ViewSonic Vx2255wmb-2 Service Manual
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4.7.5CN103 (D-SUB Connector) Symbol Pin Symbol Pin Symbol 1 Red video input 6 Red GND 11 GND 2 Green video input 7 Green GND 12 Serial data (SDA) 3 Blue video input 8 Blue GND 13 H / H+V SYNC 4 GND 9 +5V(from PC) 14 VSYNC 5 Cable Detect 10 GND 15 Data clock line (SCL) 4.8 Key Parts Pin Assignment 4.8.1 IC802 (TOP245Y or TO P246Y, Power Control IC) Pin Symbol I/O Description 1 C I Control 2 L I Line Sense 3 X I External Current Limit 4 S O Source of MOSFET(GND) 5 F I Frequency 6 D I Drain of MOSFET 28 ViewSonic Corporation Confidential - Do Not Copy VX2255wmb-2 VX2255wmh-2
4.8.2 IC501 (OZ9938GN, CCFL inverter controller IC) Pin No. Symbol I/O Description 1 DRV1 O Drive output 2 VDDA I Supply voltage input 3 TIMER I Timing capacitor to set striking time and shut down delay time 4 DIM I Analog dimming or Internal LPWM dimming or external PWM pulse input for dimming function 5 ISEN I Current sense feedback 6 VSEN I Voltage sense feedback 7 OVPT I Over-voltage/over-current protection threshold setting pin 8 NC 9 NC 10 ENC I ON/OFF control of IC 11 L C T I Timing capacitor to set internal PWM dimming frequency and also a pin for analog dimming selection 12 SSTCMP I Capacitor for soft start time and loop compensation 13 CT I Timing resistor and capacitor for operation and striking frequency 14 GNDA Ground for analog signals 15 DRV2 O Drive output 16 PGND Ground for power paths 29 ViewSonic Corporation Confidential - Do Not Copy VX2255wmb-2 VX2255wmh-2
4.8.3 U105(TSUM58WHJ ) Pin Symbol I/O Description 1 NC Not connected 2 GND Ground 3 NC Not connected 4 NC Not connected 5 GND Ground 6 NC Not connected 7 NC Not connected 8 AVDD_DC I ADC Power 9 NC Not connected 10 NC Not connected 11 GND Ground 12 NC Not connected 13 NC Not connected 14 AVDD_DC I ADC Power 15 REXT External resistor 390 ohm to AVDD_ADC 16 AVDD_PLL I PLL Power 17 BIN0M I Reference ground for analog blue input 18 BIN0P I Analog blue input 19 GIN0M I Reference ground for analog green input 20 GIN0P I Analog green input 21 SOGIN0 I Sync-on-green input 22 RIN0M I Reference ground for analog red input 23 RIN0P I Analog red input 24 AVDD_ADC I ADC Power 25 REFM Internal ADC bottom de-coupling pin 26 REFP Internal ADC top de-coupling pin 27 HSYNC0 I Analog HSYNC input 28 VSYNC0 I Analog VSYNC input 29 GND Ground 30 DDCA_SDA/RS232_TX I/O DDC Data for Analog Interface; 4mA driving strength/UART Transmitter/GPIO 31 DDCA_SCL/RS232_RX I/O DDC Clock for Analog Interface/UART Receiver/GPIO 32 VDDP I Digital Output Power 33 GND Ground 34 VDDC I Digital Core Power 35 GPIO_P15/PWM0 I/O General Purpose Input/Output; 4mA driving strength/Pulse Width Modulation Output; 4mA driving 36 NC Not Connected 37 SDO I SPI Flash Serial Data Output 38 SCZ O SPI Flash Chip Select 30 ViewSonic Corporation Confidential - Do Not Copy VX2255wmb-2 VX2255wmh-2
39 SCK O SPI Flash Serial Clock 40 SDI O SPI Flash Serial Data Input 41 NC Not Connected 42 NC Not Connected 43 GPIO_P11/I2C_MDA I/O General Purpose Input/Output; 4mA driving strength/I2C Master Data 44 GPIO_P10/I2C_MCL I/O General Purpose Input/Output; 4mA driving strength/I2C Master Clock 45 NC Not Connected 46 NC Not connected 47 NC Not connected 48 GPIO_P27/PWM1 I/O General Purpose Input/Output; 4mA driving strength/Pulse Width Modulation Output; 4mA driving strength 49 VDDP I Digital Output Power 50 GND Ground 51 VDDC I Digital Core Power 52 MODE[0] I Chip Configuration Input 53 MODE[1] I Chip Configuration Input 54 LVA3P O A-Link Positive LVDS Differential Data Output 55 LVA3M O A-Link Negative LVDS Differential Data Output 56 VDDP I Digital Output Power 57 GND Ground 58 LVACKP O A-Link Positive LVDS Differential Clock Output 59 LVACKM O A-Link Negative LVDS Differential Clock Output 60 LVA2P O A-Link Positive LVDS Differential Data Output 61 LVA2M O A-Link Negative LVDS Differential Data Output 62 LVA1P O A-Link Positive LVDS Differential Data Output 63 LVA1M O A-Link Negative LVDS Differential Data Output 64 LVA0P O A-Link Positive LVDS Differential Data Output 65 LVA0M O A-Link Negative LVDS Differential Data Output 66 VDDC I Digital Core Power 67 LVB3P O B-Link Positive LVDS Differential Data Output 68 LVB3M O B-Link Negative LVDS Differential Data Output 69 LVBCKP O B-Link Positive LVDS Differential Clock Output 70 LVBCKM O B-Link Negative LVDS Differential Clock Output 71 LVB2P O B-Link Positive LVDS Differential Data Output 72 LVB2M O B-Link Negative LVDS Differential Data Output 73 LVB1P O B-Link Positive LVDS Differential Data Output 74 LVB1M O B-Link Negative LVDS Differential Data Output 31 ViewSonic Corporation Confidential - Do Not Copy VX2255wmb-2 VX2255wmh-2
75 VDDP I Digital Output Power 76 GND Ground 77 LVB0P O B-Link Positive LVDS Differential Data Output 78 LVB0M O B-Link Negative LVDS Differential Data Output 79 GND Ground 80 BYPASS For External Bypass Capacitor 81 NC Not connected 82 VDDC I Digital Core Power 83 GND Ground 84 RST I Chip Reset; High Reset 85 GPIO_P12 I/O General Purpose Input/Output; 4mA driving strength 86 PWM1/GPIO_P25 I/O Pulse Width Modulation Output; 4mA driving strength/General Purpose Input/Output; 4mA driving 87 RSTN I Chip Reset; Low Reset 88 GPIO_P00/SAR1 I/O General Purpose Input/Output; 4mA driving strength/SAR ADC Input 89 GPIO_P01/SAR2 I/O General Purpose Input/Output; 4mA driving strength/SAR ADC Input 90 GPIO_P02/SAR3 I/O General Purpose Input/Output; 4mA driving strength/SAR ADC Input 91 GPIO_P06 I/O General Purpose Input/Output; 6/12mA programmable driving strength 92 GPIO_P07 I/O General Purpose Input/Output; 6/12mA programmable driving strength 93 PWM0/GPIO_P26 I/O Pulse Width Modulation Output; 4mA driving strength/General Purpose Input/Output; 4mA driving strength 94 GPIO_P13 I/O General Purpose Input/Output; 4mA driving strength 95 GPIO_P14 I/O General Purpose Input/Output; 4mA driving strength 96 XIN I Crystal Oscillator Input 97 XOUT O Crystal Oscillator Output 98 AVDD_MPLL I MPLL Power 99 GPIO_P16/PWM2 I/O General Purpose Input/Output; 4mA driving strength/ Pulse Width Modulation Output; 4mA driving strength 100 NC Not connected 32 ViewSonic Corporation Confidential - Do Not Copy VX2255wmb-2 VX2255wmh-2
VX2255wmb-2_A
Time: 05:43:23
Date: Tue Jan 16, 2007
______________________________________________________________________
VIEWSONIC CORPORATION
EDID Version # 1, Revision # 3
DDCTest For: ViewSonic VX2255wm-2
______________________________________________________________________
EDID Block 0, Bytes 0-127
128 BYTES OF EDID CODE:
0 1 2 3 4 5 6 7 8 9
________________________________________
0 | 00 FF FF FF FF FF FF 00 5A 63
10 | 1F 9B 01 01 01 01 01 11 01 03
20 | 0E 2F 1E 78 2E DC 55 A3 59 48
30 | 9E 24 11 50 54 BF EF 80 A9 40
40 | 90 40 95 00 81 40 81 80 71 4F
50 | 01 01 01 01 21 39 90 30 62 1A
60 | 27 40 68 B0 36 00 DA 28 11 00
70 | 00 1C 00 00 00 FF 00 51 4B 39
80 | 30 37 30 31 30 30 30 30 31 0A
90 | 00 00 00 FD 00 32 4B 18 52 11
100 | 00 0A 20 20 20 20 20 20 00 00
110 | 00 FC 00 56 58 32 32 35 35 77
120 | 6D 2D 32 0A 20 20 00 B1
______________________________________________________________________
(08-09) ID Manufacturer Name ________________ = VSC
(11-10) Product ID Code _____________________ = 9B1F
(12-15) Last 5 Digits of Serial Number ______ = Not Used
(16) Week of Manufacture _________________ = 01
(17) Year of Manufacture _________________ = 2007
(10-17) Complete Serial Number ______________ = See Descriptor Block
(18) EDID Version Number _________________ = 1
(19) EDID Revision Number ________________ = 3
(20) VIDEO INPUT DEFINITION:
Analog Signal
0.700, 0.300 (1.000 Vp-p)
Separate Syncs, Composite Sync, Sync on Green
(21) Maximum Horizontal Image Size ________________ = 470 mm
(22) Maximum Vertical Image Size __________________ = 300 mm
(23) Display Gamma ________________________________ = 2.20
(24) Power Management and Supported Feature(s):
Active Off/Very Low Power, Standard Default Color Space,
Preferred Timing Mode
Display Type = R/G/B Color
(25-34) CHROMA INFO:
Red X- 0.640 Green X- 0.284 Blue X- 0.142 White X- 0.313
Red Y- 0.349 Green Y- 0.617 Blue Y- 0.067 White Y- 0.329
(35) ESTABLISHED TIMING 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)
33
ViewSonic Corporation
Confidential - Do Not Copy VX2255wmb-2
VX2255wmh-2
(36) ESTABLISHED TIMING II:
800 X 600 @ 72Hz (VESA)
800 X 600 @ 75Hz (VESA)
832 X 624 @ 75Hz (Apple,Mac II)
1024 X 768 @ 60Hz (VESA)
1024 X 768 @ 70Hz (VESA)
1024 X 768 @ 75Hz (VESA)
1280 X 1024 @ 75Hz (VESA)
(37) Manufacturer's Reserved Timing:
1152 X870 @ 75Hz (Apple,Mac II)
(38-53) Standard Timing Identification:
1600 X 1200 @60Hz
1400 X 1050 @60Hz
1440 X 900 @60Hz
1280 X 960 @60Hz
1280 X 1024 @60Hz
1152 X 864 @75Hz
Not Used
Not Used
______________________________________________________________________
(54-71) Detailed Timing / Descriptor Block 1:
1680x1050 Pixel Clock: 146.25 MHz
______________________________________________________________________
Horizontal Image Size: 474 mm Vertical Image Size: 296 mm
Refreshed Mode: Non-Interlaced Normal Display- No Stereo
Horizontal:
Active Time: 1680 pixels Blanking Time: 560 pixels
Sync Offset: 104 pixels Sync Pulse Width: 176 pixels
Border: 0 pixels Frequency: 65.29 KHz
Vertical:
Active Time: 1050 lines Blanking Time: 39 lines
Sync Offset: 3 lines Sync Pulse Width: 6 lines
Border: 0 lines Frequency: 59.95 Hz
Digital Separate, Horizontal Polarity (-) Vertical Polarity (+)
______________________________________________________________________
(72-89) Detailed Timing / Descriptor Block 2:
Monitor Serial Number:
QK9070100001
______________________________________________________________________
(90-107) Detailed Timing / Descriptor Block 3:
Monitor Range Limits:
Min Vertical Freq- 50 Hz
Max Vertical Freq- 75 Hz
Min Horiz. Freq- 24 KHz
Max Horiz. Freq- 82 KHz
Pixel Clock- 170 MHz
Secondary GTF- Not Supported
______________________________________________________________________
(108-125) Detailed Timing / Descriptor Block 4:
Monitor Name:
VX2255wm-2
(126) No Extension EDID Block(s)
(127) CheckSum OK
34
ViewSonic Corporation
Confidential - Do Not Copy VX2255wmb-2
VX2255wmh-2
VX2255wmb-2_D
Time: 05:44:24
Date: Tue Jan 16, 2007
______________________________________________________________________
VIEWSONIC CORPORATION
EDID Version # 1, Revision # 3
DDCTest For: ViewSonic VX2255wm-2
______________________________________________________________________
EDID Block 0, Bytes 0-127
128 BYTES OF EDID CODE:
0 1 2 3 4 5 6 7 8 9
________________________________________
0 | 00 FF FF FF FF FF FF 00 5A 63
10 | 1F 9B 01 01 01 01 01 11 01 03
20 | 80 2F 1E 78 2E DC 55 A3 59 48
30 | 9E 24 11 50 54 BF EF 80 A9 40
40 | 90 40 95 00 81 40 81 80 71 4F
50 | 01 01 01 01 21 39 90 30 62 1A
60 | 27 40 68 B0 36 00 DA 28 11 00
70 | 00 1C 00 00 00 FF 00 51 4B 39
80 | 30 37 30 31 30 30 30 30 31 0A
90 | 00 00 00 FD 00 32 4B 18 52 11
100 | 00 0A 20 20 20 20 20 20 00 00
110 | 00 FC 00 56 58 32 32 35 35 77
120 | 6D 2D 32 0A 20 20 00 3F
______________________________________________________________________
(08-09) ID Manufacturer Name ________________ = VSC
(11-10) Product ID Code _____________________ = 9B1F
(12-15) Last 5 Digits of Serial Number ______ = Not Used
(16) Week of Manufacture _________________ = 01
(17) Year of Manufacture _________________ = 2007
(10-17) Complete Serial Number ______________ = See Descriptor Block
(18) EDID Version Number _________________ = 1
(19) EDID Revision Number ________________ = 3
(20) VIDEO INPUT DEFINITION:
Digital Signal
Non- VESA DFP 1.x Compatible
(21) Maximum Horizontal Image Size ________________ = 470 mm
(22) Maximum Vertical Image Size __________________ = 300 mm
(23) Display Gamma ________________________________ = 2.20
(24) Power Management and Supported Feature(s):
Active Off/Very Low Power, Standard Default Color Space,
Preferred Timing Mode
Display Type = R/G/B Color
(25-34) CHROMA INFO:
Red X- 0.640 Green X- 0.284 Blue X- 0.142 White X- 0.313
Red Y- 0.349 Green Y- 0.617 Blue Y- 0.067 White Y- 0.329
(35) ESTABLISHED TIMING 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 (VESA)
35
ViewSonic Corporation
Confidential - Do Not Copy VX2255wmb-2
VX2255wmh-2
800 X 600 @ 75Hz (VESA)
832 X 624 @ 75Hz (Apple,Mac II)
1024 X 768 @ 60Hz (VESA)
1024 X 768 @ 70Hz (VESA)
1024 X 768 @ 75Hz (VESA)
1280 X 1024 @ 75Hz (VESA)
(37) Manufacturer's Reserved Timing:
1152 X 870 @ 75Hz (Apple,Mac II)
(38-53) Standard Timing Identification:
1600 X 1200 @60Hz
1400 X 1050 @60Hz
1440 X 900 @60Hz
1280 X 960 @60Hz
1280 X 1024 @60Hz
1152 X 864 @75Hz
Not Used
Not Used
______________________________________________________________________
(54-71) Detailed Timing / Descriptor Block 1:
1680x1050 Pixel Clock: 146.25 MHz
______________________________________________________________________
Horizontal Image Size: 474 mm Vertical Image Size: 296 mm
Refreshed Mode: Non-Interlaced Normal Display- No Stereo
Horizontal:
Active Time: 1680 pixels Blanking Time: 560 pixels
Sync Offset: 104 pixels Sync Pulse Width: 176 pixels
Border: 0 pixels Frequency: 65.29 KHz
Vertical:
Active Time: 1050 lines Blanking Time: 39 lines
Sync Offset: 3 lines Sync Pulse Width: 6 lines
Border: 0 lines Frequency: 59.95 Hz
Digital Separate, Horizontal Polarity (-) Vertical Polarity (+)
______________________________________________________________________
(72-89) Detailed Timing / Descriptor Block 2:
Monitor Serial Number:
QK9070100001
______________________________________________________________________
(90-107) Detailed Timing / Descriptor Block 3:
Monitor Range Limits:
Min Vertical Freq- 50 Hz
Max Vertical Freq- 75 Hz
Min Horiz. Freq- 24 KHz
Max Horiz. Freq- 82 KHz
Pixel Clock- 170 MHz
Secondary GTF- Not Supported
______________________________________________________________________
(108-125) Detailed Timing / Descriptor Block 4:
Monitor Name:
VX2255wm-2
(126) No Extension EDID Block(s)
(127) CheckSum OK
36
ViewSonic Corporation
Confidential - Do Not Copy VX2255wmb-2
VX2255wmh-2
VX2255wmh-2_A
Time: 08:18:21
Date: Tue Jan 16, 2007
______________________________________________________________________
VIEWSONIC CORPORATION
EDID Version # 1, Revision # 3
DDCTest For: ViewSonic VX2255wm-2
______________________________________________________________________
EDID Block 0, Bytes 0-127
128 BYTES OF EDID CODE:
0 1 2 3 4 5 6 7 8 9
________________________________________
0 | 00 FF FF FF FF FF FF 00 5A63
10 | 1F 9B 01 01 01 01 01 11 01 03
20 | 0E 2F 1E 78 2E DC 55 A3 59 48
30 | 9E 24 11 50 54 BF EF 80 A9 40
40 | 90 40 95 00 81 40 81 80 71 4F
50 | 01 01 01 01 21 39 90 30 62 1A
60 | 27 40 68 B0 36 00 DA 28 11 00
70 | 00 1C 00 00 00 FF 00 51 4B 41
80 | 30 37 30 31 30 30 30 30 31 0A
90 | 00 00 00 FD 00 32 4B 18 52 11
100 | 00 0A 20 20 20 20 20 20 00 00
110 | 00 FC 00 56 58 32 32 35 35 77
120 | 6D 2D 32 0A 20 20 00 A9
______________________________________________________________________
(08-09) ID Manufacturer Name ________________ = VSC
(11-10) Product ID Code _____________________ = 9B1F
(12-15) Last 5 Digits of Serial Number ______ = Not Used
(16) Week of Manufacture _________________ = 01
(17) Year of Manufacture _________________ = 2007
(10-17) Complete Serial Number ______________ = See Descriptor Block
(18) EDID Version Number _________________ = 1
(19) EDID Revision Number ________________ = 3
(20) VIDEO INPUT DEFINITION:
Analog Signal
0.700, 0.300 (1.000 Vp-p)
Separate Syncs, Composite Sync, Sync on Green
(21) Maximum Horizontal Image Size ________________ = 470 mm
(22) Maximum Vertical Image Size __________________ = 300 mm
(23) Display Gamma ________________________________ = 2.20
(24) Power Management and Supported Feature(s):
Active Off/Very Low Power, Standard Default Color Space,
Preferred Timing Mode
Display Type = R/G/B Color
(25-34) CHROMA INFO:
Red X- 0.640 Green X- 0.284 Blue X- 0.142 White X- 0.313
Red Y- 0.349 Green Y- 0.617 Blue Y- 0.067 White Y- 0.329
(35) ESTABLISHED TIMING 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 (VESA)
800 X 600 @ 75Hz (VESA)
37
ViewSonic Corporation
Confidential - Do Not Copy VX2255wmb-2
VX2255wmh-2