Nexgen Mediatech Inc.
NO
VER. A1
TITLE
Level 1 Service Manual
PAGE
23/30
9 . Upgrade System Bios
Explanation of Programmable ISP (In System Program)
Use designed ISP tool to upgrade system BIOS. To press Ch- and Ch+ on key pad
simultaneously, to get into factory mode, to choose ISP item then change 0 to 1 by vol.
Pad.
9.1 Preparation before upgrade
Power switch
RS232 port
DC12(V)
ISP port
(D-Sub15)
9.2 Use RS-232 signal line to connect RS 232 OUT port of PC and the RS 232 IN PORT
of ISP tool. Use RGB signal line to connect VGA OUT port of ISP tool and VGA IN
port of LCD TV. Power on ISP tool, shown as below.
3. Plug in
DC power
supply
4. Power on
1. Connect to
RS232 OUT
port of PC
2. Connect to
VGA IN port
of LCD TV
9.3 The CPU used for processing ISP need to burn LD0415.BIN to the LDROM of CPU.
(Has burned before shipping)
9.4
Need to enter factory mode by pushing “747+enter” button on remote control to
execute ISP mode.
23
