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Removal and Installation Procedures
6- 22
TLA7Nx, TLA7Px, & TLA7Qx Logic Analyzer Module Service Manual
Fuses
Table 6--4 lists the fuses on the LPU board and briefly describes their functions.
Table 6- 4: Local Processor Unit board fuses
Fuse
Voltage
Purpose
F891
+5 V
Supplies the 5 V-to-3.5 V DC to DC converter. The converter powers the
3 V PALS and the 3 V ASICs on the acquisition board. The converter
also enables the
±
24 V-to-5V DC to DC converter.
F790
+5 V
Supplies the microprocessor and the supporting circuitry.
F690
+12 V
Supplies the control IC and MOSFET drivers for the 5 V-to-3.5 V DC to
DC converter.
F981
--24 V
Supplies the
±
24 V-to-3.3 V DC to DC converter. This +5 V output
powers the acquisition RAM on the acquisition board.
F980
+24 V
Supplies the
±
24 V-to-3.3 V DC to DC converter. This +5 V output
powers the acquisition RAM on the acquisition board.
F890
--5 V
This supply is not used.
F470
+5 V
Supplies power to External Manufacturing FLASH card.
Table 6--5 lists the fuse locations on the acquisition board and briefly describes
the fuse functions. Two columns of the following table list the acquisition board
fuse circuit locations. The first column indicates where the manufacturing--
installed inline fuse is located. The second column indicates the location where
you can install a replacement thru-hole fuse. The parts list, located on page
10--11, contains ordering information for both types of fuses.
Table 6- 5: Acquisition board fuses
Installed In-
line Fuse
Circuit
Replace-
ment Thru-
hole Fuse
Circuit
Voltage
Purpose
F0952
F942
+5 V
Protect the probe receivers, DAC circuitry and local
processor unit board interface.
F0950
F940
--5 V
Protect the clock circuitry.
F0941
F951
+12 V
Protect the clock circuitry and the digital to analog
converter circuitry.
F0943
F953
--12 V
Protect the clock circuitry and the digital to analog
converter circuitry.
Local Processor Unit
Board Fuses
Acquisition Board Fuses
Содержание LTA7P Series
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Страница 14: ...Service Safety Summary x TLA7Nx TLA7Px TLA7Qx Logic Analyzer Module Service Manual...
Страница 22: ...Introduction xviii TLA7Nx TLA7Px TLA7Qx Logic Analyzer Module Service Manual...
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Страница 96: ...Logic Analyzer Module Adjustment Procedures 5 10 TLA7Nx TLA7Px TLA7Qx Logic Analyzer Module Service Manual...
Страница 148: ...Troubleshooting 6 40 TLA7Nx TLA7Px TLA7Qx Logic Analyzer Module Service Manual...
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