Normal Power-On Display Sequence
The operator panel consists of a keypad, an LCD, and four
LEDs (Ready, Call 5494 Service, See PD Guide, and Test Mode) that indicate
operating status. An 8051 controls the LCD, LEDs, and the keypad.
Communications between planar and operator panel are through a serial port.
P2 LCD Panel
P3 Header to planar
P4 Tape connector to keypad
U4 intel 02F9476
Y1 8.000 MHz xtal
The LCD has 16 character positions. It is blank and displays
a cursor in the rightmost position when not in use. When the 5494 operator
panel is in use, there will always be a message code (002-01 in the above
example) displayed on the left-hand side of the LCD. The message codes
are described in "Message Codes" in topic 3.1. When the 5494 is in use,
the LCD can also contain, in the data field on the right-hand side of the
LCD, a system reference code (SRC) or information as defined by the message
code. In the example, the data field contains an SRC.
If an error occurs before or during normal operation, both
a message code and an SRC will be displayed on the LCD and an LED will
be lit. If more than one error occurs during normal operation, the message
codes and SRCs will cycle at 3-second intervals. If the error clears (a
link is established after a failure, for example), the message code and
SRC will be removed from the LCD by the 5494.
The keys on the keypad allow commands to be entered and sent to the
5494, and include:
REQ Initiates a request function
PF1 Used for special requests
PF2 Used for special requests
Esc Used to cancel a request
Alt Enables the alternate hexadecimal
values of keys 4 through 9, to be used with keys PF1, PF2, and Esc for
additional special functions. (Ed.
Might be the SHFT key)
Enter Signals to the 5494 the end
of an input string
Clear Clears a value being
entered and allows you to begin again
0 to 9 Numerics 0 to 9
Alt+4 Hexadecimal A
Alt+5 Hexadecimal B
Alt+6 Hexadecimal C
Alt+7 Hexadecimal D
Alt+8 Hexadecimal E
Alt+9 Hexadecimal F
Up arrow Scroll up through several
choices or panels of data
Down arrow Scroll down through
several choices or panels of data
Left arrow Move the cursor left
or scroll to additional fields of data
Right arrow Move the cursor right
or scroll to additional fields of data.
If you hose the refstamp, the 5494 will not boot up and
the error code '003-04 1' is displayed on the Op Panel.
Normal Power-On Display Sequence
Soon after the 5494 power pushbutton is set to ON (|):
- All LEDs are ON for 1 second.
- All LEDs are OFF for 1 second.
- The Test Mode LED is switched ON.
- 001-01 is displayed, indicating that POST is running.
- The date and time are displayed on the LCD.
- The microcode is loaded.
- The Test Mode LED is switched OFF.
- Within 10 seconds, the Ready LED is switched ON
Model 001 or Model 002 to Model EXT. Model 001 and Model 002 can be
made functionally equivalent to Model EXT by installing level 3.0 microcode
Cables For 5494
72X5645 - Cable Asm, Twinaxial Workstation Adapter (Ports 0-3)
03F0386 - Cable Asm, Twinaxial Workstation Adapter (Ports 4-7)
Note: The Twinaxial Workstation Attachment cable
connected to the lowest number slot supports twinaxial ports 0-3. The Twinaxial
Expansion Adapter, if installed, supports twinaxial ports 4-7.
Power Supply P/N 03F0420 / KRON (?) 55JET064
Global Manufacturers' Services Valencia, Spain
Uses a Model 90 form factor PSU, but wimpier. No HD power plugs.
Input: 100 - 240 V, 1.6 - 0.78 A, 50 / 60 Hz
Output: 63.8 W
+5 V 10 A
+12 V 0.80 A
-12 V 0.35 A
Uses an NMB Boxer fan, 3610NL-04W-B10 12 V, 0.13 A, ball bearings, brushless.
Floppy Drive 52G3400, P/N 10H4267
Note: 64F0204 / 64F3197 BUT
it has the Mitsubishi MF356F-822MB "*" floppy.
In IBM's eyes, there's no need for more than a one device
cable... Bay B has the LCD display, Bay D has the "glove
box" Bay C is inaccessible.
Why waste good money on even a twist? There can only be
one... floppy [Highlander]. Why use a three-device cable
like the Model 90 if you will only be able to use one
Note that the 5494 does have the Adapter Card-Guide
Assembly 33F8363. It does not have the 92mm Base Fan.