B-70315EN/02 7.UNITS
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(i) When the base discharge state is entered, record the RFI
value. -------------------------------------------------------------(A)
(3) Base discharge adjustment (C4000-E)
(a) Start the oscillator, and wait until the gas pressure is
stabilized in the base discharge state.
(b) Then, check that all discharge tubes are continuously
discharging. If a discharge tube stops discharging, turn
VR11 of the power supply corresponding to the discharge
tube clockwise until it turns on.
(c) Adjust VR11 of the power supply unit so that all discharge
tubes are in the state present immediately before flashing by
main discharge occurs.
(d) Record the value of RFI --------------------------------------- (a)
(e) Adjust the RFI value so that the value recorded in (d) plus
70 mA is obtained for power supply No. 1 and that the
value recorded in (d) minus 70 mA is obtained for power
supplies No. 2 through 4.
(f) Turn off the discharge start signal (HV ON), then set 2790
as the bias command value in PRM 15223 (the current value
minus 60).
(g) Check that trigger electrode discharge lasts for five minutes
in the base discharge state. If discharge is turned off, turn
VR11 of the power supply clockwise slowly, and increase
the value of RFI by 4 mA. Turn the discharge start signal
(HV ON) off then back on, then repeat this operation until
discharge is maintained for five minutes.
(h) Turn off the discharge start signal (HV OFF), then reset the
bias command value in PRM 15223 to the original value.
(i) When the base discharge state is entered, record the RFI
value. -------------------------------------------------------------(A)
(4) Base discharge adjustment (C5000-E, C6000-E)
(a) Start the oscillator, and wait until the gas pressure is
stabilized in the base discharge state.
(b) Then, check that all discharge tubes are continuously
discharging. If a discharge tube stops discharging, turn
VR11 of the power supply corresponding to the discharge
tube clockwise until it turns on.
(c) Adjust VR11 of the power supply until main discharge
disappears in all discharge tubes.
(d) Record the value of RFI --------------------------------------- (a)
(e) Turn off the discharge start signal (HV OFF), then set 2790
as the bias command value in PRM 15223 (the current value
minus 60).
(f) Check that trigger electrode discharge lasts for five minutes
in the base discharge state. If discharge is turned off, turn
VR11 of the power supply clockwise slowly, and increase
the value of RFI by 4 mA. Turn off the discharge start
signal (HV OFF) then back on, then repeat this operation
until discharge is maintained for five minutes.