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Service Manual
Model No.:
No sound No picture
No
Verify if the Power has
5Vstb output
Yes
Change the
Power supply
Verify if CN4 Pin3/4 has 5V
input
Yes
Verify if CN2 Pin1 has 12V
input
Yes
Verify if DC/DC convertors have
the right output
Yes
No
No
No
Change Power board
Change Power board
Change corresponding
DC/DC convertor
Still having
Change
Change the software
41
Problems
Mainboard
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 ...