Tektronix 2205 Service Manual

Maintenance-2205 Service
Table 6-3
internal Inspection Checklist
Item
Inspect For
Repair Action
Circuit Boards
Loose, broken, or corroded solder
connections. Burned circuit boards.
Burned, broken, or cracked
circuit-run plating.
Clean solder corrosion with an
eraser and flush with isopropyl
alcohol. Resolder defective con
nections. Determine cause of
burned items and repair. Repair
defective circuit runs.
Resistors
Burned, cracked, broken, or
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 on leads or
: terminals.
Replace defective capacitors. Clean
solder connections and flush with
isopropyl alcohol.
Wiring and Cables
Loose plugs or connectors. Burned,
broken, or frayed wiring.
Firmly seat connectors. Repair or
replace defective wires or cables.
Chassis Dents, deformations, and damaged
hardware.
Straighten, repair, or replace
defective hardware.
SEMICONDUCTOR CHECKS
Periodic checks of the transistors and other
semiconductors in the oscilloscope are not recom
mended. The best check of semiconductor per
formance is actual operation in the instrument.
PERIODIC READJUSTMENT
To ensure accurate measurerrienfs. check the
performance of this instrument every 2000 hours of
operation, or if used infrequently, once each year. In
addition, replacement of components may ne
cessitate readjustment of the affected circuits.
Complete performance check and adjustment in
structions are given in Sections 4 and 5. The per
formance cheek procedure can also be helpful in
localizing certain troubles in the instrument. In some
cases, minor problems may be revealed or cor
rected by readjustment. If only a partial adjustment
is performed, see the interaction chart, Table 5-1,
for possible adjustment interaction with other
circuits.
aAIWWVVVi
i CAUTION 5
w vw w v w S
Most spray-type circuit coolants contain
Freon 12 as a propellant. Because many
Freons adversely affect switch contacts, do
not use spray-type coolants on the switches
or attenuators. Carbon based solvents will
damage the circuit board material.
LUBRICATION
Most of the potentiometers used in this instru
ment are permanently sealed and generally do not
require periodic lubrication. All switches, both
rotary- and lever-type, are installed with proper
lubrication applied where necessary and wilt rarely
require any additional lubrication. A regular periodic
lubrication program for the instrument is, therefore,
not recommended.
6-4

Tektronix 2205 Specifications

General

Brand	Tektronix
Model	2205
Category	Test Equipment
Language	English