Samsung PN15VT / VO Service Manual page 32

5-2-4 Visible Retrace
Check white balance adjustment.
G2 voltage is right?
Yes
Blank pulse is on Pin 3 of IC401?
Yes
V_FLB pulse is on
22
Collector of Q502?
Yes
Does approve the Vertical pulse
23
on the CRT Socket G1?
Yes
Done
PN15VT/VO
PN15HT/HO
No
Check D502 and Adjust G2.
No
Check IC401.
No
Check Q502.
No
Check CN102 and CN201.
5 Troubleshooting
WAVEFORMS
22 5.00 V (Q502, Collector)
23 50.00 V (CRT Socket, G1)
5-15