Trouble Shooting - Philips BTM2310 Service Manual

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
NO
Check F300，
LF300,D300~D303
NO
Check R346~R348，T1
NO
Check R310，D306,T1,IC301
Check D308 is with 5.2V
NO
voltage or not
YES
Check D308，IC301，IC302
Check Y1,C17,C23,U4,Q20
NO
etc. components
Check U1,CON8 and U2 on
display board，CON3，FFC
NO
cabel
NO