10 cd m2 NG If the Y less than 200 cd m2 after the contrast brightness max then change the LAMP of panel If Y can reach 240 cd m2 that means The lamp still working well so we just re do the white balance process As following procedure OK Use white pattern press MENU bu...

Страница 22: ...MODEL NO SM02B BHSS 1 TB PIN SYMBOL DESCRIPTION 1 HV OUTPUT Input H V to lamps 2 RETURN Return to control C FUNCTION SPECIFICATIONS The data test with the set of SAMPO DC TO DC CONVERTER ROOM TEMPERATURE 25 4 ITEM SYMBOL MIN TYP MAX UNIT REMARK Input voltage Vin 10 8 12 13 2 V Input current Iin 2100 2500 mA output current adj 0v min Iout min 2 3 2 6 3 3 mA FOR 1 CCFL LOAD 120KΩ Output current adj ...

Страница 23: ...22 D FUNCTION TEST CIRCUIT CON1 1 2 3 4 5 120KΩ 120KΩ 120KΩ 120KΩ 10Ω 10Ω 10Ω 10Ω VT 181 1 2 1 2 VT 181 VT VT 1 2 1 2 CON2 CON3 CON4 CON5 ...

Страница 24: ...FUSE F1 Vin 12 TO CHANGED F1 4 0A 63V TO CHECKED Q4 Q6 VOUT 9V TO CHECKED L1 L2 INPUT 9V TO L1 OR L2 TO CHANGED CH1 Q4 Q3 Q11 CH2 Q5 Q6 Q12 TO CHANGED CH1 Q7 Q8 D12 PT1 CH2 Q9 Q10 C13 PT2 FUNCTION TEST OK 1 SHORT R30 OPEN LOAD 2 TEST PT1 OR PT2 OUTPUT PIN 7 H V VOLTAGE Vh 1600 100V rms TO CHANGE ON PT1 OR PT2 FUNCTION TEST OK ...

Страница 25: ...CK PWM FREQUNCY AT C6 CHIP THE OSCILLATOR FREQUNCY RANGE 150 250 KHZ TO CHANGE C6 CHIP OR IC CHIP FUNCTION TEST OK IF ENABLE ABNORMALITY 1 TO CHECK IC PIN 9 TURN ON HAVE 12 VOLTAGES TO CHANGE ON Q1 Q2 FUNCTION TEST OK IF DIMMING ABNORMALITY TO CHECK R1 R2 R33 C6 IS FAILD TO CHANGE ON R1 R2 R33 C6R203 FUNCTION TEST OK ...

Страница 26: ... PCS 7L 1 29 WOODEN PALLET 0 0150 PCS 7L 1 30 WOODEN PALLET 0 0980 PCS 15L5684501 MAIN FRAME 1 0000 PCS 15L5689 1 A GND LUG AL 2 0000 PCS 15L5689 2 A GND CLAMP 1 0000 PCS 33L4060 CA L CABLE COVER 1 0000 PCS 33L4320 CA L SCREW COVER 2 0000 PCS 33L4343 1 POWER LENS 1 0000 PCS 33L4361 CB 2L KEY PAD 1 0000 PCS 34L 757 CA 2B BACK COVER 1 0000 PCS 34L 895 CA B ARM COVER 1 0000 PCS 34L 957ACA B FRONT PAN...

Страница 27: ...500 BARCODE RIBBON 19 0000 CM 45L 77501 BARCODE RIBBON 0 5000 CM 45L 88500 11 OUT PE BAG 0 0098 PCS 45L 88500 12 OUT PE BAG 0 0150 PCS 45L 88607 PE BAG FOR MONITOR 1 0000 PCS 50L 500 1 CABLE TIE 2 0000 PCS 50L 600 2 HANDLE1 1 0000 PCS 50L 600 3 HANDLE2 1 0000 PCS 52L 1150 C WHITE TAPE 85 0000 MM 52L 1185 22 ACER TYPE 12 0000 CM 52L 1186 SMALL TAPE 8 0000 CM 52L6020 3 PROTECT FILM 0 1000 PCS 79L L1...

Страница 28: ... 3 0000 G 51L6002 2 ACCELERANT 0 0000 ML 55L 100600 A SOLDER WIRE 0 5000 G 55L 100603 SOLDER 9 1000 G U302 56L1125137M22 W78E65 by Winbond 1 0000 PCS C307 67L305L331 6 330UF 20 35V 1 0000 PCS C309 67L305L331 6 330UF 20 35V 1 0000 PCS C310 67L305L331 6 330UF 20 35V 1 0000 PCS C312 67L305L331 6 330UF 20 35V 1 0000 PCS C945 67L309L471 3 470UF 20 16V 1 0000 PCS FB301 71L 55 28 FERRITE BEAD 7 62 5 08 1...

Страница 29: ...0 CHIPR 0OHM 5 1 16W 1 0000 PCS R317 61L0603000 CHIPR 0OHM 5 1 16W 1 0000 PCS R340 61L0603000 CHIPR 0OHM 5 1 16W 1 0000 PCS R401 61L0603000 CHIPR 0OHM 5 1 16W 1 0000 PCS R402 61L0603102 CHIPR 1K OHM 5 1 16W 1 0000 PCS R403 61L0603472 CHIPR 4 7K OHM 5 1 16W 1 0000 PCS R603 61L0603000 CHIPR 0OHM 5 1 16W 1 0000 PCS R200 61L0603101 CHIPR 100 OHM 5 1 1 1 0000 PCS R201 61L0603101 CHIPR 100 OHM 5 1 1 1 0...

Страница 30: ... PCS C953 65L0603102 32 CHIP 1000PF 50V X7R 1 0000 PCS C954 65L0603102 32 CHIP 1000PF 50V X7R 1 0000 PCS C955 65L0603102 32 CHIP 1000PF 50V X7R 1 0000 PCS C956 65L0603102 32 CHIP 1000PF 50V X7R 1 0000 PCS C957 65L0603102 32 CHIP 1000PF 50V X7R 1 0000 PCS C229 65L0603103 32 0 01UF 10 50V X7R 1 0000 PCS C230 65L0603103 32 0 01UF 10 50V X7R 1 0000 PCS C231 65L0603103 32 0 01UF 10 50V X7R 1 0000 PCS C...

Страница 31: ...00 PCS C304 65L0603104 12 0 1UF 10 16V X7R 1 0000 PCS C308 65L0603104 12 0 1UF 10 16V X7R 1 0000 PCS C311 65L0603104 12 0 1UF 10 16V X7R 1 0000 PCS C405 65L0603104 12 0 1UF 10 16V X7R 1 0000 PCS C601 65L0603104 12 0 1UF 10 16V X7R 1 0000 PCS C602 65L0603104 12 0 1UF 10 16V X7R 1 0000 PCS C604 65L0603104 12 0 1UF 10 16V X7R 1 0000 PCS C618 65L0603104 12 0 1UF 10 16V X7R 1 0000 PCS C619 65L0603104 1...

Страница 32: ...JIG601 T17A 1 0000 PCS L201 71L 57G601 TI3216JIG601 T17A 1 0000 PCS L202 71L 57G601 TI3216JIG601 T17A 1 0000 PCS L203 71L 57G601 TI3216JIG601 T17A 1 0000 PCS L300 71L 57G601 TI3216JIG601 T17A 1 0000 PCS L900 71L 57G601 TI3216JIG601 T17A 1 0000 PCS L601 71L 59B121 TB160808B12 SMD 0 0000 PCS L602 71L 59B121 TB160808B12 SMD 0 0000 PCS L603 71L 59B121 TB160808B12 SMD 0 0000 PCS L604 71L 59B121 TB16080...

Страница 33: ... PCS D204 93L 64 32 LL4148 SMD 0 0000 PCS D205 93L 64 32 LL4148 SMD 0 0000 PCS D206 93L 64 32 LL4148 SMD 0 0000 PCS D207 93L 64 32 LL4148 SMD 0 0000 PCS D301 93L 64 32 LL4148 SMD 0 0000 PCS D302 93L 64 32 LL4148 SMD 0 0000 PCS D202 93L 6432U MLL4148 SMD 0 0000 PCS D203 93L 6432U MLL4148 SMD 0 0000 PCS D204 93L 6432U MLL4148 SMD 0 0000 PCS D205 93L 6432U MLL4148 SMD 0 0000 PCS D206 93L 6432U MLL414...

Страница 34: ...23 TIN COATED 0 0000 PCS J101 61L 60210252T CFR 1K OHM 5 1 6W 1 0000 PCS R101 61L 60210352T CFR 10K OHM 5 1 6W 1 0000 PCS R102 61L 60210352T CFR 10K OHM 5 1 6W 1 0000 PCS R103 61L 60210352T CFR 10K OHM 5 1 6W 1 0000 PCS R104 61L 60210352T CFR 10K OHM 5 1 6W 1 0000 PCS R105 61L 60210352T CFR 10K OHM 5 1 6W 1 0000 PCS R106 61L 60210352T CFR 10K OHM 5 1 6W 1 0000 PCS R107 61L 60210352T CFR 10K OHM 5 ...

Страница 35: ...00V 30K 80KHz Current 14mA Main board power system LM2596S 5 12V to 5V 5A SPEC 5V To CPU Eeprom 24c21 control inverter on off 860mA when Cable not Connected 841mA when Normal operation To Hyundai 300 Panel around 1450mA AIC1084 5V to 3 3V 5A SPEC 3 3V for GMZAN2 consumption LT1117 5V to 3 3V 800mAspec for LVDS consumption RT9164 5V to 2 5V 800mA SPEC for GMZAN2 consumption 3 3V 2 5V ...

Страница 36: ...AIN PCB LAYOUT Gmzan2 LVDS Keyboard connector Inverter connector MCU Panel Power Control AIC1084 5V to 3 3v LVDS power LT1117 5V to 3 3v LM2596 convert 12V to 5V Input Connector DDC chip RT9164 5V to 2 5v Audio connector ...

Страница 37: ...e Size Document Number Rev Date Sheet of RT9164 2 5V CRYSTAL2 50MHZ OUT VCC 2 5V 3 3V LM2596 5 0V 5 0V 12V 5V 5V 5V 3 3V ZAN2 SCALER TCLK1 3 3V MFB2 MFB7 MFB8 MFB9 HCLK HFS IRQ HDATA0 RST RST1 MFB1 PDISPE PVS PHS PCLK OBLU OGRN ORED EBLU EGRN ERED 2 5V BLUE RED GREEN HSYNC CS VSYNC LVDSEN TCLK AIC1084 3 3V 3 3V EEPROM 24LC21A SDA SCL VCC 5V CRYSTAL1 20MHZ X1 X2 LVDS1 NT7181 ERED 0 7 EGRN 0 7 EBLU ...

Страница 38: ...SCAN_OUT1 SCAN_OUT2 CVSS1A C251 10nF ADC AGND D5V R200 0 PD19 GND B2 5V VGA_HSYNC PCLKB PD 0 47 C232 10 nF DDC_SDA PD34 PD4 PD0 DVDDA R326 10 K R225 10K R317 0 L204 0 1 2 U905 RT9164 3 1 2 IN ADJ OUT PVS R208 0 C203 100uF GND 3 3V 2 5V SVDDA LVDS EN VDDA ADC AGND C223 0 1 uF R229 0 RXD GND D5V R207 0 PHS RVDDA PGND TCLK ADC AGND D5V R327 10 K IRQ GND GND VGA_SDA PD28 L200 600 1206 1 2 R218 100 R C...

Страница 39: ...N26 TXOUT3 TXOUT3 PD40 L601 BEAD 120 EVEN GND PD13 PD37 TXE0 TXO5 L602 BEAD 120 PD36 TXO3 TX0 O TXE7 TX1 O PD47 PD45 D5V TX3 O TXE2 PD 30 35 TX2 E PD39 PD1 10uF 16V C607 C604 0 1uF PD37 TXO8 C608 0 01UF PD29 TXO8 PD33 PD 24 29 AVDD_3 3 AVDD_3 3 PD19 TXO6 TXO4 PD36 TXO0 TXE1 PD2 C602 0 1uF PD8 PD35 AVDD_3 3 TXE3 TXE7 TXE1 TXE9 PD 12 17 ADC GNDA TXE4 PD4 TX3 O PD21 PD42 PD12 R605 R PD9 TXO2 TXE5 PCL...

Страница 40: ...1 uF CN304 HEADER 6 1 2 3 4 5 6 5V 5V 12V R328 10 K RST 5V BKLT PWM C401 100uF OP R303 4 7K R238 0 OP GND VR501 10 K W R237 0 OP 5V 5V CN302 HEADER 9 1 2 3 4 5 6 7 8 9 HDATA0 GND SCL R239 4 7K OP GND HFS R321 0 OP R313 10 K U302 8XC51 PLCC 35 2 3 4 5 6 7 8 9 44 22 24 25 26 27 28 29 30 31 32 33 36 37 38 39 40 41 42 43 1 12 23 34 20 21 10 11 13 14 15 16 17 18 19 EA VP T2 P1 0 T2EX P1 1 P1 2 P1 3 P1 ...

Страница 41: ...2596S 5 0 TO263 1 5 4 3 2 VIN ON FBK GND Vout C945 470uF 16V GND C312 330 uF 35V C310 330 uF 35V CN301 12V POWER GND TP700 GND 1 D300 B320 R905 0 C311 0 1 uF TP703 GND 1 Distribute throughout digital Gnd plane R903 1K OP GND C941 0 1 uF L905 CHOKE A5V 5V R904 0 OP 5V GND R902 3K OP 3 3V T300 33 uH GND GND TP701 GND 1 C308 0 1 uF U305 AIC 1084 1 2 3 GND Vout Vin 12V TP702 GND 1 POWER Block ...

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