Unit Circuit Analysis and Testing
----Backlight and Dimming
Dimming waveform when
“Backlight” is set to 0
in setting menu.
(“Nature Light” off)
-32-
①
Pin J4 of U400 sends out a high or low level, across R003, then
directly send to power board through pin12 of P001 on the main board,
control the backlight on or off.
②
Pin B8 of U400 sends out PWM signal, across R006, then directly
sends to power board through pin11 of P001 on the main board, adjust
back light brightness.
Summary of Contents for MS901K-AP Series
Page 1: ...Training Material of MS901K AP Chassis...
Page 4: ...MS901K AP Series Menu Display 2 Homepage 1 Homepage 2 All Apps 3D Games...
Page 5: ...MS901K AP Series Menu Display 3 Menu Picture Setting Source Settings...
Page 15: ...Chassis Block Diagram MS901 13 DDR3 1V5 DDR2 1V8 DDR1 2V5...
Page 16: ...Chassis Block Diagram 6M40 14...
Page 17: ...Power Supply Block Diagram 15...
Page 18: ...Power Supply Block Diagram 16...
Page 25: ...Key Test Point DC to DC 24V to 12V 23 L007 U004...
Page 26: ...Key Test Point DC to DC 24 24V to 5V L001 Q004 U005...
Page 27: ...Key Test Point DC to DC 25 24V to 6M40_5V L1103 U1105...
Page 31: ...Key Test Point 29 U101 5V to TU_3V3 LDO...
Page 32: ...Key Test Point 30 Q1401 Panel Power Q1402...
Page 35: ...Unit Circuit Analysis and Testing Backlight 100 Backlight 50 33 Backlight and Dimming...
Page 47: ...Trouble Shooting No Picture 45...
Page 48: ...Trouble Shooting No Sound 46...
Page 49: ...Trouble Shooting Abnormal Picture 47...
Page 50: ...Trouble Shooting Network Fault wired 48...
Page 51: ...Trouble Shooting Network Fault wireless 49...
Page 59: ...Thank you...
