General Maintenance
4- 4
WFM6100, WFM7000, and WFM7100 With Option FP Service Manual
CAUTION.
To prevent damage from electrical arcing, ensure that circuit boards
and components are dry before applying power to the waveform monitor.
Table 4- 2: Internal inspection check list
Item
Inspect for
Repair action
Circuit boards
Loose, broken, or corroded
solder connections. Burned
circuit boards. Burned, broken, or
cracked circuit-run plating.
Remove and replace damaged
circuit board.
Resistors
Burned, cracked, broken, blis-
tered condition.
Remove and replace damaged
circuit board.
Solder connections
Cold solder or rosin joints.
Resolder joint and clean with
isopropyl alcohol.
Capacitors
Damaged or leaking cases.
Corroded solder on leads or
terminals.
Remove and replace damaged
circuit board.
Wiring and cables
Loose plugs or connectors.
Burned, broken, or frayed wiring.
Firmly seat connectors. Repair or
replace modules with defective
wires or cables.
Chassis
Dents, deformations, and dam-
aged hardware.
Straighten, repair, or replace
defective hardware.
Cleaning Procedure — Interior.
To clean the waveform monitor interior, perform
the following 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.)
STOP
. If, after doing steps 1 and 2, a module is clean upon inspection, skip the
remaining steps.
3.
If steps 1 and 2 do not remove all the dust or dirt, the waveform monitor
may be spray washed using a solution of 75% isopropyl alcohol by doing
steps 4 through 6.
4.
Gain access to the parts to be cleaned by removing easily accessible shields
and panels.
Содержание WFM6100 Opt. MB
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Страница 76: ...Replaceable Parts 5 12 WFM6100 WFM7000 and WFM7100 With Option FP Service Manual ...