Barco Galaxy NH-12, Service Manual

Page: 77 / 146

7. Electronic parts and servicing procedures
7.7.4 Construction of the input module
Overview
• Analog input layer
• DVI / D15 input layer
• Output and communication layer
• Stereo input/output layer
• Optional input layer
7.7.4.1 Analog input layer
Overview
• Description of the analog input layer
• Removing the analog input layer
• Installing the analog input layer
7.7.4.1.1 Description of the analog input layer
Description
In the analog input layer , the analog signal is converted into a digital one.
• the data signal is converted into 48 bits in the ADC
• the video signal is converted into 10 bits in the decoder and ADC
The analog input board can process one data and one video source at the same time.
Schematic overview
ADC
DECODER
(AGC)
Clamp
AMP
Clamp
AMP
Clamp
Clamp
R
G
B
H
V
VIDEO
Buffer
1
80
1
80
RGB 48 bits
Video 10bits
Analog Input Layer
S-VIDEO
..
.
..
.
Image 7-74
Analog input layer
7.7.4.1.2 Removing the analog input layer
Necessary tools
Torx screwdriver T10
How to remove the analog input layer?
1. Remove the input module (see considering chapter)
2. Remove the front screws of the analog input layer
R59770141 GALAXY NH-12 20/02/2008 73