LG / GOLDSTAR RI28CZ10RX
Manual de Servicio

VERTÄ°CAL DEFLECTION CIRCUIT DEFECTS

There is a horizontal line on the screen

Check 16 VDC at pin 3 of IC501.

NO

Check and replace R127 (at pin 20 of IC101), C126 (at pin 21 of IC101), R526, D513, C527, R521.

YES

Check 35 VDC at pin 6 of IC501.

NO

Flyback lines are visible. Check and replace R527, D512, C526, R522, C517.

YES

Check 2.2 VDC at pin 1 of IC501.

NO

If R122 is open IC501 becomes defective and 16 VDC components fail. Check them before replacing IC501.

YES

Check 2.2 VDC at pin 2 of IC501.

NO

Lower half of the screen is black. Check and replace R123 and IC101.

YES NO

Check 7.4 VDC at pin 7 of IC501. Check 7.2 VDC at pin 4 of IC501.

A Horizontal line is visible. Check and replace R518, R519 and IC501.

YES

Replace IC501