ViewSonic VG712b Service Manual Download

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5V_MAIN=2.5A

3.3V_MAIN MAX 5A

(GM5120)

LESR

GM5120

Thursday, July 10, 2003

POWER

Title

Size

Document Number

Rev

Date:

Sheet

BRI

Volume-

BLON

PNL_EN

BRIGHT

+5V

+3.3VD

+2.5VD

2.5V_VDD

2.5V_AVDD

3.3V_AVDD

+3.3VA

3.3V_DVDD

+5V

+12V

+5V

+3.3VA

VPL

+5V

+12V

+3.3VD

+5VIN

+3.3VD

+12V

+12VIN

+3.3VD

+5VIN

+12V

+2.5VD

+12V

+5V

JP13

2 HEADER

C181

0.1uF

SOT

MOSN

Q5
SI2302DS

Power MOSN
NMos

C183

0.1uF

C182

0.1uF

C152

0.1uF

R133

100K

C205

100uF/10V

C204

0.1uF

Q6
2N3904

C184

0.1uF

C141

0.1uF

C140

0.1uF

C16

0.1u

C15

100uF/16V

C18

0.1u

SOT

MOSN

Q1
SI2302DS

Power MOSN

NMos

0.1uF

JP2

BNC-2

0.1uF

1000uF/16V

C32

100uF/16V

C37
0.1uF

10K

120uF/16V

C38
NC/0.1uF

C36
NC/0.1uF

C14

100uF/16V

C17

NC/0.1uF

0.1uF

10K

BEAD 0805

120uF/16V

C177

NC/100pF

C28

0.1uF

C24

0.1uF

C23

0.1uF

330/1%

150uH

C27

1000uF/10V

C26

0.1uF

C155

0.1uF

C11

0.1uF

C178

NC/100pF

100uF/16V

200/1%

C10

0.1uF

330/1%

22uH

IN5822

C149

0.1uF

330/1%

C39

0.1uF

C12

100uF/16V

C33

0.1uF

AP1501

+VIN

VOUT

VOS

S.S

GND

C21

0.1uF

R112
10K /NC

JP3

HEADER 10-2.0

1
2
3
4
5
6
7
8
9
10
11
12
13
14

C22

100uF/16V

C29

100uF/16V

U3
AIC1084

VIN

VOUT

GND

C25

100uF/16V

0.1uF

R10
100K

Q2
2N3904

L14

BEAD /0805

C35

0.1uF

C34

1000uF/10V

L10

BEAD /0805

R11

750R

22uH

JP1

CIRDIN_4-R

C154

0.1uF

R12
10K

L11 NC

U2
XC6201

GND

L12

BEAD /1206

C20

120uF/16V

U6A
74LVC14

C19

100uF/16V

22uH

C13

NC/0.1uF

C31
NC/0.1uF

IRF7204

1
2
3
4

6
5

NC
S
S
G

D
D

100K

C148

0.1uF

U1
AIC1084

VIN

VOUT

GND

C147

0.1uF

C151

0.1uF

C150

0.1uF

C146

0.1uF

C30

R131

R132

100K

JP15

4 HEADER

1
2
3
4

C145

0.1uF

R100

R101

R102

0/NC

C144

0.1uF

R114

R113

R116

C17

NC/0.1uF

C153

0.1uF

C179

0.1uF

C171

0.1uF

C172

0.1uF

C180

0.1uF

10. Schematic Diagrams

ViewSonic

Corporation

nfidential

Not

Copy

VG712s/b

Summary of Contents for VG712b

Page 1: ...Model No VLCDS23719 6W 7W 17 Color TFT LCD Display Service Manual ViewSonic VG712s b 1 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 VG712s b_SM_835_1b Rev 1b Oct 2004...

Page 2: ...y particular purpose Further ViewSonic reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of ViewSonic to notify any person o...

Page 3: ...ouble Shooting Flow Chart 9 Block Diagram 10 Schematic Diagrams 7 Recommended Spare Parts List 1 Precautions and Safety Notices 5 Adjusting Procedure 8 Exploded Diagram And Spare Parts List 11 PCB Lay...

Page 4: ...onditions Extremely hot cold or humid environment Areas susceptible to excessive dusts and dirt Near any appliance generating a strong magnetic field Place in direct sunlight 2 Caution No modification...

Page 5: ...far ends of the CFL Reflector edge softly Otherwise the TFT Module may be damaged 10 At the insertion or removal of the Signal Interface Connector be sure not to rotate nor tilt the Interface Connecto...

Page 6: ...ront cover of the monitor Do not touch the surface of the polarizer Surface of the LCD panel is pressed by fingers and that will probably cause Mura Take out the monitor with cushions Take out the mon...

Page 7: ...oam pad Place the monitor on foreign objects That will probably scratch the surface of the panel or cause Mura The panel is placed facedown on the lap That will probably cause Mura 4 ViewSonic Corpora...

Page 8: ...Exclusions Not compatible with interlaced video 3 Power Power Supply Power Supply Adapter Part Number LSE 0107A1240 Input Voltage Range 90 to 264 VAC Over Current Protection 12 7V 18V full load Power...

Page 9: ...56Hz 35 1KHz 800 x 600 60Hz 37 9KHz 800 x 600 75Hz 46 9KHz 800 x 600 72Hz 48 1KHz 800 x 600 85Hz 53 7KHz 832 x 624 75Hz 49 7KHz 1024 x 768 60Hz 48 4KHz 1024 x 768 70Hz 56 5KHz 1024 x 768 72Hz 58 1KHz...

Page 10: ...yp Backlight lamps 4 CCFL backlight lamps Backlight Life 50 000 Hours Typ 45 000 hours Min 7 Mechanical Dimensions Width 378 mm 14 9 inch Height 405 mm 16 0 inch Depth 177 mm 7 0 inch Monitor Weight 5...

Page 11: ...6 A3 57 4A 30 9C 23 12 4F 54 BF EF 80 81 80 40 61 59 45 59 31 59 01 01 01 01 50 01 01 01 01 30 2A 00 98 51 00 60 2A 40 30 70 13 00 52 0F 11 00 70 30 00 1E 00 00 00 FF 00 50 33 55 80 30 34 30 31 30 30...

Page 12: ...I 720 X 400 70Hz IBM VGA 640 X 480 60Hz IBM VGA 640 X 480 67Hz Apple Mac II 640 X 480 72Hz VESA 640 X 480 75Hz VESA 800 X 600 56Hz VESA 800 X 600 60Hz VESA 36 ESTABLISHED TIMING II 800 X 600 72Hz VES...

Page 13: ...th 3 lines Border 0 lines Frequency 60 02 Hz Digital Separate Horizontal Polarity Vertical Polarity ______________________________________________________________________ 72 89 Detailed Timing Descrip...

Page 14: ...78 2E C5 C6 A3 57 4A 30 9C 23 12 4F 54 BF EF 80 81 80 40 61 59 45 59 31 59 31 0A 01 01 50 01 01 01 01 30 2A 00 98 51 00 60 2A 40 30 70 13 00 52 0F 11 00 70 00 1E 00 00 00 FF 00 50 33 55 80 30 34 30 31...

Page 15: ...720 X 400 70Hz IBM VGA 640 X 480 60Hz IBM VGA 640 X 480 67Hz Apple Mac II 640 X 480 72Hz VESA 640 X 480 75Hz VESA 800 X 600 56Hz VESA 800 X 600 60Hz VESA 36 ESTABLISHED TIMING II 800 X 600 72Hz VESA 8...

Page 16: ...s Sync Offset 1 lines Sync Pulse Width 3 lines Border 0 lines Frequency 60 02 Hz Digital Separate Horizontal Polarity Vertical Polarity ________________________________________________________________...

Page 17: ...wo controls on some screens Also a shortcut to toggle between analog and digital connections Power light Green ON Orange Power Saving Main Menu with OnView controls Front Control Panel shown below Aud...

Page 18: ...ress button 1 twice The following tips may help you optimize your display Adjust your computer s graphic card so that it outputs a video signal 1280 x 1024 60Hz to the LCD display Look for instruction...

Page 19: ...ge for cooler white used in most office settings with fluorescent lighting 6500K Adds red to the screen image for warmer white and richer red 5400K Adds green to the screen image for a darker color 50...

Page 20: ...Sonic website URL See your graphic card s user guide for instructions on changing the resolution and refresh rate vertical frequency NOTE VESA 1280 x 1024 60Hz recommended means that the resolution is...

Page 21: ...otice allows you to enable or disable this notice If you enable the Resolution Notice shown above and your computer is set at a resolution other than 1280 x 1024 the following screen appears Resolutio...

Page 22: ...control is not pushed within 30 seconds the display screen disappears Memory Recall returns the adjustments back to factory settings if the display is operating in a factory Preset Timing Mode listed...

Page 23: ...ld for 10 seconds Power Lock Unlock User won t be able to turn off the monitor 1 Up hold for 10 seconds OSD Lock Unlock It will lock all functions including Volume and Mute Up Down Power On with signa...

Page 24: ...of driving a 3A load without any additional transistor component The AP1501 operates at a switching frequency of 150KHz and thus allows smaller sized filter components than what would be needed with l...

Page 25: ...ter the device performs chip erase or block erase operation it can be reprogrammed on a byte by byte basis 3 GM5120 The gm5110 20 is a graphic processing IC for Liquid Crystal Display LCD monitors at...

Page 26: ...rogrammed for rising edge or falling edge clocks through a dedicated pin The THC63LVDF84A receiver converts the LVDS data streams back into 28 bits of CMOS TTL data with falling edge clock At a transm...

Page 27: ...40 x 400 60Hz 31 5KHz 3 640 x 400 70Hz 31 5KHz 4 640 x 480 50Hz 24 7KHz 5 640 x 480 60Hz 31 5KHz 6 640 x 480 67Hz 35 0KHz 7 640 x 480 72Hz 37 9KHz 8 640 x 480 75Hz 37 5KHz 9 640 x 480 85Hz 43 27KHz 10...

Page 28: ...n Remark 1 Frequency Tracking Fine Line Moire Eliminate visual wavy noise Figure 1 2 Contrast Brightness 16 Gray Scale 16 gray levels should be distinguishable Figure 2 3 Boundary Horizontal Vertical...

Page 29: ...l Thickness Pattern Figure 3 R Color Pattern Figure 4 G Color Pattern Figure5 B Color Pattern Figure 6 Full White Patter Figure 7 Dark Screen Pattern Figure 8 26 ViewSonic Corporation Confidential Do...

Page 30: ...lect and enter Auto Image Adjust function on Main Menu to see if it is workable The Auto Image Adjust function is aimed to offer a better screen quality by built in ASIC For optimum screen quality the...

Page 31: ...en frame If not readjust by the following steps a Select and enter Manual Image Adjust function on OSD Main Menu b Then select and enter Horizontal Size or Horizontal Vertical Position function to adj...

Page 32: ...splay Modes Test Signal Analog 640 x 350 70Hz 640 x 400 60Hz 640 x 400 70Hz 640 x 480 50 60 67 72 75 85Hz 720 x 400 70Hz 800 x 600 56 60 72 75 85Hz 832 x 624 75Hz 1024 x 768 60Hz 1024 x 768 70 72 75 8...

Page 33: ...check whether the firmware version is the latest If not please do the following procedures to upgrade it to the latest version 2 1 Equipment Needed VG712s b Monitor Fixture for Firmware Upgrade Power...

Page 34: ...ug Power Adapter to Fixture 2 2 4 Connect Power Cord to VG712 Monitor 2 2 5 Connect PC to the additional monitor PC VGA Cable P N 42 59901 003 Fixture Printer Port Power Adapter for Fixture P N 47 582...

Page 35: ...2 2 6 Install GProbe Program by selecting and clicking Gprobe icon Press Yes or Next buttons until the installation is complete 32 ViewSonic Corporation Confidential Do Not Copy VG712s b...

Page 36: ...33 ViewSonic Corporation Confidential Do Not Copy VG712s b...

Page 37: ...34 ViewSonic Corporation Confidential Do Not Copy VG712s b...

Page 38: ...35 ViewSonic Corporation Confidential Do Not Copy VG712s b...

Page 39: ...ion Controls Step 2 Save these three files bdisp txt p204_205 bin and 712AV_V2_65 bin in a hard disk better in a root directory e g C or D Step 3 Open bdisp txt file Key in the path where you save the...

Page 40: ...Step 4 Execute Gprobe program Step 5 Click Connection Setup icon Select Protocol DDC 2Bi3 Port LPT1 0x378 Speed 70000 37 ViewSonic Corporation Confidential Do Not Copy VG712s b...

Page 41: ...fter Gprobe and then press Enter If the test result shows passed it means the connection is well If not failed it means the connection has problems Then you need to check the setup procedure or reboot...

Page 42: ...Step 7 Key in batch C VG712 bdisp txt after Gprobe and then press Enter key to begin programming Step 8 The successful picture is as follows 39 ViewSonic Corporation Confidential Do Not Copy VG712s b...

Page 43: ...cord of VG712s b and then enter Burn In Mode Refer to Chapter III 3 Hot Keys for Function Controls Check if the version of BIOS is correct Step 10 At last do All Mode Reset 40 ViewSonic Corporation Co...

Page 44: ...xecute the command at or after line11 in the bdisp txt batch file please copy the error line of the bdisp txt batch file to Gprobe in the Gprobe program and then press Enter For example there is Error...

Page 45: ...t passed Test passed Erasing FLASH Done Writing FLASH Writing FLASH FAILED Error executing batch file at line 16 Execution time 9 61s GProbe Line 16 Line 16 42 ViewSonic Corporation Confidential Do No...

Page 46: ...k You then have to replace the main board 3 DDC Key In Procedure Note 1 Every time after replacing the main board you have to do the DDC key in 2 If you find the DDC does not conform to the monitor yo...

Page 47: ...al monitor for checking the program execution PC V3 Fixture VGA Cable P N 42 59901 003 RS 232 Cable P N 42 55907 001 Power Adapter for Fixture P N 47 57702 001 DVI DVI Cable P N 42 56108 012 Barcode R...

Page 48: ...VI Cable 3 2 3 Connect P1 of Fixture with COM1 of PC by RS 232 Cable 3 2 4 Plug Power Adapter to Fixture JP1 3 2 5 Connect Power Cord to VG712s b Monitor 3 2 6 Connect PC to the additional monitor JP1...

Page 49: ...3 3 DDC Key In Procedure Step 1 Select and execute DDC Key In program Step 2 Select W w writing mode 46 ViewSonic Corporation Confidential Do Not Copy VG712s b...

Page 50: ...and then press Enter key Notice The English of the serial number should be capital letters Step 4 The successful picture is as follows The checksum values will appear after DDC is upgraded successful...

Page 51: ...ial number will show on the screen Step 6 Checking Method Execute the DDC Key In program and select R r Reading mode in Step 2 Use the barcode reader to scan the barcode of the monitor or manually key...

Page 52: ...nt repairing and professional problems 1 Equipment Needed VG712s b Monitor Philips Screw Driver 101 and 107 Electronic Hex Nut M5 mm PC Personal Computer with SXGA resolution and sound card Pattern Ge...

Page 53: ...2 1 A Power Circuit Troubleshooting 2 2 B Performance Troubleshooting 50 ViewSonic Corporation Confidential Do Not Copy VG712s b...

Page 54: ...51 ViewSonic Corporation Confidential Do Not Copy VG712s b...

Page 55: ...is action if Ghost image disappears go to Yes else go to No 2 Check the compatibility on the computer If it is compatibility problem feedback the information to ViewSonic else go to No 2 3 C Control F...

Page 56: ...73GT W6 H6 5 L30 M MS 0808 8950 41 61603 001 1 35 FILAMENT TAPE 3M NO 8915 25mm 55M M MS 0808 8797 51 00014 002 TAPE FOR WIRE 0 0032 36 LCD PROTECT FILM 355 290 0 1t mm MYLAR VG700 VG750 M MS 0808 895...

Page 57: ...VE CS VS06 140 21 0 3t M MS 0808 8947 35 62703 001 COMESTIC STRIP ADHESIVE 1 33 ViewSonic AL LOGO E015 016 1 ViewSonic M MS 0808 8948 35 62704 001 1 34 EMI Tape 80773 20 40mm M MS 0808 8882 41 55601 0...

Page 58: ...002 VESA RUBBER PAD D7 0 H4 5 VG710b 4 29 M MS 0808 9644 52 62702 001 RUBBER SPACER 20 10 5 5mm 4 30 M MS 0808 9646 52 62703 002 RUBBER 30 15 4 BLACK VG710 1 31 M MS 0808 7882 52 62707 001 SPONGE 8 0...

Page 59: ...05mA C1 C20 2 77 N A 02 22447 101 CAP CC 22pF 5 50V NPO 0603 YCTC TEAM C192 C59 C60 C61 C75 C76 6 78 N A 02 33575 101 CAP CC 330pF 8P4C 20 25V 1206 INPAQ CP13 CP14 2 79 N A 02 50347 101 CAP CC 5pF 5 5...

Page 60: ...0b FRONT ARM 1 129 M MS 0808 8956 51 62708 002 REAR ARM ABS HB VS08 VG710b REAR ARM 1 130 M MS 0808 9645 52 62703 001 RUBBER FOOT 35 10 1 2t VG710 RUBBER FOOT 5 131 M MS 0808 8960 61 62703 001 BASE PL...

Page 61: ...G712 2 28 M MS 0808 8972 52 62701 001 VESA RUBBER PAD D7 0 H4 5 VG710s 4 29 M MS 0808 9644 52 62702 001 RUBBER SPACER 20 10 5 5mm 4 30 M MS 0808 9646 52 62703 002 RUBBER 30 15 4 BLACK VG710 1 31 M MS...

Page 62: ...C1 54 C155 C156 C157 C158 C1 59 C16 C161 C162 C169 C17 1 C172 C175 C176 C18 C180 C181 C182 C183 C184 C2 C2 02 C203 C21 C23 C24 C26 C28 C3 C33 C35 C37 C39 C4 0 C48 C49 C57 C63 C64 C65 C66 C67 C68 C69 C...

Page 63: ...123 M SCW 0824 0651 85 1F123 060 SCREW PAN MECH W SF M3 6 Ni 19 124 M SCW 0824 6753 85 4A323 040 SCREW FLATE MECH M3 4 BLACK 2 125 M SCW 0824 6756 85 TA123 080 SCREW CAP TAP M3 8 Ni 4 126 M SCW 0824...

Page 64: ...8 Exploded Diagram And Spare Parts List 61 ViewSonic Corporation Confidential Do Not Copy VG712s b...

Page 65: ...LATE MECH M3 4 BLACK 2 23 M SCW 0824 0651 85 1F123 060 SCREW PAN MECH W SF M3 6 Ni 3 24 M MS 0808 8949 41 58301 001 EMI TAPE 80773 25 75mm 1 25 M BK 0805 0023 61 00042 001 LOCK BRKT CAP SECC 0 8t 1 26...

Page 66: ...701 001 VESA RUBBER PAD D7 0 H4 5 VG710s 4 28 M MS 0808 8970 51 62707 001 FRONT ARM ABS HB VS06 VG710s 1 29 M MS 0808 8961 61 62704 001 HINGE SPCC Zn 2 0t VG710s 1 30 M MS 0808 8971 51 62708 001 REAR...

Page 67: ...1 ADAPTER IN100 240V 12V 3 33A LSE 1 5 M MS 0808 9642 51 62710 001 PE BAG LDPE 450 700 0 07t W HOLE VG710 1 6 E 00000214 DC 62701 013 D C VG712b AUO TWO TONE TCO99 1 7 M LB 0830 0733 35 62701 005 LABE...

Page 68: ...sday July 10 2003 E Title Size Document Number Rev Date Sheet of SCL R G B SDA DDC_IIC AC 110 240V 12V HS VS DDC_IIC VL VH BLON VOLU ME 12V 12VI N 5V 3 3VD 3 3VA 2 5V DVS DHS DEN DCLK MUT E INVERTER R...

Page 69: ...0 1uF R8 330 1 L4 150uH C27 1000uF 10V C26 0 1uF C155 0 1uF C11 0 1uF C178 NC 100pF C9 100uF 16V R7 200 1 C10 0 1uF R4 330 1 L9 22uH L6 22uH D1 IN5822 C149 0 1uF R3 330 1 R6 0 C39 0 1uF C12 100uF 16V...

Page 70: ...19 20 21 22 23 24 25 26 27 28 29 RX2 RX2 GND RX4 RX4 SCL SDA VS RX1 RX1 GND RX3 RX3 5V GND HP RX0 RX0 GND RX5 RX5 GND RXC RXC RIN GIN BIN HS GND D_SUB JP6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 RIN GIN...

Page 71: ...gm5120 PQFP208 171 170 167 166 163 162 179 180 185 186 191 192 151 152 40 41 42 43 44 45 50 51 52 118 115 117 116 195 194 174 205 204 5 4 6 7 39 201 25 24 23 22 19 18 17 16 15 8 35 34 33 32 31 30 29 2...

Page 72: ...01uF C163 0 01uF R96 0 R97 0 C123 1000uF 16V C115 1uF R7 9 7 87K 1 L21 BEAD 600 L20 BEAD 600 R77 1K C118 100uF 16V L16 22uH JP10 4 HE ADER 1 2 3 4 L15 BEAD U12 AN7522 1 2 3 4 5 6 7 8 9 10 11 12 L18 BE...

Page 73: ...E1 DBE4 DBE2 DBE5 DBE6 DBE7 DBE0 DBE7 DBE3 DBE4 DBE2 DBE1 DBE3 DBE0 DGO1 DGO2 DGO3 DGO0 DGO6 DGO7 DGO4 DGO5 DBO7 DBO4 DBO6 DBO5 DBO2 DBO1 DBO3 DBO0 DRO 0 7 6 DGO 0 7 6 DBO 0 7 6 DRE 0 7 6 DGE 0 7 6 DB...

Page 74: ...16 18 19 20 22 23 24 25 27 28 30 26 51 52 54 55 56 53 29 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 VCC TxIN5 TxIN6 TxIN7 TxIN8 GND GND GND TxIN9 TxIN10 VCC VCC TxIN11 TxIN12 TxIN13...

Page 75: ...11 PCB Layout Diagrams 72 ViewSonic Corporation Confidential Do Not Copy VG712s b...

Page 76: ...VG712s b Service Manual m e t I t n e l l e c x E d o o G r i a F d a B 1 2 3 t i n U r i a F d a B in the USA at facsimile 1 909 839 7943 You may also e mail any suggestions to the Director Quality...

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