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Service Manual
Model No.:
9-3. Mainboard Failure Check
No picture but have sound
Check the power output
No
Change the Power Board
Yes
Check the CN2 (BLO)
Backlight on/off
Yes
No
There’s something wrong
with FRC
Verify if the DC/DC
convertor can output the
right Voltage,
No
Change the corresponding
DC/DC
QB3 output 5V
Yes
No
Verify if
QM1
output
Change
the QM1
Yes
Still having
problems
Change Panel
Change LVDS wire
39
55DR3505
Summary of Contents for 55dr3505
Page 10: ...Service Manual Model No 2 2 External pictures four faces Front Side Up Side 9 55DR3505 ...
Page 11: ...Service Manual Model No Right Side Back Side 10 55DR3505 ...
Page 18: ...Service Manual Model No 17 55DR3505 ...
Page 31: ...Service Manual Model No 7 2 Wiring Connection Diagram 30 55DR3505 ...
Page 37: ...Service Manual Model No 9 2 Mainboard IC Introduction Top view 36 1 2 3 4 5 6 7 8 55DR3505 ...
Page 38: ...Service Manual Model No Bottom view 37 55DR3505 ...