ViewSonic Corporation
16
Confidential
– Do Not Copy
No screen
handler
(2)
Back-light
on
YES
NO
3.3V OK?
YES
NO
START
RP 1 ~RP 6
YES
U1
PIN 30/31 OK?
U17
PIN1~24,34~47,63~77,246~256
YES
A
CHK CKT
SHEET 6
(POWER)
NO
NO
CHKU1
+3.3V2/+3.3V3_PLL
PIN 29/ clamp
NO
CHK U14 & X1
B
YES
VE
7
00-1
VA720-2