Diagnostic Testing and Troubleshooting (2620A/2625A)
Analog Troubleshooting
5
5-17
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
Signal Description
Possible Fault
A3R11 HI
Input
A3K1 through A3K14, A3U4, A3U5, A3U11, A3U12,
A3L1, A3L2, A3L3
A3U8 pin 23
Input
A3R11, A3K17, A3R42, A3C32
A3U8 pin 58
Input, DC filter output
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.
Summary of Contents for 2620A
Page 4: ......
Page 18: ...HYDRA Service Manual 1 2...
Page 48: ...HYDRA Service Manual 1 32...
Page 140: ...HYDRA Service Manual 3 16...
Page 234: ...HYDRA Service Manual 5A 34...
Page 236: ...HYDRA Service Manual 6 2...
Page 254: ...HYDRA Service Manual 6 20 2620A 1601 s63f eps Figure 6 3 2620A 2625A A1 Main PCA...
Page 258: ...HYDRA Service Manual 6 24 2635A 1601 s64f eps Figure 6 4 2635A A1 Main PCA...
Page 260: ...HYDRA Service Manual 6 26 2620A 4002 CKT 1 CKT 2 s65f eps Figure 6 5 A2 Display PCA...
Page 272: ...HYDRA Service Manual 6 38...
Page 274: ...HYDRA Service Manual 7 2...
Page 282: ...HYDRA Service Manual 7 10...
Page 284: ...HYDRA Service Manual 8 2...
Page 285: ...Schematic Diagrams 8 8 3 Figure 8 1 A1 Main PCA 2620A 2625A 2620A 1601 s88f eps...
Page 288: ...Schematic Diagrams 8 8 6 Figure 8 1 A1 Main PCA 2620A 2625A cont 2620A 1001 3 of 4 s73f eps...
Page 292: ...Schematic Diagrams 8 8 10 2635A 1001 2 of 5 Figure 8 2 A1 Main PCA 2635A cont s76f eps...
Page 293: ...Schematic Diagrams 8 8 11 2635A 1001 3 of 5 Figure 8 2 A1 Main PCA 2635A cont s77f eps...
Page 296: ...Schematic Diagrams 8 8 14 2620A 4002 CKT 1 CKT 2 Figure 8 3 A2 Display PCA s90f eps...
Page 300: ...Schematic Diagrams 8 8 18 2620A 1003 2 of 3 Figure 8 4 A3 A D Converter PCA cont s82c eps...
Page 301: ...Schematic Diagrams 8 8 19 2620A 1003 3 of 3 Figure 8 4 A3 A D Converter PCA cont s83c eps...
Page 302: ...Schematic Diagrams 8 8 20 2620A 1604 Figure 8 5 A4 Analog Input PCA s92f eps...
Page 304: ...Schematic Diagrams 8 8 22 2620A 1605 Figure 8 6 A5 IEEE 488 Interface PCA 2620A Only s93f eps...
Page 306: ...Schematic Diagrams 8 8 24 2625A 1606 Figure 8 7 A6 Memory PCA 2625A s94f eps...
Page 310: ...Schematic Diagrams 8 8 28...
