![background image](http://html1.mh-extra.com/html/viewsonic/vg500b-1/vg500b-1_service-manual_1021189016.webp)
Check if Audio
jack properly insert
Yes
Press mute key again
to release
YES
NO
Check if CN701 is
connected to CN101
properly
No
Replace U701
U701 #1 voltage is
10.5V
Yes
YES
No sound
Check if mute key
is pressed
Check U801 output
#7 is normal
U803 #8 is 10.5V
No
Replace U801
Replace U803
YES
No
Check U701 output
#2,#4,#10,#12 are
normal
No
ViewSonic Corporation
13
VG500b-1
Confidential
– Do Not Copy
Summary of Contents for VG500b-1
Page 34: ...12 PCB LAYOUT ViewSonic Corporation 31 VG500b 1 Confidential Do Not Copy...
Page 35: ...ViewSonic Corporation 32 VG500b 1 Confidential Do Not Copy...
Page 36: ...ViewSonic Corporation 33 VG500b 1 Confidential Do Not Copy...
Page 37: ...ViewSonic Corporation 34 VG500b 1 Confidential Do Not Copy...
Page 38: ...ViewSonic Corporation 35 VG500b 1 Confidential Do Not Copy...