Sharp 910N 5-2-2 No Video (DIGITAL)

5 Troubleshooting

MJ15AS*/MJ17AS*/MJ19AS*/

MJ15BS*/MJ17BS*/MJ19BS*

5-5

X400 oscillate properly?

5-2-2 No Video (DIGITAL)

1Replace or check related circuit.

Check signal cable connection and power.

Yes

Is there R, G, B input at

R110, R112, R114, R111,

R113 and R115?

Check input part.

Yes

Is there waveform

at R11, R117?

Check input part.

Yes

Does the output signal appear

at Pin 17~20, 22~27 of CN400? Check IC400 and related circuit.

Yes

There are DC 5V at Pin 1, 2

and 3 of CN400?

Check the panel EN signal at R222

and BLEL signal at R603.

Yes

Replace LCD Panel.

Contents

Main TFT-LCD MONITOR Manual SERVICE Page 1-1 1-1-1 Warnings 1-1-2 Servicing the LCD Monitor 1-1-3 Fire and Shock Hazard 1 Precautions 1-1 Safety Precautions 1-2-1 General Servicing Precautions 1 Precautions 1-2 MJ15AS*/MJ17AS*/MJ19AS*/ 1-3 Electrostatically Sensitive Devices (ESD) Precautions 1-2 Servicing Precautions 2 Product Specifications 2-1 MJ15AS*/MJ15BS*/MJ17AS*/MJ17BS* Specifications 2-2 MJ19AS*/MJ19BS* Specifications 2-3 Pin Assignments 2-4 Timing Chart 3 Disassembly and Reassembly 3-1 Disassembly 3-2 Reassembly 4-1 Required Equipment 4-2 Automatic Color Adjustment 4-3 DDC EDID Data Input 4-4 OSD Adjustment When Replacing Panel 4 Alignments and Adjustments 4-6 Service Function Spec. 4-6-1 How to Display Service Function OSD 4-6-2 How to Control Service Function OSD 4-6-3 How to Control Service Function OSD 4-6-4 How to Control Service Function OSD Page 5 Troubleshooting 5-1-1 No Power (MJ15A*/MJ15B*) 5-1-2 No Power (MJ17A*/MJ19A*/MJ17B*/MJ19B*) 5-2-1 No Video (ANALOG) Page 5-2-2 No Video (DIGITAL) Page Page Page Page Page Page Page 7-1 7 Electrical Parts List 7-1-1 MJ15AS* Main PCB Parts 7-2 MJ15AS*/MJ17AS*/MJ19AS*/ 7-3 7-4 MJ15AS*/MJ17AS*/MJ19AS*/ 7-1-2 MJ15AS* Others 7-2-1 MJ17AS* Main PCB Parts 7-5 7-6 MJ15AS*/MJ17AS*/MJ19AS*/ 7-2-2 MJ17AS* Others 7-7 7-3-1 MJ19AS* Main PCB Parts 7-8 MJ15AS*/MJ17AS*/MJ19AS*/ 7-9 7-10 MJ15AS*/MJ17AS*/MJ19AS*/ 7-3-2 MJ19AS* Others 7-11 7-12 MJ15AS*/MJ17AS*/MJ19AS*/ 7-4 MJ15BS*/MJ17BS*/MJ19BS* Different Circuit Part List 8 Block Diagram INVERTER IP BOARD TMDS INVERTER IP BOARD (PC)DIGITAL 10-1 X Y 10-2 MJ15AS*/MJ17AS*/MJ19AS*/ 10-2 MJ15BS* DIGITAL PCB TRANSISTOR 10-3 10-3 MJ17AS*/MJ19AS* ANALOG PCB 10-4 MJ15AS*/MJ17AS*/MJ19AS*/ 10-4 MJ17BS*/MJ19BS* DIGITAL PCB TRANSISTOR 9-1 9 Wiring Diagram CN102 CN200 CN400 CN600 CN101 Page 11-1 11 Schematic Diagrams B-IN_A G-IN_A R-IN_A SCL_DDC_A