Service manual

CHK OSD
U7 pin6,24,25
(PUSH KEY SWITCH)
CHK U7
pin 73~94
RETURN
DPWBN5625T8-CHA
Debug Procedure
JP1,
+12V&+5V
INPUT
Does the
screen
Display??
Solution with
No display
(2)
NO
Display
ok ?
YES
Lost some
bits
of RGB??
YES
NO
CHK R66(R ),
R63(G),R60(B)
C37，C34，C24
NO
35
ViewSonic Corporation Confidential
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Do Not Copy Q9-1_Q9b-1