Agilent Technologies 85032B/E 50 Specifiche Pagina 181

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8712ET/ES and 8714ET/ES Troubleshooting and Block Diagrams
RF Network Analyzers Category 4 Failures: Peripheral Device Problems
Service Guide 4-39
Centronics (Parallel) Printers and Plotters
If a Centronics interface problem is indicated during power-up (with no peripheral
connected), there may be a problem with the Centronics interface portion of the Super I/O
(U607). Replace the CPU board (refer to “Removing the CPU Board Assembly” on page
3-6).
Make sure the printer's or plotter's line power is switched on, that it has paper and pens,
that its pinch wheels are down, and so forth. Plotters should not be in VIEW mode. Verify
that the Centronics device has been selected as the hardcopy device by pressing
. The highlighted line on the CRT shows the current
device selection. The second line should say “Centronics.” If this is incorrect, enter the
correct information. Refer to your analyzer's User's Guide for more details on hardcopy
options.
If everything seems okay but you still cannot print or plot, remove the CPU board and
check jumper J645, near the GPIB and parallel connectors at the rear of the board. Make
sure the jumper is in the “RUN” position instead of “TEST.
Try to make a print or plot from another instrument or a computer to confirm that the
printer/plotter is working. If it is, replace the CPU board.
GPIB Systems
If a GPIB interface problem is indicated during power-up (with nothing connected to the
GPIB port), there may be a problem with the GPIB controller chip (U524) or the interface
chips (U525, U526). Replace the CPU board (refer to “Removing the CPU Board Assembly”
on page 3-6.)
Check the analyzer's GPIB functions with a known working peripheral such as a plotter,
printer, or disk drive. Press to
allow the analyzer to control the peripheral. Check the GPIB address on the peripheral,
then set the analyzer to recognize this address by following the instructions in the next
section.
GPIB Problems with Printers or Plotters
For GPIB printers or plotters, press and select the
appropriate GPIB device. The currently selected device is shown on the first line of the
display, and for GPIB devices, the GPIB address is shown on the second line.
To change the address, press and enter the correct value (from 0
to 30.)
NOTE The default GPIB address expected by the analyzer for both printers and
plotters is 5, but the factory default address of most printers is 1.
Make sure the printer or plotter has line power switched on, that it has paper and pens,
that its pinch wheels are down, and so forth. Plotters should not be in VIEW mode. Press
to do a print or plot. If the result is not a copy of the display (as
selected by ), suspect GPIB problems in the analyzer.
HARDCOPY
Select Copy Port
PRESET SYSTEM OPTIONS
GPIB
System Controller
HARDCOPY
Select Copy Port
Print/Plot GPIB Addr
Prior Menu
Start
Define Hardcopy
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