General Maintenance
Table 4-4: Symptoms and causes (cont.)
Symptom Possible sources or recommended detailed troublesho oting procedure to follow
Failures while running the advanced
diagnostics:
PLD Data Bus
PLD Address Bus
Power Supply
Raster Data Bus Output
Raster Data Bus Input
Raster Data Bus Input
Display Data Bus
Display Address Bus
DSP1 Data Bus
DSP1 Address Bus
DSP2 Data Bus
DSP2 Address Bus
DSP1 QDR1
DSP1 QDR2
DSP2 QDR1
DSP2 QDR2
Display SDRAM Data Bus
Display SDRAM Address Bus
DSP1 SDRAM Data Bus
DSP1 SDRAM Address Bus
DSP2 SDRAM Data Bus
DSP2 SDRAM Address Bus
Perform secondary power supply checks
Replace the main board
4–8 WVR6020, WVR7020, and WVR7120 Waveform Rasterizers Service Manual
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