13 — Display (CX30/CX34)
13–5
CX20/CX30/CX34 Service Manual
13.2
Testing
The displays are check–scanned during power–up. Initially, all segments and
the LED are energized. All characters will then display progressively the number
sequence 9, 8, 7, 6, 5, 4, 3, 2, 1 and 0. This should be observed to ensure that
all display segments and display drivers are working correctly. This function can
also be accessed from the Test key on the keyboard (see appropriate Operators’
Handbook). The Avoir display has a 9/8 fraction character in which one
segment is not energised.
13.3
Configuration Data
Caution
Do not adjust the display PCB switch settings with the
machine powered up as this will damage the display
drivers.
See Tables 13.1 to 13.4 for switch settings and LED allocation for both metric
and avoir display PCBs.
Figure 13.4
Display PCB – Switches and LEDs
1
2
AB
D1
D5
D3
D4
D2
SW2
D6
D7
1
2
A
B
1
2
AB
Brown
Red
CON1 (other
side of PCB)
SW1
SW3
D1A
Summary of Contents for CX20 SERIES
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Page 317: ...Addendum A Phase 1 4 and CX34 Parts List A 30 CX20 CX30 CX34 Addendum A ...
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Page 343: ...Addendum B Phase 1 5 1 5 3 and New Main PCB B 22 Addendum B ...
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Page 351: ...PL Parts List Devlin Keyboard C 6 Addendum C ...
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