Service Manual

LCDM61NF21(MT02+DE200) Factory Alignment Specification
3.Alignment Procedure
General Description
LCD42/37M61NF21 is designed for Europe, using 37/42 inch Full HD
panel. The main chip is MTK8206. Support 1x RF in, 0.5x SCART, 1XSCART,
1xYPbPr, 1xVGA, 1xside AV include YC input, 2xHDMI,1x headphone out,
1xDVB-T input. The detail please refer the SyRS�
1�Main board alignment
For Analog part
Before power on, please check and make sure the output of U20�U21�
U22�U23,U24�U30�U31 are not shorted to grand.
Supply 5v to P504 and test the output of U20, the normal is 3.3V+/-5%, the
U21 output should be 1.8V+/-5%
Download the SW to the main chip, please see the chapter of how to
download
Check all the function of the all others board on the test tool
For PCMCIA interface
Digital module servicing and debug hints.
Mainly point:
1. Check PCB and each section power supply: 12V, 5V, 1.2V,1.8V ,3.3V.
2. Switch on the power, then measure the signal of output port of video and
audio.
If no output, check the following point:
1) video output of CPU section.
2) 4Mhz clock of the tuner output
3) Output of chip 74AHC1GU04( position U24 of schematic). 4Mhz clock
signal
to CUP(PNX8314).
4) Signal of SDRAM and flash chip when working .
5) Audio DAC ( component’s position U6 of schematic.
By contraries, enter the menu’s manual research item, and set appointed
channel number, check the signal indicator on TV screen.
3. Normal there is a signal level display on the menu.
If no displaying for the signal state indicated information, check the
following point:
1) 4Mhz clock signal of the tuner output,
2) Output of chip 74AHC1GU04(component’s position U23 of
schematic).
3) Else channel decoder schematic section.
4. When it display the signal state indicated information, Press “ok’ button,
and research program. It will not play the program if not get the program