PLCC/SOJ ADAPTER

The PLCC/SOJ ADAPTER enables SIMCHECK to test surface mounted DRAM chips which are plugged in either the PLCC or SOJ standard. This adapter tests 64Kx1, 256Kx1, 1Mx1, 4Mx1, 64Kx4, 256Kx4, and 1Mx4. This adapter uses three high quality sockets which support the PLCC, SOJ 300 mils width and the SOJ 350 mils width standards.

OPERATION

Connect the adapter to your SIMCHECK SIP ZIF (green) socket when SIMCHECK is either ON or OFF.

The adapter has two switches for selecting the X1 or X4 configuration. If you test a SOJ X1 or a PLCC X1 DRAM chip, set both switches at the left position. If you test a SOJ X4 or a PLCC X4 DRAM chip, set the two switches at the right position. Setting the switches incorrectly will not harm the tested chip BUT WILL CAUSE AN ERROR MESSAGE.

HANDLING THE PLCC CHIPS: Use the PLCC SOCKET (marked PLCC) for testing the PLCC chips. Pin 1 of the PLCC chip is marked with a dot. Place the chip in the socket so that pin 1 points away from you. Press the chip down as far as it will go and release. This will lock the PLCC chip in the socket. To remove the chip, press the chip down and release. This time it will unlock the socket.

HANDLING THE SOJ CHIPS: Most SOJ DRAM chips are made in accordance with the standard 300 mils package and they should be tested in the middle socket which is marked "SOJ 300". Pin 1 of the SOJ chip is marked with a dot. Place the chip in the socket so that pin 1 points away from you. Also, make sure that the markings on the top of the chip face up (this is called "LIVE BUG" insertion). Insert the chip carefully as far as it will go and press the sides of the socket to lock the chip in the test position. To remove the chip, press the sides of the socket to unlock the chip. You may find a common chip/IC extractor tool helpful in handling the tiny chips. Some 4Meg SOJ chips are made in accordance with the 350 mils package. These chips are tested in the left socket which is marked "SOJ 350". Insert the chip all the way down into the socket so that pin 1 points away from you and the markings on the top of the chip face up.

Once the PLCC or SOJ chip is inserted, press F1 to start the test. The test procedure is exactly the same as that of our SINGLE CHIP ADAPTERS.

NOTES:

1. YOU CAN TEST ONLY ONE CHIP AT A TIME!
2. If you are not sure about the size of the chip, you may experiment safely with the adapter's switches until SIMCHECK is able to identify the chip's size.
3. The adapter has two LEDs which light during the test (namely after you have pressed F1 to initiate the test). Their location on the board corresponds to the setting of the switches. The left LED lights when you test X1 chips, the right LED lights when you test X4 chips.

Required EPROM Version: 1.25 or above.

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