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6. Level 2 Circuit Board and Standard Parts Replacement
6.1. Trouble Shooting Guide
When power on fail happened, please check as following
:
1. All wire cable connected correctly?
System power on?
Check U38
、
U39
、
U43
output voltage
(1.8V,3.3V,2.5V) is correct
Check which one is fail?
Back light on?
Yes
No
1. Check wire cable connection between
back light and power board
Yes
No
Input signal display
No
OSD image ok?
Yes
No
Check J24 LVDS cable connection
Check input cable
1. Check IR/Lign wire cable
、
Audio wire
cable or Sensor wire cable to check
which one is short to cause this fail
2. Check keypad board NG or OK
No
Keypad LED ON?
1. Check wire cable connection between
main board and keypad
2. Check VCC 5V in
No
Yes
Yes
Audio ok
Function ok
No
1
、
Check audio input cable connection
2
、
Check wire cable connection
between audio board and main board
No
Check main board function
Yes
Yes
Summary of Contents for DV650C
Page 15: ... 15 3 4 2 OSD Table Generic for Version 2 4 1 ...
Page 21: ... 21 3 5 Packing ...
Page 22: ... 22 4 Disassembly Assembly 4 1 Exploded View ...
Page 46: ... 46 5 4 OSD Operation Guide ...
Page 47: ... 47 ...
Page 65: ... 65 Appendix 3 I F Board ...
Page 66: ... 66 ...
Page 67: ... 67 ...
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