Kurzweil K2000 Service Manual page 19

SECTION 2
SETUP. PUB 11/04/;
2.4
2.4.1
Changing System Software (Engine)
NOTE: The ICs containing the K2000's software are static sensitive
devices. OSE ALL STANDARD ANTI -STATIC PRECAUTIONS WHEN
HANDLING THESE
DEVICES'
To replace the ICs:
1. turn the unit off and remove the AC line cord from the AC power
connector.
2. Open the unit as described in Section 3.
3. Locate the old software ICs U3 and U6, on the Engine Board
(Figure 2.6 above). Remove the old ICs using an IC puller or
similar tool. Be careful not to damage the traces on the
board.
4. Carefully insert the new IC labeled "LO" in the socket at U3,
and the new IC labeled "HI" in the socket at U6. Make certain
the ICs are oriented with pin 1 toward the front of the unit.
Pin 1 is on the end of the IC with the indentation.
5. Inspect for proper installation - make sure the ICs are firmly
seated into the sockets and that none of the pins are bent.
6. Blose the unit as per the instructions in Section 3.
7. Always BARD RESET the instrument after changing the software.
Note that all user data in RAM will be erased. A hard reset
can be performed on power-up by pressing and holding the "1",
"2" and "3" buttons on the numeric keypad.
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