Table 6-3: Internal Inspection Check List - Sony Tektronix AWG2021 Service Manual

Maintenance
6-6
CAUTION. To prevent damage from electrical arcing, ensure that circuit boards
and components are dry before applying power to the AWG2021.

Table 6-3: Internal Inspection Check List

Item Inspect For
Circuit boards Loose, broken, or corroded
solder connections; burned circuit
boards; burned, broken, or
cracked circuit run plating
Resistors Burned, cracked, broken, blis
tered condition
Solder connections Cold solder or rosin joints
Capacitors Damaged or leaking cases;
corroded solder on leads or
terminals
Semiconductors Loosely inserted in sockets.;
distorted pins.
Wiring and cables Loose plugs or connectors;
burned, broken, or frayed wiring.
Chassis Dents, deformations, and dam
aged hardware
Cleaning Procedure Interior. If, after doing steps 1 and 2, a module is clean
upon inspection, skip the remaining steps.
1. Blow off dust with dry, low-pressure, deionized air (approximately 9 psi).
2. Remove any remaining dust with a lint-free cloth dampened in isopropyl
alcohol (75% solution), and rinse with warm deionized water. (A cotton-
tipped applicator is useful for cleaning in narrow spaces and on circuit
boards.)
3. If steps 1 and 2 do not remove all the dust or dirt, the AWG2021 may be
spray washed using a solution of 75% isopropyl alcohol by doing step 4
through 8.
Repair Action
Remove failed modules and
replace with a new module.
Replace failed module and
replace with a new module.
Resolder joint and clean with
isopropyl alcohol.
Remove damaged module and
replace with a new module from
the factory.
Firmly seat loose semiconduc
tors. Remove devices that have
distorted pins. Carefully straight
en 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.
Firmly seat connectors. Repair or
replace modules with defective
wires or cables.
Straighten, repair, or replace
defective hardware.
AWG2021 Service Manual