DC Volts Troubleshooting, AC Volts Troubleshooting

Diagnostic Testing and Troubleshooting (2620A/2625A)	5
Analog Troubleshooting

	A3TP13 TO A3TP9
	0
1V/DIV	5 mS/DIV

s37f.eps

Figure 5-6. Integrator Output

5-11. DC Volts Troubleshooting

Setup the instrument to measure a specific channel on the 300 mV or 3V range, and apply an input to that channel. Then trace the HI signal (referenced to the input channel LO terminal) as described in Table 5-4.

If the input HI path traces out properly, remove the input from the channel and trace continuity through the LO path. Check among A3L4-A3L24, A3K1-A3K14, A3R35, A3R43, and A3U8 pin 11.

Table 5-4. DC Volts HI Troubleshooting

Checkpoint

A3R11 HI

A3U8 pin 23

A3U8 pin 58

Signal Description

Input

Input, DC filter output

Possible Fault

A3K1 through A3K14, A3U4, A3U5, A3U11, A3U12, A3L1, A3L2, A3L3

A3R11, A3K17, A3R42, A3C32

A3U8, A3Q2

5-12. AC Volts Troubleshooting

Setup the instrument to measure a channel on the 300 mV ac range, and apply a signal to that channel. Then trace this HI signal (referenced to the input channel LO terminal) as described in Table 5-5.

If the input HI path traces out properly, remove the input from the channel, and trace continuity through the LO path. Check among A3L4 through A3L24, A3K1 through A3K14, A3R43, A3R34, A3K16, and A3U8 pin 13.

5-17

2635A, 2625A specifications

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Fluke 2625A, 2635A DC Volts Troubleshooting, AC Volts Troubleshooting, Signal Description

Models: 2635A 2625A