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MAINTENANCE
REGULAR MAINTENANCE
This instrument does not require any regular maintenance. Traceable calibration of the
pulse parameters should be established using a calibrated measurement of the output,
rather than relying on instrument settings.
On occasion, one or more of the four rear-panel fuses may require replacement. All
fuses can be accessed from the rear panel. See the “FUSES” section for details.
CLEANING
If desired, the interior of the instrument may be cleaned using compressed air to
dislodge any accumulated dust. (See the “TOP COVER REMOVAL” section for
instructions on accessing the interior.) No other cleaning is recommended.
TRIGGER DAMAGE
The rear-panel TRIG input, used in the external trigger mode, is protected by a diode
clamping circuit. However, the protection circuit is not foolproof, and it is possible for a
grossly excessive signal to damage the trigger circuitry on the main timing control
board (the 4×10 inch board on the right side of the instrument).
The IC that is most likely to fail under these conditions is installed in a socket. It is a
standard TTL IC in a 16-pin plastic DIP package, model 74F151 or equivalent.
If you suspect that this IC has been damaged, turn off the power and replace this IC. It
may be replaced by a 74F151, 74LS151, 74ALS151, or 74HCT151.
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Содержание AVRQ-5-B
Страница 52: ...Bottom side 52 ...
Страница 56: ...Top side Bottom side A P6246 differential probe was used to observe the logic outputs in the TLP2366 tests 56 ...
Страница 57: ...PCB 299B FOR ADUM241E0BRWZ 57 ...
Страница 82: ...PCB 158R2 LOW VOLTAGE POWER SUPPLY ...
Страница 87: ...DUT WIRING ON STANDARD DAUGHTERBOARD PCB 267C ...
Страница 88: ...DUT WIRING ON CUSTOMIZED TLP2366 DAUGHTERBOARD PCB 298B ...
Страница 89: ...DUT WIRING ON CUSTOMIZED ADUM241E0BRWZ DAUGHTERBOARD PCB 299B ...
Страница 91: ...PERFORMANCE CHECK SHEET 91 ...