Service Manual
Page 2
... appeared brightly in the screen when the LCM Displayed with bright pattern. - LCD CHARACTERISTICS Type Size Pixel Pitch Color Depth Electrical Interface Surface Treatment Operating Mode Backlight Unit : TFT WSXGA LCD : 20.1inch : 0.258(H) x 0.258(V) : 8-bit, 16,777,216 colors...Min) 7. CONTENTS SPECIFICATIONS 2 PRECAUTIONS 3 TIMING CHART 7 DISASSEMBLY 8 BLOCK DIAGRAM 9 DESCRIPTION OF BLOCK DIAGRAM 10 ADJUSTMENT 12 TROUBLESHOOTING GUIDE 14 WIRING DIAGRAM 18 EXPLODED VIEW 19 REPLACEMENT PARTS LIST 21 SCHEMATIC DIAGRAM 26 SPECIFICATIONS 1. Viewing Angle by Contrast Ratio...
... appeared brightly in the screen when the LCM Displayed with bright pattern. - LCD CHARACTERISTICS Type Size Pixel Pitch Color Depth Electrical Interface Surface Treatment Operating Mode Backlight Unit : TFT WSXGA LCD : 20.1inch : 0.258(H) x 0.258(V) : 8-bit, 16,777,216 colors...Min) 7. CONTENTS SPECIFICATIONS 2 PRECAUTIONS 3 TIMING CHART 7 DISASSEMBLY 8 BLOCK DIAGRAM 9 DESCRIPTION OF BLOCK DIAGRAM 10 ADJUSTMENT 12 TROUBLESHOOTING GUIDE 14 WIRING DIAGRAM 18 EXPLODED VIEW 19 REPLACEMENT PARTS LIST 21 SCHEMATIC DIAGRAM 26 SPECIFICATIONS 1. Viewing Angle by Contrast Ratio...
Service Manual
Page 14
NO POWER NO POWER (POWER INDICATOR OFF) 1 CHECK J101 VOLTAGE PIN6, 7, 9(5V)? TROUBLESHOOTING GUIDE 1. YES CHECK DATA LINE CONNECTION(U403, U401) NO CHECK POWER BOARD, AND FIND OUT A SHORT POINT AS OPENING EACH POWER LINE NO CHECK 3.3V, 5V LINE (OPEN CHECK) NO CHECK U402 VCC X-TAL, RESET Waveforms 1 J101-#6,7,9(5V) 2 U403-#32(3.3V) 3 U401, R435, R436-#3, 4 - 14 - YES CHECK 2 U403 PIN32 Voltage (3.3V) ? YES CHECK KEY CONTROL CONNECTOR ROUTINE YES U401, R435, R436 3 PIN3, PIN4 VOLTAGE REPEATED AS PULSE SHAPE?
NO POWER NO POWER (POWER INDICATOR OFF) 1 CHECK J101 VOLTAGE PIN6, 7, 9(5V)? TROUBLESHOOTING GUIDE 1. YES CHECK DATA LINE CONNECTION(U403, U401) NO CHECK POWER BOARD, AND FIND OUT A SHORT POINT AS OPENING EACH POWER LINE NO CHECK 3.3V, 5V LINE (OPEN CHECK) NO CHECK U402 VCC X-TAL, RESET Waveforms 1 J101-#6,7,9(5V) 2 U403-#32(3.3V) 3 U401, R435, R436-#3, 4 - 14 - YES CHECK 2 U403 PIN32 Voltage (3.3V) ? YES CHECK KEY CONTROL CONNECTOR ROUTINE YES U401, R435, R436 3 PIN3, PIN4 VOLTAGE REPEATED AS PULSE SHAPE?