IBM VERSION 5 SY44-5902-05 - Manual (Page 179)

For powered-off systems without a keystick, function 02 is used to select the IPL
type and IPL speed indicators. Table 22 shows an example of the sequence for
powered-off systems without a keystick.
Table 22. Function 02 Select IPL Type and IPL Speed on Systems without an Electronic
Keystick
Function/data Action or description
02 _ _ _ _ _ _ Use the Increment or Decrement buttons to scroll to Function 02.
02 _ _ _ A _ N Press Enter once to start function 02. Use the Increment or
Decrement buttons to scroll through valid IPL type and logical key
mode combinations (
A_N, B_N, C_N, D_N, A_M, B_M, C_M, D_M).
Press Enter to save the selected IPL type and key mode
combination and exit Function 02.
Use the Increment or Decrement buttons to scroll to Function 02.
02 _ _ _ _ V _ Press Enter twice in a row to select the IPL speeds. Use the
Increment or Decrement buttons to scroll through the IPL speeds.
Press Enter to select the IPL speed and exit function 02.
Function 03–Start IPL: Function 03 is enabled only when you select Manual mode
and the system power is on.
This function starts an IPL of the selected IPL mode when you press the Enter
button. All the Licensed Internal Code is loaded.
Attention: No system shutdown is performed before the IPL. The use of this
function can cause loss of data.
Function 04–Lamp Test: This function shows whether any control panel indicators
are burned out and whether characters that are displayed on the control panel
Function/Data display are valid. When you activate this test, the following lights go
on:
v On the system control panel:
– The Processor Active/Activity light
– The Processor Activity Select lights
– The System Attention light
– The Power On light
– A 5 x 7 dot pattern for each character in the Function/Data display
– The Mode lights (if available)
v On the Expansion Unit control panel (if available):
– The Power On light
– The SPCN Attention light
– A 5 x 7 dot pattern for each character in the Data display
The lamp test continues on the system control panel until you perform another
control panel function or a power procedure. The Expansion Unit control panel
lamp test is only active for 25 seconds.
Use this procedure to verify that the lights on the system control panel are
working correctly. If you cannot complete these steps, go to the “Starting Point for
All Problems” in the Problem Analysis information for your system to start
problem analysis.
Chapter 5. Control Panel Functions 165