Agilent Technologies 6031A Manuale Utente

To remove the GPIB board, perform the GPIB board removal procedure discussed earlier in this section. Lay out the board
as shown in Figure 3-2 with a piece of insulating material under the board. Reconnect connectors W1, W2, W5, and W6
after the board is on the insulating material.

The GPIB board can be placed alongside the unit for troubleshooting by using extender cables provided in
service kit Agilent P/N 06033-60005.

ERROR 4

External RAM Test

Replace A8U8

ERROR 5

Internal RAM Test

Replace A8U14

ERROR 6

External ROM Test

Replace A8U6

ERROR 7

GPIB Test

Replace A8U17

ERROR 8

GPIB address set to 31

ERROR 10

Internal ROM Test

Replace A8U4

ERROR 12

ADC Zero Too High

Check U11,20,24,66,67; go to Readback DAC Troubleshooting

ERROR 13

Voltage DAC Full Scale Low

Check U2,7,64,69

ERROR 14

Voltage DAC Full Scale High

Check U2,7,64,69

ERROR 15

Voltage DAC Zero Low

Check U2,7,64,69

ERROR 16

Voltage DAC Zero High

Check U2,7,64,69

ERROR 17

Current DAC Full Scale Low

Check U9,65,68

ERROR 18

Current DAC Full Scale High

Check U9,65,68

ERROR 19

Current DAC Zero Low

Check U9,65,68

ERROR 20

Current DAC Zero High

Check U9,65,68

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. GPIB board replacement
may be the most cost-effective solution.

The initialization procedure in Page 31 must be performed when the GPIB board is replaced.