Primary Interface Troubleshooting - HP 6033A series Service Manual

Error Code Description
ERROR 4 External RAM Test
ERROR 5 Internal RAM Test
ERROR 6 External ROM Test
ERROR 7 HP-IB Test
ERROR 8 HP-IB address set to 31
ERROR 10 Internal ROM Test
ERROR 12 ADC Zero Too High
ERROR 13 Voltage DAC Full Scale Low
ERROR 14 Voltage DAC Full Scale High
ERROR 15 Voltage DAC Zero Low
ERROR 16 Voltage DAC Zero High
ERROR 17 Current DAC Full Scale Low
ERROR 18 Current DAC Full Scale High
ERROR 19 Current DAC Zero Low
ERROR 20 Current DAC Zero High

Primary Interface Troubleshooting

Primary interface troubleshooting checks for the presence of bias voltages, clock signals (see Figure 3-3), and activity on the
data lines. Primary signature analysis may be used to further troubleshoot these circuits, but since the address and data lines
go to so many IC's, it may not be cost-effective to narrow an incorrect signature to a specific chip. HP-IB board replacement
may be the most cost-effective solution.
Note:
The initialization procedure in Page 28 must be performed when the HP-IB board is replaced.
36
Table 3-1. Selftest Error Code Troubleshooting
Check Functional Circuit
Replace A8U8
Replace A8U14
Replace A8U6
Replace A8U17
Replace A8U4
Check U11,20,24,66,67; go to Readback DAC Troubleshooting
Check U2,7,64,69
Check U2,7,64,69
Check U2,7,64,69
Check U2,7,64,69
Check U9,65,68
Check U9,65,68
Check U9,65,68
Check U9,65,68
Figure 3-2. HP-IB Board Test Setup
Go to Secondary SA
Troubleshooting