MicroGuard
®
434/500 System — Troubleshooting Manual PN W453200 Rev C 08/01/00
GREER COMPANY 1918 E. Glenwood Place Santa Ana, CA 92705 Telephone: (714) 259-9702 FAX: (714) 259-7626
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Crane Systems
3.5.2 SYSTEM CHIP (IC16)
The computer unit contains a replaceable SYSTEM CHIP, illustrated in Figure 3.2.
The system chip, identified as IC16 on the computer board, contains program data, capacity charts
and calibration data for the crane and is a 28-pin dual-in-line (DIL) device. This chip MUST
MATCH the load chart in the crane. Installation of the system chip does NOT necessitate
recalibration of the System, but under certain circumstances may require a “RESET CRANE
DATA” operation (see SECTION 1.4.1) to be performed.
SYSTEM CHIP REMOVAL
1. Turn the power off.
2. Refer to Figure 3.2. Remove the chip from the computer board with a chip removal tool.
SYSTEM CHIP INSTALLATION
1. Use an installation tool to insert the new chip into the socket.
2. Ensure that the notch in the chip points to the upper side of the computer unit (opposite
side to bulkhead connector and pressure ports.
3. Ensure that all pins are properly inserted into the chip socket. These pins are very
easily bent.
WHEN REMOVING AND INSTALLING CHIPS, ENSURE THAT THE POWER IS OFF.
DO NOT TOUCH THE CHIP PINS UNLESS YOU ARE PROPERLY GROUNDED.
STATIC ELECTRICITY CAN DAMAGE CHIPS.
ALWAYS USE A PROPER IC REMOVAL TOOL. USE OF SCREWDRIVERS,
FINGERS, OR OTHER IMPLEMENTS MAY DAMAGE THE CHIP OR SERIOUSLY
DAMAGE THE CIRCUIT BOARD. RECOMMENDED CHIP REMOVAL AND
INSTALLATION TOOLS MAY BE OBTAINED FROM NEWARK ELECTRONICS STOCK
NO. 10F7494 AND 10F7497.
FAILURE TO HAVE ALL PINS INSERTED PROPERLY INTO THE CHIP SOCKET MAY
CAUSE DAMAGE TO THE SYSTEM AND THE CHIP.
SECTION 3
WARNING
!
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