
B-70315EN/02 5.TROUBLESHOOTING
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ALM No.4063
RF POWER SUPPLY / LASER GAS
This message appears when the laser power supply unit becomes
abnormal or performs protective operation. The power supply
unit performs protective operation even if an error occurs in other
than the power supply unit itself. This alarm will recur after
replacement of the power supply alone without eliminating the
root cause.
Alarm output condition
This alarm is issued if, after the LRDY state is established in the
sequence, an alarm signal is sent from the power supply unit, and any of
the power supply operation status signal becomes "0". Note that a
power supply that is not set with parameter No. 15025 or 15027 is not
checked.
Related parameters
PRM.15025,15027 Power supply selection
Related data
DGN.966 Power supply unit operation status
DGN.970 Power supply unit selection signal
DGN.974 Power supply unit alarm display
(1) Preliminary inquiry
No. Check item Cause of trouble, Solution
1 Checking the
faulty power
supply
1) When the alarm is issued, check the number of
the faulty power supply on the diagnosis screen.
2) Check the LED that lights on the faulty power
supply (see Subsection 5.3.1).
2 Checking
parameters
Confirm that all the parameters described in the
attached parameter sheets are correctly set.
In case there exists any error, correct it.
3 Checking the
discharge
tubes
1) Check for looseness or positional deviation in
the fixtures for mounting the discharge tubes,
and if any problem is found, take appropriate
action.
2) Check whether the electrode has separated, and
replace it.
3) Check whether the inside and outside of each
discharge tube is dirty, and clean it.
4) Check each discharge tube for a crack, and
replace it.
5) Check the O-ring of each discharge tube for
damage, and replace it.
4 Checking the
trigger
electrodes
Check whether the electrode portion of the trigger
electrode is discolored, and replace it.
5 Checking the
matching box
1) Check whether the matching box fan stops, and
replace it.
2) Check whether any coil in the matching box
becomes black, and replace it.