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Maintenance
Maintenance
6-6
3. Other problems are typically due to the A1 board.
If a power supply problem is suspected, perform
the procedure in Checking the Power Supply on
page 6-6 to verify that the power supply, and
not the battery, is at fault.
The A1 Board
Most functions of the J17 are located on the
A1 board. Checking the Power Supply on page 6-6
will allow you to determine whether there is a power
supply problem.
The A2 Display Board
The A2 Display board is probably at fault if:
H segments of the display are missing
H the backlight does not operate
To check the display, power on the J17 without a
sensorĆhead attached, and note whether all segĆ
ments of the display are activated.
If the entire display is inactive, or if the backlight does
not operate, proceed to Checking the Power Supply
to rule out a problem with the power supply.
Checking the Power Supply
To check the power supply, you will need:
H
3
/
32
Ăinch hex wrench
H Posidriv screwdriver
H a DC voltmeter
(for voltages in the range 0 to 15 V)
H NineĆvolt, IEC 6LR61Ćtype alkaline battery
Maintenance
Maintenance
6-6
3. Other problems are typically due to the A1 board.
If a power supply problem is suspected, perform
the procedure in Checking the Power Supply on
page 6-6 to verify that the power supply, and
not the battery, is at fault.
The A1 Board
Most functions of the J17 are located on the
A1 board. Checking the Power Supply on page 6-6
will allow you to determine whether there is a power
supply problem.
The A2 Display Board
The A2 Display board is probably at fault if:
H segments of the display are missing
H the backlight does not operate
To check the display, power on the J17 without a
sensorĆhead attached, and note whether all segĆ
ments of the display are activated.
If the entire display is inactive, or if the backlight does
not operate, proceed to Checking the Power Supply
to rule out a problem with the power supply.
Checking the Power Supply
To check the power supply, you will need:
H
3
/
32
Ăinch hex wrench
H Posidriv screwdriver
H a DC voltmeter
(for voltages in the range 0 to 15 V)
H NineĆvolt, IEC 6LR61Ćtype alkaline battery