Samsung AQ17KS Service Manual page 35

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
AQ17KS
No
Check D502, D517 and Q501.
No
Check IC401.
No
Check Q303.
No
Check CN102 and CN201.
5 Troubleshooting
WAVEFORMS
23 5.00V (Q303, Collector)
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