Philips BTM2310/77 Servicehandleiding - Pagina 20

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10. TROUBLE SHOOTING

A：NO POWER OUTPUT

Check EC300 is with 310V

direct voltage or not

YES

Check switching tube Q300 is

with 310V voltage or not.

YES

Check the fifth feet of IC300

is with around 14V or not.

YES

D308 5.2V,D307 17.5V regular

voltage

B: NO DISPLAY

Check IC303 is with 3.3V

voltage output or not

YES

Check Y1（32.768KHZ）if start

oscillation or not

YES

Check R44,R46,R47 LED display

drive signal CLK,DATE,STB is

normal or not

YES

Display is OK

Check F300，

LF300,D300~D303

Check R346~R348，T1

Check R310，D306,T1,IC301

Check D308 is with 5.2V

voltage or not

YES

Check D308，IC301，IC302

Check Y1,C17,C23,U4,Q20

etc. components

Check U1,CON8 and U2 on

display board，CON3，FFC

cabel