Sony GN3UN - Main Power Error Troubleshooting (2 x Blinking)

18
LK Board
2 times
Blinking
Change LK-
Board
LK-Board
Check DC voltage at
Q6020/ *Q6022
18V – 22.5V?
*Typical: 19.5V
Yes
No
Change LK-
board
Change
Adaptor
No
Adaptor
Take out adaptor
and check the output voltage.
18V – 22.5V?
(Refer Figure 1)
*Typical: 19.5V
Yes
Figure 1: How to check adaptor’s output
voltage.
+ve
-ve
Ensure that
+ve probe is
touching the
needle.
*For LK2
3a.1. 2x Blinking – Main Power Error