VERT0CAL DEFLECTION CIRCUIT DEFECTS
There is a horizontal line on
the screen
Check and replace R127 (at pin 20 of IC101),
Check 16 VDC at pin 3 of IC501. NO C126 (at pin 21 of IC101), R526, D513, C527,
R521.
YES
Check 35 VDC at pin 6 of IC501. Flyback lines are visible. Check and replace NO
R527, D512, C526, R522, C517.
YES
If R122 is open IC501 becomes defective and
Check 2.2 VDC at pin 1 of IC501. 16 VDC components fail. Check them before NO
replacing IC501.
YES
Check 2.2 VDC at pin 2 of IC501. Lower half of the screen is black. Check and NO
replace R123 and IC101.
YES
NO
Check 7.4 VDC at pin 7 of IC501. A Horizontal line is visible. Check and replace
Check 7.2 VDC at pin 4 of IC501. R518, R519 and IC501.
YES
Replace IC501 |