ViewSonic N1900w-1E Service Manual page 23

19” lcd tv
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sets. The VCT 49xyI, VCT 48xyI family is based on
functional blocks contained and approved in existing
products like DRX 396xA, MSP 34x5G, VSP 94x7B,
DDP 3315C, and SDA 55xx.
Each member of the family contains the entire IF,
audio, video, display, and deflection processing for 4:3
and 16:9 50/60-Hz mono and stereo TV sets. The integrated
microcontroller is supported by a powerful OSD
generator with integrated Teletext & CC acquisition
including on-chip page memory.
Pin No. Pin Name Type Connection
PMQFP144 package
Pin 128 GND SUPPLY OBL Ground Platform
Pin 129 VSUP5.0BE SUPPLY OBL Supply Voltage Analog Video Back-end, 5.0 V
Pin 130 TEST /SUBW IN OUT GND Test Input, reserved for Test Subwoofer Output
Pin 131 VERT+ OUT GND Differential Vertical Sawtooth Output
Pin 132 VERT- OUT GND Differential Vertical Sawtooth Output
Pin 133 EW OUT GND Vertical Parabola Output
Pin 134 RSW2 OUT LV Range Switch 2 Output
Pin 135 RSW1 OUT LV Range Switch 1 Output
Pin 136 SENSE IN GND Sense ADC Input
Pin 137 GNDM IN GND Reference Ground for Sense ADC
Pin 138 FBIN IN GND Fast Blank Input, Back-end
Pin 139 RIN IN GND Analog Red Input, Back-end
Pin 140 GIN IN GND Analog Green Input, Back-end
Pin 141 BIN IN GND Analog Blue Input, Back-end
Pin 142 SVMOUT OUT VSUP5.0BE Scan Velocity Modulation Output
Pin 143 ROUT OUT VSUP5.0BE Analog Red Output
Pin 144 GOUT OUT VSUP5.0BE Analog Green Output
Pin 1 BOUT OUT VSUP5.0BE Analog Blue Output
Pin 2 VRD OBL Reference Voltage for RGB DACs
Pin 3 XREF OBL Reference Current for RGB DACs
Pin 4 VSUP3.3BE SUPPLY OBL Supply Voltage Analog Video Back-end, 3.3 V
Pin 5 GND SUPPLY OBL Ground Platform
Pin 6 GND SUPPLY OBL Ground Platform
Pin 7 VSUP3.3IO SUPPLY OBL Supply Voltage I/O Ports, 3.3 V
Pin 8 VSUP3.3DAC SUPPLY OBL Supply Voltage Video DACs, 3.3 V
Pin 9 GNDDAC SUPPLY OBL Ground Video DACs
Pin 10 SAFETY IN GND Safety Input
Pin 11 HFLB IN HOUT Horizontal Flyback Input
Pin 12 HOUT OUT LV Horizontal Drive Output
Pin 13 VPROT IN GND Vertical Protection Input
Pin 37 PWMV OUT LV PWM Vertical Output
Pin 38 DFVBL OUT LV Dynamic Focus Vertical Blanking Output
Pin 39 SDA IN/OUT OBL I2C Bus Data Input/Output
Pin 40 SCL IN/OUT OBL I2C Bus Clock Input/Output
Pin 41 P21 IN/OUT LV Port 2, Bit 1 Input/Output
Pin 42 P20 IN/OUT LV Port 2, Bit 0 Input/Output
Pin 43 P17 IN/OUT LV Port 1, Bit 7 Input/Output
Pin 44 P16 IN/OUT LV Port 1, Bit 6 Input/Output
Pin 45 P15 IN/OUT LV Port 1, Bit 5 Input/Output
Pin 47 P13 IN/OUT LV Port 1, Bit 3 Input/Output
Pin 48 P12 IN/OUT LV Port 1, Bit 2 Input/Output
Pin 49 P11 IN/OUT LV Port 1, Bit 1 Input/Output
Pin 50 P10 IN/OUT LV Port 1, Bit 0 Input/Output
Pin 53 VSUP3.3FE SUPPLY OBL Supply Voltage Analog Video Front-end, 3.3 V
Pin 54 GND SUPPLY OBL Ground Platform
Pin 55 GND SUPPLY OBL Ground Platform
Pin 56 VSUP1.8FE SUPPLY OBL Supply Voltage Analog Video Front-end, 1.8 V
Pin 57 VOUT3 OUT LV Analog Video 3 Output
20
ViewSonic Corporation
N1900w-1E
Confidential - Do Not Copy

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