Memorex MLT2022SM Manual

Index of content
1.Speacifi cations ........................................ 2
1.1 TV System ......................................... 2
1.1.1 Introduction .................................. 2
1.1.2 Key Features ............................... 2
1.1.3 System Diagram .......................... 3
1.2 Panel speacifi cations ......................... 3
1.2.1 General spec brief ....................... 3
1.2.2 Optical spec brief ......................... 4
1.3 I/O interface ....................................... 5
1.3.1 Overview ..................................... 5
1.3.2 Video Functionality ...................... 6
1.3.3 Audio Functionality ...................... 6
1.3.4 Top keypad .................................. 6
1.4. Power ............................................... 7
1.4.1 External power supply ................. 7
1.4.2 Power switch ............................... 7
1.4.3 Power state ................................. 7
1.4.4 Working environment .................. 7
1.5. Channel management ...................... 7
1.5.1 Air/CATV ...................................... 7
1.5.2 Close Caption/ Vchip ................... 8
1.5.3 Miscellaneous .............................. 8
1.6. Safety & EMI test .............................. 8
1.6.1 Safety .......................................... 8
1.6.2 EMI .............................................. 8
1.7. Appearance & Carton ....................... 8
1.7.1 LCD TV dimension ..................... 8
1.7.2 Package dimension ..................... 8
1.7.3 Weight ......................................... 9
1.7.4 Packing detail .............................. 9
1.8. Reliability test ................................. 10
1.8.1 Temperature test ....................... 10
1.8.2 Humidity test .............................. 10
1.8.3 Thermal shock test .................... 10
1.8.4 Non Operating Random Vibration Test
(Packaged) ......................................... 10
1.8.5 Packing Drop Test ..................... 10
Copyright©2005 Aplus Technic® All Rights Reserved
D_Sub ADC
VGA INPUT
JACK Decoder
3bit
YCbCr / YPbPr INPUT
Tuner
BOX
VChip
Close Caption
AV
SV
AV
SV
VGA
YCbCr / YPbPr INPUT
2.Drawing ................................................. 11
3.Dis-Assembly & Assembly ..................... 13
3.1.Stand .............................................. 13
3.2.Stand bracket ................................. 13
3.3.Back cover ...................................... 13
3.4.Keypad wire .................................... 13
3.5.VGA screws .................................... 14
3.6.I/O and EMI meael screws ............. 14
3.7.EMI metal ....................................... 14
3.8.Front cover ..................................... 14
3.9.Main board ..................................... 15
3.10.Inverter PCB ................................. 15
3.11.Panel high-voltage cables ............ 15
3.12.LCD metal .................................... 15
Pass the cables ..................................... 15
3.13.Top keypad ................................... 16
3.14.Keypad semi kit fi xture ................. 16
3.15.Speakers ...................................... 16
4.FAULT FINDING TREE ......................... 17
Main page of fault fi nding tree ............... 17
Power supply repair fl owchart ............... 18
OSD display repair fl owchart ................. 19
PC mode repair fl owchart ...................... 20
TV mode repair fl owchart ...................... 21
AV, SV and YCbCr/ YPbPr mode repair
fl owchart ................................................ 22
Audio repair fl owchart ............................ 23
5.SDK BOM .............................................. 24
1
Circuit Diagram
24bit
MCU Keypad & IR
A port
Video Image
Processor
24bit
B port
LVDS
IC
8bit 24bit
Video
RA port
Decoder1 De-Interlace
Audio
Speaker
Amplifier
Audio Headphone
Earphone Jack
Processor Driver
PANEL
8bit