Toshiba SD-270EKE3 서비스 매뉴얼 - 페이지 6

{카테고리_이름} Toshiba SD-270EKE3에 대한 서비스 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Toshiba SD-270EKE3 37 페이지.

All output voltages on the power board is 0V or deviated.

All output voltages on

the power board is 0V or

deviated

Yes

Check whether F1 is

blown

Check

there is 300V on C1

Yes

Check whether 100KHz

oscillating

Pin6 of U1

Yes

Check if +5V, , +12V and

-12V are short.

Yes

Check whether the components in the

short-circuit voltage are defected or eroded.

whether

signal

1-3

Yes

Replace F1

Replace C1&C2 if D1, D2, D3, D4

are normal.

Check/ replace U1.

U1(PIN 3 - RC waveform)

Check whether U1 are eroded.

Trouble shooting chart

U1(PIN 8 - Drain waveform)