Section 2. Electrical; Troubleshooting Guide - LG LX-D2640 Service Manual

SECTION 2. ELECTRICAL

❏ TROUBLESHOOTING GUIDE
P-SENS PART CHECK
ZD 601(+) Voltage check
YES
IC301 26PIN PATTERN Check
VKK CHECK
PN601 31pin -27V check
YES
Pattern check front pcb Ass'y
ON
D602(+) rectification waveform check
ZD601 replacement
ON
C668(-) DC -32V check
D602(-) DC -27V check
A601 EMITTER DC -27V check
Pattern check
- 2-1 -
ON
YES
ON
YES
ON
YES
ZD602 check replacement
ON
YES
D602 Replacement
D603, D605 replacement
Q601 replacement