6-6
Complete Performance Check and Adjustment pro-
cedures are given in Sections 4 and 5. The Performance
Check Procedure can also be helpful in localizing certain
troubles in the instrument. In some cases, minor problems
may be revealed or corrected by readjustment.
Periodic checks of the transistors and other semicon-
ductors in the oscilloscope are not recommended. The
best check of semiconductor performance is actual opera-
tion in the instrument.
SEMICONDUCTOR CHECKS
To ensure accurate measurements, check the perform-
ance of this instrument every 2000 hours of operation, or if
used infrequently, once each year. In addition, replacement
of components may necessitate readjustment of the
affected circuits.
There is no periodic lubrication required for this
instrument.
PERIODIC READJUSTMENT
LUBRICATION
Item
Inspect For Repair Action
Circuit Boards
Loose, broken, or corroded solder connec-
Clean solder corrosion with an eraser and
tions. Burned circuit boards. Burned,
bro-
flush with isopropyl alcohol. Resolder defec-
ken, or cracked circuit-run plating. tive connections. Determine
cause
of
burned items and repair. Repair defective
circuit runs.
Resistors
Burned, cracked, broken, blistered. Replace defective resistors. Check for
cause of burned component and repair as
necessary.
Solder Connections Cold solder or rosin joints,
Resolder joint and clean with isopropyl
alcohol.
Capacitors
Damaged or leaking cases. Corroded solder Replace defective capacitors. Clean solder
on leads or terminals.
connections and flush with isopropyl
alcohol.
Semiconductors
Loosely inserted in sockets. Distorted pins. Firmly seat loose semiconductors. Remove
devices having distorted pins. Carefully
straighten pins (as required
to
fit the
socket), using long-nose pliers, and reinsert
firmly. Ensure that straightening action
does not crack pins, causing them to break
off.
Wiring and Cables
Loose plugs or connectors. Burned, broken, Firmly seat connectors. Repair or replace
or frayed wiring.
defective wires or cables.
Chassis
Dents, deformations,
and damaged Straighten, repair, or replace defective
hardware.
hardware.
Table 6-3
Internal Inspection Check List
Maintenance-2430 Service
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