ViewSonic VG500b-1 Service Manual Download

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ViewSonic Corporation

VG500b-1

Confidential

– Do Not Copy

VDDD=3.3V
VCOM=3.45V
VDDG=18V
VDDA=9.2V
VEEG= -6V

E91001

5.0 Panel Interface

Wednesday, October 02, 2002

Title

Size

Document Number

Rev

Date:

Sheet

OR2
OR1
OR0

OR4

OR6
OR5

OR7

OR3

CLKH-
HMS1_O
HMS2_E
DHS_LP
EPOL

CLKV
STV1

OG5

OG0

EG1

EB0

EG6

ER6

OG4

ER5

OB6

EG7

OB1

OB3

OG6

OG1

EB2

ER7

EG2

ER4

OB2

OG7

EB1

EB3

OB5
OB4

OG2

ER0

EG0

EG5

ER2

EG3

EB6

OB7

OB0

ER3

OG3

EB4

EG4

EB5

EB7

ER1

GND
GND
CLKH-
GND
GND
OB7
OB6
OB5
OB4
OB3
OB2
OB1
OB0
GND
OG7

OG2

OG3

OG4

OG5

OG6

OG1
OG0
GND
OR7
OR6

OR1

OR2

OR3

OR4

OR5

OR0
GND
GND
VDDA
VDDA

GND

VDDA

GND
GND
GND
EPOL
HMS2_E

GND

STH1

DHS_LP

HMS1_O

VDDA

GND
GND

VDDG
VDDG
CLKV
STV1
VDDD

VDDD
VDDD

VCOM
VCOM
VCOM
VCOM
VCOM

GND
GND
EB7
EB6
EB5
EB4
EB3
EB2
EB1
EB0
GND
EG7
EG6
EG5
EG4
EG3
EG2
EG1
EG0
GND
ER7
ER6
ER5
ER4
ER3
ER2
ER1
ER0
GND
GND

VEEG
VEEG

VDDD

VCOM

STH1

VDDD

VCOM

VDDA

VDDG

VEEG

GND

CN501

IL-FHR-50S-HF

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
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

CN502

IL-FHR-50S-HF

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
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

OR[0..7]

EG[0..7]

ER[0..7]

OG[0..7]

EB[0..7]

OB[0..7]

CLKH-

HMS1_O

HMS2_E

DHS_LP

EPOL

CLKV

STV1

STH1

Summary of Contents for VG500b-1

Page 1: ...Service Manual ViewSonic VG500b 1 Model No VLCDS24349 1 15 Digital Controlled Color Monitor VG500b 1_SM_574 Rev 1 0 October 2002 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583...

Page 2: ...he contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular purpose Further ViewSonic reserves the right to revise this publication and to make changes...

Page 3: ...ernal Connector Pin Assignment 6 5 Troubleshooting Flow Chart 10 6 Adjustment 14 7 Theory of Operation 15 8 Electrical Parts List 16 10 Block Diagram 21 11 Schematic Diagrams 22 12 PCB Layout DiagramS...

Page 4: ...power cable immediately and consult your local dealer z Always unplug the monitor before cleaning it Clean the cabinet with a clean dry cloth Apply non ammonia based cleaner onto the cloth not directl...

Page 5: ...hroma 2237 or equivalent 2 MULTIMETER Fluke 45 or equivalent 3 SCREW DRIVER 4 OSCILLOSCOPE Tektronik TDS3054 digital oscilloscope or equivalent 5 SOLDER IRON 2 SERVICE TOOL AND EQUIPMENT REQUIRED View...

Page 6: ...tical 55 45 Tilt 5 20 Contrast Ratio Brightness 400 1 typical 250 1 minimum 200cd m min 250cd m typ Response Time Tr 7ms Tf 23ms Active Display Area 304 1mm H x 228 1mm V Temperature Operating 0 C 40...

Page 7: ...11 MAC 832x624 75Hz 57 272MHz 12 VESA 1024x768 60Hz 65MHz 13 VESA 1024x768 70Hz 75 000MHz 14 VESA 1024x768 72Hz 78 000MHz 15 MAC 1024x768 75Hz 80 000MHz 16 VESA 1024x768 75Hz 78 750MHz 3 3 D SUB CONNE...

Page 8: ...Pin No Symbol Function 1 GND Ground 2 DC 12V Main DC 12V Input 3 GND Ground 3 5 Audio Input Jack J701 on I F Board Pin No Symbol Function 1 Ground 2 L_CH_Audio Input 3 R_CH_Audio Input 4 L_CH_Audio R...

Page 9: ...CCFL_EN Backlight lamps ON high Off Low control 6 GPIO2 PWM2 Brightness adjustments Low Max Hi Min 7 MUTE Audio Must control High means SPK off Low means On 8 GND Ground 9 5V DC 5V 10 5V DC 5V 11 STD...

Page 10: ...9V for panel D A reference voltage to make gray scale smooth 37 VDDA DC 9V for panel D A reference voltage to make gray scale smooth 38 VDDA DC 9V for panel D A reference voltage to make gray scale sm...

Page 11: ...d 32 EG7 Green data signal of even pixel 33 EG6 Green data signal of even pixel 34 EG5 Green data signal of even pixel 35 EG4 Green data signal of even pixel 36 EG3 Green data signal of even pixel 37...

Page 12: ...D Ground 3 BRT Brightness adjustment Low is Max High is Min 4 DC 5V DC 5V 5 CCFL_EN Backlight lamps enable ON high OFF low CN701 S5BPH K Connect to control board control the audio Pin No Symbol Functi...

Page 13: ...401 End End The Voltage across C801 is 12V Replace F801 Check O P of U801 at pin7 pin10 Replace U801 The Voltage at L802 O P is 5V Replace U802 The Voltage across D802 is 5V Replace F802 Yes Yes Yes Y...

Page 14: ...ace U220 Yes No Next ReplaceD220 No The Voltage after D220 is 2 5V Yes Replace X400 C447 C448 No Replace U400 gm2115 End Check X400 crystal clock Yes Replace U401 Still No LED ViewSonic Corporation 11...

Page 15: ...laceU400 End Are two flex cables attached firmly at the LCD panel connectors Replace V901 LCD panel End Are two flex cables attached firmly at CN501 CN502 Are the input waveforms of gm2115 normal Tigh...

Page 16: ...connected to CN101 properly No Replace U701 U701 1 voltage is 10 5V Yes YES No sound Check if mute key is pressed Check U801 output 7 is normal U803 8 is 10 5V No Replace U801 Replace U803 YES No Chec...

Page 17: ...t access 2 Key 3 Brightness set at maximum 4 Switch pattern to full screen pixel on off pattern with R B color off and Green on Green color level set at level 255 5 Adjust VR601 until whole screen dis...

Page 18: ...lable row and column drivers All TCON signals OCLK ECK ORGB ERGB OSP ESP OPOL OINV EINV on pin 119 to pin 128 of U400 have programmable drive strengths and can be disabled to control Panel The flash m...

Page 19: ...5 5731433800 26 BACK COVER C BC 0302 0437 5733715700 27 CODEKEEPEER M MS 0808 8277 5731593000 28 NAME PLATE M MS 0808 8281 5733422800 29 F C2 5733715900 30 VGA CABLE A VC 0101 0272 5784011503 31 BUTTO...

Page 20: ...c Corporation 17 VG500b 1 Confidential Do Not Copy S 4 SCREW M3X6 7132160651 S 5 SCREW M3X8 7134161186 S 6 SCREW M4X8L 7004261116 S 7 SCREW M3X4 7131160252 S 8 SCREW M3X10 7132161456 S 9 SCREW M3X6 70...

Page 21: ...114TKA KSR1110 E Q 0402 1561 6621039854 22 F601 1206FA500mA32V E FS 0410 01045054405092 23 Q605 SI2301DS FDN360P E Q 0402 1563 6626007053 24 Q606 DTC114TKA E Q 0402 1561 6621039854 25 U604 RT9164CG E...

Page 22: ...51 52 53 9 EXPLODED DIAGRAM AND SPARE PARTS LIST ViewSonic Corporation 19 VG500b 1 Confidential Do Not Copy...

Page 23: ...MS 0808 8273 5731274500 2 32 Key Board 1 33 GASKET V3 5736214632 1 45X10X7 34 GASKET V1 5736214630 2 10X7X2 35 GASKET V4 5736214633 1 65X10X7 36 CU FOIL LABEL 5736214654 1 130X56X0 05 37 GASKET V2 573...

Page 24: ...S2_E CLKH STH1 EPOL HMS1_O 6 0 Panel Volt 6 0 Panel Volt PPWR0 PPWR1 gm5115 4 0 gm2115 RESET GREEN RED BLUE GPIO13_SCL VSYNC DHS_LP CCFL_EN HSYNC PPWR0 GPIO12_SDA ER 0 7 EB 0 7 EG 0 7 OR 0 7 OG 0 7 OB...

Page 25: ...C201 0 1uF U201 S524C80D41 1 2 3 4 5 6 7 8 A0 A1 A2 VSS SI SCK WP VCC R205 10K R220 510R F221 4A 125V C224 220uF 16V Q202 DTC114TKA KSR1110 U220 RC1117M 3 3 1 3 2 4 GND VIN VOUT TAB R203 330R CON220...

Page 26: ...00pF FL300 51R00P506 1 2 3 C305 0 1uF ZD303 MMSZ5232B R301 1K ZD304 MMSZ5232B FL302 51R00P506 1 2 3 R312 2 2K U300 S524C20D11 BR24C02F WE2 AT24C02 8 4 1 2 3 7 6 5 VCC GND A0 A1 A2 WP SCL SDA D306 SR24...

Page 27: ...D Int_Test U400 gm2115 TS PQFP208 171 170 167 166 163 162 179 180 185 186 191 192 151 152 40 41 42 43 44 45 46 47 49 50 51 52 118 115 117 116 195 194 174 120 121 122 123 124 125 126 127 128 206 207 20...

Page 28: ...ND VDDA VDDA GND VDDA VDDA VDDA GND GND GND EPOL HMS2_E GND GND STH1 DHS_LP HMS1_O VDDA GND GND VDDG VDDG CLKV STV1 VDDD VDDD VDDD VCOM VCOM VCOM VCOM VCOM GND GND EB7 EB6 EB5 EB4 EB3 EB2 EB1 EB0 GND...

Page 29: ...VDDD 5V VDDG GND GND GND 12V GND GND GND VDDA 3 3V GND R601 10K Q601 DTC114TKA KSR1110 C610 220uF 16V C612 330pF C606 10uF 16V C630 10uF 16V R612 2K L601 YC54 680K SR0604680KS R613 27K C635 0 1uF L60...

Page 30: ...OUT1 GND Vcc OUT2 DT2 FB2 INV2 NON2 SCP Vref C834 33uF 10V R812 16K R833 2 2K Q804 SST4403 R811 10K C804 0 1uF C830 0 1uF R810 100R 1W D802 ZENER 5 6V C811 100pF R824 6 8K R804 47K R803 47K C803 1uF...

Page 31: ...11 12 VCC CH1 O P GND CH1 O P STAND BY CH1 I P GND CH2 I P VOLUME CH2 O P GND CH2 O P CN701 S5BPH K 1 2 3 4 5 R703 4 7K R707 0R R702 270K C701 4 7uF C714 0 1uF L703 2CB160808A800 R713 0R R712 0R R715...

Page 32: ...up sp sp mute L_IN R_IN green amber GND GND GND GND GND CN101 T S5BPH K 1 2 3 4 5 S102 SKHHPL2420 TT 1 2 3 4 1 2 3 4 CN103 T S2B ZR 1 2 CN104 T B12B_ZR 1 2 3 4 5 6 7 8 9 10 11 12 S103 SKHHPL2420 TT 1...

Page 33: ...ViewSonic Corporation 30 VG500b 1 Confidential Do Not Copy TIV 092B Inverter PWB 0420 TP TP TP TP...

Page 34: ...12 PCB LAYOUT ViewSonic Corporation 31 VG500b 1 Confidential Do Not Copy...

Page 35: ...ViewSonic Corporation 32 VG500b 1 Confidential Do Not Copy...

Page 36: ...ViewSonic Corporation 33 VG500b 1 Confidential Do Not Copy...

Page 37: ...ViewSonic Corporation 34 VG500b 1 Confidential Do Not Copy...

Page 38: ...ViewSonic Corporation 35 VG500b 1 Confidential Do Not Copy...

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