Section 2. Electrical; Troubleshooting Guide - LG LM-D2540A Manual

SECTION 2. ELECTRICAL

❏ TROUBLESHOOTING GUIDE
P-SENS CHECK
ZD900 voltage check (+5.1V)
NO
YES
IC301 PIN26 check
VKK CHECK
PN903 PIN5, CN302 PIN5 DC -33V check
NO
YES
IC301 PIN51 DC -33V check
D901(+) waveform check
YES
R902 check ZD900 replacement
ZD901(+) -33V check
NO
YES
C919(-) -33V up to check
Q902 TURN ON check
- 2-1 -
NO
D901 replacement
NO
YES
D908, D909 replacement
YES
Q902 replacement
NO
Troubleshooting check
normal