![background image](http://html1.mh-extra.com/html/viewsonic/ve175-2/ve175-2_service-manual_1021021019.webp)
6.2. MCU
NO
FUNCTION
N
Y
CHECK
C239
MCU 5V
OK?
CHECK
Q108,Q107
OK?
CHECK
I108 PIN7,PIN9
5V?
N
CHECK
R190,C219
OK?
Y
CHECK
12MHz PIN11,PIN12
OK?
N
CHECK
X102,C222,C223
OK?
Y
CHECK
PIN13,PIN14
CLOCK OK?
N
CHECK
I108 TO I101
OK?
Y
CHECK
I108,EVERY TWO
PIN SHORT?
N
CHECK
KEYPAD P105
OK?
N
Replace
Main Board
N
Replace
Keypad
!
!
ViewSonic Corporation
16
Confidential
– Do Not Copy
VE175/b-2