![background image](http://html.mh-extra.com/html/viewsonic/vg170mvlcds23724-3w/vg170mvlcds23724-3w_service-manual_1021066013.webp)
YES
YES
OK
YES
NO
YES
NO
OK
OSD CKT
END
CHECK OSD
CABLE
CHECK U2 PIN
8,9,13,16,25,33,34
START
OSD CKT
CHECK OSD SWITCH
S1~S8 CKT
REPLACE U2
REPLACE
OSD SWITCH
YES
YES
NO
YES
START
CHECK PNL_VCC,FB2
END
CHECK POWER CKT
+5V
PANEL POWER CKT
PANEL POWER CKT
MENU/KEY
GPIO17(pin 13)
UP/KEY
GPIO16(pin 9)
SELECT/KEY
GPIO22(pin 8)
DOWN/KEY
GPIO21(pin 16)
POWER/KEY GPIO9
(pin 33)
VOLUMN-UP/KEY
GPIO10(pin 34)
VOLUMN-DOWN/KEY
GPIO6(pin 29)
MUTE/KEY
GPIO2(pin 25)
10
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
VG170m