Sharp 910N 5-2-1 No Video (ANALOG)

5 Troubleshooting

MJ15AS*/MJ17AS*/MJ19AS*/

MJ15BS*/MJ17BS*/MJ19BS*

5-3

X400 oscillate properly?

5-2-1 No Video (ANALOG)

1Replace or check related circuit.

Check signal cable connection and power.

Yes

Is there R, G, B input at R100,

R101 and R103? Check input part.

Yes

Is there Hsync, Vsync waveform

at Pin 100, 1 of IC 400?

Check IC400 and related circuit.

Yes

Is there Hsync, Vsync waveform

at Pin 43, 44 of IC 200?

Check IC200 and related circuit.

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 BL_EL 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