54
13.
TROUBLESHOOTING
A.
NO BACKLIGHT PROBLEM
Problem:
If TV is working, led is normal and there is no picture and backlight on the panel.
Possible couses:
Backlight pin, dimming pin, backlight supply, stby on/off pin
BACKLIGHT_ON/OFF pin should be high when the backlight is ON. R23 must be low when the
backlight is OFF. If it is a problem, please check Q35 and the panel cables. Also it can be tested in TP310 in
main board.
Summary of Contents for 55293DLB
Page 1: ...HITACHI 55HK6T64U 55293DLB MB100 SERVICE MANUAL ...
Page 5: ...4 Table Pin Functions ...
Page 6: ...5 B M88TS2022 SATELLITE TUNER Pin Assigment ...
Page 9: ...8 Pin descriptions and functions Figure TAS5719 Pin descriptions ...
Page 10: ...9 Table TAS5719 Pin Functions ...
Page 15: ...14 Table Electrical Characteristics Figure PHP Package Top View ...
Page 16: ...15 Table Pin Functions ...
Page 23: ...22 Figure Pin Description Table Pin functions ...
Page 25: ...24 Table Recommended operating conditions Figure Pin Description ...
Page 31: ...30 5 MICROCONTROLLER MSTAR MSD95C0H General Description ...
Page 32: ...31 Features ...
Page 33: ...32 ...
Page 34: ...33 ...
Page 35: ...34 ...
Page 36: ...35 ...
Page 37: ...36 Table Recommended operating conditions ...
Page 38: ...37 6 VIDEO BACK END PROCESSOR MSTAR MST7410DY General Description ...
Page 39: ...38 Table Recommended operating conditions Features ...
Page 40: ...39 ...
Page 41: ...40 Block Diagram Figure Block diagram ...
Page 50: ...49 Table Pin description 11 DEMODULATOR STAGE MSB1240 DVB T2 Key Features ...
Page 51: ...50 General Description ...
Page 52: ...51 Block Diagram ...
Page 53: ...52 Pinning Absolute Maximum Ratings ...
Page 63: ...62 ...
Page 65: ...64 15 PLACEMENT OF BLOCKS ...