Pwb Troubleshooting - Honeywell MT13-520 Manual

3.3.2 PWB Troubleshooting

The K2LCN processor boards used in the Multinode Module have indicators on the front
of the board to indicate error conditions. These processor boards have a red LED bar
display with no labels as shown in Figure 3-3.
In the sections to follow, use these indicators in conjunction with indicators on the input-
output and controller boards to find the faulty PWB.
RST/PWR Self-Test Compare
Fail Error
Self-Test
Pass TX
(Green) (Yellow)
Figure 3-3 — K2LCN Indicators
Remove module front panel to view the board LEDs and to check the alphanumeric display
(the Node Address/Error Display).
The
Node Address/Error Display
faults. When directed to this display, consult Appendix A to interpret its meaning.
Multinode Module Service
Data DTAK BGAK
Time Time Parity
Error Out Out
Red LEDs
NOTE
provides an alphanumeric code to aid in finding ORU
3-5
Data EDAC
Bus Multi-Bit
Error Error Error
3.3.2
EDAC LCN
Single-Bit Transaction
Error Error
Node
Address/Error
Display
40022
9/95