Other Basic Boards; Bja Power Board; Front Panel Display - Tyco Galaxy SC Controller Manual

Other Basic Boards

BJA Power Board

Front Panel
Display
8 - 2 Troubleshooting
Tyco Electronics Galaxy SC Controller J85501F-1
the controller, and verify proper operation. If the problem remains
put the original BJA power board back in the controller and go to
the next step.
4. Insert all boards which were removed one at a time, while
resetting the controller after each board is installed and looking for
improper operation. Replace the board which causes a failure,
insert the remaining option boards, and verify proper operation.
The basic controller boards (rectifier interface, alarm relay/display, and
power) are diagnosed by the basic controller's microprocessor. If
problems are detected the failed board's amber LED is lit, otherwise the
green LED is lit. If the amber LED is lit, first reset the BJB
microprocessor board and see if the problem clears. If the problem
reoccurs, replace the option board. Note that if the basic controller
microprocessor board fails, both the green and amber LEDs on the other
basic controller boards will be lit.
The test jacks on the front of this board can be used to verify the supply
voltages. The three voltage levels should be:
• +5V: 4.75V-5.25V
• +15V: 14.25V-15.75V
• -15V: 14.25V-15.75V
None of these voltage levels are field adjustable. If any of the voltages
are high, replace the power board. If any of the voltages are below the
lower limits, either the power board is at fault or one of the other basic
controller boards is overloading the supply. Replace the power board, if
the problem persists remove the other basic controller boards one at a
time until the voltage rises back into range. Replace the faulty board
which was overloading the supply and put the original BJA power board
back in the controller.
If the front panel display or LEDs/switches fail, first verify the ribbon
cable from the backplane to the display is not cut, abraded, or otherwise
mangled. Reset the BJB microprocessor board after replacing cable but
before retesting. Replace the BJE alarm relay/display board, and finally
either the display or the BJG LED and switch board, depending on
whether the display or LEDs/switches are failing.
Issue 13 February 2001