The NT/NTX ROM and SIMM Test is a diagnostic tool that identifies defective ROM modules on the LaserWriter II NT I/O board, and defective ROM and SIMM modules on the LaserWriter II NTX I/O board.
SETTING UP:
1. Connect the Macintosh test station to a wall socket with an AC power cord.
2. Place the LaserWriter II next to the Macintosh test station.
3. Connect the LaserWriter II to a wall socket with an AC power cord.
4. Connect one end of the APM/ImageWriter II to Apple IIGS/Macintosh Plus cable
(serial port cable) to the LocalTalk port of the LaserWriter II.
5. Connect the other end of the serial port cable to the modem port of the Macintosh
test station.
6. With the power still off, install the yellow LaserWriter II Test Connector on the
25-pin serial port of the LaserWriter II. The Macintosh will not be able to
communicate with the LaserWriter II test manager unless the LaserWriter II
Test Connector is installed.
NOTE: The test connector will cause changes in the normal operation of the status
LEDs. These changes do not indicate problems and will disappear when the
the test connector is removed and the printer is turned off and then on
again.
7. Connect a mouse (and keyboard, if desired) to the Macintosh test station.
8. If the LaserWriter II has an NTX I/O board, examine the board to note the number
of SIMM banks in use before you switch on the printer.
ESTABLISHING COMMUNICATION:
1. Switch on the LaserWriter II.
2. Insert the NT/NTX ROM and SIMM Test disk in the Macintosh test station, and
switch on the Macintosh.
3. Open the disk icon, and then the NT/NTX ROM and SIMM Test icon. The NT/NTX ROM
and SIMM Test Start window will appear on the Macintosh screen.
4. To begin the test, click the Start button in the NT/NTX ROM and SIMM Test Start
window.
5. You will be asked which type of I/O board you are testing and (if it is an NTX) how
many SIMM banks are in use. Be sure to answer correctly, or test results may be
misleading.
RUNNING THE TEST:
1. The NT/NTX ROM and SIMM Test will interact with you throughout the testing.
When the test detects a failed ROM or SIMM module, the test will stop, and a
window will indicate which module must be replaced.
2. If you have just replaced a ROM or SIMM module, and the test again identifies
the same module as defective, the problem probably has a different cause.
Reinstall the original module and replace the I/O board.
IMPORTANT: Do not forget to remove the LaserWriter II Test Connector from the back
of the NT or NTX I/O board when you have completed testing. If the test connector
is not removed, the I/O board will be unable to resume normal operation.
ROM IDENTIFICATION:
The NT and NTX I/O boards have eight ROMs installed. When replacing a failed ROM on
the I/O board, verify that the new ROM has the same part number as the failed ROM.
Only install ROMs with matching part numbers in the same ROM sockets.
To locate the ROM part number, look at the markings on the ROM chip. The part number is an 8-character number beginning with either 341 or 342. The part number will be in one of the following two formats:
34x-yyyyz or 34x-yyyy-z
The part of the number you want to match is the yyyy.