Circuit Description - ViewSonic VA2012wb-1 Service Manual

4. Circuit Description

1. Outline
1.1 Power On/Off, (2) Enter button, up arrow button, down arrow button, (1) MENU button, Volume "+" button,
Volume "-"button and Mute button on the front panel.
1.2 D-sub 15pin connector, DVI-D connector, audio line-in receptacle, and AC-IN are located on the back side
of the cabinet.
1.3 OSD menu includes the following function;
Auto Image Adjust (only active under analog input)
Contrast/Brightness
Input Select
Audio Adjust
Color Adjust
Information
Manual Image Adjust
Setup Menu
Memory Recall
1.4 Contrast and Brightness can be directly controlled with UP / DOWN key.
Audio volume can be controlled with Volume "+" key ,Volume "-" key and UP/DN key when Audio Adjust
1.5
menu is active.
Pushing Mute key can disable audio output.
1.6
2. CONNECTORS
2.1 AC inlet : CEE22 typed connector
2.2 Audio : Line-in,
CN9 1 1
5
4
3
2
Line-in receptacle Line-in receptacle
(Line-in receptacle is green) (Line-in receptacle is green)
2.3 Video signal connector for analog input: 15P Mini D-Sub 2.3 Video signal connector for analog input: 15P Mini D-Sub
16
ViewSonic Corporation
CN6
PIN MNEMONI
PIN MNEMONI
DB15HD
1 1 RV RV
17
2 2 GV GV
3 3 BV BV
4 NC
4 NC
5 5 GND GND
6 6 RG RG
7 7 GG GG
8 8 BG BG
9 9 +5V +5V
10 10 SG SG
11 11 NC NC
12 12 SDA SDA
13 13 HS HS
14 14 VS VS
15 15 SCL SCL
14
SIGNAL
SIGNAL
Red Video Red Video
Green Video Green Video
Blue Video Blue Video
None
None
Ground Ground (DDC (DDC
return) return)
Red GND Red GND
Green GND Green GND
Blue GND Blue GND
+5V (for DDC) +5V (for DDC)
Sync GND Sync GND
None None
DDC Data DDC Data
Horizontal Sync Horizontal Sync
Vertical Sync Vertical Sync
DDC Clock DDC Clock
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