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SERVICING THE AT30
61
Replacing the power (ballast) resistor (R3)
- 48 and 130 Vdc units only
For 48 Vdc and 130 Vdc AT30 battery chargers, R3 is mounted with
metal brackets onto the back panel of the enclosure. Cut wires #
49
and #
51
connected to R3 as close to the resistor leads as possible. Strip off
0.25in / 6.4mm of insulation from the cut ends of the wires. Unscrew the
top mounting-bracket and remove the existing resistor. Mount the new R3
and replace the top mounting-bracket. Polarity is not important. Carefully
re-solder the cut wires to R3, remount the resistor and top bracket.
Replacing resistors (R3, R4, R6 & R14) on the gate driver board (A15)
For 12 Vdc and 24 Vdc AT30 battery chargers, R3 is soldered directly
onto A15. In all AT30 battery chargers, R4, R6 and R14 are soldered
directly onto A15. See detail of the gate driver pc board below for proper
location.
If any of these resistors need to be replaced we suggest you order a new
A15 board. See
Replacing the control pc board (A1) and/or gate driver pc
board (A15)
on page 59.
If any of these resistors
must
be replaced without replacing A15, please
select the proper part number listed in the table starting on page 62 and
order it from the factory or your sales representative.
Remove A15 as described on page 59. Using wire cutters, clip the
soldered leads of the old resistor and remove it from A15. Carefully solder
on the new resistor, making sure not to damage any other components on
A15. Polarity is not important for these resistors. Once the solder cools,
replace A15 as described on page 59.
Summary of Contents for AT30 SERIES
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