L32-64-R32 Switch; Service Check; Display Registers Switch; Basic - Apl Switch (Model Conly) - IBM 5100 Maintenance Information Manual

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242
L32-64-R32 SWITCH
Service Check
1.
2.
3.
4.
Set the DISPLAY REGISTERS switch to the
DISPLAY REGISTERS position.
Set the L32-64-R32 switch to the 64 position.
Each display line should show 64 characters.
Set the switch to the L32 position. Each display
line should show the left 32 characters with blanks
between each character.
Set the switch to the R32 position. Each display
line should show the right 32 characters with
blanks between each character.
243
DISPLAY REGISTERS SWITCH
Service Check
1.
2.
3.
Switch the DISPLAY REGISTERS switch to the
NORMAL position.
Press RESTART, LOAD 0 or CLEAR WS should
appear on the display.
Switch to the DISPLAY REGISTERS position. The
display shows the first 512 bytes of read/write
storage. A" 16 lines should be filled with hex
characters with some characters changing rapidly.
244
BASIC - APL SWITCH (MODEL CONLY)
Service Check
1. The position of this switch is sensed only during a
power up or restart operation.
2.
3.
Set the BASIC-APL switch to BASIC, press
RESTART. LOAD 0 should appear on the display
within 10 seconds.
Set the BASIC-APL switch to APL, press
RESTART. CLEAR WS should appear on the
display within 10 seconds.
",,45
REVERSE DISPLAY SWITCH
Service Check
1. With the BRIGHTNESS control set to the center of
its range, press the bottom of the REVERSE
DISPLAY switch. The characters displayed should
be black on a white background.
2. Press the top of the REVERSE DISPLAY switch.
The characters displayed should be white on a
black background.
246
RESTART SWITCH AND LAMP TEST
Service Check
1. The RESTART switch resets a" circuits and
initiates the bring up program. When pressed, it
supplies voltage to test the lamps.
2.
Press and hold the RESTART switch. The
PROCESS CHECK and the IN PROCESS lights
should be on.
3. Release the RESTART switch. Both lights should
go off. After 10 seconds, LOAD 0 or CLEAR WS
should appear on the display.
247
BRIGHTNESS CONTROL
Service Check
When you press the bottom of the REVERSE DISPLAY
switch, the BRIGHTNESS control adjusts the brightness
of the white background. When you press the top of
the REVERSE DISPLAY switch, the BRIGHTNESS
control adjusts the brightness of the white characters on
a dark background.
Display 2-43