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ITC2
CHASSIS
R402/ R407/ R422/ R435/ R452/ R457/ R472/ R488
Troubleshooting
3-2-1. DD Con
Start
DDCON
Check voltage at JL6003
is it 3.3V?
OK
Check F6001
& F6002
NG
No
Fuse
Yes
Check voltage at JL6000
No
Change BB
is it 1.2V?
Yes
OK
Change BB
board
DDCON
Check voltage at JL6002
Is it 1.5V?
Check voltage at JL6012.
Is it 12V?
Check F6003.
Is it ok.
No
Yes
NG
No
Change BB
board
Check voltage at JL6005
is it 5V?
No
Yes
NG
Change BB
board
Fuse
Yes
After checking, take note of
NG condition & change BB board
12
NG condition & change BB board
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