Z-Sustain Troubleshooting - LG 60PY2DR Training Manual

TROUBLESHOOTING

Z-SUSTAIN TROUBLESHOOTING

Check the output of X1 (normal is 100 MHZ). The DC/DC converter makes 5V,Va,Vs,Vset_up,Vsc which
is essential for each B/D. There is no separated DC/DC B/D in model our later plasma models. They
are embedded DC/DC circuits as part of another PCB as seen below.
Y_DRIVE PCB
NOTE:
Use a DVM as shown below set to diode check either forward or reverse bias to check the drive IC.
Check here with DMM (either forward or reverse)
DMM + DMM -
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Plasma Training Troubleshooting