Table of Contents
Advertisement
1.
Precautions and Safety Notices ....................................................................... 3
2.
Disassembly Procedure . ................................................................................... 4
3. Key Points' voltage and wave form .................................................................... 6
3.10 Power supply flow chart ..................................................................... 6
3.11 3.3V STB .............................................................................................. 7
3.12 Test point of POWER ON/OFF ............................................................. 7
3.13 Test point of Main board's Main_power. ............................................ 8
3.14 24V-12V test point .............................................................................. 9
3.15 24V-5V . .............................................................................................. 1 0
3.16 5V-3.3V . ............................................................................................. 1 1
3.17 5V-1.2V . ............................................................................................. 1 2
3.18 5V-1.5V . ............................................................................................. 1 3
3.19 Main IC's key test point (Reset circuit) ............................................. 1 4
3.20 BL_ON/OFF (wave form): .................................................................. 1 5
3.21 DIM test point (wave form): ............................................................. 1 6
3.22 LVDS power supply ON/OFF (wave form) ......................................... 1 7
3.23 Power supply for DDR IC ................................................................... 1 8
3.24 Key test point of AMP ....................................................................... 1 8
4. Main unit circuits' elements ............................................................................ 2 0
4.1 TV signal flow ...................................................................................... 2 0
4.2 Intro of MT31B . ................................................................................... 2 0
4.3 Intro of AMP IC . ................................................................................... 2 2
5. Intro of each little board .................................................................................. 2 4
5.1 Key board ............................................................................................ 2 4
5.2 IR board . .............................................................................................. 2 4
6. Troubleshooting Flow Chart . ......................................................................... 2 7
6.1 Green Power LED does not turn on. ...................................................... 2 7
6.2 Abnormal display ................................................................................ 2 8
6.3 Abnormal sound.................................................................................. 2 9
table of contents
2
Advertisement
Table of Contents
