5: Maintenance
PRC-PS-MS
5-3
DC Output Check 1. Connect the DC voltmeter across the capacitor.
2. Connect the 82 ohm resistor across the capacitor.
3. Measure the DC voltage. It should be 13.3 Vdc ±0.2 Vdc.
Reset Circuit
Check
1. Press and hold the RESET button and observe the capacitor discharging.
2. Release the RESET button when the capacitor voltage is between 6 Vdc
and 10 Vdc. The CHARGING LED should light up.
Overcharge
Voltage Check
1. Measure the DC voltage across the 82 ohm resistor. It should be
14.0 Vdc ±0.2 Vdc.
Undervoltage
Protection Circuit
Check
1. Connect the 2.2 ohm resistor across the capacitor.
2. Observe that the FAULT LED lights up after a few seconds.
Figure 5-2. DC Current Check Setup
A
B
C
REAR
PANEL
(
BATTERY
REMOVED
)
(+)
(–)
A
B
C
A
=
GROUND
B
=
V
12
DC
POS
NEG
2.2
OHM
6.8
OHM
