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continuity on defective signal lines from components that are tied to the same signal
line.
9. If the fault is located to either A/D board or the Controller card, replacement boards
can be sent without affecting the calibration on the unit. An I/O board replacement
will require a calibration of the unit.
A/D
When MTA for Windows is installed or an Epson 640 or compatible printer is used, it
will be necessary to replace U3 on the Controller Board. For this program to function,
install the replacement 08-011R, firmware revision 1.37 for a 12kV tester. Please see the
MTA for Windows users manual for further explanation of the procedure.
1. These assemblies can be accessed from the front panel from the Knurr, Rittal or
Schroff design cases. These assemblies are installed in the card cage portion of the
unit located to the right of the CRT display.
2. To access the I/O board, Baker part 80-108, locate on the front panel which has the
function knob, Volts/Division knob and the Seconds/Division knob.
3. Remove two (2) M3 x 7mm hex head screws located above the function knob and
below the Seconds/Division knob.
4. Grasp the Function knob and the Volts/Division knob and pull away from the front
panel. This assembly is a 96-pin plug in type card that slides on a card guide system
and plugs into mating 96 pin connectors mounted on the Motherboard.
5. To remove the A/D board, Baker part 80-106, locate the panel with the Open
Ground/Hipot trip indicator lamps Intensity, Vertical and Horizontal Position knobs.
6. Remove two (2) M3 x 7mm hex head screws located above the Open round indicator
and below the Horizontal position knob.
7. Position fingertips behind the stenciled panel for this assembly and pull away from
the front panel.
8. Access to the Controller board, Baker part 80-107, is now gained. This will be the
only board left in the card cage. Simply grasp this assembly and pull away from the
front panel.
9. Remove the Controller board and replace U3 with one labeled firmware revision 1.37.
, I/O
BOARD
B
A
OARD
Baker Instrument Company
The Measure of Quality
, C
BOARD
ONTROLLER
I
CCESS
NSTRUCTIONS
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