Service Manual
Page 2
... 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 ...Speed : Full-12Mbps, Low-1.5Mbps High Speed : 480Mbps(USB 2.0) 10. Total amount of minimum specification -2- 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 : LVDS : Anti-Glare, Hard...
... 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 ...Speed : Full-12Mbps, Low-1.5Mbps High Speed : 480Mbps(USB 2.0) 10. Total amount of minimum specification -2- 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 : LVDS : Anti-Glare, Hard...
Service Manual
Page 14
TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) 1 CHECK J101 VOLTAGE PIN6, 7, 9(5V)? 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? 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 -
TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) 1 CHECK J101 VOLTAGE PIN6, 7, 9(5V)? 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? 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 -