11A-series plug-in NVRAM replacement: Difference between revisions

Line 15:

They may just be lost information from the last probe attached.

These failures should be cleared by recycling the power on the mainframe after replacing the NVRAM.

Other than these failures, the plugin will operate normally once the diagnostic error codes are cleared by exiting the diagnostic screen.

If the oscilloscope shows no failures after Enhanced Calibration, operation is fully calibrated except for transient response in the 11A52.

Other than these failures, the plugin will operate normally

To avoid these recurring and annoying problems, the NVRAM must be replaced and the plug in serial number must be written into the NVRAM.

once the diagnostic error codes are cleared by exiting the diagnostic screen.

The NVRAM is identified as a Dallas Semiconductor 1220Y and is the tallest, thickest chip on the board. It has 24 pins.

If the oscilloscope shows no failures after Enhanced Calibration,

This NVRAM can be replaced with Dallas 1220AD-200, which is currently still in production and will have a battery that should last 25 years.

operation is fully calibrated except for transient response in the 11A52.

To avoid these recurring and annoying problems,

the NVRAM must be replaced and the plug in serial number must be written into the NVRAM.

The NVRAM is identified as a Dallas Semiconductor 1220Y and is the tallest, thickest chip on the board.

It has 24 pins.

This NVRAM can be replaced with Dallas 1220AD-200,

which is currently still in production and will have a battery that should last 25 years.

Unsolder and remove the Dallas NVRAM.

I recommend that the replacement NVRAM be socketed with a Mill-Max 110-41-624-41-001000 socket, available from Mouser Electronics and other suppliers

I recommend that the replacement NVRAM be socketed with a Mill-Max 110-41-624-41-001000 socket,

The procedure to replace the NVRAM and install a serial number is the same for the 11A16, 11A32, 11A33, 11A34, 11A71, and 11A72 plugins,

available from Mouser Electronics and other suppliers.

The procedure to replace the NVRAM and install a serial number is the same for the

11A16, 11A32, 11A33, 11A34, 11A71, and 11A72 plugins,

except for 12 additional constants required by the 11A52.

Note: The 12 calibration constants for 11A52 high frequency transient response cannot be set using an 11300 series mainframe.

'''Note''': The 12 calibration constants for 11A52 high frequency transient response cannot be set using an 11300 series mainframe.

This is apparently due to a failure of the plugin design group and the 11300 series design group to communicate

in spite of the fact that the two groups were contiguous and had the same manager.

@@ Line 15: / Line 15: @@
 They may just be lost information from the last probe attached.
 These failures should be cleared by recycling the power on the mainframe after replacing the NVRAM.
-Other than these failures, the plugin will operate normally once the diagnostic error codes are cleared by exiting the diagnostic screen.
-If the oscilloscope shows no failures after Enhanced Calibration, operation is fully calibrated except for transient response in the 11A52.
+Other than these failures, the plugin will operate normally
-To avoid these recurring and annoying problems, the NVRAM must be replaced and the plug in serial number must be written into the NVRAM.
+once the diagnostic error codes are cleared by exiting the diagnostic screen.
-The NVRAM is identified as a Dallas Semiconductor 1220Y and is the tallest, thickest chip on the board. It has 24 pins.
+If the oscilloscope shows no failures after Enhanced Calibration,
-This NVRAM can be replaced with Dallas 1220AD-200, which is currently still in production and will have a battery that should last 25 years.
+operation is fully calibrated except for transient response in the 11A52.
+To avoid these recurring and annoying problems,
+the NVRAM must be replaced and the plug in serial number must be written into the NVRAM.
+The NVRAM is identified as a Dallas Semiconductor 1220Y and is the tallest, thickest chip on the board.
+It has 24 pins.
+This NVRAM can be replaced with Dallas 1220AD-200,
+which is currently still in production and will have a battery that should last 25 years.
 Unsolder and remove the Dallas NVRAM.
-I recommend that the replacement NVRAM be socketed with a Mill-Max 110-41-624-41-001000 socket, available from Mouser Electronics and other suppliers
+I recommend that the replacement NVRAM be socketed with a Mill-Max 110-41-624-41-001000 socket,
-The procedure to replace the NVRAM and install a serial number is the same for the 11A16, 11A32, 11A33, 11A34, 11A71, and 11A72 plugins,
+available from Mouser Electronics and other suppliers.
+The procedure to replace the NVRAM and install a serial number is the same for the
+A16, 11A32, 11A33, 11A34, 11A71, and 11A72 plugins,
 except for 12 additional constants required by the 11A52.
-Note: The 12 calibration constants for 11A52 high frequency transient response cannot be set using an 11300 series mainframe.
+'''Note''': The 12 calibration constants for 11A52 high frequency transient response cannot be set using an 11300 series mainframe.
 This is apparently due to a failure of the plugin design group and the 11300 series design group to communicate
 in spite of the fact that the two groups were contiguous and had the same manager.

11A-series plug-in NVRAM replacement: Difference between revisions

Navigation menu