ViewSonic Vx2255wmb-2 Service Manual
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Page 31
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...
Page 32
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...
Page 33
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...
Page 34
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...
Page 35
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...
Page 36
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...
Page 37
(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...
Page 38
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...
Page 39
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...
Page 40
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...