Samsung PN17K Series Service Manual page 33

5-2-4 Visible Retrace
Check white balance adjustment.
G2 voltage is right?
Yes
Blank pulse is on Pin 17 of IC401?
Yes
V_FLB pulse is on
23
Collector of Q303?
Yes
Does approve the Vertical pulse
24
on the CRT Socket G1?
Yes
Done
PN17K*/PN17J*
No
Check D502, D517 and Q501.
No
Check IC401.
No
Check Q303.
No
Check CN102 and CN201.
5 Troubleshooting
WAVEFORMS
5.00V (Q303, Collector)
23
CH1 P-P = 5.00V CH1 RMS = 28.33V
20.00V (CRT Socket, G1)
24
CH1 P-P = 20.0V CH1 RMS = 66.68V
5-15