Harman Kardon BDS 280S - Page 19

5-7 Trouble shooting Chart
Tuner FM does not work
Tuner FM does not work
Go
Check the DVD mode is
OK,audio output is ok
Yes
Check Tuner module
pin5 supply voltage is
+3.3V
Replace the Main board
No
Check Main board tuner voltage supply
circuit.
No
Change the Tuner module
No
Check Tuner module
pin7,pin8,L/R output
Yes
Yes
Check the U203 is
working normal
No
Yes
Replace U203
Replace Main Board