Sharp LC-15C2E, Руководство по обслуживанию, Страница: 12 / 47

LC-15C2E
12
TROUBLE SHOOTING TABLE
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Check all the settings microprocessor's adjust process menu.
Do F2, F3 and F4 function?
Are T701's secondary outputs, +38V, +16V, +9V, +5V and -8V normal?
Remove F2, F3 and F4 and check the load side. Is there short-circuiting?
Is there short-circuiting of T701 primary side periphery, Q751, Q753 and P901.
Replace F2, F3 and F4.
Check P901 and connection cable.
Is T701's primary oscillator waveform normal?
Check T701's secondary load.
Yes
Yes
No
No
No No
Yes
Fluorecent lamp failure to light up
Does F1 function?
Is the pin 34 of IC1201 in the "H" state?
Is the Q7603 short-circuiting?
Is there short-circuiting of T5701 and T5702 primary side periphery, Q751~Q753.
Yes Yes
No No No
Yes
Replace the fluorecent lamp with new one and check again.
Yes
Check the OFL1 line, IC1201 and their peripheral parts.
Check Q7603 and their peripheral parts.
Check T5701, T5702, Q5701~Q5703 and connection cable.