Lcd Tv Description; Interface Connector; D-Sub Pin Distribution - ViewSonic N1750w SERIES Service Manual

1.2 LCD TV description

The LCD TV will contain a main board (include audio), a switching power board (include an inverter board), an IR board and
a function keyboard. The main board and power board will house the flat panel to control logic I
control logic for LCD panel, DC-DC conversion to supply the appropriate power to the whole board and transmitting TTL
level signals into LCD Module to drive the LCD display circuit.
The inverter board will drive the 6 CCFLs (Cold Cathode Fluorescent Tube).
The function keyboard and Remote Control will provide the OSD control signal to the Main Board.

1.3 Interface connector

All signal connections to this product are via external connectors locating at the rear of the product. The specifications of these
connectors are listed in the following table.
External Connector
AC-In
RGB Input
Audio Input (L/R)
Audio Input
Audio Output (R/L)
Headphone Output
Composite Video
Component Video
S Video

1.4 D-Sub pin distribution

Connect the 15-pin color display shielded signal cable to your signal system device and lock both screws on the connector to
ensure firm grounding. The connector information is as follow:
PIN NO.
1.
2.
3.
4.
5.
6.
7.
8.
ViewSonic Corporation
AC Jack 3-male receptacle
Molded-over, shielded, 15-pin subminiature D male plug with75Ω impedance.
Compliance with PC 99 Color Theme. Refer to Appendix B for pin layout.
RCA Jack (White/Red)
3.5 Mini Jack for PC Audio
RCA Jack (Red / White)
3.5 Mini Jack
RCA Jack (Yellow)
RCA jack (Red, Blue, Green)
4 Din Jack
1
6
11
15 - Pin Color Display Signal Cable
DESCRIPTION
RED Video
GREEN Video
BLUE Video
TXD (for ISP)
Ground
Ground-R
Ground-G
Ground-B
Specification
5
10
15
PIN NO.
9.
10.
11.
12.
13.
14.
15.
7
2
C bus, DDC, brightness
DESCRIPTION
NC
Sync Ground
RXD (for ISP)
Serial Data for DDC
HORIZ. SYNC
VERT. SYNC
Serial Clock for DDC
N1750w