Step 1.
Check if 24V supplied to the SYS
board.
⇒
If supplied, replace the SYS board.
Step 2
. Check 24V (CN125) and SG on.
Confirm if the SYS board is short circuited
⇒
If shorted, go to
Step 3
⇒
If not shorted, go to Step 4.
Step 3
. Check if the power supply is short
circuited as in Step 2 by pulling
disconnecting the supply harness (CN125)
on the SYS board.
⇒
If shorted, replace the
SYS board
.
⇒
If not shorted, go to Step 4.
Step 4. Check if the fuse
(F203)
on the
LVPS
is open circuited.
⇒
If open, replace the LPVS.
⇒
If not open, go to Step 5.
Step 5.
Check and replace power supply
Harness
Step 6.
Replace LVPS and SYS board in
order.