BEKO 14.2 CHASSIS
Instrukcja Serwisowa

POWER SUPPLY DEFECTS (II)

No operation Stand-by Voltages OK

Check 4.2 VDC at pin 6 of IC101

NO

Check connection to R409 and R641

YES NO

Switch on the TV set. Check voltage 0.05 V pin 6 of IC101 and 0.28 V at R439

Check the voltage 3.3 V at pins 59, 66 of IC101 and pin 8 of IC402

YES

Check and replace IC101

POWER SUPPLY DEFECTS (III)

Stand-by Voltages are abnormal

Check the standby voltage (it should be 14.7V). This voltage is 20V-50V.

YES

Check and replace R617, R641, R626, T603, ZD603, T604, T605, T607, C621, C623

NO YES

Standby voltage is around 160 V instead of 14.7V

Check the voltage 4 VDC at the cathode of D615. Check and replace T605 and PH601