5: Maintenance
5-6
PRC-PS-MS
5.2
Troubleshooting
5.2.1
Index to Test
Procedure
The following table refers the technician to a specific place in the
troubleshooting procedure if the PRC-PS fails the indicated step in the test
procedure.
5.2.2
Troubleshooting
Procedures
The following troubleshooting procedures provide specific steps to isolate
faults. Since the two charging circuits are identical, procedures that deal with
them refer to components in the INTERNAL charging station.
Note:
The term IC refers to the UC3906N charger IC, and the term op amp
refers to the LM358N operational amplifier.
Current Source
This section assumes a failure in the
DC Input Circuitry Check section on
if the READY LED does not light up.
Table 5-1. Troubleshooting Index
Failed Test Section
Troubleshooting Section
Charging Circuit Check
section on page 5-1
Refer to the Current Source section on page
5-6.
DC Current Check section
on page 5-2
Refer to the Bulk Charging Current
Regulation section on page 5-7.
DC Current Check section
on page 5-2
Refer to the Current Source section on page
5-6.
DC Output Check section
on page 5-3
Refer to the Float Charge Voltage section on
page 5-8.
Reset Circuit Check
section on page 5-3
Refer to the Reset Function section on page
5-8.
Overcharge Voltage Check
section on page 5-3
Refer to the Overcharge Voltage section on
page 5-8.
Undervoltage Protection
Circuit Check section on
page 5-3
Refer to the Undervoltage Protection section
on page 5-8.
Power Supply DC Voltage
and Current section on
page 5-4
Refer to the Power Supply Output Voltage
section on page 5-10.
Reverse Current Protection
section on page 5-4
Refer to the Reverse Current Protection
section on page 5-8.
DC Input Circuitry Check
section on page 5-5
Refer to the Reverse Current Protection
section on page 5-8.
