Chapter 6 6-15
Digital Control Troubleshooting
Front Panel Troubleshooting (A1, A2)
Inspect Cables
Remove the front panel assembly and visually inspect the ribbon cable that connects the
front panel to the motherboard. Also, inspect the interconnecting ribbon cable between A1
and A2. Make sure the cables are properly connected. Replace any bad cables.
Test Using a Controller
If a controller is available, write a simple command to the analyzer. If the analyzer
successfully executes the command, the problem is either the A2 front panel interface or
W17 (A2 to motherboard ribbon cable) is faulty.
48 ✸✸
49 ✸✸ ✸
50 ✸✸ ✸
51 ✸✸ ✸✸
52 ✸✸ ✸
53 ✸✸ ✸ ✸
54 ✸✸ ✸✸
55 ✸ ✸ ✸✸✸
Table 6-1 Front Panel Key Codes
Decimal
Number
LED Pattern Key
Chan 1 Chan 2 R L T S
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