SECTION 5, Page 6 SJKB-40-D, SJKB-40-D/F
JUN. 1999
ELECTRICAL SYSTEM DIAGNOSTICS AND ADJUSTMENTS
EDA BOARD DIAGNOSTICS
1 12 INPUT
2 GROUND
3 NOT USED
4 NOT USED
5 HIGH DRIVE SIGNAL
6 NOT USED
7 NOT USED
8 NOT USED
9 MAGNETIC PICKUP GROUND
10 MAGNETIC PICKUP SIGNAL
11 NOT USED
12 NOT USED
5.9 VOLTS WITH ENGINE AT HIGH RPM’s, BOOM
FULLY RETRACTED AND BELOW HORIZONTAL
Ma40-501
1. Start engine from base.
2. Fully retract boom and lower below horizontal.
3. Using a Volt\Ohm meter, measure voltage at terminal 1 of the EDA board to a good chassis ground. Reading
should be at least 12 volts.
4. Measure voltage between terminals 1 and 2. Reading should be the same as in Step 1.
5. Shut engine off.
6. Locate terminals 9 and 10 on EDA board and remove the attached wires.
7. Using a Volt\Ohm meter set to RX100 scale, measure resistance across the two wires removed in Step 6.
Reading should be between 135 to 165 ohms. If reading is outside this range replace magnetic pickup.
8. Reconnect wires to terminals 9 and 10.
9. Restart the engine from the platform control console. Depress and hold foot switch.
10. Select HIGH RPM’s with engine speed switch at the platform control console.
11. Measure the voltage at the terminal labeled “L” on the EDA board. It should read 5.9 volts. If no voltage
present, replace EDA board. If reading is 1.83 volts precede to step 12. If reading is between 1.90 and 5.9
Volts, perform EDA board adjustment procedure. If reading does not change after performing adjustment
procedure, replace EDA board.
12. Measure voltage between terminal 5 and a good chassis ground. If no voltage present, check and repair the
mid boom out and or high drive\tilt over ride circuit. If at least 12 volts are present, replace EDA board.
Figure 5-1. Multi-Purpose Controller (EDA) Card.
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