LG / GOLDSTAR DT-7000
Instrukcja Serwisowa

NO RASTER NO SOUND Check +B voltage at J306. no 140V

no

Is there the square waveform at pin4 of P101 (H-out)

Is the voltage at pin 24 of IC01 5V?

0V

Check the part of Digital PCB ASSY

yes

Check/Replace IC803, D826, 827, 828, 829, T805, T801, 804 and Fuse (FC02). NG

Check the voltage of C834.

yes Check/Replace D801. 230~380V no Is the waveform at the collector of Q402 normal? Check the voltage at pin9 of IC801. Lower than 6V

Check/Replace Q401, T401and Q402. yes OK

Check/Replace D802, D803, Q801 and IC801.

Check/Replace T701 and CONNECTORS.

Check/Replace IC802, IC804, D810 and R832.