Agilent Technologies 6032A, 6035A Primary Interface Troubleshooting, Error, Go to Secondary SA

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.

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

Table 3-1. Selftest Error Code Troubleshooting

Error Code	Description	Check Functional Circuit
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	│	Go to Secondary SA
ERROR 17	Current DAC Full Scale Low	Check U9,65,68	├─	Troubleshooting
			│
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

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.

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

Figure 3-2. GPIB Board Test Setup

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