MAINTENANCE
REGULAR MAINTENANCE
This instrument does not require any regular maintenance.
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.
44
Summary of Contents for 14260
Page 5: ...Last modified July 28 2022 Copyright 2022 Avtech Electrosystems Ltd All Rights Reserved 5...
Page 46: ...PCB 158R4 LOW VOLTAGE POWER SUPPLY...
Page 47: ...PCB 235D HIGH VOLTAGE DC POWER SUPPLY...
Page 48: ...PCB 104H KEYPAD DISPLAY BOARD...
Page 49: ...PCB 201C INTERLOCK CONTROL...
Page 50: ...MAIN WIRING...
Page 52: ...TEST JIG WIRING AVX TFR SOD123W...
Page 53: ...TEST JIG WIRING AVX TFR SOD128...
Page 54: ...PERFORMANCE CHECK SHEET 54...