AOC AOC2241VG

Service Manual AOC2241VG
39
Key Board---OSD no working
9.3 Writing IC Roft program step
IC：main board Scaler U401: NT68668, U402 PM25LV020-100SCE 2MB SOIC-8
Step1：Connection
1. Connect one end of the print line PC, the print line to connect the other end of ISP programming card（715GT034-B）；
2. Will be burning machine to connect ISP D-SUB；
3. Connect 12V ,then Burn Card Connection as shown below
Check flow chart
For the key board
OSD is unstable or not
working
Is Key Pad Board connecting
normally?
Is Button Switch normally?
Is Key Pad Board normally?
Check Main Board
Connect Key Pad Board
Replace Button Switch
Replace Key Pad Board
OK
NG
NG
NG
OK
OK