ENDEVCO 6634C
INSTRUCTION MANUAL
IM6634C
Page 5-1
SECTION 5:
MAINTENANCE
1.
ROUTINE MAINTENANCE AND HANDLING
The ENDEVCO Model 6634C is a rugged, self-contained piece of electronic equipment which requires minimal
maintenance and permits rapid replacement of modular assemblies.
The ENDEVCO 6634C Vibration Amplifier is designed to require no component-level repair by the user. However,
detailed schematics are available upon request. When requesting schematics, specify: SC29214, SC29216, and
SC29218.
The only periodic functions performed by the user, except for quality calibration considerations, are to check the integrity
of any external wires and connectors in use. Any component failures simply require that the faulty subassembly be
removed by the user and returned to ENDEVCO, to be replaced with a fully functional item.
WARNING: REMOVE POWER BEFORE OPENING UNIT.
Some suggestions for simple routine maintenance operations are:
A.
REPLACING FUSES
Make certain that the correct fuse is installed for the power voltage selected. The Model 6634C has a 2 amp fuse.
Fuse holder is located to the left of the power supply on the main board. (See Figure 5-1) If a fuse is blown, take
steps to determine the cause. In particular, make certain that the line power in use matches the voltage marked
on the switch. The use of improper voltages and fuse ratings can seriously damage the electronic components
and void the warranty of the system.
B.
IN CASE OF ACCIDENTS
If any accidental damage to the equipment occurs, such as dropping the rack, spilling liquids on the case, etc., take
the following steps:
During Operation: Power down, suspends the test and visually examines the equipment. If no damage is noticed,
power-up and repeat calibration as described in Section 2. If damage is observed or calibration indicates
functional problems, refer to Section 5.2.
Non-Operational: Visually examine the equipment, removing and reinserting the cards if necessary. If no damage
is noted, repeat power-up and calibration as described above.
2.
VERIFYING AND EXCHANGING FAULTY ASSEMBLIES
Procedures for returning nonworking assemblies to ENDEVCO.
The ENDEVCO Model 6634C is manufactured to be a rugged, dependable electronic instrument. Occasionally, however,
electronic boards, power supplies, etc., develop problems that make replacement necessary. The error messages
previously described indicate when certain hardware problems have occurred and will assist in locating the problem. The
6634C Vibration Amplifier is comprised of plug-in cards to enable the user to quickly and easily replace faulty cards when
they are shown to be defective.
If an error message indicates a failure, first check all cables and connections for breaks and proper seating. If necessary,
replace cables with others that are known to be reliable. Next, switch the malfunctioning card with one that is known to be
functioning correctly to see if the trouble persists. In this manner the fault can be traced to a plug-in
