AR 10046494, Руководство по эксплуатации и обслуживанию, Страница: 47 / 60

Model 60/40S1G18B
Rev A 27
4.3.1 Power On Indication Doesn’t Display on Front Panel Vacuum
Fluorescent Display (VFD) when POWER Switch is Depressed
(Schematic 10046186)
1. If the Model 60/40S1G18B is operating in an otherwise normal fashion, the front panel VFD or the
wiring to it could be defective.
2. Check the LOCAL/REMOTE switch on the unit’s front panel; it must be set to either the HI BAND or
LO BAND position in order to operate the front panel POWER switch. Check the AC switch on the
unit’s rear panel; it must be set to the “1” (ON) position. Check the AC fuses in the power entry module.
3. If the POWER ON indication is not displayed and the cooling fans are not running, check to see that the
unit is plugged into a live outlet and that the AC line cord is plugged securely into the unit.
4. Check the +5V standby output voltage from PS1; this voltage should be as follows:
PS1, P13, Pin 12 + 5.0 ± 0.2VDC
5. If output voltage is not present on PS1, check the AC input to PS1.
6. Check the voltage to the A14A1/A14A3 Switch Breakout Assy on connector P12; the voltages should be
as follows:
A14A1 J1 / P22, Pin 2
+ 5.0 ± 0.2VDC
A14A3 J5 / P12, Pin 5 + 5.0
±
0.2VDC
7. Check the voltage on A14A1 P1 J3, Pin 8; it should be
≥
3.3V when the POWER switch (S1) is in the
normal position and < 0.1V when S1 is depressed. S1 is normally open; it is closed only when it is
depressed. The amplifier should change state every time the POWER switch is depressed.
8. If all voltages are correct and the unit still does not operate, contact AR to arrange for repair or
replacement of the A14 Control Panel.
4.3.2 The Unit Cannot Be Operated Remotely
1. Verify that the front panel LOCAL/REMOTE switch is set to REMOTE.
2. Verify that the unit operates locally by resetting the switch to the LOCAL position; if the unit does not
operate, see 4.3.1.